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/channel_layout.h"
32 #include "libavutil/intreadwrite.h"
37 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
38 BINK_AUD_STEREO = 0x2000,
39 BINK_AUD_USEDCT = 0x1000,
42 #define BINK_EXTRADATA_SIZE 1
43 #define BINK_MAX_AUDIO_TRACKS 256
44 #define BINK_MAX_WIDTH 7680
45 #define BINK_MAX_HEIGHT 4800
50 uint32_t num_audio_tracks;
51 int current_track; ///< audio track to return in next packet
53 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
55 uint32_t remain_packet_size;
58 static int probe(AVProbeData *p)
60 const uint8_t *b = p->buf;
62 if ( b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
63 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i') &&
64 AV_RL32(b+8) > 0 && // num_frames
65 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
66 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
67 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
68 return AVPROBE_SCORE_MAX;
72 static int read_header(AVFormatContext *s)
74 BinkDemuxContext *bink = s->priv_data;
75 AVIOContext *pb = s->pb;
76 uint32_t fps_num, fps_den;
79 uint32_t pos, next_pos;
83 vst = avformat_new_stream(s, NULL);
85 return AVERROR(ENOMEM);
87 vst->codec->codec_tag = avio_rl32(pb);
89 bink->file_size = avio_rl32(pb) + 8;
90 vst->duration = avio_rl32(pb);
92 if (vst->duration > 1000000) {
93 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
97 if (avio_rl32(pb) > bink->file_size) {
98 av_log(s, AV_LOG_ERROR,
99 "invalid header: largest frame size greater than file size\n");
105 vst->codec->width = avio_rl32(pb);
106 vst->codec->height = avio_rl32(pb);
108 fps_num = avio_rl32(pb);
109 fps_den = avio_rl32(pb);
110 if (fps_num == 0 || fps_den == 0) {
111 av_log(s, AV_LOG_ERROR, "invalid header: invalid fps (%d/%d)\n", fps_num, fps_den);
114 avpriv_set_pts_info(vst, 64, fps_den, fps_num);
115 vst->avg_frame_rate = av_inv_q(vst->time_base);
117 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
118 vst->codec->codec_id = AV_CODEC_ID_BINKVIDEO;
119 vst->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE);
120 if (!vst->codec->extradata)
121 return AVERROR(ENOMEM);
122 vst->codec->extradata_size = 4;
123 avio_read(pb, vst->codec->extradata, 4);
125 bink->num_audio_tracks = avio_rl32(pb);
127 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
128 av_log(s, AV_LOG_ERROR,
129 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%d)\n",
130 bink->num_audio_tracks);
134 if (bink->num_audio_tracks) {
135 avio_skip(pb, 4 * bink->num_audio_tracks);
137 for (i = 0; i < bink->num_audio_tracks; i++) {
138 ast = avformat_new_stream(s, NULL);
140 return AVERROR(ENOMEM);
141 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
142 ast->codec->codec_tag = 0;
143 ast->codec->sample_rate = avio_rl16(pb);
144 avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
145 flags = avio_rl16(pb);
146 ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
147 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
148 if (flags & BINK_AUD_STEREO) {
149 ast->codec->channels = 2;
150 ast->codec->channel_layout = AV_CH_LAYOUT_STEREO;
152 ast->codec->channels = 1;
153 ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
155 ast->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE);
156 if (!ast->codec->extradata)
157 return AVERROR(ENOMEM);
158 ast->codec->extradata_size = 4;
159 AV_WL32(ast->codec->extradata, vst->codec->codec_tag);
162 for (i = 0; i < bink->num_audio_tracks; i++)
163 s->streams[i + 1]->id = avio_rl32(pb);
166 /* frame index table */
167 next_pos = avio_rl32(pb);
168 for (i = 0; i < vst->duration; i++) {
170 if (i == vst->duration - 1) {
171 next_pos = bink->file_size;
174 next_pos = avio_rl32(pb);
180 if (next_pos <= pos) {
181 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
184 av_add_index_entry(vst, pos, i, next_pos - pos, 0,
185 keyframe ? AVINDEX_KEYFRAME : 0);
190 bink->current_track = -1;
194 static int read_packet(AVFormatContext *s, AVPacket *pkt)
196 BinkDemuxContext *bink = s->priv_data;
197 AVIOContext *pb = s->pb;
200 if (bink->current_track < 0) {
202 AVStream *st = s->streams[0]; // stream 0 is video stream with index
204 if (bink->video_pts >= st->duration)
207 index_entry = av_index_search_timestamp(st, bink->video_pts,
209 if (index_entry < 0) {
210 av_log(s, AV_LOG_ERROR,
211 "could not find index entry for frame %"PRId64"\n",
216 bink->remain_packet_size = st->index_entries[index_entry].size;
217 bink->current_track = 0;
220 while (bink->current_track < bink->num_audio_tracks) {
221 uint32_t audio_size = avio_rl32(pb);
222 if (audio_size > bink->remain_packet_size - 4) {
223 av_log(s, AV_LOG_ERROR,
224 "frame %"PRId64": audio size in header (%u) > size of packet left (%u)\n",
225 bink->video_pts, audio_size, bink->remain_packet_size);
228 bink->remain_packet_size -= 4 + audio_size;
229 bink->current_track++;
230 if (audio_size >= 4) {
231 /* get one audio packet per track */
232 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
234 pkt->stream_index = bink->current_track;
235 pkt->pts = bink->audio_pts[bink->current_track - 1];
237 /* Each audio packet reports the number of decompressed samples
238 (in bytes). We use this value to calcuate the audio PTS */
240 bink->audio_pts[bink->current_track -1] +=
241 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
244 avio_skip(pb, audio_size);
248 /* get video packet */
249 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
251 pkt->stream_index = 0;
252 pkt->pts = bink->video_pts++;
253 pkt->flags |= AV_PKT_FLAG_KEY;
255 /* -1 instructs the next call to read_packet() to read the next frame */
256 bink->current_track = -1;
261 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
263 BinkDemuxContext *bink = s->priv_data;
264 AVStream *vst = s->streams[0];
266 if (!s->pb->seekable)
269 /* seek to the first frame */
270 if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0)
274 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
275 bink->current_track = -1;
279 AVInputFormat ff_bink_demuxer = {
281 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
282 .priv_data_size = sizeof(BinkDemuxContext),
284 .read_header = read_header,
285 .read_packet = read_packet,
286 .read_seek = read_seek,