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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavformat / mlvdec.c
CommitLineData
2ba45a60
DM		 1/*
2 * Magic Lantern Video (MLV) demuxer
3 * Copyright (c) 2014 Peter Ross
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
23 * @file
24 * Magic Lantern Video (MLV) demuxer
25 */
26
27#include "libavutil/eval.h"
28#include "libavutil/intreadwrite.h"
29#include "libavutil/rational.h"
30#include "avformat.h"
31#include "internal.h"
32#include "riff.h"
33
34#define MLV_VERSION "v2.0"
35
36#define MLV_VIDEO_CLASS_RAW 1
37#define MLV_VIDEO_CLASS_YUV 2
38#define MLV_VIDEO_CLASS_JPEG 3
39#define MLV_VIDEO_CLASS_H264 4
40
41#define MLV_AUDIO_CLASS_WAV 1
42
43#define MLV_CLASS_FLAG_DELTA 0x40
44#define MLV_CLASS_FLAG_LZMA 0x80
45
46typedef struct {
47 AVIOContext *pb[101];
48 int class[2];
49 int stream_index;
50 uint64_t pts;
51} MlvContext;
52
53static int probe(AVProbeData *p)
54{
55 if (AV_RL32(p->buf) == MKTAG('M','L','V','I') &&
56 AV_RL32(p->buf + 4) >= 52 &&
57 !memcmp(p->buf + 8, MLV_VERSION, 5))
58 return AVPROBE_SCORE_MAX;
59 return 0;
60}
61
62static int check_file_header(AVIOContext *pb, uint64_t guid)
63{
64 unsigned int size;
65 uint8_t version[8];
66
67 avio_skip(pb, 4);
68 size = avio_rl32(pb);
69 if (size < 52)
70 return AVERROR_INVALIDDATA;
71 avio_read(pb, version, 8);
72 if (memcmp(version, MLV_VERSION, 5) || avio_rl64(pb) != guid)
73 return AVERROR_INVALIDDATA;
74 avio_skip(pb, size - 24);
75 return 0;
76}
77
78static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, int size)
79{
80 char * value = av_malloc(size + 1);
81 if (!value) {
82 avio_skip(pb, size);
83 return;
84 }
85
86 avio_read(pb, value, size);
87 if (!value[0]) {
88 av_free(value);
89 return;
90 }
91
92 value[size] = 0;
93 av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL);
94}
95
96static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
97{
98 av_dict_set_int(&avctx->metadata, tag, avio_r8(pb), 0);
99}
100
101static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
102{
103 av_dict_set_int(&avctx->metadata, tag, avio_rl16(pb), 0);
104}
105
106static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
107{
108 av_dict_set_int(&avctx->metadata, tag, avio_rl32(pb), 0);
109}
110
111static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
112{
113 av_dict_set_int(&avctx->metadata, tag, avio_rl64(pb), 0);
114}
115
116static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
117{
118 MlvContext *mlv = avctx->priv_data;
119 AVIOContext *pb = mlv->pb[file];
120 int ret;
121 while (!avio_feof(pb)) {
122 int type;
123 unsigned int size;
124 type = avio_rl32(pb);
125 size = avio_rl32(pb);
126 avio_skip(pb, 8); //timestamp
127 if (size < 16)
128 break;
129 size -= 16;
130 if (vst && type == MKTAG('R','A','W','I') && size >= 164) {
131 vst->codec->width = avio_rl16(pb);
132 vst->codec->height = avio_rl16(pb);
133 if (avio_rl32(pb) != 1)
134 avpriv_request_sample(avctx, "raw api version");
135 avio_skip(pb, 20); // pointer, width, height, pitch, frame_size
136 vst->codec->bits_per_coded_sample = avio_rl32(pb);
137 avio_skip(pb, 8 + 16 + 24); // black_level, white_level, xywh, active_area, exposure_bias
138 if (avio_rl32(pb) != 0x2010100) /* RGGB */
139 avpriv_request_sample(avctx, "cfa_pattern");
140 avio_skip(pb, 80); // calibration_illuminant1, color_matrix1, dynamic_range
141 vst->codec->pix_fmt = AV_PIX_FMT_BAYER_RGGB16LE;
142 vst->codec->codec_tag = MKTAG('B', 'I', 'T', 16);
143 size -= 164;
144 } else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) {
145 ret = ff_get_wav_header(pb, ast->codec, 16);
146 if (ret < 0)
147 return ret;
148 size -= 16;
149 } else if (type == MKTAG('I','N','F','O')) {
150 if (size > 0)
151 read_string(avctx, pb, "info", size);
152 continue;
153 } else if (type == MKTAG('I','D','N','T') && size >= 36) {
154 read_string(avctx, pb, "cameraName", 32);
155 read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32);
156 size -= 36;
157 if (size >= 32) {
158 read_string(avctx, pb, "cameraSerial", 32);
159 size -= 32;
160 }
161 } else if (type == MKTAG('L','E','N','S') && size >= 48) {
162 read_uint16(avctx, pb, "focalLength", "%i");
163 read_uint16(avctx, pb, "focalDist", "%i");
164 read_uint16(avctx, pb, "aperture", "%i");
165 read_uint8(avctx, pb, "stabilizerMode", "%i");
166 read_uint8(avctx, pb, "autofocusMode", "%i");
167 read_uint32(avctx, pb, "flags", "0x%"PRIx32);
168 read_uint32(avctx, pb, "lensID", "%"PRIi32);
169 read_string(avctx, pb, "lensName", 32);
170 size -= 48;
171 if (size >= 32) {
172 read_string(avctx, pb, "lensSerial", 32);
173 size -= 32;
174 }
175 } else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) {
176 uint64_t pts = avio_rl32(pb);
177 ff_add_index_entry(&vst->index_entries, &vst->nb_index_entries, &vst->index_entries_allocated_size,
178 avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
179 size -= 4;
180 } else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) {
181 uint64_t pts = avio_rl32(pb);
182 ff_add_index_entry(&ast->index_entries, &ast->nb_index_entries, &ast->index_entries_allocated_size,
183 avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
184 size -= 4;
185 } else if (vst && type == MKTAG('W','B','A','L') && size >= 28) {
186 read_uint32(avctx, pb, "wb_mode", "%"PRIi32);
187 read_uint32(avctx, pb, "kelvin", "%"PRIi32);
188 read_uint32(avctx, pb, "wbgain_r", "%"PRIi32);
189 read_uint32(avctx, pb, "wbgain_g", "%"PRIi32);
190 read_uint32(avctx, pb, "wbgain_b", "%"PRIi32);
191 read_uint32(avctx, pb, "wbs_gm", "%"PRIi32);
192 read_uint32(avctx, pb, "wbs_ba", "%"PRIi32);
193 size -= 28;
194 } else if (type == MKTAG('R','T','C','I') && size >= 20) {
195 char str[32];
196 struct tm time = { 0 };
197 time.tm_sec = avio_rl16(pb);
198 time.tm_min = avio_rl16(pb);
199 time.tm_hour = avio_rl16(pb);
200 time.tm_mday = avio_rl16(pb);
201 time.tm_mon = avio_rl16(pb);
202 time.tm_year = avio_rl16(pb);
203 time.tm_wday = avio_rl16(pb);
204 time.tm_yday = avio_rl16(pb);
205 time.tm_isdst = avio_rl16(pb);
206 avio_skip(pb, 2);
207 strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time);
208 av_dict_set(&avctx->metadata, "time", str, 0);
209 size -= 20;
210 } else if (type == MKTAG('E','X','P','O') && size >= 16) {
211 av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0);
212 read_uint32(avctx, pb, "isoValue", "%"PRIi32);
213 read_uint32(avctx, pb, "isoAnalog", "%"PRIi32);
214 read_uint32(avctx, pb, "digitalGain", "%"PRIi32);
215 size -= 16;
216 if (size >= 8) {
217 read_uint64(avctx, pb, "shutterValue", "%"PRIi64);
218 size -= 8;
219 }
220 } else if (type == MKTAG('S','T','Y','L') && size >= 36) {
221 read_uint32(avctx, pb, "picStyleId", "%"PRIi32);
222 read_uint32(avctx, pb, "contrast", "%"PRIi32);
223 read_uint32(avctx, pb, "sharpness", "%"PRIi32);
224 read_uint32(avctx, pb, "saturation", "%"PRIi32);
225 read_uint32(avctx, pb, "colortone", "%"PRIi32);
226 read_string(avctx, pb, "picStyleName", 16);
227 size -= 36;
228 } else if (type == MKTAG('M','A','R','K')) {
229 } else if (type == MKTAG('N','U','L','L')) {
230 } else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */
231 } else {
232 av_log(avctx, AV_LOG_INFO, "unsupported tag %c%c%c%c, size %u\n", type&0xFF, (type>>8)&0xFF, (type>>16)&0xFF, (type>>24)&0xFF, size);
233 }
234 avio_skip(pb, size);
235 }
236 return 0;
237}
238
239static int read_header(AVFormatContext *avctx)
240{
241 MlvContext *mlv = avctx->priv_data;
242 AVIOContext *pb = avctx->pb;
243 AVStream *vst = NULL, *ast = NULL;
244 int size, ret;
245 uint64_t guid;
246 char guidstr[32];
247
248 avio_skip(pb, 4);
249 size = avio_rl32(pb);
250 if (size < 52)
251 return AVERROR_INVALIDDATA;
252
253 avio_skip(pb, 8);
254
255 guid = avio_rl64(pb);
256 snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid);
257 av_dict_set(&avctx->metadata, "guid", guidstr, 0);
258
259 avio_skip(pb, 8); //fileNum, fileCount, fileFlags
260
261 mlv->class[0] = avio_rl16(pb);
262 if (mlv->class[0]) {
263 vst = avformat_new_stream(avctx, NULL);
264 if (!vst)
265 return AVERROR(ENOMEM);
266 vst->id = 0;
267 if ((mlv->class[0] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)))
268 avpriv_request_sample(avctx, "compression");
269 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
270 switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) {
271 case MLV_VIDEO_CLASS_RAW:
272 vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
273 break;
274 case MLV_VIDEO_CLASS_YUV:
275 vst->codec->pix_fmt = AV_PIX_FMT_YUV420P;
276 vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
277 vst->codec->codec_tag = 0;
278 break;
279 case MLV_VIDEO_CLASS_JPEG:
280 vst->codec->codec_id = AV_CODEC_ID_MJPEG;
281 vst->codec->codec_tag = 0;
282 break;
283 case MLV_VIDEO_CLASS_H264:
284 vst->codec->codec_id = AV_CODEC_ID_H264;
285 vst->codec->codec_tag = 0;
286 break;
287 default:
288 avpriv_request_sample(avctx, "unknown video class");
289 }
290 }
291
292 mlv->class[1] = avio_rl16(pb);
293 if (mlv->class[1]) {
294 ast = avformat_new_stream(avctx, NULL);
295 if (!ast)
296 return AVERROR(ENOMEM);
297 ast->id = 1;
298 if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA))
299 avpriv_request_sample(avctx, "compression");
300 if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV)
301 avpriv_request_sample(avctx, "unknown audio class");
302
303 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
304 avpriv_set_pts_info(ast, 33, 1, ast->codec->sample_rate);
305 }
306
307 if (vst)
308 vst->nb_frames = avio_rl32(pb);
309 else
310 avio_skip(pb, 4);
311
312 if (ast)
313 ast->nb_frames = avio_rl32(pb);
314 else
315 avio_skip(pb, 4);
316
317 if (vst) {
318 AVRational framerate;
319 framerate.num = avio_rl32(pb);
320 framerate.den = avio_rl32(pb);
321 avpriv_set_pts_info(vst, 64, framerate.den, framerate.num);
322 } else
323 avio_skip(pb, 8);
324
325 avio_skip(pb, size - 52);
326
327 /* scan primary file */
328 mlv->pb[100] = avctx->pb;
329 ret = scan_file(avctx, vst, ast, 100);
330 if (ret < 0)
331 return ret;
332
333 /* scan secondary files */
334 if (strlen(avctx->filename) > 2) {
335 int i;
336 char *filename = av_strdup(avctx->filename);
337 if (!filename)
338 return AVERROR(ENOMEM);
339 for (i = 0; i < 100; i++) {
340 snprintf(filename + strlen(filename) - 2, 3, "%02d", i);
341 if (avio_open2(&mlv->pb[i], filename, AVIO_FLAG_READ, &avctx->interrupt_callback, NULL) < 0)
342 break;
343 if (check_file_header(mlv->pb[i], guid) < 0) {
344 av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename);
345 avio_close(mlv->pb[i]);
346 mlv->pb[i] = NULL;
347 continue;
348 }
349 av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename);
350 ret = scan_file(avctx, vst, ast, i);
351 if (ret < 0) {
352 av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret));
353 avio_close(mlv->pb[i]);
354 mlv->pb[i] = NULL;
355 continue;
356 }
357 }
358 av_free(filename);
359 }
360
361 if (vst)
362 vst->duration = vst->nb_index_entries;
363 if (ast)
364 ast->duration = ast->nb_index_entries;
365
366 if (vst && ast)
367 avio_seek(pb, FFMIN(vst->index_entries[0].pos, ast->index_entries[0].pos), SEEK_SET);
368 else if (vst)
369 avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
370 else if (ast)
371 avio_seek(pb, ast->index_entries[0].pos, SEEK_SET);
372
373 return 0;
374}
375
376static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
377{
378 MlvContext *mlv = avctx->priv_data;
379 AVIOContext *pb;
380 AVStream *st = avctx->streams[mlv->stream_index];
381 int index, ret;
382 unsigned int size, space;
383
384 if (mlv->pts >= st->duration)
385 return AVERROR_EOF;
386
387 index = av_index_search_timestamp(st, mlv->pts, AVSEEK_FLAG_ANY);
388 if (index < 0) {
389 av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts);
390 return AVERROR(EIO);
391 }
392
393 pb = mlv->pb[st->index_entries[index].size];
394 avio_seek(pb, st->index_entries[index].pos, SEEK_SET);
395
396 avio_skip(pb, 4); // blockType
397 size = avio_rl32(pb);
398 if (size < 16)
399 return AVERROR_INVALIDDATA;
400 avio_skip(pb, 12); //timestamp, frameNumber
401 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
402 avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY
403 space = avio_rl32(pb);
404 avio_skip(pb, space);
405
406 if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) {
407 ret = AVERROR_PATCHWELCOME;
408 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
409 ret = av_get_packet(pb, pkt, (st->codec->width * st->codec->height * st->codec->bits_per_coded_sample + 7) >> 3);
410 } else { // AVMEDIA_TYPE_AUDIO
411 if (space > UINT_MAX - 24 || size < (24 + space))
412 return AVERROR_INVALIDDATA;
413 ret = av_get_packet(pb, pkt, size - (24 + space));
414 }
415
416 if (ret < 0)
417 return ret;
418
419 pkt->stream_index = mlv->stream_index;
420 pkt->pts = mlv->pts;
421
422 mlv->stream_index++;
423 if (mlv->stream_index == avctx->nb_streams) {
424 mlv->stream_index = 0;
425 mlv->pts++;
426 }
427 return 0;
428}
429
430static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
431{
432 MlvContext *mlv = avctx->priv_data;
433
434 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
435 return AVERROR(ENOSYS);
436
437 if (!avctx->pb->seekable)
438 return AVERROR(EIO);
439
440 mlv->pts = timestamp;
441 return 0;
442}
443
444static int read_close(AVFormatContext *s)
445{
446 MlvContext *mlv = s->priv_data;
447 int i;
448 for (i = 0; i < 100; i++)
449 if (mlv->pb[i])
450 avio_close(mlv->pb[i]);
451 return 0;
452}
453
454AVInputFormat ff_mlv_demuxer = {
455 .name = "mlv",
456 .long_name = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"),
457 .priv_data_size = sizeof(MlvContext),
458 .read_probe = probe,
459 .read_header = read_header,
460 .read_packet = read_packet,
461 .read_close = read_close,
462 .read_seek = read_seek,
463};
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