1 /* $Id: common.c,v 1.15 2005/03/17 19:22:47 titer Exp $
3 This file is part of the HandBrake source code.
4 Homepage: <http://handbrake.m0k.org/>.
5 It may be used under the terms of the GNU General Public License. */
13 /**********************************************************************
15 *********************************************************************/
16 hb_rate_t hb_video_rates[] =
17 { { "5", 5400000 }, { "10", 2700000 }, { "12", 2250000 },
18 { "15", 1800000 }, { "23.976", 1126125 }, { "24", 1125000 },
19 { "25", 1080000 }, { "29.97", 900900 } };
20 int hb_video_rates_count = sizeof( hb_video_rates ) /
23 hb_rate_t hb_audio_rates[] =
24 { { "22.05", 22050 }, { "24", 24000 }, { "32", 32000 },
25 { "44.1", 44100 }, { "48", 48000 } };
26 int hb_audio_rates_count = sizeof( hb_audio_rates ) /
28 int hb_audio_rates_default = 3; /* 44100 Hz */
30 hb_rate_t hb_audio_bitrates[] =
31 { { "32", 32 }, { "40", 40 }, { "48", 48 }, { "56", 56 },
32 { "64", 64 }, { "80", 80 }, { "96", 96 }, { "112", 112 },
33 { "128", 128 }, { "160", 160 }, { "192", 192 }, { "224", 224 },
34 { "256", 256 }, { "320", 320 }, { "384", 384 } };
35 int hb_audio_bitrates_count = sizeof( hb_audio_bitrates ) /
37 int hb_audio_bitrates_default = 8; /* 128 kbps */
39 static hb_error_handler_t *error_handler = NULL;
41 hb_mixdown_t hb_audio_mixdowns[] =
42 { { "Mono", "HB_AMIXDOWN_MONO", "mono", HB_AMIXDOWN_MONO },
43 { "Stereo", "HB_AMIXDOWN_STEREO", "stereo", HB_AMIXDOWN_STEREO },
44 { "Dolby Surround", "HB_AMIXDOWN_DOLBY", "dpl1", HB_AMIXDOWN_DOLBY },
45 { "Dolby Pro Logic II", "HB_AMIXDOWN_DOLBYPLII", "dpl2", HB_AMIXDOWN_DOLBYPLII },
46 { "6-channel discrete", "HB_AMIXDOWN_6CH", "6ch", HB_AMIXDOWN_6CH } };
47 int hb_audio_mixdowns_count = sizeof( hb_audio_mixdowns ) /
48 sizeof( hb_mixdown_t );
50 int hb_mixdown_get_mixdown_from_short_name( const char * short_name )
53 for (i = 0; i < hb_audio_mixdowns_count; i++)
55 if (strcmp(hb_audio_mixdowns[i].short_name, short_name) == 0)
57 return hb_audio_mixdowns[i].amixdown;
63 const char * hb_mixdown_get_short_name_from_mixdown( int amixdown )
66 for (i = 0; i < hb_audio_mixdowns_count; i++)
68 if (hb_audio_mixdowns[i].amixdown == amixdown)
70 return hb_audio_mixdowns[i].short_name;
76 /**********************************************************************
78 **********************************************************************
79 * Given a numerator (num) and a denominator (den), reduce them to an
80 * equivalent fraction and store the result in x and y.
81 *********************************************************************/
82 void hb_reduce( int *x, int *y, int num, int den )
84 int lower = MIN( num, den );
88 for( i = lower - 1; i > 1; --i )
90 if( ( num % i == 0 ) && ( den % i == 0 ) )
99 /**********************************************************************
101 **********************************************************************
102 * Given the output width (if HB_KEEP_WIDTH) or height
103 * (HB_KEEP_HEIGHT) and the current crop values, calculates the
104 * correct height or width in order to respect the DVD aspect ratio
105 *********************************************************************/
106 void hb_fix_aspect( hb_job_t * job, int keep )
108 hb_title_t * title = job->title;
112 Widths and heights must be multiples of 16 and greater than or
114 Crop values must be multiples of 2, greater than or equal to 0
115 and less than half of the dimension */
116 job->width = MULTIPLE_16( job->width );
117 job->height = MULTIPLE_16( job->height );
118 job->width = MAX( 16, job->width );
119 job->height = MAX( 16, job->height );
120 for( i = 0; i < 4; i++ )
122 job->crop[i] = EVEN( job->crop[i] );
123 job->crop[i] = MAX( 0, job->crop[i] );
127 job->crop[i] = MIN( job->crop[i], ( title->height / 2 ) - 2 );
132 job->crop[i] = MIN( job->crop[i], ( title->width / 2 ) - 2 );
136 if( keep == HB_KEEP_WIDTH )
138 job->height = MULTIPLE_16(
139 (uint64_t) job->width * title->width * HB_ASPECT_BASE *
140 ( title->height - job->crop[0] - job->crop[1] ) /
141 ( (uint64_t) title->height * title->aspect *
142 ( title->width - job->crop[2] - job->crop[3] ) ) );
143 job->height = MAX( 16, job->height );
147 job->width = MULTIPLE_16(
148 (uint64_t) job->height * title->height * title->aspect *
149 ( title->width - job->crop[2] - job->crop[3] ) /
150 ( (uint64_t) title->width * HB_ASPECT_BASE *
151 ( title->height - job->crop[0] - job->crop[1] ) ) );
152 job->width = MAX( 16, job->width );
156 /**********************************************************************
158 **********************************************************************
160 *********************************************************************/
161 int hb_calc_bitrate( hb_job_t * job, int size )
163 int64_t avail = (int64_t) size * 1024 * 1024;
166 int samples_per_frame;
169 hb_title_t * title = job->title;
170 hb_chapter_t * chapter;
173 /* How many overhead bytes are used for each frame
193 /* How many audio samples we put in each frame */
194 switch( job->acodec )
197 case HB_ACODEC_VORBIS:
198 samples_per_frame = 1024;
201 samples_per_frame = 1152;
204 samples_per_frame = 1536;
210 /* Get the duration in seconds */
212 for( i = job->chapter_start; i <= job->chapter_end; i++ )
214 chapter = hb_list_item( title->list_chapter, i - 1 );
215 length += chapter->duration;
221 avail -= length * job->vrate * overhead / job->vrate_base;
223 for( i = 0; job->audios[i] >= 0; i++ )
227 if( job->acodec & HB_ACODEC_AC3 )
229 audio = hb_list_item( title->list_audio, job->audios[i] );
230 abitrate = audio->bitrate / 8;
234 abitrate = job->abitrate * 1000 / 8;
236 avail -= length * abitrate;
239 avail -= length * job->arate * overhead / samples_per_frame;
247 return ( avail / ( 125 * length ) );
250 /**********************************************************************
251 * hb_list implementation
252 **********************************************************************
253 * Basic and slow, but enough for what we need
254 *********************************************************************/
256 #define HB_LIST_DEFAULT_SIZE 20
260 /* Pointers to items in the list */
263 /* How many (void *) allocated in 'items' */
266 /* How many valid pointers in 'items' */
270 /**********************************************************************
272 **********************************************************************
273 * Allocates an empty list ready for HB_LIST_DEFAULT_SIZE items
274 *********************************************************************/
275 hb_list_t * hb_list_init()
279 l = calloc( sizeof( hb_list_t ), 1 );
280 l->items = calloc( HB_LIST_DEFAULT_SIZE * sizeof( void * ), 1 );
281 l->items_alloc = HB_LIST_DEFAULT_SIZE;
286 /**********************************************************************
288 **********************************************************************
289 * Returns the number of items currently in the list
290 *********************************************************************/
291 int hb_list_count( hb_list_t * l )
293 return l->items_count;
296 /**********************************************************************
298 **********************************************************************
299 * Adds an item at the end of the list, making it bigger if necessary.
300 * Can safely be called with a NULL pointer to add, it will be ignored.
301 *********************************************************************/
302 void hb_list_add( hb_list_t * l, void * p )
309 if( l->items_count == l->items_alloc )
311 /* We need a bigger boat */
312 l->items_alloc += HB_LIST_DEFAULT_SIZE;
313 l->items = realloc( l->items,
314 l->items_alloc * sizeof( void * ) );
317 l->items[l->items_count] = p;
321 /**********************************************************************
323 **********************************************************************
324 * Remove an item from the list. Bad things will happen if called
325 * with a NULL pointer or if the item is not in the list.
326 *********************************************************************/
327 void hb_list_rem( hb_list_t * l, void * p )
331 /* Find the item in the list */
332 for( i = 0; i < l->items_count; i++ )
334 if( l->items[i] == p )
340 /* Shift all items after it sizeof( void * ) bytes earlier */
341 memmove( &l->items[i], &l->items[i+1],
342 ( l->items_count - i - 1 ) * sizeof( void * ) );
347 /**********************************************************************
349 **********************************************************************
350 * Returns item at position i, or NULL if there are not that many
352 *********************************************************************/
353 void * hb_list_item( hb_list_t * l, int i )
355 if( i < 0 || i >= l->items_count )
363 /**********************************************************************
365 **********************************************************************
366 * Assuming all items are of type hb_buffer_t, returns the total
367 * number of bytes in the list
368 *********************************************************************/
369 int hb_list_bytes( hb_list_t * l )
376 for( i = 0; i < hb_list_count( l ); i++ )
378 buf = hb_list_item( l, i );
379 ret += buf->size - buf->cur;
385 /**********************************************************************
387 **********************************************************************
388 * Assuming all items are of type hb_buffer_t, copy <size> bytes from
389 * the list to <dst>, keeping the list unmodified.
390 *********************************************************************/
391 void hb_list_seebytes( hb_list_t * l, uint8_t * dst, int size )
398 for( i = 0, copied = 0; copied < size; i++ )
400 buf = hb_list_item( l, i );
401 copying = MIN( buf->size - buf->cur, size - copied );
402 memcpy( &dst[copied], &buf->data[buf->cur], copying );
407 /**********************************************************************
409 **********************************************************************
410 * Assuming all items are of type hb_buffer_t, copy <size> bytes from
411 * the list to <dst>. What's copied is removed from the list.
412 * The variable pointed by <pts> is set to the PTS of the buffer the
413 * first byte has been got from.
414 * The variable pointed by <pos> is set to the position of that byte
416 *********************************************************************/
417 void hb_list_getbytes( hb_list_t * l, uint8_t * dst, int size,
418 uint64_t * pts, uint64_t * pos )
425 /* So we won't have to deal with NULL pointers */
426 uint64_t dummy1, dummy2;
428 if( !pts ) pts = &dummy1;
429 if( !pos ) pos = &dummy2;
431 for( copied = 0, has_pts = 0; copied < size; )
433 buf = hb_list_item( l, 0 );
434 copying = MIN( buf->size - buf->cur, size - copied );
435 memcpy( &dst[copied], &buf->data[buf->cur], copying );
445 if( buf->cur >= buf->size )
447 hb_list_rem( l, buf );
448 hb_buffer_close( &buf );
455 /**********************************************************************
457 **********************************************************************
458 * Assuming all items are of type hb_buffer_t, close them all and
460 *********************************************************************/
461 void hb_list_empty( hb_list_t ** _l )
466 while( ( b = hb_list_item( l, 0 ) ) )
469 hb_buffer_close( &b );
475 /**********************************************************************
477 **********************************************************************
478 * Free memory allocated by hb_list_init. Does NOT free contents of
479 * items still in the list.
480 *********************************************************************/
481 void hb_list_close( hb_list_t ** _l )
491 /**********************************************************************
493 **********************************************************************
494 * If verbose mode is one, print message with timestamp. Messages
495 * longer than 180 characters are stripped ;p
496 *********************************************************************/
497 void hb_log( char * log, ... )
499 char string[182]; /* 180 chars + \n + \0 */
504 if( !getenv( "HB_DEBUG" ) )
506 /* We don't want to print it */
512 now = localtime( &_now );
513 sprintf( string, "[%02d:%02d:%02d] ",
514 now->tm_hour, now->tm_min, now->tm_sec );
516 /* Convert the message to a string */
517 va_start( args, log );
518 vsnprintf( string + 11, 169, log, args );
521 /* Add the end of line */
522 strcat( string, "\n" );
525 fprintf( stderr, "%s", string );
528 /**********************************************************************
530 **********************************************************************
531 * Using whatever output is available display this error.
532 *********************************************************************/
533 void hb_error( char * log, ... )
535 char string[181]; /* 180 chars + \0 */
538 /* Convert the message to a string */
539 va_start( args, log );
540 vsnprintf( string, 180, log, args );
544 * Got the error in a single string, send it off to be dispatched.
548 error_handler( string );
554 void hb_register_error_handler( hb_error_handler_t * handler )
556 error_handler = handler;
559 /**********************************************************************
561 **********************************************************************
563 *********************************************************************/
564 hb_title_t * hb_title_init( char * dvd, int index )
568 t = calloc( sizeof( hb_title_t ), 1 );
571 t->list_audio = hb_list_init();
572 t->list_chapter = hb_list_init();
573 t->list_subtitle = hb_list_init();
574 strcat( t->dvd, dvd );
579 /**********************************************************************
581 **********************************************************************
583 *********************************************************************/
584 void hb_title_close( hb_title_t ** _t )
586 hb_title_t * t = *_t;
588 hb_chapter_t * chapter;
589 hb_subtitle_t * subtitle;
591 while( ( audio = hb_list_item( t->list_audio, 0 ) ) )
593 hb_list_rem( t->list_audio, audio );
596 hb_list_close( &t->list_audio );
598 while( ( chapter = hb_list_item( t->list_chapter, 0 ) ) )
600 hb_list_rem( t->list_chapter, chapter );
603 hb_list_close( &t->list_chapter );
605 while( ( subtitle = hb_list_item( t->list_subtitle, 0 ) ) )
607 hb_list_rem( t->list_subtitle, subtitle );
610 hb_list_close( &t->list_subtitle );