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1052 lines
39 KiB
1052 lines
39 KiB
/* |
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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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/** |
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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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|
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/intfloat_readwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "wtv.h" |
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#include "mpegts.h" |
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#include <strings.h> |
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|
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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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* |
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* File system routines |
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* |
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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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|
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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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|
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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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/** |
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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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|
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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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|
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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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|
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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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/** |
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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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|
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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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|
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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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/** |
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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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/** |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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while(buf + 48 <= buf_end) { |
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int dir_length, name_size, first_sector, depth; |
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uint64_t file_length; |
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const uint8_t *name; |
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if (ff_guidcmp(buf, ff_dir_entry_guid)) { |
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av_log(s, AV_LOG_ERROR, "unknown guid "FF_PRI_GUID", expected dir_entry_guid; " |
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"remaining directory entries ignored\n", FF_ARG_GUID(buf)); |
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break; |
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} |
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dir_length = AV_RL16(buf + 16); |
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file_length = AV_RL64(buf + 24); |
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name_size = 2 * AV_RL32(buf + 32); |
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if (buf + 48 + name_size > buf_end) { |
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av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n"); |
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break; |
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} |
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first_sector = AV_RL32(buf + 40 + name_size); |
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depth = AV_RL32(buf + 44 + name_size); |
|
|
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/* compare file name; test optional null terminator */ |
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name = buf + 40; |
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if (name_size >= filename_size && |
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!memcmp(name, filename, filename_size) && |
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(name_size < filename_size + 2 || !AV_RN16(name + filename_size))) |
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return wtvfile_open_sector(first_sector, file_length, depth, s); |
|
|
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buf += dir_length; |
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} |
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return 0; |
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} |
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|
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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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/** |
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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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* |
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* Main demuxer |
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* |
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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 */ |
|
int64_t epoch; |
|
int64_t pts; /** pts for next data chunk */ |
|
int64_t last_valid_pts; /** latest valid pts, used for interative seeking */ |
|
|
|
/* maintain private seek index, as the AVIndexEntry->pos is relative to the |
|
start of the 'timeline' file, not the file system (AVFormatContext->pb) */ |
|
AVIndexEntry *index_entries; |
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int nb_index_entries; |
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unsigned int index_entries_allocated_size; |
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} WtvContext; |
|
|
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/* WTV GUIDs */ |
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static const ff_asf_guid metadata_guid = |
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{0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53}; |
|
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}; |
|
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}; |
|
static const ff_asf_guid EVENTID_LanguageSpanningEvent = |
|
{0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; |
|
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}; |
|
static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = |
|
{0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; |
|
static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = |
|
{0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; |
|
static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = |
|
{0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; |
|
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}; |
|
static const ff_asf_guid EVENTID_TeletextSpanningEvent = |
|
{0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; |
|
static const ff_asf_guid EVENTID_AudioTypeSpanningEvent = |
|
{0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}; |
|
|
|
/* Windows media GUIDs */ |
|
|
|
/* Media types */ |
|
static const ff_asf_guid mediasubtype_mpeg1payload = |
|
{0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}; |
|
static const ff_asf_guid mediatype_mpeg2_sections = |
|
{0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}; |
|
static const ff_asf_guid mediatype_mpeg2_pes = |
|
{0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
|
static const ff_asf_guid mediatype_mstvcaption = |
|
{0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}; |
|
|
|
/* Media subtypes */ |
|
static const ff_asf_guid mediasubtype_cpfilters_processed = |
|
{0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D}; |
|
static const ff_asf_guid mediasubtype_dvb_subtitle = |
|
{0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}; |
|
static const ff_asf_guid mediasubtype_teletext = |
|
{0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
|
static const ff_asf_guid mediasubtype_dtvccdata = |
|
{0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}; |
|
static const ff_asf_guid mediasubtype_mpeg2_sections = |
|
{0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}; |
|
|
|
/* Formats */ |
|
static const ff_asf_guid format_cpfilters_processed = |
|
{0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A}; |
|
static const ff_asf_guid format_waveformatex = |
|
{0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A}; |
|
static const ff_asf_guid format_videoinfo2 = |
|
{0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
|
static const ff_asf_guid format_mpeg2_video = |
|
{0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
|
|
|
static int read_probe(AVProbeData *p) |
|
{ |
|
return ff_guidcmp(p->buf, ff_wtv_guid) ? 0 : AVPROBE_SCORE_MAX; |
|
} |
|
|
|
/** |
|
* Convert win32 FILETIME to ISO-8601 string |
|
*/ |
|
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value) |
|
{ |
|
time_t t = (value / 10000000LL) - 11644473600LL; |
|
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t)); |
|
} |
|
|
|
/** |
|
* Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string |
|
*/ |
|
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value) |
|
{ |
|
time_t t = (value / 10000000LL) - 719162LL*86400LL; |
|
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t)); |
|
} |
|
|
|
/** |
|
* Convert OLE DATE to ISO-8601 string |
|
*/ |
|
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value) |
|
{ |
|
time_t t = 631112400LL + 86400*av_int2dbl(value); |
|
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t)); |
|
} |
|
|
|
static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length) |
|
{ |
|
char mime[1024]; |
|
char description[1024]; |
|
unsigned int filesize; |
|
AVStream *st; |
|
int64_t pos = avio_tell(pb); |
|
|
|
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 = av_new_stream(s, 0); |
|
if (!st) |
|
goto done; |
|
av_metadata_set2(&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")) |
|
filetime_to_iso8601(buf, buf_size, num); |
|
else if (!strcmp(key, "WM/WMRVEncodeTime") || |
|
!strcmp(key, "WM/WMRVEndTime")) |
|
crazytime_to_iso8601(buf, buf_size, num); |
|
else if (!strcmp(key, "WM/WMRVExpirationDate")) |
|
oledate_to_iso8601(buf, buf_size, num); |
|
else if (!strcmp(key, "WM/WMRVBitrate")) |
|
snprintf(buf, buf_size, "%f", av_int2dbl(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_metadata_set2(&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, 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); |
|
|
|
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 = av_new_stream(s, sid); |
|
if (!st) |
|
return NULL; |
|
st->priv_data = wst; |
|
} |
|
st->codec->codec_type = codec_type; |
|
st->need_parsing = AVSTREAM_PARSE_FULL; |
|
av_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, mediasubtype_cpfilters_processed) && |
|
!ff_guidcmp(formattype, 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, 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, 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 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, 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, 0, 0, 0, 0); |
|
} |
|
} 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_metadata_set2(&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) { |
|
#define WTV_PAD8(x) (((x) + 7) & ~7) |
|
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) { |
|
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 */ (const ff_asf_guid){0x12,0xF6,0x22,0xB6,0xAD,0x47,0x71,0x46,0xAD,0x6C,0x05,0xA9,0x8E,0x65,0xDE,0x3A}) || |
|
!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})) { |
|
//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; |
|
} |
|
|
|
/* declare utf16le strings */ |
|
#define _ , 0, |
|
static const uint8_t timeline_le16[] = |
|
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0}; |
|
static const uint8_t table_0_entries_legacy_attrib_le16[] = |
|
{'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}; |
|
static const uint8_t table_0_entries_time_le16[] = |
|
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0}; |
|
static const uint8_t timeline_table_0_entries_Events_le16[] = |
|
{'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}; |
|
#undef _ |
|
|
|
static int read_header(AVFormatContext *s, AVFormatParameters *ap) |
|
{ |
|
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, 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, 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, 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, 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) |
|
avio_seek(pb, 0, SEEK_SET); |
|
else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) |
|
avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET); |
|
if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) |
|
return AVERROR(ERANGE); |
|
return 0; |
|
} |
|
wtv->pts = wtv->index_entries[i].timestamp; |
|
if (wtv->epoch != AV_NOPTS_VALUE) |
|
wtv->pts += wtv->epoch; |
|
wtv->last_valid_pts = wtv->pts; |
|
avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET); |
|
return 0; |
|
} |
|
|
|
static int read_close(AVFormatContext *s) |
|
{ |
|
WtvContext *wtv = s->priv_data; |
|
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, |
|
};
|
|
|