3 * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org)
4 * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu)
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 * Technical details here:
28 * http://wiki.multimedia.cx/index.php?title=Bink_Container
31 #include "libavutil/intreadwrite.h"
35 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
36 BINK_AUD_STEREO = 0x2000,
37 BINK_AUD_USEDCT = 0x1000,
40 #define BINK_EXTRADATA_SIZE 1
41 #define BINK_MAX_AUDIO_TRACKS 256
42 #define BINK_MAX_WIDTH 7680
43 #define BINK_MAX_HEIGHT 4800
48 uint32_t num_audio_tracks;
49 int current_track; ///< audio track to return in next packet
51 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
53 uint32_t remain_packet_size;
56 static int probe(AVProbeData *p)
58 const uint8_t *b = p->buf;
60 if ( b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
61 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i') &&
62 AV_RL32(b+8) > 0 && // num_frames
63 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
64 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
65 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
66 return AVPROBE_SCORE_MAX;
70 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
72 BinkDemuxContext *bink = s->priv_data;
73 AVIOContext *pb = s->pb;
74 uint32_t fps_num, fps_den;
77 uint32_t pos, next_pos;
81 vst = av_new_stream(s, 0);
83 return AVERROR(ENOMEM);
85 vst->codec->codec_tag = avio_rl32(pb);
87 bink->file_size = avio_rl32(pb) + 8;
88 vst->duration = avio_rl32(pb);
90 if (vst->duration > 1000000) {
91 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
95 if (avio_rl32(pb) > bink->file_size) {
96 av_log(s, AV_LOG_ERROR,
97 "invalid header: largest frame size greater than file size\n");
103 vst->codec->width = avio_rl32(pb);
104 vst->codec->height = avio_rl32(pb);
106 fps_num = avio_rl32(pb);
107 fps_den = avio_rl32(pb);
108 if (fps_num == 0 || fps_den == 0) {
109 av_log(s, AV_LOG_ERROR, "invalid header: invalid fps (%d/%d)\n", fps_num, fps_den);
112 av_set_pts_info(vst, 64, fps_den, fps_num);
114 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
115 vst->codec->codec_id = CODEC_ID_BINKVIDEO;
116 vst->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE);
117 vst->codec->extradata_size = 4;
118 avio_read(pb, vst->codec->extradata, 4);
120 bink->num_audio_tracks = avio_rl32(pb);
122 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
123 av_log(s, AV_LOG_ERROR,
124 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%d)\n",
125 bink->num_audio_tracks);
129 if (bink->num_audio_tracks) {
130 avio_skip(pb, 4 * bink->num_audio_tracks);
132 for (i = 0; i < bink->num_audio_tracks; i++) {
133 ast = av_new_stream(s, 1);
135 return AVERROR(ENOMEM);
136 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
137 ast->codec->sample_rate = avio_rl16(pb);
138 av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
139 flags = avio_rl16(pb);
140 ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
141 CODEC_ID_BINKAUDIO_DCT : CODEC_ID_BINKAUDIO_RDFT;
142 ast->codec->channels = flags & BINK_AUD_STEREO ? 2 : 1;
143 ast->codec->extradata = av_mallocz(1 + FF_INPUT_BUFFER_PADDING_SIZE);
144 ast->codec->extradata_size = 1;
145 ast->codec->extradata[0] = vst->codec->codec_tag == MKTAG('B','I','K','b');
148 for (i = 0; i < bink->num_audio_tracks; i++)
149 s->streams[i + 1]->id = avio_rl32(pb);
152 /* frame index table */
153 next_pos = avio_rl32(pb);
154 for (i = 0; i < vst->duration; i++) {
156 if (i == vst->duration - 1) {
157 next_pos = bink->file_size;
160 next_pos = avio_rl32(pb);
166 if (next_pos <= pos) {
167 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
170 av_add_index_entry(vst, pos, i, next_pos - pos, 0,
171 keyframe ? AVINDEX_KEYFRAME : 0);
176 bink->current_track = -1;
180 static int read_packet(AVFormatContext *s, AVPacket *pkt)
182 BinkDemuxContext *bink = s->priv_data;
183 AVIOContext *pb = s->pb;
186 if (bink->current_track < 0) {
188 AVStream *st = s->streams[0]; // stream 0 is video stream with index
190 if (bink->video_pts >= st->duration)
193 index_entry = av_index_search_timestamp(st, bink->video_pts,
195 if (index_entry < 0) {
196 av_log(s, AV_LOG_ERROR,
197 "could not find index entry for frame %"PRId64"\n",
202 bink->remain_packet_size = st->index_entries[index_entry].size;
203 bink->current_track = 0;
206 while (bink->current_track < bink->num_audio_tracks) {
207 uint32_t audio_size = avio_rl32(pb);
208 if (audio_size > bink->remain_packet_size - 4) {
209 av_log(s, AV_LOG_ERROR,
210 "frame %"PRId64": audio size in header (%u) > size of packet left (%u)\n",
211 bink->video_pts, audio_size, bink->remain_packet_size);
214 bink->remain_packet_size -= 4 + audio_size;
215 bink->current_track++;
216 if (audio_size >= 4) {
217 /* get one audio packet per track */
218 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
220 pkt->stream_index = bink->current_track;
221 pkt->pts = bink->audio_pts[bink->current_track - 1];
223 /* Each audio packet reports the number of decompressed samples
224 (in bytes). We use this value to calcuate the audio PTS */
226 bink->audio_pts[bink->current_track -1] +=
227 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
230 avio_skip(pb, audio_size);
234 /* get video packet */
235 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
237 pkt->stream_index = 0;
238 pkt->pts = bink->video_pts++;
239 pkt->flags |= AV_PKT_FLAG_KEY;
241 /* -1 instructs the next call to read_packet() to read the next frame */
242 bink->current_track = -1;
247 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
249 BinkDemuxContext *bink = s->priv_data;
250 AVStream *vst = s->streams[0];
252 if (!s->pb->seekable)
255 /* seek to the first frame */
256 avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET);
258 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
259 bink->current_track = -1;
263 AVInputFormat ff_bink_demuxer = {
265 NULL_IF_CONFIG_SMALL("Bink"),
266 sizeof(BinkDemuxContext),