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 (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
65 (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g'))) &&
66 AV_RL32(b+8) > 0 && // num_frames
67 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
68 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
69 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
70 return AVPROBE_SCORE_MAX;
74 static int read_header(AVFormatContext *s)
76 BinkDemuxContext *bink = s->priv_data;
77 AVIOContext *pb = s->pb;
78 uint32_t fps_num, fps_den;
81 uint32_t pos, next_pos;
85 vst = avformat_new_stream(s, NULL);
87 return AVERROR(ENOMEM);
89 vst->codec->codec_tag = avio_rl32(pb);
91 bink->file_size = avio_rl32(pb) + 8;
92 vst->duration = avio_rl32(pb);
94 if (vst->duration > 1000000) {
95 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
99 if (avio_rl32(pb) > bink->file_size) {
100 av_log(s, AV_LOG_ERROR,
101 "invalid header: largest frame size greater than file size\n");
107 vst->codec->width = avio_rl32(pb);
108 vst->codec->height = avio_rl32(pb);
110 fps_num = avio_rl32(pb);
111 fps_den = avio_rl32(pb);
112 if (fps_num == 0 || fps_den == 0) {
113 av_log(s, AV_LOG_ERROR, "invalid header: invalid fps (%d/%d)\n", fps_num, fps_den);
116 avpriv_set_pts_info(vst, 64, fps_den, fps_num);
117 vst->avg_frame_rate = av_inv_q(vst->time_base);
119 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
120 vst->codec->codec_id = AV_CODEC_ID_BINKVIDEO;
122 if ((vst->codec->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
123 av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
124 vst->codec->codec_id = AV_CODEC_ID_NONE;
127 if (ff_get_extradata(vst->codec, pb, 4) < 0)
128 return AVERROR(ENOMEM);
130 bink->num_audio_tracks = avio_rl32(pb);
132 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
133 av_log(s, AV_LOG_ERROR,
134 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%d)\n",
135 bink->num_audio_tracks);
139 if (bink->num_audio_tracks) {
140 avio_skip(pb, 4 * bink->num_audio_tracks);
142 for (i = 0; i < bink->num_audio_tracks; i++) {
143 ast = avformat_new_stream(s, NULL);
145 return AVERROR(ENOMEM);
146 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
147 ast->codec->codec_tag = 0;
148 ast->codec->sample_rate = avio_rl16(pb);
149 avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
150 flags = avio_rl16(pb);
151 ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
152 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
153 if (flags & BINK_AUD_STEREO) {
154 ast->codec->channels = 2;
155 ast->codec->channel_layout = AV_CH_LAYOUT_STEREO;
157 ast->codec->channels = 1;
158 ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
160 if (ff_alloc_extradata(ast->codec, 4))
161 return AVERROR(ENOMEM);
162 AV_WL32(ast->codec->extradata, vst->codec->codec_tag);
165 for (i = 0; i < bink->num_audio_tracks; i++)
166 s->streams[i + 1]->id = avio_rl32(pb);
169 /* frame index table */
170 next_pos = avio_rl32(pb);
171 for (i = 0; i < vst->duration; i++) {
173 if (i == vst->duration - 1) {
174 next_pos = bink->file_size;
177 next_pos = avio_rl32(pb);
183 if (next_pos <= pos) {
184 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
187 av_add_index_entry(vst, pos, i, next_pos - pos, 0,
188 keyframe ? AVINDEX_KEYFRAME : 0);
191 avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
193 bink->current_track = -1;
197 static int read_packet(AVFormatContext *s, AVPacket *pkt)
199 BinkDemuxContext *bink = s->priv_data;
200 AVIOContext *pb = s->pb;
203 if (bink->current_track < 0) {
205 AVStream *st = s->streams[0]; // stream 0 is video stream with index
207 if (bink->video_pts >= st->duration)
210 index_entry = av_index_search_timestamp(st, bink->video_pts,
212 if (index_entry < 0) {
213 av_log(s, AV_LOG_ERROR,
214 "could not find index entry for frame %"PRId64"\n",
219 bink->remain_packet_size = st->index_entries[index_entry].size;
220 bink->current_track = 0;
223 while (bink->current_track < bink->num_audio_tracks) {
224 uint32_t audio_size = avio_rl32(pb);
225 if (audio_size > bink->remain_packet_size - 4) {
226 av_log(s, AV_LOG_ERROR,
227 "frame %"PRId64": audio size in header (%u) > size of packet left (%u)\n",
228 bink->video_pts, audio_size, bink->remain_packet_size);
231 bink->remain_packet_size -= 4 + audio_size;
232 bink->current_track++;
233 if (audio_size >= 4) {
234 /* get one audio packet per track */
235 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
237 pkt->stream_index = bink->current_track;
238 pkt->pts = bink->audio_pts[bink->current_track - 1];
240 /* Each audio packet reports the number of decompressed samples
241 (in bytes). We use this value to calcuate the audio PTS */
243 bink->audio_pts[bink->current_track -1] +=
244 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
247 avio_skip(pb, audio_size);
251 /* get video packet */
252 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
254 pkt->stream_index = 0;
255 pkt->pts = bink->video_pts++;
256 pkt->flags |= AV_PKT_FLAG_KEY;
258 /* -1 instructs the next call to read_packet() to read the next frame */
259 bink->current_track = -1;
264 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
266 BinkDemuxContext *bink = s->priv_data;
267 AVStream *vst = s->streams[0];
269 if (!s->pb->seekable)
272 /* seek to the first frame */
273 if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0)
277 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
278 bink->current_track = -1;
282 AVInputFormat ff_bink_demuxer = {
284 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
285 .priv_data_size = sizeof(BinkDemuxContext),
287 .read_header = read_header,
288 .read_packet = read_packet,
289 .read_seek = read_seek,
290 .flags = AVFMT_SHOW_IDS,