FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/mlvdec.c
Date: 2026-04-30 13:16:32
Exec Total Coverage
Lines: 238 420 56.7%
Functions: 10 17 58.8%
Branches: 97 222 43.7%
Line Branch Exec Source
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 <time.h>
28
29 #include "libavcodec/bytestream.h"
30 #include "libavcodec/tiff.h"
31 #include "libavcodec/tiff_common.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/mem.h"
35 #include "libavutil/rational.h"
36 #include "avformat.h"
37 #include "demux.h"
38 #include "internal.h"
39 #include "avio_internal.h"
40 #include "riff.h"
41
42 #define MLV_VERSION "v2.0"
43
44 #define MLV_VIDEO_CLASS_RAW 1
45 #define MLV_VIDEO_CLASS_YUV 2
46 #define MLV_VIDEO_CLASS_JPEG 3
47 #define MLV_VIDEO_CLASS_H264 4
48
49 #define MLV_AUDIO_CLASS_WAV 1
50
51 #define MLV_CLASS_FLAG_LJ92 0x20
52 #define MLV_CLASS_FLAG_DELTA 0x40
53 #define MLV_CLASS_FLAG_LZMA 0x80
54
55 typedef struct {
56 AVIOContext *pb[101];
57 int class[2];
58 int stream_index;
59 uint64_t pts;
60 int black_level;
61 int white_level;
62 int color_matrix1[9][2];
63 } MlvContext;
64
65 7480 static int probe(const AVProbeData *p)
66 {
67
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 7480 if (AV_RL32(p->buf) == MKTAG('M','L','V','I') &&
68
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 1 AV_RL32(p->buf + 4) >= 52 &&
69
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 1 !memcmp(p->buf + 8, MLV_VERSION, 5))
70 1 return AVPROBE_SCORE_MAX;
71 7479 return 0;
72 }
73
74 ✗ static int check_file_header(AVIOContext *pb, uint64_t guid)
75 {
76 unsigned int size;
77 uint8_t version[8];
78 int ret;
79
80 ✗ avio_skip(pb, 4);
81 ✗ size = avio_rl32(pb);
82 ✗ if (size < 52)
83 ✗ return AVERROR_INVALIDDATA;
84 ✗ ret = ffio_read_size(pb, version, 8);
85 ✗ if (ret < 0)
86 ✗ return ret;
87 ✗ if (memcmp(version, MLV_VERSION, 5) || avio_rl64(pb) != guid)
88 ✗ return AVERROR_INVALIDDATA;
89 ✗ avio_skip(pb, size - 24);
90 ✗ return 0;
91 }
92
93 7 static void read_string(AVFormatContext *avctx, AVIOContext *pb, const char *tag, unsigned size)
94 {
95 7 char * value = av_malloc(size + 1);
96 int ret;
97
98
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 7 if (!value) {
99 ✗ avio_skip(pb, size);
100 ✗ return;
101 }
102
103 7 ret = avio_read(pb, value, size);
104
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 7 if (ret != size || !size || !value[0]) {
105 2 av_free(value);
106 2 return;
107 }
108
109 5 value[size] = 0;
110 5 av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL);
111 }
112
113 4 static void read_uint8(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
114 {
115 4 av_dict_set_int(&avctx->metadata, tag, avio_r8(pb), 0);
116 4 }
117
118 6 static void read_uint16(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
119 {
120 6 av_dict_set_int(&avctx->metadata, tag, avio_rl16(pb), 0);
121 6 }
122
123 23 static void read_uint32(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
124 {
125 23 av_dict_set_int(&avctx->metadata, tag, avio_rl32(pb), 0);
126 23 }
127
128 2 static void read_uint64(AVFormatContext *avctx, AVIOContext *pb, const char *tag, const char *fmt)
129 {
130 2 av_dict_set_int(&avctx->metadata, tag, avio_rl64(pb), 0);
131 2 }
132
133 1 static int scan_file(AVFormatContext *avctx, AVStream *vst, AVStream *ast, int file)
134 {
135 1 FFStream *const vsti = ffstream(vst), *const asti = ffstream(ast);
136 1 MlvContext *mlv = avctx->priv_data;
137 1 AVIOContext *pb = mlv->pb[file];
138 int ret;
139
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 13 while (!avio_feof(pb)) {
140 int type;
141 unsigned int size;
142 13 type = avio_rl32(pb);
143 13 size = avio_rl32(pb);
144 13 avio_skip(pb, 8); //timestamp
145
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 13 if (size < 16)
146 1 break;
147 12 size -= 16;
148
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 12 if (vst && type == MKTAG('R','A','W','I') && size >= 164) {
149 1 unsigned width = avio_rl16(pb);
150 1 unsigned height = avio_rl16(pb);
151 unsigned bits_per_coded_sample;
152 1 ret = av_image_check_size(width, height, 0, avctx);
153
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 1 if (ret < 0)
154 ✗ return ret;
155
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 1 if (avio_rl32(pb) != 1)
156 ✗ avpriv_request_sample(avctx, "raw api version");
157 1 avio_skip(pb, 20); // pointer, width, height, pitch, frame_size
158 1 bits_per_coded_sample = avio_rl32(pb);
159
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 1 if (bits_per_coded_sample > (INT_MAX - 7) / (width * height)) {
160 ✗ av_log(avctx, AV_LOG_ERROR,
161 "invalid bits_per_coded_sample %u (size: %ux%u)\n",
162 bits_per_coded_sample, width, height);
163 ✗ return AVERROR_INVALIDDATA;
164 }
165 1 vst->codecpar->width = width;
166 1 vst->codecpar->height = height;
167 1 vst->codecpar->bits_per_coded_sample = bits_per_coded_sample;
168 1 mlv->black_level = avio_rl32(pb);
169 1 mlv->white_level = avio_rl32(pb);
170 1 avio_skip(pb, 16 + 24); // xywh, active_area, exposure_bias
171
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 1 if (avio_rl32(pb) != 0x2010100) /* RGGB */
172 ✗ avpriv_request_sample(avctx, "cfa_pattern");
173 1 avio_skip(pb, 4); // calibration_illuminant1,
174
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 10 for (int i = 0; i < 9; i++) {
175 9 mlv->color_matrix1[i][0] = avio_rl32(pb);
176 9 mlv->color_matrix1[i][1] = avio_rl32(pb);
177 }
178 1 avio_skip(pb, 4); // dynamic_range
179 1 vst->codecpar->format = AV_PIX_FMT_BAYER_RGGB16LE;
180 1 vst->codecpar->codec_tag = MKTAG('B', 'I', 'T', 16);
181 1 size -= 164;
182
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 11 } else if (ast && type == MKTAG('W', 'A', 'V', 'I') && size >= 16) {
183 ✗ ret = ff_get_wav_header(avctx, pb, ast->codecpar, 16, 0);
184 ✗ if (ret < 0)
185 ✗ return ret;
186 ✗ size -= 16;
187
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 11 } else if (type == MKTAG('I','N','F','O')) {
188
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 1 if (size > 0)
189 ✗ read_string(avctx, pb, "info", size);
190 1 continue;
191
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 10 } else if (type == MKTAG('I','D','N','T') && size >= 36) {
192 1 read_string(avctx, pb, "cameraName", 32);
193 1 read_uint32(avctx, pb, "cameraModel", "0x%"PRIx32);
194 1 size -= 36;
195
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 1 if (size >= 32) {
196 1 read_string(avctx, pb, "cameraSerial", 32);
197 1 size -= 32;
198 }
199
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 9 } else if (type == MKTAG('L','E','N','S') && size >= 48) {
200 2 read_uint16(avctx, pb, "focalLength", "%i");
201 2 read_uint16(avctx, pb, "focalDist", "%i");
202 2 read_uint16(avctx, pb, "aperture", "%i");
203 2 read_uint8(avctx, pb, "stabilizerMode", "%i");
204 2 read_uint8(avctx, pb, "autofocusMode", "%i");
205 2 read_uint32(avctx, pb, "flags", "0x%"PRIx32);
206 2 read_uint32(avctx, pb, "lensID", "%"PRIi32);
207 2 read_string(avctx, pb, "lensName", 32);
208 2 size -= 48;
209
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 2 if (size >= 32) {
210 2 read_string(avctx, pb, "lensSerial", 32);
211 2 size -= 32;
212 }
213
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 7 } else if (vst && type == MKTAG('V', 'I', 'D', 'F') && size >= 4) {
214 1 uint64_t pts = avio_rl32(pb);
215 1 ff_add_index_entry(&vsti->index_entries, &vsti->nb_index_entries,
216 &vsti->index_entries_allocated_size,
217 1 avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
218 1 size -= 4;
219
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 6 } else if (ast && type == MKTAG('A', 'U', 'D', 'F') && size >= 4) {
220 ✗ uint64_t pts = avio_rl32(pb);
221 ✗ ff_add_index_entry(&asti->index_entries, &asti->nb_index_entries,
222 &asti->index_entries_allocated_size,
223 ✗ avio_tell(pb) - 20, pts, file, 0, AVINDEX_KEYFRAME);
224 ✗ size -= 4;
225
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 6 } else if (vst && type == MKTAG('W','B','A','L') && size >= 28) {
226 1 read_uint32(avctx, pb, "wb_mode", "%"PRIi32);
227 1 read_uint32(avctx, pb, "kelvin", "%"PRIi32);
228 1 read_uint32(avctx, pb, "wbgain_r", "%"PRIi32);
229 1 read_uint32(avctx, pb, "wbgain_g", "%"PRIi32);
230 1 read_uint32(avctx, pb, "wbgain_b", "%"PRIi32);
231 1 read_uint32(avctx, pb, "wbs_gm", "%"PRIi32);
232 1 read_uint32(avctx, pb, "wbs_ba", "%"PRIi32);
233 1 size -= 28;
234
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 5 } else if (type == MKTAG('R','T','C','I') && size >= 20) {
235 char str[32];
236 1 struct tm time = { 0 };
237 1 time.tm_sec = avio_rl16(pb);
238 1 time.tm_min = avio_rl16(pb);
239 1 time.tm_hour = avio_rl16(pb);
240 1 time.tm_mday = avio_rl16(pb);
241 1 time.tm_mon = avio_rl16(pb);
242 1 time.tm_year = avio_rl16(pb);
243 1 time.tm_wday = avio_rl16(pb);
244 1 time.tm_yday = avio_rl16(pb);
245 1 time.tm_isdst = avio_rl16(pb);
246 1 avio_skip(pb, 2);
247
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 1 if (strftime(str, sizeof(str), "%Y-%m-%d %H:%M:%S", &time))
248 1 av_dict_set(&avctx->metadata, "time", str, 0);
249 1 size -= 20;
250
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 4 } else if (type == MKTAG('E','X','P','O') && size >= 16) {
251
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 2 av_dict_set(&avctx->metadata, "isoMode", avio_rl32(pb) ? "auto" : "manual", 0);
252 2 read_uint32(avctx, pb, "isoValue", "%"PRIi32);
253 2 read_uint32(avctx, pb, "isoAnalog", "%"PRIi32);
254 2 read_uint32(avctx, pb, "digitalGain", "%"PRIi32);
255 2 size -= 16;
256
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 2 if (size >= 8) {
257 2 read_uint64(avctx, pb, "shutterValue", "%"PRIi64);
258 2 size -= 8;
259 }
260
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 2 } else if (type == MKTAG('S','T','Y','L') && size >= 36) {
261 1 read_uint32(avctx, pb, "picStyleId", "%"PRIi32);
262 1 read_uint32(avctx, pb, "contrast", "%"PRIi32);
263 1 read_uint32(avctx, pb, "sharpness", "%"PRIi32);
264 1 read_uint32(avctx, pb, "saturation", "%"PRIi32);
265 1 read_uint32(avctx, pb, "colortone", "%"PRIi32);
266 1 read_string(avctx, pb, "picStyleName", 16);
267 1 size -= 36;
268
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 1 } else if (type == MKTAG('V','E','R','S') && size >= 4) {
269 ✗ unsigned int length = avio_rl32(pb);
270 ✗ read_string(avctx, pb, "version", length);
271 ✗ size -= length + 4;
272
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 1 } else if (type == MKTAG('D','A','R','K')) {
273
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 1 } else if (type == MKTAG('D','I','S','O')) {
274
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 1 } else if (type == MKTAG('M','A','R','K')) {
275
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 1 } else if (type == MKTAG('N','U','L','L')) {
276 ✗ } else if (type == MKTAG('M','L','V','I')) { /* occurs when MLV and Mnn files are concatenated */
277 ✗ } else if (type == MKTAG('R','A','W','C')) {
278 } else {
279 ✗ av_log(avctx, AV_LOG_INFO, "unsupported tag %s, size %u\n",
280 ✗ av_fourcc2str(type), size);
281 }
282 11 avio_skip(pb, size);
283 }
284 1 return 0;
285 }
286
287 1 static int read_header(AVFormatContext *avctx)
288 {
289 1 MlvContext *mlv = avctx->priv_data;
290 1 AVIOContext *pb = avctx->pb;
291 1 AVStream *vst = NULL, *ast = NULL;
292 1 FFStream *vsti = NULL, *asti = NULL;
293 int size, ret;
294 unsigned nb_video_frames, nb_audio_frames;
295 uint64_t guid;
296 char guidstr[32];
297
298 1 avio_skip(pb, 4);
299 1 size = avio_rl32(pb);
300
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 1 if (size < 52)
301 ✗ return AVERROR_INVALIDDATA;
302
303 1 avio_skip(pb, 8);
304
305 1 guid = avio_rl64(pb);
306 1 snprintf(guidstr, sizeof(guidstr), "0x%"PRIx64, guid);
307 1 av_dict_set(&avctx->metadata, "guid", guidstr, 0);
308
309 1 avio_skip(pb, 8); //fileNum, fileCount, fileFlags
310
311 1 mlv->class[0] = avio_rl16(pb);
312 1 mlv->class[1] = avio_rl16(pb);
313
314 1 nb_video_frames = avio_rl32(pb);
315 1 nb_audio_frames = avio_rl32(pb);
316
317
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 1 if (nb_video_frames && mlv->class[0]) {
318 1 vst = avformat_new_stream(avctx, NULL);
319
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 1 if (!vst)
320 ✗ return AVERROR(ENOMEM);
321 1 vsti = ffstream(vst);
322
323 1 vst->id = 0;
324 1 vst->nb_frames = nb_video_frames;
325
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 1 if ((mlv->class[0] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)))
326 ✗ avpriv_request_sample(avctx, "compression");
327 1 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
328
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 1 switch (mlv->class[0] & ~(MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA)) {
329 1 case MLV_VIDEO_CLASS_RAW:
330 1 vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
331 1 break;
332 ✗ case MLV_VIDEO_CLASS_YUV:
333 ✗ vst->codecpar->format = AV_PIX_FMT_YUV420P;
334 ✗ vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
335 ✗ vst->codecpar->codec_tag = 0;
336 ✗ break;
337 ✗ case MLV_CLASS_FLAG_LJ92|MLV_VIDEO_CLASS_RAW:
338 ✗ vst->codecpar->codec_id = AV_CODEC_ID_TIFF;
339 ✗ break;
340 ✗ case MLV_VIDEO_CLASS_JPEG:
341 ✗ vst->codecpar->codec_id = AV_CODEC_ID_MJPEG;
342 ✗ vst->codecpar->codec_tag = 0;
343 ✗ break;
344 ✗ case MLV_VIDEO_CLASS_H264:
345 ✗ vst->codecpar->codec_id = AV_CODEC_ID_H264;
346 ✗ vst->codecpar->codec_tag = 0;
347 ✗ break;
348 ✗ default:
349 ✗ avpriv_request_sample(avctx, "unknown video class");
350 }
351 }
352
353
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 1 if (nb_audio_frames && mlv->class[1]) {
354 ✗ ast = avformat_new_stream(avctx, NULL);
355 ✗ if (!ast)
356 ✗ return AVERROR(ENOMEM);
357 ✗ asti = ffstream(ast);
358 ✗ ast->id = 1;
359 ✗ ast->nb_frames = nb_audio_frames;
360 ✗ if ((mlv->class[1] & MLV_CLASS_FLAG_LZMA))
361 ✗ avpriv_request_sample(avctx, "compression");
362 ✗ if ((mlv->class[1] & ~MLV_CLASS_FLAG_LZMA) != MLV_AUDIO_CLASS_WAV)
363 ✗ avpriv_request_sample(avctx, "unknown audio class");
364
365 ✗ ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
366 ✗ avpriv_set_pts_info(ast, 33, 1, ast->codecpar->sample_rate);
367 }
368
369
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 1 if (vst) {
370 AVRational framerate;
371 1 framerate.num = avio_rl32(pb);
372 1 framerate.den = avio_rl32(pb);
373 1 avpriv_set_pts_info(vst, 64, framerate.den, framerate.num);
374 } else
375 ✗ avio_skip(pb, 8);
376
377 1 avio_skip(pb, size - 52);
378
379 /* scan primary file */
380 1 mlv->pb[100] = avctx->pb;
381 1 ret = scan_file(avctx, vst, ast, 100);
382
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 1 if (ret < 0)
383 ✗ return ret;
384
385 /* scan secondary files */
386
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 1 if (strlen(avctx->url) > 2) {
387 int i;
388 1 char *filename = av_strdup(avctx->url);
389
390
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 1 if (!filename)
391 ✗ return AVERROR(ENOMEM);
392
393
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 1 for (i = 0; i < 100; i++) {
394 1 snprintf(filename + strlen(filename) - 2, 3, "%02d", i);
395
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 1 if (avctx->io_open(avctx, &mlv->pb[i], filename, AVIO_FLAG_READ, NULL) < 0)
396 1 break;
397 ✗ if (check_file_header(mlv->pb[i], guid) < 0) {
398 ✗ av_log(avctx, AV_LOG_WARNING, "ignoring %s; bad format or guid mismatch\n", filename);
399 ✗ ff_format_io_close(avctx, &mlv->pb[i]);
400 ✗ continue;
401 }
402 ✗ av_log(avctx, AV_LOG_INFO, "scanning %s\n", filename);
403 ✗ ret = scan_file(avctx, vst, ast, i);
404 ✗ if (ret < 0) {
405 ✗ av_log(avctx, AV_LOG_WARNING, "ignoring %s; %s\n", filename, av_err2str(ret));
406 ✗ ff_format_io_close(avctx, &mlv->pb[i]);
407 ✗ continue;
408 }
409 }
410 1 av_free(filename);
411 }
412
413
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 1 if (vst)
414 1 vst->duration = vsti->nb_index_entries;
415
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 1 if (ast)
416 ✗ ast->duration = asti->nb_index_entries;
417
418
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 1 if ((vst && !vsti->nb_index_entries) || (ast && !asti->nb_index_entries)) {
419 ✗ av_log(avctx, AV_LOG_ERROR, "no index entries found\n");
420 ✗ return AVERROR_INVALIDDATA;
421 }
422
423
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 1 if (vst && ast)
424 ✗ avio_seek(pb, FFMIN(vsti->index_entries[0].pos, asti->index_entries[0].pos), SEEK_SET);
425
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 1 else if (vst)
426 1 avio_seek(pb, vsti->index_entries[0].pos, SEEK_SET);
427 ✗ else if (ast)
428 ✗ avio_seek(pb, asti->index_entries[0].pos, SEEK_SET);
429
430 1 return 0;
431 }
432
433 ✗ static void write_tiff_short(PutByteContext *pb, int tag, int value)
434 {
435 ✗ bytestream2_put_le16(pb, tag);
436 ✗ bytestream2_put_le16(pb, AV_TIFF_SHORT);
437 ✗ bytestream2_put_le32(pb, 1);
438 ✗ bytestream2_put_le16(pb, value);
439 ✗ bytestream2_put_le16(pb, 0);
440 ✗ }
441
442 ✗ static void write_tiff_short2(PutByteContext *pb, int tag, int v1, int v2)
443 {
444 ✗ bytestream2_put_le16(pb, tag);
445 ✗ bytestream2_put_le16(pb, AV_TIFF_SHORT);
446 ✗ bytestream2_put_le32(pb, 2);
447 ✗ bytestream2_put_le16(pb, v1);
448 ✗ bytestream2_put_le16(pb, v2);
449 ✗ }
450
451 ✗ static void write_tiff_long(PutByteContext *pb, int tag, int value)
452 {
453 ✗ bytestream2_put_le16(pb, tag);
454 ✗ bytestream2_put_le16(pb, AV_TIFF_LONG);
455 ✗ bytestream2_put_le32(pb, 1);
456 ✗ bytestream2_put_le32(pb, value);
457 ✗ }
458
459 ✗ static void write_tiff_byte4(PutByteContext *pb, int tag, int v1, int v2, int v3, int v4)
460 {
461 ✗ bytestream2_put_le16(pb, tag);
462 ✗ bytestream2_put_le16(pb, AV_TIFF_BYTE);
463 ✗ bytestream2_put_le32(pb, 4);
464 ✗ bytestream2_put_byte(pb, v1);
465 ✗ bytestream2_put_byte(pb, v2);
466 ✗ bytestream2_put_byte(pb, v3);
467 ✗ bytestream2_put_byte(pb, v4);
468 ✗ }
469
470 ✗ static int get_packet_lj92(AVFormatContext *avctx, AVStream *st, AVIOContext *pbio, AVPacket *pkt, int64_t size)
471 {
472 ✗ MlvContext *mlv = avctx->priv_data;
473 ✗ PutByteContext pbctx, *pb = &pbctx;
474 int ret, header_size;
475 uint8_t *stripofs, *matrixofs;
476
477 #define MAX_HEADER_SIZE 2048
478 ✗ if ((uint64_t)size > INT32_MAX - MAX_HEADER_SIZE)
479 ✗ return AVERROR_PATCHWELCOME;
480
481 ✗ if ((ret = av_new_packet(pkt, size + MAX_HEADER_SIZE)) < 0)
482 ✗ return ret;
483
484 ✗ bytestream2_init_writer(pb, pkt->data, MAX_HEADER_SIZE);
485
486 ✗ bytestream2_put_le16(pb, 0x4949);
487 ✗ bytestream2_put_le16(pb, 42);
488 ✗ bytestream2_put_le32(pb, 8);
489
490 ✗ bytestream2_put_le16(pb, 18); /* nb_entries */
491
492 ✗ write_tiff_long(pb, TIFF_SUBFILE, 0);
493 ✗ write_tiff_long(pb, TIFF_WIDTH, st->codecpar->width);
494 ✗ write_tiff_long(pb, TIFF_HEIGHT, st->codecpar->height);
495 ✗ write_tiff_long(pb, TIFF_BPP, st->codecpar->bits_per_coded_sample);
496 ✗ write_tiff_short(pb, TIFF_COMPR, TIFF_NEWJPEG);
497 ✗ write_tiff_short(pb, TIFF_PHOTOMETRIC, TIFF_PHOTOMETRIC_CFA);
498 ✗ write_tiff_short(pb, TIFF_FILL_ORDER, 1);
499 ✗ write_tiff_long(pb, TIFF_STRIP_OFFS, 0); /* stripofs */
500 ✗ stripofs = pb->buffer - 4;
501
502 ✗ write_tiff_long(pb, TIFF_SAMPLES_PER_PIXEL, 1);
503 ✗ write_tiff_short(pb, TIFF_ROWSPERSTRIP, st->codecpar->height);
504 ✗ write_tiff_long(pb, TIFF_STRIP_SIZE, size);
505 ✗ write_tiff_short(pb, TIFF_PLANAR, 1);
506 ✗ write_tiff_short2(pb, TIFF_CFA_PATTERN_DIM, 2, 2);
507 ✗ write_tiff_byte4(pb, TIFF_CFA_PATTERN, 0, 1, 1, 2);
508 ✗ write_tiff_byte4(pb, DNG_VERSION, 1, 4, 0, 0);
509 ✗ write_tiff_long(pb, DNG_BLACK_LEVEL, mlv->black_level);
510 ✗ write_tiff_long(pb, DNG_WHITE_LEVEL, mlv->white_level);
511
512 ✗ bytestream2_put_le16(pb, DNG_COLOR_MATRIX1);
513 ✗ bytestream2_put_le16(pb, AV_TIFF_SRATIONAL);
514 ✗ bytestream2_put_le32(pb, 9);
515 ✗ bytestream2_put_le32(pb, 0); /* matrixofs */
516 ✗ matrixofs = pb->buffer - 4;
517 ✗ bytestream2_put_le32(pb, 0);
518
519 ✗ AV_WL32(matrixofs, bytestream2_tell_p(pb));
520 ✗ for (int i = 0; i < 9; i++) {
521 ✗ bytestream2_put_le32(pb, mlv->color_matrix1[i][0]);
522 ✗ bytestream2_put_le32(pb, mlv->color_matrix1[i][1]);
523 }
524
525 ✗ header_size = bytestream2_tell_p(pb);
526
527 ✗ AV_WL32(stripofs, header_size);
528 ✗ ret = avio_read(pbio, pkt->data + header_size, size);
529 ✗ if (ret < 0)
530 ✗ return ret;
531
532 ✗ return 0;
533 }
534
535 2 static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
536 {
537 2 MlvContext *mlv = avctx->priv_data;
538 AVIOContext *pb;
539 AVStream *st;
540 FFStream *sti;
541 int index, ret;
542 unsigned int size, space;
543
544
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 2 if (!avctx->nb_streams)
545 ✗ return AVERROR_EOF;
546
547 2 st = avctx->streams[mlv->stream_index];
548 2 sti = ffstream(st);
549
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 2 if (mlv->pts >= st->duration)
550 1 return AVERROR_EOF;
551
552 1 index = av_index_search_timestamp(st, mlv->pts, AVSEEK_FLAG_ANY);
553
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 1 if (index < 0) {
554 ✗ av_log(avctx, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", mlv->pts);
555 ✗ return AVERROR_INVALIDDATA;
556 }
557
558 1 pb = mlv->pb[sti->index_entries[index].size];
559
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 1 if (!pb) {
560 ✗ ret = FFERROR_REDO;
561 ✗ goto next_packet;
562 }
563 1 avio_seek(pb, sti->index_entries[index].pos, SEEK_SET);
564
565 1 avio_skip(pb, 4); // blockType
566 1 size = avio_rl32(pb);
567
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568 ✗ return AVERROR_INVALIDDATA;
569 1 avio_skip(pb, 12); //timestamp, frameNumber
570 1 size -= 12;
571
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 1 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
572
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 1 if (size < 8)
573 ✗ return AVERROR_INVALIDDATA;
574 1 avio_skip(pb, 8); // cropPosX, cropPosY, panPosX, panPosY
575 1 size -= 8;
576 }
577 1 space = avio_rl32(pb);
578
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 1 if (size < space + 4LL)
579 ✗ return AVERROR_INVALIDDATA;
580 1 avio_skip(pb, space);
581 1 size -= space;
582
583
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 1 if ((mlv->class[st->id] & (MLV_CLASS_FLAG_DELTA|MLV_CLASS_FLAG_LZMA))) {
584 ✗ ret = AVERROR_PATCHWELCOME;
585
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 1 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
586
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 1 if (st->codecpar->codec_id == AV_CODEC_ID_TIFF)
587 ✗ ret = get_packet_lj92(avctx, st, pb, pkt, size);
588 else
589 1 ret = av_get_packet(pb, pkt, (st->codecpar->width * st->codecpar->height * st->codecpar->bits_per_coded_sample + 7) >> 3);
590 } else { // AVMEDIA_TYPE_AUDIO
591 ✗ ret = av_get_packet(pb, pkt, size - 4);
592 }
593
594
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 1 if (ret < 0)
595 ✗ return ret;
596
597 1 pkt->stream_index = mlv->stream_index;
598 1 pkt->pts = mlv->pts;
599
600 1 ret = 0;
601 1 next_packet:
602 1 mlv->stream_index++;
603
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 1 if (mlv->stream_index == avctx->nb_streams) {
604 1 mlv->stream_index = 0;
605 1 mlv->pts++;
606 }
607 1 return ret;
608 }
609
610 ✗ static int read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags)
611 {
612 ✗ MlvContext *mlv = avctx->priv_data;
613
614 ✗ if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
615 ✗ return AVERROR(ENOSYS);
616
617 ✗ if (!(avctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
618 ✗ return AVERROR(ENOSYS);
619
620 ✗ mlv->pts = timestamp;
621 ✗ return 0;
622 }
623
624 1 static int read_close(AVFormatContext *s)
625 {
626 1 MlvContext *mlv = s->priv_data;
627 int i;
628
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 101 for (i = 0; i < 100; i++)
629 100 ff_format_io_close(s, &mlv->pb[i]);
630 1 return 0;
631 }
632
633 const FFInputFormat ff_mlv_demuxer = {
634 .p.name = "mlv",
635 .p.long_name = NULL_IF_CONFIG_SMALL("Magic Lantern Video (MLV)"),
636 .priv_data_size = sizeof(MlvContext),
637 .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
638 .read_probe = probe,
639 .read_header = read_header,
640 .read_packet = read_packet,
641 .read_close = read_close,
642 .read_seek = read_seek,
643 };
644