Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / bink.c
... / ...
CommitLineData
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
25 * Bink demuxer
26 *
27 * Technical details here:
28 * http://wiki.multimedia.cx/index.php?title=Bink_Container
29 */
30
31#include <inttypes.h>
32
33#include "libavutil/channel_layout.h"
34#include "libavutil/intreadwrite.h"
35#include "avformat.h"
36#include "internal.h"
37
38enum BinkAudFlags {
39 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output
40 BINK_AUD_STEREO = 0x2000,
41 BINK_AUD_USEDCT = 0x1000,
42};
43
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
49typedef struct {
50 uint32_t file_size;
51
52 uint32_t num_audio_tracks;
53 int current_track; ///< audio track to return in next packet
54 int64_t video_pts;
55 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS];
56
57 uint32_t remain_packet_size;
58} BinkDemuxContext;
59
60static int probe(AVProbeData *p)
61{
62 const uint8_t *b = p->buf;
63
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;
73 return 0;
74}
75
76static int read_header(AVFormatContext *s)
77{
78 BinkDemuxContext *bink = s->priv_data;
79 AVIOContext *pb = s->pb;
80 uint32_t fps_num, fps_den;
81 AVStream *vst, *ast;
82 unsigned int i;
83 uint32_t pos, next_pos;
84 uint16_t flags;
85 int keyframe;
86 int ret;
87
88 vst = avformat_new_stream(s, NULL);
89 if (!vst)
90 return AVERROR(ENOMEM);
91
92 vst->codec->codec_tag = avio_rl32(pb);
93
94 bink->file_size = avio_rl32(pb) + 8;
95 vst->duration = avio_rl32(pb);
96
97 if (vst->duration > 1000000) {
98 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n");
99 return AVERROR(EIO);
100 }
101
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");
105 return AVERROR(EIO);
106 }
107
108 avio_skip(pb, 4);
109
110 vst->codec->width = avio_rl32(pb);
111 vst->codec->height = avio_rl32(pb);
112
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",
118 fps_num, fps_den);
119 return AVERROR(EIO);
120 }
121 avpriv_set_pts_info(vst, 64, fps_den, fps_num);
122 vst->avg_frame_rate = av_inv_q(vst->time_base);
123
124 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
125 vst->codec->codec_id = AV_CODEC_ID_BINKVIDEO;
126
127 if ((vst->codec->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) {
128 av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n");
129 vst->codec->codec_id = AV_CODEC_ID_NONE;
130 }
131
132 if (ff_get_extradata(vst->codec, pb, 4) < 0)
133 return AVERROR(ENOMEM);
134
135 bink->num_audio_tracks = avio_rl32(pb);
136
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);
141 return AVERROR(EIO);
142 }
143
144 if (bink->num_audio_tracks) {
145 avio_skip(pb, 4 * bink->num_audio_tracks);
146
147 for (i = 0; i < bink->num_audio_tracks; i++) {
148 ast = avformat_new_stream(s, NULL);
149 if (!ast)
150 return AVERROR(ENOMEM);
151 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
152 ast->codec->codec_tag = 0;
153 ast->codec->sample_rate = avio_rl16(pb);
154 avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate);
155 flags = avio_rl16(pb);
156 ast->codec->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->codec->channels = 2;
160 ast->codec->channel_layout = AV_CH_LAYOUT_STEREO;
161 } else {
162 ast->codec->channels = 1;
163 ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
164 }
165 if (ff_alloc_extradata(ast->codec, 4))
166 return AVERROR(ENOMEM);
167 AV_WL32(ast->codec->extradata, vst->codec->codec_tag);
168 }
169
170 for (i = 0; i < bink->num_audio_tracks; i++)
171 s->streams[i + 1]->id = avio_rl32(pb);
172 }
173
174 /* frame index table */
175 next_pos = avio_rl32(pb);
176 for (i = 0; i < vst->duration; i++) {
177 pos = next_pos;
178 if (i == vst->duration - 1) {
179 next_pos = bink->file_size;
180 keyframe = 0;
181 } else {
182 next_pos = avio_rl32(pb);
183 keyframe = pos & 1;
184 }
185 pos &= ~1;
186 next_pos &= ~1;
187
188 if (next_pos <= pos) {
189 av_log(s, AV_LOG_ERROR, "invalid frame index table\n");
190 return AVERROR(EIO);
191 }
192 if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0,
193 keyframe ? AVINDEX_KEYFRAME : 0)) < 0)
194 return ret;
195 }
196
197 avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
198
199 bink->current_track = -1;
200 return 0;
201}
202
203static int read_packet(AVFormatContext *s, AVPacket *pkt)
204{
205 BinkDemuxContext *bink = s->priv_data;
206 AVIOContext *pb = s->pb;
207 int ret;
208
209 if (bink->current_track < 0) {
210 int index_entry;
211 AVStream *st = s->streams[0]; // stream 0 is video stream with index
212
213 if (bink->video_pts >= st->duration)
214 return AVERROR_EOF;
215
216 index_entry = av_index_search_timestamp(st, bink->video_pts,
217 AVSEEK_FLAG_ANY);
218 if (index_entry < 0) {
219 av_log(s, AV_LOG_ERROR,
220 "could not find index entry for frame %"PRId64"\n",
221 bink->video_pts);
222 return AVERROR(EIO);
223 }
224
225 bink->remain_packet_size = st->index_entries[index_entry].size;
226 bink->current_track = 0;
227 }
228
229 while (bink->current_track < bink->num_audio_tracks) {
230 uint32_t audio_size = avio_rl32(pb);
231 if (audio_size > bink->remain_packet_size - 4) {
232 av_log(s, AV_LOG_ERROR,
233 "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n",
234 bink->video_pts, audio_size, bink->remain_packet_size);
235 return AVERROR(EIO);
236 }
237 bink->remain_packet_size -= 4 + audio_size;
238 bink->current_track++;
239 if (audio_size >= 4) {
240 /* get one audio packet per track */
241 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0)
242 return ret;
243 pkt->stream_index = bink->current_track;
244 pkt->pts = bink->audio_pts[bink->current_track - 1];
245
246 /* Each audio packet reports the number of decompressed samples
247 (in bytes). We use this value to calcuate the audio PTS */
248 if (pkt->size >= 4)
249 bink->audio_pts[bink->current_track -1] +=
250 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
251 return 0;
252 } else {
253 avio_skip(pb, audio_size);
254 }
255 }
256
257 /* get video packet */
258 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0)
259 return ret;
260 pkt->stream_index = 0;
261 pkt->pts = bink->video_pts++;
262 pkt->flags |= AV_PKT_FLAG_KEY;
263
264 /* -1 instructs the next call to read_packet() to read the next frame */
265 bink->current_track = -1;
266
267 return 0;
268}
269
270static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
271{
272 BinkDemuxContext *bink = s->priv_data;
273 AVStream *vst = s->streams[0];
274
275 if (!s->pb->seekable)
276 return -1;
277
278 /* seek to the first frame */
279 if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0)
280 return -1;
281
282 bink->video_pts = 0;
283 memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
284 bink->current_track = -1;
285 return 0;
286}
287
288AVInputFormat ff_bink_demuxer = {
289 .name = "bink",
290 .long_name = NULL_IF_CONFIG_SMALL("Bink"),
291 .priv_data_size = sizeof(BinkDemuxContext),
292 .read_probe = probe,
293 .read_header = read_header,
294 .read_packet = read_packet,
295 .read_seek = read_seek,
296 .flags = AVFMT_SHOW_IDS,
297};