ffmpeg / libavformat / wtv.c @ 66e5b1df
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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 "riff.h" |
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#include "asf.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_GUID \
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"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
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#define ARG_GUID(g) \
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g[0],g[1],g[2],g[3],g[4],g[5],g[6],g[7],g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] |
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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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#define WTV_SECTOR_BITS 12 |
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#define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS) |
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#define WTV_BIGSECTOR_BITS 18 |
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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 || url_ferror(pb))
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return -1; |
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if (wf->position >= wf->length || pb->eof_reached)
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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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static const ff_asf_guid dir_entry_guid = |
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{0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D};
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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, dir_entry_guid)) {
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av_log(s, AV_LOG_ERROR, "unknown guid "PRI_GUID", expected dir_entry_guid; " |
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"remaining directory entries ignored\n", 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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typedef struct { |
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enum CodecID id;
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ff_asf_guid guid; |
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} AVCodecGuid; |
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static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid) |
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{
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int i;
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for (i = 0; guids[i].id != CODEC_ID_NONE; i++) { |
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if (!ff_guidcmp(guids[i].guid, guid))
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return guids[i].id;
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} |
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return CODEC_ID_NONE;
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} |
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/* WTV GUIDs */
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static const ff_asf_guid wtv_guid = |
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{0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
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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 timestamp_guid = |
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{0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97};
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static const ff_asf_guid data_guid = |
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{0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
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static const ff_asf_guid stream_guid = |
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{0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
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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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#define MEDIASUBTYPE_BASE_GUID \
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0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71 |
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|
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/* Media types */
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static const ff_asf_guid mediatype_audio = |
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{'a','u','d','s',MEDIASUBTYPE_BASE_GUID};
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static const ff_asf_guid mediatype_video = |
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{'v','i','d','s',MEDIASUBTYPE_BASE_GUID};
|
| 388 |
static const ff_asf_guid mediasubtype_mpeg1payload = |
| 389 |
{0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70};
|
| 390 |
static const ff_asf_guid mediatype_mpeg2_sections = |
| 391 |
{0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5};
|
| 392 |
static const ff_asf_guid mediatype_mpeg2_pes = |
| 393 |
{0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
|
| 394 |
static const ff_asf_guid mediatype_mstvcaption = |
| 395 |
{0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1};
|
| 396 |
|
| 397 |
/* Media subtypes */
|
| 398 |
static const ff_asf_guid mediasubtype_cpfilters_processed = |
| 399 |
{0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D};
|
| 400 |
static const ff_asf_guid mediasubtype_dvb_subtitle = |
| 401 |
{0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F};
|
| 402 |
static const ff_asf_guid mediasubtype_teletext = |
| 403 |
{0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
|
| 404 |
static const ff_asf_guid mediasubtype_dtvccdata = |
| 405 |
{0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A};
|
| 406 |
static const ff_asf_guid mediasubtype_mpeg2_sections = |
| 407 |
{0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61};
|
| 408 |
|
| 409 |
/* Formats */
|
| 410 |
static const ff_asf_guid format_cpfilters_processed = |
| 411 |
{0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A};
|
| 412 |
static const ff_asf_guid format_waveformatex = |
| 413 |
{0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A};
|
| 414 |
static const ff_asf_guid format_videoinfo2 = |
| 415 |
{0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA};
|
| 416 |
static const ff_asf_guid format_mpeg2_video = |
| 417 |
{0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA};
|
| 418 |
static const ff_asf_guid format_none = |
| 419 |
{0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96};
|
| 420 |
|
| 421 |
static const AVCodecGuid video_guids[] = { |
| 422 |
{CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
|
| 423 |
{CODEC_ID_NONE}
|
| 424 |
}; |
| 425 |
|
| 426 |
static const AVCodecGuid audio_guids[] = { |
| 427 |
{CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
|
| 428 |
{CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}},
|
| 429 |
{CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}},
|
| 430 |
{CODEC_ID_NONE}
|
| 431 |
}; |
| 432 |
|
| 433 |
static int read_probe(AVProbeData *p) |
| 434 |
{
|
| 435 |
return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX; |
| 436 |
} |
| 437 |
|
| 438 |
/**
|
| 439 |
* Convert win32 FILETIME to ISO-8601 string
|
| 440 |
*/
|
| 441 |
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value) |
| 442 |
{
|
| 443 |
time_t t = (value / 10000000LL) - 11644473600LL; |
| 444 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
| 445 |
} |
| 446 |
|
| 447 |
/**
|
| 448 |
* Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
|
| 449 |
*/
|
| 450 |
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value) |
| 451 |
{
|
| 452 |
time_t t = (value / 10000000LL) - 719162LL*86400LL; |
| 453 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
| 454 |
} |
| 455 |
|
| 456 |
/**
|
| 457 |
* Convert OLE DATE to ISO-8601 string
|
| 458 |
*/
|
| 459 |
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value) |
| 460 |
{
|
| 461 |
time_t t = 631112400LL + 86400*av_int2dbl(value); |
| 462 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
| 463 |
} |
| 464 |
|
| 465 |
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) |
| 466 |
{
|
| 467 |
char mime[1024]; |
| 468 |
char description[1024]; |
| 469 |
unsigned int filesize; |
| 470 |
AVStream *st; |
| 471 |
int64_t pos = avio_tell(pb); |
| 472 |
|
| 473 |
avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
|
| 474 |
if (strcmp(mime, "image/jpeg")) |
| 475 |
goto done;
|
| 476 |
|
| 477 |
avio_r8(pb); |
| 478 |
avio_get_str16le(pb, INT_MAX, description, sizeof(description));
|
| 479 |
filesize = avio_rl32(pb); |
| 480 |
if (!filesize)
|
| 481 |
goto done;
|
| 482 |
|
| 483 |
st = av_new_stream(s, 0);
|
| 484 |
if (!st)
|
| 485 |
goto done;
|
| 486 |
av_metadata_set2(&st->metadata, "title", description, 0); |
| 487 |
st->codec->codec_id = CODEC_ID_MJPEG; |
| 488 |
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; |
| 489 |
st->codec->extradata = av_mallocz(filesize); |
| 490 |
if (!st->codec->extradata)
|
| 491 |
goto done;
|
| 492 |
st->codec->extradata_size = filesize; |
| 493 |
avio_read(pb, st->codec->extradata, filesize); |
| 494 |
done:
|
| 495 |
avio_seek(pb, pos + length, SEEK_SET); |
| 496 |
} |
| 497 |
|
| 498 |
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length) |
| 499 |
{
|
| 500 |
int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1; |
| 501 |
char *buf = av_malloc(buf_size);
|
| 502 |
if (!buf)
|
| 503 |
return;
|
| 504 |
|
| 505 |
if (type == 0 && length == 4) { |
| 506 |
snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
|
| 507 |
} else if (type == 1) { |
| 508 |
avio_get_str16le(pb, length, buf, buf_size); |
| 509 |
if (!strlen(buf)) {
|
| 510 |
av_free(buf); |
| 511 |
return;
|
| 512 |
} |
| 513 |
} else if (type == 3 && length == 4) { |
| 514 |
strcpy(buf, avio_rl32(pb) ? "true" : "false"); |
| 515 |
} else if (type == 4 && length == 8) { |
| 516 |
int64_t num = avio_rl64(pb); |
| 517 |
if (!strcmp(key, "WM/EncodingTime") || |
| 518 |
!strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
|
| 519 |
filetime_to_iso8601(buf, buf_size, num); |
| 520 |
else if (!strcmp(key, "WM/WMRVEncodeTime") || |
| 521 |
!strcmp(key, "WM/WMRVEndTime"))
|
| 522 |
crazytime_to_iso8601(buf, buf_size, num); |
| 523 |
else if (!strcmp(key, "WM/WMRVExpirationDate")) |
| 524 |
oledate_to_iso8601(buf, buf_size, num); |
| 525 |
else if (!strcmp(key, "WM/WMRVBitrate")) |
| 526 |
snprintf(buf, buf_size, "%f", av_int2dbl(num));
|
| 527 |
else
|
| 528 |
snprintf(buf, buf_size, "%"PRIi64, num);
|
| 529 |
} else if (type == 5 && length == 2) { |
| 530 |
snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
|
| 531 |
} else if (type == 6 && length == 16) { |
| 532 |
ff_asf_guid guid; |
| 533 |
avio_read(pb, guid, 16);
|
| 534 |
snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid)); |
| 535 |
} else if (type == 2 && !strcmp(key, "WM/Picture")) { |
| 536 |
get_attachment(s, pb, length); |
| 537 |
av_freep(&buf); |
| 538 |
return;
|
| 539 |
} else {
|
| 540 |
av_freep(&buf); |
| 541 |
av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
|
| 542 |
avio_seek(pb, length, SEEK_CUR); |
| 543 |
return;
|
| 544 |
} |
| 545 |
|
| 546 |
av_metadata_set2(&s->metadata, key, buf, 0);
|
| 547 |
av_freep(&buf); |
| 548 |
} |
| 549 |
|
| 550 |
/**
|
| 551 |
* Parse metadata entries
|
| 552 |
*/
|
| 553 |
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb) |
| 554 |
{
|
| 555 |
ff_asf_guid guid; |
| 556 |
int length, type;
|
| 557 |
while(!pb->eof_reached) {
|
| 558 |
char key[1024]; |
| 559 |
ff_get_guid(pb, &guid); |
| 560 |
type = avio_rl32(pb); |
| 561 |
length = avio_rl32(pb); |
| 562 |
if (!length)
|
| 563 |
break;
|
| 564 |
if (ff_guidcmp(&guid, metadata_guid)) {
|
| 565 |
av_log(s, AV_LOG_WARNING, "unknown guid "PRI_GUID", expected metadata_guid; " |
| 566 |
"remaining metadata entries ignored\n", ARG_GUID(guid));
|
| 567 |
break;
|
| 568 |
} |
| 569 |
avio_get_str16le(pb, INT_MAX, key, sizeof(key));
|
| 570 |
get_tag(s, pb, key, type, length); |
| 571 |
} |
| 572 |
|
| 573 |
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
|
| 574 |
} |
| 575 |
|
| 576 |
/**
|
| 577 |
* parse VIDEOINFOHEADER2 structure
|
| 578 |
* @return bytes consumed
|
| 579 |
*/
|
| 580 |
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) |
| 581 |
{
|
| 582 |
WtvContext *wtv = s->priv_data; |
| 583 |
AVIOContext *pb = wtv->pb; |
| 584 |
|
| 585 |
avio_seek(pb, 72, SEEK_CUR); // picture aspect ratio is unreliable |
| 586 |
ff_get_bmp_header(pb, st); |
| 587 |
|
| 588 |
return 72 + 40; |
| 589 |
} |
| 590 |
|
| 591 |
/**
|
| 592 |
* Parse MPEG1WAVEFORMATEX extradata structure
|
| 593 |
*/
|
| 594 |
static void parse_mpeg1waveformatex(AVStream *st) |
| 595 |
{
|
| 596 |
/* fwHeadLayer */
|
| 597 |
switch (AV_RL16(st->codec->extradata)) {
|
| 598 |
case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break; |
| 599 |
case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break; |
| 600 |
case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break; |
| 601 |
} |
| 602 |
|
| 603 |
st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ |
| 604 |
|
| 605 |
/* dwHeadMode */
|
| 606 |
switch (AV_RL16(st->codec->extradata + 6)) { |
| 607 |
case 1 : case 2 : case 4 : st->codec->channels = 2; break; |
| 608 |
case 8 : st->codec->channels = 1; break; |
| 609 |
} |
| 610 |
} |
| 611 |
|
| 612 |
/**
|
| 613 |
* Initialise stream
|
| 614 |
* @param st Stream to initialise, or NULL to create and initialise new stream
|
| 615 |
* @return NULL on error
|
| 616 |
*/
|
| 617 |
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) |
| 618 |
{
|
| 619 |
if (st) {
|
| 620 |
if (st->codec->extradata) {
|
| 621 |
av_freep(&st->codec->extradata); |
| 622 |
st->codec->extradata_size = 0;
|
| 623 |
} |
| 624 |
} else {
|
| 625 |
WtvStream *wst = av_mallocz(sizeof(WtvStream));
|
| 626 |
if (!wst)
|
| 627 |
return NULL; |
| 628 |
st = av_new_stream(s, sid); |
| 629 |
if (!st)
|
| 630 |
return NULL; |
| 631 |
st->priv_data = wst; |
| 632 |
} |
| 633 |
st->codec->codec_type = codec_type; |
| 634 |
st->need_parsing = AVSTREAM_PARSE_FULL; |
| 635 |
av_set_pts_info(st, 64, 1, 10000000); |
| 636 |
return st;
|
| 637 |
} |
| 638 |
|
| 639 |
/**
|
| 640 |
* parse Media Type structure and populate stream
|
| 641 |
* @param st Stream, or NULL to create new stream
|
| 642 |
* @param mediatype Mediatype GUID
|
| 643 |
* @param subtype Subtype GUID
|
| 644 |
* @param formattype Format GUID
|
| 645 |
* @param size Size of format buffer
|
| 646 |
* @return NULL on error
|
| 647 |
*/
|
| 648 |
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, |
| 649 |
ff_asf_guid mediatype, ff_asf_guid subtype, |
| 650 |
ff_asf_guid formattype, int size)
|
| 651 |
{
|
| 652 |
WtvContext *wtv = s->priv_data; |
| 653 |
AVIOContext *pb = wtv->pb; |
| 654 |
if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
|
| 655 |
!ff_guidcmp(formattype, format_cpfilters_processed)) {
|
| 656 |
ff_asf_guid actual_subtype; |
| 657 |
ff_asf_guid actual_formattype; |
| 658 |
|
| 659 |
if (size < 32) { |
| 660 |
av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
|
| 661 |
avio_seek(pb, size, SEEK_CUR); |
| 662 |
return NULL; |
| 663 |
} |
| 664 |
|
| 665 |
avio_seek(pb, size - 32, SEEK_CUR);
|
| 666 |
ff_get_guid(pb, &actual_subtype); |
| 667 |
ff_get_guid(pb, &actual_formattype); |
| 668 |
avio_seek(pb, -size, SEEK_CUR); |
| 669 |
|
| 670 |
st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
|
| 671 |
avio_seek(pb, 32, SEEK_CUR);
|
| 672 |
return st;
|
| 673 |
} else if (!ff_guidcmp(mediatype, mediatype_audio)) { |
| 674 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); |
| 675 |
if (!st)
|
| 676 |
return NULL; |
| 677 |
if (!ff_guidcmp(formattype, format_waveformatex)) {
|
| 678 |
ff_get_wav_header(pb, st->codec, size); |
| 679 |
} else {
|
| 680 |
if (ff_guidcmp(formattype, format_none))
|
| 681 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
| 682 |
avio_seek(pb, size, SEEK_CUR); |
| 683 |
} |
| 684 |
|
| 685 |
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { |
| 686 |
st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); |
| 687 |
} else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { |
| 688 |
if (st->codec->extradata && st->codec->extradata_size >= 22) |
| 689 |
parse_mpeg1waveformatex(st); |
| 690 |
else
|
| 691 |
av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
|
| 692 |
} else {
|
| 693 |
st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype); |
| 694 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
| 695 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); |
| 696 |
} |
| 697 |
return st;
|
| 698 |
} else if (!ff_guidcmp(mediatype, mediatype_video)) { |
| 699 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); |
| 700 |
if (!st)
|
| 701 |
return NULL; |
| 702 |
if (!ff_guidcmp(formattype, format_videoinfo2)) {
|
| 703 |
int consumed = parse_videoinfoheader2(s, st);
|
| 704 |
avio_seek(pb, FFMAX(size - consumed, 0), SEEK_CUR);
|
| 705 |
} else if (!ff_guidcmp(formattype, format_mpeg2_video)) { |
| 706 |
int consumed = parse_videoinfoheader2(s, st);
|
| 707 |
avio_seek(pb, FFMAX(size - consumed, 0), SEEK_CUR);
|
| 708 |
} else {
|
| 709 |
if (ff_guidcmp(formattype, format_none))
|
| 710 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
| 711 |
avio_seek(pb, size, SEEK_CUR); |
| 712 |
} |
| 713 |
|
| 714 |
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { |
| 715 |
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); |
| 716 |
} else {
|
| 717 |
st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype); |
| 718 |
} |
| 719 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
| 720 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); |
| 721 |
return st;
|
| 722 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && |
| 723 |
!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
|
| 724 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
| 725 |
if (!st)
|
| 726 |
return NULL; |
| 727 |
if (ff_guidcmp(formattype, format_none))
|
| 728 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
| 729 |
avio_seek(pb, size, SEEK_CUR); |
| 730 |
st->codec->codec_id = CODEC_ID_DVB_SUBTITLE; |
| 731 |
return st;
|
| 732 |
} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && |
| 733 |
(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
|
| 734 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
| 735 |
if (!st)
|
| 736 |
return NULL; |
| 737 |
if (ff_guidcmp(formattype, format_none))
|
| 738 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
| 739 |
avio_seek(pb, size, SEEK_CUR); |
| 740 |
st->codec->codec_id = CODEC_ID_DVB_TELETEXT; |
| 741 |
return st;
|
| 742 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && |
| 743 |
!ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
|
| 744 |
if (ff_guidcmp(formattype, format_none))
|
| 745 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
| 746 |
avio_seek(pb, size, SEEK_CUR); |
| 747 |
return NULL; |
| 748 |
} |
| 749 |
|
| 750 |
av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
|
| 751 |
", subtype:"PRI_GUID", formattype:"PRI_GUID"\n", |
| 752 |
ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype)); |
| 753 |
avio_seek(pb, size, SEEK_CUR); |
| 754 |
return NULL; |
| 755 |
} |
| 756 |
|
| 757 |
enum {
|
| 758 |
SEEK_TO_DATA = 0,
|
| 759 |
SEEK_TO_PTS, |
| 760 |
}; |
| 761 |
|
| 762 |
/**
|
| 763 |
* Parse WTV chunks
|
| 764 |
* @param mode SEEK_TO_DATA or SEEK_TO_PTS
|
| 765 |
* @param seekts timestamp
|
| 766 |
* @param[out] len Length of data chunk
|
| 767 |
* @return stream index of data chunk, or <0 on error
|
| 768 |
*/
|
| 769 |
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) |
| 770 |
{
|
| 771 |
WtvContext *wtv = s->priv_data; |
| 772 |
AVIOContext *pb = wtv->pb; |
| 773 |
while (!pb->eof_reached) {
|
| 774 |
ff_asf_guid g; |
| 775 |
int len, sid, consumed;
|
| 776 |
|
| 777 |
ff_get_guid(pb, &g); |
| 778 |
len = avio_rl32(pb); |
| 779 |
if (len < 32) |
| 780 |
break;
|
| 781 |
sid = avio_rl32(pb) & 0x7FFF;
|
| 782 |
avio_seek(pb, 8, SEEK_CUR);
|
| 783 |
consumed = 32;
|
| 784 |
|
| 785 |
if (!ff_guidcmp(g, stream_guid)) {
|
| 786 |
if (ff_find_stream_index(s, sid) < 0) { |
| 787 |
ff_asf_guid mediatype, subtype, formattype; |
| 788 |
int size;
|
| 789 |
avio_seek(pb, 28, SEEK_CUR);
|
| 790 |
ff_get_guid(pb, &mediatype); |
| 791 |
ff_get_guid(pb, &subtype); |
| 792 |
avio_seek(pb, 12, SEEK_CUR);
|
| 793 |
ff_get_guid(pb, &formattype); |
| 794 |
size = avio_rl32(pb); |
| 795 |
parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
|
| 796 |
consumed += 92 + size;
|
| 797 |
} |
| 798 |
} else if (!ff_guidcmp(g, stream2_guid)) { |
| 799 |
int stream_index = ff_find_stream_index(s, sid);
|
| 800 |
if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { |
| 801 |
ff_asf_guid mediatype, subtype, formattype; |
| 802 |
int size;
|
| 803 |
avio_seek(pb, 12, SEEK_CUR);
|
| 804 |
ff_get_guid(pb, &mediatype); |
| 805 |
ff_get_guid(pb, &subtype); |
| 806 |
avio_seek(pb, 12, SEEK_CUR);
|
| 807 |
ff_get_guid(pb, &formattype); |
| 808 |
size = avio_rl32(pb); |
| 809 |
parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); |
| 810 |
consumed += 76 + size;
|
| 811 |
} |
| 812 |
} else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || |
| 813 |
!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
| 814 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || |
| 815 |
!ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || |
| 816 |
!ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || |
| 817 |
!ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
|
| 818 |
int stream_index = ff_find_stream_index(s, sid);
|
| 819 |
if (stream_index >= 0) { |
| 820 |
AVStream *st = s->streams[stream_index]; |
| 821 |
uint8_t buf[258];
|
| 822 |
const uint8_t *pbuf = buf;
|
| 823 |
int buf_size;
|
| 824 |
|
| 825 |
avio_seek(pb, 8, SEEK_CUR);
|
| 826 |
consumed += 8;
|
| 827 |
if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
|
| 828 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
|
| 829 |
avio_seek(pb, 6, SEEK_CUR);
|
| 830 |
consumed += 6;
|
| 831 |
} |
| 832 |
|
| 833 |
buf_size = FFMIN(len - consumed, sizeof(buf));
|
| 834 |
avio_read(pb, buf, buf_size); |
| 835 |
consumed += buf_size; |
| 836 |
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0); |
| 837 |
} |
| 838 |
} else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) { |
| 839 |
int stream_index = ff_find_stream_index(s, sid);
|
| 840 |
if (stream_index >= 0) { |
| 841 |
AVStream *st = s->streams[stream_index]; |
| 842 |
int audio_type;
|
| 843 |
avio_seek(pb, 8, SEEK_CUR);
|
| 844 |
audio_type = avio_r8(pb); |
| 845 |
if (audio_type == 2) |
| 846 |
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; |
| 847 |
else if (audio_type == 3) |
| 848 |
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
| 849 |
consumed += 9;
|
| 850 |
} |
| 851 |
} else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { |
| 852 |
int stream_index = ff_find_stream_index(s, sid);
|
| 853 |
if (stream_index >= 0) { |
| 854 |
avio_seek(pb, 12, SEEK_CUR);
|
| 855 |
if (avio_rl32(pb))
|
| 856 |
av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
|
| 857 |
consumed += 16;
|
| 858 |
} |
| 859 |
} else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { |
| 860 |
int stream_index = ff_find_stream_index(s, sid);
|
| 861 |
if (stream_index >= 0) { |
| 862 |
AVStream *st = s->streams[stream_index]; |
| 863 |
uint8_t language[4];
|
| 864 |
avio_seek(pb, 12, SEEK_CUR);
|
| 865 |
avio_read(pb, language, 3);
|
| 866 |
if (language[0]) { |
| 867 |
language[3] = 0; |
| 868 |
av_metadata_set2(&st->metadata, "language", language, 0); |
| 869 |
if (!strcmp(language, "nar") || !strcmp(language, "NAR")) |
| 870 |
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; |
| 871 |
} |
| 872 |
consumed += 15;
|
| 873 |
} |
| 874 |
} else if (!ff_guidcmp(g, timestamp_guid)) { |
| 875 |
int stream_index = ff_find_stream_index(s, sid);
|
| 876 |
if (stream_index >= 0) { |
| 877 |
avio_seek(pb, 8, SEEK_CUR);
|
| 878 |
wtv->pts = avio_rl64(pb); |
| 879 |
consumed += 16;
|
| 880 |
if (wtv->pts == -1) |
| 881 |
wtv->pts = AV_NOPTS_VALUE; |
| 882 |
else {
|
| 883 |
wtv->last_valid_pts = wtv->pts; |
| 884 |
if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
|
| 885 |
wtv->epoch = wtv->pts; |
| 886 |
if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
|
| 887 |
#define WTV_PAD8(x) (((x) + 7) & ~7) |
| 888 |
avio_seek(pb, WTV_PAD8(len) - consumed, SEEK_CUR); |
| 889 |
return 0; |
| 890 |
} |
| 891 |
} |
| 892 |
} |
| 893 |
} else if (!ff_guidcmp(g, data_guid)) { |
| 894 |
int stream_index = ff_find_stream_index(s, sid);
|
| 895 |
if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32) { |
| 896 |
WtvStream *wst = s->streams[stream_index]->priv_data; |
| 897 |
wst->seen_data = 1;
|
| 898 |
if (len_ptr) {
|
| 899 |
*len_ptr = len; |
| 900 |
} |
| 901 |
return stream_index;
|
| 902 |
} |
| 903 |
} else if ( |
| 904 |
!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}) || |
| 905 |
!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}) || |
| 906 |
!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}) || |
| 907 |
!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}) || |
| 908 |
!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}) || |
| 909 |
!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}) || |
| 910 |
!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}) || |
| 911 |
!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}) || |
| 912 |
!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}) || |
| 913 |
!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}) || |
| 914 |
!ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || |
| 915 |
!ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || |
| 916 |
!ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || |
| 917 |
!ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
| 918 |
!ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || |
| 919 |
!ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
| 920 |
!ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
| 921 |
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) { |
| 922 |
//ignore known guids
|
| 923 |
} else
|
| 924 |
av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g)); |
| 925 |
|
| 926 |
avio_seek(pb, WTV_PAD8(len) - consumed, SEEK_CUR); |
| 927 |
} |
| 928 |
return AVERROR_EOF;
|
| 929 |
} |
| 930 |
|
| 931 |
/* declare utf16le strings */
|
| 932 |
#define _ , 0, |
| 933 |
static const uint8_t timeline_le16[] = |
| 934 |
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0};
|
| 935 |
static const uint8_t table_0_entries_legacy_attrib_le16[] = |
| 936 |
{'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};
|
| 937 |
static const uint8_t table_0_entries_time_le16[] = |
| 938 |
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0};
|
| 939 |
static const uint8_t timeline_table_0_entries_Events_le16[] = |
| 940 |
{'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};
|
| 941 |
#undef _
|
| 942 |
|
| 943 |
static int read_header(AVFormatContext *s, AVFormatParameters *ap) |
| 944 |
{
|
| 945 |
WtvContext *wtv = s->priv_data; |
| 946 |
int root_sector, root_size;
|
| 947 |
uint8_t root[WTV_SECTOR_SIZE]; |
| 948 |
AVIOContext *pb; |
| 949 |
int64_t timeline_pos; |
| 950 |
int ret;
|
| 951 |
|
| 952 |
wtv->epoch = |
| 953 |
wtv->pts = |
| 954 |
wtv->last_valid_pts = AV_NOPTS_VALUE; |
| 955 |
|
| 956 |
/* read root directory sector */
|
| 957 |
avio_seek(s->pb, 0x30, SEEK_CUR);
|
| 958 |
root_size = avio_rl32(s->pb); |
| 959 |
if (root_size > sizeof(root)) { |
| 960 |
av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
|
| 961 |
return AVERROR_INVALIDDATA;
|
| 962 |
} |
| 963 |
avio_seek(s->pb, 4, SEEK_CUR);
|
| 964 |
root_sector = avio_rl32(s->pb); |
| 965 |
|
| 966 |
avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET); |
| 967 |
root_size = avio_read(s->pb, root, root_size); |
| 968 |
if (root_size < 0) |
| 969 |
return AVERROR_INVALIDDATA;
|
| 970 |
|
| 971 |
/* parse chunks up until first data chunk */
|
| 972 |
wtv->pb = wtvfile_open(s, root, root_size, timeline_le16); |
| 973 |
if (!wtv->pb) {
|
| 974 |
av_log(s, AV_LOG_ERROR, "timeline data missing\n");
|
| 975 |
return AVERROR_INVALIDDATA;
|
| 976 |
} |
| 977 |
|
| 978 |
ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); |
| 979 |
if (ret < 0) |
| 980 |
return ret;
|
| 981 |
avio_seek(wtv->pb, -32, SEEK_CUR);
|
| 982 |
|
| 983 |
timeline_pos = avio_tell(s->pb); // save before opening another file
|
| 984 |
|
| 985 |
/* read metadata */
|
| 986 |
pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16); |
| 987 |
if (pb) {
|
| 988 |
parse_legacy_attrib(s, pb); |
| 989 |
wtvfile_close(pb); |
| 990 |
} |
| 991 |
|
| 992 |
/* read seek index */
|
| 993 |
if (s->nb_streams) {
|
| 994 |
AVStream *st = s->streams[0];
|
| 995 |
pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16); |
| 996 |
if (pb) {
|
| 997 |
while(1) { |
| 998 |
uint64_t timestamp = avio_rl64(pb); |
| 999 |
uint64_t frame_nb = avio_rl64(pb); |
| 1000 |
if (pb->eof_reached)
|
| 1001 |
break;
|
| 1002 |
ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size, |
| 1003 |
0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME); |
| 1004 |
} |
| 1005 |
wtvfile_close(pb); |
| 1006 |
|
| 1007 |
if (wtv->nb_index_entries) {
|
| 1008 |
pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16); |
| 1009 |
if (pb) {
|
| 1010 |
int i;
|
| 1011 |
while (1) { |
| 1012 |
uint64_t frame_nb = avio_rl64(pb); |
| 1013 |
uint64_t position = avio_rl64(pb); |
| 1014 |
if (pb->eof_reached)
|
| 1015 |
break;
|
| 1016 |
for (i = wtv->nb_index_entries - 1; i >= 0; i--) { |
| 1017 |
AVIndexEntry *e = wtv->index_entries + i; |
| 1018 |
if (frame_nb > e->size)
|
| 1019 |
break;
|
| 1020 |
if (position > e->pos)
|
| 1021 |
e->pos = position; |
| 1022 |
} |
| 1023 |
} |
| 1024 |
wtvfile_close(pb); |
| 1025 |
st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
|
| 1026 |
} |
| 1027 |
} |
| 1028 |
} |
| 1029 |
} |
| 1030 |
|
| 1031 |
avio_seek(s->pb, timeline_pos, SEEK_SET); |
| 1032 |
return 0; |
| 1033 |
} |
| 1034 |
|
| 1035 |
static int read_packet(AVFormatContext *s, AVPacket *pkt) |
| 1036 |
{
|
| 1037 |
WtvContext *wtv = s->priv_data; |
| 1038 |
AVIOContext *pb = wtv->pb; |
| 1039 |
int stream_index, len, ret;
|
| 1040 |
|
| 1041 |
stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
|
| 1042 |
if (stream_index < 0) |
| 1043 |
return stream_index;
|
| 1044 |
|
| 1045 |
ret = av_get_packet(pb, pkt, len - 32);
|
| 1046 |
if (ret < 0) |
| 1047 |
return ret;
|
| 1048 |
pkt->stream_index = stream_index; |
| 1049 |
pkt->pts = wtv->pts; |
| 1050 |
avio_seek(pb, WTV_PAD8(len) - len, SEEK_CUR); |
| 1051 |
return 0; |
| 1052 |
} |
| 1053 |
|
| 1054 |
static int read_seek(AVFormatContext *s, int stream_index, |
| 1055 |
int64_t ts, int flags)
|
| 1056 |
{
|
| 1057 |
WtvContext *wtv = s->priv_data; |
| 1058 |
AVIOContext *pb = wtv->pb; |
| 1059 |
AVStream *st = s->streams[0];
|
| 1060 |
int64_t ts_relative; |
| 1061 |
int i;
|
| 1062 |
|
| 1063 |
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
|
| 1064 |
return AVERROR_NOTSUPP;
|
| 1065 |
|
| 1066 |
/* timestamp adjustment is required because wtv->pts values are absolute,
|
| 1067 |
* whereas AVIndexEntry->timestamp values are relative to epoch. */
|
| 1068 |
ts_relative = ts; |
| 1069 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
| 1070 |
ts_relative -= wtv->epoch; |
| 1071 |
|
| 1072 |
i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags); |
| 1073 |
if (i < 0) { |
| 1074 |
if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
|
| 1075 |
avio_seek(pb, 0, SEEK_SET);
|
| 1076 |
else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) |
| 1077 |
avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
|
| 1078 |
if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) |
| 1079 |
return AVERROR(ERANGE);
|
| 1080 |
return 0; |
| 1081 |
} |
| 1082 |
wtv->pts = wtv->index_entries[i].timestamp; |
| 1083 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
| 1084 |
wtv->pts += wtv->epoch; |
| 1085 |
wtv->last_valid_pts = wtv->pts; |
| 1086 |
avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); |
| 1087 |
return 0; |
| 1088 |
} |
| 1089 |
|
| 1090 |
static int read_close(AVFormatContext *s) |
| 1091 |
{
|
| 1092 |
WtvContext *wtv = s->priv_data; |
| 1093 |
wtvfile_close(wtv->pb); |
| 1094 |
return 0; |
| 1095 |
} |
| 1096 |
|
| 1097 |
AVInputFormat ff_wtv_demuxer = {
|
| 1098 |
.name = "wtv",
|
| 1099 |
.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
|
| 1100 |
.priv_data_size = sizeof(WtvContext),
|
| 1101 |
.read_probe = read_probe, |
| 1102 |
.read_header = read_header, |
| 1103 |
.read_packet = read_packet, |
| 1104 |
.read_seek = read_seek, |
| 1105 |
.read_close = read_close, |
| 1106 |
.flags = AVFMT_SHOW_IDS, |
| 1107 |
}; |