* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
* Author: Charles Yates <charles.yates@pandora.be>
*
- * 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 "filter_resize.h"
-
+#include <framework/mlt_filter.h>
#include <framework/mlt_frame.h>
+#include <framework/mlt_profile.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
+#include <math.h>
+
+static uint8_t *resize_alpha( uint8_t *input, int owidth, int oheight, int iwidth, int iheight, uint8_t alpha_value )
+{
+ uint8_t *output = NULL;
+
+ if ( input != NULL && ( iwidth != owidth || iheight != oheight ) && ( owidth > 6 && oheight > 6 ) )
+ {
+ uint8_t *out_line;
+ int offset_x = ( owidth - iwidth ) / 2;
+ int offset_y = ( oheight - iheight ) / 2;
+ int iused = iwidth;
+
+ output = mlt_pool_alloc( owidth * oheight );
+ memset( output, alpha_value, owidth * oheight );
+
+ offset_x -= offset_x % 2;
+
+ out_line = output + offset_y * owidth;
+ out_line += offset_x;
+
+ // Loop for the entirety of our output height.
+ while ( iheight -- )
+ {
+ // We're in the input range for this row.
+ memcpy( out_line, input, iused );
+
+ // Move to next input line
+ input += iwidth;
+
+ // Move to next output line
+ out_line += owidth;
+ }
+ }
+
+ return output;
+}
+
+static void resize_image( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight, int bpp )
+{
+ // Calculate strides
+ int istride = iwidth * bpp;
+ int ostride = owidth * bpp;
+ int offset_x = ( owidth - iwidth ) / 2 * bpp;
+ int offset_y = ( oheight - iheight ) / 2;
+ uint8_t *in_line = input;
+ uint8_t *out_line;
+ int size = owidth * oheight;
+ uint8_t *p = output;
+
+ // Optimisation point
+ if ( output == NULL || input == NULL || ( owidth <= 6 || oheight <= 6 || iwidth <= 6 || oheight <= 6 ) )
+ {
+ return;
+ }
+ else if ( iwidth == owidth && iheight == oheight )
+ {
+ memcpy( output, input, iheight * istride );
+ return;
+ }
+
+ if ( bpp == 2 )
+ {
+ while( size -- )
+ {
+ *p ++ = 16;
+ *p ++ = 128;
+ }
+ offset_x -= offset_x % 4;
+ }
+ else
+ {
+ size *= bpp;
+ while ( size-- )
+ *p ++ = 0;
+ }
+
+ out_line = output + offset_y * ostride;
+ out_line += offset_x;
+
+ // Loop for the entirety of our output height.
+ while ( iheight -- )
+ {
+ // We're in the input range for this row.
+ memcpy( out_line, in_line, istride );
+
+ // Move to next input line
+ in_line += istride;
+
+ // Move to next output line
+ out_line += ostride;
+ }
+}
+
+/** A padding function for frames - this does not rescale, but simply
+ resizes.
+*/
-static int get_value( mlt_properties properties, char *preferred, char *fallback )
+static uint8_t *frame_resize_image( mlt_frame frame, int owidth, int oheight, int bpp )
{
- int value = mlt_properties_get_int( properties, preferred );
- if ( value == 0 )
- value = mlt_properties_get_int( properties, fallback );
- return value;
+ // Get properties
+ mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
+
+ // Get the input image, width and height
+ uint8_t *input = mlt_properties_get_data( properties, "image", NULL );
+ uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
+ int alpha_size = 0;
+ mlt_properties_get_data( properties, "alpha", &alpha_size );
+
+ 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 )
+ {
+ uint8_t alpha_value = mlt_properties_get_int( properties, "resize_alpha" );
+
+ // Create the output image
+ uint8_t *output = mlt_pool_alloc( owidth * ( oheight + 1 ) * bpp );
+
+ // Call the generic resize
+ resize_image( output, owidth, oheight, input, iwidth, iheight, bpp );
+
+ // Now update the frame
+ mlt_frame_set_image( frame, output, owidth * ( oheight + 1 ) * bpp, mlt_pool_release );
+
+ // We should resize the alpha too
+ if ( alpha && alpha_size >= iwidth * iheight )
+ {
+ alpha = resize_alpha( alpha, owidth, oheight, iwidth, iheight, alpha_value );
+ if ( alpha )
+ mlt_frame_set_alpha( frame, alpha, owidth * oheight, mlt_pool_release );
+ }
+
+ // Return the output
+ return output;
+ }
+ // No change, return input
+ return input;
}
/** Do it :-).
*/
-static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
+static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
{
+ int error = 0;
+
// Get the properties from the frame
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
+
+ // Pop the top of stack now
+ mlt_filter filter = mlt_frame_pop_service( frame );
+ mlt_profile profile = mlt_service_profile( MLT_FILTER_SERVICE( filter ) );
+
+ // Retrieve the aspect ratio
+ double aspect_ratio = mlt_deque_pop_back_double( MLT_FRAME_IMAGE_STACK( frame ) );
+ double consumer_aspect = mlt_profile_sar( mlt_service_profile( MLT_FILTER_SERVICE( filter ) ) );
+
+ // Correct Width/height if necessary
+ if ( *width == 0 || *height == 0 )
+ {
+ *width = profile->width;
+ *height = profile->height;
+ }
// Assign requested width/height from our subordinate
int owidth = *width;
int oheight = *height;
- if ( mlt_properties_get( properties, "distort" ) == NULL )
+ // Check for the special case - no aspect ratio means no problem :-)
+ if ( aspect_ratio == 0.0 )
+ aspect_ratio = consumer_aspect;
+
+ // Reset the aspect ratio
+ mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
+
+ // Hmmm...
+ char *rescale = mlt_properties_get( properties, "rescale.interp" );
+ if ( rescale != NULL && !strcmp( rescale, "none" ) )
+ return mlt_frame_get_image( frame, image, format, width, height, writable );
+
+ if ( mlt_properties_get_int( properties, "distort" ) == 0 )
{
- // Now do additional calcs based on real_width/height etc
- int normalised_width = mlt_properties_get_int( properties, "normalised_width" );
- int normalised_height = mlt_properties_get_int( properties, "normalised_height" );
- int real_width = get_value( properties, "real_width", "width" );
- int real_height = get_value( properties, "real_height", "height" );
- double input_ar = mlt_frame_get_aspect_ratio( this );
- double output_ar = mlt_properties_get_double( properties, "consumer_aspect_ratio" );
- int scaled_width = ( input_ar > output_ar ? input_ar / output_ar : output_ar / input_ar ) * real_width;
- int scaled_height = ( input_ar > output_ar ? input_ar / output_ar : output_ar / input_ar ) * real_height;
-
- // Now ensure that our images fit in the normalised frame
+ // Normalise the input and out display aspect
+ int normalised_width = profile->width;
+ int normalised_height = profile->height;
+ int real_width = mlt_properties_get_int( properties, "meta.media.width" );
+ int real_height = mlt_properties_get_int( properties, "meta.media.height" );
+ if ( real_width == 0 )
+ real_width = mlt_properties_get_int( properties, "width" );
+ if ( real_height == 0 )
+ real_height = mlt_properties_get_int( properties, "height" );
+ double input_ar = aspect_ratio * real_width / real_height;
+ double output_ar = consumer_aspect * owidth / oheight;
+
+// fprintf( stderr, "real %dx%d normalised %dx%d output %dx%d sar %f in-dar %f out-dar %f\n",
+// real_width, real_height, normalised_width, normalised_height, owidth, oheight, aspect_ratio, input_ar, output_ar);
+
+ // Optimised for the input_ar > output_ar case (e.g. widescreen on standard)
+ int scaled_width = rint( ( input_ar * normalised_width ) / output_ar );
+ int scaled_height = normalised_height;
+
+ // Now ensure that our images fit in the output frame
if ( scaled_width > normalised_width )
{
- scaled_height = scaled_height * normalised_width / scaled_width;
scaled_width = normalised_width;
- }
- if ( scaled_height > normalised_height )
- {
- scaled_width = scaled_width * normalised_height / scaled_height;
- scaled_height = normalised_height;
+ scaled_height = rint( ( output_ar * normalised_height ) / input_ar );
}
- if ( input_ar == output_ar && scaled_height == normalised_height )
- scaled_width = normalised_width;
-
// Now calculate the actual image size that we want
- owidth = scaled_width * owidth / normalised_width;
- oheight = scaled_height * oheight / normalised_height;
+ owidth = rint( scaled_width * owidth / normalised_width );
+ oheight = rint( scaled_height * oheight / normalised_height );
+
+ // Tell frame we have conformed the aspect to the consumer
+ mlt_frame_set_aspect_ratio( frame, consumer_aspect );
}
+ mlt_properties_set_int( properties, "distort", 0 );
+
// Now pass on the calculations down the line
mlt_properties_set_int( properties, "resize_width", *width );
mlt_properties_set_int( properties, "resize_height", *height );
// Now get the image
- mlt_frame_get_image( this, image, format, &owidth, &oheight, writable );
-
- // Correct field order if needed
- if ( mlt_properties_get_int( properties, "top_field_first" ) == 1 )
- {
- // Get the input image, width and height
- int size;
- uint8_t *image = mlt_properties_get_data( properties, "image", &size );
-
- // Keep the original image around to be destroyed on frame close
- mlt_properties_rename( properties, "image", "original_image" );
+ if ( *format == mlt_image_yuv422 )
+ owidth -= owidth % 2;
+ error = mlt_frame_get_image( frame, image, format, &owidth, &oheight, writable );
- // Offset the image pointer by one line
- image += owidth * 2;
- size -= owidth * 2;
-
- // Set the new image pointer with no destructor
- mlt_properties_set_data( properties, "image", image, size, NULL, NULL );
-
- // Set the normalised field order
- mlt_properties_set_int( properties, "top_field_first", 0 );
- }
-
- if ( !strcmp( mlt_properties_get( properties, "resize.scale" ), "affine" ) )
- *image = mlt_frame_rescale_yuv422( this, *width, *height );
- else if ( strcmp( mlt_properties_get( properties, "resize.scale" ), "none" ) != 0 )
- *image = mlt_frame_resize_yuv422( this, *width, *height );
- else
+ if ( error == 0 && *image )
{
- *width = owidth;
- *height = oheight;
+ int bpp;
+ mlt_image_format_size( *format, owidth, oheight, &bpp );
+ *image = frame_resize_image( frame, *width, *height, bpp );
}
- return 0;
+
+ return error;
}
/** Filter processing.
*/
-static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
+static mlt_frame filter_process( mlt_filter filter, mlt_frame frame )
{
+ // Store the aspect ratio reported by the source
+ mlt_deque_push_back_double( MLT_FRAME_IMAGE_STACK( frame ), mlt_frame_get_aspect_ratio( frame ) );
+
+ // Push this on to the service stack
+ mlt_frame_push_service( frame, filter );
+
+ // Push the get_image method on to the stack
mlt_frame_push_get_image( frame, filter_get_image );
- mlt_properties_set( mlt_frame_properties( frame ), "resize.scale", mlt_properties_get( mlt_filter_properties( this ), "scale" ) );
+
return frame;
}
/** Constructor for the filter.
*/
-mlt_filter filter_resize_init( char *arg )
+mlt_filter filter_resize_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
{
- mlt_filter this = calloc( sizeof( struct mlt_filter_s ), 1 );
- if ( mlt_filter_init( this, this ) == 0 )
+ mlt_filter filter = calloc( 1, sizeof( struct mlt_filter_s ) );
+ if ( mlt_filter_init( filter, filter ) == 0 )
{
- this->process = filter_process;
- if ( arg != NULL )
- mlt_properties_set( mlt_filter_properties( this ), "scale", arg );
- else
- mlt_properties_set( mlt_filter_properties( this ), "scale", "off" );
+ filter->process = filter_process;
}
- return this;
+ return filter;
}
-
projects / mlt / blobdiff