335 lines
11 KiB
C
Executable file
335 lines
11 KiB
C
Executable file
/*
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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
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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 <inttypes.h>
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#include "libavutil/channel_layout.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.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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#define SMUSH_BLOCK_SIZE 512
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typedef struct BinkDemuxContext {
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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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int flags;
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int smush_size;
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} BinkDemuxContext;
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static int probe(const AVProbeData *p)
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{
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const uint8_t *b = p->buf;
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int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
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do {
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if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */
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(b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' ||
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b[3] == 'k')) ||
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(b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
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(b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' ||
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b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) &&
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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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b += SMUSH_BLOCK_SIZE;
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} while (smush && b < p->buf + p->buf_size - 32);
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return 0;
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}
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static int read_header(AVFormatContext *s)
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{
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BinkDemuxContext *bink = s->priv_data;
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AVIOContext *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 next_keyframe = 1;
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int keyframe;
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int ret;
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uint32_t signature;
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uint8_t revision;
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vst = avformat_new_stream(s, NULL);
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if (!vst)
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return AVERROR(ENOMEM);
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vst->codecpar->codec_tag = avio_rl32(pb);
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if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
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do {
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bink->smush_size += SMUSH_BLOCK_SIZE;
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avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
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vst->codecpar->codec_tag = avio_rl32(pb);
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} while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
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if (avio_feof(pb)) {
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av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
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return AVERROR_INVALIDDATA;
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}
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}
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bink->file_size = avio_rl32(pb) + 8;
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vst->duration = avio_rl32(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 (avio_rl32(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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avio_skip(pb, 4);
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vst->codecpar->width = avio_rl32(pb);
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vst->codecpar->height = avio_rl32(pb);
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fps_num = avio_rl32(pb);
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fps_den = avio_rl32(pb);
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if (fps_num == 0 || fps_den == 0) {
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av_log(s, AV_LOG_ERROR,
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"invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
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fps_num, fps_den);
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return AVERROR(EIO);
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}
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avpriv_set_pts_info(vst, 64, fps_den, fps_num);
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vst->avg_frame_rate = av_inv_q(vst->time_base);
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vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO;
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if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
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av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
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vst->codecpar->codec_id = AV_CODEC_ID_NONE;
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}
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if ((ret = ff_get_extradata(s, vst->codecpar, pb, 4)) < 0)
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return ret;
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bink->num_audio_tracks = avio_rl32(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 (%"PRIu32")\n",
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bink->num_audio_tracks);
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return AVERROR(EIO);
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}
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signature = (vst->codecpar->codec_tag & 0xFFFFFF);
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revision = ((vst->codecpar->codec_tag >> 24) % 0xFF);
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if ((signature == AV_RL32("BIK") && (revision == 'k')) ||
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(signature == AV_RL32("KB2") && (revision == 'i' || revision == 'j' || revision == 'k')))
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avio_skip(pb, 4); /* unknown new field */
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if (bink->num_audio_tracks) {
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avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */
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for (i = 0; i < bink->num_audio_tracks; i++) {
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ast = avformat_new_stream(s, NULL);
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if (!ast)
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return AVERROR(ENOMEM);
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ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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ast->codecpar->codec_tag = 0;
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ast->codecpar->sample_rate = avio_rl16(pb);
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avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
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flags = avio_rl16(pb);
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ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
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AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
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if (flags & BINK_AUD_STEREO) {
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ast->codecpar->channels = 2;
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ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
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} else {
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ast->codecpar->channels = 1;
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ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
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}
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if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0)
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return ret;
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AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
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}
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for (i = 0; i < bink->num_audio_tracks; i++)
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s->streams[i + 1]->id = avio_rl32(pb);
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}
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/* frame index table */
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next_pos = avio_rl32(pb);
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for (i = 0; i < vst->duration; i++) {
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pos = next_pos;
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keyframe = next_keyframe;
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if (i == vst->duration - 1) {
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next_pos = bink->file_size;
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next_keyframe = 0;
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} else {
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next_pos = avio_rl32(pb);
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next_keyframe = next_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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if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
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keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
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return ret;
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}
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if (vst->index_entries)
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avio_seek(pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
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else
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avio_skip(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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AVIOContext *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_EOF;
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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->flags = st->index_entries[index_entry].flags;
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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 = avio_rl32(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 (%"PRIu32") > size of packet left (%"PRIu32")\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 calculate 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]->codecpar->channels);
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return 0;
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} else {
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avio_skip(pb, audio_size);
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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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if (bink->flags & AVINDEX_KEYFRAME)
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pkt->flags |= AV_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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int64_t ret;
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if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
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return -1;
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/* seek to the first frame */
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ret = avio_seek(s->pb, vst->index_entries[0].pos + bink->smush_size, SEEK_SET);
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if (ret < 0)
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return ret;
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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 ff_bink_demuxer = {
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.name = "bink",
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.long_name = NULL_IF_CONFIG_SMALL("Bink"),
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.priv_data_size = sizeof(BinkDemuxContext),
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.read_probe = probe,
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.read_header = read_header,
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.read_packet = read_packet,
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.read_seek = read_seek,
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.flags = AVFMT_SHOW_IDS,
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};
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