2 * Magic Lantern Video (MLV) demuxer
3 * Copyright (c) 2014 Peter Ross
5 * This file is part of FFmpeg.
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.
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.
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
24 * Magic Lantern Video (MLV) demuxer
27 #include "libavutil/eval.h"
28 #include "libavutil/imgutils.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/rational.h"
32 #include "avio_internal.h"
36 #define MLV_VERSION "v2.0"
38 #define MLV_VIDEO_CLASS_RAW 1
39 #define MLV_VIDEO_CLASS_YUV 2
40 #define MLV_VIDEO_CLASS_JPEG 3
41 #define MLV_VIDEO_CLASS_H264 4
43 #define MLV_AUDIO_CLASS_WAV 1
45 #define MLV_CLASS_FLAG_DELTA 0x40
46 #define MLV_CLASS_FLAG_LZMA 0x80
55 static int read_close(AVFormatContext *s);
57 static int probe(const AVProbeData *p)
59 if (AV_RL32(p->buf) == MKTAG('M','L','V','I') &&
60 AV_RL32(p->buf + 4) >= 52 &&
61 !memcmp(p->buf + 8, MLV_VERSION, 5))
62 return AVPROBE_SCORE_MAX;
66 static int check_file_header(AVIOContext *pb, uint64_t guid)
74 return AVERROR_INVALIDDATA;
75 avio_read(pb, version, 8);
76 if (memcmp(version, MLV_VERSION, 5) || avio_rl64(pb) != guid)
77 return AVERROR_INVALIDDATA;
78 avio_skip(pb, size - 24);
82 static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, unsigned size)
84 char * value = av_malloc(size + 1);
90 avio_read(pb, value, size);
97 av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL);
100 static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
102 av_dict_set_int(&avctx->metadata, tag, avio_r8(pb), 0);
105 static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
107 av_dict_set_int(&avctx->metadata, tag, avio_rl16(pb), 0);
110 static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
112 av_dict_set_int(&avctx->metadata, tag, avio_rl32(pb), 0);
115 static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
117 av_dict_set_int(&avctx->metadata, tag, avio_rl64(pb), 0);
120 static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
122 MlvContext *mlv = avctx->priv_data;
123 AVIOContext *pb = mlv->pb[file];
125 while (!avio_feof(pb)) {
128 type = avio_rl32(pb);
129 size = avio_rl32(pb);
130 avio_skip(pb, 8); //timestamp
134 if (vst && type == MKTAG('R','A','W','I') && size >= 164) {
135 vst->codecpar->width = avio_rl16(pb);
136 vst->codecpar->height = avio_rl16(pb);
137 ret = av_image_check_size(vst->codecpar->width, vst->codecpar->height, 0, avctx);
140 if (avio_rl32(pb) != 1)
141 avpriv_request_sample(avctx, "raw api version");
142 avio_skip(pb, 20); // pointer, width, height, pitch, frame_size
143 vst->codecpar->bits_per_coded_sample = avio_rl32(pb);
144 if (vst->codecpar->bits_per_coded_sample < 0 ||
145 vst->codecpar->bits_per_coded_sample > (INT_MAX - 7) / (vst->codecpar->width * vst->codecpar->height)) {
146 av_log(avctx, AV_LOG_ERROR,
147 "invalid bits_per_coded_sample %d (size: %dx%d)\n",
148 vst->codecpar->bits_per_coded_sample,
149 vst->codecpar->width, vst->codecpar->height);
150 return AVERROR_INVALIDDATA;
152 avio_skip(pb, 8 + 16 + 24); // black_level, white_level, xywh, active_area, exposure_bias
153 if (avio_rl32(pb) != 0x2010100) /* RGGB */
154 avpriv_request_sample(avctx, "cfa_pattern");
155 avio_skip(pb, 80); // calibration_illuminant1, color_matrix1, dynamic_range
156 vst->codecpar->format = AV_PIX_FMT_BAYER_RGGB16LE;
157 vst->codecpar->codec_tag = MKTAG('B', 'I', 'T', 16);
159 } else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) {
160 ret = ff_get_wav_header(avctx, pb, ast->codecpar, 16, 0);
164 } else if (type == MKTAG('I','N','F','O')) {
166 read_string(avctx, pb, "info", size);
168 } else if (type == MKTAG('I','D','N','T') && size >= 36) {
169 read_string(avctx, pb, "cameraName", 32);
170 read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32);
173 read_string(avctx, pb, "cameraSerial", 32);
176 } else if (type == MKTAG('L','E','N','S') && size >= 48) {
177 read_uint16(avctx, pb, "focalLength", "%i");
178 read_uint16(avctx, pb, "focalDist", "%i");
179 read_uint16(avctx, pb, "aperture", "%i");
180 read_uint8(avctx, pb, "stabilizerMode", "%i");
181 read_uint8(avctx, pb, "autofocusMode", "%i");
182 read_uint32(avctx, pb, "flags", "0x%"PRIx32);
183 read_uint32(avctx, pb, "lensID", "%"PRIi32);
184 read_string(avctx, pb, "lensName", 32);
187 read_string(avctx, pb, "lensSerial", 32);
190 } else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) {
191 uint64_t pts = avio_rl32(pb);
192 ff_add_index_entry(&vst->index_entries, &vst->nb_index_entries, &vst->index_entries_allocated_size,
193 avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
195 } else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) {
196 uint64_t pts = avio_rl32(pb);
197 ff_add_index_entry(&ast->index_entries, &ast->nb_index_entries, &ast->index_entries_allocated_size,
198 avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
200 } else if (vst && type == MKTAG('W','B','A','L') && size >= 28) {
201 read_uint32(avctx, pb, "wb_mode", "%"PRIi32);
202 read_uint32(avctx, pb, "kelvin", "%"PRIi32);
203 read_uint32(avctx, pb, "wbgain_r", "%"PRIi32);
204 read_uint32(avctx, pb, "wbgain_g", "%"PRIi32);
205 read_uint32(avctx, pb, "wbgain_b", "%"PRIi32);
206 read_uint32(avctx, pb, "wbs_gm", "%"PRIi32);
207 read_uint32(avctx, pb, "wbs_ba", "%"PRIi32);
209 } else if (type == MKTAG('R','T','C','I') && size >= 20) {
211 struct tm time = { 0 };
212 time.tm_sec = avio_rl16(pb);
213 time.tm_min = avio_rl16(pb);
214 time.tm_hour = avio_rl16(pb);
215 time.tm_mday = avio_rl16(pb);
216 time.tm_mon = avio_rl16(pb);
217 time.tm_year = avio_rl16(pb);
218 time.tm_wday = avio_rl16(pb);
219 time.tm_yday = avio_rl16(pb);
220 time.tm_isdst = avio_rl16(pb);
222 if (strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time))
223 av_dict_set(&avctx->metadata, "time", str, 0);
225 } else if (type == MKTAG('E','X','P','O') && size >= 16) {
226 av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0);
227 read_uint32(avctx, pb, "isoValue", "%"PRIi32);
228 read_uint32(avctx, pb, "isoAnalog", "%"PRIi32);
229 read_uint32(avctx, pb, "digitalGain", "%"PRIi32);
232 read_uint64(avctx, pb, "shutterValue", "%"PRIi64);
235 } else if (type == MKTAG('S','T','Y','L') && size >= 36) {
236 read_uint32(avctx, pb, "picStyleId", "%"PRIi32);
237 read_uint32(avctx, pb, "contrast", "%"PRIi32);
238 read_uint32(avctx, pb, "sharpness", "%"PRIi32);
239 read_uint32(avctx, pb, "saturation", "%"PRIi32);
240 read_uint32(avctx, pb, "colortone", "%"PRIi32);
241 read_string(avctx, pb, "picStyleName", 16);
243 } else if (type == MKTAG('M','A','R','K')) {
244 } else if (type == MKTAG('N','U','L','L')) {
245 } else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */
247 av_log(avctx, AV_LOG_INFO, "unsupported tag %s, size %u\n",
248 av_fourcc2str(type), size);
255 static int read_header(AVFormatContext *avctx)
257 MlvContext *mlv = avctx->priv_data;
258 AVIOContext *pb = avctx->pb;
259 AVStream *vst = NULL, *ast = NULL;
261 unsigned nb_video_frames, nb_audio_frames;
266 size = avio_rl32(pb);
268 return AVERROR_INVALIDDATA;
272 guid = avio_rl64(pb);
273 snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid);
274 av_dict_set(&avctx->metadata, "guid", guidstr, 0);
276 avio_skip(pb, 8); //fileNum, fileCount, fileFlags
278 mlv->class[0] = avio_rl16(pb);
279 mlv->class[1] = avio_rl16(pb);
281 nb_video_frames = avio_rl32(pb);
282 nb_audio_frames = avio_rl32(pb);
284 if (nb_video_frames && mlv->class[0]) {
285 vst = avformat_new_stream(avctx, NULL);
287 return AVERROR(ENOMEM);
289 vst->nb_frames = nb_video_frames;
290 if ((mlv->class[0] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)))
291 avpriv_request_sample(avctx, "compression");
292 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
293 switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) {
294 case MLV_VIDEO_CLASS_RAW:
295 vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
297 case MLV_VIDEO_CLASS_YUV:
298 vst->codecpar->format = AV_PIX_FMT_YUV420P;
299 vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
300 vst->codecpar->codec_tag = 0;
302 case MLV_VIDEO_CLASS_JPEG:
303 vst->codecpar->codec_id = AV_CODEC_ID_MJPEG;
304 vst->codecpar->codec_tag = 0;
306 case MLV_VIDEO_CLASS_H264:
307 vst->codecpar->codec_id = AV_CODEC_ID_H264;
308 vst->codecpar->codec_tag = 0;
311 avpriv_request_sample(avctx, "unknown video class");
315 if (nb_audio_frames && mlv->class[1]) {
316 ast = avformat_new_stream(avctx, NULL);
318 return AVERROR(ENOMEM);
320 ast->nb_frames = nb_audio_frames;
321 if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA))
322 avpriv_request_sample(avctx, "compression");
323 if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV)
324 avpriv_request_sample(avctx, "unknown audio class");
326 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
327 avpriv_set_pts_info(ast, 33, 1, ast->codecpar->sample_rate);
331 AVRational framerate;
332 framerate.num = avio_rl32(pb);
333 framerate.den = avio_rl32(pb);
334 avpriv_set_pts_info(vst, 64, framerate.den, framerate.num);
338 avio_skip(pb, size - 52);
340 /* scan primary file */
341 mlv->pb[100] = avctx->pb;
342 ret = scan_file(avctx, vst, ast, 100);
346 /* scan secondary files */
347 if (strlen(avctx->url) > 2) {
349 char *filename = av_strdup(avctx->url);
352 return AVERROR(ENOMEM);
354 for (i = 0; i < 100; i++) {
355 snprintf(filename + strlen(filename) - 2, 3, "%02d", i);
356 if (avctx->io_open(avctx, &mlv->pb[i], filename, AVIO_FLAG_READ, NULL) < 0)
358 if (check_file_header(mlv->pb[i], guid) < 0) {
359 av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename);
360 ff_format_io_close(avctx, &mlv->pb[i]);
363 av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename);
364 ret = scan_file(avctx, vst, ast, i);
366 av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret));
367 ff_format_io_close(avctx, &mlv->pb[i]);
375 vst->duration = vst->nb_index_entries;
377 ast->duration = ast->nb_index_entries;
379 if ((vst && !vst->nb_index_entries) || (ast && !ast->nb_index_entries)) {
380 av_log(avctx, AV_LOG_ERROR, "no index entries found\n");
382 return AVERROR_INVALIDDATA;
386 avio_seek(pb, FFMIN(vst->index_entries[0].pos, ast->index_entries[0].pos), SEEK_SET);
388 avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
390 avio_seek(pb, ast->index_entries[0].pos, SEEK_SET);
395 static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
397 MlvContext *mlv = avctx->priv_data;
401 unsigned int size, space;
403 if (!avctx->nb_streams)
406 st = avctx->streams[mlv->stream_index];
407 if (mlv->pts >= st->duration)
410 index = av_index_search_timestamp(st, mlv->pts, AVSEEK_FLAG_ANY);
412 av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts);
416 pb = mlv->pb[st->index_entries[index].size];
421 avio_seek(pb, st->index_entries[index].pos, SEEK_SET);
423 avio_skip(pb, 4); // blockType
424 size = avio_rl32(pb);
426 return AVERROR_INVALIDDATA;
427 avio_skip(pb, 12); //timestamp, frameNumber
428 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
429 avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY
430 space = avio_rl32(pb);
431 avio_skip(pb, space);
433 if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) {
434 ret = AVERROR_PATCHWELCOME;
435 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
436 ret = av_get_packet(pb, pkt, (st->codecpar->width * st->codecpar->height * st->codecpar->bits_per_coded_sample + 7) >> 3);
437 } else { // AVMEDIA_TYPE_AUDIO
438 if (space > UINT_MAX - 24 || size < (24 + space))
439 return AVERROR_INVALIDDATA;
440 ret = av_get_packet(pb, pkt, size - (24 + space));
446 pkt->stream_index = mlv->stream_index;
452 if (mlv->stream_index == avctx->nb_streams) {
453 mlv->stream_index = 0;
459 static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
461 MlvContext *mlv = avctx->priv_data;
463 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
464 return AVERROR(ENOSYS);
466 if (!(avctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
469 mlv->pts = timestamp;
473 static int read_close(AVFormatContext *s)
475 MlvContext *mlv = s->priv_data;
477 for (i = 0; i < 100; i++)
478 ff_format_io_close(s, &mlv->pb[i]);
482 AVInputFormat ff_mlv_demuxer = {
484 .long_name = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"),
485 .priv_data_size = sizeof(MlvContext),
487 .read_header = read_header,
488 .read_packet = read_packet,
489 .read_close = read_close,
490 .read_seek = read_seek,