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
48 #define SMUSH_BLOCK_SIZE 512
50 typedef struct BinkDemuxContext {
53 uint32_t num_audio_tracks;
54 int current_track; ///< audio track to return in next packet
56 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
58 uint32_t remain_packet_size;
63 static int probe(const AVProbeData *p)
65 const uint8_t *b = p->buf;
66 int smush = AV_RN32(p->buf) == AV_RN32("SMUS");
69 if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */
70 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' ||
72 (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */
73 (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' ||
74 b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) &&
75 AV_RL32(b+8) > 0 && // num_frames
76 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
77 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
78 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
79 return AVPROBE_SCORE_MAX;
80 b += SMUSH_BLOCK_SIZE;
81 } while (smush && b < p->buf + p->buf_size - 32);
85 static int read_header(AVFormatContext *s)
87 BinkDemuxContext *bink = s->priv_data;
88 AVIOContext *pb = s->pb;
89 uint32_t fps_num, fps_den;
92 uint32_t pos, next_pos;
94 int next_keyframe = 1;
100 vst = avformat_new_stream(s, NULL);
102 return AVERROR(ENOMEM);
104 vst->codecpar->codec_tag = avio_rl32(pb);
105 if (vst->codecpar->codec_tag == AV_RL32("SMUS")) {
107 bink->smush_size += SMUSH_BLOCK_SIZE;
108 avio_skip(pb, SMUSH_BLOCK_SIZE - 4);
109 vst->codecpar->codec_tag = avio_rl32(pb);
110 } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK"));
112 av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n");
113 return AVERROR_INVALIDDATA;
117 bink->file_size = avio_rl32(pb) + 8;
118 vst->duration = avio_rl32(pb);
120 if (vst->duration > 1000000) {
121 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
125 if (avio_rl32(pb) > bink->file_size) {
126 av_log(s, AV_LOG_ERROR,
127 "invalid header: largest frame size greater than file size\n");
133 vst->codecpar->width = avio_rl32(pb);
134 vst->codecpar->height = avio_rl32(pb);
136 fps_num = avio_rl32(pb);
137 fps_den = avio_rl32(pb);
138 if (fps_num == 0 || fps_den == 0) {
139 av_log(s, AV_LOG_ERROR,
140 "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n",
144 avpriv_set_pts_info(vst, 64, fps_den, fps_num);
145 vst->avg_frame_rate = av_inv_q(vst->time_base);
147 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
148 vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO;
150 if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
151 av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
152 vst->codecpar->codec_id = AV_CODEC_ID_NONE;
155 if ((ret = ff_get_extradata(s, vst->codecpar, pb, 4)) < 0)
158 bink->num_audio_tracks = avio_rl32(pb);
160 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
161 av_log(s, AV_LOG_ERROR,
162 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n",
163 bink->num_audio_tracks);
167 signature = (vst->codecpar->codec_tag & 0xFFFFFF);
168 revision = ((vst->codecpar->codec_tag >> 24) % 0xFF);
170 if ((signature == AV_RL32("BIK") && (revision == 'k')) ||
171 (signature == AV_RL32("KB2") && (revision == 'i' || revision == 'j' || revision == 'k')))
172 avio_skip(pb, 4); /* unknown new field */
174 if (bink->num_audio_tracks) {
175 avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */
177 for (i = 0; i < bink->num_audio_tracks; i++) {
178 ast = avformat_new_stream(s, NULL);
180 return AVERROR(ENOMEM);
181 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
182 ast->codecpar->codec_tag = 0;
183 ast->codecpar->sample_rate = avio_rl16(pb);
184 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
185 flags = avio_rl16(pb);
186 ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ?
187 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT;
188 if (flags & BINK_AUD_STEREO) {
189 ast->codecpar->channels = 2;
190 ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
192 ast->codecpar->channels = 1;
193 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
195 if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0)
197 AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag);
200 for (i = 0; i < bink->num_audio_tracks; i++)
201 s->streams[i + 1]->id = avio_rl32(pb);
204 /* frame index table */
205 next_pos = avio_rl32(pb);
206 for (i = 0; i < vst->duration; i++) {
208 keyframe = next_keyframe;
209 if (i == vst->duration - 1) {
210 next_pos = bink->file_size;
213 next_pos = avio_rl32(pb);
214 next_keyframe = next_pos & 1;
219 if (next_pos <= pos) {
220 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
223 if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
224 keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
228 if (vst->internal->index_entries)
229 avio_seek(pb, vst->internal->index_entries[0].pos + bink->smush_size, SEEK_SET);
233 bink->current_track = -1;
237 static int read_packet(AVFormatContext *s, AVPacket *pkt)
239 BinkDemuxContext *bink = s->priv_data;
240 AVIOContext *pb = s->pb;
243 if (bink->current_track < 0) {
245 AVStream *st = s->streams[0]; // stream 0 is video stream with index
247 if (bink->video_pts >= st->duration)
250 index_entry = av_index_search_timestamp(st, bink->video_pts,
252 if (index_entry < 0) {
253 av_log(s, AV_LOG_ERROR,
254 "could not find index entry for frame %"PRId64"\n",
259 bink->remain_packet_size = st->internal->index_entries[index_entry].size;
260 bink->flags = st->internal->index_entries[index_entry].flags;
261 bink->current_track = 0;
264 while (bink->current_track < bink->num_audio_tracks) {
265 uint32_t audio_size = avio_rl32(pb);
266 if (audio_size > bink->remain_packet_size - 4) {
267 av_log(s, AV_LOG_ERROR,
268 "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
269 bink->video_pts, audio_size, bink->remain_packet_size);
272 bink->remain_packet_size -= 4 + audio_size;
273 bink->current_track++;
274 if (audio_size >= 4) {
275 /* get one audio packet per track */
276 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
278 pkt->stream_index = bink->current_track;
279 pkt->pts = bink->audio_pts[bink->current_track - 1];
281 /* Each audio packet reports the number of decompressed samples
282 (in bytes). We use this value to calculate the audio PTS */
284 bink->audio_pts[bink->current_track -1] +=
285 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels);
288 avio_skip(pb, audio_size);
292 /* get video packet */
293 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
295 pkt->stream_index = 0;
296 pkt->pts = bink->video_pts++;
297 if (bink->flags & AVINDEX_KEYFRAME)
298 pkt->flags |= AV_PKT_FLAG_KEY;
300 /* -1 instructs the next call to read_packet() to read the next frame */
301 bink->current_track = -1;
306 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
308 BinkDemuxContext *bink = s->priv_data;
309 AVStream *vst = s->streams[0];
312 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
315 /* seek to the first frame */
316 ret = avio_seek(s->pb, vst->internal->index_entries[0].pos + bink->smush_size, SEEK_SET);
321 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
322 bink->current_track = -1;
326 AVInputFormat ff_bink_demuxer = {
328 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
329 .priv_data_size = sizeof(BinkDemuxContext),
331 .read_header = read_header,
332 .read_packet = read_packet,
333 .read_seek = read_seek,
334 .flags = AVFMT_SHOW_IDS,