72415b2adb
is deprecated and will be dropped at the next major bump. Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
270 lines
8.2 KiB
C
270 lines
8.2 KiB
C
/*
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* Bink demuxer
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* Copyright (c) 2008-2010 Peter Ross (pross@xvid.org)
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* Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu)
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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 libavformat/bink.c
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* Bink demuxer
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*
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* Technical details here:
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* http://wiki.multimedia.cx/index.php?title=Bink_Container
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*/
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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enum BinkAudFlags {
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BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
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BINK_AUD_STEREO = 0x2000,
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BINK_AUD_USEDCT = 0x1000,
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};
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#define BINK_EXTRADATA_SIZE 1
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#define BINK_MAX_AUDIO_TRACKS 256
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#define BINK_MAX_WIDTH 7680
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#define BINK_MAX_HEIGHT 4800
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typedef struct {
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uint32_t file_size;
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uint32_t num_audio_tracks;
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int current_track; ///< audio track to return in next packet
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int64_t video_pts;
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int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
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uint32_t remain_packet_size;
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} BinkDemuxContext;
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static int probe(AVProbeData *p)
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{
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const uint8_t *b = p->buf;
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if ( b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
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(b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i') &&
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AV_RL32(b+8) > 0 && // num_frames
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AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
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AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
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AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int read_header(AVFormatContext *s, AVFormatParameters *ap)
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{
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BinkDemuxContext *bink = s->priv_data;
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ByteIOContext *pb = s->pb;
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uint32_t fps_num, fps_den;
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AVStream *vst, *ast;
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unsigned int i;
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uint32_t pos, next_pos;
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uint16_t flags;
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int keyframe;
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vst = av_new_stream(s, 0);
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if (!vst)
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return AVERROR(ENOMEM);
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vst->codec->codec_tag = get_le32(pb);
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bink->file_size = get_le32(pb) + 8;
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vst->duration = get_le32(pb);
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if (vst->duration > 1000000) {
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av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
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return AVERROR(EIO);
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}
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if (get_le32(pb) > bink->file_size) {
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av_log(s, AV_LOG_ERROR,
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"invalid header: largest frame size greater than file size\n");
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return AVERROR(EIO);
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}
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url_fskip(pb, 4);
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vst->codec->width = get_le32(pb);
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vst->codec->height = get_le32(pb);
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fps_num = get_le32(pb);
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fps_den = get_le32(pb);
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if (fps_num == 0 || fps_den == 0) {
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av_log(s, AV_LOG_ERROR, "invalid header: invalid fps (%d/%d)\n", fps_num, fps_den);
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return AVERROR(EIO);
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}
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av_set_pts_info(vst, 64, fps_den, fps_num);
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vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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vst->codec->codec_id = CODEC_ID_BINKVIDEO;
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vst->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE);
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vst->codec->extradata_size = 4;
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get_buffer(pb, vst->codec->extradata, 4);
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bink->num_audio_tracks = get_le32(pb);
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if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
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av_log(s, AV_LOG_ERROR,
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"invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%d)\n",
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bink->num_audio_tracks);
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return AVERROR(EIO);
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}
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if (bink->num_audio_tracks) {
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url_fskip(pb, 4 * bink->num_audio_tracks);
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for (i = 0; i < bink->num_audio_tracks; i++) {
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ast = av_new_stream(s, 1);
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if (!ast)
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return AVERROR(ENOMEM);
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ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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ast->codec->codec_tag = 0;
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ast->codec->sample_rate = get_le16(pb);
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av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
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flags = get_le16(pb);
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ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
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CODEC_ID_BINKAUDIO_DCT : CODEC_ID_BINKAUDIO_RDFT;
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ast->codec->channels = flags & BINK_AUD_STEREO ? 2 : 1;
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}
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url_fskip(pb, 4 * bink->num_audio_tracks);
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}
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/* frame index table */
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next_pos = get_le32(pb);
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for (i = 0; i < vst->duration; i++) {
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pos = next_pos;
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if (i == vst->duration - 1) {
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next_pos = bink->file_size;
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keyframe = 0;
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} else {
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next_pos = get_le32(pb);
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keyframe = pos & 1;
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}
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pos &= ~1;
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next_pos &= ~1;
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if (next_pos <= pos) {
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av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
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return AVERROR(EIO);
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}
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av_add_index_entry(vst, pos, i, next_pos - pos, 0,
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keyframe ? AVINDEX_KEYFRAME : 0);
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}
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url_fskip(pb, 4);
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bink->current_track = -1;
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return 0;
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}
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static int read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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BinkDemuxContext *bink = s->priv_data;
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ByteIOContext *pb = s->pb;
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int ret;
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if (bink->current_track < 0) {
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int index_entry;
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AVStream *st = s->streams[0]; // stream 0 is video stream with index
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if (bink->video_pts >= st->duration)
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return AVERROR(EIO);
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index_entry = av_index_search_timestamp(st, bink->video_pts,
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AVSEEK_FLAG_ANY);
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if (index_entry < 0) {
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av_log(s, AV_LOG_ERROR,
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"could not find index entry for frame %"PRId64"\n",
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bink->video_pts);
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return AVERROR(EIO);
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}
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bink->remain_packet_size = st->index_entries[index_entry].size;
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bink->current_track = 0;
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}
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while (bink->current_track < bink->num_audio_tracks) {
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uint32_t audio_size = get_le32(pb);
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if (audio_size > bink->remain_packet_size - 4) {
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av_log(s, AV_LOG_ERROR,
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"frame %"PRId64": audio size in header (%u) > size of packet left (%u)\n",
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bink->video_pts, audio_size, bink->remain_packet_size);
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return AVERROR(EIO);
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}
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bink->remain_packet_size -= 4 + audio_size;
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bink->current_track++;
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if (audio_size >= 4) {
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/* get one audio packet per track */
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if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
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return ret;
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pkt->stream_index = bink->current_track;
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pkt->pts = bink->audio_pts[bink->current_track - 1];
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/* Each audio packet reports the number of decompressed samples
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(in bytes). We use this value to calcuate the audio PTS */
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if (pkt->size >= 4)
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bink->audio_pts[bink->current_track -1] +=
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AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
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return 0;
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} else {
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url_fseek(pb, audio_size, SEEK_CUR);
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}
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}
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/* get video packet */
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if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
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return ret;
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pkt->stream_index = 0;
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pkt->pts = bink->video_pts++;
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pkt->flags |= PKT_FLAG_KEY;
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/* -1 instructs the next call to read_packet() to read the next frame */
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bink->current_track = -1;
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return 0;
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}
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static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
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{
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BinkDemuxContext *bink = s->priv_data;
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AVStream *vst = s->streams[0];
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if (url_is_streamed(s->pb))
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return -1;
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/* seek to the first frame */
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url_fseek(s->pb, vst->index_entries[0].pos, SEEK_SET);
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bink->video_pts = 0;
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memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
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bink->current_track = -1;
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return 0;
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}
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AVInputFormat bink_demuxer = {
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"bink",
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NULL_IF_CONFIG_SMALL("Bink"),
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sizeof(BinkDemuxContext),
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probe,
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read_header,
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read_packet,
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NULL,
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read_seek,
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};
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