#include "config.h"
#include "mlt_frame.h"
+#include "mlt_producer.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-typedef struct
-{
- mlt_image_format vfmt;
- int width;
- int height;
- uint8_t *image;
- uint8_t *alpha;
- mlt_audio_format afmt;
- int16_t *audio;
-}
-frame_test;
-
-static frame_test test_card = { mlt_image_none, 0, 0, NULL, NULL, mlt_audio_none, NULL };
-
/** Constructor for a frame.
*/
if ( this != NULL )
{
+ // Get the normalisation
+ char *normalisation = getenv( "MLT_NORMALISATION" );
+
// Initialise the properties
mlt_properties properties = &this->parent;
mlt_properties_init( properties, this );
// Set default properties on the frame
- mlt_properties_set_timecode( properties, "timecode", 0.0 );
+ mlt_properties_set_position( properties, "_position", 0.0 );
mlt_properties_set_data( properties, "image", NULL, 0, NULL, NULL );
- mlt_properties_set_int( properties, "width", 720 );
- mlt_properties_set_int( properties, "height", 576 );
+
+ if ( normalisation == NULL || strcmp( normalisation, "NTSC" ) )
+ {
+ mlt_properties_set_int( properties, "width", 720 );
+ mlt_properties_set_int( properties, "height", 576 );
+ mlt_properties_set_int( properties, "normalised_width", 720 );
+ mlt_properties_set_int( properties, "normalised_height", 576 );
+ }
+ else
+ {
+ mlt_properties_set_int( properties, "width", 720 );
+ mlt_properties_set_int( properties, "height", 480 );
+ mlt_properties_set_int( properties, "normalised_width", 720 );
+ mlt_properties_set_int( properties, "normalised_height", 480 );
+ }
+
mlt_properties_set_double( properties, "aspect_ratio", 4.0 / 3.0 );
mlt_properties_set_data( properties, "audio", NULL, 0, NULL, NULL );
mlt_properties_set_data( properties, "alpha", NULL, 0, NULL, NULL );
+
+
}
return this;
}
int mlt_frame_is_test_card( mlt_frame this )
{
- return this->stack_get_image_size == 0;
+ return mlt_properties_get_int( mlt_frame_properties( this ), "test_image" );
+}
+
+/** Check if we have a way to derive something than test audio.
+*/
+
+int mlt_frame_is_test_audio( mlt_frame this )
+{
+ return this->get_audio == NULL || mlt_properties_get_int( mlt_frame_properties( this ), "test_audio" );
}
/** Get the aspect ratio of the frame.
double mlt_frame_get_aspect_ratio( mlt_frame this )
{
- mlt_properties properties = mlt_frame_properties( this );
- return mlt_properties_get_double( properties, "aspect_ratio" );
+ return mlt_properties_get_double( mlt_frame_properties( this ), "aspect_ratio" );
}
/** Set the aspect ratio of the frame.
int mlt_frame_set_aspect_ratio( mlt_frame this, double value )
{
- mlt_properties properties = mlt_frame_properties( this );
- return mlt_properties_set_double( properties, "aspect_ratio", value );
+ return mlt_properties_set_double( mlt_frame_properties( this ), "aspect_ratio", value );
}
-/** Get the timecode of this frame.
+/** Get the position of this frame.
*/
-mlt_timecode mlt_frame_get_timecode( mlt_frame this )
+mlt_position mlt_frame_get_position( mlt_frame this )
{
- mlt_properties properties = mlt_frame_properties( this );
- return mlt_properties_get_timecode( properties, "timecode" );
+ return mlt_properties_get_position( mlt_frame_properties( this ), "_position" );
}
-/** Set the timecode of this frame.
+/** Set the position of this frame.
*/
-int mlt_frame_set_timecode( mlt_frame this, mlt_timecode value )
+int mlt_frame_set_position( mlt_frame this, mlt_position value )
{
- mlt_properties properties = mlt_frame_properties( this );
- return mlt_properties_set_timecode( properties, "timecode", value );
+ return mlt_properties_set_position( mlt_frame_properties( this ), "_position", value );
}
/** Stack a get_image callback.
{
mlt_properties properties = mlt_frame_properties( this );
mlt_get_image get_image = mlt_frame_pop_get_image( this );
+ mlt_producer producer = mlt_properties_get_data( properties, "test_card_producer", NULL );
if ( get_image != NULL )
{
*width = mlt_properties_get_int( properties, "width" );
*height = mlt_properties_get_int( properties, "height" );
}
+ else if ( producer != NULL )
+ {
+ mlt_frame test_frame = NULL;
+ mlt_service_get_frame( mlt_producer_service( producer ), &test_frame, 0 );
+ if ( test_frame != NULL )
+ {
+ mlt_properties test_properties = mlt_frame_properties( test_frame );
+ mlt_properties_set_double( test_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "consumer_aspect_ratio" ) );
+ mlt_properties_set_double( test_properties, "consumer_scale", mlt_properties_get_double( properties, "consumer_scale" ) );
+ mlt_properties_set( test_properties, "rescale.interp", "nearest" );
+ mlt_frame_get_image( test_frame, buffer, format, width, height, writable );
+ mlt_properties_set_data( properties, "test_card_frame", test_frame, 0, ( mlt_destructor )mlt_frame_close, NULL );
+ mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
+ mlt_properties_set_int( properties, "width", *width );
+ mlt_properties_set_int( properties, "height", *height );
+ }
+ else
+ {
+ mlt_properties_set_data( properties, "test_card_producer", NULL, 0, NULL, NULL );
+ mlt_frame_get_image( this, buffer, format, width, height, writable );
+ }
+ }
else
{
- if ( test_card.vfmt != *format )
+ uint8_t *p;
+ uint8_t *q;
+ int size = 0;
+
+ *width = *width == 0 ? 720 : *width;
+ *height = *height == 0 ? 576 : *height;
+ size = *width * *height;
+
+ mlt_properties_set_int( properties, "width", *width );
+ mlt_properties_set_int( properties, "height", *height );
+
+ switch( *format )
{
- uint8_t *p;
- uint8_t *q;
-
- test_card.vfmt = *format;
- test_card.width = 720;
- test_card.height = 576;
-
- switch( *format )
- {
- case mlt_image_none:
- break;
- case mlt_image_rgb24:
- test_card.image = realloc( test_card.image, test_card.width * test_card.height * 3 );
- memset( test_card.image, 255, test_card.width * test_card.height * 3 );
- break;
- case mlt_image_rgb24a:
- test_card.image = realloc( test_card.image, test_card.width * test_card.height * 4 );
- memset( test_card.image, 255, test_card.width * test_card.height * 4 );
- break;
- case mlt_image_yuv422:
- test_card.image = realloc( test_card.image, test_card.width * test_card.height * 2 );
- p = test_card.image;
- q = test_card.image + test_card.width * test_card.height * 2;
- while ( p != q )
- {
- *p ++ = 255;
- *p ++ = 128;
- }
- break;
- case mlt_image_yuv420p:
- test_card.image = realloc( test_card.image, test_card.width * test_card.height * 3 / 2 );
- memset( test_card.image, 255, test_card.width * test_card.height * 3 / 2 );
- break;
- }
+ case mlt_image_none:
+ size = 0;
+ *buffer = NULL;
+ break;
+ case mlt_image_rgb24:
+ size *= 3;
+ size += *width * 3;
+ *buffer = mlt_pool_alloc( size );
+ if ( *buffer )
+ memset( *buffer, 255, size );
+ break;
+ case mlt_image_rgb24a:
+ size *= 4;
+ size += *width * 4;
+ *buffer = mlt_pool_alloc( size );
+ if ( *buffer )
+ memset( *buffer, 255, size );
+ break;
+ case mlt_image_yuv422:
+ size *= 2;
+ size += *width * 2;
+ *buffer = mlt_pool_alloc( size );
+ p = *buffer;
+ q = p + size;
+ while ( p != NULL && p != q )
+ {
+ *p ++ = 255;
+ *p ++ = 128;
+ }
+ break;
+ case mlt_image_yuv420p:
+ size = size * 3 / 2;
+ *buffer = mlt_pool_alloc( size );
+ if ( *buffer )
+ memset( *buffer, 255, size );
+ break;
}
- *width = test_card.width;
- *height = test_card.height;
- *buffer = test_card.image;
+ mlt_properties_set_data( properties, "image", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
+ mlt_properties_set_int( properties, "test_image", 1 );
}
return 0;
{
if ( this->get_alpha_mask != NULL )
return this->get_alpha_mask( this );
- return test_card.alpha;
+ return NULL;
}
int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
{
+ mlt_properties properties = mlt_frame_properties( this );
+
if ( this->get_audio != NULL )
{
return this->get_audio( this, buffer, format, frequency, channels, samples );
}
else
{
- if ( test_card.afmt != *format )
- {
- test_card.afmt = *format;
- test_card.audio = realloc( test_card.audio, 1920 * 2 * sizeof( int16_t ) );
- memset( test_card.audio, 0, 1920 * 2 * sizeof( int16_t ) );
- }
-
- *buffer = test_card.audio;
- *frequency = 48000;
- *channels = 2;
- *samples = 1920;
+ int size = 0;
+ *samples = *samples <= 0 ? 1920 : *samples;
+ *channels = *channels <= 0 ? 2 : *channels;
+ *frequency = *frequency <= 0 ? 48000 : *frequency;
+ size = *samples * *channels * sizeof( int16_t );
+ *buffer = mlt_pool_alloc( size );
+ if ( *buffer != NULL )
+ memset( *buffer, 0, size );
+ mlt_properties_set_data( properties, "audio", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
+ mlt_properties_set_int( properties, "test_audio", 1 );
}
return 0;
}
void mlt_frame_close( mlt_frame this )
{
- mlt_frame frame = mlt_frame_pop_frame( this );
-
- while ( frame != NULL )
- {
- mlt_frame_close( frame);
- frame = mlt_frame_pop_frame( this );
- }
-
mlt_properties_close( &this->parent );
-
free( this );
}
*d++ = y1;
*d++ = (v0+v1) >> 1;
}
+ if ( width % 2 )
+ {
+ r = *s++;
+ g = *s++;
+ b = *s++;
+ *alpha++ = *s++;
+ RGB2YUV (r, g, b, y0, u0 , v0);
+ *d++ = y0;
+ *d++ = u0;
+ }
}
return ret;
}
*d++ = y1;
*d++ = (v0+v1) >> 1;
}
+ if ( width % 2 )
+ {
+ r = *s++;
+ g = *s++;
+ b = *s++;
+ RGB2YUV (r, g, b, y0, u0 , v0);
+ *d++ = y0;
+ *d++ = u0;
+ }
}
return ret;
}
-int mlt_frame_composite_yuv( mlt_frame this, mlt_frame that, int x, int y, float weight )
+int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv )
{
int ret = 0;
- int x_start = 0;
- int width_src, height_src;
- int width_dest, height_dest;
- mlt_image_format format_src, format_dest;
- uint8_t *p_src, *p_dest;
- int x_end;
- int i, j;
- int stride_src;
- int stride_dest;
+ register int i, j;
+
+ int half = width >> 1;
+
+ uint8_t *Y = yuv420p;
+ uint8_t *U = Y + width * height;
+ uint8_t *V = U + width * height / 4;
+
+ register uint8_t *d = yuv;
+
+ for ( i = 0; i < height; i++ )
+ {
+ register uint8_t *u = U + ( i / 2 ) * ( half );
+ register uint8_t *v = V + ( i / 2 ) * ( half );
+
+ for ( j = 0; j < half; j++ )
+ {
+ *d ++ = *Y ++;
+ *d ++ = *u ++;
+ *d ++ = *Y ++;
+ *d ++ = *v ++;
+ }
+ }
+ return ret;
+}
+
+void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight )
+{
+ // Calculate strides
+ int istride = iwidth * 2;
+ int ostride = owidth * 2;
+
+ iwidth = iwidth - ( iwidth % 4 );
+ owidth = owidth - ( owidth % 4 );
+ iheight = iheight - ( iheight % 2 );
+ oheight = oheight - ( oheight % 2 );
+
+ // Optimisation point
+ if ( iwidth == owidth && iheight == oheight )
+ memcpy( output, input, iheight * istride );
+
+ // Coordinates (0,0 is middle of output)
+ int y;
+
+ // Calculate ranges
+ int out_x_range = owidth / 2;
+ int out_y_range = oheight / 2;
+ int in_x_range = iwidth / 2 < out_x_range ? iwidth / 2 : out_x_range;
+ int in_y_range = iheight / 2 < out_y_range ? iheight / 2 : out_y_range;
+
+ // Output pointers
+ uint8_t *out_line = output;
+ uint8_t *out_ptr = out_line;
+
+ // Calculate a middle and possibly invalid pointer in the input
+ uint8_t *in_middle = input + istride * ( iheight / 2 ) + ( iwidth / 2 ) * 2;
+ int in_line = - in_y_range * istride - in_x_range * 2;
+
+ int elements;
+
+ // Fill whole section with black
+ y = out_y_range - ( iheight / 2 );
+ int blank_elements = ostride * y / 2;
+ elements = blank_elements;
+ while ( elements -- )
+ {
+ *out_line ++ = 0;
+ *out_line ++ = 128;
+ }
- format_src = mlt_image_yuv422;
- format_dest = mlt_image_yuv422;
+ int active_width = 2 * iwidth;
+ int inactive_width = out_x_range - in_x_range;
+
+ // Loop for the entirety of our output height.
+ while ( iheight -- )
+ {
+ // Start at the beginning of the line
+ out_ptr = out_line;
+
+ // Fill the outer part with black
+ elements = inactive_width;
+ while ( elements -- )
+ {
+ *out_ptr ++ = 0;
+ *out_ptr ++ = 128;
+ }
+
+ // We're in the input range for this row.
+ memcpy( out_ptr, in_middle + in_line, active_width );
+ out_ptr += active_width;
+
+ // Fill the outer part with black
+ elements = inactive_width;
+ while ( elements -- )
+ {
+ *out_ptr ++ = 0;
+ *out_ptr ++ = 128;
+ }
+
+ // Move to next input line
+ in_line += istride;
+
+ // Move to next output line
+ out_line += ostride;
+ }
+
+ // Fill whole section with black
+ elements = blank_elements;
+ while ( elements -- )
+ {
+ *out_line ++ = 0;
+ *out_line ++ = 128;
+ }
+}
+
+/** A resizing function for yuv422 frames - this does not rescale, but simply
+ resizes. It assumes yuv422 images available on the frame so use with care.
+*/
+
+uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight )
+{
+ // Get properties
+ mlt_properties properties = mlt_frame_properties( this );
+
+ // Get the input image, width and height
+ uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
+ int iwidth = mlt_properties_get_int( properties, "width" );
+ int iheight = mlt_properties_get_int( properties, "height" );
+
+ // If width and height are correct, don't do anything
+ if ( iwidth != owidth || iheight != oheight )
+ {
+ // Create the output image
+ uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
+
+ // Call the generic resize
+ mlt_resize_yuv422( output, owidth, oheight, input, iwidth, iheight );
+
+ // Now update the frame
+ mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
+ mlt_properties_set_int( properties, "width", owidth );
+ mlt_properties_set_int( properties, "height", oheight );
+
+ // Return the output
+ return output;
+ }
+ // No change, return input
+ return input;
+}
+
+/** A rescaling function for yuv422 frames - low quality, and provided for testing
+ only. It assumes yuv422 images available on the frame so use with care.
+*/
+
+uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
+{
+ // Get properties
+ mlt_properties properties = mlt_frame_properties( this );
+
+ // Get the input image, width and height
+ uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
+ int iwidth = mlt_properties_get_int( properties, "width" );
+ int iheight = mlt_properties_get_int( properties, "height" );
+
+ // If width and height are correct, don't do anything
+ if ( iwidth != owidth || iheight != oheight )
+ {
+ // Create the output image
+ uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * 2 );
+
+ // Calculate strides
+ int istride = iwidth * 2;
+ int ostride = owidth * 2;
+
+ iwidth = iwidth - ( iwidth % 4 );
+
+ // Coordinates (0,0 is middle of output)
+ int y, x;
+
+ // Derived coordinates
+ int dy, dx;
+
+ // Calculate ranges
+ int out_x_range = owidth / 2;
+ int out_y_range = oheight / 2;
+ int in_x_range = iwidth / 2;
+ int in_y_range = iheight / 2;
+
+ // Output pointers
+ uint8_t *out_line = output;
+ uint8_t *out_ptr;
+
+ // Calculate a middle pointer
+ uint8_t *in_middle = input + istride * in_y_range + in_x_range * 2;
+ uint8_t *in_line;
+ uint8_t *in_ptr;
+
+ // Generate the affine transform scaling values
+ int scale_width = ( iwidth << 16 ) / owidth;
+ int scale_height = ( iheight << 16 ) / oheight;
+
+ // Loop for the entirety of our output height.
+ for ( y = - out_y_range; y < out_y_range ; y ++ )
+ {
+ // Calculate the derived y value
+ dy = ( scale_height * y ) >> 16;
+
+ // Start at the beginning of the line
+ out_ptr = out_line;
- mlt_frame_get_image( this, &p_dest, &format_dest, &width_dest, &height_dest, 1 /* writable */ );
- mlt_frame_get_image( that, &p_src, &format_src, &width_src, &height_src, 0 /* writable */ );
+ // Pointer to the middle of the input line
+ in_line = in_middle + dy * istride;
- x_end = width_src;
+ // Loop for the entirety of our output row.
+ for ( x = - out_x_range; x < out_x_range; x += 1 )
+ {
+ // Calculated the derived x
+ dx = ( scale_width * x ) >> 16;
+
+ // We're in the input range for this row.
+ in_ptr = in_line + ( dx << 1 );
+ *out_ptr ++ = *in_ptr ++;
+ in_ptr = in_line + ( ( dx >> 1 ) << 2 ) + ( ( x & 1 ) << 1 ) + 1;
+ *out_ptr ++ = *in_ptr;
+ }
+
+ // Move to next output line
+ out_line += ostride;
+ }
+
+ // Now update the frame
+ mlt_properties_set_data( properties, "image", output, owidth * ( oheight + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
+ mlt_properties_set_int( properties, "width", owidth );
+ mlt_properties_set_int( properties, "height", oheight );
+
+ // Return the output
+ return output;
+ }
+
+ // No change, return input
+ return input;
+}
+
+int mlt_frame_mix_audio( mlt_frame this, mlt_frame that, float weight_start, float weight_end, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
+{
+ int ret = 0;
+ int16_t *p_src, *p_dest;
+ int16_t *src, *dest;
+ //static int16_t *extra_src = NULL, *extra_dest = NULL;
+ static int extra_src_samples = 0, extra_dest_samples = 0;
+ int frequency_src = *frequency, frequency_dest = *frequency;
+ int channels_src = *channels, channels_dest = *channels;
+ int samples_src = *samples, samples_dest = *samples;
+ int i, j;
+ double d = 0, s = 0;
+
+ mlt_frame_get_audio( this, &p_dest, format, &frequency_dest, &channels_dest, &samples_dest );
+ //fprintf( stderr, "mix: frame dest samples %d channels %d position %lld\n", samples_dest, channels_dest, mlt_properties_get_position( mlt_frame_properties( this ), "_position" ) );
+ mlt_frame_get_audio( that, &p_src, format, &frequency_src, &channels_src, &samples_src );
+ //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_src );
+ src = p_src;
+ dest = p_dest;
+ if ( channels_src > 6 )
+ channels_src = 0;
+ if ( channels_dest > 6 )
+ channels_dest = 0;
+ if ( samples_src > 4000 )
+ samples_src = 0;
+ if ( samples_dest > 4000 )
+ samples_dest = 0;
+
+#if 0
+ // Append new samples to leftovers
+ if ( extra_dest_samples > 0 )
+ {
+ fprintf( stderr, "prepending %d samples to dest\n", extra_dest_samples );
+ dest = realloc( extra_dest, ( samples_dest + extra_dest_samples ) * 2 * channels_dest );
+ memcpy( &extra_dest[ extra_dest_samples * channels_dest ], p_dest, samples_dest * 2 * channels_dest );
+ }
+ else
+ dest = p_dest;
+ if ( extra_src_samples > 0 )
+ {
+ fprintf( stderr, "prepending %d samples to src\n", extra_src_samples );
+ src = realloc( extra_src, ( samples_src + extra_src_samples ) * 2 * channels_src );
+ memcpy( &extra_src[ extra_src_samples * channels_src ], p_src, samples_src * 2 * channels_src );
+ }
+ else
+ src = p_src;
+#endif
+
+ // determine number of samples to process
+ if ( samples_src + extra_src_samples < samples_dest + extra_dest_samples )
+ *samples = samples_src + extra_src_samples;
+ else if ( samples_dest + extra_dest_samples < samples_src + extra_src_samples )
+ *samples = samples_dest + extra_dest_samples;
- stride_src = width_src * 2;
- stride_dest = width_dest * 2;
- uint8_t *lower = p_dest;
- uint8_t *upper = p_dest + height_dest * stride_dest;
+ *channels = channels_src < channels_dest ? channels_src : channels_dest;
+ *buffer = p_dest;
+ *frequency = frequency_dest;
- p_dest += ( y * stride_dest ) + ( x * 2 );
+ // Compute a smooth ramp over start to end
+ float weight = weight_start;
+ float weight_step = ( weight_end - weight_start ) / *samples;
- if ( x < 0 )
+ // Mixdown
+ for ( i = 0; i < *samples; i++ )
+ {
+ for ( j = 0; j < *channels; j++ )
+ {
+ if ( j < channels_dest )
+ d = (double) dest[ i * channels_dest + j ];
+ if ( j < channels_src )
+ s = (double) src[ i * channels_src + j ];
+ dest[ i * channels_dest + j ] = s * weight + d * ( 1.0 - weight );
+ }
+ weight += weight_step;
+ }
+
+ // We have to copy --sigh
+ if ( dest != p_dest )
+ memcpy( p_dest, dest, *samples * 2 * *channels );
+
+#if 0
+ // Store the leftovers
+ if ( samples_src + extra_src_samples < samples_dest + extra_dest_samples )
+ {
+ extra_dest_samples = ( samples_dest + extra_dest_samples ) - ( samples_src + extra_src_samples );
+ size_t size = extra_dest_samples * 2 * channels_dest;
+ fprintf( stderr, "storing %d samples from dest\n", extra_dest_samples );
+ if ( extra_dest )
+ free( extra_dest );
+ extra_dest = malloc( size );
+ if ( extra_dest )
+ memcpy( extra_dest, &p_dest[ ( samples_dest - extra_dest_samples - 1 ) * channels_dest ], size );
+ else
+ extra_dest_samples = 0;
+ }
+ else if ( samples_dest + extra_dest_samples < samples_src + extra_src_samples )
{
- x_start = -x;
- x_end += x_start;
+ extra_src_samples = ( samples_src + extra_src_samples ) - ( samples_dest + extra_dest_samples );
+ size_t size = extra_src_samples * 2 * channels_src;
+ fprintf( stderr, "storing %d samples from src\n", extra_dest_samples );
+ if ( extra_src )
+ free( extra_src );
+ extra_src = malloc( size );
+ if ( extra_src )
+ memcpy( extra_src, &p_src[ ( samples_src - extra_src_samples - 1 ) * channels_src ], size );
+ else
+ extra_src_samples = 0;
}
+#endif
+
+ return ret;
+}
- uint8_t *z = mlt_frame_get_alpha_mask( that );
+int mlt_sample_calculator( float fps, int frequency, int64_t position )
+{
+ int samples = 0;
- for ( i = 0; i < height_src; i++ )
+ if ( fps > 29 && fps <= 30 )
{
- uint8_t *p = p_src;
- uint8_t *q = p_dest;
- uint8_t *o = p_dest;
+ samples = frequency / 30;
- for ( j = 0; j < width_src; j ++ )
+ switch ( frequency )
{
- if ( q >= lower && q < upper && j >= x_start && j < x_end )
- {
- uint8_t y = *p ++;
- uint8_t uv = *p ++;
- uint8_t a = ( z == NULL ) ? 255 : *z ++;
- float value = ( weight * ( float ) a / 255.0 );
- *o ++ = (uint8_t)( y * value + *q++ * ( 1 - value ) );
- *o ++ = (uint8_t)( uv * value + *q++ * ( 1 - value ) );
- }
- else
- {
- p += 2;
- o += 2;
- q += 2;
- if ( z != NULL )
- z += 1;
- }
+ case 48000:
+ if ( position % 5 != 0 )
+ samples += 2;
+ break;
+ case 44100:
+ if ( position % 300 == 0 )
+ samples = 1471;
+ else if ( position % 30 == 0 )
+ samples = 1470;
+ else if ( position % 2 == 0 )
+ samples = 1472;
+ else
+ samples = 1471;
+ break;
+ case 32000:
+ if ( position % 30 == 0 )
+ samples = 1068;
+ else if ( position % 29 == 0 )
+ samples = 1067;
+ else if ( position % 4 == 2 )
+ samples = 1067;
+ else
+ samples = 1068;
+ break;
+ default:
+ samples = 0;
}
-
- p_src += stride_src;
- p_dest += stride_dest;
+ }
+ else if ( fps != 0 )
+ {
+ samples = frequency / fps;
}
- return ret;
+ return samples;
}