ffmpeg / libavformat / wtv.c @ e6fb5a4f
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/*
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* Windows Television (WTV) demuxer
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* Copyright (c) 2010-2011 Peter Ross <pross@xvid.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Windows Television (WTV) demuxer
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* @author Peter Ross <pross@xvid.org>
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*/
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#include "libavutil/intreadwrite.h" |
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#include "libavutil/intfloat_readwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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#include "riff.h" |
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#include "asf.h" |
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#include "mpegts.h" |
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/* Macros for formating GUIDs */
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#define PRI_GUID \
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"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
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#define ARG_GUID(g) \
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g[0],g[1],g[2],g[3],g[4],g[5],g[6],g[7],g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] |
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#define PRI_PRETTY_GUID \
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"%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x"
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#define ARG_PRETTY_GUID(g) \
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AV_RL32(g),AV_RL16(g+4),AV_RL16(g+6),g[8],g[9],g[10],g[11],g[12],g[13],g[14],g[15] |
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#define LEN_PRETTY_GUID 34 |
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/*
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*
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* File system routines
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*
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*/
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#define WTV_SECTOR_BITS 12 |
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#define WTV_SECTOR_SIZE (1 << WTV_SECTOR_BITS) |
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#define WTV_BIGSECTOR_BITS 18 |
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typedef struct { |
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ByteIOContext *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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ByteIOContext *pb = wf->pb_filesystem; |
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int nread = 0; |
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if (wf->error || url_ferror(pb))
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return -1; |
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if (wf->position >= wf->length || 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 = get_buffer(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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url_fseek(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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ByteIOContext *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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url_fseek(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(ByteIOContext *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] = get_le32(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 ByteIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int depth, AVFormatContext *s) |
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{ |
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ByteIOContext *pb; |
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WtvFile *wf; |
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uint8_t *buffer; |
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if (url_fseek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0) |
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return NULL; |
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wf = av_mallocz(sizeof(WtvFile));
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if (!wf)
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return NULL; |
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if (depth == 0) { |
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wf->sectors = av_malloc(sizeof(uint32_t));
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if (!wf->sectors) {
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av_free(wf); |
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return NULL; |
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} |
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wf->sectors[0] = first_sector;
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wf->nb_sectors = 1;
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wf->sector_bits = WTV_SECTOR_BITS; |
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} else if (depth == 1) { |
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wf->sectors = av_malloc(WTV_SECTOR_SIZE); |
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if (!wf->sectors) {
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av_free(wf); |
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return NULL; |
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} |
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wf->nb_sectors = read_ints(s->pb, wf->sectors, WTV_SECTOR_SIZE / 4);
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wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; |
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} else if (depth == 2) { |
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uint32_t sectors1[WTV_SECTOR_SIZE / 4];
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int nb_sectors1 = read_ints(s->pb, sectors1, WTV_SECTOR_SIZE / 4); |
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int i;
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wf->sectors = av_malloc(nb_sectors1 << WTV_SECTOR_BITS); |
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if (!wf->sectors) {
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av_free(wf); |
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return NULL; |
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} |
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wf->nb_sectors = 0;
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for (i = 0; i < nb_sectors1; i++) { |
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if (url_fseek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0) |
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break;
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wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4); |
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} |
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wf->sector_bits = length & (1ULL<<63) ? WTV_SECTOR_BITS : WTV_BIGSECTOR_BITS; |
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} else {
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av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (0x%x)\n", depth);
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av_free(wf); |
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return NULL; |
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} |
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if (!wf->nb_sectors) {
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av_free(wf->sectors); |
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av_free(wf); |
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return NULL; |
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} |
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/* check length */
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length &= 0xFFFFFFFFFFFF;
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if (length > ((int64_t)wf->nb_sectors << wf->sector_bits)) {
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av_log(s, AV_LOG_WARNING, "reported file length (0x%"PRIx64") exceeds number of available sectors (0x%"PRIx64")\n", length, (int64_t)wf->nb_sectors << wf->sector_bits); |
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length = (int64_t)wf->nb_sectors << wf->sector_bits; |
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} |
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wf->length = length; |
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/* seek to intial sector */
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wf->position = 0;
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if (url_fseek(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 = av_alloc_put_byte(buffer, 1 << wf->sector_bits, 0, wf, |
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wtvfile_read_packet, NULL, wtvfile_seek);
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if (!pb) {
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av_free(buffer); |
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av_free(wf->sectors); |
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av_free(wf); |
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} |
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return pb;
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} |
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static const ff_asf_guid dir_entry_guid = |
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{0x92,0xB7,0x74,0x91,0x59,0x70,0x70,0x44,0x88,0xDF,0x06,0x3B,0x82,0xCC,0x21,0x3D}; |
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/**
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* Open file using filename
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* @param[in] buf directory buffer
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* @param buf_size directory buffer size
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* @param[in] filename
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* @param filename_size size of filename
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* @return NULL on error
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*/
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static ByteIOContext * wtvfile_open2(AVFormatContext *s, const uint8_t *buf, int buf_size, const uint8_t *filename, int filename_size) |
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{ |
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const uint8_t *buf_end = buf + buf_size;
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while(buf + 48 <= buf_end) { |
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int dir_length, name_size, first_sector, depth;
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uint64_t file_length; |
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const uint8_t *name;
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if (ff_guidcmp(buf, dir_entry_guid)) {
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av_log(s, AV_LOG_ERROR, "unknown guid "PRI_GUID", expected dir_entry_guid; " |
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"remaining directory entries ignored\n", ARG_GUID(buf));
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break;
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} |
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dir_length = AV_RL16(buf + 16);
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file_length = AV_RL64(buf + 24);
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name_size = 2 * AV_RL32(buf + 32); |
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if (buf + 48 + name_size > buf_end) { |
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av_log(s, AV_LOG_ERROR, "filename exceeds buffer size; remaining directory entries ignored\n");
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break;
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} |
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first_sector = AV_RL32(buf + 40 + name_size);
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depth = AV_RL32(buf + 44 + name_size);
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/* compare file name; test optional null terminator */
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name = buf + 40;
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if (name_size >= filename_size &&
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!memcmp(name, filename, filename_size) && |
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(name_size < filename_size + 2 || !AV_RN16(name + filename_size)))
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return wtvfile_open_sector(first_sector, file_length, depth, s);
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buf += dir_length; |
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} |
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return 0; |
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} |
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#define wtvfile_open(s, buf, buf_size, filename) \
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wtvfile_open2(s, buf, buf_size, filename, sizeof(filename))
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/**
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* Close file opened with wtvfile_open_sector(), or wtv_open()
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*/
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static void wtvfile_close(ByteIOContext *pb) |
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{ |
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WtvFile *wf = pb->opaque; |
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av_free(wf->sectors); |
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av_free(pb); |
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} |
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/*
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*
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* Main demuxer
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*
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*/
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typedef struct { |
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int seen_data;
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} WtvStream; |
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typedef struct { |
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ByteIOContext *pb; /** timeline file */
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int64_t epoch; |
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int64_t pts; /** pts for next data chunk */
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int64_t last_valid_pts; /** latest valid pts, used for interative seeking */
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/* maintain private seek index, as the AVIndexEntry->pos is relative to the
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start of the 'timeline' file, not the file system (AVFormatContext->pb) */
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AVIndexEntry *index_entries; |
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int nb_index_entries;
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unsigned int index_entries_allocated_size; |
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} WtvContext; |
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typedef struct { |
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enum CodecID id;
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ff_asf_guid guid; |
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} AVCodecGuid; |
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static enum CodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid) |
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{ |
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int i;
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for (i = 0; guids[i].id != CODEC_ID_NONE; i++) { |
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if (!ff_guidcmp(guids[i].guid, guid))
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return guids[i].id;
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} |
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return CODEC_ID_NONE;
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} |
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/* WTV GUIDs */
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static const ff_asf_guid wtv_guid = |
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{0xB7,0xD8,0x00,0x20,0x37,0x49,0xDA,0x11,0xA6,0x4E,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; |
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static const ff_asf_guid metadata_guid = |
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{0x5A,0xFE,0xD7,0x6D,0xC8,0x1D,0x8F,0x4A,0x99,0x22,0xFA,0xB1,0x1C,0x38,0x14,0x53}; |
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static const ff_asf_guid timestamp_guid = |
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{0x5B,0x05,0xE6,0x1B,0x97,0xA9,0x49,0x43,0x88,0x17,0x1A,0x65,0x5A,0x29,0x8A,0x97}; |
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static const ff_asf_guid data_guid = |
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{0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; |
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static const ff_asf_guid stream_guid = |
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{0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE}; |
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static const ff_asf_guid stream2_guid = |
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{0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}; |
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static const ff_asf_guid EVENTID_SubtitleSpanningEvent = |
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{0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A}; |
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static const ff_asf_guid EVENTID_LanguageSpanningEvent = |
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{0x6D,0x66,0x92,0xE2,0x02,0x9C,0x8D,0x44,0xAA,0x8D,0x78,0x1A,0x93,0xFD,0xC3,0x95}; |
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static const ff_asf_guid EVENTID_AudioDescriptorSpanningEvent = |
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{0x1C,0xD4,0x7B,0x10,0xDA,0xA6,0x91,0x46,0x83,0x69,0x11,0xB2,0xCD,0xAA,0x28,0x8E}; |
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static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent = |
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{0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24}; |
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static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent = |
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{0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66}; |
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static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent = |
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{0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}; |
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static const ff_asf_guid EVENTID_StreamIDSpanningEvent = |
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{0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE}; |
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static const ff_asf_guid EVENTID_TeletextSpanningEvent = |
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{0x50,0xD9,0x99,0x95,0x33,0x5F,0x17,0x46,0xAF,0x7C,0x1E,0x54,0xB5,0x10,0xDA,0xA3}; |
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|
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/* Windows media GUIDs */
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#define MEDIASUBTYPE_BASE_GUID \
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0x00,0x00,0x10,0x00,0x80,0x00,0x00,0xAA,0x00,0x38,0x9B,0x71 |
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|
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/* Media types */
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static const ff_asf_guid mediatype_audio = |
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{'a','u','d','s',MEDIASUBTYPE_BASE_GUID}; |
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static const ff_asf_guid mediatype_video = |
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{'v','i','d','s',MEDIASUBTYPE_BASE_GUID}; |
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static const ff_asf_guid mediasubtype_mpeg1payload = |
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{0x81,0xEB,0x36,0xE4,0x4F,0x52,0xCE,0x11,0x9F,0x53,0x00,0x20,0xAF,0x0B,0xA7,0x70}; |
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static const ff_asf_guid mediatype_mpeg2_sections = |
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{0x6C,0x17,0x5F,0x45,0x06,0x4B,0xCE,0x47,0x9A,0xEF,0x8C,0xAE,0xF7,0x3D,0xF7,0xB5}; |
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static const ff_asf_guid mediatype_mpeg2_pes = |
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{0x20,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
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static const ff_asf_guid mediatype_mstvcaption = |
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{0x89,0x8A,0x8B,0xB8,0x49,0xB0,0x80,0x4C,0xAD,0xCF,0x58,0x98,0x98,0x5E,0x22,0xC1}; |
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|
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/* Media subtypes */
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static const ff_asf_guid mediasubtype_cpfilters_processed = |
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{0x28,0xBD,0xAD,0x46,0xD0,0x6F,0x96,0x47,0x93,0xB2,0x15,0x5C,0x51,0xDC,0x04,0x8D}; |
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static const ff_asf_guid mediasubtype_dvb_subtitle = |
398 |
{0xC3,0xCB,0xFF,0x34,0xB3,0xD5,0x71,0x41,0x90,0x02,0xD4,0xC6,0x03,0x01,0x69,0x7F}; |
399 |
static const ff_asf_guid mediasubtype_teletext = |
400 |
{0xE3,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
401 |
static const ff_asf_guid mediasubtype_dtvccdata = |
402 |
{0xAA,0xDD,0x2A,0xF5,0xF0,0x36,0xF5,0x43,0x95,0xEA,0x6D,0x86,0x64,0x84,0x26,0x2A}; |
403 |
static const ff_asf_guid mediasubtype_mpeg2_sections = |
404 |
{0x79,0x85,0x9F,0x4A,0xF8,0x6B,0x92,0x43,0x8A,0x6D,0xD2,0xDD,0x09,0xFA,0x78,0x61}; |
405 |
|
406 |
/* Formats */
|
407 |
static const ff_asf_guid format_cpfilters_processed = |
408 |
{0x6F,0xB3,0x39,0x67,0x5F,0x1D,0xC2,0x4A,0x81,0x92,0x28,0xBB,0x0E,0x73,0xD1,0x6A}; |
409 |
static const ff_asf_guid format_waveformatex = |
410 |
{0x81,0x9F,0x58,0x05,0x56,0xC3,0xCE,0x11,0xBF,0x01,0x00,0xAA,0x00,0x55,0x59,0x5A}; |
411 |
static const ff_asf_guid format_videoinfo2 = |
412 |
{0xA0,0x76,0x2A,0xF7,0x0A,0xEB,0xD0,0x11,0xAC,0xE4,0x00,0x00,0xC0,0xCC,0x16,0xBA}; |
413 |
static const ff_asf_guid format_mpeg2_video = |
414 |
{0xE3,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}; |
415 |
static const ff_asf_guid format_none = |
416 |
{0xD6,0x17,0x64,0x0F,0x18,0xC3,0xD0,0x11,0xA4,0x3F,0x00,0xA0,0xC9,0x22,0x31,0x96}; |
417 |
|
418 |
static const AVCodecGuid video_guids[] = { |
419 |
{CODEC_ID_MPEG2VIDEO, {0x26,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}}, |
420 |
{CODEC_ID_NONE} |
421 |
}; |
422 |
|
423 |
static const AVCodecGuid audio_guids[] = { |
424 |
{CODEC_ID_AC3, {0x2C,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}}, |
425 |
{CODEC_ID_EAC3, {0xAF,0x87,0xFB,0xA7,0x02,0x2D,0xFB,0x42,0xA4,0xD4,0x05,0xCD,0x93,0x84,0x3B,0xDD}}, |
426 |
{CODEC_ID_MP2, {0x2B,0x80,0x6D,0xE0,0x46,0xDB,0xCF,0x11,0xB4,0xD1,0x00,0x80,0x5F,0x6C,0xBB,0xEA}}, |
427 |
{CODEC_ID_NONE} |
428 |
}; |
429 |
|
430 |
static int read_probe(AVProbeData *p) |
431 |
{ |
432 |
return ff_guidcmp(p->buf, wtv_guid) ? 0 : AVPROBE_SCORE_MAX; |
433 |
} |
434 |
|
435 |
/**
|
436 |
* Convert win32 FILETIME to ISO-8601 string
|
437 |
*/
|
438 |
static void filetime_to_iso8601(char *buf, int buf_size, int64_t value) |
439 |
{ |
440 |
time_t t = (value / 10000000LL) - 11644473600LL; |
441 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
442 |
} |
443 |
|
444 |
/**
|
445 |
* Convert crazy time (100ns since 1 Jan 0001) to ISO-8601 string
|
446 |
*/
|
447 |
static void crazytime_to_iso8601(char *buf, int buf_size, int64_t value) |
448 |
{ |
449 |
time_t t = (value / 10000000LL) - 719162LL*86400LL; |
450 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
451 |
} |
452 |
|
453 |
/**
|
454 |
* Convert OLE DATE to ISO-8601 string
|
455 |
*/
|
456 |
static void oledate_to_iso8601(char *buf, int buf_size, int64_t value) |
457 |
{ |
458 |
time_t t = 631112400LL + 86400*av_int2dbl(value); |
459 |
strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", gmtime(&t));
|
460 |
} |
461 |
|
462 |
static void get_attachment(AVFormatContext *s, ByteIOContext *pb, int length) |
463 |
{ |
464 |
char mime[1024]; |
465 |
char description[1024]; |
466 |
unsigned int filesize; |
467 |
AVStream *st; |
468 |
int64_t pos = url_ftell(pb); |
469 |
|
470 |
avio_get_str16le(pb, INT_MAX, mime, sizeof(mime));
|
471 |
if (strcmp(mime, "image/jpeg")) |
472 |
goto done;
|
473 |
|
474 |
get_byte(pb); |
475 |
avio_get_str16le(pb, INT_MAX, description, sizeof(description));
|
476 |
filesize = get_le32(pb); |
477 |
if (!filesize)
|
478 |
goto done;
|
479 |
|
480 |
st = av_new_stream(s, 0);
|
481 |
if (!st)
|
482 |
goto done;
|
483 |
av_metadata_set2(&st->metadata, "title", description, 0); |
484 |
st->codec->codec_id = CODEC_ID_MJPEG; |
485 |
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT; |
486 |
st->codec->extradata = av_mallocz(filesize); |
487 |
if (!st->codec->extradata)
|
488 |
goto done;
|
489 |
st->codec->extradata_size = filesize; |
490 |
get_buffer(pb, st->codec->extradata, filesize); |
491 |
done:
|
492 |
url_fseek(pb, pos + length, SEEK_SET); |
493 |
} |
494 |
|
495 |
static void get_tag(AVFormatContext *s, ByteIOContext *pb, const char *key, int type, int length) |
496 |
{ |
497 |
int buf_size = FFMAX(2*length, LEN_PRETTY_GUID) + 1; |
498 |
char *buf = av_malloc(buf_size);
|
499 |
if (!buf)
|
500 |
return;
|
501 |
|
502 |
if (type == 0 && length == 4) { |
503 |
snprintf(buf, buf_size, "%"PRIi32, get_le32(pb));
|
504 |
} else if (type == 1) { |
505 |
avio_get_str16le(pb, length, buf, buf_size); |
506 |
if (!strlen(buf)) {
|
507 |
av_free(buf); |
508 |
return;
|
509 |
} |
510 |
} else if (type == 3 && length == 4) { |
511 |
strcpy(buf, get_le32(pb) ? "true" : "false"); |
512 |
} else if (type == 4 && length == 8) { |
513 |
int64_t num = get_le64(pb); |
514 |
if (!strcmp(key, "WM/EncodingTime") || |
515 |
!strcmp(key, "WM/MediaOriginalBroadcastDateTime"))
|
516 |
filetime_to_iso8601(buf, buf_size, num); |
517 |
else if (!strcmp(key, "WM/WMRVEncodeTime") || |
518 |
!strcmp(key, "WM/WMRVEndTime"))
|
519 |
crazytime_to_iso8601(buf, buf_size, num); |
520 |
else if (!strcmp(key, "WM/WMRVExpirationDate")) |
521 |
oledate_to_iso8601(buf, buf_size, num); |
522 |
else if (!strcmp(key, "WM/WMRVBitrate")) |
523 |
snprintf(buf, buf_size, "%f", av_int2dbl(num));
|
524 |
else
|
525 |
snprintf(buf, buf_size, "%"PRIi64, num);
|
526 |
} else if (type == 5 && length == 2) { |
527 |
snprintf(buf, buf_size, "%"PRIi16, get_le16(pb));
|
528 |
} else if (type == 6 && length == 16) { |
529 |
ff_asf_guid guid; |
530 |
get_buffer(pb, guid, 16);
|
531 |
snprintf(buf, buf_size, PRI_PRETTY_GUID, ARG_PRETTY_GUID(guid)); |
532 |
} else if (type == 2 && !strcmp(key, "WM/Picture")) { |
533 |
get_attachment(s, pb, length); |
534 |
av_freep(&buf); |
535 |
return;
|
536 |
} else {
|
537 |
av_freep(&buf); |
538 |
av_log(s, AV_LOG_WARNING, "unsupported metadata entry; key:%s, type:%d, length:0x%x\n", key, type, length);
|
539 |
url_fskip(pb, length); |
540 |
return;
|
541 |
} |
542 |
|
543 |
av_metadata_set2(&s->metadata, key, buf, 0);
|
544 |
av_freep(&buf); |
545 |
} |
546 |
|
547 |
/**
|
548 |
* Parse metadata entries
|
549 |
*/
|
550 |
static void parse_legacy_attrib(AVFormatContext *s, ByteIOContext *pb) |
551 |
{ |
552 |
ff_asf_guid guid; |
553 |
int length, type;
|
554 |
while(!url_feof(pb)) {
|
555 |
char key[1024]; |
556 |
ff_get_guid(pb, &guid); |
557 |
type = get_le32(pb); |
558 |
length = get_le32(pb); |
559 |
if (!length)
|
560 |
break;
|
561 |
if (ff_guidcmp(&guid, metadata_guid)) {
|
562 |
av_log(s, AV_LOG_WARNING, "unknown guid "PRI_GUID", expected metadata_guid; " |
563 |
"remaining metadata entries ignored\n", ARG_GUID(guid));
|
564 |
break;
|
565 |
} |
566 |
avio_get_str16le(pb, INT_MAX, key, sizeof(key));
|
567 |
get_tag(s, pb, key, type, length); |
568 |
} |
569 |
|
570 |
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
|
571 |
} |
572 |
|
573 |
/**
|
574 |
* parse VIDEOINFOHEADER2 structure
|
575 |
* @return bytes consumed
|
576 |
*/
|
577 |
static int parse_videoinfoheader2(AVFormatContext *s, AVStream *st) |
578 |
{ |
579 |
WtvContext *wtv = s->priv_data; |
580 |
ByteIOContext *pb = wtv->pb; |
581 |
|
582 |
url_fskip(pb, 72); // picture aspect ratio is unreliable |
583 |
ff_get_bmp_header(pb, st); |
584 |
|
585 |
return 72 + 40; |
586 |
} |
587 |
|
588 |
/**
|
589 |
* Parse MPEG1WAVEFORMATEX extradata structure
|
590 |
*/
|
591 |
static void parse_mpeg1waveformatex(AVStream *st) |
592 |
{ |
593 |
/* fwHeadLayer */
|
594 |
switch (AV_RL16(st->codec->extradata)) {
|
595 |
case 0x0001 : st->codec->codec_id = CODEC_ID_MP1; break; |
596 |
case 0x0002 : st->codec->codec_id = CODEC_ID_MP2; break; |
597 |
case 0x0004 : st->codec->codec_id = CODEC_ID_MP3; break; |
598 |
} |
599 |
|
600 |
st->codec->bit_rate = AV_RL32(st->codec->extradata + 2); /* dwHeadBitrate */ |
601 |
|
602 |
/* dwHeadMode */
|
603 |
switch (AV_RL16(st->codec->extradata + 6)) { |
604 |
case 1 : case 2 : case 4 : st->codec->channels = 2; break; |
605 |
case 8 : st->codec->channels = 1; break; |
606 |
} |
607 |
} |
608 |
|
609 |
/**
|
610 |
* Initialise stream
|
611 |
* @param st Stream to initialise, or NULL to create and initialise new stream
|
612 |
* @return NULL on error
|
613 |
*/
|
614 |
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type) |
615 |
{ |
616 |
if (st) {
|
617 |
if (st->codec->extradata) {
|
618 |
av_freep(&st->codec->extradata); |
619 |
st->codec->extradata_size = 0;
|
620 |
} |
621 |
} else {
|
622 |
WtvStream *wst = av_mallocz(sizeof(WtvStream));
|
623 |
if (!wst)
|
624 |
return NULL; |
625 |
st = av_new_stream(s, sid); |
626 |
if (!st)
|
627 |
return NULL; |
628 |
st->priv_data = wst; |
629 |
} |
630 |
st->codec->codec_type = codec_type; |
631 |
st->need_parsing = AVSTREAM_PARSE_FULL; |
632 |
av_set_pts_info(st, 64, 1, 10000000); |
633 |
return st;
|
634 |
} |
635 |
|
636 |
/**
|
637 |
* parse Media Type structure and populate stream
|
638 |
* @param st Stream, or NULL to create new stream
|
639 |
* @param mediatype Mediatype GUID
|
640 |
* @param subtype Subtype GUID
|
641 |
* @param formattype Format GUID
|
642 |
* @param size Size of format buffer
|
643 |
* @return NULL on error
|
644 |
*/
|
645 |
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid, |
646 |
ff_asf_guid mediatype, ff_asf_guid subtype, |
647 |
ff_asf_guid formattype, int size)
|
648 |
{ |
649 |
WtvContext *wtv = s->priv_data; |
650 |
ByteIOContext *pb = wtv->pb; |
651 |
if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
|
652 |
!ff_guidcmp(formattype, format_cpfilters_processed)) { |
653 |
ff_asf_guid actual_subtype; |
654 |
ff_asf_guid actual_formattype; |
655 |
|
656 |
if (size < 32) { |
657 |
av_log(s, AV_LOG_WARNING, "format buffer size underflow\n");
|
658 |
url_fskip(pb, size); |
659 |
return NULL; |
660 |
} |
661 |
|
662 |
url_fskip(pb, size - 32);
|
663 |
ff_get_guid(pb, &actual_subtype); |
664 |
ff_get_guid(pb, &actual_formattype); |
665 |
url_fseek(pb, -size, SEEK_CUR); |
666 |
|
667 |
st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
|
668 |
url_fskip(pb, 32);
|
669 |
return st;
|
670 |
} else if (!ff_guidcmp(mediatype, mediatype_audio)) { |
671 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO); |
672 |
if (!st)
|
673 |
return NULL; |
674 |
if (!ff_guidcmp(formattype, format_waveformatex)) {
|
675 |
ff_get_wav_header(pb, st->codec, size); |
676 |
} else {
|
677 |
if (ff_guidcmp(formattype, format_none))
|
678 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
679 |
url_fskip(pb, size); |
680 |
} |
681 |
|
682 |
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { |
683 |
st->codec->codec_id = ff_wav_codec_get_id(AV_RL32(subtype), st->codec->bits_per_coded_sample); |
684 |
} else if (!ff_guidcmp(subtype, mediasubtype_mpeg1payload)) { |
685 |
if (st->codec->extradata && st->codec->extradata_size >= 22) |
686 |
parse_mpeg1waveformatex(st); |
687 |
else
|
688 |
av_log(s, AV_LOG_WARNING, "MPEG1WAVEFORMATEX underflow\n");
|
689 |
} else {
|
690 |
st->codec->codec_id = ff_codec_guid_get_id(audio_guids, subtype); |
691 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
692 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); |
693 |
} |
694 |
return st;
|
695 |
} else if (!ff_guidcmp(mediatype, mediatype_video)) { |
696 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO); |
697 |
if (!st)
|
698 |
return NULL; |
699 |
if (!ff_guidcmp(formattype, format_videoinfo2)) {
|
700 |
int consumed = parse_videoinfoheader2(s, st);
|
701 |
url_fskip(pb, FFMAX(size - consumed, 0));
|
702 |
} else if (!ff_guidcmp(formattype, format_mpeg2_video)) { |
703 |
int consumed = parse_videoinfoheader2(s, st);
|
704 |
url_fskip(pb, FFMAX(size - consumed, 0));
|
705 |
} else {
|
706 |
if (ff_guidcmp(formattype, format_none))
|
707 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
708 |
url_fskip(pb, size); |
709 |
} |
710 |
|
711 |
if (!memcmp(subtype + 4, (const uint8_t[]){MEDIASUBTYPE_BASE_GUID}, 12)) { |
712 |
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, AV_RL32(subtype)); |
713 |
} else {
|
714 |
st->codec->codec_id = ff_codec_guid_get_id(video_guids, subtype); |
715 |
} |
716 |
if (st->codec->codec_id == CODEC_ID_NONE)
|
717 |
av_log(s, AV_LOG_WARNING, "unknown subtype:"PRI_GUID"\n", ARG_GUID(subtype)); |
718 |
return st;
|
719 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) && |
720 |
!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) { |
721 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
722 |
if (!st)
|
723 |
return NULL; |
724 |
if (ff_guidcmp(formattype, format_none))
|
725 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
726 |
url_fskip(pb, size); |
727 |
st->codec->codec_id = CODEC_ID_DVB_SUBTITLE; |
728 |
return st;
|
729 |
} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) && |
730 |
(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) { |
731 |
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE); |
732 |
if (!st)
|
733 |
return NULL; |
734 |
if (ff_guidcmp(formattype, format_none))
|
735 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
736 |
url_fskip(pb, size); |
737 |
st->codec->codec_id = CODEC_ID_DVB_TELETEXT; |
738 |
return st;
|
739 |
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_sections) && |
740 |
!ff_guidcmp(subtype, mediasubtype_mpeg2_sections)) { |
741 |
if (ff_guidcmp(formattype, format_none))
|
742 |
av_log(s, AV_LOG_WARNING, "unknown formattype:"PRI_GUID"\n", ARG_GUID(formattype)); |
743 |
url_fskip(pb, size); |
744 |
return NULL; |
745 |
} |
746 |
|
747 |
av_log(s, AV_LOG_WARNING, "unknown media type, mediatype:"PRI_GUID
|
748 |
", subtype:"PRI_GUID", formattype:"PRI_GUID"\n", |
749 |
ARG_GUID(mediatype), ARG_GUID(subtype), ARG_GUID(formattype)); |
750 |
url_fskip(pb, size); |
751 |
return NULL; |
752 |
} |
753 |
|
754 |
enum {
|
755 |
SEEK_TO_DATA = 0,
|
756 |
SEEK_TO_PTS, |
757 |
}; |
758 |
|
759 |
/**
|
760 |
* Parse WTV chunks
|
761 |
* @param mode SEEK_TO_DATA or SEEK_TO_PTS
|
762 |
* @param seekts timestamp
|
763 |
* @param[out] len Length of data chunk
|
764 |
* @return stream index of data chunk, or <0 on error
|
765 |
*/
|
766 |
static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_ptr) |
767 |
{ |
768 |
WtvContext *wtv = s->priv_data; |
769 |
ByteIOContext *pb = wtv->pb; |
770 |
while (!url_feof(pb)) {
|
771 |
ff_asf_guid g; |
772 |
int len, sid, consumed;
|
773 |
|
774 |
ff_get_guid(pb, &g); |
775 |
len = get_le32(pb); |
776 |
if (len < 32) |
777 |
break;
|
778 |
sid = get_le32(pb) & 0x7FFF;
|
779 |
url_fskip(pb, 8);
|
780 |
consumed = 32;
|
781 |
|
782 |
if (!ff_guidcmp(g, stream_guid)) {
|
783 |
if (ff_find_stream_index(s, sid) < 0) { |
784 |
ff_asf_guid mediatype, subtype, formattype; |
785 |
int size;
|
786 |
consumed += 20;
|
787 |
url_fskip(pb, 16);
|
788 |
if (get_le32(pb)) {
|
789 |
url_fskip(pb, 8);
|
790 |
ff_get_guid(pb, &mediatype); |
791 |
ff_get_guid(pb, &subtype); |
792 |
url_fskip(pb, 12);
|
793 |
ff_get_guid(pb, &formattype); |
794 |
size = get_le32(pb); |
795 |
parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
|
796 |
consumed += 72 + size;
|
797 |
} |
798 |
} |
799 |
} else if (!ff_guidcmp(g, stream2_guid)) { |
800 |
int stream_index = ff_find_stream_index(s, sid);
|
801 |
if (stream_index >= 0 && !((WtvStream*)s->streams[stream_index]->priv_data)->seen_data) { |
802 |
ff_asf_guid mediatype, subtype, formattype; |
803 |
int size;
|
804 |
url_fskip(pb, 12);
|
805 |
ff_get_guid(pb, &mediatype); |
806 |
ff_get_guid(pb, &subtype); |
807 |
url_fskip(pb, 12);
|
808 |
ff_get_guid(pb, &formattype); |
809 |
size = get_le32(pb); |
810 |
parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); |
811 |
consumed += 76 + size;
|
812 |
} |
813 |
} else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) || |
814 |
!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) || |
815 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) || |
816 |
!ff_guidcmp(g, EVENTID_StreamIDSpanningEvent) || |
817 |
!ff_guidcmp(g, EVENTID_SubtitleSpanningEvent) || |
818 |
!ff_guidcmp(g, EVENTID_TeletextSpanningEvent)) { |
819 |
int stream_index = ff_find_stream_index(s, sid);
|
820 |
if (stream_index >= 0) { |
821 |
AVStream *st = s->streams[stream_index]; |
822 |
uint8_t buf[258];
|
823 |
const uint8_t *pbuf = buf;
|
824 |
int buf_size;
|
825 |
|
826 |
url_fskip(pb, 8);
|
827 |
consumed += 8;
|
828 |
if (!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
|
829 |
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent)) { |
830 |
url_fskip(pb, 6);
|
831 |
consumed += 6;
|
832 |
} |
833 |
|
834 |
buf_size = FFMIN(len - consumed, sizeof(buf));
|
835 |
get_buffer(pb, buf, buf_size); |
836 |
consumed += buf_size; |
837 |
ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0); |
838 |
} |
839 |
} else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) { |
840 |
int stream_index = ff_find_stream_index(s, sid);
|
841 |
if (stream_index >= 0) { |
842 |
url_fskip(pb, 12);
|
843 |
if (get_le32(pb))
|
844 |
av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
|
845 |
consumed += 16;
|
846 |
} |
847 |
} else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) { |
848 |
int stream_index = ff_find_stream_index(s, sid);
|
849 |
if (stream_index >= 0) { |
850 |
AVStream *st = s->streams[stream_index]; |
851 |
uint8_t language[4];
|
852 |
url_fskip(pb, 12);
|
853 |
get_buffer(pb, language, 3);
|
854 |
if (language[0]) { |
855 |
language[3] = 0; |
856 |
av_metadata_set2(&st->metadata, "language", language, 0); |
857 |
} |
858 |
consumed += 15;
|
859 |
} |
860 |
} else if (!ff_guidcmp(g, timestamp_guid)) { |
861 |
int stream_index = ff_find_stream_index(s, sid);
|
862 |
if (stream_index >= 0) { |
863 |
url_fskip(pb, 8);
|
864 |
wtv->pts = get_le64(pb); |
865 |
consumed += 16;
|
866 |
if (wtv->pts == -1) |
867 |
wtv->pts = AV_NOPTS_VALUE; |
868 |
else {
|
869 |
wtv->last_valid_pts = wtv->pts; |
870 |
if (wtv->epoch == AV_NOPTS_VALUE || wtv->pts < wtv->epoch)
|
871 |
wtv->epoch = wtv->pts; |
872 |
if (mode == SEEK_TO_PTS && wtv->pts >= seekts) {
|
873 |
#define WTV_PAD8(x) (((x) + 7) & ~7) |
874 |
url_fskip(pb, WTV_PAD8(len) - consumed); |
875 |
return 0; |
876 |
} |
877 |
} |
878 |
} |
879 |
} else if (!ff_guidcmp(g, data_guid)) { |
880 |
int stream_index = ff_find_stream_index(s, sid);
|
881 |
if (mode == SEEK_TO_DATA && stream_index >= 0) { |
882 |
WtvStream *wst = s->streams[stream_index]->priv_data; |
883 |
wst->seen_data = 1;
|
884 |
if (len_ptr) {
|
885 |
*len_ptr = len; |
886 |
} |
887 |
return stream_index;
|
888 |
} |
889 |
} else if ( |
890 |
!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}) || |
891 |
!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}) || |
892 |
!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}) || |
893 |
!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}) || |
894 |
!ff_guidcmp(g, /* EVENTID_AudioTypeSpanningEvent */ (const ff_asf_guid){0xBE,0xBF,0x1C,0x50,0x49,0xB8,0xCE,0x42,0x9B,0xE9,0x3D,0xB8,0x69,0xFB,0x82,0xB3}) || |
895 |
!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}) || |
896 |
!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}) || |
897 |
!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}) || |
898 |
!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}) || |
899 |
!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}) || |
900 |
!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}) || |
901 |
!ff_guidcmp(g, (const ff_asf_guid){0x1E,0xBE,0xC3,0xC5,0x43,0x92,0xDC,0x11,0x85,0xE5,0x00,0x12,0x3F,0x6F,0x73,0xB9}) || |
902 |
!ff_guidcmp(g, (const ff_asf_guid){0x3B,0x86,0xA2,0xB1,0xEB,0x1E,0xC3,0x44,0x8C,0x88,0x1C,0xA3,0xFF,0xE3,0xE7,0x6A}) || |
903 |
!ff_guidcmp(g, (const ff_asf_guid){0x4E,0x7F,0x4C,0x5B,0xC4,0xD0,0x38,0x4B,0xA8,0x3E,0x21,0x7F,0x7B,0xBF,0x52,0xE7}) || |
904 |
!ff_guidcmp(g, (const ff_asf_guid){0x63,0x36,0xEB,0xFE,0xA1,0x7E,0xD9,0x11,0x83,0x08,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
905 |
!ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) || |
906 |
!ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
907 |
!ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) || |
908 |
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) { |
909 |
//ignore known guids
|
910 |
} else
|
911 |
av_log(s, AV_LOG_WARNING, "unsupported chunk:"PRI_GUID"\n", ARG_GUID(g)); |
912 |
|
913 |
url_fskip(pb, WTV_PAD8(len) - consumed); |
914 |
} |
915 |
return AVERROR_EOF;
|
916 |
} |
917 |
|
918 |
/* declare utf16le strings */
|
919 |
#define _ , 0, |
920 |
static const uint8_t timeline_le16[] = |
921 |
{'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e', 0}; |
922 |
static const uint8_t table_0_entries_legacy_attrib_le16[] = |
923 |
{'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}; |
924 |
static const uint8_t table_0_entries_time_le16[] = |
925 |
{'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'e'_'n'_'t'_'r'_'i'_'e'_'s'_'.'_'t'_'i'_'m'_'e', 0}; |
926 |
static const uint8_t timeline_table_0_entries_Events_le16[] = |
927 |
{'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}; |
928 |
#undef _
|
929 |
|
930 |
static int read_header(AVFormatContext *s, AVFormatParameters *ap) |
931 |
{ |
932 |
WtvContext *wtv = s->priv_data; |
933 |
int root_sector, root_size;
|
934 |
uint8_t root[WTV_SECTOR_SIZE]; |
935 |
ByteIOContext *pb; |
936 |
int64_t timeline_pos; |
937 |
int ret;
|
938 |
|
939 |
wtv->epoch = |
940 |
wtv->pts = |
941 |
wtv->last_valid_pts = AV_NOPTS_VALUE; |
942 |
|
943 |
/* read root directory sector */
|
944 |
url_fskip(s->pb, 0x30);
|
945 |
root_size = get_le32(s->pb); |
946 |
if (root_size > sizeof(root)) { |
947 |
av_log(s, AV_LOG_ERROR, "root directory size exceeds sector size\n");
|
948 |
return AVERROR_INVALIDDATA;
|
949 |
} |
950 |
url_fskip(s->pb, 4);
|
951 |
root_sector = get_le32(s->pb); |
952 |
|
953 |
url_fseek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET); |
954 |
root_size = get_buffer(s->pb, root, root_size); |
955 |
if (root_size < 0) |
956 |
return AVERROR_INVALIDDATA;
|
957 |
|
958 |
/* parse chunks up until first data chunk */
|
959 |
wtv->pb = wtvfile_open(s, root, root_size, timeline_le16); |
960 |
if (!wtv->pb) {
|
961 |
av_log(s, AV_LOG_ERROR, "timeline data missing\n");
|
962 |
return AVERROR_INVALIDDATA;
|
963 |
} |
964 |
|
965 |
ret = parse_chunks(s, SEEK_TO_DATA, 0, 0); |
966 |
if (ret < 0) |
967 |
return ret;
|
968 |
url_fseek(wtv->pb, -32, SEEK_CUR);
|
969 |
|
970 |
timeline_pos = url_ftell(s->pb); // save before opening another file
|
971 |
|
972 |
/* read metadata */
|
973 |
pb = wtvfile_open(s, root, root_size, table_0_entries_legacy_attrib_le16); |
974 |
if (pb) {
|
975 |
parse_legacy_attrib(s, pb); |
976 |
wtvfile_close(pb); |
977 |
} |
978 |
|
979 |
/* read seek index */
|
980 |
if (s->nb_streams) {
|
981 |
AVStream *st = s->streams[0];
|
982 |
pb = wtvfile_open(s, root, root_size, table_0_entries_time_le16); |
983 |
if (pb) {
|
984 |
while(1) { |
985 |
uint64_t timestamp = get_le64(pb); |
986 |
uint64_t frame_nb = get_le64(pb); |
987 |
if (url_feof(pb))
|
988 |
break;
|
989 |
ff_add_index_entry(&wtv->index_entries, &wtv->nb_index_entries, &wtv->index_entries_allocated_size, |
990 |
0, timestamp, frame_nb, 0, AVINDEX_KEYFRAME); |
991 |
} |
992 |
wtvfile_close(pb); |
993 |
|
994 |
if (wtv->nb_index_entries) {
|
995 |
pb = wtvfile_open(s, root, root_size, timeline_table_0_entries_Events_le16); |
996 |
if (pb) {
|
997 |
int i;
|
998 |
while (1) { |
999 |
uint64_t frame_nb = get_le64(pb); |
1000 |
uint64_t position = get_le64(pb); |
1001 |
if (url_feof(pb))
|
1002 |
break;
|
1003 |
for (i = wtv->nb_index_entries - 1; i >= 0; i--) { |
1004 |
AVIndexEntry *e = wtv->index_entries + i; |
1005 |
if (frame_nb > e->size)
|
1006 |
break;
|
1007 |
if (position > e->pos)
|
1008 |
e->pos = position; |
1009 |
} |
1010 |
} |
1011 |
wtvfile_close(pb); |
1012 |
st->duration = wtv->index_entries[wtv->nb_index_entries - 1].timestamp;
|
1013 |
} |
1014 |
} |
1015 |
} |
1016 |
} |
1017 |
|
1018 |
url_fseek(s->pb, timeline_pos, SEEK_SET); |
1019 |
return 0; |
1020 |
} |
1021 |
|
1022 |
static int read_packet(AVFormatContext *s, AVPacket *pkt) |
1023 |
{ |
1024 |
WtvContext *wtv = s->priv_data; |
1025 |
ByteIOContext *pb = wtv->pb; |
1026 |
int stream_index, len, ret;
|
1027 |
|
1028 |
stream_index = parse_chunks(s, SEEK_TO_DATA, 0, &len);
|
1029 |
if (stream_index < 0) |
1030 |
return stream_index;
|
1031 |
|
1032 |
ret = av_get_packet(pb, pkt, len - 32);
|
1033 |
if (ret < 0) |
1034 |
return ret;
|
1035 |
pkt->stream_index = stream_index; |
1036 |
pkt->pts = wtv->pts; |
1037 |
url_fskip(pb, WTV_PAD8(len) - len); |
1038 |
return 0; |
1039 |
} |
1040 |
|
1041 |
static int read_seek(AVFormatContext *s, int stream_index, |
1042 |
int64_t ts, int flags)
|
1043 |
{ |
1044 |
WtvContext *wtv = s->priv_data; |
1045 |
ByteIOContext *pb = wtv->pb; |
1046 |
AVStream *st = s->streams[0];
|
1047 |
int64_t ts_relative; |
1048 |
int i;
|
1049 |
|
1050 |
if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
|
1051 |
return AVERROR_NOTSUPP;
|
1052 |
|
1053 |
/* timestamp adjustment is required because wtv->pts values are absolute,
|
1054 |
* whereas AVIndexEntry->timestamp values are relative to epoch. */
|
1055 |
ts_relative = ts; |
1056 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
1057 |
ts_relative -= wtv->epoch; |
1058 |
|
1059 |
i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags); |
1060 |
if (i < 0) { |
1061 |
if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
|
1062 |
url_fseek(pb, 0, SEEK_SET);
|
1063 |
else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries) |
1064 |
url_fseek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
|
1065 |
if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0) |
1066 |
return AVERROR(ERANGE);
|
1067 |
return 0; |
1068 |
} |
1069 |
wtv->pts = wtv->index_entries[i].timestamp; |
1070 |
if (wtv->epoch != AV_NOPTS_VALUE)
|
1071 |
wtv->pts += wtv->epoch; |
1072 |
wtv->last_valid_pts = wtv->pts; |
1073 |
url_fseek(pb, wtv->index_entries[i].pos, SEEK_SET); |
1074 |
return 0; |
1075 |
} |
1076 |
|
1077 |
static int read_close(AVFormatContext *s) |
1078 |
{ |
1079 |
WtvContext *wtv = s->priv_data; |
1080 |
wtvfile_close(wtv->pb); |
1081 |
return 0; |
1082 |
} |
1083 |
|
1084 |
AVInputFormat ff_wtv_demuxer = { |
1085 |
.name = "wtv",
|
1086 |
.long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
|
1087 |
.priv_data_size = sizeof(WtvContext),
|
1088 |
.read_probe = read_probe, |
1089 |
.read_header = read_header, |
1090 |
.read_packet = read_packet, |
1091 |
.read_seek = read_seek, |
1092 |
.read_close = read_close, |
1093 |
.flags = AVFMT_SHOW_IDS, |
1094 |
}; |