1059 lines
38 KiB
C
1059 lines
38 KiB
C
/*
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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.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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} 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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} 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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} 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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wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS;
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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 initial 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 + (int64_t)name_size > buf_end || name_size<0) {
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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_freep(&pb->opaque);
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av_freep(&pb->buffer);
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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 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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/* Media subtypes */
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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};
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/* Formats */
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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 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;
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}
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/**
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* Convert win32 FILETIME to ISO-8601 string
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* @return <0 on error
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*/
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static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
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{
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time_t t = (value / 10000000LL) - 11644473600LL;
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struct tm *tm = gmtime(&t);
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if (!tm)
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return -1;
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strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
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return 0;
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}
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/**
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* Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
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* @return <0 on error
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*/
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static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
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{
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time_t t = (value / 10000000LL) - 719162LL*86400LL;
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struct tm *tm = gmtime(&t);
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if (!tm)
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return -1;
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strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
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return 0;
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}
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/**
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* Convert OLE DATE to ISO-8601 string
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* @return <0 on error
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*/
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static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
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{
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time_t t = (av_int2double(value) - 25569.0) * 86400;
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struct tm *result= gmtime(&t);
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if (!result)
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return -1;
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strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", result);
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return 0;
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}
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static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
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{
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char mime[1024];
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char description[1024];
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unsigned int filesize;
|
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AVStream *st;
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int64_t pos = avio_tell(pb);
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|
|
avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
|
|
if (strcmp(mime, "image/jpeg"))
|
|
goto done;
|
|
|
|
avio_r8(pb);
|
|
avio_get_str16le(pb, INT_MAX, description, sizeof(description));
|
|
filesize = avio_rl32(pb);
|
|
if (!filesize)
|
|
goto done;
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
goto done;
|
|
av_dict_set(&st->metadata, "title", description, 0);
|
|
st->codec->codec_id = CODEC_ID_MJPEG;
|
|
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
|
|
st->codec->extradata = av_mallocz(filesize);
|
|
if (!st->codec->extradata)
|
|
goto done;
|
|
st->codec->extradata_size = filesize;
|
|
avio_read(pb, st->codec->extradata, filesize);
|
|
done:
|
|
avio_seek(pb, pos + length, SEEK_SET);
|
|
}
|
|
|
|
static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
|
|
{
|
|
int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1;
|
|
char *buf = av_malloc(buf_size);
|
|
if (!buf)
|
|
return;
|
|
|
|
if (type == 0 && length == 4) {
|
|
snprintf(buf, buf_size, "%"PRIi32, avio_rl32(pb));
|
|
} else if (type == 1) {
|
|
avio_get_str16le(pb, length, buf, buf_size);
|
|
if (!strlen(buf)) {
|
|
av_free(buf);
|
|
return;
|
|
}
|
|
} else if (type == 3 && length == 4) {
|
|
strcpy(buf, avio_rl32(pb) ? "true" : "false");
|
|
} else if (type == 4 && length == 8) {
|
|
int64_t num = avio_rl64(pb);
|
|
if (!strcmp(key, "WM/EncodingTime") ||
|
|
!strcmp(key, "WM/MediaOriginalBroadcastDateTime")) {
|
|
if (filetime_to_iso8601(buf, buf_size, num) < 0) {
|
|
av_free(buf);
|
|
return;
|
|
}
|
|
} else if (!strcmp(key, "WM/WMRVEncodeTime") ||
|
|
!strcmp(key, "WM/WMRVEndTime")) {
|
|
if (crazytime_to_iso8601(buf, buf_size, num) < 0) {
|
|
av_free(buf);
|
|
return;
|
|
}
|
|
} else if (!strcmp(key, "WM/WMRVExpirationDate")) {
|
|
if (oledate_to_iso8601(buf, buf_size, num) < 0 ) {
|
|
av_free(buf);
|
|
return;
|
|
}
|
|
} else if (!strcmp(key, "WM/WMRVBitrate"))
|
|
snprintf(buf, buf_size, "%f", av_int2double(num));
|
|
else
|
|
snprintf(buf, buf_size, "%"PRIi64, num);
|
|
} else if (type == 5 && length == 2) {
|
|
snprintf(buf, buf_size, "%"PRIi16, avio_rl16(pb));
|
|
} else if (type == 6 && length == 16) {
|
|
ff_asf_guid guid;
|
|
avio_read(pb, guid, 16);
|
|
snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid));
|
|
} else if (type == 2 && !strcmp(key, "WM/Picture")) {
|
|
get_attachment(s, pb, length);
|
|
av_freep(&buf);
|
|
return;
|
|
} else {
|
|
av_freep(&buf);
|
|
av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
|
|
avio_skip(pb, length);
|
|
return;
|
|
}
|
|
|
|
av_dict_set(&s->metadata, key, buf, 0);
|
|
av_freep(&buf);
|
|
}
|
|
|
|
/**
|
|
* Parse metadata entries
|
|
*/
|
|
static void parse_legacy_attrib(AVFormatContext *s, AVIOContext *pb)
|
|
{
|
|
ff_asf_guid guid;
|
|
int length, type;
|
|
while(!url_feof(pb)) {
|
|
char key[1024];
|
|
ff_get_guid(pb, &guid);
|
|
type = avio_rl32(pb);
|
|
length = avio_rl32(pb);
|
|
if (!length)
|
|
break;
|
|
if (ff_guidcmp(&guid, ff_metadata_guid)) {
|
|
av_log(s, AV_LOG_WARNING, "unknown guid "FF_PRI_GUID", expected metadata_guid; "
|
|
"remaining metadata entries ignored\n", FF_ARG_GUID(guid));
|
|
break;
|
|
}
|
|
avio_get_str16le(pb, INT_MAX, key, sizeof(key));
|
|
get_tag(s, pb, key, type, length);
|
|
}
|
|
|
|
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
|
|
}
|
|
|
|
/**
|
|
* parse VIDEOINFOHEADER2 structure
|
|
* @return bytes consumed
|
|
*/
|
|
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st)
|
|
{
|
|
WtvContext *wtv = s->priv_data;
|
|
AVIOContext *pb = wtv->pb;
|
|
|
|
avio_skip(pb, 72); // picture aspect ratio is unreliable
|
|
ff_get_bmp_header(pb, st, NULL);
|
|
|
|
return 72 + 40;
|
|
}
|
|
|
|
/**
|
|
* Parse MPEG1WAVEFORMATEX extradata structure
|
|
*/
|
|
static void parse_mpeg1waveformatex(AVStream *st)
|
|
{
|
|
/* fwHeadLayer */
|
|
switch (AV_RL16(st->codec->extradata)) {
|
|
case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break;
|
|
case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break;
|
|
case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break;
|
|
}
|
|
|
|
st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */
|
|
|
|
/* dwHeadMode */
|
|
switch (AV_RL16(st->codec->extradata + 6)) {
|
|
case 1 : case 2 : case 4 : st->codec->channels = 2; break;
|
|
case 8 : st->codec->channels = 1; break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initialise stream
|
|
* @param st Stream to initialise, or NULL to create and initialise new stream
|
|
* @return NULL on error
|
|
*/
|
|
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
|
|
{
|
|
if (st) {
|
|
if (st->codec->extradata) {
|
|
av_freep(&st->codec->extradata);
|
|
st->codec->extradata_size = 0;
|
|
}
|
|
} else {
|
|
WtvStream *wst = av_mallocz(sizeof(WtvStream));
|
|
if (!wst)
|
|
return NULL;
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return NULL;
|
|
st->id = sid;
|
|
st->priv_data = wst;
|
|
}
|
|
st->codec->codec_type = codec_type;
|
|
st->need_parsing = AVSTREAM_PARSE_FULL;
|
|
avpriv_set_pts_info(st, 64, 1, 10000000);
|
|
return st;
|
|
}
|
|
|
|
/**
|
|
* parse Media Type structure and populate stream
|
|
* @param st Stream, or NULL to create new stream
|
|
* @param mediatype Mediatype GUID
|
|
* @param subtype Subtype GUID
|
|
* @param formattype Format GUID
|
|
* @param size Size of format buffer
|
|
* @return NULL on error
|
|
*/
|
|
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
|
|
ff_asf_guid mediatype, ff_asf_guid subtype,
|
|
ff_asf_guid formattype, int size)
|
|
{
|
|
WtvContext *wtv = s->priv_data;
|
|
AVIOContext *pb = wtv->pb;
|
|
if (!ff_guidcmp(subtype, ff_mediasubtype_cpfilters_processed) &&
|
|
!ff_guidcmp(formattype, ff_format_cpfilters_processed)) {
|
|
ff_asf_guid actual_subtype;
|
|
ff_asf_guid actual_formattype;
|
|
|
|
if (size < 32) {
|
|
av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
|
|
avio_skip(pb, size);
|
|
return NULL;
|
|
}
|
|
|
|
avio_skip(pb, size - 32);
|
|
ff_get_guid(pb, &actual_subtype);
|
|
ff_get_guid(pb, &actual_formattype);
|
|
avio_seek(pb, -size, SEEK_CUR);
|
|
|
|
st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
|
|
avio_skip(pb, 32);
|
|
return st;
|
|
} else if (!ff_guidcmp(mediatype, ff_mediatype_audio)) {
|
|
st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
|
|
if (!st)
|
|
return NULL;
|
|
if (!ff_guidcmp(formattype, ff_format_waveformatex)) {
|
|
int ret = ff_get_wav_header(pb, st->codec, size);
|
|
if (ret < 0)
|
|
return NULL;
|
|
} else {
|
|
if (ff_guidcmp(formattype, ff_format_none))
|
|
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
|
|
avio_skip(pb, size);
|
|
}
|
|
|
|
if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
|
|
st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample);
|
|
} else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) {
|
|
if (st->codec->extradata && st->codec->extradata_size >= 22)
|
|
parse_mpeg1waveformatex(st);
|
|
else
|
|
av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
|
|
} else {
|
|
st->codec->codec_id = ff_codec_guid_get_id(ff_codec_wav_guids, subtype);
|
|
if (st->codec->codec_id == CODEC_ID_NONE)
|
|
av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
|
|
}
|
|
return st;
|
|
} else if (!ff_guidcmp(mediatype, ff_mediatype_video)) {
|
|
st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
|
|
if (!st)
|
|
return NULL;
|
|
if (!ff_guidcmp(formattype, format_videoinfo2)) {
|
|
int consumed = parse_videoinfoheader2(s, st);
|
|
avio_skip(pb, FFMAX(size - consumed, 0));
|
|
} else if (!ff_guidcmp(formattype, ff_format_mpeg2_video)) {
|
|
int consumed = parse_videoinfoheader2(s, st);
|
|
avio_skip(pb, FFMAX(size - consumed, 0));
|
|
} else {
|
|
if (ff_guidcmp(formattype, ff_format_none))
|
|
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
|
|
avio_skip(pb, size);
|
|
}
|
|
|
|
if (!memcmp(subtype + 4, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12)) {
|
|
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype));
|
|
} else {
|
|
st->codec->codec_id = ff_codec_guid_get_id(ff_video_guids, subtype);
|
|
}
|
|
if (st->codec->codec_id == CODEC_ID_NONE)
|
|
av_log(s, AV_LOG_WARNING, "unknown subtype:"FF_PRI_GUID"\n", FF_ARG_GUID(subtype));
|
|
return st;
|
|
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
|
|
!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
|
|
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
|
|
if (!st)
|
|
return NULL;
|
|
if (ff_guidcmp(formattype, ff_format_none))
|
|
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
|
|
avio_skip(pb, size);
|
|
st->codec->codec_id = CODEC_ID_DVB_SUBTITLE;
|
|
return st;
|
|
} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
|
|
(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
|
|
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
|
|
if (!st)
|
|
return NULL;
|
|
if (ff_guidcmp(formattype, ff_format_none))
|
|
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
|
|
avio_skip(pb, size);
|
|
st->codec->codec_id = CODEC_ID_DVB_TELETEXT;
|
|
return st;
|
|
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) &&
|
|
!ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) {
|
|
if (ff_guidcmp(formattype, ff_format_none))
|
|
av_log(s, AV_LOG_WARNING, "unknown formattype:"FF_PRI_GUID"\n", FF_ARG_GUID(formattype));
|
|
avio_skip(pb, size);
|
|
return NULL;
|
|
}
|
|
|
|
av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"FF_PRI_GUID
|
|
", subtype:"FF_PRI_GUID", formattype:"FF_PRI_GUID"\n",
|
|
FF_ARG_GUID(mediatype), FF_ARG_GUID(subtype), FF_ARG_GUID(formattype));
|
|
avio_skip(pb, size);
|
|
return NULL;
|
|
}
|
|
|
|
enum {
|
|
SEEK_TO_DATA = 0,
|
|
SEEK_TO_PTS,
|
|
};
|
|
|
|
/**
|
|
* Parse WTV chunks
|
|
* @param mode SEEK_TO_DATA or SEEK_TO_PTS
|
|
* @param seekts timestamp
|
|
* @param[out] len_ptr Length of data chunk
|
|
* @return stream index of data chunk, or <0 on error
|
|
*/
|
|
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr)
|
|
{
|
|
WtvContext *wtv = s->priv_data;
|
|
AVIOContext *pb = wtv->pb;
|
|
while (!url_feof(pb)) {
|
|
ff_asf_guid g;
|
|
int len, sid, consumed;
|
|
|
|
ff_get_guid(pb, &g);
|
|
len = avio_rl32(pb);
|
|
if (len < 32)
|
|
break;
|
|
sid = avio_rl32(pb) & 0x7FFF;
|
|
avio_skip(pb, 8);
|
|
consumed = 32;
|
|
|
|
if (!ff_guidcmp(g, ff_stream_guid)) {
|
|
if (ff_find_stream_index(s, sid) < 0) {
|
|
ff_asf_guid mediatype, subtype, formattype;
|
|
int size;
|
|
avio_skip(pb, 28);
|
|
ff_get_guid(pb, &mediatype);
|
|
ff_get_guid(pb, &subtype);
|
|
avio_skip(pb, 12);
|
|
ff_get_guid(pb, &formattype);
|
|
size = avio_rl32(pb);
|
|
parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
|
|
consumed += 92 + size;
|
|
}
|
|
} else if (!ff_guidcmp(g, ff_stream2_guid)) {
|
|
int stream_index = ff_find_stream_index(s, sid);
|
|
if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) {
|
|
ff_asf_guid mediatype, subtype, formattype;
|
|
int size;
|
|
avio_skip(pb, 12);
|
|
ff_get_guid(pb, &mediatype);
|
|
ff_get_guid(pb, &subtype);
|
|
avio_skip(pb, 12);
|
|
ff_get_guid(pb, &formattype);
|
|
size = avio_rl32(pb);
|
|
parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
|
|
consumed += 76 + size;
|
|
}
|
|
} else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
|
|
!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
|
|
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
|
|
!ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) ||
|
|
!ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) ||
|
|
!ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) {
|
|
int stream_index = ff_find_stream_index(s, sid);
|
|
if (stream_index >= 0) {
|
|
AVStream *st = s->streams[stream_index];
|
|
uint8_t buf[258];
|
|
const uint8_t *pbuf = buf;
|
|
int buf_size;
|
|
|
|
avio_skip(pb, 8);
|
|
consumed += 8;
|
|
if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
|
|
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) {
|
|
avio_skip(pb, 6);
|
|
consumed += 6;
|
|
}
|
|
|
|
buf_size = FFMIN(len - consumed, sizeof(buf));
|
|
avio_read(pb, buf, buf_size);
|
|
consumed += buf_size;
|
|
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, NULL, 0, 0, NULL);
|
|
}
|
|
} else if (!ff_guidcmp(g, EVENTID_AudioTypeSpanningEvent)) {
|
|
int stream_index = ff_find_stream_index(s, sid);
|
|
if (stream_index >= 0) {
|
|
AVStream *st = s->streams[stream_index];
|
|
int audio_type;
|
|
avio_skip(pb, 8);
|
|
audio_type = avio_r8(pb);
|
|
if (audio_type == 2)
|
|
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
|
|
else if (audio_type == 3)
|
|
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
|
|
consumed += 9;
|
|
}
|
|
} else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
|
|
int stream_index = ff_find_stream_index(s, sid);
|
|
if (stream_index >= 0) {
|
|
avio_skip(pb, 12);
|
|
if (avio_rl32(pb))
|
|
av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
|
|
consumed += 16;
|
|
}
|
|
} else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
|
|
int stream_index = ff_find_stream_index(s, sid);
|
|
if (stream_index >= 0) {
|
|
AVStream *st = s->streams[stream_index];
|
|
uint8_t language[4];
|
|
avio_skip(pb, 12);
|
|
avio_read(pb, language, 3);
|
|
if (language[0]) {
|
|
language[3] = 0;
|
|
av_dict_set(&st->metadata, "language", language, 0);
|
|
if (!strcmp(language, "nar") || !strcmp(language, "NAR"))
|
|
st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
|
|
}
|
|
consumed += 15;
|
|
}
|
|
} else if (!ff_guidcmp(g, ff_timestamp_guid)) {
|
|
int stream_index = ff_find_stream_index(s, sid);
|
|
if (stream_index >= 0) {
|
|
avio_skip(pb, 8);
|
|
wtv->pts = avio_rl64(pb);
|
|
consumed += 16;
|
|
if (wtv->pts == -1)
|
|
wtv->pts = AV_NOPTS_VALUE;
|
|
else {
|
|
wtv->last_valid_pts = wtv->pts;
|
|
if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
|
|
wtv->epoch = wtv->pts;
|
|
if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
|
|
avio_skip(pb, WTV_PAD8(len) - consumed);
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
} else if (!ff_guidcmp(g, ff_data_guid)) {
|
|
int stream_index = ff_find_stream_index(s, sid);
|
|
if (mode == SEEK_TO_DATA && stream_index >= 0 && len > 32 && s->streams[stream_index]->priv_data) {
|
|
WtvStream *wst = s->streams[stream_index]->priv_data;
|
|
wst->seen_data = 1;
|
|
if (len_ptr) {
|
|
*len_ptr = len;
|
|
}
|
|
return stream_index;
|
|
}
|
|
} else if (
|
|
!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}) ||
|
|
!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}) ||
|
|
!ff_guidcmp(g, /* DSATTRIB_TRANSPORT_PROPERTIES */ ff_DSATTRIB_TRANSPORT_PROPERTIES) ||
|
|
!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}) ||
|
|
!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}) ||
|
|
!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}) ||
|
|
!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}) ||
|
|
!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}) ||
|
|
!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}) ||
|
|
!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}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
|
|
!ff_guidcmp(g, (const ff_asf_guid){0xF7,0x10,0x02,0xB9,0xEE,0x7C,0xED,0x4E,0xBD,0x7F,0x05,0x40,0x35,0x86,0x18,0xA1})) {
|
|
//ignore known guids
|
|
} else
|
|
av_log(s, AV_LOG_WARNING, "unsupported chunk:"FF_PRI_GUID"\n", FF_ARG_GUID(g));
|
|
|
|
avio_skip(pb, WTV_PAD8(len) - consumed);
|
|
}
|
|
return AVERROR_EOF;
|
|
}
|
|
|
|
static int read_header(AVFormatContext *s)
|
|
{
|
|
WtvContext *wtv = s->priv_data;
|
|
int root_sector, root_size;
|
|
uint8_t root[WTV_SECTOR_SIZE];
|
|
AVIOContext *pb;
|
|
int64_t timeline_pos;
|
|
int ret;
|
|
|
|
wtv->epoch =
|
|
wtv->pts =
|
|
wtv->last_valid_pts = AV_NOPTS_VALUE;
|
|
|
|
/* read root directory sector */
|
|
avio_skip(s->pb, 0x30);
|
|
root_size = avio_rl32(s->pb);
|
|
if (root_size > sizeof(root)) {
|
|
av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avio_skip(s->pb, 4);
|
|
root_sector = avio_rl32(s->pb);
|
|
|
|
avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
|
|
root_size = avio_read(s->pb, root, root_size);
|
|
if (root_size < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
/* parse chunks up until first data chunk */
|
|
wtv->pb = wtvfile_open(s, root, root_size, ff_timeline_le16);
|
|
if (!wtv->pb) {
|
|
av_log(s, AV_LOG_ERROR, "timeline data missing\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
avio_seek(wtv->pb, -32, SEEK_CUR);
|
|
|
|
timeline_pos = avio_tell(s->pb); // save before opening another file
|
|
|
|
/* read metadata */
|
|
pb = wtvfile_open(s, root, root_size, ff_table_0_entries_legacy_attrib_le16);
|
|
if (pb) {
|
|
parse_legacy_attrib(s, pb);
|
|
wtvfile_close(pb);
|
|
}
|
|
|
|
/* read seek index */
|
|
if (s->nb_streams) {
|
|
AVStream *st = s->streams[0];
|
|
pb = wtvfile_open(s, root, root_size, ff_table_0_entries_time_le16);
|
|
if (pb) {
|
|
while(1) {
|
|
uint64_t timestamp = avio_rl64(pb);
|
|
uint64_t frame_nb = avio_rl64(pb);
|
|
if (url_feof(pb))
|
|
break;
|
|
ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size,
|
|
0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME);
|
|
}
|
|
wtvfile_close(pb);
|
|
|
|
if (wtv->nb_index_entries) {
|
|
pb = wtvfile_open(s, root, root_size, ff_timeline_table_0_entries_Events_le16);
|
|
if (pb) {
|
|
int i;
|
|
while (1) {
|
|
uint64_t frame_nb = avio_rl64(pb);
|
|
uint64_t position = avio_rl64(pb);
|
|
if (url_feof(pb))
|
|
break;
|
|
for (i = wtv->nb_index_entries - 1; i >= 0; i--) {
|
|
AVIndexEntry *e = wtv->index_entries + i;
|
|
if (frame_nb > e->size)
|
|
break;
|
|
if (position > e->pos)
|
|
e->pos = position;
|
|
}
|
|
}
|
|
wtvfile_close(pb);
|
|
st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
avio_seek(s->pb, timeline_pos, SEEK_SET);
|
|
return 0;
|
|
}
|
|
|
|
static int read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
WtvContext *wtv = s->priv_data;
|
|
AVIOContext *pb = wtv->pb;
|
|
int stream_index, len, ret;
|
|
|
|
stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
|
|
if (stream_index < 0)
|
|
return stream_index;
|
|
|
|
ret = av_get_packet(pb, pkt, len - 32);
|
|
if (ret < 0)
|
|
return ret;
|
|
pkt->stream_index = stream_index;
|
|
pkt->pts = wtv->pts;
|
|
avio_skip(pb, WTV_PAD8(len) - len);
|
|
return 0;
|
|
}
|
|
|
|
static int read_seek(AVFormatContext *s, int stream_index,
|
|
int64_t ts, int flags)
|
|
{
|
|
WtvContext *wtv = s->priv_data;
|
|
AVIOContext *pb = wtv->pb;
|
|
AVStream *st = s->streams[0];
|
|
int64_t ts_relative;
|
|
int i;
|
|
|
|
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
|
|
return AVERROR(ENOSYS);
|
|
|
|
/* timestamp adjustment is required because wtv->pts values are absolute,
|
|
* whereas AVIndexEntry->timestamp values are relative to epoch. */
|
|
ts_relative = ts;
|
|
if (wtv->epoch != AV_NOPTS_VALUE)
|
|
ts_relative -= wtv->epoch;
|
|
|
|
i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
|
|
if (i < 0) {
|
|
if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts) {
|
|
if (avio_seek(pb, 0, SEEK_SET) < 0)
|
|
return -1;
|
|
} else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) {
|
|
if (avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET) < 0)
|
|
return -1;
|
|
}
|
|
if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
|
|
return AVERROR(ERANGE);
|
|
return 0;
|
|
}
|
|
if (avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET) < 0)
|
|
return -1;
|
|
wtv->pts = wtv->index_entries[i].timestamp;
|
|
if (wtv->epoch != AV_NOPTS_VALUE)
|
|
wtv->pts += wtv->epoch;
|
|
wtv->last_valid_pts = wtv->pts;
|
|
return 0;
|
|
}
|
|
|
|
static int read_close(AVFormatContext *s)
|
|
{
|
|
WtvContext *wtv = s->priv_data;
|
|
av_freep(&wtv->index_entries);
|
|
wtvfile_close(wtv->pb);
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_wtv_demuxer = {
|
|
.name = "wtv",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
|
|
.priv_data_size = sizeof(WtvContext),
|
|
.read_probe = read_probe,
|
|
.read_header = read_header,
|
|
.read_packet = read_packet,
|
|
.read_seek = read_seek,
|
|
.read_close = read_close,
|
|
.flags = AVFMT_SHOW_IDS,
|
|
};
|