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/intreadwrite.h"
29 #include "libavutil/rational.h"
34 #define MLV_VERSION "v2.0"
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
41 #define MLV_AUDIO_CLASS_WAV 1
43 #define MLV_CLASS_FLAG_DELTA 0x40
44 #define MLV_CLASS_FLAG_LZMA 0x80
53 static int probe(AVProbeData *p)
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;
62 static int check_file_header(AVIOContext *pb, uint64_t guid)
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);
78 static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, int size)
80 char * value = av_malloc(size + 1);
86 avio_read(pb, value, size);
93 av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL);
96 static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
99 snprintf(value, sizeof(value), "%i", avio_r8(pb));
100 av_dict_set(&avctx->metadata, tag, value, 0);
103 static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
106 snprintf(value, sizeof(value), "%i", avio_rl16(pb));
107 av_dict_set(&avctx->metadata, tag, value, 0);
110 static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
113 snprintf(value, sizeof(value), fmt, avio_rl32(pb));
114 av_dict_set(&avctx->metadata, tag, value, 0);
117 static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
120 snprintf(value, sizeof(value), fmt, avio_rl64(pb));
121 av_dict_set(&avctx->metadata, tag, value, 0);
124 static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
126 MlvContext *mlv = avctx->priv_data;
127 AVIOContext *pb = mlv->pb[file];
129 while (!avio_feof(pb)) {
132 type = avio_rl32(pb);
133 size = avio_rl32(pb);
134 avio_skip(pb, 8); //timestamp
138 if (vst && type == MKTAG('R','A','W','I') && size >= 164) {
139 vst->codec->width = avio_rl16(pb);
140 vst->codec->height = avio_rl16(pb);
141 if (avio_rl32(pb) != 1)
142 avpriv_request_sample(avctx, "raw api version");
143 avio_skip(pb, 20); // pointer, width, height, pitch, frame_size
144 vst->codec->bits_per_coded_sample = avio_rl32(pb);
145 avio_skip(pb, 8 + 16 + 24); // black_level, white_level, xywh, active_area, exposure_bias
146 if (avio_rl32(pb) != 0x2010100) /* RGGB */
147 avpriv_request_sample(avctx, "cfa_pattern");
148 avio_skip(pb, 80); // calibration_illuminant1, color_matrix1, dynamic_range
149 vst->codec->pix_fmt = AV_PIX_FMT_BAYER_RGGB16LE;
150 vst->codec->codec_tag = MKTAG('B', 'I', 'T', 16);
152 } else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) {
153 ret = ff_get_wav_header(pb, ast->codec, 16);
157 } else if (type == MKTAG('I','N','F','O')) {
159 read_string(avctx, pb, "info", size);
161 } else if (type == MKTAG('I','D','N','T') && size >= 36) {
162 read_string(avctx, pb, "cameraName", 32);
163 read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32);
166 read_string(avctx, pb, "cameraSerial", 32);
169 } else if (type == MKTAG('L','E','N','S') && size >= 48) {
170 read_uint16(avctx, pb, "focalLength", "%i");
171 read_uint16(avctx, pb, "focalDist", "%i");
172 read_uint16(avctx, pb, "aperture", "%i");
173 read_uint8(avctx, pb, "stabilizerMode", "%i");
174 read_uint8(avctx, pb, "autofocusMode", "%i");
175 read_uint32(avctx, pb, "flags", "0x%"PRIx32);
176 read_uint32(avctx, pb, "lensID", "%"PRIi32);
177 read_string(avctx, pb, "lensName", 32);
180 read_string(avctx, pb, "lensSerial", 32);
183 } else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) {
184 uint64_t pts = avio_rl32(pb);
185 ff_add_index_entry(&vst->index_entries, &vst->nb_index_entries, &vst->index_entries_allocated_size,
186 avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
188 } else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) {
189 uint64_t pts = avio_rl32(pb);
190 ff_add_index_entry(&ast->index_entries, &ast->nb_index_entries, &ast->index_entries_allocated_size,
191 avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
193 } else if (vst && type == MKTAG('W','B','A','L') && size >= 28) {
194 read_uint32(avctx, pb, "wb_mode", "%"PRIi32);
195 read_uint32(avctx, pb, "kelvin", "%"PRIi32);
196 read_uint32(avctx, pb, "wbgain_r", "%"PRIi32);
197 read_uint32(avctx, pb, "wbgain_g", "%"PRIi32);
198 read_uint32(avctx, pb, "wbgain_b", "%"PRIi32);
199 read_uint32(avctx, pb, "wbs_gm", "%"PRIi32);
200 read_uint32(avctx, pb, "wbs_ba", "%"PRIi32);
202 } else if (type == MKTAG('R','T','C','I') && size >= 20) {
204 struct tm time = { 0 };
205 time.tm_sec = avio_rl16(pb);
206 time.tm_min = avio_rl16(pb);
207 time.tm_hour = avio_rl16(pb);
208 time.tm_mday = avio_rl16(pb);
209 time.tm_mon = avio_rl16(pb);
210 time.tm_year = avio_rl16(pb);
211 time.tm_wday = avio_rl16(pb);
212 time.tm_yday = avio_rl16(pb);
213 time.tm_isdst = avio_rl16(pb);
215 strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time);
216 av_dict_set(&avctx->metadata, "time", str, 0);
218 } else if (type == MKTAG('E','X','P','O') && size >= 16) {
219 av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0);
220 read_uint32(avctx, pb, "isoValue", "%"PRIi32);
221 read_uint32(avctx, pb, "isoAnalog", "%"PRIi32);
222 read_uint32(avctx, pb, "digitalGain", "%"PRIi32);
225 read_uint64(avctx, pb, "shutterValue", "%"PRIi64);
228 } else if (type == MKTAG('S','T','Y','L') && size >= 36) {
229 read_uint32(avctx, pb, "picStyleId", "%"PRIi32);
230 read_uint32(avctx, pb, "contrast", "%"PRIi32);
231 read_uint32(avctx, pb, "sharpness", "%"PRIi32);
232 read_uint32(avctx, pb, "saturation", "%"PRIi32);
233 read_uint32(avctx, pb, "colortone", "%"PRIi32);
234 read_string(avctx, pb, "picStyleName", 16);
236 } else if (type == MKTAG('M','A','R','K')) {
237 } else if (type == MKTAG('N','U','L','L')) {
238 } else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */
240 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);
247 static int read_header(AVFormatContext *avctx)
249 MlvContext *mlv = avctx->priv_data;
250 AVIOContext *pb = avctx->pb;
251 AVStream *vst = NULL, *ast = NULL;
257 size = avio_rl32(pb);
259 return AVERROR_INVALIDDATA;
263 guid = avio_rl64(pb);
264 snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid);
265 av_dict_set(&avctx->metadata, "guid", guidstr, 0);
267 avio_skip(pb, 8); //fileNum, fileCount, fileFlags
269 mlv->class[0] = avio_rl16(pb);
271 vst = avformat_new_stream(avctx, NULL);
273 return AVERROR(ENOMEM);
275 if ((mlv->class[0] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)))
276 avpriv_request_sample(avctx, "compression");
277 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
278 switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) {
279 case MLV_VIDEO_CLASS_RAW:
280 vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
282 case MLV_VIDEO_CLASS_YUV:
283 vst->codec->pix_fmt = AV_PIX_FMT_YUV420P;
284 vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
285 vst->codec->codec_tag = 0;
287 case MLV_VIDEO_CLASS_JPEG:
288 vst->codec->codec_id = AV_CODEC_ID_MJPEG;
289 vst->codec->codec_tag = 0;
291 case MLV_VIDEO_CLASS_H264:
292 vst->codec->codec_id = AV_CODEC_ID_H264;
293 vst->codec->codec_tag = 0;
296 avpriv_request_sample(avctx, "unknown video class");
300 mlv->class[1] = avio_rl16(pb);
302 ast = avformat_new_stream(avctx, NULL);
304 return AVERROR(ENOMEM);
306 if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA))
307 avpriv_request_sample(avctx, "compression");
308 if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV)
309 avpriv_request_sample(avctx, "unknown audio class");
311 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
312 avpriv_set_pts_info(ast, 33, 1, ast->codec->sample_rate);
316 vst->nb_frames = avio_rl32(pb);
321 ast->nb_frames = avio_rl32(pb);
326 AVRational framerate;
327 framerate.num = avio_rl32(pb);
328 framerate.den = avio_rl32(pb);
329 avpriv_set_pts_info(vst, 64, framerate.den, framerate.num);
333 avio_skip(pb, size - 52);
335 /* scan primary file */
336 mlv->pb[100] = avctx->pb;
337 ret = scan_file(avctx, vst, ast, 100);
341 /* scan secondary files */
342 if (strlen(avctx->filename) > 2) {
344 char *filename = av_strdup(avctx->filename);
346 return AVERROR(ENOMEM);
347 for (i = 0; i < 100; i++) {
348 snprintf(filename + strlen(filename) - 2, 3, "%02d", i);
349 if (avio_open2(&mlv->pb[i], filename, AVIO_FLAG_READ, &avctx->interrupt_callback, NULL) < 0)
351 if (check_file_header(mlv->pb[i], guid) < 0) {
352 av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename);
353 avio_close(mlv->pb[i]);
357 av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename);
358 ret = scan_file(avctx, vst, ast, i);
360 av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret));
361 avio_close(mlv->pb[i]);
370 vst->duration = vst->nb_index_entries;
372 ast->duration = ast->nb_index_entries;
375 avio_seek(pb, FFMIN(vst->index_entries[0].pos, ast->index_entries[0].pos), SEEK_SET);
377 avio_seek(pb, vst->index_entries[0].pos, SEEK_SET);
379 avio_seek(pb, ast->index_entries[0].pos, SEEK_SET);
384 static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
386 MlvContext *mlv = avctx->priv_data;
388 AVStream *st = avctx->streams[mlv->stream_index];
390 unsigned int size, space;
392 if (mlv->pts >= st->duration)
395 index = av_index_search_timestamp(st, mlv->pts, AVSEEK_FLAG_ANY);
397 av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts);
401 pb = mlv->pb[st->index_entries[index].size];
402 avio_seek(pb, st->index_entries[index].pos, SEEK_SET);
404 avio_skip(pb, 4); // blockType
405 size = avio_rl32(pb);
407 return AVERROR_INVALIDDATA;
408 avio_skip(pb, 12); //timestamp, frameNumber
409 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
410 avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY
411 space = avio_rl32(pb);
412 avio_skip(pb, space);
414 if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) {
415 ret = AVERROR_PATCHWELCOME;
416 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
417 ret = av_get_packet(pb, pkt, (st->codec->width * st->codec->height * st->codec->bits_per_coded_sample + 7) >> 3);
418 } else { // AVMEDIA_TYPE_AUDIO
419 if (space > UINT_MAX - 24 || size < (24 + space))
420 return AVERROR_INVALIDDATA;
421 ret = av_get_packet(pb, pkt, size - (24 + space));
427 pkt->stream_index = mlv->stream_index;
431 if (mlv->stream_index == avctx->nb_streams) {
432 mlv->stream_index = 0;
438 static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
440 MlvContext *mlv = avctx->priv_data;
442 if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
443 return AVERROR(ENOSYS);
445 if (!avctx->pb->seekable)
448 mlv->pts = timestamp;
452 static int read_close(AVFormatContext *s)
454 MlvContext *mlv = s->priv_data;
456 for (i = 0; i < 100; i++)
458 avio_close(mlv->pb[i]);
462 AVInputFormat ff_mlv_demuxer = {
464 .long_name = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"),
465 .priv_data_size = sizeof(MlvContext),
467 .read_header = read_header,
468 .read_packet = read_packet,
469 .read_close = read_close,
470 .read_seek = read_seek,