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
33 #include "libavutil/channel_layout.h"
34 #include "libavutil/intreadwrite.h"
39 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
40 BINK_AUD_STEREO = 0x2000,
41 BINK_AUD_USEDCT = 0x1000,
44 #define BINK_EXTRADATA_SIZE 1
45 #define BINK_MAX_AUDIO_TRACKS 256
46 #define BINK_MAX_WIDTH 7680
47 #define BINK_MAX_HEIGHT 4800
49 typedef struct BinkDemuxContext {
52 uint32_t num_audio_tracks;
53 int current_track; ///< audio track to return in next packet
55 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
57 uint32_t remain_packet_size;
60 static int probe(AVProbeData *p)
62 const uint8_t *b = p->buf;
64 if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
65 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i')) ||
66 (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
67 (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g'))) &&
68 AV_RL32(b+8) > 0 && // num_frames
69 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
70 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
71 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
72 return AVPROBE_SCORE_MAX;
76 static int read_header(AVFormatContext *s)
78 BinkDemuxContext *bink = s->priv_data;
79 AVIOContext *pb = s->pb;
80 uint32_t fps_num, fps_den;
83 uint32_t pos, next_pos;
88 vst = avformat_new_stream(s, NULL);
90 return AVERROR(ENOMEM);
92 vst->codecpar->codec_tag = avio_rl32(pb);
94 bink->file_size = avio_rl32(pb) + 8;
95 vst->duration = avio_rl32(pb);
97 if (vst->duration > 1000000) {
98 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
102 if (avio_rl32(pb) > bink->file_size) {
103 av_log(s, AV_LOG_ERROR,
104 "invalid header: largest frame size greater than file size\n");
110 vst->codecpar->width = avio_rl32(pb);
111 vst->codecpar->height = avio_rl32(pb);
113 fps_num = avio_rl32(pb);
114 fps_den = avio_rl32(pb);
115 if (fps_num == 0 || fps_den == 0) {
116 av_log(s, AV_LOG_ERROR,
117 "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
121 avpriv_set_pts_info(vst, 64, fps_den, fps_num);
122 vst->avg_frame_rate = av_inv_q(vst->time_base);
124 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
125 vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO;
127 if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
128 av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
129 vst->codecpar->codec_id = AV_CODEC_ID_NONE;
132 if (ff_get_extradata(vst->codecpar, pb, 4) < 0)
133 return AVERROR(ENOMEM);
135 bink->num_audio_tracks = avio_rl32(pb);
137 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
138 av_log(s, AV_LOG_ERROR,
139 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
140 bink->num_audio_tracks);
144 if (bink->num_audio_tracks) {
145 avio_skip(pb, 4 * bink->num_audio_tracks);
147 for (i = 0; i < bink->num_audio_tracks; i++) {
148 ast = avformat_new_stream(s, NULL);
150 return AVERROR(ENOMEM);
151 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
152 ast->codecpar->codec_tag = 0;
153 ast->codecpar->sample_rate = avio_rl16(pb);
154 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
155 flags = avio_rl16(pb);
156 ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
157 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
158 if (flags & BINK_AUD_STEREO) {
159 ast->codecpar->channels = 2;
160 ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
162 ast->codecpar->channels = 1;
163 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
165 if (ff_alloc_extradata(ast->codecpar, 4))
166 return AVERROR(ENOMEM);
167 AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
170 for (i = 0; i < bink->num_audio_tracks; i++)
171 s->streams[i + 1]->id = avio_rl32(pb);
174 /* frame index table */
175 next_pos = avio_rl32(pb);
176 for (i = 0; i < vst->duration; i++) {
178 if (i == vst->duration - 1) {
179 next_pos = bink->file_size;
182 next_pos = avio_rl32(pb);
188 if (next_pos <= pos) {
189 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
192 if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
193 keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
197 if (vst->index_entries)
198 avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
202 bink->current_track = -1;
206 static int read_packet(AVFormatContext *s, AVPacket *pkt)
208 BinkDemuxContext *bink = s->priv_data;
209 AVIOContext *pb = s->pb;
212 if (bink->current_track < 0) {
214 AVStream *st = s->streams[0]; // stream 0 is video stream with index
216 if (bink->video_pts >= st->duration)
219 index_entry = av_index_search_timestamp(st, bink->video_pts,
221 if (index_entry < 0) {
222 av_log(s, AV_LOG_ERROR,
223 "could not find index entry for frame %"PRId64"\n",
228 bink->remain_packet_size = st->index_entries[index_entry].size;
229 bink->current_track = 0;
232 while (bink->current_track < bink->num_audio_tracks) {
233 uint32_t audio_size = avio_rl32(pb);
234 if (audio_size > bink->remain_packet_size - 4) {
235 av_log(s, AV_LOG_ERROR,
236 "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
237 bink->video_pts, audio_size, bink->remain_packet_size);
240 bink->remain_packet_size -= 4 + audio_size;
241 bink->current_track++;
242 if (audio_size >= 4) {
243 /* get one audio packet per track */
244 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
246 pkt->stream_index = bink->current_track;
247 pkt->pts = bink->audio_pts[bink->current_track - 1];
249 /* Each audio packet reports the number of decompressed samples
250 (in bytes). We use this value to calcuate the audio PTS */
252 bink->audio_pts[bink->current_track -1] +=
253 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels);
256 avio_skip(pb, audio_size);
260 /* get video packet */
261 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
263 pkt->stream_index = 0;
264 pkt->pts = bink->video_pts++;
265 pkt->flags |= AV_PKT_FLAG_KEY;
267 /* -1 instructs the next call to read_packet() to read the next frame */
268 bink->current_track = -1;
273 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
275 BinkDemuxContext *bink = s->priv_data;
276 AVStream *vst = s->streams[0];
278 if (!s->pb->seekable)
281 /* seek to the first frame */
282 if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0)
286 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
287 bink->current_track = -1;
291 AVInputFormat ff_bink_demuxer = {
293 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
294 .priv_data_size = sizeof(BinkDemuxContext),
296 .read_header = read_header,
297 .read_packet = read_packet,
298 .read_seek = read_seek,
299 .flags = AVFMT_SHOW_IDS,