Bink demuxer
[libav.git] / libavformat / bink.c
1 /*
2 * Bink demuxer
3 * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org)
4 * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu)
5 *
6 * This file is part of FFmpeg.
7 *
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.
12 *
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.
17 *
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
21 */
22
23 /**
24 * @file libavformat/bink.c
25 * Bink demuxer
26 *
27 * Technical details here:
28 * http://wiki.multimedia.cx/index.php?title=Bink_Container
29 */
30
31 #include "libavutil/intreadwrite.h"
32 #include "avformat.h"
33
34 enum BinkAudFlags {
35 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
36 BINK_AUD_STEREO = 0x2000,
37 BINK_AUD_USEDCT = 0x1000,
38 };
39
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
44
45 typedef struct {
46 uint32_t file_size;
47 uint32_t total_frames;
48
49 uint32_t num_audio_tracks;
50 int current_track; ///< audio track to return in next packet
51 int64_t video_pts;
52 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
53
54 uint32_t remain_packet_size;
55 } BinkDemuxContext;
56
57 static int probe(AVProbeData *p)
58 {
59 const uint8_t *b = p->buf;
60
61 if ( b[0] == 'B' && b[1] == 'I' && b[2] == 'K' &&
62 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i') &&
63 AV_RL32(b+8) > 0 && // num_frames
64 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH &&
65 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT &&
66 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den
67 return AVPROBE_SCORE_MAX;
68 return 0;
69 }
70
71 static int read_header(AVFormatContext *s, AVFormatParameters *ap)
72 {
73 BinkDemuxContext *bink = s->priv_data;
74 ByteIOContext *pb = s->pb;
75 uint32_t fps_num, fps_den;
76 AVStream *vst, *ast;
77 unsigned int i;
78 uint32_t pos, prev_pos;
79 uint16_t flags;
80 int keyframe;
81
82 vst = av_new_stream(s, 0);
83 if (!vst)
84 return AVERROR(ENOMEM);
85
86 vst->codec->codec_tag = get_le32(pb);
87
88 bink->file_size = get_le32(pb) + 8;
89 bink->total_frames = get_le32(pb);
90
91 if (bink->total_frames > 1000000) {
92 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
93 return AVERROR(EIO);
94 }
95
96 if (get_le32(pb) > bink->file_size) {
97 av_log(s, AV_LOG_ERROR,
98 "invalid header: largest frame size greater than file size\n");
99 return AVERROR(EIO);
100 }
101
102 url_fskip(pb, 4);
103
104 vst->codec->width = get_le32(pb);
105 vst->codec->height = get_le32(pb);
106
107 fps_num = get_le32(pb);
108 fps_den = get_le32(pb);
109 if (fps_num == 0 || fps_den == 0) {
110 av_log(s, AV_LOG_ERROR, "invalid header: invalid fps (%d/%d)\n", fps_num, fps_den);
111 return AVERROR(EIO);
112 }
113 av_set_pts_info(vst, 64, fps_den, fps_num);
114
115 url_fskip(pb, 4);
116
117 vst->codec->codec_type = CODEC_TYPE_VIDEO;
118 vst->codec->codec_id = 0; /* FIXME: CODEC_ID_BINKVIDEO */
119 bink->num_audio_tracks = get_le32(pb);
120
121 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) {
122 av_log(s, AV_LOG_ERROR,
123 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%d)\n",
124 bink->num_audio_tracks);
125 return AVERROR(EIO);
126 }
127
128 if (bink->num_audio_tracks) {
129 url_fskip(pb, 4 * bink->num_audio_tracks);
130
131 for (i = 0; i < bink->num_audio_tracks; i++) {
132 ast = av_new_stream(s, 1);
133 if (!ast)
134 return AVERROR(ENOMEM);
135 ast->codec->codec_type = CODEC_TYPE_AUDIO;
136 ast->codec->codec_tag = 0;
137 ast->codec->sample_rate = get_le16(pb);
138 av_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
139 flags = get_le16(pb);
140 ast->codec->codec_id = flags & BINK_AUD_USEDCT ?
141 CODEC_ID_BINKAUDIO_DCT : CODEC_ID_BINKAUDIO_RDFT;
142 ast->codec->channels = flags & BINK_AUD_STEREO ? 2 : 1;
143 }
144
145 url_fskip(pb, 4 * bink->num_audio_tracks);
146 }
147
148 /* frame index table */
149 pos = get_le32(pb) & ~1;
150 for (i = 0; i < bink->total_frames; i++) {
151 prev_pos = pos;
152 if (i == bink->total_frames - 1) {
153 pos = bink->file_size;
154 keyframe = 0;
155 } else {
156 pos = get_le32(pb);
157 keyframe = pos & 1;
158 pos &= ~1;
159 }
160 if (pos <= prev_pos) {
161 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
162 return AVERROR(EIO);
163 }
164 av_add_index_entry(vst, pos, i, pos - prev_pos, 0,
165 keyframe ? AVINDEX_KEYFRAME : 0);
166 }
167
168 url_fskip(pb, 4);
169
170 bink->current_track = -1;
171 return 0;
172 }
173
174 static int read_packet(AVFormatContext *s, AVPacket *pkt)
175 {
176 BinkDemuxContext *bink = s->priv_data;
177 ByteIOContext *pb = s->pb;
178 int ret;
179
180 if (bink->current_track < 0) {
181 int index_entry;
182 AVStream *st = s->streams[0]; // stream 0 is video stream with index
183
184 if (bink->video_pts >= bink->total_frames)
185 return AVERROR(EIO);
186
187 index_entry = av_index_search_timestamp(st, bink->video_pts,
188 AVSEEK_FLAG_ANY);
189 if (index_entry < 0) {
190 av_log(s, AV_LOG_ERROR,
191 "could not find index entry for frame %"PRId64"\n",
192 bink->video_pts);
193 return AVERROR(EIO);
194 }
195
196 bink->remain_packet_size = st->index_entries[index_entry].size;
197 bink->current_track = 0;
198 }
199
200 if (bink->current_track < bink->num_audio_tracks) {
201 uint32_t audio_size = get_le32(pb);
202 if (audio_size > bink->remain_packet_size - 4) {
203 av_log(s, AV_LOG_ERROR,
204 "frame %"PRId64": audio size in header (%u) > size of packet left (%u)\n",
205 bink->video_pts, audio_size, bink->remain_packet_size);
206 return AVERROR(EIO);
207 }
208 bink->remain_packet_size -= 4 + audio_size;
209 bink->current_track++;
210 if (audio_size > 0) {
211 /* Each audio packet reports the number of decompressed samples
212 (in bytes). We use this value to calcuate the audio PTS */
213 int reported_size = get_le32(pb) / (2 * s->streams[bink->current_track]->codec->channels);
214 url_fseek(pb, -4, SEEK_CUR);
215
216 /* get one audio packet per track */
217 if ((ret = av_get_packet(pb, pkt, audio_size))
218 != audio_size)
219 return ret;
220 pkt->stream_index = bink->current_track;
221 pkt->pts = bink->audio_pts[bink->current_track - 1] += reported_size;
222 return 0;
223 }
224 }
225
226 /* get video packet */
227 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size))
228 != bink->remain_packet_size)
229 return ret;
230 pkt->stream_index = 0;
231 pkt->pts = bink->video_pts++;
232 pkt->flags |= PKT_FLAG_KEY;
233
234 /* -1 instructs the next call to read_packet() to read the next frame */
235 bink->current_track = -1;
236
237 return 0;
238 }
239
240 AVInputFormat bink_demuxer = {
241 "bink",
242 NULL_IF_CONFIG_SMALL("Bink"),
243 sizeof(BinkDemuxContext),
244 probe,
245 read_header,
246 read_packet,
247 };