X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmodules%2Fcore%2Ftransition_composite.c;h=2d4535cb6af0f5b7581d61113605fe4d9153d416;hb=facc6328e46eb0c973c6293390a14258abf071d4;hp=7bcdfa9fbcdd80a3126c63d72ec58a5393bb28b5;hpb=bcc23ff73c82655a8cec6603112b9ff54c2ca3d6;p=mlt diff --git a/src/modules/core/transition_composite.c b/src/modules/core/transition_composite.c index 7bcdfa9f..9b9eada2 100644 --- a/src/modules/core/transition_composite.c +++ b/src/modules/core/transition_composite.c @@ -3,73 +3,1294 @@ * Copyright (C) 2003-2004 Ushodaya Enterprises Limited * Author: Dan Dennedy * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. * - * This program is distributed in the hope that it will be useful, + * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software Foundation, - * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "transition_composite.h" -#include +#include #include #include +#include +#include +#include -/** Composition class. +typedef void ( *composite_line_fn )( uint8_t *dest, uint8_t *src, int width_src, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int softness, uint32_t step ); + +/** Geometry struct. +*/ + +struct geometry_s +{ + struct mlt_geometry_item_s item; + int nw; // normalised width + int nh; // normalised height + int sw; // scaled width, not including consumer scale based upon w/nw + int sh; // scaled height, not including consumer scale based upon h/nh + int halign; // horizontal alignment: 0=left, 1=center, 2=right + int valign; // vertical alignment: 0=top, 1=middle, 2=bottom + int x_src; + int y_src; +}; + +/** Parse the alignment properties into the geometry. */ -typedef struct +static int alignment_parse( char* align ) { - struct mlt_transition_s parent; + int ret = 0; + + if ( align == NULL ); + else if ( isdigit( align[ 0 ] ) ) + ret = atoi( align ); + else if ( align[ 0 ] == 'c' || align[ 0 ] == 'm' ) + ret = 1; + else if ( align[ 0 ] == 'r' || align[ 0 ] == 'b' ) + ret = 2; + + return ret; } -transition_composite; -/** Get the image. +/** Calculate real geometry. */ -static int transition_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ) +static void geometry_calculate( mlt_transition self, struct geometry_s *output, double position ) { - // Get the properties of the a frame - mlt_properties a_props = mlt_frame_properties( this ); + mlt_properties properties = MLT_TRANSITION_PROPERTIES( self ); + mlt_geometry geometry = mlt_properties_get_data( properties, "geometries", NULL ); + int mirror_off = mlt_properties_get_int( properties, "mirror_off" ); + int repeat_off = mlt_properties_get_int( properties, "repeat_off" ); + int length = mlt_geometry_get_length( geometry ); - // Get the b frame from the stack - mlt_frame b_frame = mlt_frame_pop_frame( this ); + // Allow wrapping + if ( !repeat_off && position >= length && length != 0 ) + { + int section = position / length; + position -= section * length; + if ( !mirror_off && section % 2 == 1 ) + position = length - position; + } + + // Fetch the key for the position + mlt_geometry_fetch( geometry, &output->item, position ); +} + +static mlt_geometry transition_parse_keys( mlt_transition self, int normalised_width, int normalised_height ) +{ + // Loop variable for property interrogation + int i = 0; + + // Get the properties of the transition + mlt_properties properties = MLT_TRANSITION_PROPERTIES( self ); + + // Create an empty geometries object + mlt_geometry geometry = mlt_geometry_init( ); + + // Get the duration + mlt_position length = mlt_transition_get_length( self ); + double cycle = mlt_properties_get_double( properties, "cycle" ); + + // Get the new style geometry string + char *property = mlt_properties_get( properties, "geometry" ); + + // Allow a geometry repeat cycle + if ( cycle >= 1 ) + length = cycle; + else if ( cycle > 0 ) + length *= cycle; + + // Parse the geometry if we have one + mlt_geometry_parse( geometry, property, length, normalised_width, normalised_height ); + + // Check if we're using the old style geometry + if ( property == NULL ) + { + // DEPRECATED: Multiple keys for geometry information is inefficient and too rigid for + // practical use - while deprecated, it has been slightly extended too - keys can now + // be specified out of order, and can be blanked or NULL to simulate removal + + // Structure to use for parsing and inserting + struct mlt_geometry_item_s item; + + // Parse the start property + item.frame = 0; + if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "start" ) ) == 0 ) + mlt_geometry_insert( geometry, &item ); + + // Parse the keys in between + for ( i = 0; i < mlt_properties_count( properties ); i ++ ) + { + // Get the name of the property + char *name = mlt_properties_get_name( properties, i ); + + // Check that it's valid + if ( !strncmp( name, "key[", 4 ) ) + { + // Get the value of the property + char *value = mlt_properties_get_value( properties, i ); + + // Determine the frame number + item.frame = atoi( name + 4 ); + + // Parse and add to the list + if ( mlt_geometry_parse_item( geometry, &item, value ) == 0 ) + mlt_geometry_insert( geometry, &item ); + else + fprintf( stderr, "Invalid Key - skipping %s = %s\n", name, value ); + } + } + + // Parse the end + item.frame = -1; + if ( mlt_geometry_parse_item( geometry, &item, mlt_properties_get( properties, "end" ) ) == 0 ) + mlt_geometry_insert( geometry, &item ); + mlt_geometry_interpolate( geometry ); + } + + return geometry; +} + +/** Adjust position according to scaled size and alignment properties. +*/ + +static void alignment_calculate( struct geometry_s *geometry ) +{ + geometry->item.x += ( geometry->item.w - geometry->sw ) * geometry->halign / 2; + geometry->item.y += ( geometry->item.h - geometry->sh ) * geometry->valign / 2; +} + +/** Calculate the position for this frame. +*/ + +static int position_calculate( mlt_transition self, mlt_position position ) +{ + // Get the in and out position + mlt_position in = mlt_transition_get_in( self ); + + // Now do the calcs + return position - in; +} + +/** Calculate the field delta for this frame - position between two frames. +*/ + +static int get_value( mlt_properties properties, const char *preferred, const char *fallback ) +{ + int value = mlt_properties_get_int( properties, preferred ); + if ( value == 0 ) + value = mlt_properties_get_int( properties, fallback ); + return value; +} + +/** A linear threshold determination function. +*/ + +static inline int32_t linearstep( int32_t edge1, int32_t edge2, int32_t a ) +{ + if ( a < edge1 ) + return 0; + + if ( a >= edge2 ) + return 0x10000; + + return ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 ); +} + +/** A smoother, non-linear threshold determination function. +*/ + +static inline int32_t smoothstep( int32_t edge1, int32_t edge2, uint32_t a ) +{ + if ( a < edge1 ) + return 0; + + if ( a >= edge2 ) + return 0x10000; + + a = ( ( a - edge1 ) << 16 ) / ( edge2 - edge1 ); + + return ( ( ( a * a ) >> 16 ) * ( ( 3 << 16 ) - ( 2 * a ) ) ) >> 16; +} + +/** Load the luma map from PGM stream. +*/ + +static void luma_read_pgm( FILE *f, uint16_t **map, int *width, int *height ) +{ + uint8_t *data = NULL; + while (1) + { + char line[128]; + char comment[128]; + int i = 2; + int maxval; + int bpp; + uint16_t *p; + + line[127] = '\0'; + + // get the magic code + if ( fgets( line, 127, f ) == NULL ) + break; + + // skip comments + while ( sscanf( line, " #%s", comment ) > 0 ) + if ( fgets( line, 127, f ) == NULL ) + break; + + if ( line[0] != 'P' || line[1] != '5' ) + break; + + // skip white space and see if a new line must be fetched + for ( i = 2; i < 127 && line[i] != '\0' && isspace( line[i] ); i++ ); + if ( ( line[i] == '\0' || line[i] == '#' ) && fgets( line, 127, f ) == NULL ) + break; + + // skip comments + while ( sscanf( line, " #%s", comment ) > 0 ) + if ( fgets( line, 127, f ) == NULL ) + break; + + // get the dimensions + if ( line[0] == 'P' ) + i = sscanf( line, "P5 %d %d %d", width, height, &maxval ); + else + i = sscanf( line, "%d %d %d", width, height, &maxval ); + + // get the height value, if not yet + if ( i < 2 ) + { + if ( fgets( line, 127, f ) == NULL ) + break; + + // skip comments + while ( sscanf( line, " #%s", comment ) > 0 ) + if ( fgets( line, 127, f ) == NULL ) + break; + + i = sscanf( line, "%d", height ); + if ( i == 0 ) + break; + else + i = 2; + } + + // get the maximum gray value, if not yet + if ( i < 3 ) + { + if ( fgets( line, 127, f ) == NULL ) + break; + + // skip comments + while ( sscanf( line, " #%s", comment ) > 0 ) + if ( fgets( line, 127, f ) == NULL ) + break; + + i = sscanf( line, "%d", &maxval ); + if ( i == 0 ) + break; + } + + // determine if this is one or two bytes per pixel + bpp = maxval > 255 ? 2 : 1; + + // allocate temporary storage for the raw data + data = mlt_pool_alloc( *width * *height * bpp ); + if ( data == NULL ) + break; + + // read the raw data + if ( fread( data, *width * *height * bpp, 1, f ) != 1 ) + break; + + // allocate the luma bitmap + *map = p = (uint16_t*)mlt_pool_alloc( *width * *height * sizeof( uint16_t ) ); + if ( *map == NULL ) + break; + + // proces the raw data into the luma bitmap + for ( i = 0; i < *width * *height * bpp; i += bpp ) + { + if ( bpp == 1 ) + *p++ = data[ i ] << 8; + else + *p++ = ( data[ i ] << 8 ) + data[ i + 1 ]; + } + + break; + } + + if ( data != NULL ) + mlt_pool_release( data ); +} + +/** Generate a luma map from any YUV image. +*/ + +static void luma_read_yuv422( uint8_t *image, uint16_t **map, int width, int height ) +{ + int i; + + // allocate the luma bitmap + uint16_t *p = *map = ( uint16_t* )mlt_pool_alloc( width * height * sizeof( uint16_t ) ); + if ( *map == NULL ) + return; + + // proces the image data into the luma bitmap + for ( i = 0; i < width * height * 2; i += 2 ) + *p++ = ( image[ i ] - 16 ) * 299; // 299 = 65535 / 219 +} + +static inline int calculate_mix( uint16_t *luma, int j, int softness, int weight, int alpha, uint32_t step ) +{ + return ( ( luma ? smoothstep( luma[ j ], luma[ j ] + softness, step ) : weight ) * ( alpha + 1 ) ) >> 8; +} + +static inline uint8_t sample_mix( uint8_t dest, uint8_t src, int mix ) +{ + return ( src * mix + dest * ( ( 1 << 16 ) - mix ) ) >> 16; +} + +/** Composite a source line over a destination line +*/ +#if defined(USE_SSE) && defined(ARCH_X86_64) +void composite_line_yuv_sse2_simple(uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight); +#endif + +void composite_line_yuv( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int soft, uint32_t step ) +{ + register int j = 0; + register int mix; + +#if defined(USE_SSE) && defined(ARCH_X86_64) + if ( !luma && width > 7 ) + { + composite_line_yuv_sse2_simple(dest, src, width, alpha_b, alpha_a, weight); + j = width - width % 8; + dest += j * 2; + src += j * 2; + alpha_a += j; + alpha_b += j; + } +#endif + + for ( ; j < width; j ++ ) + { + mix = calculate_mix( luma, j, soft, weight, *alpha_b ++, step ); + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *alpha_a = ( mix >> 8 ) | *alpha_a; + alpha_a ++; + } +} + +static void composite_line_yuv_or( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int soft, uint32_t step ) +{ + register int j; + register int mix; + + for ( j = 0; j < width; j ++ ) + { + mix = calculate_mix( luma, j, soft, weight, *alpha_b ++ | *alpha_a, step ); + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *alpha_a ++ = mix >> 8; + } +} + +static void composite_line_yuv_and( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int soft, uint32_t step ) +{ + register int j; + register int mix; + + for ( j = 0; j < width; j ++ ) + { + mix = calculate_mix( luma, j, soft, weight, *alpha_b ++ & *alpha_a, step ); + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *alpha_a ++ = mix >> 8; + } +} + +static void composite_line_yuv_xor( uint8_t *dest, uint8_t *src, int width, uint8_t *alpha_b, uint8_t *alpha_a, int weight, uint16_t *luma, int soft, uint32_t step ) +{ + register int j; + register int mix; + + for ( j = 0; j < width; j ++ ) + { + mix = calculate_mix( luma, j, soft, weight, *alpha_b ++ ^ *alpha_a, step ); + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *dest = sample_mix( *dest, *src++, mix ); + dest++; + *alpha_a ++ = mix >> 8; + } +} + +/** Composite function. +*/ + +static int composite_yuv( uint8_t *p_dest, int width_dest, int height_dest, uint8_t *p_src, int width_src, int height_src, uint8_t *alpha_b, uint8_t *alpha_a, struct geometry_s geometry, int field, uint16_t *p_luma, double softness, composite_line_fn line_fn ) +{ + int ret = 0; + int i; + int x_src = -geometry.x_src, y_src = -geometry.y_src; + int uneven_x_src = ( x_src % 2 ); + int step = ( field > -1 ) ? 2 : 1; + int bpp = 2; + int stride_src = geometry.sw * bpp; + int stride_dest = width_dest * bpp; + int i_softness = ( 1 << 16 ) * softness; + int weight = ( ( 1 << 16 ) * geometry.item.mix + 50 ) / 100; + uint32_t luma_step = ( ( ( 1 << 16 ) - 1 ) * geometry.item.mix + 50 ) / 100 * ( 1.0 + softness ); + + // Adjust to consumer scale + int x = rint( geometry.item.x * width_dest / geometry.nw ); + int y = rint( geometry.item.y * height_dest / geometry.nh ); + int uneven_x = ( x % 2 ); + + // optimization points - no work to do + if ( width_src <= 0 || height_src <= 0 || y_src >= height_src || x_src >= width_src ) + return ret; + + if ( ( x < 0 && -x >= width_src ) || ( y < 0 && -y >= height_src ) ) + return ret; + + // cropping affects the source width + if ( x_src > 0 ) + { + width_src -= x_src; + // and it implies cropping + if ( width_src > geometry.item.w ) + width_src = geometry.item.w; + } + + // cropping affects the source height + if ( y_src > 0 ) + { + height_src -= y_src; + // and it implies cropping + if ( height_src > geometry.item.h ) + height_src = geometry.item.h; + } + + // crop overlay off the left edge of frame + if ( x < 0 ) + { + x_src = -x; + width_src -= x_src; + x = 0; + } + + // crop overlay beyond right edge of frame + if ( x + width_src > width_dest ) + width_src = width_dest - x; + + // crop overlay off the top edge of the frame + if ( y < 0 ) + { + y_src = -y; + height_src -= y_src; + y = 0; + } + + // crop overlay below bottom edge of frame + if ( y + height_src > height_dest ) + height_src = height_dest - y; + + // offset pointer into overlay buffer based on cropping + p_src += x_src * bpp + y_src * stride_src; + + // offset pointer into frame buffer based upon positive coordinates only! + p_dest += x * bpp + y * stride_dest; + + // offset pointer into alpha channel based upon cropping + alpha_b += x_src + y_src * stride_src / bpp; + alpha_a += x + y * stride_dest / bpp; + + // offset pointer into luma channel based upon cropping + if ( p_luma ) + p_luma += x_src + y_src * stride_src / bpp; + + // Assuming lower field first + // Special care is taken to make sure the b_frame is aligned to the correct field. + // field 0 = lower field and y should be odd (y is 0-based). + // field 1 = upper field and y should be even. + if ( ( field > -1 ) && ( y % 2 == field ) ) + { + if ( ( field == 1 && y < height_dest - 1 ) || ( field == 0 && y == 0 ) ) + p_dest += stride_dest; + else + p_dest -= stride_dest; + } + + // On the second field, use the other lines from b_frame + if ( field == 1 ) + { + p_src += stride_src; + alpha_b += stride_src / bpp; + alpha_a += stride_dest / bpp; + height_src--; + } + + stride_src *= step; + stride_dest *= step; + int alpha_b_stride = stride_src / bpp; + int alpha_a_stride = stride_dest / bpp; + + // Align chroma of source and destination + if ( uneven_x != uneven_x_src ) + { + p_src += 2; + alpha_b += 1; + } + + // now do the compositing only to cropped extents + for ( i = 0; i < height_src; i += step ) + { + line_fn( p_dest, p_src, width_src, alpha_b, alpha_a, weight, p_luma, i_softness, luma_step ); + + p_src += stride_src; + p_dest += stride_dest; + alpha_b += alpha_b_stride; + alpha_a += alpha_a_stride; + if ( p_luma ) + p_luma += alpha_b_stride; + } + + return ret; +} + + +/** Scale 16bit greyscale luma map using nearest neighbor. +*/ + +static inline void +scale_luma ( uint16_t *dest_buf, int dest_width, int dest_height, const uint16_t *src_buf, int src_width, int src_height, int invert ) +{ + register int i, j; + register int x_step = ( src_width << 16 ) / dest_width; + register int y_step = ( src_height << 16 ) / dest_height; + register int x, y = 0; + + for ( i = 0; i < dest_height; i++ ) + { + const uint16_t *src = src_buf + ( y >> 16 ) * src_width; + x = 0; + + for ( j = 0; j < dest_width; j++ ) + { + *dest_buf++ = src[ x >> 16 ] ^ invert; + x += x_step; + } + y += y_step; + } +} + +static uint16_t* get_luma( mlt_transition self, mlt_properties properties, int width, int height ) +{ + // The cached luma map information + int luma_width = mlt_properties_get_int( properties, "_luma.width" ); + int luma_height = mlt_properties_get_int( properties, "_luma.height" ); + uint16_t *luma_bitmap = mlt_properties_get_data( properties, "_luma.bitmap", NULL ); + int invert = mlt_properties_get_int( properties, "luma_invert" ); + + // If the filename property changed, reload the map + char *resource = mlt_properties_get( properties, "luma" ); + + char temp[ 512 ]; + + if ( luma_width == 0 || luma_height == 0 ) + { + luma_width = width; + luma_height = height; + } + + if ( resource && resource[0] && strchr( resource, '%' ) ) + { + // TODO: Clean up quick and dirty compressed/existence check + FILE *test; + sprintf( temp, "%s/lumas/%s/%s", mlt_environment( "MLT_DATA" ), mlt_environment( "MLT_NORMALISATION" ), strchr( resource, '%' ) + 1 ); + test = fopen( temp, "r" ); + if ( test == NULL ) + strcat( temp, ".png" ); + else + fclose( test ); + resource = temp; + } + + if ( resource && resource[0] ) + { + char *old_luma = mlt_properties_get( properties, "_luma" ); + int old_invert = mlt_properties_get_int( properties, "_luma_invert" ); + + if ( invert != old_invert || ( old_luma && old_luma[0] && strcmp( resource, old_luma ) ) ) + { + mlt_properties_set_data( properties, "_luma.orig_bitmap", NULL, 0, NULL, NULL ); + luma_bitmap = NULL; + } + } + else { + char *old_luma = mlt_properties_get( properties, "_luma" ); + if ( old_luma && old_luma[0] ) + { + mlt_properties_set_data( properties, "_luma.orig_bitmap", NULL, 0, NULL, NULL ); + luma_bitmap = NULL; + mlt_properties_set( properties, "_luma", NULL); + } + } + + if ( resource && resource[0] && ( luma_bitmap == NULL || luma_width != width || luma_height != height ) ) + { + uint16_t *orig_bitmap = mlt_properties_get_data( properties, "_luma.orig_bitmap", NULL ); + luma_width = mlt_properties_get_int( properties, "_luma.orig_width" ); + luma_height = mlt_properties_get_int( properties, "_luma.orig_height" ); + + // Load the original luma once + if ( orig_bitmap == NULL ) + { + char *extension = strrchr( resource, '.' ); + + // See if it is a PGM + if ( extension != NULL && strcmp( extension, ".pgm" ) == 0 ) + { + // Open PGM + FILE *f = fopen( resource, "rb" ); + if ( f != NULL ) + { + // Load from PGM + luma_read_pgm( f, &orig_bitmap, &luma_width, &luma_height ); + fclose( f ); + + // Remember the original size for subsequent scaling + mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL ); + mlt_properties_set_int( properties, "_luma.orig_width", luma_width ); + mlt_properties_set_int( properties, "_luma.orig_height", luma_height ); + } + } + else + { + // Get the factory producer service + char *factory = mlt_properties_get( properties, "factory" ); + + // Create the producer + mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( self ) ); + mlt_producer producer = mlt_factory_producer( profile, factory, resource ); + + // If we have one + if ( producer != NULL ) + { + // Get the producer properties + mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer ); + + // Ensure that we loop + mlt_properties_set( producer_properties, "eof", "loop" ); + + // Now pass all producer. properties on the transition down + mlt_properties_pass( producer_properties, properties, "luma." ); + + // We will get the alpha frame from the producer + mlt_frame luma_frame = NULL; + + // Get the luma frame + if ( mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &luma_frame, 0 ) == 0 ) + { + uint8_t *luma_image; + mlt_image_format luma_format = mlt_image_yuv422; + + // Get image from the luma producer + mlt_properties_set( MLT_FRAME_PROPERTIES( luma_frame ), "rescale.interp", "none" ); + mlt_frame_get_image( luma_frame, &luma_image, &luma_format, &luma_width, &luma_height, 0 ); + + // Generate the luma map + if ( luma_image != NULL && luma_format == mlt_image_yuv422 ) + luma_read_yuv422( luma_image, &orig_bitmap, luma_width, luma_height ); + + // Remember the original size for subsequent scaling + mlt_properties_set_data( properties, "_luma.orig_bitmap", orig_bitmap, luma_width * luma_height * 2, mlt_pool_release, NULL ); + mlt_properties_set_int( properties, "_luma.orig_width", luma_width ); + mlt_properties_set_int( properties, "_luma.orig_height", luma_height ); + + // Cleanup the luma frame + mlt_frame_close( luma_frame ); + } + + // Cleanup the luma producer + mlt_producer_close( producer ); + } + } + } + // Scale luma map + luma_bitmap = mlt_pool_alloc( width * height * sizeof( uint16_t ) ); + scale_luma( luma_bitmap, width, height, orig_bitmap, luma_width, luma_height, invert * ( ( 1 << 16 ) - 1 ) ); + + // Remember the scaled luma size to prevent unnecessary scaling + mlt_properties_set_int( properties, "_luma.width", width ); + mlt_properties_set_int( properties, "_luma.height", height ); + mlt_properties_set_data( properties, "_luma.bitmap", luma_bitmap, width * height * 2, mlt_pool_release, NULL ); + mlt_properties_set( properties, "_luma", resource ); + mlt_properties_set_int( properties, "_luma_invert", invert ); + } + return luma_bitmap; +} + +/** Get the properly sized image from b_frame. +*/ + +static int get_b_frame_image( mlt_transition self, mlt_frame b_frame, uint8_t **image, int *width, int *height, struct geometry_s *geometry ) +{ + int ret = 0; + mlt_image_format format = mlt_image_yuv422; + + // Get the properties objects + mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame ); + mlt_properties properties = MLT_TRANSITION_PROPERTIES( self ); + uint8_t resize_alpha = mlt_properties_get_int( b_props, "resize_alpha" ); + double output_ar = mlt_profile_sar( mlt_service_profile( MLT_TRANSITION_SERVICE(self) ) ); + + // Do not scale if we are cropping - the compositing rectangle can crop the b image + // TODO: Use the animatable w and h of the crop geometry to scale independently of crop rectangle + if ( mlt_properties_get( properties, "crop" ) ) + { + int real_width = get_value( b_props, "meta.media.width", "width" ); + int real_height = get_value( b_props, "meta.media.height", "height" ); + double input_ar = mlt_properties_get_double( b_props, "aspect_ratio" ); + int scaled_width = rint( ( input_ar == 0.0 ? output_ar : input_ar ) / output_ar * real_width ); + int scaled_height = real_height; + geometry->sw = scaled_width; + geometry->sh = scaled_height; + } + // Normalise aspect ratios and scale preserving aspect ratio + else if ( mlt_properties_get_int( properties, "aligned" ) && mlt_properties_get_int( properties, "distort" ) == 0 && mlt_properties_get_int( b_props, "distort" ) == 0 && geometry->item.distort == 0 ) + { + // Adjust b_frame pixel aspect + int normalised_width = geometry->item.w; + int normalised_height = geometry->item.h; + int real_width = get_value( b_props, "meta.media.width", "width" ); + int real_height = get_value( b_props, "meta.media.height", "height" ); + double input_ar = mlt_properties_get_double( b_props, "aspect_ratio" ); + int scaled_width = rint( ( input_ar == 0.0 ? output_ar : input_ar ) / output_ar * real_width ); + int scaled_height = real_height; +// fprintf(stderr, "%s: scaled %dx%d norm %dx%d real %dx%d output_ar %f\n", __FILE__, +// scaled_width, scaled_height, normalised_width, normalised_height, real_width, real_height, +// output_ar); + + // Now ensure that our images fit in the normalised frame + if ( scaled_width > normalised_width ) + { + scaled_height = rint( scaled_height * normalised_width / scaled_width ); + scaled_width = normalised_width; + } + if ( scaled_height > normalised_height ) + { + scaled_width = rint( scaled_width * normalised_height / scaled_height ); + scaled_height = normalised_height; + } + + // Honour the fill request - this will scale the image to fill width or height while maintaining a/r + // ????: Shouln't this be the default behaviour? + if ( mlt_properties_get_int( properties, "fill" ) && scaled_width > 0 && scaled_height > 0 ) + { + if ( scaled_height < normalised_height && scaled_width * normalised_height / scaled_height <= normalised_width ) + { + scaled_width = rint( scaled_width * normalised_height / scaled_height ); + scaled_height = normalised_height; + } + else if ( scaled_width < normalised_width && scaled_height * normalised_width / scaled_width < normalised_height ) + { + scaled_height = rint( scaled_height * normalised_width / scaled_width ); + scaled_width = normalised_width; + } + } + + // Save the new scaled dimensions + geometry->sw = scaled_width; + geometry->sh = scaled_height; + } + else + { + geometry->sw = geometry->item.w; + geometry->sh = geometry->item.h; + } + + // We want to ensure that we bypass resize now... + if ( resize_alpha == 0 ) + mlt_properties_set_int( b_props, "distort", mlt_properties_get_int( properties, "distort" ) ); + + // If we're not aligned, we want a non-transparent background + if ( mlt_properties_get_int( properties, "aligned" ) == 0 ) + mlt_properties_set_int( b_props, "resize_alpha", 255 ); + + // Take into consideration alignment for optimisation (titles are a special case) + if ( !mlt_properties_get_int( properties, "titles" ) && + mlt_properties_get( properties, "crop" ) == NULL ) + alignment_calculate( geometry ); + + // Adjust to consumer scale + *width = rint( geometry->sw * *width / geometry->nw ); + *width -= *width % 2; // coerce to even width for yuv422 + *height = rint( geometry->sh * *height / geometry->nh ); +// fprintf(stderr, "%s: scaled %dx%d norm %dx%d resize %dx%d\n", __FILE__, +// geometry->sw, geometry->sh, geometry->nw, geometry->nh, *width, *height); + + ret = mlt_frame_get_image( b_frame, image, &format, width, height, 1 ); + + // composite_yuv uses geometry->sw to determine source stride, which + // should equal the image width if not using crop property. + if ( !mlt_properties_get( properties, "crop" ) ) + geometry->sw = *width; + + // Set the frame back + mlt_properties_set_int( b_props, "resize_alpha", resize_alpha ); + + return ret && image != NULL; +} + +static void crop_calculate( mlt_transition self, mlt_properties properties, struct geometry_s *result, double position ) +{ + // Initialize panning info + result->x_src = 0; + result->y_src = 0; + if ( mlt_properties_get( properties, "crop" ) ) + { + mlt_geometry crop = mlt_properties_get_data( properties, "crop_geometry", NULL ); + if ( !crop ) + { + crop = mlt_geometry_init(); + mlt_position length = mlt_transition_get_length( self ); + double cycle = mlt_properties_get_double( properties, "cycle" ); + + // Allow a geometry repeat cycle + if ( cycle >= 1 ) + length = cycle; + else if ( cycle > 0 ) + length *= cycle; + mlt_geometry_parse( crop, mlt_properties_get( properties, "crop" ), length, result->sw, result->sh ); + mlt_properties_set_data( properties, "crop_geometry", crop, 0, (mlt_destructor)mlt_geometry_close, NULL ); + } + + // Repeat processing + int length = mlt_geometry_get_length( crop ); + int mirror_off = mlt_properties_get_int( properties, "mirror_off" ); + int repeat_off = mlt_properties_get_int( properties, "repeat_off" ); + if ( !repeat_off && position >= length && length != 0 ) + { + int section = position / length; + position -= section * length; + if ( !mirror_off && section % 2 == 1 ) + position = length - position; + } + + // Compute the pan + struct mlt_geometry_item_s crop_item; + mlt_geometry_fetch( crop, &crop_item, position ); + result->x_src = rint( crop_item.x ); + result->y_src = rint( crop_item.y ); + } +} + +static mlt_geometry composite_calculate( mlt_transition self, struct geometry_s *result, mlt_frame a_frame, double position ) +{ + // Get the properties from the transition + mlt_properties properties = MLT_TRANSITION_PROPERTIES( self ); + + // Get the properties from the frame + mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame ); + + // Structures for geometry + mlt_geometry start = mlt_properties_get_data( properties, "geometries", NULL ); + + // Obtain the normalised width and height from the a_frame + mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( self ) ); + int normalised_width = profile->width; + int normalised_height = profile->height; + + char *name = mlt_properties_get( properties, "_unique_id" ); + char key[ 256 ]; + + sprintf( key, "%s.in", name ); + if ( mlt_properties_get( a_props, key ) ) + { + sscanf( mlt_properties_get( a_props, key ), "%f %f %f %f %f %d %d", &result->item.x, &result->item.y, &result->item.w, &result->item.h, &result->item.mix, &result->nw, &result->nh ); + } + else + { + // Now parse the geometries + if ( start == NULL ) + { + // Parse the transitions properties + start = transition_parse_keys( self, normalised_width, normalised_height ); + + // Assign to properties to ensure we get destroyed + mlt_properties_set_data( properties, "geometries", start, 0, ( mlt_destructor )mlt_geometry_close, NULL ); + } + else + { + mlt_position length = mlt_transition_get_length( self ); + double cycle = mlt_properties_get_double( properties, "cycle" ); + if ( cycle > 1 ) + length = cycle; + else if ( cycle > 0 ) + length *= cycle; + mlt_geometry_refresh( start, mlt_properties_get( properties, "geometry" ), length, normalised_width, normalised_height ); + } + + // Do the calculation + geometry_calculate( self, result, position ); + + // Assign normalised info + result->nw = normalised_width; + result->nh = normalised_height; + } + + // Now parse the alignment + result->halign = alignment_parse( mlt_properties_get( properties, "halign" ) ); + result->valign = alignment_parse( mlt_properties_get( properties, "valign" ) ); + + crop_calculate( self, properties, result, position ); + + return start; +} + +mlt_frame composite_copy_region( mlt_transition self, mlt_frame a_frame, mlt_position frame_position ) +{ + // Create a frame to return + mlt_frame b_frame = mlt_frame_init( MLT_TRANSITION_SERVICE( self ) ); + + // Get the properties of the a frame + mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame ); // Get the properties of the b frame - mlt_properties b_props = mlt_frame_properties( b_frame ); + mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame ); + + // Get the position + int position = position_calculate( self, frame_position ); + + // Get the unique id of the transition + char *name = mlt_properties_get( MLT_TRANSITION_PROPERTIES( self ), "_unique_id" ); + char key[ 256 ]; + + // Destination image + uint8_t *dest = NULL; + + // Get the image and dimensions + uint8_t *image = NULL; + int width = mlt_properties_get_int( a_props, "width" ); + int height = mlt_properties_get_int( a_props, "height" ); + mlt_image_format format = mlt_image_yuv422; - // Arbitrary composite defaults + mlt_frame_get_image( a_frame, &image, &format, &width, &height, 0 ); + if ( !image ) + return b_frame; + + // Pointers for copy operation + uint8_t *p; + + // Coordinates + int w = 0; + int h = 0; int x = 0; int y = 0; - double mix = 1.0; - // Override from b frame properties if provided - if ( mlt_properties_get( b_props, "x" ) != NULL ) - x = mlt_properties_get_int( b_props, "x" ); - if ( mlt_properties_get( b_props, "y" ) != NULL ) - y = mlt_properties_get_int( b_props, "y" ); - if ( mlt_properties_get( b_props, "mix" ) != NULL ) - mix = mlt_properties_get_double( b_props, "mix" ); + int ss = 0; + int ds = 0; + + // Will need to know region to copy + struct geometry_s result; + + // Calculate the region now + composite_calculate( self, &result, a_frame, position ); + + // Need to scale down to actual dimensions + x = rint( result.item.x * width / result.nw ); + y = rint( result.item.y * height / result.nh ); + w = rint( result.item.w * width / result.nw ); + h = rint( result.item.h * height / result.nh ); + + if ( x % 2 ) + { + x --; + w ++; + } + + // Store the key + sprintf( key, "%s.in=%d %d %d %d %f %d %d", name, x, y, w, h, result.item.mix, width, height ); + mlt_properties_parse( a_props, key ); + sprintf( key, "%s.out=%d %d %d %d %f %d %d", name, x, y, w, h, result.item.mix, width, height ); + mlt_properties_parse( a_props, key ); + + ds = w * 2; + ss = width * 2; + + // Now we need to create a new destination image + dest = mlt_pool_alloc( w * h * 2 ); - // Composite the b_frame on the a_frame - mlt_frame_composite_yuv( this, b_frame, x, y, mix ); + // Assign to the new frame + mlt_frame_set_image( b_frame, dest, w * h * 2, mlt_pool_release ); + mlt_properties_set_int( b_props, "width", w ); + mlt_properties_set_int( b_props, "height", h ); + mlt_properties_set_int( b_props, "format", format ); - // Extract the a_frame image info - *width = mlt_properties_get_int( a_props, "width" ); - *height = mlt_properties_get_int( a_props, "height" ); - *image = mlt_properties_get_data( a_props, "image", NULL ); + if ( y < 0 ) + { + dest += ( ds * -y ); + h += y; + y = 0; + } + + if ( y + h > height ) + h -= ( y + h - height ); + + if ( x < 0 ) + { + dest += -x * 2; + w += x; + x = 0; + } + + if ( w > 0 && h > 0 ) + { + // Copy the region of the image + p = image + y * ss + x * 2; + + while ( h -- ) + { + memcpy( dest, p, w * 2 ); + dest += ds; + p += ss; + } + } + + // Assign this position to the b frame + mlt_frame_set_position( b_frame, frame_position ); + mlt_properties_set_int( b_props, "distort", 1 ); - // Close the b_frame - mlt_frame_close( b_frame ); + // Return the frame + return b_frame; +} + +/** Get the image. +*/ + +static int transition_get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ) +{ + // Get the b frame from the stack + mlt_frame b_frame = mlt_frame_pop_frame( a_frame ); + + // Get the transition from the a frame + mlt_transition self = mlt_frame_pop_service( a_frame ); + + // Get in and out + double position = mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( a_frame ) ); + int out = mlt_frame_pop_service_int( a_frame ); + int in = mlt_frame_pop_service_int( a_frame ); + + // Get the properties from the transition + mlt_properties properties = MLT_TRANSITION_PROPERTIES( self ); + + // TODO: clean up always_active behaviour + if ( mlt_properties_get_int( properties, "always_active" ) ) + { + mlt_events_block( properties, properties ); + mlt_properties_set_int( properties, "in", in ); + mlt_properties_set_int( properties, "out", out ); + mlt_events_unblock( properties, properties ); + } + + // This compositer is yuv422 only + *format = mlt_image_yuv422; + + if ( b_frame != NULL ) + { + // Get the properties of the a frame + mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame ); + + // Get the properties of the b frame + mlt_properties b_props = MLT_FRAME_PROPERTIES( b_frame ); + + // Structures for geometry + struct geometry_s result; + + // Calculate the position + double delta = mlt_transition_get_progress_delta( self, a_frame ); + mlt_position length = mlt_transition_get_length( self ); + + // Get the image from the b frame + uint8_t *image_b = NULL; + mlt_profile profile = mlt_service_profile( MLT_TRANSITION_SERVICE( self ) ); + int width_b = *width > 0 ? *width : profile->width; + int height_b = *height > 0 ? *height : profile->height; + + // Vars for alphas + uint8_t *alpha_a = NULL; + uint8_t *alpha_b = NULL; + + // Do the calculation + // NB: Locks needed here since the properties are being modified + int invert = mlt_properties_get_int( properties, "invert" ); + mlt_service_lock( MLT_TRANSITION_SERVICE( self ) ); + composite_calculate( self, &result, invert ? b_frame : a_frame, position ); + mlt_service_unlock( MLT_TRANSITION_SERVICE( self ) ); + + // Manual option to deinterlace + if ( mlt_properties_get_int( properties, "deinterlace" ) ) + { + mlt_properties_set_int( a_props, "consumer_deinterlace", 1 ); + mlt_properties_set_int( b_props, "consumer_deinterlace", 1 ); + } + + // TODO: Dangerous/temporary optimisation - if nothing to do, then do nothing + if ( mlt_properties_get_int( properties, "no_alpha" ) && + result.item.x == 0 && result.item.y == 0 && result.item.w == *width && result.item.h == *height && result.item.mix == 100 ) + { + mlt_frame_get_image( b_frame, image, format, width, height, 1 ); + if ( !mlt_frame_is_test_card( a_frame ) ) + mlt_frame_replace_image( a_frame, *image, *format, *width, *height ); + return 0; + } + + if ( a_frame == b_frame ) + { + double aspect_ratio = mlt_frame_get_aspect_ratio( b_frame ); + get_b_frame_image( self, b_frame, &image_b, &width_b, &height_b, &result ); + alpha_b = mlt_frame_get_alpha_mask( b_frame ); + mlt_properties_set_double( a_props, "aspect_ratio", aspect_ratio ); + } + + // Get the image from the a frame + mlt_frame_get_image( a_frame, invert ? &image_b : image, format, width, height, 1 ); + alpha_a = mlt_frame_get_alpha_mask( a_frame ); + + // Optimisation - no compositing required + if ( result.item.mix == 0 || ( result.item.w == 0 && result.item.h == 0 ) ) + return 0; + + // Need to keep the width/height of the a_frame on the b_frame for titling + if ( mlt_properties_get( a_props, "dest_width" ) == NULL ) + { + mlt_properties_set_int( a_props, "dest_width", *width ); + mlt_properties_set_int( a_props, "dest_height", *height ); + mlt_properties_set_int( b_props, "dest_width", *width ); + mlt_properties_set_int( b_props, "dest_height", *height ); + } + else + { + mlt_properties_set_int( b_props, "dest_width", mlt_properties_get_int( a_props, "dest_width" ) ); + mlt_properties_set_int( b_props, "dest_height", mlt_properties_get_int( a_props, "dest_height" ) ); + } + + // Special case for titling... + if ( mlt_properties_get_int( properties, "titles" ) ) + { + if ( mlt_properties_get( b_props, "rescale.interp" ) == NULL ) + mlt_properties_set( b_props, "rescale.interp", "hyper" ); + width_b = mlt_properties_get_int( a_props, "dest_width" ); + height_b = mlt_properties_get_int( a_props, "dest_height" ); + } + + if ( *image != image_b && ( ( invert ? 0 : image_b ) || get_b_frame_image( self, b_frame, invert ? image : &image_b, &width_b, &height_b, &result ) == 0 ) ) + { + uint8_t *dest = *image; + uint8_t *src = image_b; + int progressive = + mlt_properties_get_int( a_props, "consumer_deinterlace" ) || + mlt_properties_get_int( properties, "progressive" ); + int field; + + double luma_softness = mlt_properties_get_double( properties, "softness" ); + mlt_service_lock( MLT_TRANSITION_SERVICE( self ) ); + uint16_t *luma_bitmap = get_luma( self, properties, width_b, height_b ); + mlt_service_unlock( MLT_TRANSITION_SERVICE( self ) ); + char *operator = mlt_properties_get( properties, "operator" ); + + alpha_b = alpha_b == NULL ? mlt_frame_get_alpha_mask( b_frame ) : alpha_b; + + composite_line_fn line_fn = composite_line_yuv; + + // Replacement and override + if ( operator != NULL ) + { + if ( !strcmp( operator, "or" ) ) + line_fn = composite_line_yuv_or; + if ( !strcmp( operator, "and" ) ) + line_fn = composite_line_yuv_and; + if ( !strcmp( operator, "xor" ) ) + line_fn = composite_line_yuv_xor; + } + + // Allow the user to completely obliterate the alpha channels from both frames + if ( mlt_properties_get( properties, "alpha_a" ) ) + memset( alpha_a, mlt_properties_get_int( properties, "alpha_a" ), *width * *height ); + + if ( mlt_properties_get( properties, "alpha_b" ) ) + memset( alpha_b, mlt_properties_get_int( properties, "alpha_b" ), width_b * height_b ); + + for ( field = 0; field < ( progressive ? 1 : 2 ); field++ ) + { + // Assume lower field (0) first + double field_position = position + field * delta * length; + + // Do the calculation if we need to + // NB: Locks needed here since the properties are being modified + mlt_service_lock( MLT_TRANSITION_SERVICE( self ) ); + composite_calculate( self, &result, invert ? b_frame : a_frame, field_position ); + mlt_service_unlock( MLT_TRANSITION_SERVICE( self ) ); + + if ( mlt_properties_get_int( properties, "titles" ) ) + { + result.item.w = rint( *width * ( result.item.w / result.nw ) ); + result.nw = result.item.w; + result.item.h = rint( *height * ( result.item.h / result.nh ) ); + result.nh = *height; + result.sw = width_b; + result.sh = height_b; + } + + // Enforce cropping + if ( mlt_properties_get( properties, "crop" ) ) + { + if ( result.x_src == 0 ) + width_b = width_b > result.item.w ? result.item.w : width_b; + if ( result.y_src == 0 ) + height_b = height_b > result.item.h ? result.item.h : height_b; + } + else + { + // Otherwise, align + alignment_calculate( &result ); + } + + // Composite the b_frame on the a_frame + if ( invert ) + composite_yuv( dest, width_b, height_b, src, *width, *height, alpha_a, alpha_b, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn ); + else + composite_yuv( dest, *width, *height, src, width_b, height_b, alpha_b, alpha_a, result, progressive ? -1 : field, luma_bitmap, luma_softness, line_fn ); + } + } + } + else + { + mlt_frame_get_image( a_frame, image, format, width, height, 1 ); + } return 0; } @@ -77,37 +1298,55 @@ static int transition_get_image( mlt_frame this, uint8_t **image, mlt_image_form /** Composition transition processing. */ -static mlt_frame composite_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame ) +static mlt_frame composite_process( mlt_transition self, mlt_frame a_frame, mlt_frame b_frame ) { - mlt_frame_push_get_image( a_frame, transition_get_image ); - mlt_frame_push_frame( a_frame, b_frame ); + // UGH - this is a TODO - find a more reliable means of obtaining in/out for the always_active case + if ( mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( self ), "always_active" ) == 0 ) + { + mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( self ), "in" ) ); + mlt_frame_push_service_int( a_frame, mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( self ), "out" ) ); + mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), position_calculate( self, mlt_frame_get_position( a_frame ) ) ); + } + else + { + mlt_properties props = mlt_properties_get_data( MLT_FRAME_PROPERTIES( b_frame ), "_producer", NULL ); + mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "in" ) ); + mlt_frame_push_service_int( a_frame, mlt_properties_get_int( props, "out" ) ); + mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( a_frame ), mlt_properties_get_int( props, "_frame" ) - mlt_properties_get_int( props, "in" ) ); + } - // Propogate the transition properties to the b frame - mlt_properties properties = mlt_transition_properties( this ); - mlt_properties b_props = mlt_frame_properties( b_frame ); - if ( mlt_properties_get( properties, "x" ) != NULL ) - mlt_properties_set_int( b_props, "x", mlt_properties_get_int( properties, "x" ) ); - if ( mlt_properties_get( properties, "y" ) != NULL ) - mlt_properties_set_int( b_props, "y", mlt_properties_get_int( properties, "y" ) ); - if ( mlt_properties_get( properties, "mix" ) != NULL ) - mlt_properties_set_double( b_props, "mix", mlt_properties_get_double( properties, "mix" ) ); - + mlt_frame_push_service( a_frame, self ); + mlt_frame_push_frame( a_frame, b_frame ); + mlt_frame_push_get_image( a_frame, transition_get_image ); return a_frame; } /** Constructor for the filter. */ -mlt_transition transition_composite_init( void *arg ) +mlt_transition transition_composite_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg ) { - transition_composite *this = calloc( sizeof( transition_composite ), 1 ); - if ( this != NULL ) + mlt_transition self = calloc( 1, sizeof( struct mlt_transition_s ) ); + if ( self != NULL && mlt_transition_init( self, NULL ) == 0 ) { - mlt_transition transition = &this->parent; - mlt_transition_init( transition, this ); - transition->process = composite_process; - return &this->parent; + mlt_properties properties = MLT_TRANSITION_PROPERTIES( self ); + + self->process = composite_process; + + // Default starting motion and zoom + mlt_properties_set( properties, "start", arg != NULL ? arg : "0/0:100%x100%" ); + + // Default factory + mlt_properties_set( properties, "factory", mlt_environment( "MLT_PRODUCER" ) ); + + // Use alignment (and hence alpha of b frame) + mlt_properties_set_int( properties, "aligned", 1 ); + + // Default to progressive rendering + mlt_properties_set_int( properties, "progressive", 1 ); + + // Inform apps and framework that this is a video only transition + mlt_properties_set_int( properties, "_transition_type", 1 ); } - return NULL; + return self; } -