1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2005 Mike Matsnev
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
19 *****************************************************************************/
23 #include "common/osdep.h"
26 #define CLSIZE 1048576
27 #define CHECK(x) do { if ((x) < 0) return -1; } while (0)
30 struct mk_Context *next, **prev, *parent;
31 struct mk_Writer *owner;
35 unsigned d_cur, d_max;
38 typedef struct mk_Context mk_Context;
43 unsigned duration_ptr;
45 mk_Context *root, *cluster, *frame;
51 int64_t cluster_tc_scaled;
52 int64_t frame_tc, prev_frame_tc_scaled, max_frame_tc;
54 char wrote_header, in_frame, keyframe;
57 static mk_Context *mk_createContext(mk_Writer *w, mk_Context *parent, unsigned id) {
62 w->freelist = w->freelist->next;
64 c = malloc(sizeof(*c));
67 memset(c, 0, sizeof(*c));
74 if (c->owner->actlist)
75 c->owner->actlist->prev = &c->next;
76 c->next = c->owner->actlist;
77 c->prev = &c->owner->actlist;
78 c->owner->actlist = c;
83 static int mk_appendContextData(mk_Context *c, const void *data, unsigned size) {
84 unsigned ns = c->d_cur + size;
88 unsigned dn = c->d_max ? c->d_max << 1 : 16;
92 dp = realloc(c->data, dn);
100 memcpy((char*)c->data + c->d_cur, data, size);
107 static int mk_writeID(mk_Context *c, unsigned id) {
108 unsigned char c_id[4] = { id >> 24, id >> 16, id >> 8, id };
111 return mk_appendContextData(c, c_id, 4);
113 return mk_appendContextData(c, c_id+1, 3);
115 return mk_appendContextData(c, c_id+2, 2);
116 return mk_appendContextData(c, c_id+3, 1);
119 static int mk_writeSize(mk_Context *c, unsigned size) {
120 unsigned char c_size[5] = { 0x08, size >> 24, size >> 16, size >> 8, size };
124 return mk_appendContextData(c, c_size+4, 1);
128 return mk_appendContextData(c, c_size+3, 2);
130 if (size < 0x1fffff) {
132 return mk_appendContextData(c, c_size+2, 3);
134 if (size < 0x0fffffff) {
136 return mk_appendContextData(c, c_size+1, 4);
138 return mk_appendContextData(c, c_size, 5);
141 static int mk_flushContextID(mk_Context *c) {
142 unsigned char ff = 0xff;
147 CHECK(mk_writeID(c->parent, c->id));
148 CHECK(mk_appendContextData(c->parent, &ff, 1));
155 static int mk_flushContextData(mk_Context *c) {
160 CHECK(mk_appendContextData(c->parent, c->data, c->d_cur));
162 if (fwrite(c->data, c->d_cur, 1, c->owner->fp) != 1)
170 static int mk_closeContext(mk_Context *c, unsigned *off) {
172 CHECK(mk_writeID(c->parent, c->id));
173 CHECK(mk_writeSize(c->parent, c->d_cur));
176 if (c->parent && off != NULL)
177 *off += c->parent->d_cur;
179 CHECK(mk_flushContextData(c));
182 c->next->prev = c->prev;
183 *(c->prev) = c->next;
184 c->next = c->owner->freelist;
185 c->owner->freelist = c;
190 static void mk_destroyContexts(mk_Writer *w) {
191 mk_Context *cur, *next;
193 for (cur = w->freelist; cur; cur = next) {
199 for (cur = w->actlist; cur; cur = next) {
205 w->freelist = w->actlist = w->root = NULL;
208 static int mk_writeStr(mk_Context *c, unsigned id, const char *str) {
209 size_t len = strlen(str);
211 CHECK(mk_writeID(c, id));
212 CHECK(mk_writeSize(c, len));
213 CHECK(mk_appendContextData(c, str, len));
217 static int mk_writeBin(mk_Context *c, unsigned id, const void *data, unsigned size) {
218 CHECK(mk_writeID(c, id));
219 CHECK(mk_writeSize(c, size));
220 CHECK(mk_appendContextData(c, data, size));
224 static int mk_writeUInt(mk_Context *c, unsigned id, int64_t ui) {
225 unsigned char c_ui[8] = { ui >> 56, ui >> 48, ui >> 40, ui >> 32, ui >> 24, ui >> 16, ui >> 8, ui };
228 CHECK(mk_writeID(c, id));
229 while (i < 7 && c_ui[i] == 0)
231 CHECK(mk_writeSize(c, 8 - i));
232 CHECK(mk_appendContextData(c, c_ui+i, 8 - i));
236 static int mk_writeSInt(mk_Context *c, unsigned id, int64_t si) {
237 unsigned char c_si[8] = { si >> 56, si >> 48, si >> 40, si >> 32, si >> 24, si >> 16, si >> 8, si };
240 CHECK(mk_writeID(c, id));
242 while (i < 7 && c_si[i] == 0xff && c_si[i+1] & 0x80)
245 while (i < 7 && c_si[i] == 0 && !(c_si[i+1] & 0x80))
247 CHECK(mk_writeSize(c, 8 - i));
248 CHECK(mk_appendContextData(c, c_si+i, 8 - i));
252 static int mk_writeFloatRaw(mk_Context *c, float f) {
257 unsigned char c_f[4];
265 return mk_appendContextData(c, c_f, 4);
268 static int mk_writeFloat(mk_Context *c, unsigned id, float f) {
269 CHECK(mk_writeID(c, id));
270 CHECK(mk_writeSize(c, 4));
271 CHECK(mk_writeFloatRaw(c, f));
275 static unsigned mk_ebmlSizeSize(unsigned s) {
287 static unsigned mk_ebmlSIntSize(int64_t si) {
288 unsigned char c_si[8] = { si >> 56, si >> 48, si >> 40, si >> 32, si >> 24, si >> 16, si >> 8, si };
292 while (i < 7 && c_si[i] == 0xff && c_si[i+1] & 0x80)
295 while (i < 7 && c_si[i] == 0 && !(c_si[i+1] & 0x80))
301 mk_Writer *mk_createWriter(const char *filename) {
302 mk_Writer *w = malloc(sizeof(*w));
306 memset(w, 0, sizeof(*w));
308 w->root = mk_createContext(w, NULL, 0);
309 if (w->root == NULL) {
314 w->fp = fopen(filename, "wb");
316 mk_destroyContexts(w);
321 w->timescale = 1000000;
326 int mk_writeHeader(mk_Writer *w, const char *writingApp,
328 const void *codecPrivate, unsigned codecPrivateSize,
329 int64_t default_frame_duration,
331 unsigned width, unsigned height,
332 unsigned d_width, unsigned d_height)
334 mk_Context *c, *ti, *v;
339 w->timescale = timescale;
340 w->def_duration = default_frame_duration;
342 if ((c = mk_createContext(w, w->root, 0x1a45dfa3)) == NULL) // EBML
344 CHECK(mk_writeUInt(c, 0x4286, 1)); // EBMLVersion
345 CHECK(mk_writeUInt(c, 0x42f7, 1)); // EBMLReadVersion
346 CHECK(mk_writeUInt(c, 0x42f2, 4)); // EBMLMaxIDLength
347 CHECK(mk_writeUInt(c, 0x42f3, 8)); // EBMLMaxSizeLength
348 CHECK(mk_writeStr(c, 0x4282, "matroska")); // DocType
349 CHECK(mk_writeUInt(c, 0x4287, 1)); // DocTypeVersion
350 CHECK(mk_writeUInt(c, 0x4285, 1)); // DocTypeReadversion
351 CHECK(mk_closeContext(c, 0));
353 if ((c = mk_createContext(w, w->root, 0x18538067)) == NULL) // Segment
355 CHECK(mk_flushContextID(c));
356 CHECK(mk_closeContext(c, 0));
358 if ((c = mk_createContext(w, w->root, 0x1549a966)) == NULL) // SegmentInfo
360 CHECK(mk_writeStr(c, 0x4d80, "Haali Matroska Writer b0"));
361 CHECK(mk_writeStr(c, 0x5741, writingApp));
362 CHECK(mk_writeUInt(c, 0x2ad7b1, w->timescale));
363 CHECK(mk_writeFloat(c, 0x4489, 0));
364 w->duration_ptr = c->d_cur - 4;
365 CHECK(mk_closeContext(c, &w->duration_ptr));
367 if ((c = mk_createContext(w, w->root, 0x1654ae6b)) == NULL) // tracks
369 if ((ti = mk_createContext(w, c, 0xae)) == NULL) // TrackEntry
371 CHECK(mk_writeUInt(ti, 0xd7, 1)); // TrackNumber
372 CHECK(mk_writeUInt(ti, 0x73c5, 1)); // TrackUID
373 CHECK(mk_writeUInt(ti, 0x83, 1)); // TrackType
374 CHECK(mk_writeUInt(ti, 0x9c, 0)); // FlagLacing
375 CHECK(mk_writeStr(ti, 0x86, codecID)); // CodecID
376 if (codecPrivateSize)
377 CHECK(mk_writeBin(ti, 0x63a2, codecPrivate, codecPrivateSize)); // CodecPrivate
378 if (default_frame_duration)
379 CHECK(mk_writeUInt(ti, 0x23e383, default_frame_duration)); // DefaultDuration
381 if ((v = mk_createContext(w, ti, 0xe0)) == NULL) // Video
383 CHECK(mk_writeUInt(v, 0xb0, width));
384 CHECK(mk_writeUInt(v, 0xba, height));
385 CHECK(mk_writeUInt(v, 0x54b0, d_width));
386 CHECK(mk_writeUInt(v, 0x54ba, d_height));
387 CHECK(mk_closeContext(v, 0));
389 CHECK(mk_closeContext(ti, 0));
391 CHECK(mk_closeContext(c, 0));
393 CHECK(mk_flushContextData(w->root));
400 static int mk_closeCluster(mk_Writer *w) {
401 if (w->cluster == NULL)
403 CHECK(mk_closeContext(w->cluster, 0));
405 CHECK(mk_flushContextData(w->root));
409 static int mk_flushFrame(mk_Writer *w) {
410 int64_t delta, ref = 0;
411 unsigned fsize, bgsize;
412 unsigned char c_delta_flags[3];
417 delta = w->frame_tc/w->timescale - w->cluster_tc_scaled;
418 if (delta > 32767ll || delta < -32768ll)
419 CHECK(mk_closeCluster(w));
421 if (w->cluster == NULL) {
422 w->cluster_tc_scaled = w->frame_tc / w->timescale;
423 w->cluster = mk_createContext(w, w->root, 0x1f43b675); // Cluster
424 if (w->cluster == NULL)
427 CHECK(mk_writeUInt(w->cluster, 0xe7, w->cluster_tc_scaled)); // Timecode
432 fsize = w->frame ? w->frame->d_cur : 0;
433 bgsize = fsize + 4 + mk_ebmlSizeSize(fsize + 4) + 1;
435 ref = w->prev_frame_tc_scaled - w->cluster_tc_scaled - delta;
436 bgsize += 1 + 1 + mk_ebmlSIntSize(ref);
439 CHECK(mk_writeID(w->cluster, 0xa0)); // BlockGroup
440 CHECK(mk_writeSize(w->cluster, bgsize));
441 CHECK(mk_writeID(w->cluster, 0xa1)); // Block
442 CHECK(mk_writeSize(w->cluster, fsize + 4));
443 CHECK(mk_writeSize(w->cluster, 1)); // track number
445 c_delta_flags[0] = delta >> 8;
446 c_delta_flags[1] = delta;
447 c_delta_flags[2] = 0;
448 CHECK(mk_appendContextData(w->cluster, c_delta_flags, 3));
450 CHECK(mk_appendContextData(w->cluster, w->frame->data, w->frame->d_cur));
454 CHECK(mk_writeSInt(w->cluster, 0xfb, ref)); // ReferenceBlock
457 w->prev_frame_tc_scaled = w->cluster_tc_scaled + delta;
459 if (w->cluster->d_cur > CLSIZE)
460 CHECK(mk_closeCluster(w));
465 int mk_startFrame(mk_Writer *w) {
466 if (mk_flushFrame(w) < 0)
475 int mk_setFrameFlags(mk_Writer *w,int64_t timestamp, int keyframe) {
479 w->frame_tc = timestamp;
480 w->keyframe = keyframe != 0;
482 if (w->max_frame_tc < timestamp)
483 w->max_frame_tc = timestamp;
488 int mk_addFrameData(mk_Writer *w, const void *data, unsigned size) {
492 if (w->frame == NULL)
493 if ((w->frame = mk_createContext(w, NULL, 0)) == NULL)
496 return mk_appendContextData(w->frame, data, size);
499 int mk_close(mk_Writer *w) {
501 if (mk_flushFrame(w) < 0 || mk_closeCluster(w) < 0)
503 if (w->wrote_header) {
504 fseek(w->fp, w->duration_ptr, SEEK_SET);
505 if (mk_writeFloatRaw(w->root, (float)((double)(w->max_frame_tc+w->def_duration) / w->timescale)) < 0 ||
506 mk_flushContextData(w->root) < 0)
509 mk_destroyContexts(w);