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
30 if( (x) < 0 ) return -1;\
36 struct mk_context *next, **prev, *parent;
37 struct mk_writer *owner;
41 unsigned d_cur, d_max;
44 typedef struct mk_context mk_context;
50 unsigned duration_ptr;
52 mk_context *root, *cluster, *frame;
58 int64_t cluster_tc_scaled;
59 int64_t frame_tc, prev_frame_tc_scaled, max_frame_tc;
61 char wrote_header, in_frame, keyframe;
64 static mk_context *mk_create_context( mk_writer *w, mk_context *parent, unsigned id )
71 w->freelist = w->freelist->next;
75 c = malloc( sizeof(*c) );
78 memset( c, 0, sizeof(*c) );
85 if( c->owner->actlist )
86 c->owner->actlist->prev = &c->next;
87 c->next = c->owner->actlist;
88 c->prev = &c->owner->actlist;
89 c->owner->actlist = c;
94 static int mk_append_context_data( mk_context *c, const void *data, unsigned size )
96 unsigned ns = c->d_cur + size;
101 unsigned dn = c->d_max ? c->d_max << 1 : 16;
105 dp = realloc( c->data, dn );
113 memcpy( (char*)c->data + c->d_cur, data, size );
120 static int mk_write_id( mk_context *c, unsigned id )
122 unsigned char c_id[4] = { id >> 24, id >> 16, id >> 8, id };
125 return mk_append_context_data( c, c_id, 4 );
127 return mk_append_context_data( c, c_id+1, 3 );
129 return mk_append_context_data( c, c_id+2, 2 );
130 return mk_append_context_data( c, c_id+3, 1 );
133 static int mk_write_size( mk_context *c, unsigned size )
135 unsigned char c_size[5] = { 0x08, size >> 24, size >> 16, size >> 8, size };
140 return mk_append_context_data( c, c_size+4, 1 );
145 return mk_append_context_data( c, c_size+3, 2 );
147 if( size < 0x1fffff )
150 return mk_append_context_data( c, c_size+2, 3 );
152 if( size < 0x0fffffff )
155 return mk_append_context_data( c, c_size+1, 4 );
157 return mk_append_context_data( c, c_size, 5 );
160 static int mk_flush_context_id( mk_context *c )
162 unsigned char ff = 0xff;
167 CHECK( mk_write_id( c->parent, c->id ) );
168 CHECK( mk_append_context_data( c->parent, &ff, 1 ) );
175 static int mk_flush_context_data(mk_context *c)
181 CHECK( mk_append_context_data( c->parent, c->data, c->d_cur ) );
182 else if( fwrite( c->data, c->d_cur, 1, c->owner->fp ) != 1 )
190 static int mk_close_context(mk_context *c, unsigned *off)
194 CHECK( mk_write_id( c->parent, c->id ) );
195 CHECK( mk_write_size( c->parent, c->d_cur ) );
198 if( c->parent && off )
199 *off += c->parent->d_cur;
201 CHECK( mk_flush_context_data( c ) );
204 c->next->prev = c->prev;
205 *(c->prev) = c->next;
206 c->next = c->owner->freelist;
207 c->owner->freelist = c;
212 static void mk_destroy_contexts( mk_writer *w )
214 mk_context *cur, *next;
216 for( cur = w->freelist; cur; cur = next )
223 for( cur = w->actlist; cur; cur = next )
230 w->freelist = w->actlist = w->root = NULL;
233 static int mk_write_string( mk_context *c, unsigned id, const char *str )
235 size_t len = strlen( str );
237 CHECK( mk_write_id( c, id ) );
238 CHECK( mk_write_size( c, len ) );
239 CHECK( mk_append_context_data( c, str, len ) );
243 static int mk_write_bin( mk_context *c, unsigned id, const void *data, unsigned size )
245 CHECK( mk_write_id( c, id ) );
246 CHECK( mk_write_size( c, size ) );
247 CHECK( mk_append_context_data( c, data, size ) ) ;
251 static int mk_write_uint( mk_context *c, unsigned id, int64_t ui )
253 unsigned char c_ui[8] = { ui >> 56, ui >> 48, ui >> 40, ui >> 32, ui >> 24, ui >> 16, ui >> 8, ui };
256 CHECK( mk_write_id( c, id ) );
257 while( i < 7 && !c_ui[i] )
259 CHECK( mk_write_size( c, 8 - i ) );
260 CHECK( mk_append_context_data( c, c_ui+i, 8 - i ) );
264 static int mk_write_sint( mk_context *c, unsigned id, int64_t si )
266 unsigned char c_si[8] = { si >> 56, si >> 48, si >> 40, si >> 32, si >> 24, si >> 16, si >> 8, si };
269 CHECK( mk_write_id( c, id ) );
271 while( i < 7 && c_si[i] == 0xff && c_si[i+1] & 0x80 )
274 while( i < 7 && c_si[i] == 0 && !(c_si[i+1] & 0x80 ) )
276 CHECK( mk_write_size( c, 8 - i ) );
277 CHECK( mk_append_context_data( c, c_si+i, 8 - i ) );
281 static int mk_write_float_raw( mk_context *c, float f )
288 unsigned char c_f[4];
296 return mk_append_context_data( c, c_f, 4 );
299 static int mk_write_float( mk_context *c, unsigned id, float f )
301 CHECK( mk_write_id( c, id ) );
302 CHECK( mk_write_size( c, 4 ) );
303 CHECK( mk_write_float_raw( c, f ) );
307 static unsigned mk_ebml_size_size( unsigned s )
320 static unsigned mk_ebml_sint_size( int64_t si )
322 unsigned char c_si[8] = { si >> 56, si >> 48, si >> 40, si >> 32, si >> 24, si >> 16, si >> 8, si };
326 while( i < 7 && c_si[i] == 0xff && c_si[i+1] & 0x80 )
329 while( i < 7 && c_si[i] == 0 && !(c_si[i+1] & 0x80) )
335 mk_writer *mk_create_writer( const char *filename )
337 mk_writer *w = malloc( sizeof(*w) );
341 memset( w, 0, sizeof(*w) );
343 w->root = mk_create_context( w, NULL, 0 );
350 w->fp = fopen( filename, "wb" );
353 mk_destroy_contexts( w );
358 w->timescale = 1000000;
363 int mk_writeHeader( mk_writer *w, const char *writing_app,
364 const char *codec_id,
365 const void *codec_private, unsigned codec_private_size,
366 int64_t default_frame_duration,
368 unsigned width, unsigned height,
369 unsigned d_width, unsigned d_height )
371 mk_context *c, *ti, *v;
373 if( w->wrote_header )
376 w->timescale = timescale;
377 w->def_duration = default_frame_duration;
379 if( !(c = mk_create_context(w, w->root, 0x1a45dfa3)) ) // EBML
381 CHECK( mk_write_uint( c, 0x4286, 1 ) ); // EBMLVersion
382 CHECK( mk_write_uint( c, 0x42f7, 1 ) ); // EBMLReadVersion
383 CHECK( mk_write_uint( c, 0x42f2, 4 ) ); // EBMLMaxIDLength
384 CHECK( mk_write_uint( c, 0x42f3, 8 ) ); // EBMLMaxSizeLength
385 CHECK( mk_write_string( c, 0x4282, "matroska") ); // DocType
386 CHECK( mk_write_uint( c, 0x4287, 1 ) ); // DocTypeVersion
387 CHECK( mk_write_uint( c, 0x4285, 1 ) ); // DocTypeReadversion
388 CHECK( mk_close_context( c, 0 ) );
390 if( !(c = mk_create_context( w, w->root, 0x18538067 )) ) // Segment
392 CHECK( mk_flush_context_id( c ) );
393 CHECK( mk_close_context( c, 0 ) );
395 if( !(c = mk_create_context(w, w->root, 0x1549a966)) ) // SegmentInfo
397 CHECK( mk_write_string( c, 0x4d80, "Haali Matroska Writer b0" ) );
398 CHECK( mk_write_string( c, 0x5741, writing_app ) );
399 CHECK( mk_write_uint( c, 0x2ad7b1, w->timescale ) );
400 CHECK( mk_write_float( c, 0x4489, 0) );
401 w->duration_ptr = c->d_cur - 4;
402 CHECK( mk_close_context( c, &w->duration_ptr ) );
404 if( !(c = mk_create_context( w, w->root, 0x1654ae6b )) ) // tracks
406 if( !(ti = mk_create_context( w, c, 0xae )) ) // TrackEntry
408 CHECK( mk_write_uint( ti, 0xd7, 1 ) ); // TrackNumber
409 CHECK( mk_write_uint( ti, 0x73c5, 1 ) ); // TrackUID
410 CHECK( mk_write_uint( ti, 0x83, 1 ) ); // TrackType
411 CHECK( mk_write_uint( ti, 0x9c, 0 ) ); // FlagLacing
412 CHECK( mk_write_string( ti, 0x86, codec_id ) ); // codec_id
413 if( codec_private_size )
414 CHECK( mk_write_bin( ti, 0x63a2, codec_private, codec_private_size ) ); // codec_private
415 if( default_frame_duration )
416 CHECK( mk_write_uint( ti, 0x23e383, default_frame_duration ) ); // DefaultDuration
418 if( !(v = mk_create_context( w, ti, 0xe0 ) ) ) // Video
420 CHECK( mk_write_uint( v, 0xb0, width ) );
421 CHECK( mk_write_uint( v, 0xba, height ) );
422 CHECK( mk_write_uint( v, 0x54b0, d_width ) );
423 CHECK( mk_write_uint( v, 0x54ba, d_height ) );
424 CHECK( mk_close_context( v, 0 ) );
426 CHECK( mk_close_context( ti, 0 ) );
428 CHECK( mk_close_context( c, 0 ) );
430 CHECK( mk_flush_context_data( w->root ) );
437 static int mk_close_cluster( mk_writer *w )
439 if( w->cluster == NULL )
441 CHECK( mk_close_context( w->cluster, 0 ) );
443 CHECK( mk_flush_context_data( w->root ) );
447 static int mk_flush_frame( mk_writer *w )
449 int64_t delta, ref = 0;
450 unsigned fsize, bgsize;
451 unsigned char c_delta_flags[3];
456 delta = w->frame_tc/w->timescale - w->cluster_tc_scaled;
457 if( delta > 32767ll || delta < -32768ll )
458 CHECK( mk_close_cluster( w ) );
462 w->cluster_tc_scaled = w->frame_tc / w->timescale;
463 w->cluster = mk_create_context( w, w->root, 0x1f43b675 ); // Cluster
467 CHECK( mk_write_uint( w->cluster, 0xe7, w->cluster_tc_scaled ) ); // Timecode
472 fsize = w->frame ? w->frame->d_cur : 0;
473 bgsize = fsize + 4 + mk_ebml_size_size( fsize + 4 ) + 1;
476 ref = w->prev_frame_tc_scaled - w->cluster_tc_scaled - delta;
477 bgsize += 1 + 1 + mk_ebml_sint_size( ref );
480 CHECK( mk_write_id( w->cluster, 0xa0 ) ); // BlockGroup
481 CHECK( mk_write_size( w->cluster, bgsize ) );
482 CHECK( mk_write_id( w->cluster, 0xa1 ) ); // Block
483 CHECK( mk_write_size( w->cluster, fsize + 4 ) );
484 CHECK( mk_write_size( w->cluster, 1 ) ); // track number
486 c_delta_flags[0] = delta >> 8;
487 c_delta_flags[1] = delta;
488 c_delta_flags[2] = 0;
489 CHECK( mk_append_context_data( w->cluster, c_delta_flags, 3 ) );
492 CHECK( mk_append_context_data(w->cluster, w->frame->data, w->frame->d_cur));
496 CHECK( mk_write_sint(w->cluster, 0xfb, ref ) ); // ReferenceBlock
499 w->prev_frame_tc_scaled = w->cluster_tc_scaled + delta;
501 if( w->cluster->d_cur > CLSIZE )
502 CHECK( mk_close_cluster( w ) );
507 int mk_start_frame( mk_writer *w )
509 if( mk_flush_frame( w ) < 0 )
518 int mk_set_frame_flags( mk_writer *w,int64_t timestamp, int keyframe )
523 w->frame_tc = timestamp;
524 w->keyframe = keyframe != 0;
526 if( w->max_frame_tc < timestamp )
527 w->max_frame_tc = timestamp;
532 int mk_add_frame_data( mk_writer *w, const void *data, unsigned size )
538 if( !(w->frame = mk_create_context( w, NULL, 0 )) )
541 return mk_append_context_data( w->frame, data, size );
544 int mk_close( mk_writer *w )
547 if( mk_flush_frame( w ) < 0 || mk_close_cluster( w ) < 0 )
549 if( w->wrote_header )
551 fseek( w->fp, w->duration_ptr, SEEK_SET );
552 if( mk_write_float_raw( w->root, (float)((double)(w->max_frame_tc+w->def_duration) / w->timescale) ) < 0 ||
553 mk_flush_context_data(w->root) < 0 )
556 mk_destroy_contexts( w );