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->codec_tag = 0;
138 ast->codec->sample_rate = avio_rl16(pb);
139 av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
140 flags = avio_rl16(pb);
141 ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
142 CODEC_ID_BINKAUDIO_DCT : CODEC_ID_BINKAUDIO_RDFT;
143 ast->codec->channels = flags & BINK_AUD_STEREO ? 2 : 1;
144 ast->codec->extradata = av_mallocz(4 + FF_INPUT_BUFFER_PADDING_SIZE);
145 if (!ast->codec->extradata)
146 return AVERROR(ENOMEM);
147 ast->codec->extradata_size = 4;
148 AV_WL32(ast->codec->extradata, vst->codec->codec_tag);
151 for (i = 0; i < bink->num_audio_tracks; i++)
152 s->streams[i + 1]->id = avio_rl32(pb);
155 /* frame index table */
156 next_pos = avio_rl32(pb);
157 for (i = 0; i < vst->duration; i++) {
159 if (i == vst->duration - 1) {
160 next_pos = bink->file_size;
163 next_pos = avio_rl32(pb);
169 if (next_pos <= pos) {
170 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
173 av_add_index_entry(vst, pos, i, next_pos - pos, 0,
174 keyframe ? AVINDEX_KEYFRAME : 0);
179 bink->current_track = -1;
183 static int read_packet(AVFormatContext *s, AVPacket *pkt)
185 BinkDemuxContext *bink = s->priv_data;
186 AVIOContext *pb = s->pb;
189 if (bink->current_track < 0) {
191 AVStream *st = s->streams[0]; // stream 0 is video stream with index
193 if (bink->video_pts >= st->duration)
196 index_entry = av_index_search_timestamp(st, bink->video_pts,
198 if (index_entry < 0) {
199 av_log(s, AV_LOG_ERROR,
200 "could not find index entry for frame %"PRId64"\n",
205 bink->remain_packet_size = st->index_entries[index_entry].size;
206 bink->current_track = 0;
209 while (bink->current_track < bink->num_audio_tracks) {
210 uint32_t audio_size = avio_rl32(pb);
211 if (audio_size > bink->remain_packet_size - 4) {
212 av_log(s, AV_LOG_ERROR,
213 "frame %"PRId64": audio size in header (%u) > size of packet left (%u)\n",
214 bink->video_pts, audio_size, bink->remain_packet_size);
217 bink->remain_packet_size -= 4 + audio_size;
218 bink->current_track++;
219 if (audio_size >= 4) {
220 /* get one audio packet per track */
221 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
223 pkt->stream_index = bink->current_track;
224 pkt->pts = bink->audio_pts[bink->current_track - 1];
226 /* Each audio packet reports the number of decompressed samples
227 (in bytes). We use this value to calcuate the audio PTS */
229 bink->audio_pts[bink->current_track -1] +=
230 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
233 avio_skip(pb, audio_size);
237 /* get video packet */
238 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
240 pkt->stream_index = 0;
241 pkt->pts = bink->video_pts++;
242 pkt->flags |= AV_PKT_FLAG_KEY;
244 /* -1 instructs the next call to read_packet() to read the next frame */
245 bink->current_track = -1;
250 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
252 BinkDemuxContext *bink = s->priv_data;
253 AVStream *vst = s->streams[0];
255 if (!s->pb->seekable)
258 /* seek to the first frame */
259 avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET);
261 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
262 bink->current_track = -1;
266 AVInputFormat ff_bink_demuxer = {
268 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
269 .priv_data_size = sizeof(BinkDemuxContext),
271 .read_header = read_header,
272 .read_packet = read_packet,
273 .read_seek = read_seek,