static void LookForAudio( hb_title_t * title, hb_buffer_t * b );
static int AllAudioOK( hb_title_t * title );
+static const char *aspect_to_string( int aspect )
+{
+ switch ( aspect )
+ {
+ case HB_ASPECT_BASE * 1 / 1: return "1:1";
+ case HB_ASPECT_BASE * 4 / 3: return "4:3";
+ case HB_ASPECT_BASE * 16 / 9: return "16:9";
+ case HB_ASPECT_BASE * 221 / 100: return "2.21:1";
+ }
+ static char arstr[32];
+ double a = (double)aspect / HB_ASPECT_BASE;
+ sprintf( arstr, aspect >= 1.? "%.2f:1" : "1:%.2f", a );
+ return arstr;
+}
+
hb_thread_t * hb_scan_init( hb_handle_t * handle, const char * path,
int title_index, hb_list_t * list_title )
{
_data = NULL;
}
+// -----------------------------------------------
+// stuff related to cropping
+
+#define DARK 64
+
+static int row_all_dark( hb_title_t *title, uint8_t* luma, int row )
+{
+ int i = title->width;
+ luma += i * row;
+ while ( --i >= 0 )
+ {
+ if ( *luma++ > DARK )
+ return 0;
+ }
+ return 1;
+}
+
+static int column_all_dark( hb_title_t *title, uint8_t* luma, int top, int col )
+{
+ int i = title->height - top;
+ int stride = title->width;
+ luma += stride * top + col;
+ for ( ; --i >= 0; luma += stride )
+ {
+ if ( *luma > DARK )
+ return 0;
+ }
+ return 1;
+}
+#undef DARK
+
+typedef struct {
+ int n;
+ int t[10];
+ int b[10];
+ int l[10];
+ int r[10];
+} crop_record_t;
+
+static void record_crop( crop_record_t *crops, int t, int b, int l, int r )
+{
+ crops->t[crops->n] = t;
+ crops->b[crops->n] = b;
+ crops->l[crops->n] = l;
+ crops->r[crops->n] = r;
+ ++crops->n;
+}
+
+static int compare_int( const void *a, const void *b )
+{
+ return *(const int *)a - *(const int *)b;
+}
+
+static void sort_crops( crop_record_t *crops )
+{
+ qsort( crops->t, crops->n, sizeof(crops->t[0]), compare_int );
+ qsort( crops->b, crops->n, sizeof(crops->t[0]), compare_int );
+ qsort( crops->l, crops->n, sizeof(crops->t[0]), compare_int );
+ qsort( crops->r, crops->n, sizeof(crops->t[0]), compare_int );
+}
+
+// -----------------------------------------------
+// stuff related to title width/height/aspect info
+
+typedef struct {
+ int count; /* number of times we've seen this info entry */
+ hb_work_info_t info; /* copy of info entry */
+} info_list_t;
+
+static void remember_info( info_list_t *info_list, hb_work_info_t *info )
+{
+ for ( ; info_list->count; ++info_list )
+ {
+ if ( memcmp( &info_list->info, info, sizeof(*info) ) == 0 )
+ {
+ // we found a match - bump its count
+ ++info_list->count;
+ return;
+ }
+ }
+ // no match found - add new entry to list (info_list points to
+ // the first free slot). NB - we assume that info_list was allocated
+ // so that it's big enough even if there are no dups. I.e., 10 slots
+ // allocated if there are 10 previews.
+ info_list->count = 1;
+ info_list->info = *info;
+}
+
+static void most_common_info( info_list_t *info_list, hb_work_info_t *info )
+{
+ int i, biggest = 0;
+ for ( i = 1; info_list[i].count; ++i )
+ {
+ if ( info_list[i].count > info_list[biggest].count )
+ biggest = i;
+ }
+ *info = info_list[biggest].info;
+ free( info_list );
+}
+
/***********************************************************************
* DecodePreviews
***********************************************************************
hb_list_t * list_es;
int progressive_count = 0;
int interlaced_preview_count = 0;
- double last_ar = 0;
- int ar16_count = 0, ar4_count = 0;
+ info_list_t * info_list = calloc( 10+1, sizeof(*info_list) );
+ crop_record_t *crops = calloc( 1, sizeof(*crops) );
buf_ps = hb_buffer_init( HB_DVD_READ_BUFFER_SIZE );
list_es = hb_list_init();
for( i = 0; i < 10; i++ )
{
- int j, k;
+ int j;
FILE * file_preview;
char filename[1024];
vid_decoder->close( vid_decoder );
free( vid_decoder );
+ remember_info( info_list, &vid_info );
+
title->width = vid_info.width;
title->height = vid_info.height;
- title->pixel_aspect_width = vid_info.pixel_aspect_width;
- title->pixel_aspect_height = vid_info.pixel_aspect_height;
-
title->rate = vid_info.rate;
title->rate_base = vid_info.rate_base;
- if ( vid_info.aspect != 0 )
- {
- if ( vid_info.aspect != last_ar && last_ar != 0 )
- {
- hb_log( "aspect ratio changed from %g to %g",
- last_ar, vid_info.aspect );
- }
-
- if( !title->pixel_aspect_width && !title->pixel_aspect_height )
- {
- /* We don't have pixel aspect info from the source, so we're
- going to have to make a guess on the display aspect ratio. */
- switch ( (int)vid_info.aspect )
- {
- case HB_ASPECT_BASE * 4 / 3:
- ++ar4_count;
- break;
- case HB_ASPECT_BASE * 16 / 9:
- ++ar16_count;
- break;
- default:
- hb_log( "unknown aspect ratio %g", vid_info.aspect );
- /* if the aspect is closer to 4:3 use that
- * otherwise use 16:9 */
- vid_info.aspect < HB_ASPECT_BASE * 14 / 9 ? ++ar4_count :
- ++ar16_count;
- break;
- }
- }
- last_ar = vid_info.aspect;
- }
if( title->rate_base == 1126125 )
{
title->rate_base = 1126125;
}
- // start from third frame to skip opening logos
- if( i == 2)
- {
- title->crop[0] = title->crop[1] = title->height / 2;
- title->crop[2] = title->crop[3] = title->width / 2;
- }
-
while( ( buf_es = hb_list_item( list_es, 0 ) ) )
{
hb_list_rem( list_es, buf_es );
hb_log( "scan: fopen failed (%s)", filename );
}
-#define Y vid_buf->data
-#define DARK 64
-
/* Detect black borders */
- for( j = 0; j < title->width; j++ )
+#define Y vid_buf->data
+ int top, bottom, left, right;
+ int h4 = title->height / 4, w4 = title->width / 4;
+ for ( top = 2; top < h4; ++top )
{
- for( k = 2; k < title->crop[0]; k++ )
- if( Y[ k * title->width + j ] > DARK )
- {
- title->crop[0] = k;
- break;
- }
- for( k = 0; k < title->crop[1]; k++ )
- if( Y[ ( title->height - k - 1 ) *
- title->width + j ] > DARK )
- {
- title->crop[1] = k;
- break;
- }
+ if ( ! row_all_dark( title, Y, top ) )
+ break;
}
- for( j = 0; j < title->height; j++ )
+ if ( top < 4 )
{
- for( k = 0; k < title->crop[2]; k++ )
- if( Y[ j * title->width + k ] > DARK )
- {
- title->crop[2] = k;
- break;
- }
- for( k = 0; k < title->crop[3]; k++ )
- if( Y[ j * title->width +
- title->width - k - 1 ] > DARK )
- {
- title->crop[3] = k;
- break;
- }
+ // we started at row two to avoid the "line 19" noise that shows
+ // up on row 0 & 1 of some TV shows. Since we stopped before row 4
+ // check if row 0 & 1 are dark or if we shouldn't crop the top at all.
+ if ( row_all_dark( title, Y, 0 ) )
+ {
+ top = row_all_dark( title, Y, 1 )? top : 1;
+ }
+ else
+ {
+ top = 0;
+ }
+ }
+ for ( bottom = 0; bottom < h4; ++bottom )
+ {
+ if ( ! row_all_dark( title, Y, title->height - 1 - bottom ) )
+ break;
+ }
+ for ( left = 0; left < w4; ++left )
+ {
+ if ( ! column_all_dark( title, Y, top, left ) )
+ break;
+ }
+ for ( right = 0; right < w4; ++right )
+ {
+ if ( ! column_all_dark( title, Y, top, title->width - 1 - right ) )
+ break;
+ }
+
+ // only record the result if all the crops are less than a quarter of
+ // the frame otherwise we can get fooled by frames with a lot of black
+ // like titles, credits & fade-thru-black transitions.
+ if ( top < h4 && bottom < h4 && left < w4 && right < w4 )
+ {
+ record_crop( crops, top, bottom, left, right );
}
++npreviews;
if ( vid_buf )
hb_buffer_close( &vid_buf );
}
-
- if( title->pixel_aspect_width && title->pixel_aspect_width )
- {
- title->aspect = ( (double)title->pixel_aspect_width *
- (double)title->width /
- (double)title->pixel_aspect_height /
- (double)title->height + 0.05 ) * HB_ASPECT_BASE;
- }
- else
+
+ if ( npreviews )
{
- /* if we found mostly 4:3 previews use that as the aspect ratio otherwise
- use 16:9 */
- title->aspect = ar4_count > ar16_count ?
- HB_ASPECT_BASE * 4 / 3 : HB_ASPECT_BASE * 16 / 9;
- }
+ // use the most common frame info for our final title dimensions
+ hb_work_info_t vid_info;
+ most_common_info( info_list, &vid_info );
- title->crop[0] = EVEN( title->crop[0] );
- title->crop[1] = EVEN( title->crop[1] );
- title->crop[2] = EVEN( title->crop[2] );
- title->crop[3] = EVEN( title->crop[3] );
+ title->width = vid_info.width;
+ title->height = vid_info.height;
+ title->pixel_aspect_width = vid_info.pixel_aspect_width;
+ title->pixel_aspect_height = vid_info.pixel_aspect_height;
- hb_log( "scan: %d previews, %dx%d, %.3f fps, autocrop = %d/%d/%d/%d, aspect %.2f",
- npreviews, title->width, title->height, (float) title->rate /
- (float) title->rate_base, title->crop[0], title->crop[1],
- title->crop[2], title->crop[3], (float)title->aspect/(float)HB_ASPECT_BASE);
+ // compute the aspect ratio based on the storage dimensions and the
+ // pixel aspect ratio (if supplied) or just storage dimensions if no PAR.
+ title->aspect = ( (double)title->width / (double)title->height + 0.05 ) *
+ HB_ASPECT_BASE;
- if( interlaced_preview_count >= ( npreviews / 2 ) )
- {
- hb_log("Title is likely interlaced or telecined (%i out of %i previews). You should do something about that.",
- interlaced_preview_count, npreviews);
- title->detected_interlacing = 1;
- }
- else
- {
- title->detected_interlacing = 0;
+ double aspect = (double)title->width / (double)title->height;
+ if( title->pixel_aspect_width && title->pixel_aspect_height )
+ {
+ aspect *= (double)title->pixel_aspect_width /
+ (double)title->pixel_aspect_height;
+ }
+ title->aspect = ( aspect + 0.05 ) * HB_ASPECT_BASE;
+
+ if ( crops->n )
+ {
+ sort_crops( crops );
+ // The next line selects median cropping - at least
+ // 50% of the frames will have their borders removed.
+ // Other possible choices are loose cropping (i = 0) where
+ // no non-black pixels will be cropped from any frame and a
+ // tight cropping (i = crops->n - (crops->n >> 2)) where at
+ // least 75% of the frames will have their borders removed.
+ i = crops->n >> 1;
+ title->crop[0] = EVEN( crops->t[i] );
+ title->crop[1] = EVEN( crops->b[i] );
+ title->crop[2] = EVEN( crops->l[i] );
+ title->crop[3] = EVEN( crops->r[i] );
+ }
+ free( crops );
+
+ hb_log( "scan: %d previews, %dx%d, %.3f fps, autocrop = %d/%d/%d/%d, "
+ "aspect %s, PAR %d:%d",
+ npreviews, title->width, title->height, (float) title->rate /
+ (float) title->rate_base,
+ title->crop[0], title->crop[1], title->crop[2], title->crop[3],
+ aspect_to_string( title->aspect ), title->pixel_aspect_width,
+ title->pixel_aspect_height );
+
+ if( interlaced_preview_count >= ( npreviews / 2 ) )
+ {
+ hb_log("Title is likely interlaced or telecined (%i out of %i previews). You should do something about that.",
+ interlaced_preview_count, npreviews);
+ title->detected_interlacing = 1;
+ }
+ else
+ {
+ title->detected_interlacing = 0;
+ }
}
hb_buffer_close( &buf_ps );
OSDN Git Service
