ffmpeg / libavformat / mov.c @ 773947ba
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/*
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* MOV demuxer
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <limits.h> |
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//#define DEBUG
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//#define DEBUG_METADATA
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//#define MOV_EXPORT_ALL_METADATA
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/avstring.h" |
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "riff.h" |
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#include "isom.h" |
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#include "libavcodec/get_bits.h" |
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#if CONFIG_ZLIB
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#include <zlib.h> |
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#endif
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/*
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* First version by Francois Revol revol@free.fr
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* Seek function by Gael Chardon gael.dev@4now.net
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*
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* Features and limitations:
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* - reads most of the QT files I have (at least the structure),
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* Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html
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* - the code is quite ugly... maybe I won't do it recursive next time :-)
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*
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* Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/
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* when coding this :) (it's a writer anyway)
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*
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* Reference documents:
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* http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt
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* Apple:
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* http://developer.apple.com/documentation/QuickTime/QTFF/
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* http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf
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* QuickTime is a trademark of Apple (AFAIK :))
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*/
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#include "qtpalette.h" |
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#undef NDEBUG
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#include <assert.h> |
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/* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */
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/* those functions parse an atom */
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/* return code:
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0: continue to parse next atom
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<0: error occurred, exit
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*/
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/* links atom IDs to parse functions */
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typedef struct MOVParseTableEntry { |
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uint32_t type; |
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int (*parse)(MOVContext *ctx, AVIOContext *pb, MOVAtom atom);
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} MOVParseTableEntry; |
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static const MOVParseTableEntry mov_default_parse_table[]; |
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static int mov_metadata_trkn(MOVContext *c, AVIOContext *pb, unsigned len) |
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{
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char buf[16]; |
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avio_rb16(pb); // unknown
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snprintf(buf, sizeof(buf), "%d", avio_rb16(pb)); |
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av_metadata_set2(&c->fc->metadata, "track", buf, 0); |
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avio_rb16(pb); // total tracks
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return 0; |
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} |
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|
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static const uint32_t mac_to_unicode[128] = { |
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0x00C4,0x00C5,0x00C7,0x00C9,0x00D1,0x00D6,0x00DC,0x00E1, |
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0x00E0,0x00E2,0x00E4,0x00E3,0x00E5,0x00E7,0x00E9,0x00E8, |
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0x00EA,0x00EB,0x00ED,0x00EC,0x00EE,0x00EF,0x00F1,0x00F3, |
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0x00F2,0x00F4,0x00F6,0x00F5,0x00FA,0x00F9,0x00FB,0x00FC, |
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0x2020,0x00B0,0x00A2,0x00A3,0x00A7,0x2022,0x00B6,0x00DF, |
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0x00AE,0x00A9,0x2122,0x00B4,0x00A8,0x2260,0x00C6,0x00D8, |
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0x221E,0x00B1,0x2264,0x2265,0x00A5,0x00B5,0x2202,0x2211, |
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0x220F,0x03C0,0x222B,0x00AA,0x00BA,0x03A9,0x00E6,0x00F8, |
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0x00BF,0x00A1,0x00AC,0x221A,0x0192,0x2248,0x2206,0x00AB, |
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0x00BB,0x2026,0x00A0,0x00C0,0x00C3,0x00D5,0x0152,0x0153, |
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0x2013,0x2014,0x201C,0x201D,0x2018,0x2019,0x00F7,0x25CA, |
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0x00FF,0x0178,0x2044,0x20AC,0x2039,0x203A,0xFB01,0xFB02, |
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0x2021,0x00B7,0x201A,0x201E,0x2030,0x00C2,0x00CA,0x00C1, |
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0x00CB,0x00C8,0x00CD,0x00CE,0x00CF,0x00CC,0x00D3,0x00D4, |
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0xF8FF,0x00D2,0x00DA,0x00DB,0x00D9,0x0131,0x02C6,0x02DC, |
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0x00AF,0x02D8,0x02D9,0x02DA,0x00B8,0x02DD,0x02DB,0x02C7, |
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}; |
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static int mov_read_mac_string(MOVContext *c, AVIOContext *pb, int len, |
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char *dst, int dstlen) |
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{
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char *p = dst;
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char *end = dst+dstlen-1; |
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int i;
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for (i = 0; i < len; i++) { |
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uint8_t t, c = avio_r8(pb); |
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if (c < 0x80 && p < end) |
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*p++ = c; |
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else
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PUT_UTF8(mac_to_unicode[c-0x80], t, if (p < end) *p++ = t;); |
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} |
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*p = 0;
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return p - dst;
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} |
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static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
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{
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#ifdef MOV_EXPORT_ALL_METADATA
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char tmp_key[5]; |
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#endif
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char str[1024], key2[16], language[4] = {0}; |
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const char *key = NULL; |
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uint16_t str_size, langcode = 0;
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uint32_t data_type = 0;
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int (*parse)(MOVContext*, AVIOContext*, unsigned) = NULL; |
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switch (atom.type) {
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case MKTAG(0xa9,'n','a','m'): key = "title"; break; |
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case MKTAG(0xa9,'a','u','t'): |
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case MKTAG(0xa9,'A','R','T'): key = "artist"; break; |
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case MKTAG(0xa9,'w','r','t'): key = "composer"; break; |
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case MKTAG( 'c','p','r','t'): |
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case MKTAG(0xa9,'c','p','y'): key = "copyright"; break; |
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case MKTAG(0xa9,'c','m','t'): |
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case MKTAG(0xa9,'i','n','f'): key = "comment"; break; |
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case MKTAG(0xa9,'a','l','b'): key = "album"; break; |
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case MKTAG(0xa9,'d','a','y'): key = "date"; break; |
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case MKTAG(0xa9,'g','e','n'): key = "genre"; break; |
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case MKTAG(0xa9,'t','o','o'): |
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case MKTAG(0xa9,'s','w','r'): key = "encoder"; break; |
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case MKTAG(0xa9,'e','n','c'): key = "encoder"; break; |
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case MKTAG( 'd','e','s','c'): key = "description";break; |
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case MKTAG( 'l','d','e','s'): key = "synopsis"; break; |
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case MKTAG( 't','v','s','h'): key = "show"; break; |
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case MKTAG( 't','v','e','n'): key = "episode_id";break; |
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case MKTAG( 't','v','n','n'): key = "network"; break; |
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case MKTAG( 't','r','k','n'): key = "track"; |
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parse = mov_metadata_trkn; break;
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} |
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|
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if (c->itunes_metadata && atom.size > 8) { |
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int data_size = avio_rb32(pb);
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int tag = avio_rl32(pb);
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if (tag == MKTAG('d','a','t','a')) { |
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data_type = avio_rb32(pb); // type
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avio_rb32(pb); // unknown
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str_size = data_size - 16;
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atom.size -= 16;
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} else return 0; |
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} else if (atom.size > 4 && key && !c->itunes_metadata) { |
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str_size = avio_rb16(pb); // string length
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langcode = avio_rb16(pb); |
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ff_mov_lang_to_iso639(langcode, language); |
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atom.size -= 4;
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} else
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str_size = atom.size; |
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#ifdef MOV_EXPORT_ALL_METADATA
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if (!key) {
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snprintf(tmp_key, 5, "%.4s", (char*)&atom.type); |
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key = tmp_key; |
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} |
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#endif
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if (!key)
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return 0; |
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if (atom.size < 0) |
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return -1; |
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str_size = FFMIN3(sizeof(str)-1, str_size, atom.size); |
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if (parse)
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parse(c, pb, str_size); |
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else {
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if (data_type == 3 || (data_type == 0 && langcode < 0x800)) { // MAC Encoded |
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mov_read_mac_string(c, pb, str_size, str, sizeof(str));
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} else {
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avio_read(pb, str, str_size); |
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str[str_size] = 0;
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} |
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av_metadata_set2(&c->fc->metadata, key, str, 0);
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if (*language && strcmp(language, "und")) { |
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snprintf(key2, sizeof(key2), "%s-%s", key, language); |
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av_metadata_set2(&c->fc->metadata, key2, str, 0);
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} |
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} |
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#ifdef DEBUG_METADATA
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av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
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av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
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key, str, (char*)&atom.type, str_size, atom.size);
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#endif
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return 0; |
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} |
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static int mov_read_chpl(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
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{
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int64_t start; |
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int i, nb_chapters, str_len, version;
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char str[256+1]; |
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if ((atom.size -= 5) < 0) |
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return 0; |
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version = avio_r8(pb); |
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avio_rb24(pb); |
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if (version)
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avio_rb32(pb); // ???
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nb_chapters = avio_r8(pb); |
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for (i = 0; i < nb_chapters; i++) { |
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if (atom.size < 9) |
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return 0; |
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start = avio_rb64(pb); |
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str_len = avio_r8(pb); |
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if ((atom.size -= 9+str_len) < 0) |
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return 0; |
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avio_read(pb, str, str_len); |
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str[str_len] = 0;
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ff_new_chapter(c->fc, i, (AVRational){1,10000000}, start, AV_NOPTS_VALUE, str);
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} |
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return 0; |
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} |
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|
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static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
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{
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int64_t total_size = 0;
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MOVAtom a; |
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int i;
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if (atom.size < 0) |
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atom.size = INT64_MAX; |
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while (total_size + 8 < atom.size && !url_feof(pb)) { |
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int (*parse)(MOVContext*, AVIOContext*, MOVAtom) = NULL; |
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a.size = atom.size; |
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a.type=0;
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if(atom.size >= 8) { |
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a.size = avio_rb32(pb); |
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a.type = avio_rl32(pb); |
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} |
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av_dlog(c->fc, "type: %08x '%.4s' parent:'%.4s' sz: %"PRId64" %"PRId64" %"PRId64"\n", |
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a.type, (char*)&a.type, (char*)&atom.type, a.size, total_size, atom.size); |
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total_size += 8;
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if (a.size == 1) { /* 64 bit extended size */ |
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a.size = avio_rb64(pb) - 8;
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total_size += 8;
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} |
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if (a.size == 0) { |
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a.size = atom.size - total_size; |
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if (a.size <= 8) |
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break;
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} |
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a.size -= 8;
|
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if(a.size < 0) |
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break;
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a.size = FFMIN(a.size, atom.size - total_size); |
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|
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for (i = 0; mov_default_parse_table[i].type; i++) |
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if (mov_default_parse_table[i].type == a.type) {
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parse = mov_default_parse_table[i].parse; |
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break;
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} |
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|
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// container is user data
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if (!parse && (atom.type == MKTAG('u','d','t','a') || |
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atom.type == MKTAG('i','l','s','t'))) |
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parse = mov_read_udta_string; |
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|
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if (!parse) { /* skip leaf atoms data */ |
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avio_seek(pb, a.size, SEEK_CUR); |
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} else {
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int64_t start_pos = url_ftell(pb); |
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int64_t left; |
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int err = parse(c, pb, a);
|
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if (err < 0) |
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return err;
|
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if (c->found_moov && c->found_mdat &&
|
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(url_is_streamed(pb) || start_pos + a.size == url_fsize(pb))) |
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return 0; |
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left = a.size - url_ftell(pb) + start_pos; |
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if (left > 0) /* skip garbage at atom end */ |
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avio_seek(pb, left, SEEK_CUR); |
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} |
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|
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total_size += a.size; |
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} |
| 316 |
|
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if (total_size < atom.size && atom.size < 0x7ffff) |
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avio_seek(pb, atom.size - total_size, SEEK_CUR); |
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|
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return 0; |
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} |
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|
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static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
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{
|
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AVStream *st; |
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MOVStreamContext *sc; |
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int entries, i, j;
|
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|
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if (c->fc->nb_streams < 1) |
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return 0; |
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st = c->fc->streams[c->fc->nb_streams-1];
|
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sc = st->priv_data; |
| 333 |
|
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avio_rb32(pb); // version + flags
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entries = avio_rb32(pb); |
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if (entries >= UINT_MAX / sizeof(*sc->drefs)) |
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return -1; |
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sc->drefs = av_mallocz(entries * sizeof(*sc->drefs));
|
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if (!sc->drefs)
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return AVERROR(ENOMEM);
|
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sc->drefs_count = entries; |
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|
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for (i = 0; i < sc->drefs_count; i++) { |
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MOVDref *dref = &sc->drefs[i]; |
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uint32_t size = avio_rb32(pb); |
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int64_t next = url_ftell(pb) + size - 4;
|
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|
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if (size < 12) |
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return -1; |
| 350 |
|
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dref->type = avio_rl32(pb); |
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avio_rb32(pb); // version + flags
|
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av_dlog(c->fc, "type %.4s size %d\n", (char*)&dref->type, size); |
| 354 |
|
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if (dref->type == MKTAG('a','l','i','s') && size > 150) { |
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/* macintosh alias record */
|
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uint16_t volume_len, len; |
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int16_t type; |
| 359 |
|
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avio_seek(pb, 10, SEEK_CUR);
|
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|
| 362 |
volume_len = avio_r8(pb); |
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volume_len = FFMIN(volume_len, 27);
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avio_read(pb, dref->volume, 27);
|
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dref->volume[volume_len] = 0;
|
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av_log(c->fc, AV_LOG_DEBUG, "volume %s, len %d\n", dref->volume, volume_len);
|
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|
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avio_seek(pb, 12, SEEK_CUR);
|
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|
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len = avio_r8(pb); |
| 371 |
len = FFMIN(len, 63);
|
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avio_read(pb, dref->filename, 63);
|
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dref->filename[len] = 0;
|
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av_log(c->fc, AV_LOG_DEBUG, "filename %s, len %d\n", dref->filename, len);
|
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|
| 376 |
avio_seek(pb, 16, SEEK_CUR);
|
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|
| 378 |
/* read next level up_from_alias/down_to_target */
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dref->nlvl_from = avio_rb16(pb); |
| 380 |
dref->nlvl_to = avio_rb16(pb); |
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av_log(c->fc, AV_LOG_DEBUG, "nlvl from %d, nlvl to %d\n",
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dref->nlvl_from, dref->nlvl_to); |
| 383 |
|
| 384 |
avio_seek(pb, 16, SEEK_CUR);
|
| 385 |
|
| 386 |
for (type = 0; type != -1 && url_ftell(pb) < next; ) { |
| 387 |
type = avio_rb16(pb); |
| 388 |
len = avio_rb16(pb); |
| 389 |
av_log(c->fc, AV_LOG_DEBUG, "type %d, len %d\n", type, len);
|
| 390 |
if (len&1) |
| 391 |
len += 1;
|
| 392 |
if (type == 2) { // absolute path |
| 393 |
av_free(dref->path); |
| 394 |
dref->path = av_mallocz(len+1);
|
| 395 |
if (!dref->path)
|
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return AVERROR(ENOMEM);
|
| 397 |
avio_read(pb, dref->path, len); |
| 398 |
if (len > volume_len && !strncmp(dref->path, dref->volume, volume_len)) {
|
| 399 |
len -= volume_len; |
| 400 |
memmove(dref->path, dref->path+volume_len, len); |
| 401 |
dref->path[len] = 0;
|
| 402 |
} |
| 403 |
for (j = 0; j < len; j++) |
| 404 |
if (dref->path[j] == ':') |
| 405 |
dref->path[j] = '/';
|
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av_log(c->fc, AV_LOG_DEBUG, "path %s\n", dref->path);
|
| 407 |
} else if (type == 0) { // directory name |
| 408 |
av_free(dref->dir); |
| 409 |
dref->dir = av_malloc(len+1);
|
| 410 |
if (!dref->dir)
|
| 411 |
return AVERROR(ENOMEM);
|
| 412 |
avio_read(pb, dref->dir, len); |
| 413 |
dref->dir[len] = 0;
|
| 414 |
for (j = 0; j < len; j++) |
| 415 |
if (dref->dir[j] == ':') |
| 416 |
dref->dir[j] = '/';
|
| 417 |
av_log(c->fc, AV_LOG_DEBUG, "dir %s\n", dref->dir);
|
| 418 |
} else
|
| 419 |
avio_seek(pb, len, SEEK_CUR); |
| 420 |
} |
| 421 |
} |
| 422 |
avio_seek(pb, next, SEEK_SET); |
| 423 |
} |
| 424 |
return 0; |
| 425 |
} |
| 426 |
|
| 427 |
static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 428 |
{
|
| 429 |
AVStream *st; |
| 430 |
uint32_t type; |
| 431 |
uint32_t ctype; |
| 432 |
|
| 433 |
if (c->fc->nb_streams < 1) // meta before first trak |
| 434 |
return 0; |
| 435 |
|
| 436 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 437 |
|
| 438 |
avio_r8(pb); /* version */
|
| 439 |
avio_rb24(pb); /* flags */
|
| 440 |
|
| 441 |
/* component type */
|
| 442 |
ctype = avio_rl32(pb); |
| 443 |
type = avio_rl32(pb); /* component subtype */
|
| 444 |
|
| 445 |
av_dlog(c->fc, "ctype= %.4s (0x%08x)\n", (char*)&ctype, ctype); |
| 446 |
av_dlog(c->fc, "stype= %.4s\n", (char*)&type); |
| 447 |
|
| 448 |
if (type == MKTAG('v','i','d','e')) |
| 449 |
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 450 |
else if(type == MKTAG('s','o','u','n')) |
| 451 |
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 452 |
else if(type == MKTAG('m','1','a',' ')) |
| 453 |
st->codec->codec_id = CODEC_ID_MP2; |
| 454 |
else if(type == MKTAG('s','u','b','p')) |
| 455 |
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| 456 |
|
| 457 |
avio_rb32(pb); /* component manufacture */
|
| 458 |
avio_rb32(pb); /* component flags */
|
| 459 |
avio_rb32(pb); /* component flags mask */
|
| 460 |
|
| 461 |
return 0; |
| 462 |
} |
| 463 |
|
| 464 |
int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
|
| 465 |
{
|
| 466 |
AVStream *st; |
| 467 |
int tag, len;
|
| 468 |
|
| 469 |
if (fc->nb_streams < 1) |
| 470 |
return 0; |
| 471 |
st = fc->streams[fc->nb_streams-1];
|
| 472 |
|
| 473 |
avio_rb32(pb); /* version + flags */
|
| 474 |
len = ff_mp4_read_descr(fc, pb, &tag); |
| 475 |
if (tag == MP4ESDescrTag) {
|
| 476 |
avio_rb16(pb); /* ID */
|
| 477 |
avio_r8(pb); /* priority */
|
| 478 |
} else
|
| 479 |
avio_rb16(pb); /* ID */
|
| 480 |
|
| 481 |
len = ff_mp4_read_descr(fc, pb, &tag); |
| 482 |
if (tag == MP4DecConfigDescrTag)
|
| 483 |
ff_mp4_read_dec_config_descr(fc, st, pb); |
| 484 |
return 0; |
| 485 |
} |
| 486 |
|
| 487 |
static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 488 |
{
|
| 489 |
return ff_mov_read_esds(c->fc, pb, atom);
|
| 490 |
} |
| 491 |
|
| 492 |
static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 493 |
{
|
| 494 |
AVStream *st; |
| 495 |
int ac3info, acmod, lfeon;
|
| 496 |
|
| 497 |
if (c->fc->nb_streams < 1) |
| 498 |
return 0; |
| 499 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 500 |
|
| 501 |
ac3info = avio_rb24(pb); |
| 502 |
acmod = (ac3info >> 11) & 0x7; |
| 503 |
lfeon = (ac3info >> 10) & 0x1; |
| 504 |
st->codec->channels = ((int[]){2,1,2,3,3,4,4,5})[acmod] + lfeon; |
| 505 |
|
| 506 |
return 0; |
| 507 |
} |
| 508 |
|
| 509 |
static int mov_read_pasp(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 510 |
{
|
| 511 |
const int num = avio_rb32(pb); |
| 512 |
const int den = avio_rb32(pb); |
| 513 |
AVStream *st; |
| 514 |
|
| 515 |
if (c->fc->nb_streams < 1) |
| 516 |
return 0; |
| 517 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 518 |
|
| 519 |
if ((st->sample_aspect_ratio.den != 1 || st->sample_aspect_ratio.num) && // default |
| 520 |
(den != st->sample_aspect_ratio.den || num != st->sample_aspect_ratio.num)) {
|
| 521 |
av_log(c->fc, AV_LOG_WARNING, |
| 522 |
"sample aspect ratio already set to %d:%d, ignoring 'pasp' atom (%d:%d)\n",
|
| 523 |
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, |
| 524 |
num, den); |
| 525 |
} else if (den != 0) { |
| 526 |
st->sample_aspect_ratio.num = num; |
| 527 |
st->sample_aspect_ratio.den = den; |
| 528 |
} |
| 529 |
return 0; |
| 530 |
} |
| 531 |
|
| 532 |
/* this atom contains actual media data */
|
| 533 |
static int mov_read_mdat(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 534 |
{
|
| 535 |
if(atom.size == 0) /* wrong one (MP4) */ |
| 536 |
return 0; |
| 537 |
c->found_mdat=1;
|
| 538 |
return 0; /* now go for moov */ |
| 539 |
} |
| 540 |
|
| 541 |
/* read major brand, minor version and compatible brands and store them as metadata */
|
| 542 |
static int mov_read_ftyp(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 543 |
{
|
| 544 |
uint32_t minor_ver; |
| 545 |
int comp_brand_size;
|
| 546 |
char minor_ver_str[11]; /* 32 bit integer -> 10 digits + null */ |
| 547 |
char* comp_brands_str;
|
| 548 |
uint8_t type[5] = {0}; |
| 549 |
|
| 550 |
avio_read(pb, type, 4);
|
| 551 |
if (strcmp(type, "qt ")) |
| 552 |
c->isom = 1;
|
| 553 |
av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type); |
| 554 |
av_metadata_set2(&c->fc->metadata, "major_brand", type, 0); |
| 555 |
minor_ver = avio_rb32(pb); /* minor version */
|
| 556 |
snprintf(minor_ver_str, sizeof(minor_ver_str), "%d", minor_ver); |
| 557 |
av_metadata_set2(&c->fc->metadata, "minor_version", minor_ver_str, 0); |
| 558 |
|
| 559 |
comp_brand_size = atom.size - 8;
|
| 560 |
if (comp_brand_size < 0) |
| 561 |
return -1; |
| 562 |
comp_brands_str = av_malloc(comp_brand_size + 1); /* Add null terminator */ |
| 563 |
if (!comp_brands_str)
|
| 564 |
return AVERROR(ENOMEM);
|
| 565 |
avio_read(pb, comp_brands_str, comp_brand_size); |
| 566 |
comp_brands_str[comp_brand_size] = 0;
|
| 567 |
av_metadata_set2(&c->fc->metadata, "compatible_brands", comp_brands_str, 0); |
| 568 |
av_freep(&comp_brands_str); |
| 569 |
|
| 570 |
return 0; |
| 571 |
} |
| 572 |
|
| 573 |
/* this atom should contain all header atoms */
|
| 574 |
static int mov_read_moov(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 575 |
{
|
| 576 |
if (mov_read_default(c, pb, atom) < 0) |
| 577 |
return -1; |
| 578 |
/* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */
|
| 579 |
/* so we don't parse the whole file if over a network */
|
| 580 |
c->found_moov=1;
|
| 581 |
return 0; /* now go for mdat */ |
| 582 |
} |
| 583 |
|
| 584 |
static int mov_read_moof(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 585 |
{
|
| 586 |
c->fragment.moof_offset = url_ftell(pb) - 8;
|
| 587 |
av_dlog(c->fc, "moof offset %llx\n", c->fragment.moof_offset);
|
| 588 |
return mov_read_default(c, pb, atom);
|
| 589 |
} |
| 590 |
|
| 591 |
static void mov_metadata_creation_time(AVMetadata **metadata, time_t time) |
| 592 |
{
|
| 593 |
char buffer[32]; |
| 594 |
if (time) {
|
| 595 |
struct tm *ptm;
|
| 596 |
time -= 2082844800; /* seconds between 1904-01-01 and Epoch */ |
| 597 |
ptm = gmtime(&time); |
| 598 |
if (!ptm) return; |
| 599 |
strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm); |
| 600 |
av_metadata_set2(metadata, "creation_time", buffer, 0); |
| 601 |
} |
| 602 |
} |
| 603 |
|
| 604 |
static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 605 |
{
|
| 606 |
AVStream *st; |
| 607 |
MOVStreamContext *sc; |
| 608 |
int version;
|
| 609 |
char language[4] = {0}; |
| 610 |
unsigned lang;
|
| 611 |
time_t creation_time; |
| 612 |
|
| 613 |
if (c->fc->nb_streams < 1) |
| 614 |
return 0; |
| 615 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 616 |
sc = st->priv_data; |
| 617 |
|
| 618 |
version = avio_r8(pb); |
| 619 |
if (version > 1) |
| 620 |
return -1; /* unsupported */ |
| 621 |
|
| 622 |
avio_rb24(pb); /* flags */
|
| 623 |
if (version == 1) { |
| 624 |
creation_time = avio_rb64(pb); |
| 625 |
avio_rb64(pb); |
| 626 |
} else {
|
| 627 |
creation_time = avio_rb32(pb); |
| 628 |
avio_rb32(pb); /* modification time */
|
| 629 |
} |
| 630 |
mov_metadata_creation_time(&st->metadata, creation_time); |
| 631 |
|
| 632 |
sc->time_scale = avio_rb32(pb); |
| 633 |
st->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */ |
| 634 |
|
| 635 |
lang = avio_rb16(pb); /* language */
|
| 636 |
if (ff_mov_lang_to_iso639(lang, language))
|
| 637 |
av_metadata_set2(&st->metadata, "language", language, 0); |
| 638 |
avio_rb16(pb); /* quality */
|
| 639 |
|
| 640 |
return 0; |
| 641 |
} |
| 642 |
|
| 643 |
static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 644 |
{
|
| 645 |
time_t creation_time; |
| 646 |
int version = avio_r8(pb); /* version */ |
| 647 |
avio_rb24(pb); /* flags */
|
| 648 |
|
| 649 |
if (version == 1) { |
| 650 |
creation_time = avio_rb64(pb); |
| 651 |
avio_rb64(pb); |
| 652 |
} else {
|
| 653 |
creation_time = avio_rb32(pb); |
| 654 |
avio_rb32(pb); /* modification time */
|
| 655 |
} |
| 656 |
mov_metadata_creation_time(&c->fc->metadata, creation_time); |
| 657 |
c->time_scale = avio_rb32(pb); /* time scale */
|
| 658 |
|
| 659 |
av_dlog(c->fc, "time scale = %i\n", c->time_scale);
|
| 660 |
|
| 661 |
c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */ |
| 662 |
avio_rb32(pb); /* preferred scale */
|
| 663 |
|
| 664 |
avio_rb16(pb); /* preferred volume */
|
| 665 |
|
| 666 |
avio_seek(pb, 10, SEEK_CUR); /* reserved */ |
| 667 |
|
| 668 |
avio_seek(pb, 36, SEEK_CUR); /* display matrix */ |
| 669 |
|
| 670 |
avio_rb32(pb); /* preview time */
|
| 671 |
avio_rb32(pb); /* preview duration */
|
| 672 |
avio_rb32(pb); /* poster time */
|
| 673 |
avio_rb32(pb); /* selection time */
|
| 674 |
avio_rb32(pb); /* selection duration */
|
| 675 |
avio_rb32(pb); /* current time */
|
| 676 |
avio_rb32(pb); /* next track ID */
|
| 677 |
|
| 678 |
return 0; |
| 679 |
} |
| 680 |
|
| 681 |
static int mov_read_smi(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 682 |
{
|
| 683 |
AVStream *st; |
| 684 |
|
| 685 |
if (c->fc->nb_streams < 1) |
| 686 |
return 0; |
| 687 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 688 |
|
| 689 |
if((uint64_t)atom.size > (1<<30)) |
| 690 |
return -1; |
| 691 |
|
| 692 |
// currently SVQ3 decoder expect full STSD header - so let's fake it
|
| 693 |
// this should be fixed and just SMI header should be passed
|
| 694 |
av_free(st->codec->extradata); |
| 695 |
st->codec->extradata = av_mallocz(atom.size + 0x5a + FF_INPUT_BUFFER_PADDING_SIZE);
|
| 696 |
if (!st->codec->extradata)
|
| 697 |
return AVERROR(ENOMEM);
|
| 698 |
st->codec->extradata_size = 0x5a + atom.size;
|
| 699 |
memcpy(st->codec->extradata, "SVQ3", 4); // fake |
| 700 |
avio_read(pb, st->codec->extradata + 0x5a, atom.size);
|
| 701 |
av_dlog(c->fc, "Reading SMI %"PRId64" %s\n", atom.size, st->codec->extradata + 0x5a); |
| 702 |
return 0; |
| 703 |
} |
| 704 |
|
| 705 |
static int mov_read_enda(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 706 |
{
|
| 707 |
AVStream *st; |
| 708 |
int little_endian;
|
| 709 |
|
| 710 |
if (c->fc->nb_streams < 1) |
| 711 |
return 0; |
| 712 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 713 |
|
| 714 |
little_endian = avio_rb16(pb); |
| 715 |
av_dlog(c->fc, "enda %d\n", little_endian);
|
| 716 |
if (little_endian == 1) { |
| 717 |
switch (st->codec->codec_id) {
|
| 718 |
case CODEC_ID_PCM_S24BE:
|
| 719 |
st->codec->codec_id = CODEC_ID_PCM_S24LE; |
| 720 |
break;
|
| 721 |
case CODEC_ID_PCM_S32BE:
|
| 722 |
st->codec->codec_id = CODEC_ID_PCM_S32LE; |
| 723 |
break;
|
| 724 |
case CODEC_ID_PCM_F32BE:
|
| 725 |
st->codec->codec_id = CODEC_ID_PCM_F32LE; |
| 726 |
break;
|
| 727 |
case CODEC_ID_PCM_F64BE:
|
| 728 |
st->codec->codec_id = CODEC_ID_PCM_F64LE; |
| 729 |
break;
|
| 730 |
default:
|
| 731 |
break;
|
| 732 |
} |
| 733 |
} |
| 734 |
return 0; |
| 735 |
} |
| 736 |
|
| 737 |
/* FIXME modify qdm2/svq3/h264 decoders to take full atom as extradata */
|
| 738 |
static int mov_read_extradata(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 739 |
{
|
| 740 |
AVStream *st; |
| 741 |
uint64_t size; |
| 742 |
uint8_t *buf; |
| 743 |
|
| 744 |
if (c->fc->nb_streams < 1) // will happen with jp2 files |
| 745 |
return 0; |
| 746 |
st= c->fc->streams[c->fc->nb_streams-1];
|
| 747 |
size= (uint64_t)st->codec->extradata_size + atom.size + 8 + FF_INPUT_BUFFER_PADDING_SIZE;
|
| 748 |
if(size > INT_MAX || (uint64_t)atom.size > INT_MAX)
|
| 749 |
return -1; |
| 750 |
buf= av_realloc(st->codec->extradata, size); |
| 751 |
if(!buf)
|
| 752 |
return -1; |
| 753 |
st->codec->extradata= buf; |
| 754 |
buf+= st->codec->extradata_size; |
| 755 |
st->codec->extradata_size= size - FF_INPUT_BUFFER_PADDING_SIZE; |
| 756 |
AV_WB32( buf , atom.size + 8);
|
| 757 |
AV_WL32( buf + 4, atom.type);
|
| 758 |
avio_read(pb, buf + 8, atom.size);
|
| 759 |
return 0; |
| 760 |
} |
| 761 |
|
| 762 |
static int mov_read_wave(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 763 |
{
|
| 764 |
AVStream *st; |
| 765 |
|
| 766 |
if (c->fc->nb_streams < 1) |
| 767 |
return 0; |
| 768 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 769 |
|
| 770 |
if((uint64_t)atom.size > (1<<30)) |
| 771 |
return -1; |
| 772 |
|
| 773 |
if (st->codec->codec_id == CODEC_ID_QDM2 || st->codec->codec_id == CODEC_ID_QDMC) {
|
| 774 |
// pass all frma atom to codec, needed at least for QDMC and QDM2
|
| 775 |
av_free(st->codec->extradata); |
| 776 |
st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 777 |
if (!st->codec->extradata)
|
| 778 |
return AVERROR(ENOMEM);
|
| 779 |
st->codec->extradata_size = atom.size; |
| 780 |
avio_read(pb, st->codec->extradata, atom.size); |
| 781 |
} else if (atom.size > 8) { /* to read frma, esds atoms */ |
| 782 |
if (mov_read_default(c, pb, atom) < 0) |
| 783 |
return -1; |
| 784 |
} else
|
| 785 |
avio_seek(pb, atom.size, SEEK_CUR); |
| 786 |
return 0; |
| 787 |
} |
| 788 |
|
| 789 |
/**
|
| 790 |
* This function reads atom content and puts data in extradata without tag
|
| 791 |
* nor size unlike mov_read_extradata.
|
| 792 |
*/
|
| 793 |
static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 794 |
{
|
| 795 |
AVStream *st; |
| 796 |
|
| 797 |
if (c->fc->nb_streams < 1) |
| 798 |
return 0; |
| 799 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 800 |
|
| 801 |
if((uint64_t)atom.size > (1<<30)) |
| 802 |
return -1; |
| 803 |
|
| 804 |
av_free(st->codec->extradata); |
| 805 |
st->codec->extradata = av_mallocz(atom.size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 806 |
if (!st->codec->extradata)
|
| 807 |
return AVERROR(ENOMEM);
|
| 808 |
st->codec->extradata_size = atom.size; |
| 809 |
avio_read(pb, st->codec->extradata, atom.size); |
| 810 |
return 0; |
| 811 |
} |
| 812 |
|
| 813 |
/**
|
| 814 |
* An strf atom is a BITMAPINFOHEADER struct. This struct is 40 bytes itself,
|
| 815 |
* but can have extradata appended at the end after the 40 bytes belonging
|
| 816 |
* to the struct.
|
| 817 |
*/
|
| 818 |
static int mov_read_strf(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 819 |
{
|
| 820 |
AVStream *st; |
| 821 |
|
| 822 |
if (c->fc->nb_streams < 1) |
| 823 |
return 0; |
| 824 |
if (atom.size <= 40) |
| 825 |
return 0; |
| 826 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 827 |
|
| 828 |
if((uint64_t)atom.size > (1<<30)) |
| 829 |
return -1; |
| 830 |
|
| 831 |
av_free(st->codec->extradata); |
| 832 |
st->codec->extradata = av_mallocz(atom.size - 40 + FF_INPUT_BUFFER_PADDING_SIZE);
|
| 833 |
if (!st->codec->extradata)
|
| 834 |
return AVERROR(ENOMEM);
|
| 835 |
st->codec->extradata_size = atom.size - 40;
|
| 836 |
avio_seek(pb, 40, SEEK_CUR);
|
| 837 |
avio_read(pb, st->codec->extradata, atom.size - 40);
|
| 838 |
return 0; |
| 839 |
} |
| 840 |
|
| 841 |
static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 842 |
{
|
| 843 |
AVStream *st; |
| 844 |
MOVStreamContext *sc; |
| 845 |
unsigned int i, entries; |
| 846 |
|
| 847 |
if (c->fc->nb_streams < 1) |
| 848 |
return 0; |
| 849 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 850 |
sc = st->priv_data; |
| 851 |
|
| 852 |
avio_r8(pb); /* version */
|
| 853 |
avio_rb24(pb); /* flags */
|
| 854 |
|
| 855 |
entries = avio_rb32(pb); |
| 856 |
|
| 857 |
if(entries >= UINT_MAX/sizeof(int64_t)) |
| 858 |
return -1; |
| 859 |
|
| 860 |
sc->chunk_offsets = av_malloc(entries * sizeof(int64_t));
|
| 861 |
if (!sc->chunk_offsets)
|
| 862 |
return AVERROR(ENOMEM);
|
| 863 |
sc->chunk_count = entries; |
| 864 |
|
| 865 |
if (atom.type == MKTAG('s','t','c','o')) |
| 866 |
for(i=0; i<entries; i++) |
| 867 |
sc->chunk_offsets[i] = avio_rb32(pb); |
| 868 |
else if (atom.type == MKTAG('c','o','6','4')) |
| 869 |
for(i=0; i<entries; i++) |
| 870 |
sc->chunk_offsets[i] = avio_rb64(pb); |
| 871 |
else
|
| 872 |
return -1; |
| 873 |
|
| 874 |
return 0; |
| 875 |
} |
| 876 |
|
| 877 |
/**
|
| 878 |
* Compute codec id for 'lpcm' tag.
|
| 879 |
* See CoreAudioTypes and AudioStreamBasicDescription at Apple.
|
| 880 |
*/
|
| 881 |
enum CodecID ff_mov_get_lpcm_codec_id(int bps, int flags) |
| 882 |
{
|
| 883 |
if (flags & 1) { // floating point |
| 884 |
if (flags & 2) { // big endian |
| 885 |
if (bps == 32) return CODEC_ID_PCM_F32BE; |
| 886 |
else if (bps == 64) return CODEC_ID_PCM_F64BE; |
| 887 |
} else {
|
| 888 |
if (bps == 32) return CODEC_ID_PCM_F32LE; |
| 889 |
else if (bps == 64) return CODEC_ID_PCM_F64LE; |
| 890 |
} |
| 891 |
} else {
|
| 892 |
if (flags & 2) { |
| 893 |
if (bps == 8) |
| 894 |
// signed integer
|
| 895 |
if (flags & 4) return CODEC_ID_PCM_S8; |
| 896 |
else return CODEC_ID_PCM_U8; |
| 897 |
else if (bps == 16) return CODEC_ID_PCM_S16BE; |
| 898 |
else if (bps == 24) return CODEC_ID_PCM_S24BE; |
| 899 |
else if (bps == 32) return CODEC_ID_PCM_S32BE; |
| 900 |
} else {
|
| 901 |
if (bps == 8) |
| 902 |
if (flags & 4) return CODEC_ID_PCM_S8; |
| 903 |
else return CODEC_ID_PCM_U8; |
| 904 |
else if (bps == 16) return CODEC_ID_PCM_S16LE; |
| 905 |
else if (bps == 24) return CODEC_ID_PCM_S24LE; |
| 906 |
else if (bps == 32) return CODEC_ID_PCM_S32LE; |
| 907 |
} |
| 908 |
} |
| 909 |
return CODEC_ID_NONE;
|
| 910 |
} |
| 911 |
|
| 912 |
int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries) |
| 913 |
{
|
| 914 |
AVStream *st; |
| 915 |
MOVStreamContext *sc; |
| 916 |
int j, pseudo_stream_id;
|
| 917 |
|
| 918 |
if (c->fc->nb_streams < 1) |
| 919 |
return 0; |
| 920 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 921 |
sc = st->priv_data; |
| 922 |
|
| 923 |
for(pseudo_stream_id=0; pseudo_stream_id<entries; pseudo_stream_id++) { |
| 924 |
//Parsing Sample description table
|
| 925 |
enum CodecID id;
|
| 926 |
int dref_id = 1; |
| 927 |
MOVAtom a = { AV_RL32("stsd") };
|
| 928 |
int64_t start_pos = url_ftell(pb); |
| 929 |
int size = avio_rb32(pb); /* size */ |
| 930 |
uint32_t format = avio_rl32(pb); /* data format */
|
| 931 |
|
| 932 |
if (size >= 16) { |
| 933 |
avio_rb32(pb); /* reserved */
|
| 934 |
avio_rb16(pb); /* reserved */
|
| 935 |
dref_id = avio_rb16(pb); |
| 936 |
} |
| 937 |
|
| 938 |
if (st->codec->codec_tag &&
|
| 939 |
st->codec->codec_tag != format && |
| 940 |
(c->fc->video_codec_id ? ff_codec_get_id(codec_movvideo_tags, format) != c->fc->video_codec_id |
| 941 |
: st->codec->codec_tag != MKTAG('j','p','e','g')) |
| 942 |
){
|
| 943 |
/* Multiple fourcc, we skip JPEG. This is not correct, we should
|
| 944 |
* export it as a separate AVStream but this needs a few changes
|
| 945 |
* in the MOV demuxer, patch welcome. */
|
| 946 |
multiple_stsd:
|
| 947 |
av_log(c->fc, AV_LOG_WARNING, "multiple fourcc not supported\n");
|
| 948 |
avio_seek(pb, size - (url_ftell(pb) - start_pos), SEEK_CUR); |
| 949 |
continue;
|
| 950 |
} |
| 951 |
/* we cannot demux concatenated h264 streams because of different extradata */
|
| 952 |
if (st->codec->codec_tag && st->codec->codec_tag == AV_RL32("avc1")) |
| 953 |
goto multiple_stsd;
|
| 954 |
sc->pseudo_stream_id = st->codec->codec_tag ? -1 : pseudo_stream_id;
|
| 955 |
sc->dref_id= dref_id; |
| 956 |
|
| 957 |
st->codec->codec_tag = format; |
| 958 |
id = ff_codec_get_id(codec_movaudio_tags, format); |
| 959 |
if (id<=0 && ((format&0xFFFF) == 'm'+('s'<<8) || (format&0xFFFF) == 'T'+('S'<<8))) |
| 960 |
id = ff_codec_get_id(ff_codec_wav_tags, av_bswap32(format)&0xFFFF);
|
| 961 |
|
| 962 |
if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO && id > 0) { |
| 963 |
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 964 |
} else if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO && /* do not overwrite codec type */ |
| 965 |
format && format != MKTAG('m','p','4','s')) { /* skip old asf mpeg4 tag */ |
| 966 |
id = ff_codec_get_id(codec_movvideo_tags, format); |
| 967 |
if (id <= 0) |
| 968 |
id = ff_codec_get_id(ff_codec_bmp_tags, format); |
| 969 |
if (id > 0) |
| 970 |
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 971 |
else if(st->codec->codec_type == AVMEDIA_TYPE_DATA){ |
| 972 |
id = ff_codec_get_id(ff_codec_movsubtitle_tags, format); |
| 973 |
if(id > 0) |
| 974 |
st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; |
| 975 |
} |
| 976 |
} |
| 977 |
|
| 978 |
av_dlog(c->fc, "size=%d 4CC= %c%c%c%c codec_type=%d\n", size,
|
| 979 |
(format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff, |
| 980 |
(format >> 24) & 0xff, st->codec->codec_type); |
| 981 |
|
| 982 |
if(st->codec->codec_type==AVMEDIA_TYPE_VIDEO) {
|
| 983 |
unsigned int color_depth, len; |
| 984 |
int color_greyscale;
|
| 985 |
|
| 986 |
st->codec->codec_id = id; |
| 987 |
avio_rb16(pb); /* version */
|
| 988 |
avio_rb16(pb); /* revision level */
|
| 989 |
avio_rb32(pb); /* vendor */
|
| 990 |
avio_rb32(pb); /* temporal quality */
|
| 991 |
avio_rb32(pb); /* spatial quality */
|
| 992 |
|
| 993 |
st->codec->width = avio_rb16(pb); /* width */
|
| 994 |
st->codec->height = avio_rb16(pb); /* height */
|
| 995 |
|
| 996 |
avio_rb32(pb); /* horiz resolution */
|
| 997 |
avio_rb32(pb); /* vert resolution */
|
| 998 |
avio_rb32(pb); /* data size, always 0 */
|
| 999 |
avio_rb16(pb); /* frames per samples */
|
| 1000 |
|
| 1001 |
len = avio_r8(pb); /* codec name, pascal string */
|
| 1002 |
if (len > 31) |
| 1003 |
len = 31;
|
| 1004 |
mov_read_mac_string(c, pb, len, st->codec->codec_name, 32);
|
| 1005 |
if (len < 31) |
| 1006 |
avio_seek(pb, 31 - len, SEEK_CUR);
|
| 1007 |
/* codec_tag YV12 triggers an UV swap in rawdec.c */
|
| 1008 |
if (!memcmp(st->codec->codec_name, "Planar Y'CbCr 8-bit 4:2:0", 25)) |
| 1009 |
st->codec->codec_tag=MKTAG('I', '4', '2', '0'); |
| 1010 |
|
| 1011 |
st->codec->bits_per_coded_sample = avio_rb16(pb); /* depth */
|
| 1012 |
st->codec->color_table_id = avio_rb16(pb); /* colortable id */
|
| 1013 |
av_dlog(c->fc, "depth %d, ctab id %d\n",
|
| 1014 |
st->codec->bits_per_coded_sample, st->codec->color_table_id); |
| 1015 |
/* figure out the palette situation */
|
| 1016 |
color_depth = st->codec->bits_per_coded_sample & 0x1F;
|
| 1017 |
color_greyscale = st->codec->bits_per_coded_sample & 0x20;
|
| 1018 |
|
| 1019 |
/* if the depth is 2, 4, or 8 bpp, file is palettized */
|
| 1020 |
if ((color_depth == 2) || (color_depth == 4) || |
| 1021 |
(color_depth == 8)) {
|
| 1022 |
/* for palette traversal */
|
| 1023 |
unsigned int color_start, color_count, color_end; |
| 1024 |
unsigned char r, g, b; |
| 1025 |
|
| 1026 |
st->codec->palctrl = av_malloc(sizeof(*st->codec->palctrl));
|
| 1027 |
if (color_greyscale) {
|
| 1028 |
int color_index, color_dec;
|
| 1029 |
/* compute the greyscale palette */
|
| 1030 |
st->codec->bits_per_coded_sample = color_depth; |
| 1031 |
color_count = 1 << color_depth;
|
| 1032 |
color_index = 255;
|
| 1033 |
color_dec = 256 / (color_count - 1); |
| 1034 |
for (j = 0; j < color_count; j++) { |
| 1035 |
r = g = b = color_index; |
| 1036 |
st->codec->palctrl->palette[j] = |
| 1037 |
(r << 16) | (g << 8) | (b); |
| 1038 |
color_index -= color_dec; |
| 1039 |
if (color_index < 0) |
| 1040 |
color_index = 0;
|
| 1041 |
} |
| 1042 |
} else if (st->codec->color_table_id) { |
| 1043 |
const uint8_t *color_table;
|
| 1044 |
/* if flag bit 3 is set, use the default palette */
|
| 1045 |
color_count = 1 << color_depth;
|
| 1046 |
if (color_depth == 2) |
| 1047 |
color_table = ff_qt_default_palette_4; |
| 1048 |
else if (color_depth == 4) |
| 1049 |
color_table = ff_qt_default_palette_16; |
| 1050 |
else
|
| 1051 |
color_table = ff_qt_default_palette_256; |
| 1052 |
|
| 1053 |
for (j = 0; j < color_count; j++) { |
| 1054 |
r = color_table[j * 3 + 0]; |
| 1055 |
g = color_table[j * 3 + 1]; |
| 1056 |
b = color_table[j * 3 + 2]; |
| 1057 |
st->codec->palctrl->palette[j] = |
| 1058 |
(r << 16) | (g << 8) | (b); |
| 1059 |
} |
| 1060 |
} else {
|
| 1061 |
/* load the palette from the file */
|
| 1062 |
color_start = avio_rb32(pb); |
| 1063 |
color_count = avio_rb16(pb); |
| 1064 |
color_end = avio_rb16(pb); |
| 1065 |
if ((color_start <= 255) && |
| 1066 |
(color_end <= 255)) {
|
| 1067 |
for (j = color_start; j <= color_end; j++) {
|
| 1068 |
/* each R, G, or B component is 16 bits;
|
| 1069 |
* only use the top 8 bits; skip alpha bytes
|
| 1070 |
* up front */
|
| 1071 |
avio_r8(pb); |
| 1072 |
avio_r8(pb); |
| 1073 |
r = avio_r8(pb); |
| 1074 |
avio_r8(pb); |
| 1075 |
g = avio_r8(pb); |
| 1076 |
avio_r8(pb); |
| 1077 |
b = avio_r8(pb); |
| 1078 |
avio_r8(pb); |
| 1079 |
st->codec->palctrl->palette[j] = |
| 1080 |
(r << 16) | (g << 8) | (b); |
| 1081 |
} |
| 1082 |
} |
| 1083 |
} |
| 1084 |
st->codec->palctrl->palette_changed = 1;
|
| 1085 |
} |
| 1086 |
} else if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO) { |
| 1087 |
int bits_per_sample, flags;
|
| 1088 |
uint16_t version = avio_rb16(pb); |
| 1089 |
|
| 1090 |
st->codec->codec_id = id; |
| 1091 |
avio_rb16(pb); /* revision level */
|
| 1092 |
avio_rb32(pb); /* vendor */
|
| 1093 |
|
| 1094 |
st->codec->channels = avio_rb16(pb); /* channel count */
|
| 1095 |
av_dlog(c->fc, "audio channels %d\n", st->codec->channels);
|
| 1096 |
st->codec->bits_per_coded_sample = avio_rb16(pb); /* sample size */
|
| 1097 |
|
| 1098 |
sc->audio_cid = avio_rb16(pb); |
| 1099 |
avio_rb16(pb); /* packet size = 0 */
|
| 1100 |
|
| 1101 |
st->codec->sample_rate = ((avio_rb32(pb) >> 16));
|
| 1102 |
|
| 1103 |
//Read QT version 1 fields. In version 0 these do not exist.
|
| 1104 |
av_dlog(c->fc, "version =%d, isom =%d\n",version,c->isom);
|
| 1105 |
if(!c->isom) {
|
| 1106 |
if(version==1) { |
| 1107 |
sc->samples_per_frame = avio_rb32(pb); |
| 1108 |
avio_rb32(pb); /* bytes per packet */
|
| 1109 |
sc->bytes_per_frame = avio_rb32(pb); |
| 1110 |
avio_rb32(pb); /* bytes per sample */
|
| 1111 |
} else if(version==2) { |
| 1112 |
avio_rb32(pb); /* sizeof struct only */
|
| 1113 |
st->codec->sample_rate = av_int2dbl(avio_rb64(pb)); /* float 64 */
|
| 1114 |
st->codec->channels = avio_rb32(pb); |
| 1115 |
avio_rb32(pb); /* always 0x7F000000 */
|
| 1116 |
st->codec->bits_per_coded_sample = avio_rb32(pb); /* bits per channel if sound is uncompressed */
|
| 1117 |
flags = avio_rb32(pb); /* lpcm format specific flag */
|
| 1118 |
sc->bytes_per_frame = avio_rb32(pb); /* bytes per audio packet if constant */
|
| 1119 |
sc->samples_per_frame = avio_rb32(pb); /* lpcm frames per audio packet if constant */
|
| 1120 |
if (format == MKTAG('l','p','c','m')) |
| 1121 |
st->codec->codec_id = ff_mov_get_lpcm_codec_id(st->codec->bits_per_coded_sample, flags); |
| 1122 |
} |
| 1123 |
} |
| 1124 |
|
| 1125 |
switch (st->codec->codec_id) {
|
| 1126 |
case CODEC_ID_PCM_S8:
|
| 1127 |
case CODEC_ID_PCM_U8:
|
| 1128 |
if (st->codec->bits_per_coded_sample == 16) |
| 1129 |
st->codec->codec_id = CODEC_ID_PCM_S16BE; |
| 1130 |
break;
|
| 1131 |
case CODEC_ID_PCM_S16LE:
|
| 1132 |
case CODEC_ID_PCM_S16BE:
|
| 1133 |
if (st->codec->bits_per_coded_sample == 8) |
| 1134 |
st->codec->codec_id = CODEC_ID_PCM_S8; |
| 1135 |
else if (st->codec->bits_per_coded_sample == 24) |
| 1136 |
st->codec->codec_id = |
| 1137 |
st->codec->codec_id == CODEC_ID_PCM_S16BE ? |
| 1138 |
CODEC_ID_PCM_S24BE : CODEC_ID_PCM_S24LE; |
| 1139 |
break;
|
| 1140 |
/* set values for old format before stsd version 1 appeared */
|
| 1141 |
case CODEC_ID_MACE3:
|
| 1142 |
sc->samples_per_frame = 6;
|
| 1143 |
sc->bytes_per_frame = 2*st->codec->channels;
|
| 1144 |
break;
|
| 1145 |
case CODEC_ID_MACE6:
|
| 1146 |
sc->samples_per_frame = 6;
|
| 1147 |
sc->bytes_per_frame = 1*st->codec->channels;
|
| 1148 |
break;
|
| 1149 |
case CODEC_ID_ADPCM_IMA_QT:
|
| 1150 |
sc->samples_per_frame = 64;
|
| 1151 |
sc->bytes_per_frame = 34*st->codec->channels;
|
| 1152 |
break;
|
| 1153 |
case CODEC_ID_GSM:
|
| 1154 |
sc->samples_per_frame = 160;
|
| 1155 |
sc->bytes_per_frame = 33;
|
| 1156 |
break;
|
| 1157 |
default:
|
| 1158 |
break;
|
| 1159 |
} |
| 1160 |
|
| 1161 |
bits_per_sample = av_get_bits_per_sample(st->codec->codec_id); |
| 1162 |
if (bits_per_sample) {
|
| 1163 |
st->codec->bits_per_coded_sample = bits_per_sample; |
| 1164 |
sc->sample_size = (bits_per_sample >> 3) * st->codec->channels;
|
| 1165 |
} |
| 1166 |
} else if(st->codec->codec_type==AVMEDIA_TYPE_SUBTITLE){ |
| 1167 |
// ttxt stsd contains display flags, justification, background
|
| 1168 |
// color, fonts, and default styles, so fake an atom to read it
|
| 1169 |
MOVAtom fake_atom = { .size = size - (url_ftell(pb) - start_pos) };
|
| 1170 |
if (format != AV_RL32("mp4s")) // mp4s contains a regular esds atom |
| 1171 |
mov_read_glbl(c, pb, fake_atom); |
| 1172 |
st->codec->codec_id= id; |
| 1173 |
st->codec->width = sc->width; |
| 1174 |
st->codec->height = sc->height; |
| 1175 |
} else {
|
| 1176 |
/* other codec type, just skip (rtp, mp4s, tmcd ...) */
|
| 1177 |
avio_seek(pb, size - (url_ftell(pb) - start_pos), SEEK_CUR); |
| 1178 |
} |
| 1179 |
/* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */
|
| 1180 |
a.size = size - (url_ftell(pb) - start_pos); |
| 1181 |
if (a.size > 8) { |
| 1182 |
if (mov_read_default(c, pb, a) < 0) |
| 1183 |
return -1; |
| 1184 |
} else if (a.size > 0) |
| 1185 |
avio_seek(pb, a.size, SEEK_CUR); |
| 1186 |
} |
| 1187 |
|
| 1188 |
if(st->codec->codec_type==AVMEDIA_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) |
| 1189 |
st->codec->sample_rate= sc->time_scale; |
| 1190 |
|
| 1191 |
/* special codec parameters handling */
|
| 1192 |
switch (st->codec->codec_id) {
|
| 1193 |
#if CONFIG_DV_DEMUXER
|
| 1194 |
case CODEC_ID_DVAUDIO:
|
| 1195 |
c->dv_fctx = avformat_alloc_context(); |
| 1196 |
c->dv_demux = dv_init_demux(c->dv_fctx); |
| 1197 |
if (!c->dv_demux) {
|
| 1198 |
av_log(c->fc, AV_LOG_ERROR, "dv demux context init error\n");
|
| 1199 |
return -1; |
| 1200 |
} |
| 1201 |
sc->dv_audio_container = 1;
|
| 1202 |
st->codec->codec_id = CODEC_ID_PCM_S16LE; |
| 1203 |
break;
|
| 1204 |
#endif
|
| 1205 |
/* no ifdef since parameters are always those */
|
| 1206 |
case CODEC_ID_QCELP:
|
| 1207 |
// force sample rate for qcelp when not stored in mov
|
| 1208 |
if (st->codec->codec_tag != MKTAG('Q','c','l','p')) |
| 1209 |
st->codec->sample_rate = 8000;
|
| 1210 |
st->codec->frame_size= 160;
|
| 1211 |
st->codec->channels= 1; /* really needed */ |
| 1212 |
break;
|
| 1213 |
case CODEC_ID_AMR_NB:
|
| 1214 |
case CODEC_ID_AMR_WB:
|
| 1215 |
st->codec->frame_size= sc->samples_per_frame; |
| 1216 |
st->codec->channels= 1; /* really needed */ |
| 1217 |
/* force sample rate for amr, stsd in 3gp does not store sample rate */
|
| 1218 |
if (st->codec->codec_id == CODEC_ID_AMR_NB)
|
| 1219 |
st->codec->sample_rate = 8000;
|
| 1220 |
else if (st->codec->codec_id == CODEC_ID_AMR_WB) |
| 1221 |
st->codec->sample_rate = 16000;
|
| 1222 |
break;
|
| 1223 |
case CODEC_ID_MP2:
|
| 1224 |
case CODEC_ID_MP3:
|
| 1225 |
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; /* force type after stsd for m1a hdlr */
|
| 1226 |
st->need_parsing = AVSTREAM_PARSE_FULL; |
| 1227 |
break;
|
| 1228 |
case CODEC_ID_GSM:
|
| 1229 |
case CODEC_ID_ADPCM_MS:
|
| 1230 |
case CODEC_ID_ADPCM_IMA_WAV:
|
| 1231 |
st->codec->frame_size = sc->samples_per_frame; |
| 1232 |
st->codec->block_align = sc->bytes_per_frame; |
| 1233 |
break;
|
| 1234 |
case CODEC_ID_ALAC:
|
| 1235 |
if (st->codec->extradata_size == 36) { |
| 1236 |
st->codec->frame_size = AV_RB32(st->codec->extradata+12);
|
| 1237 |
st->codec->channels = AV_RB8 (st->codec->extradata+21);
|
| 1238 |
st->codec->sample_rate = AV_RB32(st->codec->extradata+32);
|
| 1239 |
} |
| 1240 |
break;
|
| 1241 |
default:
|
| 1242 |
break;
|
| 1243 |
} |
| 1244 |
|
| 1245 |
return 0; |
| 1246 |
} |
| 1247 |
|
| 1248 |
static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1249 |
{
|
| 1250 |
int entries;
|
| 1251 |
|
| 1252 |
avio_r8(pb); /* version */
|
| 1253 |
avio_rb24(pb); /* flags */
|
| 1254 |
entries = avio_rb32(pb); |
| 1255 |
|
| 1256 |
return ff_mov_read_stsd_entries(c, pb, entries);
|
| 1257 |
} |
| 1258 |
|
| 1259 |
static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1260 |
{
|
| 1261 |
AVStream *st; |
| 1262 |
MOVStreamContext *sc; |
| 1263 |
unsigned int i, entries; |
| 1264 |
|
| 1265 |
if (c->fc->nb_streams < 1) |
| 1266 |
return 0; |
| 1267 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1268 |
sc = st->priv_data; |
| 1269 |
|
| 1270 |
avio_r8(pb); /* version */
|
| 1271 |
avio_rb24(pb); /* flags */
|
| 1272 |
|
| 1273 |
entries = avio_rb32(pb); |
| 1274 |
|
| 1275 |
av_dlog(c->fc, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1276 |
|
| 1277 |
if(entries >= UINT_MAX / sizeof(*sc->stsc_data)) |
| 1278 |
return -1; |
| 1279 |
sc->stsc_data = av_malloc(entries * sizeof(*sc->stsc_data));
|
| 1280 |
if (!sc->stsc_data)
|
| 1281 |
return AVERROR(ENOMEM);
|
| 1282 |
sc->stsc_count = entries; |
| 1283 |
|
| 1284 |
for(i=0; i<entries; i++) { |
| 1285 |
sc->stsc_data[i].first = avio_rb32(pb); |
| 1286 |
sc->stsc_data[i].count = avio_rb32(pb); |
| 1287 |
sc->stsc_data[i].id = avio_rb32(pb); |
| 1288 |
} |
| 1289 |
return 0; |
| 1290 |
} |
| 1291 |
|
| 1292 |
static int mov_read_stps(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1293 |
{
|
| 1294 |
AVStream *st; |
| 1295 |
MOVStreamContext *sc; |
| 1296 |
unsigned i, entries;
|
| 1297 |
|
| 1298 |
if (c->fc->nb_streams < 1) |
| 1299 |
return 0; |
| 1300 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1301 |
sc = st->priv_data; |
| 1302 |
|
| 1303 |
avio_rb32(pb); // version + flags
|
| 1304 |
|
| 1305 |
entries = avio_rb32(pb); |
| 1306 |
if (entries >= UINT_MAX / sizeof(*sc->stps_data)) |
| 1307 |
return -1; |
| 1308 |
sc->stps_data = av_malloc(entries * sizeof(*sc->stps_data));
|
| 1309 |
if (!sc->stps_data)
|
| 1310 |
return AVERROR(ENOMEM);
|
| 1311 |
sc->stps_count = entries; |
| 1312 |
|
| 1313 |
for (i = 0; i < entries; i++) { |
| 1314 |
sc->stps_data[i] = avio_rb32(pb); |
| 1315 |
//av_dlog(c->fc, "stps %d\n", sc->stps_data[i]);
|
| 1316 |
} |
| 1317 |
|
| 1318 |
return 0; |
| 1319 |
} |
| 1320 |
|
| 1321 |
static int mov_read_stss(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1322 |
{
|
| 1323 |
AVStream *st; |
| 1324 |
MOVStreamContext *sc; |
| 1325 |
unsigned int i, entries; |
| 1326 |
|
| 1327 |
if (c->fc->nb_streams < 1) |
| 1328 |
return 0; |
| 1329 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1330 |
sc = st->priv_data; |
| 1331 |
|
| 1332 |
avio_r8(pb); /* version */
|
| 1333 |
avio_rb24(pb); /* flags */
|
| 1334 |
|
| 1335 |
entries = avio_rb32(pb); |
| 1336 |
|
| 1337 |
av_dlog(c->fc, "keyframe_count = %d\n", entries);
|
| 1338 |
|
| 1339 |
if(entries >= UINT_MAX / sizeof(int)) |
| 1340 |
return -1; |
| 1341 |
sc->keyframes = av_malloc(entries * sizeof(int)); |
| 1342 |
if (!sc->keyframes)
|
| 1343 |
return AVERROR(ENOMEM);
|
| 1344 |
sc->keyframe_count = entries; |
| 1345 |
|
| 1346 |
for(i=0; i<entries; i++) { |
| 1347 |
sc->keyframes[i] = avio_rb32(pb); |
| 1348 |
//av_dlog(c->fc, "keyframes[]=%d\n", sc->keyframes[i]);
|
| 1349 |
} |
| 1350 |
return 0; |
| 1351 |
} |
| 1352 |
|
| 1353 |
static int mov_read_stsz(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1354 |
{
|
| 1355 |
AVStream *st; |
| 1356 |
MOVStreamContext *sc; |
| 1357 |
unsigned int i, entries, sample_size, field_size, num_bytes; |
| 1358 |
GetBitContext gb; |
| 1359 |
unsigned char* buf; |
| 1360 |
|
| 1361 |
if (c->fc->nb_streams < 1) |
| 1362 |
return 0; |
| 1363 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1364 |
sc = st->priv_data; |
| 1365 |
|
| 1366 |
avio_r8(pb); /* version */
|
| 1367 |
avio_rb24(pb); /* flags */
|
| 1368 |
|
| 1369 |
if (atom.type == MKTAG('s','t','s','z')) { |
| 1370 |
sample_size = avio_rb32(pb); |
| 1371 |
if (!sc->sample_size) /* do not overwrite value computed in stsd */ |
| 1372 |
sc->sample_size = sample_size; |
| 1373 |
field_size = 32;
|
| 1374 |
} else {
|
| 1375 |
sample_size = 0;
|
| 1376 |
avio_rb24(pb); /* reserved */
|
| 1377 |
field_size = avio_r8(pb); |
| 1378 |
} |
| 1379 |
entries = avio_rb32(pb); |
| 1380 |
|
| 1381 |
av_dlog(c->fc, "sample_size = %d sample_count = %d\n", sc->sample_size, entries);
|
| 1382 |
|
| 1383 |
sc->sample_count = entries; |
| 1384 |
if (sample_size)
|
| 1385 |
return 0; |
| 1386 |
|
| 1387 |
if (field_size != 4 && field_size != 8 && field_size != 16 && field_size != 32) { |
| 1388 |
av_log(c->fc, AV_LOG_ERROR, "Invalid sample field size %d\n", field_size);
|
| 1389 |
return -1; |
| 1390 |
} |
| 1391 |
|
| 1392 |
if (entries >= UINT_MAX / sizeof(int) || entries >= (UINT_MAX - 4) / field_size) |
| 1393 |
return -1; |
| 1394 |
sc->sample_sizes = av_malloc(entries * sizeof(int)); |
| 1395 |
if (!sc->sample_sizes)
|
| 1396 |
return AVERROR(ENOMEM);
|
| 1397 |
|
| 1398 |
num_bytes = (entries*field_size+4)>>3; |
| 1399 |
|
| 1400 |
buf = av_malloc(num_bytes+FF_INPUT_BUFFER_PADDING_SIZE); |
| 1401 |
if (!buf) {
|
| 1402 |
av_freep(&sc->sample_sizes); |
| 1403 |
return AVERROR(ENOMEM);
|
| 1404 |
} |
| 1405 |
|
| 1406 |
if (avio_read(pb, buf, num_bytes) < num_bytes) {
|
| 1407 |
av_freep(&sc->sample_sizes); |
| 1408 |
av_free(buf); |
| 1409 |
return -1; |
| 1410 |
} |
| 1411 |
|
| 1412 |
init_get_bits(&gb, buf, 8*num_bytes);
|
| 1413 |
|
| 1414 |
for(i=0; i<entries; i++) |
| 1415 |
sc->sample_sizes[i] = get_bits_long(&gb, field_size); |
| 1416 |
|
| 1417 |
av_free(buf); |
| 1418 |
return 0; |
| 1419 |
} |
| 1420 |
|
| 1421 |
static int mov_read_stts(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1422 |
{
|
| 1423 |
AVStream *st; |
| 1424 |
MOVStreamContext *sc; |
| 1425 |
unsigned int i, entries; |
| 1426 |
int64_t duration=0;
|
| 1427 |
int64_t total_sample_count=0;
|
| 1428 |
|
| 1429 |
if (c->fc->nb_streams < 1) |
| 1430 |
return 0; |
| 1431 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1432 |
sc = st->priv_data; |
| 1433 |
|
| 1434 |
avio_r8(pb); /* version */
|
| 1435 |
avio_rb24(pb); /* flags */
|
| 1436 |
entries = avio_rb32(pb); |
| 1437 |
|
| 1438 |
av_dlog(c->fc, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1439 |
|
| 1440 |
if(entries >= UINT_MAX / sizeof(*sc->stts_data)) |
| 1441 |
return -1; |
| 1442 |
sc->stts_data = av_malloc(entries * sizeof(*sc->stts_data));
|
| 1443 |
if (!sc->stts_data)
|
| 1444 |
return AVERROR(ENOMEM);
|
| 1445 |
sc->stts_count = entries; |
| 1446 |
|
| 1447 |
for(i=0; i<entries; i++) { |
| 1448 |
int sample_duration;
|
| 1449 |
int sample_count;
|
| 1450 |
|
| 1451 |
sample_count=avio_rb32(pb); |
| 1452 |
sample_duration = avio_rb32(pb); |
| 1453 |
sc->stts_data[i].count= sample_count; |
| 1454 |
sc->stts_data[i].duration= sample_duration; |
| 1455 |
|
| 1456 |
av_dlog(c->fc, "sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);
|
| 1457 |
|
| 1458 |
duration+=(int64_t)sample_duration*sample_count; |
| 1459 |
total_sample_count+=sample_count; |
| 1460 |
} |
| 1461 |
|
| 1462 |
st->nb_frames= total_sample_count; |
| 1463 |
if(duration)
|
| 1464 |
st->duration= duration; |
| 1465 |
return 0; |
| 1466 |
} |
| 1467 |
|
| 1468 |
static int mov_read_ctts(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1469 |
{
|
| 1470 |
AVStream *st; |
| 1471 |
MOVStreamContext *sc; |
| 1472 |
unsigned int i, entries; |
| 1473 |
|
| 1474 |
if (c->fc->nb_streams < 1) |
| 1475 |
return 0; |
| 1476 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1477 |
sc = st->priv_data; |
| 1478 |
|
| 1479 |
avio_r8(pb); /* version */
|
| 1480 |
avio_rb24(pb); /* flags */
|
| 1481 |
entries = avio_rb32(pb); |
| 1482 |
|
| 1483 |
av_dlog(c->fc, "track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries); |
| 1484 |
|
| 1485 |
if(entries >= UINT_MAX / sizeof(*sc->ctts_data)) |
| 1486 |
return -1; |
| 1487 |
sc->ctts_data = av_malloc(entries * sizeof(*sc->ctts_data));
|
| 1488 |
if (!sc->ctts_data)
|
| 1489 |
return AVERROR(ENOMEM);
|
| 1490 |
sc->ctts_count = entries; |
| 1491 |
|
| 1492 |
for(i=0; i<entries; i++) { |
| 1493 |
int count =avio_rb32(pb);
|
| 1494 |
int duration =avio_rb32(pb);
|
| 1495 |
|
| 1496 |
sc->ctts_data[i].count = count; |
| 1497 |
sc->ctts_data[i].duration= duration; |
| 1498 |
if (duration < 0) |
| 1499 |
sc->dts_shift = FFMAX(sc->dts_shift, -duration); |
| 1500 |
} |
| 1501 |
|
| 1502 |
av_dlog(c->fc, "dts shift %d\n", sc->dts_shift);
|
| 1503 |
|
| 1504 |
return 0; |
| 1505 |
} |
| 1506 |
|
| 1507 |
static void mov_build_index(MOVContext *mov, AVStream *st) |
| 1508 |
{
|
| 1509 |
MOVStreamContext *sc = st->priv_data; |
| 1510 |
int64_t current_offset; |
| 1511 |
int64_t current_dts = 0;
|
| 1512 |
unsigned int stts_index = 0; |
| 1513 |
unsigned int stsc_index = 0; |
| 1514 |
unsigned int stss_index = 0; |
| 1515 |
unsigned int stps_index = 0; |
| 1516 |
unsigned int i, j; |
| 1517 |
uint64_t stream_size = 0;
|
| 1518 |
|
| 1519 |
/* adjust first dts according to edit list */
|
| 1520 |
if (sc->time_offset && mov->time_scale > 0) { |
| 1521 |
int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset; |
| 1522 |
current_dts = -rescaled; |
| 1523 |
if (sc->ctts_data && sc->stts_data &&
|
| 1524 |
sc->ctts_data[0].duration / sc->stts_data[0].duration > 16) { |
| 1525 |
/* more than 16 frames delay, dts are likely wrong
|
| 1526 |
this happens with files created by iMovie */
|
| 1527 |
sc->wrong_dts = 1;
|
| 1528 |
st->codec->has_b_frames = 1;
|
| 1529 |
} |
| 1530 |
} |
| 1531 |
|
| 1532 |
/* only use old uncompressed audio chunk demuxing when stts specifies it */
|
| 1533 |
if (!(st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
|
| 1534 |
sc->stts_count == 1 && sc->stts_data[0].duration == 1)) { |
| 1535 |
unsigned int current_sample = 0; |
| 1536 |
unsigned int stts_sample = 0; |
| 1537 |
unsigned int sample_size; |
| 1538 |
unsigned int distance = 0; |
| 1539 |
int key_off = sc->keyframes && sc->keyframes[0] == 1; |
| 1540 |
|
| 1541 |
current_dts -= sc->dts_shift; |
| 1542 |
|
| 1543 |
if (sc->sample_count >= UINT_MAX / sizeof(*st->index_entries)) |
| 1544 |
return;
|
| 1545 |
st->index_entries = av_malloc(sc->sample_count*sizeof(*st->index_entries));
|
| 1546 |
if (!st->index_entries)
|
| 1547 |
return;
|
| 1548 |
st->index_entries_allocated_size = sc->sample_count*sizeof(*st->index_entries);
|
| 1549 |
|
| 1550 |
for (i = 0; i < sc->chunk_count; i++) { |
| 1551 |
current_offset = sc->chunk_offsets[i]; |
| 1552 |
if (stsc_index + 1 < sc->stsc_count && |
| 1553 |
i + 1 == sc->stsc_data[stsc_index + 1].first) |
| 1554 |
stsc_index++; |
| 1555 |
for (j = 0; j < sc->stsc_data[stsc_index].count; j++) { |
| 1556 |
int keyframe = 0; |
| 1557 |
if (current_sample >= sc->sample_count) {
|
| 1558 |
av_log(mov->fc, AV_LOG_ERROR, "wrong sample count\n");
|
| 1559 |
return;
|
| 1560 |
} |
| 1561 |
|
| 1562 |
if (!sc->keyframe_count || current_sample+key_off == sc->keyframes[stss_index]) {
|
| 1563 |
keyframe = 1;
|
| 1564 |
if (stss_index + 1 < sc->keyframe_count) |
| 1565 |
stss_index++; |
| 1566 |
} else if (sc->stps_count && current_sample+key_off == sc->stps_data[stps_index]) { |
| 1567 |
keyframe = 1;
|
| 1568 |
if (stps_index + 1 < sc->stps_count) |
| 1569 |
stps_index++; |
| 1570 |
} |
| 1571 |
if (keyframe)
|
| 1572 |
distance = 0;
|
| 1573 |
sample_size = sc->sample_size > 0 ? sc->sample_size : sc->sample_sizes[current_sample];
|
| 1574 |
if(sc->pseudo_stream_id == -1 || |
| 1575 |
sc->stsc_data[stsc_index].id - 1 == sc->pseudo_stream_id) {
|
| 1576 |
AVIndexEntry *e = &st->index_entries[st->nb_index_entries++]; |
| 1577 |
e->pos = current_offset; |
| 1578 |
e->timestamp = current_dts; |
| 1579 |
e->size = sample_size; |
| 1580 |
e->min_distance = distance; |
| 1581 |
e->flags = keyframe ? AVINDEX_KEYFRAME : 0;
|
| 1582 |
av_dlog(mov->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " |
| 1583 |
"size %d, distance %d, keyframe %d\n", st->index, current_sample,
|
| 1584 |
current_offset, current_dts, sample_size, distance, keyframe); |
| 1585 |
} |
| 1586 |
|
| 1587 |
current_offset += sample_size; |
| 1588 |
stream_size += sample_size; |
| 1589 |
current_dts += sc->stts_data[stts_index].duration; |
| 1590 |
distance++; |
| 1591 |
stts_sample++; |
| 1592 |
current_sample++; |
| 1593 |
if (stts_index + 1 < sc->stts_count && stts_sample == sc->stts_data[stts_index].count) { |
| 1594 |
stts_sample = 0;
|
| 1595 |
stts_index++; |
| 1596 |
} |
| 1597 |
} |
| 1598 |
} |
| 1599 |
if (st->duration > 0) |
| 1600 |
st->codec->bit_rate = stream_size*8*sc->time_scale/st->duration;
|
| 1601 |
} else {
|
| 1602 |
unsigned chunk_samples, total = 0; |
| 1603 |
|
| 1604 |
// compute total chunk count
|
| 1605 |
for (i = 0; i < sc->stsc_count; i++) { |
| 1606 |
unsigned count, chunk_count;
|
| 1607 |
|
| 1608 |
chunk_samples = sc->stsc_data[i].count; |
| 1609 |
if (sc->samples_per_frame && chunk_samples % sc->samples_per_frame) {
|
| 1610 |
av_log(mov->fc, AV_LOG_ERROR, "error unaligned chunk\n");
|
| 1611 |
return;
|
| 1612 |
} |
| 1613 |
|
| 1614 |
if (sc->samples_per_frame >= 160) { // gsm |
| 1615 |
count = chunk_samples / sc->samples_per_frame; |
| 1616 |
} else if (sc->samples_per_frame > 1) { |
| 1617 |
unsigned samples = (1024/sc->samples_per_frame)*sc->samples_per_frame; |
| 1618 |
count = (chunk_samples+samples-1) / samples;
|
| 1619 |
} else {
|
| 1620 |
count = (chunk_samples+1023) / 1024; |
| 1621 |
} |
| 1622 |
|
| 1623 |
if (i < sc->stsc_count - 1) |
| 1624 |
chunk_count = sc->stsc_data[i+1].first - sc->stsc_data[i].first;
|
| 1625 |
else
|
| 1626 |
chunk_count = sc->chunk_count - (sc->stsc_data[i].first - 1);
|
| 1627 |
total += chunk_count * count; |
| 1628 |
} |
| 1629 |
|
| 1630 |
av_dlog(mov->fc, "chunk count %d\n", total);
|
| 1631 |
if (total >= UINT_MAX / sizeof(*st->index_entries)) |
| 1632 |
return;
|
| 1633 |
st->index_entries = av_malloc(total*sizeof(*st->index_entries));
|
| 1634 |
if (!st->index_entries)
|
| 1635 |
return;
|
| 1636 |
st->index_entries_allocated_size = total*sizeof(*st->index_entries);
|
| 1637 |
|
| 1638 |
// populate index
|
| 1639 |
for (i = 0; i < sc->chunk_count; i++) { |
| 1640 |
current_offset = sc->chunk_offsets[i]; |
| 1641 |
if (stsc_index + 1 < sc->stsc_count && |
| 1642 |
i + 1 == sc->stsc_data[stsc_index + 1].first) |
| 1643 |
stsc_index++; |
| 1644 |
chunk_samples = sc->stsc_data[stsc_index].count; |
| 1645 |
|
| 1646 |
while (chunk_samples > 0) { |
| 1647 |
AVIndexEntry *e; |
| 1648 |
unsigned size, samples;
|
| 1649 |
|
| 1650 |
if (sc->samples_per_frame >= 160) { // gsm |
| 1651 |
samples = sc->samples_per_frame; |
| 1652 |
size = sc->bytes_per_frame; |
| 1653 |
} else {
|
| 1654 |
if (sc->samples_per_frame > 1) { |
| 1655 |
samples = FFMIN((1024 / sc->samples_per_frame)*
|
| 1656 |
sc->samples_per_frame, chunk_samples); |
| 1657 |
size = (samples / sc->samples_per_frame) * sc->bytes_per_frame; |
| 1658 |
} else {
|
| 1659 |
samples = FFMIN(1024, chunk_samples);
|
| 1660 |
size = samples * sc->sample_size; |
| 1661 |
} |
| 1662 |
} |
| 1663 |
|
| 1664 |
if (st->nb_index_entries >= total) {
|
| 1665 |
av_log(mov->fc, AV_LOG_ERROR, "wrong chunk count %d\n", total);
|
| 1666 |
return;
|
| 1667 |
} |
| 1668 |
e = &st->index_entries[st->nb_index_entries++]; |
| 1669 |
e->pos = current_offset; |
| 1670 |
e->timestamp = current_dts; |
| 1671 |
e->size = size; |
| 1672 |
e->min_distance = 0;
|
| 1673 |
e->flags = AVINDEX_KEYFRAME; |
| 1674 |
av_dlog(mov->fc, "AVIndex stream %d, chunk %d, offset %"PRIx64", dts %"PRId64", " |
| 1675 |
"size %d, duration %d\n", st->index, i, current_offset, current_dts,
|
| 1676 |
size, samples); |
| 1677 |
|
| 1678 |
current_offset += size; |
| 1679 |
current_dts += samples; |
| 1680 |
chunk_samples -= samples; |
| 1681 |
} |
| 1682 |
} |
| 1683 |
} |
| 1684 |
} |
| 1685 |
|
| 1686 |
static int mov_open_dref(AVIOContext **pb, char *src, MOVDref *ref) |
| 1687 |
{
|
| 1688 |
/* try relative path, we do not try the absolute because it can leak information about our
|
| 1689 |
system to an attacker */
|
| 1690 |
if (ref->nlvl_to > 0 && ref->nlvl_from > 0) { |
| 1691 |
char filename[1024]; |
| 1692 |
char *src_path;
|
| 1693 |
int i, l;
|
| 1694 |
|
| 1695 |
/* find a source dir */
|
| 1696 |
src_path = strrchr(src, '/');
|
| 1697 |
if (src_path)
|
| 1698 |
src_path++; |
| 1699 |
else
|
| 1700 |
src_path = src; |
| 1701 |
|
| 1702 |
/* find a next level down to target */
|
| 1703 |
for (i = 0, l = strlen(ref->path) - 1; l >= 0; l--) |
| 1704 |
if (ref->path[l] == '/') { |
| 1705 |
if (i == ref->nlvl_to - 1) |
| 1706 |
break;
|
| 1707 |
else
|
| 1708 |
i++; |
| 1709 |
} |
| 1710 |
|
| 1711 |
/* compose filename if next level down to target was found */
|
| 1712 |
if (i == ref->nlvl_to - 1 && src_path - src < sizeof(filename)) { |
| 1713 |
memcpy(filename, src, src_path - src); |
| 1714 |
filename[src_path - src] = 0;
|
| 1715 |
|
| 1716 |
for (i = 1; i < ref->nlvl_from; i++) |
| 1717 |
av_strlcat(filename, "../", 1024); |
| 1718 |
|
| 1719 |
av_strlcat(filename, ref->path + l + 1, 1024); |
| 1720 |
|
| 1721 |
if (!avio_open(pb, filename, URL_RDONLY))
|
| 1722 |
return 0; |
| 1723 |
} |
| 1724 |
} |
| 1725 |
|
| 1726 |
return AVERROR(ENOENT);
|
| 1727 |
} |
| 1728 |
|
| 1729 |
static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1730 |
{
|
| 1731 |
AVStream *st; |
| 1732 |
MOVStreamContext *sc; |
| 1733 |
int ret;
|
| 1734 |
|
| 1735 |
st = av_new_stream(c->fc, c->fc->nb_streams); |
| 1736 |
if (!st) return AVERROR(ENOMEM); |
| 1737 |
sc = av_mallocz(sizeof(MOVStreamContext));
|
| 1738 |
if (!sc) return AVERROR(ENOMEM); |
| 1739 |
|
| 1740 |
st->priv_data = sc; |
| 1741 |
st->codec->codec_type = AVMEDIA_TYPE_DATA; |
| 1742 |
sc->ffindex = st->index; |
| 1743 |
|
| 1744 |
if ((ret = mov_read_default(c, pb, atom)) < 0) |
| 1745 |
return ret;
|
| 1746 |
|
| 1747 |
/* sanity checks */
|
| 1748 |
if (sc->chunk_count && (!sc->stts_count || !sc->stsc_count ||
|
| 1749 |
(!sc->sample_size && !sc->sample_count))) {
|
| 1750 |
av_log(c->fc, AV_LOG_ERROR, "stream %d, missing mandatory atoms, broken header\n",
|
| 1751 |
st->index); |
| 1752 |
return 0; |
| 1753 |
} |
| 1754 |
|
| 1755 |
if (sc->time_scale <= 0) { |
| 1756 |
av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
|
| 1757 |
sc->time_scale = c->time_scale; |
| 1758 |
if (sc->time_scale <= 0) |
| 1759 |
sc->time_scale = 1;
|
| 1760 |
} |
| 1761 |
|
| 1762 |
av_set_pts_info(st, 64, 1, sc->time_scale); |
| 1763 |
|
| 1764 |
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
|
| 1765 |
!st->codec->frame_size && sc->stts_count == 1) {
|
| 1766 |
st->codec->frame_size = av_rescale(sc->stts_data[0].duration,
|
| 1767 |
st->codec->sample_rate, sc->time_scale); |
| 1768 |
av_dlog(c->fc, "frame size %d\n", st->codec->frame_size);
|
| 1769 |
} |
| 1770 |
|
| 1771 |
mov_build_index(c, st); |
| 1772 |
|
| 1773 |
if (sc->dref_id-1 < sc->drefs_count && sc->drefs[sc->dref_id-1].path) { |
| 1774 |
MOVDref *dref = &sc->drefs[sc->dref_id - 1];
|
| 1775 |
if (mov_open_dref(&sc->pb, c->fc->filename, dref) < 0) |
| 1776 |
av_log(c->fc, AV_LOG_ERROR, |
| 1777 |
"stream %d, error opening alias: path='%s', dir='%s', "
|
| 1778 |
"filename='%s', volume='%s', nlvl_from=%d, nlvl_to=%d\n",
|
| 1779 |
st->index, dref->path, dref->dir, dref->filename, |
| 1780 |
dref->volume, dref->nlvl_from, dref->nlvl_to); |
| 1781 |
} else
|
| 1782 |
sc->pb = c->fc->pb; |
| 1783 |
|
| 1784 |
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
| 1785 |
if (!st->sample_aspect_ratio.num &&
|
| 1786 |
(st->codec->width != sc->width || st->codec->height != sc->height)) {
|
| 1787 |
st->sample_aspect_ratio = av_d2q(((double)st->codec->height * sc->width) /
|
| 1788 |
((double)st->codec->width * sc->height), INT_MAX);
|
| 1789 |
} |
| 1790 |
|
| 1791 |
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
| 1792 |
sc->time_scale*st->nb_frames, st->duration, INT_MAX); |
| 1793 |
|
| 1794 |
if (sc->stts_count == 1 || (sc->stts_count == 2 && sc->stts_data[1].count == 1)) |
| 1795 |
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, |
| 1796 |
sc->time_scale, sc->stts_data[0].duration, INT_MAX);
|
| 1797 |
} |
| 1798 |
|
| 1799 |
switch (st->codec->codec_id) {
|
| 1800 |
#if CONFIG_H261_DECODER
|
| 1801 |
case CODEC_ID_H261:
|
| 1802 |
#endif
|
| 1803 |
#if CONFIG_H263_DECODER
|
| 1804 |
case CODEC_ID_H263:
|
| 1805 |
#endif
|
| 1806 |
#if CONFIG_H264_DECODER
|
| 1807 |
case CODEC_ID_H264:
|
| 1808 |
#endif
|
| 1809 |
#if CONFIG_MPEG4_DECODER
|
| 1810 |
case CODEC_ID_MPEG4:
|
| 1811 |
#endif
|
| 1812 |
st->codec->width = 0; /* let decoder init width/height */ |
| 1813 |
st->codec->height= 0;
|
| 1814 |
break;
|
| 1815 |
} |
| 1816 |
|
| 1817 |
/* Do not need those anymore. */
|
| 1818 |
av_freep(&sc->chunk_offsets); |
| 1819 |
av_freep(&sc->stsc_data); |
| 1820 |
av_freep(&sc->sample_sizes); |
| 1821 |
av_freep(&sc->keyframes); |
| 1822 |
av_freep(&sc->stts_data); |
| 1823 |
av_freep(&sc->stps_data); |
| 1824 |
|
| 1825 |
return 0; |
| 1826 |
} |
| 1827 |
|
| 1828 |
static int mov_read_ilst(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1829 |
{
|
| 1830 |
int ret;
|
| 1831 |
c->itunes_metadata = 1;
|
| 1832 |
ret = mov_read_default(c, pb, atom); |
| 1833 |
c->itunes_metadata = 0;
|
| 1834 |
return ret;
|
| 1835 |
} |
| 1836 |
|
| 1837 |
static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1838 |
{
|
| 1839 |
while (atom.size > 8) { |
| 1840 |
uint32_t tag = avio_rl32(pb); |
| 1841 |
atom.size -= 4;
|
| 1842 |
if (tag == MKTAG('h','d','l','r')) { |
| 1843 |
avio_seek(pb, -8, SEEK_CUR);
|
| 1844 |
atom.size += 8;
|
| 1845 |
return mov_read_default(c, pb, atom);
|
| 1846 |
} |
| 1847 |
} |
| 1848 |
return 0; |
| 1849 |
} |
| 1850 |
|
| 1851 |
static int mov_read_tkhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1852 |
{
|
| 1853 |
int i;
|
| 1854 |
int width;
|
| 1855 |
int height;
|
| 1856 |
int64_t disp_transform[2];
|
| 1857 |
int display_matrix[3][2]; |
| 1858 |
AVStream *st; |
| 1859 |
MOVStreamContext *sc; |
| 1860 |
int version;
|
| 1861 |
|
| 1862 |
if (c->fc->nb_streams < 1) |
| 1863 |
return 0; |
| 1864 |
st = c->fc->streams[c->fc->nb_streams-1];
|
| 1865 |
sc = st->priv_data; |
| 1866 |
|
| 1867 |
version = avio_r8(pb); |
| 1868 |
avio_rb24(pb); /* flags */
|
| 1869 |
/*
|
| 1870 |
MOV_TRACK_ENABLED 0x0001
|
| 1871 |
MOV_TRACK_IN_MOVIE 0x0002
|
| 1872 |
MOV_TRACK_IN_PREVIEW 0x0004
|
| 1873 |
MOV_TRACK_IN_POSTER 0x0008
|
| 1874 |
*/
|
| 1875 |
|
| 1876 |
if (version == 1) { |
| 1877 |
avio_rb64(pb); |
| 1878 |
avio_rb64(pb); |
| 1879 |
} else {
|
| 1880 |
avio_rb32(pb); /* creation time */
|
| 1881 |
avio_rb32(pb); /* modification time */
|
| 1882 |
} |
| 1883 |
st->id = (int)avio_rb32(pb); /* track id (NOT 0 !)*/ |
| 1884 |
avio_rb32(pb); /* reserved */
|
| 1885 |
|
| 1886 |
/* highlevel (considering edits) duration in movie timebase */
|
| 1887 |
(version == 1) ? avio_rb64(pb) : avio_rb32(pb);
|
| 1888 |
avio_rb32(pb); /* reserved */
|
| 1889 |
avio_rb32(pb); /* reserved */
|
| 1890 |
|
| 1891 |
avio_rb16(pb); /* layer */
|
| 1892 |
avio_rb16(pb); /* alternate group */
|
| 1893 |
avio_rb16(pb); /* volume */
|
| 1894 |
avio_rb16(pb); /* reserved */
|
| 1895 |
|
| 1896 |
//read in the display matrix (outlined in ISO 14496-12, Section 6.2.2)
|
| 1897 |
// they're kept in fixed point format through all calculations
|
| 1898 |
// ignore u,v,z b/c we don't need the scale factor to calc aspect ratio
|
| 1899 |
for (i = 0; i < 3; i++) { |
| 1900 |
display_matrix[i][0] = avio_rb32(pb); // 16.16 fixed point |
| 1901 |
display_matrix[i][1] = avio_rb32(pb); // 16.16 fixed point |
| 1902 |
avio_rb32(pb); // 2.30 fixed point (not used)
|
| 1903 |
} |
| 1904 |
|
| 1905 |
width = avio_rb32(pb); // 16.16 fixed point track width
|
| 1906 |
height = avio_rb32(pb); // 16.16 fixed point track height
|
| 1907 |
sc->width = width >> 16;
|
| 1908 |
sc->height = height >> 16;
|
| 1909 |
|
| 1910 |
// transform the display width/height according to the matrix
|
| 1911 |
// skip this if the display matrix is the default identity matrix
|
| 1912 |
// or if it is rotating the picture, ex iPhone 3GS
|
| 1913 |
// to keep the same scale, use [width height 1<<16]
|
| 1914 |
if (width && height &&
|
| 1915 |
((display_matrix[0][0] != 65536 || |
| 1916 |
display_matrix[1][1] != 65536) && |
| 1917 |
!display_matrix[0][1] && |
| 1918 |
!display_matrix[1][0] && |
| 1919 |
!display_matrix[2][0] && !display_matrix[2][1])) { |
| 1920 |
for (i = 0; i < 2; i++) |
| 1921 |
disp_transform[i] = |
| 1922 |
(int64_t) width * display_matrix[0][i] +
|
| 1923 |
(int64_t) height * display_matrix[1][i] +
|
| 1924 |
((int64_t) display_matrix[2][i] << 16); |
| 1925 |
|
| 1926 |
//sample aspect ratio is new width/height divided by old width/height
|
| 1927 |
st->sample_aspect_ratio = av_d2q( |
| 1928 |
((double) disp_transform[0] * height) / |
| 1929 |
((double) disp_transform[1] * width), INT_MAX); |
| 1930 |
} |
| 1931 |
return 0; |
| 1932 |
} |
| 1933 |
|
| 1934 |
static int mov_read_tfhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1935 |
{
|
| 1936 |
MOVFragment *frag = &c->fragment; |
| 1937 |
MOVTrackExt *trex = NULL;
|
| 1938 |
int flags, track_id, i;
|
| 1939 |
|
| 1940 |
avio_r8(pb); /* version */
|
| 1941 |
flags = avio_rb24(pb); |
| 1942 |
|
| 1943 |
track_id = avio_rb32(pb); |
| 1944 |
if (!track_id)
|
| 1945 |
return -1; |
| 1946 |
frag->track_id = track_id; |
| 1947 |
for (i = 0; i < c->trex_count; i++) |
| 1948 |
if (c->trex_data[i].track_id == frag->track_id) {
|
| 1949 |
trex = &c->trex_data[i]; |
| 1950 |
break;
|
| 1951 |
} |
| 1952 |
if (!trex) {
|
| 1953 |
av_log(c->fc, AV_LOG_ERROR, "could not find corresponding trex\n");
|
| 1954 |
return -1; |
| 1955 |
} |
| 1956 |
|
| 1957 |
if (flags & 0x01) frag->base_data_offset = avio_rb64(pb); |
| 1958 |
else frag->base_data_offset = frag->moof_offset;
|
| 1959 |
if (flags & 0x02) frag->stsd_id = avio_rb32(pb); |
| 1960 |
else frag->stsd_id = trex->stsd_id;
|
| 1961 |
|
| 1962 |
frag->duration = flags & 0x08 ? avio_rb32(pb) : trex->duration;
|
| 1963 |
frag->size = flags & 0x10 ? avio_rb32(pb) : trex->size;
|
| 1964 |
frag->flags = flags & 0x20 ? avio_rb32(pb) : trex->flags;
|
| 1965 |
av_dlog(c->fc, "frag flags 0x%x\n", frag->flags);
|
| 1966 |
return 0; |
| 1967 |
} |
| 1968 |
|
| 1969 |
static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1970 |
{
|
| 1971 |
c->chapter_track = avio_rb32(pb); |
| 1972 |
return 0; |
| 1973 |
} |
| 1974 |
|
| 1975 |
static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1976 |
{
|
| 1977 |
MOVTrackExt *trex; |
| 1978 |
|
| 1979 |
if ((uint64_t)c->trex_count+1 >= UINT_MAX / sizeof(*c->trex_data)) |
| 1980 |
return -1; |
| 1981 |
trex = av_realloc(c->trex_data, (c->trex_count+1)*sizeof(*c->trex_data)); |
| 1982 |
if (!trex)
|
| 1983 |
return AVERROR(ENOMEM);
|
| 1984 |
c->trex_data = trex; |
| 1985 |
trex = &c->trex_data[c->trex_count++]; |
| 1986 |
avio_r8(pb); /* version */
|
| 1987 |
avio_rb24(pb); /* flags */
|
| 1988 |
trex->track_id = avio_rb32(pb); |
| 1989 |
trex->stsd_id = avio_rb32(pb); |
| 1990 |
trex->duration = avio_rb32(pb); |
| 1991 |
trex->size = avio_rb32(pb); |
| 1992 |
trex->flags = avio_rb32(pb); |
| 1993 |
return 0; |
| 1994 |
} |
| 1995 |
|
| 1996 |
static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 1997 |
{
|
| 1998 |
MOVFragment *frag = &c->fragment; |
| 1999 |
AVStream *st = NULL;
|
| 2000 |
MOVStreamContext *sc; |
| 2001 |
uint64_t offset; |
| 2002 |
int64_t dts; |
| 2003 |
int data_offset = 0; |
| 2004 |
unsigned entries, first_sample_flags = frag->flags;
|
| 2005 |
int flags, distance, i;
|
| 2006 |
|
| 2007 |
for (i = 0; i < c->fc->nb_streams; i++) { |
| 2008 |
if (c->fc->streams[i]->id == frag->track_id) {
|
| 2009 |
st = c->fc->streams[i]; |
| 2010 |
break;
|
| 2011 |
} |
| 2012 |
} |
| 2013 |
if (!st) {
|
| 2014 |
av_log(c->fc, AV_LOG_ERROR, "could not find corresponding track id %d\n", frag->track_id);
|
| 2015 |
return -1; |
| 2016 |
} |
| 2017 |
sc = st->priv_data; |
| 2018 |
if (sc->pseudo_stream_id+1 != frag->stsd_id) |
| 2019 |
return 0; |
| 2020 |
avio_r8(pb); /* version */
|
| 2021 |
flags = avio_rb24(pb); |
| 2022 |
entries = avio_rb32(pb); |
| 2023 |
av_dlog(c->fc, "flags 0x%x entries %d\n", flags, entries);
|
| 2024 |
if (flags & 0x001) data_offset = avio_rb32(pb); |
| 2025 |
if (flags & 0x004) first_sample_flags = avio_rb32(pb); |
| 2026 |
if (flags & 0x800) { |
| 2027 |
MOVStts *ctts_data; |
| 2028 |
if ((uint64_t)entries+sc->ctts_count >= UINT_MAX/sizeof(*sc->ctts_data)) |
| 2029 |
return -1; |
| 2030 |
ctts_data = av_realloc(sc->ctts_data, |
| 2031 |
(entries+sc->ctts_count)*sizeof(*sc->ctts_data));
|
| 2032 |
if (!ctts_data)
|
| 2033 |
return AVERROR(ENOMEM);
|
| 2034 |
sc->ctts_data = ctts_data; |
| 2035 |
} |
| 2036 |
dts = st->duration; |
| 2037 |
offset = frag->base_data_offset + data_offset; |
| 2038 |
distance = 0;
|
| 2039 |
av_dlog(c->fc, "first sample flags 0x%x\n", first_sample_flags);
|
| 2040 |
for (i = 0; i < entries; i++) { |
| 2041 |
unsigned sample_size = frag->size;
|
| 2042 |
int sample_flags = i ? frag->flags : first_sample_flags;
|
| 2043 |
unsigned sample_duration = frag->duration;
|
| 2044 |
int keyframe;
|
| 2045 |
|
| 2046 |
if (flags & 0x100) sample_duration = avio_rb32(pb); |
| 2047 |
if (flags & 0x200) sample_size = avio_rb32(pb); |
| 2048 |
if (flags & 0x400) sample_flags = avio_rb32(pb); |
| 2049 |
if (flags & 0x800) { |
| 2050 |
sc->ctts_data[sc->ctts_count].count = 1;
|
| 2051 |
sc->ctts_data[sc->ctts_count].duration = avio_rb32(pb); |
| 2052 |
sc->ctts_count++; |
| 2053 |
} |
| 2054 |
if ((keyframe = st->codec->codec_type == AVMEDIA_TYPE_AUDIO ||
|
| 2055 |
(flags & 0x004 && !i && !sample_flags) || sample_flags & 0x2000000)) |
| 2056 |
distance = 0;
|
| 2057 |
av_add_index_entry(st, offset, dts, sample_size, distance, |
| 2058 |
keyframe ? AVINDEX_KEYFRAME : 0);
|
| 2059 |
av_dlog(c->fc, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", " |
| 2060 |
"size %d, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
|
| 2061 |
offset, dts, sample_size, distance, keyframe); |
| 2062 |
distance++; |
| 2063 |
dts += sample_duration; |
| 2064 |
offset += sample_size; |
| 2065 |
} |
| 2066 |
frag->moof_offset = offset; |
| 2067 |
st->duration = dts; |
| 2068 |
return 0; |
| 2069 |
} |
| 2070 |
|
| 2071 |
/* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */
|
| 2072 |
/* like the files created with Adobe Premiere 5.0, for samples see */
|
| 2073 |
/* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */
|
| 2074 |
static int mov_read_wide(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 2075 |
{
|
| 2076 |
int err;
|
| 2077 |
|
| 2078 |
if (atom.size < 8) |
| 2079 |
return 0; /* continue */ |
| 2080 |
if (avio_rb32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */ |
| 2081 |
avio_seek(pb, atom.size - 4, SEEK_CUR);
|
| 2082 |
return 0; |
| 2083 |
} |
| 2084 |
atom.type = avio_rl32(pb); |
| 2085 |
atom.size -= 8;
|
| 2086 |
if (atom.type != MKTAG('m','d','a','t')) { |
| 2087 |
avio_seek(pb, atom.size, SEEK_CUR); |
| 2088 |
return 0; |
| 2089 |
} |
| 2090 |
err = mov_read_mdat(c, pb, atom); |
| 2091 |
return err;
|
| 2092 |
} |
| 2093 |
|
| 2094 |
static int mov_read_cmov(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 2095 |
{
|
| 2096 |
#if CONFIG_ZLIB
|
| 2097 |
AVIOContext ctx; |
| 2098 |
uint8_t *cmov_data; |
| 2099 |
uint8_t *moov_data; /* uncompressed data */
|
| 2100 |
long cmov_len, moov_len;
|
| 2101 |
int ret = -1; |
| 2102 |
|
| 2103 |
avio_rb32(pb); /* dcom atom */
|
| 2104 |
if (avio_rl32(pb) != MKTAG('d','c','o','m')) |
| 2105 |
return -1; |
| 2106 |
if (avio_rl32(pb) != MKTAG('z','l','i','b')) { |
| 2107 |
av_log(c->fc, AV_LOG_ERROR, "unknown compression for cmov atom !");
|
| 2108 |
return -1; |
| 2109 |
} |
| 2110 |
avio_rb32(pb); /* cmvd atom */
|
| 2111 |
if (avio_rl32(pb) != MKTAG('c','m','v','d')) |
| 2112 |
return -1; |
| 2113 |
moov_len = avio_rb32(pb); /* uncompressed size */
|
| 2114 |
cmov_len = atom.size - 6 * 4; |
| 2115 |
|
| 2116 |
cmov_data = av_malloc(cmov_len); |
| 2117 |
if (!cmov_data)
|
| 2118 |
return AVERROR(ENOMEM);
|
| 2119 |
moov_data = av_malloc(moov_len); |
| 2120 |
if (!moov_data) {
|
| 2121 |
av_free(cmov_data); |
| 2122 |
return AVERROR(ENOMEM);
|
| 2123 |
} |
| 2124 |
avio_read(pb, cmov_data, cmov_len); |
| 2125 |
if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK) |
| 2126 |
goto free_and_return;
|
| 2127 |
if(ffio_init_context(&ctx, moov_data, moov_len, 0, NULL, NULL, NULL, NULL) != 0) |
| 2128 |
goto free_and_return;
|
| 2129 |
atom.type = MKTAG('m','o','o','v'); |
| 2130 |
atom.size = moov_len; |
| 2131 |
#ifdef DEBUG
|
| 2132 |
// { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }
|
| 2133 |
#endif
|
| 2134 |
ret = mov_read_default(c, &ctx, atom); |
| 2135 |
free_and_return:
|
| 2136 |
av_free(moov_data); |
| 2137 |
av_free(cmov_data); |
| 2138 |
return ret;
|
| 2139 |
#else
|
| 2140 |
av_log(c->fc, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
|
| 2141 |
return -1; |
| 2142 |
#endif
|
| 2143 |
} |
| 2144 |
|
| 2145 |
/* edit list atom */
|
| 2146 |
static int mov_read_elst(MOVContext *c, AVIOContext *pb, MOVAtom atom) |
| 2147 |
{
|
| 2148 |
MOVStreamContext *sc; |
| 2149 |
int i, edit_count;
|
| 2150 |
|
| 2151 |
if (c->fc->nb_streams < 1) |
| 2152 |
return 0; |
| 2153 |
sc = c->fc->streams[c->fc->nb_streams-1]->priv_data;
|
| 2154 |
|
| 2155 |
avio_r8(pb); /* version */
|
| 2156 |
avio_rb24(pb); /* flags */
|
| 2157 |
edit_count = avio_rb32(pb); /* entries */
|
| 2158 |
|
| 2159 |
if((uint64_t)edit_count*12+8 > atom.size) |
| 2160 |
return -1; |
| 2161 |
|
| 2162 |
for(i=0; i<edit_count; i++){ |
| 2163 |
int time;
|
| 2164 |
int duration = avio_rb32(pb); /* Track duration */ |
| 2165 |
time = avio_rb32(pb); /* Media time */
|
| 2166 |
avio_rb32(pb); /* Media rate */
|
| 2167 |
if (i == 0 && time >= -1) { |
| 2168 |
sc->time_offset = time != -1 ? time : -duration;
|
| 2169 |
} |
| 2170 |
} |
| 2171 |
|
| 2172 |
if(edit_count > 1) |
| 2173 |
av_log(c->fc, AV_LOG_WARNING, "multiple edit list entries, "
|
| 2174 |
"a/v desync might occur, patch welcome\n");
|
| 2175 |
|
| 2176 |
av_dlog(c->fc, "track[%i].edit_count = %i\n", c->fc->nb_streams-1, edit_count); |
| 2177 |
return 0; |
| 2178 |
} |
| 2179 |
|
| 2180 |
static const MOVParseTableEntry mov_default_parse_table[] = { |
| 2181 |
{ MKTAG('a','v','s','s'), mov_read_extradata },
|
| 2182 |
{ MKTAG('c','h','p','l'), mov_read_chpl },
|
| 2183 |
{ MKTAG('c','o','6','4'), mov_read_stco },
|
| 2184 |
{ MKTAG('c','t','t','s'), mov_read_ctts }, /* composition time to sample */
|
| 2185 |
{ MKTAG('d','i','n','f'), mov_read_default },
|
| 2186 |
{ MKTAG('d','r','e','f'), mov_read_dref },
|
| 2187 |
{ MKTAG('e','d','t','s'), mov_read_default },
|
| 2188 |
{ MKTAG('e','l','s','t'), mov_read_elst },
|
| 2189 |
{ MKTAG('e','n','d','a'), mov_read_enda },
|
| 2190 |
{ MKTAG('f','i','e','l'), mov_read_extradata },
|
| 2191 |
{ MKTAG('f','t','y','p'), mov_read_ftyp },
|
| 2192 |
{ MKTAG('g','l','b','l'), mov_read_glbl },
|
| 2193 |
{ MKTAG('h','d','l','r'), mov_read_hdlr },
|
| 2194 |
{ MKTAG('i','l','s','t'), mov_read_ilst },
|
| 2195 |
{ MKTAG('j','p','2','h'), mov_read_extradata },
|
| 2196 |
{ MKTAG('m','d','a','t'), mov_read_mdat },
|
| 2197 |
{ MKTAG('m','d','h','d'), mov_read_mdhd },
|
| 2198 |
{ MKTAG('m','d','i','a'), mov_read_default },
|
| 2199 |
{ MKTAG('m','e','t','a'), mov_read_meta },
|
| 2200 |
{ MKTAG('m','i','n','f'), mov_read_default },
|
| 2201 |
{ MKTAG('m','o','o','f'), mov_read_moof },
|
| 2202 |
{ MKTAG('m','o','o','v'), mov_read_moov },
|
| 2203 |
{ MKTAG('m','v','e','x'), mov_read_default },
|
| 2204 |
{ MKTAG('m','v','h','d'), mov_read_mvhd },
|
| 2205 |
{ MKTAG('S','M','I',' '), mov_read_smi }, /* Sorenson extension ??? */
|
| 2206 |
{ MKTAG('a','l','a','c'), mov_read_extradata }, /* alac specific atom */
|
| 2207 |
{ MKTAG('a','v','c','C'), mov_read_glbl },
|
| 2208 |
{ MKTAG('p','a','s','p'), mov_read_pasp },
|
| 2209 |
{ MKTAG('s','t','b','l'), mov_read_default },
|
| 2210 |
{ MKTAG('s','t','c','o'), mov_read_stco },
|
| 2211 |
{ MKTAG('s','t','p','s'), mov_read_stps },
|
| 2212 |
{ MKTAG('s','t','r','f'), mov_read_strf },
|
| 2213 |
{ MKTAG('s','t','s','c'), mov_read_stsc },
|
| 2214 |
{ MKTAG('s','t','s','d'), mov_read_stsd }, /* sample description */
|
| 2215 |
{ MKTAG('s','t','s','s'), mov_read_stss }, /* sync sample */
|
| 2216 |
{ MKTAG('s','t','s','z'), mov_read_stsz }, /* sample size */
|
| 2217 |
{ MKTAG('s','t','t','s'), mov_read_stts },
|
| 2218 |
{ MKTAG('s','t','z','2'), mov_read_stsz }, /* compact sample size */
|
| 2219 |
{ MKTAG('t','k','h','d'), mov_read_tkhd }, /* track header */
|
| 2220 |
{ MKTAG('t','f','h','d'), mov_read_tfhd }, /* track fragment header */
|
| 2221 |
{ MKTAG('t','r','a','k'), mov_read_trak },
|
| 2222 |
{ MKTAG('t','r','a','f'), mov_read_default },
|
| 2223 |
{ MKTAG('t','r','e','f'), mov_read_default },
|
| 2224 |
{ MKTAG('c','h','a','p'), mov_read_chap },
|
| 2225 |
{ MKTAG('t','r','e','x'), mov_read_trex },
|
| 2226 |
{ MKTAG('t','r','u','n'), mov_read_trun },
|
| 2227 |
{ MKTAG('u','d','t','a'), mov_read_default },
|
| 2228 |
{ MKTAG('w','a','v','e'), mov_read_wave },
|
| 2229 |
{ MKTAG('e','s','d','s'), mov_read_esds },
|
| 2230 |
{ MKTAG('d','a','c','3'), mov_read_dac3 }, /* AC-3 info */
|
| 2231 |
{ MKTAG('w','i','d','e'), mov_read_wide }, /* place holder */
|
| 2232 |
{ MKTAG('c','m','o','v'), mov_read_cmov },
|
| 2233 |
{ 0, NULL }
|
| 2234 |
}; |
| 2235 |
|
| 2236 |
static int mov_probe(AVProbeData *p) |
| 2237 |
{
|
| 2238 |
unsigned int offset; |
| 2239 |
uint32_t tag; |
| 2240 |
int score = 0; |
| 2241 |
|
| 2242 |
/* check file header */
|
| 2243 |
offset = 0;
|
| 2244 |
for(;;) {
|
| 2245 |
/* ignore invalid offset */
|
| 2246 |
if ((offset + 8) > (unsigned int)p->buf_size) |
| 2247 |
return score;
|
| 2248 |
tag = AV_RL32(p->buf + offset + 4);
|
| 2249 |
switch(tag) {
|
| 2250 |
/* check for obvious tags */
|
| 2251 |
case MKTAG('j','P',' ',' '): /* jpeg 2000 signature */ |
| 2252 |
case MKTAG('m','o','o','v'): |
| 2253 |
case MKTAG('m','d','a','t'): |
| 2254 |
case MKTAG('p','n','o','t'): /* detect movs with preview pics like ew.mov and april.mov */ |
| 2255 |
case MKTAG('u','d','t','a'): /* Packet Video PVAuthor adds this and a lot of more junk */ |
| 2256 |
case MKTAG('f','t','y','p'): |
| 2257 |
return AVPROBE_SCORE_MAX;
|
| 2258 |
/* those are more common words, so rate then a bit less */
|
| 2259 |
case MKTAG('e','d','i','w'): /* xdcam files have reverted first tags */ |
| 2260 |
case MKTAG('w','i','d','e'): |
| 2261 |
case MKTAG('f','r','e','e'): |
| 2262 |
case MKTAG('j','u','n','k'): |
| 2263 |
case MKTAG('p','i','c','t'): |
| 2264 |
return AVPROBE_SCORE_MAX - 5; |
| 2265 |
case MKTAG(0x82,0x82,0x7f,0x7d): |
| 2266 |
case MKTAG('s','k','i','p'): |
| 2267 |
case MKTAG('u','u','i','d'): |
| 2268 |
case MKTAG('p','r','f','l'): |
| 2269 |
offset = AV_RB32(p->buf+offset) + offset; |
| 2270 |
/* if we only find those cause probedata is too small at least rate them */
|
| 2271 |
score = AVPROBE_SCORE_MAX - 50;
|
| 2272 |
break;
|
| 2273 |
default:
|
| 2274 |
/* unrecognized tag */
|
| 2275 |
return score;
|
| 2276 |
} |
| 2277 |
} |
| 2278 |
return score;
|
| 2279 |
} |
| 2280 |
|
| 2281 |
// must be done after parsing all trak because there's no order requirement
|
| 2282 |
static void mov_read_chapters(AVFormatContext *s) |
| 2283 |
{
|
| 2284 |
MOVContext *mov = s->priv_data; |
| 2285 |
AVStream *st = NULL;
|
| 2286 |
MOVStreamContext *sc; |
| 2287 |
int64_t cur_pos; |
| 2288 |
int i;
|
| 2289 |
|
| 2290 |
for (i = 0; i < s->nb_streams; i++) |
| 2291 |
if (s->streams[i]->id == mov->chapter_track) {
|
| 2292 |
st = s->streams[i]; |
| 2293 |
break;
|
| 2294 |
} |
| 2295 |
if (!st) {
|
| 2296 |
av_log(s, AV_LOG_ERROR, "Referenced QT chapter track not found\n");
|
| 2297 |
return;
|
| 2298 |
} |
| 2299 |
|
| 2300 |
st->discard = AVDISCARD_ALL; |
| 2301 |
sc = st->priv_data; |
| 2302 |
cur_pos = url_ftell(sc->pb); |
| 2303 |
|
| 2304 |
for (i = 0; i < st->nb_index_entries; i++) { |
| 2305 |
AVIndexEntry *sample = &st->index_entries[i]; |
| 2306 |
int64_t end = i+1 < st->nb_index_entries ? st->index_entries[i+1].timestamp : st->duration; |
| 2307 |
uint8_t *title; |
| 2308 |
uint16_t ch; |
| 2309 |
int len, title_len;
|
| 2310 |
|
| 2311 |
if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
|
| 2312 |
av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
|
| 2313 |
goto finish;
|
| 2314 |
} |
| 2315 |
|
| 2316 |
// the first two bytes are the length of the title
|
| 2317 |
len = avio_rb16(sc->pb); |
| 2318 |
if (len > sample->size-2) |
| 2319 |
continue;
|
| 2320 |
title_len = 2*len + 1; |
| 2321 |
if (!(title = av_mallocz(title_len)))
|
| 2322 |
goto finish;
|
| 2323 |
|
| 2324 |
// The samples could theoretically be in any encoding if there's an encd
|
| 2325 |
// atom following, but in practice are only utf-8 or utf-16, distinguished
|
| 2326 |
// instead by the presence of a BOM
|
| 2327 |
ch = avio_rb16(sc->pb); |
| 2328 |
if (ch == 0xfeff) |
| 2329 |
avio_get_str16be(sc->pb, len, title, title_len); |
| 2330 |
else if (ch == 0xfffe) |
| 2331 |
avio_get_str16le(sc->pb, len, title, title_len); |
| 2332 |
else {
|
| 2333 |
AV_WB16(title, ch); |
| 2334 |
avio_get_str(sc->pb, len - 2, title + 2, title_len - 2); |
| 2335 |
} |
| 2336 |
|
| 2337 |
ff_new_chapter(s, i, st->time_base, sample->timestamp, end, title); |
| 2338 |
av_freep(&title); |
| 2339 |
} |
| 2340 |
finish:
|
| 2341 |
avio_seek(sc->pb, cur_pos, SEEK_SET); |
| 2342 |
} |
| 2343 |
|
| 2344 |
static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap) |
| 2345 |
{
|
| 2346 |
MOVContext *mov = s->priv_data; |
| 2347 |
AVIOContext *pb = s->pb; |
| 2348 |
int err;
|
| 2349 |
MOVAtom atom = { AV_RL32("root") };
|
| 2350 |
|
| 2351 |
mov->fc = s; |
| 2352 |
/* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
|
| 2353 |
if(!url_is_streamed(pb))
|
| 2354 |
atom.size = url_fsize(pb); |
| 2355 |
else
|
| 2356 |
atom.size = INT64_MAX; |
| 2357 |
|
| 2358 |
/* check MOV header */
|
| 2359 |
if ((err = mov_read_default(mov, pb, atom)) < 0) { |
| 2360 |
av_log(s, AV_LOG_ERROR, "error reading header: %d\n", err);
|
| 2361 |
return err;
|
| 2362 |
} |
| 2363 |
if (!mov->found_moov) {
|
| 2364 |
av_log(s, AV_LOG_ERROR, "moov atom not found\n");
|
| 2365 |
return -1; |
| 2366 |
} |
| 2367 |
av_dlog(mov->fc, "on_parse_exit_offset=%lld\n", url_ftell(pb));
|
| 2368 |
|
| 2369 |
if (!url_is_streamed(pb) && mov->chapter_track > 0) |
| 2370 |
mov_read_chapters(s); |
| 2371 |
|
| 2372 |
return 0; |
| 2373 |
} |
| 2374 |
|
| 2375 |
static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
|
| 2376 |
{
|
| 2377 |
AVIndexEntry *sample = NULL;
|
| 2378 |
int64_t best_dts = INT64_MAX; |
| 2379 |
int i;
|
| 2380 |
for (i = 0; i < s->nb_streams; i++) { |
| 2381 |
AVStream *avst = s->streams[i]; |
| 2382 |
MOVStreamContext *msc = avst->priv_data; |
| 2383 |
if (msc->pb && msc->current_sample < avst->nb_index_entries) {
|
| 2384 |
AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample]; |
| 2385 |
int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale); |
| 2386 |
av_dlog(s, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts); |
| 2387 |
if (!sample || (url_is_streamed(s->pb) && current_sample->pos < sample->pos) ||
|
| 2388 |
(!url_is_streamed(s->pb) && |
| 2389 |
((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb && |
| 2390 |
((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) || |
| 2391 |
(FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
|
| 2392 |
sample = current_sample; |
| 2393 |
best_dts = dts; |
| 2394 |
*st = avst; |
| 2395 |
} |
| 2396 |
} |
| 2397 |
} |
| 2398 |
return sample;
|
| 2399 |
} |
| 2400 |
|
| 2401 |
static int mov_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 2402 |
{
|
| 2403 |
MOVContext *mov = s->priv_data; |
| 2404 |
MOVStreamContext *sc; |
| 2405 |
AVIndexEntry *sample; |
| 2406 |
AVStream *st = NULL;
|
| 2407 |
int ret;
|
| 2408 |
retry:
|
| 2409 |
sample = mov_find_next_sample(s, &st); |
| 2410 |
if (!sample) {
|
| 2411 |
mov->found_mdat = 0;
|
| 2412 |
if (!url_is_streamed(s->pb) ||
|
| 2413 |
mov_read_default(mov, s->pb, (MOVAtom){ AV_RL32("root"), INT64_MAX }) < 0 ||
|
| 2414 |
url_feof(s->pb)) |
| 2415 |
return AVERROR_EOF;
|
| 2416 |
av_dlog(s, "read fragments, offset 0x%llx\n", url_ftell(s->pb));
|
| 2417 |
goto retry;
|
| 2418 |
} |
| 2419 |
sc = st->priv_data; |
| 2420 |
/* must be done just before reading, to avoid infinite loop on sample */
|
| 2421 |
sc->current_sample++; |
| 2422 |
|
| 2423 |
if (st->discard != AVDISCARD_ALL) {
|
| 2424 |
if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
|
| 2425 |
av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n", |
| 2426 |
sc->ffindex, sample->pos); |
| 2427 |
return -1; |
| 2428 |
} |
| 2429 |
ret = av_get_packet(sc->pb, pkt, sample->size); |
| 2430 |
if (ret < 0) |
| 2431 |
return ret;
|
| 2432 |
#if CONFIG_DV_DEMUXER
|
| 2433 |
if (mov->dv_demux && sc->dv_audio_container) {
|
| 2434 |
dv_produce_packet(mov->dv_demux, pkt, pkt->data, pkt->size); |
| 2435 |
av_free(pkt->data); |
| 2436 |
pkt->size = 0;
|
| 2437 |
ret = dv_get_packet(mov->dv_demux, pkt); |
| 2438 |
if (ret < 0) |
| 2439 |
return ret;
|
| 2440 |
} |
| 2441 |
#endif
|
| 2442 |
} |
| 2443 |
|
| 2444 |
pkt->stream_index = sc->ffindex; |
| 2445 |
pkt->dts = sample->timestamp; |
| 2446 |
if (sc->ctts_data) {
|
| 2447 |
pkt->pts = pkt->dts + sc->dts_shift + sc->ctts_data[sc->ctts_index].duration; |
| 2448 |
/* update ctts context */
|
| 2449 |
sc->ctts_sample++; |
| 2450 |
if (sc->ctts_index < sc->ctts_count &&
|
| 2451 |
sc->ctts_data[sc->ctts_index].count == sc->ctts_sample) {
|
| 2452 |
sc->ctts_index++; |
| 2453 |
sc->ctts_sample = 0;
|
| 2454 |
} |
| 2455 |
if (sc->wrong_dts)
|
| 2456 |
pkt->dts = AV_NOPTS_VALUE; |
| 2457 |
} else {
|
| 2458 |
int64_t next_dts = (sc->current_sample < st->nb_index_entries) ? |
| 2459 |
st->index_entries[sc->current_sample].timestamp : st->duration; |
| 2460 |
pkt->duration = next_dts - pkt->dts; |
| 2461 |
pkt->pts = pkt->dts; |
| 2462 |
} |
| 2463 |
if (st->discard == AVDISCARD_ALL)
|
| 2464 |
goto retry;
|
| 2465 |
pkt->flags |= sample->flags & AVINDEX_KEYFRAME ? AV_PKT_FLAG_KEY : 0;
|
| 2466 |
pkt->pos = sample->pos; |
| 2467 |
av_dlog(s, "stream %d, pts %"PRId64", dts %"PRId64", pos 0x%"PRIx64", duration %d\n", |
| 2468 |
pkt->stream_index, pkt->pts, pkt->dts, pkt->pos, pkt->duration); |
| 2469 |
return 0; |
| 2470 |
} |
| 2471 |
|
| 2472 |
static int mov_seek_stream(AVFormatContext *s, AVStream *st, int64_t timestamp, int flags) |
| 2473 |
{
|
| 2474 |
MOVStreamContext *sc = st->priv_data; |
| 2475 |
int sample, time_sample;
|
| 2476 |
int i;
|
| 2477 |
|
| 2478 |
sample = av_index_search_timestamp(st, timestamp, flags); |
| 2479 |
av_dlog(s, "stream %d, timestamp %"PRId64", sample %d\n", st->index, timestamp, sample); |
| 2480 |
if (sample < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp) |
| 2481 |
sample = 0;
|
| 2482 |
if (sample < 0) /* not sure what to do */ |
| 2483 |
return -1; |
| 2484 |
sc->current_sample = sample; |
| 2485 |
av_dlog(s, "stream %d, found sample %d\n", st->index, sc->current_sample);
|
| 2486 |
/* adjust ctts index */
|
| 2487 |
if (sc->ctts_data) {
|
| 2488 |
time_sample = 0;
|
| 2489 |
for (i = 0; i < sc->ctts_count; i++) { |
| 2490 |
int next = time_sample + sc->ctts_data[i].count;
|
| 2491 |
if (next > sc->current_sample) {
|
| 2492 |
sc->ctts_index = i; |
| 2493 |
sc->ctts_sample = sc->current_sample - time_sample; |
| 2494 |
break;
|
| 2495 |
} |
| 2496 |
time_sample = next; |
| 2497 |
} |
| 2498 |
} |
| 2499 |
return sample;
|
| 2500 |
} |
| 2501 |
|
| 2502 |
static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) |
| 2503 |
{
|
| 2504 |
AVStream *st; |
| 2505 |
int64_t seek_timestamp, timestamp; |
| 2506 |
int sample;
|
| 2507 |
int i;
|
| 2508 |
|
| 2509 |
if (stream_index >= s->nb_streams)
|
| 2510 |
return -1; |
| 2511 |
if (sample_time < 0) |
| 2512 |
sample_time = 0;
|
| 2513 |
|
| 2514 |
st = s->streams[stream_index]; |
| 2515 |
sample = mov_seek_stream(s, st, sample_time, flags); |
| 2516 |
if (sample < 0) |
| 2517 |
return -1; |
| 2518 |
|
| 2519 |
/* adjust seek timestamp to found sample timestamp */
|
| 2520 |
seek_timestamp = st->index_entries[sample].timestamp; |
| 2521 |
|
| 2522 |
for (i = 0; i < s->nb_streams; i++) { |
| 2523 |
st = s->streams[i]; |
| 2524 |
if (stream_index == i)
|
| 2525 |
continue;
|
| 2526 |
|
| 2527 |
timestamp = av_rescale_q(seek_timestamp, s->streams[stream_index]->time_base, st->time_base); |
| 2528 |
mov_seek_stream(s, st, timestamp, flags); |
| 2529 |
} |
| 2530 |
return 0; |
| 2531 |
} |
| 2532 |
|
| 2533 |
static int mov_read_close(AVFormatContext *s) |
| 2534 |
{
|
| 2535 |
MOVContext *mov = s->priv_data; |
| 2536 |
int i, j;
|
| 2537 |
|
| 2538 |
for (i = 0; i < s->nb_streams; i++) { |
| 2539 |
AVStream *st = s->streams[i]; |
| 2540 |
MOVStreamContext *sc = st->priv_data; |
| 2541 |
|
| 2542 |
av_freep(&sc->ctts_data); |
| 2543 |
for (j = 0; j < sc->drefs_count; j++) { |
| 2544 |
av_freep(&sc->drefs[j].path); |
| 2545 |
av_freep(&sc->drefs[j].dir); |
| 2546 |
} |
| 2547 |
av_freep(&sc->drefs); |
| 2548 |
if (sc->pb && sc->pb != s->pb)
|
| 2549 |
avio_close(sc->pb); |
| 2550 |
|
| 2551 |
av_freep(&st->codec->palctrl); |
| 2552 |
} |
| 2553 |
|
| 2554 |
if (mov->dv_demux) {
|
| 2555 |
for(i = 0; i < mov->dv_fctx->nb_streams; i++) { |
| 2556 |
av_freep(&mov->dv_fctx->streams[i]->codec); |
| 2557 |
av_freep(&mov->dv_fctx->streams[i]); |
| 2558 |
} |
| 2559 |
av_freep(&mov->dv_fctx); |
| 2560 |
av_freep(&mov->dv_demux); |
| 2561 |
} |
| 2562 |
|
| 2563 |
av_freep(&mov->trex_data); |
| 2564 |
|
| 2565 |
return 0; |
| 2566 |
} |
| 2567 |
|
| 2568 |
AVInputFormat ff_mov_demuxer = {
|
| 2569 |
"mov,mp4,m4a,3gp,3g2,mj2",
|
| 2570 |
NULL_IF_CONFIG_SMALL("QuickTime/MPEG-4/Motion JPEG 2000 format"),
|
| 2571 |
sizeof(MOVContext),
|
| 2572 |
mov_probe, |
| 2573 |
mov_read_header, |
| 2574 |
mov_read_packet, |
| 2575 |
mov_read_close, |
| 2576 |
mov_read_seek, |
| 2577 |
}; |