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-rw-r--r--libhb/common.c527
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diff --git a/libhb/common.c b/libhb/common.c
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+/* $Id: common.c,v 1.15 2005/03/17 19:22:47 titer Exp $
+
+ This file is part of the HandBrake source code.
+ Homepage: <http://handbrake.m0k.org/>.
+ It may be used under the terms of the GNU General Public License. */
+
+#include <stdarg.h>
+#include <time.h>
+#include <sys/time.h>
+
+#include "common.h"
+
+/**********************************************************************
+ * Global variables
+ *********************************************************************/
+hb_rate_t hb_video_rates[] =
+{ { "5", 5400000 }, { "10", 2700000 }, { "12", 2250000 },
+ { "15", 1800000 }, { "23.976", 1126125 }, { "24", 1125000 },
+ { "25", 1080000 }, { "29.97", 900900 } };
+int hb_video_rates_count = sizeof( hb_video_rates ) /
+ sizeof( hb_rate_t );
+
+hb_rate_t hb_audio_rates[] =
+{ { "22.05", 22050 }, { "24", 24000 }, { "32", 32000 },
+ { "44.1", 44100 }, { "48", 48000 } };
+int hb_audio_rates_count = sizeof( hb_audio_rates ) /
+ sizeof( hb_rate_t );
+int hb_audio_rates_default = 3; /* 44100 Hz */
+
+hb_rate_t hb_audio_bitrates[] =
+{ { "32", 32 }, { "40", 40 }, { "48", 48 }, { "56", 56 },
+ { "64", 64 }, { "80", 80 }, { "96", 96 }, { "112", 112 },
+ { "128", 128 }, { "160", 160 }, { "192", 192 }, { "224", 224 },
+ { "256", 256 }, { "320", 320 } };
+int hb_audio_bitrates_count = sizeof( hb_audio_bitrates ) /
+ sizeof( hb_rate_t );
+int hb_audio_bitrates_default = 8; /* 128 kbps */
+
+/**********************************************************************
+ * hb_reduce
+ **********************************************************************
+ * Given a numerator (num) and a denominator (den), reduce them to an
+ * equivalent fraction and store the result in x and y.
+ *********************************************************************/
+void hb_reduce( int *x, int *y, int num, int den )
+{
+ int lower = MIN( num, den );
+ int i;
+ *x = num;
+ *y = den;
+ for( i = lower - 1; i > 1; --i )
+ {
+ if( ( num % i == 0 ) && ( den % i == 0 ) )
+ {
+ *x = num / i;
+ *y = den / i;
+ break;
+ }
+ }
+}
+
+/**********************************************************************
+ * hb_fix_aspect
+ **********************************************************************
+ * Given the output width (if HB_KEEP_WIDTH) or height
+ * (HB_KEEP_HEIGHT) and the current crop values, calculates the
+ * correct height or width in order to respect the DVD aspect ratio
+ *********************************************************************/
+void hb_fix_aspect( hb_job_t * job, int keep )
+{
+ hb_title_t * title = job->title;
+ int i;
+
+ /* Sanity checks:
+ Widths and heights must be multiples of 16 and greater than or
+ equal to 16
+ Crop values must be multiples of 2, greater than or equal to 0
+ and less than half of the dimension */
+ job->width = MULTIPLE_16( job->width );
+ job->height = MULTIPLE_16( job->height );
+ job->width = MAX( 16, job->width );
+ job->height = MAX( 16, job->height );
+ for( i = 0; i < 4; i++ )
+ {
+ job->crop[i] = EVEN( job->crop[i] );
+ job->crop[i] = MAX( 0, job->crop[i] );
+ if( i < 2 )
+ {
+ /* Top, bottom */
+ job->crop[i] = MIN( job->crop[i], ( title->height / 2 ) - 2 );
+ }
+ else
+ {
+ /* Left, right */
+ job->crop[i] = MIN( job->crop[i], ( title->width / 2 ) - 2 );
+ }
+ }
+
+ if( keep == HB_KEEP_WIDTH )
+ {
+ job->height = MULTIPLE_16(
+ (uint64_t) job->width * title->width * HB_ASPECT_BASE *
+ ( title->height - job->crop[0] - job->crop[1] ) /
+ ( (uint64_t) title->height * title->aspect *
+ ( title->width - job->crop[2] - job->crop[3] ) ) );
+ job->height = MAX( 16, job->height );
+ }
+ else
+ {
+ job->width = MULTIPLE_16(
+ (uint64_t) job->height * title->height * title->aspect *
+ ( title->width - job->crop[2] - job->crop[3] ) /
+ ( (uint64_t) title->width * HB_ASPECT_BASE *
+ ( title->height - job->crop[0] - job->crop[1] ) ) );
+ job->width = MAX( 16, job->width );
+ }
+}
+
+/**********************************************************************
+ * hb_calc_bitrate
+ **********************************************************************
+ * size: in megabytes
+ *********************************************************************/
+int hb_calc_bitrate( hb_job_t * job, int size )
+{
+ int64_t avail = (int64_t) size * 1024 * 1024;
+ int64_t length;
+ int overhead;
+ int samples_per_frame;
+ int i;
+
+ hb_title_t * title = job->title;
+ hb_chapter_t * chapter;
+ hb_audio_t * audio;
+
+ /* How many overhead bytes are used for each frame
+ (quite guessed) */
+ switch( job->mux )
+ {
+ case HB_MUX_MP4:
+ case HB_MUX_PSP:
+ case HB_MUX_IPOD:
+ overhead = 6;
+ break;
+ case HB_MUX_AVI:
+ overhead = 24;
+ break;
+ case HB_MUX_OGM:
+ overhead = 6;
+ break;
+ default:
+ return 0;
+ }
+
+ /* How many audio samples we put in each frame */
+ switch( job->acodec )
+ {
+ case HB_ACODEC_FAAC:
+ case HB_ACODEC_VORBIS:
+ samples_per_frame = 1024;
+ break;
+ case HB_ACODEC_LAME:
+ samples_per_frame = 1152;
+ break;
+ case HB_ACODEC_AC3:
+ samples_per_frame = 1536;
+ break;
+ default:
+ return 0;
+ }
+
+ /* Get the duration in seconds */
+ length = 0;
+ for( i = job->chapter_start; i <= job->chapter_end; i++ )
+ {
+ chapter = hb_list_item( title->list_chapter, i - 1 );
+ length += chapter->duration;
+ }
+ length += 135000;
+ length /= 90000;
+
+ /* Video overhead */
+ avail -= length * job->vrate * overhead / job->vrate_base;
+
+ for( i = 0; job->audios[i] >= 0; i++ )
+ {
+ /* Audio data */
+ int abitrate;
+ if( job->acodec & HB_ACODEC_AC3 )
+ {
+ audio = hb_list_item( title->list_audio, job->audios[i] );
+ abitrate = audio->bitrate / 8;
+ }
+ else
+ {
+ abitrate = job->abitrate * 1000 / 8;
+ }
+ avail -= length * abitrate;
+
+ /* Audio overhead */
+ avail -= length * job->arate * overhead / samples_per_frame;
+ }
+
+ if( avail < 0 )
+ {
+ return 0;
+ }
+
+ return ( avail / ( 125 * length ) );
+}
+
+/**********************************************************************
+ * hb_list implementation
+ **********************************************************************
+ * Basic and slow, but enough for what we need
+ *********************************************************************/
+
+#define HB_LIST_DEFAULT_SIZE 20
+
+struct hb_list_s
+{
+ /* Pointers to items in the list */
+ void ** items;
+
+ /* How many (void *) allocated in 'items' */
+ int items_alloc;
+
+ /* How many valid pointers in 'items' */
+ int items_count;
+};
+
+/**********************************************************************
+ * hb_list_init
+ **********************************************************************
+ * Allocates an empty list ready for HB_LIST_DEFAULT_SIZE items
+ *********************************************************************/
+hb_list_t * hb_list_init()
+{
+ hb_list_t * l;
+
+ l = calloc( sizeof( hb_list_t ), 1 );
+ l->items = calloc( HB_LIST_DEFAULT_SIZE * sizeof( void * ), 1 );
+ l->items_alloc = HB_LIST_DEFAULT_SIZE;
+
+ return l;
+}
+
+/**********************************************************************
+ * hb_list_count
+ **********************************************************************
+ * Returns the number of items currently in the list
+ *********************************************************************/
+int hb_list_count( hb_list_t * l )
+{
+ return l->items_count;
+}
+
+/**********************************************************************
+ * hb_list_add
+ **********************************************************************
+ * Adds an item at the end of the list, making it bigger if necessary.
+ * Can safely be called with a NULL pointer to add, it will be ignored.
+ *********************************************************************/
+void hb_list_add( hb_list_t * l, void * p )
+{
+ if( !p )
+ {
+ return;
+ }
+
+ if( l->items_count == l->items_alloc )
+ {
+ /* We need a bigger boat */
+ l->items_alloc += HB_LIST_DEFAULT_SIZE;
+ l->items = realloc( l->items,
+ l->items_alloc * sizeof( void * ) );
+ }
+
+ l->items[l->items_count] = p;
+ (l->items_count)++;
+}
+
+/**********************************************************************
+ * hb_list_rem
+ **********************************************************************
+ * Remove an item from the list. Bad things will happen if called
+ * with a NULL pointer or if the item is not in the list.
+ *********************************************************************/
+void hb_list_rem( hb_list_t * l, void * p )
+{
+ int i;
+
+ /* Find the item in the list */
+ for( i = 0; i < l->items_count; i++ )
+ {
+ if( l->items[i] == p )
+ {
+ break;
+ }
+ }
+
+ /* Shift all items after it sizeof( void * ) bytes earlier */
+ memmove( &l->items[i], &l->items[i+1],
+ ( l->items_count - i - 1 ) * sizeof( void * ) );
+
+ (l->items_count)--;
+}
+
+/**********************************************************************
+ * hb_list_item
+ **********************************************************************
+ * Returns item at position i, or NULL if there are not that many
+ * items in the list
+ *********************************************************************/
+void * hb_list_item( hb_list_t * l, int i )
+{
+ if( i < 0 || i >= l->items_count )
+ {
+ return NULL;
+ }
+
+ return l->items[i];
+}
+
+/**********************************************************************
+ * hb_list_bytes
+ **********************************************************************
+ * Assuming all items are of type hb_buffer_t, returns the total
+ * number of bytes in the list
+ *********************************************************************/
+int hb_list_bytes( hb_list_t * l )
+{
+ hb_buffer_t * buf;
+ int ret;
+ int i;
+
+ ret = 0;
+ for( i = 0; i < hb_list_count( l ); i++ )
+ {
+ buf = hb_list_item( l, i );
+ ret += buf->size - buf->cur;
+ }
+
+ return ret;
+}
+
+/**********************************************************************
+ * hb_list_seebytes
+ **********************************************************************
+ * Assuming all items are of type hb_buffer_t, copy <size> bytes from
+ * the list to <dst>, keeping the list unmodified.
+ *********************************************************************/
+void hb_list_seebytes( hb_list_t * l, uint8_t * dst, int size )
+{
+ hb_buffer_t * buf;
+ int copied;
+ int copying;
+ int i;
+
+ for( i = 0, copied = 0; copied < size; i++ )
+ {
+ buf = hb_list_item( l, i );
+ copying = MIN( buf->size - buf->cur, size - copied );
+ memcpy( &dst[copied], &buf->data[buf->cur], copying );
+ copied += copying;
+ }
+}
+
+/**********************************************************************
+ * hb_list_getbytes
+ **********************************************************************
+ * Assuming all items are of type hb_buffer_t, copy <size> bytes from
+ * the list to <dst>. What's copied is removed from the list.
+ * The variable pointed by <pts> is set to the PTS of the buffer the
+ * first byte has been got from.
+ * The variable pointed by <pos> is set to the position of that byte
+ * in that buffer.
+ *********************************************************************/
+void hb_list_getbytes( hb_list_t * l, uint8_t * dst, int size,
+ uint64_t * pts, int * pos )
+{
+ hb_buffer_t * buf;
+ int copied;
+ int copying;
+ uint8_t has_pts;
+
+ /* So we won't have to deal with NULL pointers */
+ uint64_t dummy1;
+ int dummy2;
+ if( !pts ) pts = &dummy1;
+ if( !pos ) pos = &dummy2;
+
+ for( copied = 0, has_pts = 0; copied < size; )
+ {
+ buf = hb_list_item( l, 0 );
+ copying = MIN( buf->size - buf->cur, size - copied );
+ memcpy( &dst[copied], &buf->data[buf->cur], copying );
+
+ if( !has_pts )
+ {
+ *pts = buf->start;
+ *pos = buf->cur;
+ has_pts = 1;
+ }
+
+ buf->cur += copying;
+ if( buf->cur >= buf->size )
+ {
+ hb_list_rem( l, buf );
+ hb_buffer_close( &buf );
+ }
+
+ copied += copying;
+ }
+}
+
+/**********************************************************************
+ * hb_list_empty
+ **********************************************************************
+ * Assuming all items are of type hb_buffer_t, close them all and
+ * close the list.
+ *********************************************************************/
+void hb_list_empty( hb_list_t ** _l )
+{
+ hb_list_t * l = *_l;
+ hb_buffer_t * b;
+
+ while( ( b = hb_list_item( l, 0 ) ) )
+ {
+ hb_list_rem( l, b );
+ hb_buffer_close( &b );
+ }
+
+ hb_list_close( _l );
+}
+
+/**********************************************************************
+ * hb_list_close
+ **********************************************************************
+ * Free memory allocated by hb_list_init. Does NOT free contents of
+ * items still in the list.
+ *********************************************************************/
+void hb_list_close( hb_list_t ** _l )
+{
+ hb_list_t * l = *_l;
+
+ free( l->items );
+ free( l );
+
+ *_l = NULL;
+}
+
+/**********************************************************************
+ * hb_log
+ **********************************************************************
+ * If verbose mode is one, print message with timestamp. Messages
+ * longer than 80 characters are stripped ;p
+ *********************************************************************/
+void hb_log( char * log, ... )
+{
+ char string[82]; /* 80 chars + \n + \0 */
+ time_t _now;
+ struct tm * now;
+ va_list args;
+
+ if( !getenv( "HB_DEBUG" ) )
+ {
+ /* We don't want to print it */
+ return;
+ }
+
+ /* Get the time */
+ _now = time( NULL );
+ now = localtime( &_now );
+ sprintf( string, "[%02d:%02d:%02d] ",
+ now->tm_hour, now->tm_min, now->tm_sec );
+
+ /* Convert the message to a string */
+ va_start( args, log );
+ vsnprintf( string + 11, 69, log, args );
+ va_end( args );
+
+ /* Add the end of line */
+ strcat( string, "\n" );
+
+ /* Print it */
+ fprintf( stderr, "%s", string );
+}
+
+/**********************************************************************
+ * hb_title_init
+ **********************************************************************
+ *
+ *********************************************************************/
+hb_title_t * hb_title_init( char * dvd, int index )
+{
+ hb_title_t * t;
+
+ t = calloc( sizeof( hb_title_t ), 1 );
+
+ t->index = index;
+ t->list_audio = hb_list_init();
+ t->list_chapter = hb_list_init();
+ t->list_subtitle = hb_list_init();
+ strcat( t->dvd, dvd );
+
+ return t;
+}
+
+/**********************************************************************
+ * hb_title_close
+ **********************************************************************
+ *
+ *********************************************************************/
+void hb_title_close( hb_title_t ** _t )
+{
+ hb_title_t * t = *_t;
+
+ hb_list_close( &t->list_audio );
+ hb_list_close( &t->list_chapter );
+ hb_list_close( &t->list_subtitle );
+ free( t->job );
+
+ free( t );
+ *_t = NULL;
+}
+
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