ffmpeg / libavformat / wtvdec.c @ 8acab7ae
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/*
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* Windows Television (WTV) demuxer
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* Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
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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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/**
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* @file
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* Windows Television (WTV) demuxer
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* @author Peter Ross <pross@xvid.org>
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*/
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/intfloat_readwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "wtv.h" |
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#include "mpegts.h" |
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#include <strings.h> |
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/* Macros for formating GUIDs */
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#define PRI_PRETTY_GUID \
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"%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
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#define ARG_PRETTY_GUID(g) \
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AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] |
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#define LEN_PRETTY_GUID 34 |
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/*
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*
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* File system routines
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*
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*/
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typedef struct { |
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AVIOContext *pb_filesystem; /** file system (AVFormatContext->pb) */
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int sector_bits; /** sector shift bits; used to convert sector number into pb_filesystem offset */ |
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uint32_t *sectors; /** file allocation table */
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int nb_sectors; /** number of sectors */ |
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int error;
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int64_t position; |
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int64_t length; |
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} WtvFile; |
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/**
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* @return bytes read, 0 on end of file, or <0 on error
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*/
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static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size) |
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{ |
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WtvFile *wf = opaque; |
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AVIOContext *pb = wf->pb_filesystem; |
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int nread = 0; |
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if (wf->error || pb->error)
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return -1; |
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if (wf->position >= wf->length || url_feof(pb))
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return 0; |
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buf_size = FFMIN(buf_size, wf->length - wf->position); |
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while(nread < buf_size) {
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int n;
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int remaining_in_sector = (1 << wf->sector_bits) - (wf->position & ((1 << wf->sector_bits) - 1)); |
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int read_request = FFMIN(buf_size - nread, remaining_in_sector);
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n = avio_read(pb, buf, read_request); |
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if (n <= 0) |
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break;
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nread += n; |
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buf += n; |
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wf->position += n; |
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if (n == remaining_in_sector) {
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int i = wf->position >> wf->sector_bits;
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if (i >= wf->nb_sectors ||
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(wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) && |
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avio_seek(pb, (int64_t)wf->sectors[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)) {
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wf->error = 1;
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break;
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} |
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} |
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} |
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return nread;
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} |
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/**
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* @return position (or file length)
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*/
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static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence) |
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{ |
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WtvFile *wf = opaque; |
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AVIOContext *pb = wf->pb_filesystem; |
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if (whence == AVSEEK_SIZE)
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return wf->length;
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else if (whence == SEEK_CUR) |
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offset = wf->position + offset; |
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else if (whence == SEEK_END) |
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offset = wf->length; |
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wf->error = offset < 0 || offset >= wf->length ||
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avio_seek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS) |
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+ (offset & ((1 << wf->sector_bits) - 1)), SEEK_SET) < 0; |
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wf->position = offset; |
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return offset;
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} |
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/**
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* read non-zero integers (le32) from input stream
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* @param pb
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* @param[out] data destination
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* @param count maximum number of integers to read
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* @return total number of integers read
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*/
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static int read_ints(AVIOContext *pb, uint32_t *data, int count) |
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{ |
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int i, total = 0; |
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for (i = 0; i < count; i++) { |
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if ((data[total] = avio_rl32(pb)))
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total++; |
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} |
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return total;
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} |
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/**
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* Open file
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* @param first_sector First sector
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* @param length Length of file (bytes)
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* @param depth File allocation table depth
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* @return NULL on error
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*/
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static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s) |
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{ |
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AVIOContext *pb; |
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WtvFile *wf; |
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uint8_t *buffer; |
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if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0) |
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return NULL; |
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wf = av_mallocz(sizeof(WtvFile));
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if (!wf)
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return NULL; |
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if (depth == 0) { |
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wf->sectors = av_malloc(sizeof(uint32_t));
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if (!wf->sectors) {
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av_free(wf); |
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return NULL; |
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} |
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wf->sectors[0] = first_sector;
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wf->nb_sectors = 1;
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wf->sector_bits = WTV_SECTOR_BITS; |
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} else if (depth == 1) { |
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wf->sectors = av_malloc(WTV_SECTOR_SIZE); |
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if (!wf->sectors) {
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av_free(wf); |
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return NULL; |
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} |
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wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
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wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; |
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} else if (depth == 2) { |
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uint32_t sectors1[WTV_SECTOR_SIZE / 4];
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int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4); |
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int i;
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wf->sectors = av_malloc(nb_sectors1 << WTV_SECTOR_BITS); |
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if (!wf->sectors) {
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av_free(wf); |
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return NULL; |
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} |
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wf->nb_sectors = 0;
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for (i = 0; i < nb_sectors1; i++) { |
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if (avio_seek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0) |
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break;
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wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4); |
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} |
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wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; |
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} else {
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av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
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av_free(wf); |
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return NULL; |
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} |
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if (!wf->nb_sectors) {
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av_free(wf->sectors); |
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av_free(wf); |
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return NULL; |
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} |
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/* check length */
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length &= 0xFFFFFFFFFFFF;
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if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
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av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits); |
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length = (int64_t)wf->nb_sectors << wf->sector_bits; |
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} |
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wf->length = length; |
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/* seek to intial sector */
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wf->position = 0;
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if (avio_seek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 0) { |
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av_free(wf->sectors); |
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av_free(wf); |
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return NULL; |
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} |
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wf->pb_filesystem = s->pb; |
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buffer = av_malloc(1 << wf->sector_bits);
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if (!buffer) {
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av_free(wf->sectors); |
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av_free(wf); |
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return NULL; |
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} |
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pb = avio_alloc_context(buffer, 1 << wf->sector_bits, 0, wf, |
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wtvfile_read_packet, NULL, wtvfile_seek);
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if (!pb) {
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av_free(buffer); |
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av_free(wf->sectors); |
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av_free(wf); |
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} |
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return pb;
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} |
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/**
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* Open file using filename
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* @param[in] buf directory buffer
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* @param buf_size directory buffer size
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* @param[in] filename
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* @param filename_size size of filename
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* @return NULL on error
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*/
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static AVIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size) |
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{ |
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const uint8_t *buf_end = buf + buf_size;
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while(buf + 48 <= buf_end) { |
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int dir_length, name_size, first_sector, depth;
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uint64_t file_length; |
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const uint8_t *name;
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if (ff_guidcmp(buf, ff_dir_entry_guid)) {
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av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; " |
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"remaining directory entries ignored\n", FF_ARG_GUID(buf));
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break;
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} |
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dir_length = AV_RL16(buf + 16);
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file_length = AV_RL64(buf + 24);
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name_size = 2 * AV_RL32(buf + 32); |
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if (buf + 48 + name_size > buf_end) { |
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av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
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break;
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} |
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first_sector = AV_RL32(buf + 40 + name_size);
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depth = AV_RL32(buf + 44 + name_size);
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/* compare file name; test optional null terminator */
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name = buf + 40;
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if (name_size >= filename_size &&
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!memcmp(name, filename, filename_size) && |
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(name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
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return wtvfile_open_sector(first_sector, file_length, depth, s);
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buf += dir_length; |
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} |
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return 0; |
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} |
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#define wtvfile_open(s, buf, buf_size, filename) \
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wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
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/**
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* Close file opened with wtvfile_open_sector(), or wtv_open()
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*/
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static void wtvfile_close(AVIOContext *pb) |
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{ |
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WtvFile *wf = pb->opaque; |
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av_free(wf->sectors); |
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av_free(pb); |
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} |
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/*
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*
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* Main demuxer
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*
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*/
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typedef struct { |
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int seen_data;
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} WtvStream; |
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typedef struct { |
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AVIOContext *pb; /** timeline file */
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int64_t epoch; |
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int64_t pts; /** pts for next data chunk */
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int64_t last_valid_pts; /** latest valid pts, used for interative seeking */
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/* maintain private seek index, as the AVIndexEntry->pos is relative to the
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start of the 'timeline' file, not the file system (AVFormatContext->pb) */
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AVIndexEntry *index_entries; |
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int nb_index_entries;
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unsigned int index_entries_allocated_size; |
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} WtvContext; |
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/* WTV GUIDs */
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static const ff_asf_guid metadata_guid = |
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{0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53}; |
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static const ff_asf_guid stream2_guid = |
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{0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; |
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static const ff_asf_guid EVENTID_SubtitleSpanningEvent = |
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{0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}; |
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static const ff_asf_guid EVENTID_LanguageSpanningEvent = |
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{0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; |
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static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent = |
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{0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}; |
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static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = |
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{0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; |
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static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = |
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{0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; |
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static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = |
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{0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; |
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static const ff_asf_guid EVENTID_StreamIDSpanningEvent = |
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{0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}; |
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static const ff_asf_guid EVENTID_TeletextSpanningEvent = |
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{0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; |
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static const ff_asf_guid EVENTID_AudioTypeSpanningEvent = |
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{0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}; |
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/* Windows media GUIDs */
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/* Media types */
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static const ff_asf_guid mediasubtype_mpeg1payload = |
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{0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}; |
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static const ff_asf_guid mediatype_mpeg2_sections = |
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{0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}; |
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static const ff_asf_guid mediatype_mpeg2_pes = |
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{0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
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static const ff_asf_guid mediatype_mstvcaption = |
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{0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}; |
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|
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/* Media subtypes */
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static const ff_asf_guid mediasubtype_cpfilters_processed = |
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{0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D}; |
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static const ff_asf_guid mediasubtype_dvb_subtitle = |
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{0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}; |
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static const ff_asf_guid mediasubtype_teletext = |
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{0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
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static const ff_asf_guid mediasubtype_dtvccdata = |
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{0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}; |
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static const ff_asf_guid mediasubtype_mpeg2_sections = |
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{0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}; |
365 |
|
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/* Formats */
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static const ff_asf_guid format_cpfilters_processed = |
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{0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A}; |
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static const ff_asf_guid format_waveformatex = |
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{0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A}; |
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static const ff_asf_guid format_videoinfo2 = |
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{0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
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static const ff_asf_guid format_mpeg2_video = |
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{0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
375 |
|
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static int read_probe(AVProbeData *p) |
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{ |
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return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX; |
379 |
} |
380 |
|
381 |
/**
|
382 |
* Convert win32 FILETIME to ISO-8601 string
|
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*/
|
384 |
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value) |
385 |
{ |
386 |
time_t t = (value / 10000000LL) - 11644473600LL; |
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strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
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} |
389 |
|
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/**
|
391 |
* Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
|
392 |
*/
|
393 |
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value) |
394 |
{ |
395 |
time_t t = (value / 10000000LL) - 719162LL*86400LL; |
396 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
397 |
} |
398 |
|
399 |
/**
|
400 |
* Convert OLE DATE to ISO-8601 string
|
401 |
* @return <0 on error
|
402 |
*/
|
403 |
static int oledate_to_iso8601(char *buf, int buf_size, int64_t value) |
404 |
{ |
405 |
time_t t = 631112400LL + 86400*av_int2dbl(value); |
406 |
struct tm result;
|
407 |
if (!gmtime_r(&t, &result))
|
408 |
return -1; |
409 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", &result);
|
410 |
return 0; |
411 |
} |
412 |
|
413 |
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) |
414 |
{ |
415 |
char mime[1024]; |
416 |
char description[1024]; |
417 |
unsigned int filesize; |
418 |
AVStream *st; |
419 |
int64_t pos = avio_tell(pb); |
420 |
|
421 |
avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
|
422 |
if (strcmp(mime, "image/jpeg")) |
423 |
goto done;
|
424 |
|
425 |
avio_r8(pb); |
426 |
avio_get_str16le(pb, INT_MAX, description, sizeof(description));
|
427 |
filesize = avio_rl32(pb); |
428 |
if (!filesize)
|
429 |
goto done;
|
430 |
|
431 |
st = av_new_stream(s, 0);
|
432 |
if (!st)
|
433 |
goto done;
|
434 |
av_metadata_set2(&st->metadata, "title", description, 0); |
435 |
st->codec->codec_id = CODEC_ID_MJPEG; |
436 |
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; |
437 |
st->codec->extradata = av_mallocz(filesize); |
438 |
if (!st->codec->extradata)
|
439 |
goto done;
|
440 |
st->codec->extradata_size = filesize; |
441 |
avio_read(pb, st->codec->extradata, filesize); |
442 |
done:
|
443 |
avio_seek(pb, pos + length, SEEK_SET); |
444 |
} |
445 |
|
446 |
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length) |
447 |
{ |
448 |
int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1; |
449 |
char *buf = av_malloc(buf_size);
|
450 |
if (!buf)
|
451 |
return;
|
452 |
|
453 |
if (type == 0 && length == 4) { |
454 |
snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
|
455 |
} else if (type == 1) { |
456 |
avio_get_str16le(pb, length, buf, buf_size); |
457 |
if (!strlen(buf)) {
|
458 |
av_free(buf); |
459 |
return;
|
460 |
} |
461 |
} else if (type == 3 && length == 4) { |
462 |
strcpy(buf, avio_rl32(pb) ? "true" : "false"); |
463 |
} else if (type == 4 && length == 8) { |
464 |
int64_t num = avio_rl64(pb); |
465 |
if (!strcmp(key, "WM/EncodingTime") || |
466 |
!strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
|
467 |
filetime_to_iso8601(buf, buf_size, num); |
468 |
else if (!strcmp(key, "WM/WMRVEncodeTime") || |
469 |
!strcmp(key, "WM/WMRVEndTime"))
|
470 |
crazytime_to_iso8601(buf, buf_size, num); |
471 |
else if (!strcmp(key, "WM/WMRVExpirationDate")) { |
472 |
if (oledate_to_iso8601(buf, buf_size, num) < 0 ) { |
473 |
av_free(buf); |
474 |
return;
|
475 |
} |
476 |
} else if (!strcmp(key, "WM/WMRVBitrate")) |
477 |
snprintf(buf, buf_size, "%f", av_int2dbl(num));
|
478 |
else
|
479 |
snprintf(buf, buf_size, "%"PRIi64, num);
|
480 |
} else if (type == 5 && length == 2) { |
481 |
snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
|
482 |
} else if (type == 6 && length == 16) { |
483 |
ff_asf_guid guid; |
484 |
avio_read(pb, guid, 16);
|
485 |
snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid)); |
486 |
} else if (type == 2 && !strcmp(key, "WM/Picture")) { |
487 |
get_attachment(s, pb, length); |
488 |
av_freep(&buf); |
489 |
return;
|
490 |
} else {
|
491 |
av_freep(&buf); |
492 |
av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
|
493 |
avio_skip(pb, length); |
494 |
return;
|
495 |
} |
496 |
|
497 |
av_metadata_set2(&s->metadata, key, buf, 0);
|
498 |
av_freep(&buf); |
499 |
} |
500 |
|
501 |
/**
|
502 |
* Parse metadata entries
|
503 |
*/
|
504 |
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb) |
505 |
{ |
506 |
ff_asf_guid guid; |
507 |
int length, type;
|
508 |
while(!url_feof(pb)) {
|
509 |
char key[1024]; |
510 |
ff_get_guid(pb, &guid); |
511 |
type = avio_rl32(pb); |
512 |
length = avio_rl32(pb); |
513 |
if (!length)
|
514 |
break;
|
515 |
if (ff_guidcmp(&guid, metadata_guid)) {
|
516 |
av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; " |
517 |
"remaining metadata entries ignored\n", FF_ARG_GUID(guid));
|
518 |
break;
|
519 |
} |
520 |
avio_get_str16le(pb, INT_MAX, key, sizeof(key));
|
521 |
get_tag(s, pb, key, type, length); |
522 |
} |
523 |
|
524 |
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
|
525 |
} |
526 |
|
527 |
/**
|
528 |
* parse VIDEOINFOHEADER2 structure
|
529 |
* @return bytes consumed
|
530 |
*/
|
531 |
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) |
532 |
{ |
533 |
WtvContext *wtv = s->priv_data; |
534 |
AVIOContext *pb = wtv->pb; |
535 |
|
536 |
avio_skip(pb, 72); // picture aspect ratio is unreliable |
537 |
ff_get_bmp_header(pb, st); |
538 |
|
539 |
return 72 + 40; |
540 |
} |
541 |
|
542 |
/**
|
543 |
* Parse MPEG1WAVEFORMATEX extradata structure
|
544 |
*/
|
545 |
static void parse_mpeg1waveformatex(AVStream *st) |
546 |
{ |
547 |
/* fwHeadLayer */
|
548 |
switch (AV_RL16(st->codec->extradata)) {
|
549 |
case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break; |
550 |
case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break; |
551 |
case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break; |
552 |
} |
553 |
|
554 |
st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ |
555 |
|
556 |
/* dwHeadMode */
|
557 |
switch (AV_RL16(st->codec->extradata + 6)) { |
558 |
case 1 : case 2 : case 4 : st->codec->channels = 2; break; |
559 |
case 8 : st->codec->channels = 1; break; |
560 |
} |
561 |
} |
562 |
|
563 |
/**
|
564 |
* Initialise stream
|
565 |
* @param st Stream to initialise, or NULL to create and initialise new stream
|
566 |
* @return NULL on error
|
567 |
*/
|
568 |
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) |
569 |
{ |
570 |
if (st) {
|
571 |
if (st->codec->extradata) {
|
572 |
av_freep(&st->codec->extradata); |
573 |
st->codec->extradata_size = 0;
|
574 |
} |
575 |
} else {
|
576 |
WtvStream *wst = av_mallocz(sizeof(WtvStream));
|
577 |
if (!wst)
|
578 |
return NULL; |
579 |
st = av_new_stream(s, sid); |
580 |
if (!st)
|
581 |
return NULL; |
582 |
st->priv_data = wst; |
583 |
} |
584 |
st->codec->codec_type = codec_type; |
585 |
st->need_parsing = AVSTREAM_PARSE_FULL; |
586 |
av_set_pts_info(st, 64, 1, 10000000); |
587 |
return st;
|
588 |
} |
589 |
|
590 |
/**
|
591 |
* parse Media Type structure and populate stream
|
592 |
* @param st Stream, or NULL to create new stream
|
593 |
* @param mediatype Mediatype GUID
|
594 |
* @param subtype Subtype GUID
|
595 |
* @param formattype Format GUID
|
596 |
* @param size Size of format buffer
|
597 |
* @return NULL on error
|
598 |
*/
|
599 |
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, |
600 |
ff_asf_guid mediatype, ff_asf_guid subtype, |
601 |
ff_asf_guid formattype, int size)
|
602 |
{ |
603 |
WtvContext *wtv = s->priv_data; |
604 |
AVIOContext *pb = wtv->pb; |
605 |
if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
|
606 |
!ff_guidcmp(formattype, format_cpfilters_processed)) { |
607 |
ff_asf_guid actual_subtype; |
608 |
ff_asf_guid actual_formattype; |
609 |
|
610 |
if (size < 32) { |
611 |
av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
|
612 |
avio_skip(pb, size); |
613 |
return NULL; |
614 |
} |
615 |
|
616 |
avio_skip(pb, size - 32);
|
617 |
ff_get_guid(pb, &actual_subtype); |
618 |
ff_get_guid(pb, &actual_formattype); |
619 |
avio_seek(pb, -size, SEEK_CUR); |
620 |
|
621 |
st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
|
622 |
avio_skip(pb, 32);
|
623 |
return st;
|
624 |
} else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) { |
625 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); |
626 |
if (!st)
|
627 |
return NULL; |
628 |
if (!ff_guidcmp(formattype, format_waveformatex)) {
|
629 |
int ret = ff_get_wav_header(pb, st->codec, size);
|
630 |
if (ret < 0) |
631 |
return NULL; |
632 |
} else {
|
633 |
if (ff_guidcmp(formattype, ff_format_none))
|
634 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
635 |
avio_skip(pb, size); |
636 |
} |
637 |
|
638 |
if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { |
639 |
st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); |
640 |
} else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { |
641 |
if (st->codec->extradata && st->codec->extradata_size >= 22) |
642 |
parse_mpeg1waveformatex(st); |
643 |
else
|
644 |
av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
|
645 |
} else {
|
646 |
st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype); |
647 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
648 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); |
649 |
} |
650 |
return st;
|
651 |
} else if (!ff_guidcmp(mediatype, ff_mediatype_video)) { |
652 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); |
653 |
if (!st)
|
654 |
return NULL; |
655 |
if (!ff_guidcmp(formattype, format_videoinfo2)) {
|
656 |
int consumed = parse_videoinfoheader2(s, st);
|
657 |
avio_skip(pb, FFMAX(size - consumed, 0));
|
658 |
} else if (!ff_guidcmp(formattype, format_mpeg2_video)) { |
659 |
int consumed = parse_videoinfoheader2(s, st);
|
660 |
avio_skip(pb, FFMAX(size - consumed, 0));
|
661 |
} else {
|
662 |
if (ff_guidcmp(formattype, ff_format_none))
|
663 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
664 |
avio_skip(pb, size); |
665 |
} |
666 |
|
667 |
if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) { |
668 |
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); |
669 |
} else {
|
670 |
st->codec->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype); |
671 |
} |
672 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
673 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype)); |
674 |
return st;
|
675 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && |
676 |
!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) { |
677 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
678 |
if (!st)
|
679 |
return NULL; |
680 |
if (ff_guidcmp(formattype, ff_format_none))
|
681 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
682 |
avio_skip(pb, size); |
683 |
st->codec->codec_id = CODEC_ID_DVB_SUBTITLE; |
684 |
return st;
|
685 |
} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && |
686 |
(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) { |
687 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
688 |
if (!st)
|
689 |
return NULL; |
690 |
if (ff_guidcmp(formattype, ff_format_none))
|
691 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
692 |
avio_skip(pb, size); |
693 |
st->codec->codec_id = CODEC_ID_DVB_TELETEXT; |
694 |
return st;
|
695 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && |
696 |
!ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { |
697 |
if (ff_guidcmp(formattype, ff_format_none))
|
698 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype)); |
699 |
avio_skip(pb, size); |
700 |
return NULL; |
701 |
} |
702 |
|
703 |
av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
|
704 |
", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n", |
705 |
FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype)); |
706 |
avio_skip(pb, size); |
707 |
return NULL; |
708 |
} |
709 |
|
710 |
enum {
|
711 |
SEEK_TO_DATA = 0,
|
712 |
SEEK_TO_PTS, |
713 |
}; |
714 |
|
715 |
/**
|
716 |
* Parse WTV chunks
|
717 |
* @param mode SEEK_TO_DATA or SEEK_TO_PTS
|
718 |
* @param seekts timestamp
|
719 |
* @param[out] len Length of data chunk
|
720 |
* @return stream index of data chunk, or <0 on error
|
721 |
*/
|
722 |
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) |
723 |
{ |
724 |
WtvContext *wtv = s->priv_data; |
725 |
AVIOContext *pb = wtv->pb; |
726 |
while (!url_feof(pb)) {
|
727 |
ff_asf_guid g; |
728 |
int len, sid, consumed;
|
729 |
|
730 |
ff_get_guid(pb, &g); |
731 |
len = avio_rl32(pb); |
732 |
if (len < 32) |
733 |
break;
|
734 |
sid = avio_rl32(pb) & 0x7FFF;
|
735 |
avio_skip(pb, 8);
|
736 |
consumed = 32;
|
737 |
|
738 |
if (!ff_guidcmp(g, ff_stream_guid)) {
|
739 |
if (ff_find_stream_index(s, sid) < 0) { |
740 |
ff_asf_guid mediatype, subtype, formattype; |
741 |
int size;
|
742 |
avio_skip(pb, 28);
|
743 |
ff_get_guid(pb, &mediatype); |
744 |
ff_get_guid(pb, &subtype); |
745 |
avio_skip(pb, 12);
|
746 |
ff_get_guid(pb, &formattype); |
747 |
size = avio_rl32(pb); |
748 |
parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
|
749 |
consumed += 92 + size;
|
750 |
} |
751 |
} else if (!ff_guidcmp(g, stream2_guid)) { |
752 |
int stream_index = ff_find_stream_index(s, sid);
|
753 |
if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { |
754 |
ff_asf_guid mediatype, subtype, formattype; |
755 |
int size;
|
756 |
avio_skip(pb, 12);
|
757 |
ff_get_guid(pb, &mediatype); |
758 |
ff_get_guid(pb, &subtype); |
759 |
avio_skip(pb, 12);
|
760 |
ff_get_guid(pb, &formattype); |
761 |
size = avio_rl32(pb); |
762 |
parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); |
763 |
consumed += 76 + size;
|
764 |
} |
765 |
} else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || |
766 |
!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
767 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || |
768 |
!ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || |
769 |
!ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || |
770 |
!ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) { |
771 |
int stream_index = ff_find_stream_index(s, sid);
|
772 |
if (stream_index >= 0) { |
773 |
AVStream *st = s->streams[stream_index]; |
774 |
uint8_t buf[258];
|
775 |
const uint8_t *pbuf = buf;
|
776 |
int buf_size;
|
777 |
|
778 |
avio_skip(pb, 8);
|
779 |
consumed += 8;
|
780 |
if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
|
781 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { |
782 |
avio_skip(pb, 6);
|
783 |
consumed += 6;
|
784 |
} |
785 |
|
786 |
buf_size = FFMIN(len - consumed, sizeof(buf));
|
787 |
avio_read(pb, buf, buf_size); |
788 |
consumed += buf_size; |
789 |
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0); |
790 |
} |
791 |
} else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) { |
792 |
int stream_index = ff_find_stream_index(s, sid);
|
793 |
if (stream_index >= 0) { |
794 |
AVStream *st = s->streams[stream_index]; |
795 |
int audio_type;
|
796 |
avio_skip(pb, 8);
|
797 |
audio_type = avio_r8(pb); |
798 |
if (audio_type == 2) |
799 |
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; |
800 |
else if (audio_type == 3) |
801 |
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
802 |
consumed += 9;
|
803 |
} |
804 |
} else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { |
805 |
int stream_index = ff_find_stream_index(s, sid);
|
806 |
if (stream_index >= 0) { |
807 |
avio_skip(pb, 12);
|
808 |
if (avio_rl32(pb))
|
809 |
av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
|
810 |
consumed += 16;
|
811 |
} |
812 |
} else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { |
813 |
int stream_index = ff_find_stream_index(s, sid);
|
814 |
if (stream_index >= 0) { |
815 |
AVStream *st = s->streams[stream_index]; |
816 |
uint8_t language[4];
|
817 |
avio_skip(pb, 12);
|
818 |
avio_read(pb, language, 3);
|
819 |
if (language[0]) { |
820 |
language[3] = 0; |
821 |
av_metadata_set2(&st->metadata, "language", language, 0); |
822 |
if (!strcmp(language, "nar") || !strcmp(language, "NAR")) |
823 |
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
824 |
} |
825 |
consumed += 15;
|
826 |
} |
827 |
} else if (!ff_guidcmp(g, ff_timestamp_guid)) { |
828 |
int stream_index = ff_find_stream_index(s, sid);
|
829 |
if (stream_index >= 0) { |
830 |
avio_skip(pb, 8);
|
831 |
wtv->pts = avio_rl64(pb); |
832 |
consumed += 16;
|
833 |
if (wtv->pts == -1) |
834 |
wtv->pts = AV_NOPTS_VALUE; |
835 |
else {
|
836 |
wtv->last_valid_pts = wtv->pts; |
837 |
if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
|
838 |
wtv->epoch = wtv->pts; |
839 |
if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
|
840 |
#define WTV_PAD8(x) (((x) + 7) & ~7) |
841 |
avio_skip(pb, WTV_PAD8(len) - consumed); |
842 |
return 0; |
843 |
} |
844 |
} |
845 |
} |
846 |
} else if (!ff_guidcmp(g, ff_data_guid)) { |
847 |
int stream_index = ff_find_stream_index(s, sid);
|
848 |
if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) { |
849 |
WtvStream *wst = s->streams[stream_index]->priv_data; |
850 |
wst->seen_data = 1;
|
851 |
if (len_ptr) {
|
852 |
*len_ptr = len; |
853 |
} |
854 |
return stream_index;
|
855 |
} |
856 |
} else if ( |
857 |
!ff_guidcmp(g, /* DSATTRIB_CAPTURE_STREAMTIME */ (const ff_asf_guid){0x14,0x56,0x1A,0x0C,0xCD,0x30,0x40,0x4F,0xBC,0xBF,0xD0,0x3E,0x52,0x30,0x62,0x07}) || |
858 |
!ff_guidcmp(g, /* DSATTRIB_PicSampleSeq */ (const ff_asf_guid){0x02,0xAE,0x5B,0x2F,0x8F,0x7B,0x60,0x4F,0x82,0xD6,0xE4,0xEA,0x2F,0x1F,0x4C,0x99}) || |
859 |
!ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) || |
860 |
!ff_guidcmp(g, /* dvr_ms_vid_frame_rep_data */ (const ff_asf_guid){0xCC,0x32,0x64,0xDD,0x29,0xE2,0xDB,0x40,0x80,0xF6,0xD2,0x63,0x28,0xD2,0x76,0x1F}) || |
861 |
!ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) || |
862 |
!ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) || |
863 |
!ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) || |
864 |
!ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) || |
865 |
!ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) || |
866 |
!ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) || |
867 |
!ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || |
868 |
!ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || |
869 |
!ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || |
870 |
!ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
871 |
!ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || |
872 |
!ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
873 |
!ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
874 |
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) { |
875 |
//ignore known guids
|
876 |
} else
|
877 |
av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g)); |
878 |
|
879 |
avio_skip(pb, WTV_PAD8(len) - consumed); |
880 |
} |
881 |
return AVERROR_EOF;
|
882 |
} |
883 |
|
884 |
/* declare utf16le strings */
|
885 |
#define _ , 0, |
886 |
static const uint8_t timeline_le16[] = |
887 |
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0}; |
888 |
static const uint8_t table_0_entries_legacy_attrib_le16[] = |
889 |
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0}; |
890 |
static const uint8_t table_0_entries_time_le16[] = |
891 |
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0}; |
892 |
static const uint8_t timeline_table_0_entries_Events_le16[] = |
893 |
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0}; |
894 |
#undef _
|
895 |
|
896 |
static int read_header(AVFormatContext *s, AVFormatParameters *ap) |
897 |
{ |
898 |
WtvContext *wtv = s->priv_data; |
899 |
int root_sector, root_size;
|
900 |
uint8_t root[WTV_SECTOR_SIZE]; |
901 |
AVIOContext *pb; |
902 |
int64_t timeline_pos; |
903 |
int ret;
|
904 |
|
905 |
wtv->epoch = |
906 |
wtv->pts = |
907 |
wtv->last_valid_pts = AV_NOPTS_VALUE; |
908 |
|
909 |
/* read root directory sector */
|
910 |
avio_skip(s->pb, 0x30);
|
911 |
root_size = avio_rl32(s->pb); |
912 |
if (root_size > sizeof(root)) { |
913 |
av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
|
914 |
return AVERROR_INVALIDDATA;
|
915 |
} |
916 |
avio_skip(s->pb, 4);
|
917 |
root_sector = avio_rl32(s->pb); |
918 |
|
919 |
avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET); |
920 |
root_size = avio_read(s->pb, root, root_size); |
921 |
if (root_size < 0) |
922 |
return AVERROR_INVALIDDATA;
|
923 |
|
924 |
/* parse chunks up until first data chunk */
|
925 |
wtv->pb = wtvfile_open(s, root, root_size, timeline_le16); |
926 |
if (!wtv->pb) {
|
927 |
av_log(s, AV_LOG_ERROR, "timeline data missing\n");
|
928 |
return AVERROR_INVALIDDATA;
|
929 |
} |
930 |
|
931 |
ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); |
932 |
if (ret < 0) |
933 |
return ret;
|
934 |
avio_seek(wtv->pb, -32, SEEK_CUR);
|
935 |
|
936 |
timeline_pos = avio_tell(s->pb); // save before opening another file
|
937 |
|
938 |
/* read metadata */
|
939 |
pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16); |
940 |
if (pb) {
|
941 |
parse_legacy_attrib(s, pb); |
942 |
wtvfile_close(pb); |
943 |
} |
944 |
|
945 |
/* read seek index */
|
946 |
if (s->nb_streams) {
|
947 |
AVStream *st = s->streams[0];
|
948 |
pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16); |
949 |
if (pb) {
|
950 |
while(1) { |
951 |
uint64_t timestamp = avio_rl64(pb); |
952 |
uint64_t frame_nb = avio_rl64(pb); |
953 |
if (url_feof(pb))
|
954 |
break;
|
955 |
ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size, |
956 |
0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME); |
957 |
} |
958 |
wtvfile_close(pb); |
959 |
|
960 |
if (wtv->nb_index_entries) {
|
961 |
pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16); |
962 |
if (pb) {
|
963 |
int i;
|
964 |
while (1) { |
965 |
uint64_t frame_nb = avio_rl64(pb); |
966 |
uint64_t position = avio_rl64(pb); |
967 |
if (url_feof(pb))
|
968 |
break;
|
969 |
for (i = wtv->nb_index_entries - 1; i >= 0; i--) { |
970 |
AVIndexEntry *e = wtv->index_entries + i; |
971 |
if (frame_nb > e->size)
|
972 |
break;
|
973 |
if (position > e->pos)
|
974 |
e->pos = position; |
975 |
} |
976 |
} |
977 |
wtvfile_close(pb); |
978 |
st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
|
979 |
} |
980 |
} |
981 |
} |
982 |
} |
983 |
|
984 |
avio_seek(s->pb, timeline_pos, SEEK_SET); |
985 |
return 0; |
986 |
} |
987 |
|
988 |
static int read_packet(AVFormatContext *s, AVPacket *pkt) |
989 |
{ |
990 |
WtvContext *wtv = s->priv_data; |
991 |
AVIOContext *pb = wtv->pb; |
992 |
int stream_index, len, ret;
|
993 |
|
994 |
stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
|
995 |
if (stream_index < 0) |
996 |
return stream_index;
|
997 |
|
998 |
ret = av_get_packet(pb, pkt, len - 32);
|
999 |
if (ret < 0) |
1000 |
return ret;
|
1001 |
pkt->stream_index = stream_index; |
1002 |
pkt->pts = wtv->pts; |
1003 |
avio_skip(pb, WTV_PAD8(len) - len); |
1004 |
return 0; |
1005 |
} |
1006 |
|
1007 |
static int read_seek(AVFormatContext *s, int stream_index, |
1008 |
int64_t ts, int flags)
|
1009 |
{ |
1010 |
WtvContext *wtv = s->priv_data; |
1011 |
AVIOContext *pb = wtv->pb; |
1012 |
AVStream *st = s->streams[0];
|
1013 |
int64_t ts_relative; |
1014 |
int i;
|
1015 |
|
1016 |
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
|
1017 |
return AVERROR(ENOSYS);
|
1018 |
|
1019 |
/* timestamp adjustment is required because wtv->pts values are absolute,
|
1020 |
* whereas AVIndexEntry->timestamp values are relative to epoch. */
|
1021 |
ts_relative = ts; |
1022 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
1023 |
ts_relative -= wtv->epoch; |
1024 |
|
1025 |
i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags); |
1026 |
if (i < 0) { |
1027 |
if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
|
1028 |
avio_seek(pb, 0, SEEK_SET);
|
1029 |
else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) |
1030 |
avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
|
1031 |
if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) |
1032 |
return AVERROR(ERANGE);
|
1033 |
return 0; |
1034 |
} |
1035 |
wtv->pts = wtv->index_entries[i].timestamp; |
1036 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
1037 |
wtv->pts += wtv->epoch; |
1038 |
wtv->last_valid_pts = wtv->pts; |
1039 |
avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); |
1040 |
return 0; |
1041 |
} |
1042 |
|
1043 |
static int read_close(AVFormatContext *s) |
1044 |
{ |
1045 |
WtvContext *wtv = s->priv_data; |
1046 |
wtvfile_close(wtv->pb); |
1047 |
return 0; |
1048 |
} |
1049 |
|
1050 |
AVInputFormat ff_wtv_demuxer = { |
1051 |
.name = "wtv",
|
1052 |
.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
|
1053 |
.priv_data_size = sizeof(WtvContext),
|
1054 |
.read_probe = read_probe, |
1055 |
.read_header = read_header, |
1056 |
.read_packet = read_packet, |
1057 |
.read_seek = read_seek, |
1058 |
.read_close = read_close, |
1059 |
.flags = AVFMT_SHOW_IDS, |
1060 |
}; |