-/*
- * mlt_frame.c -- interface for all frame classes
- * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
+/**
+ * \file mlt_frame.c
+ * \brief interface for all frame classes
+ * \see mlt_frame_s
*
- * 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.
+ * Copyright (C) 2003-2009 Ushodaya Enterprises Limited
+ * \author Charles Yates <charles.yates@pandora.be>
*
- * This program is distributed in the hope that it will be useful,
+ * 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 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 "config.h"
#include "mlt_frame.h"
#include "mlt_producer.h"
#include "mlt_factory.h"
+#include "mlt_profile.h"
+#include "mlt_log.h"
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-/** Constructor for a frame.
-*/
+/** Construct a frame object.
+ *
+ * \public \memberof mlt_frame_s
+ * \param service the pointer to any service that can provide access to the profile
+ * \return a frame object on success or NULL if there was an allocation error
+ */
-mlt_frame mlt_frame_init( )
+mlt_frame mlt_frame_init( mlt_service service )
{
// Allocate a frame
mlt_frame this = calloc( sizeof( struct mlt_frame_s ), 1 );
if ( this != NULL )
{
- // Get the normalisation
- char *normalisation = mlt_environment( "MLT_NORMALISATION" );
+ mlt_profile profile = mlt_service_profile( service );
// Initialise the properties
mlt_properties properties = &this->parent;
// Set default properties on the frame
mlt_properties_set_position( properties, "_position", 0.0 );
mlt_properties_set_data( properties, "image", NULL, 0, NULL, NULL );
-
- 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 );
- mlt_properties_set_double( properties, "aspect_ratio", 72.0/79.0 );
- }
- 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", 128.0/117.0 );
- }
-
+ mlt_properties_set_int( properties, "width", profile? profile->width : 720 );
+ mlt_properties_set_int( properties, "height", profile? profile->height : 576 );
+ mlt_properties_set_int( properties, "normalised_width", profile? profile->width : 720 );
+ mlt_properties_set_int( properties, "normalised_height", profile? profile->height : 576 );
+ mlt_properties_set_double( properties, "aspect_ratio", mlt_profile_sar( NULL ) );
mlt_properties_set_data( properties, "audio", NULL, 0, NULL, NULL );
mlt_properties_set_data( properties, "alpha", NULL, 0, NULL, NULL );
// Construct stacks for frames and methods
this->stack_image = mlt_deque_init( );
this->stack_audio = mlt_deque_init( );
+ this->stack_service = mlt_deque_init( );
}
return this;
}
-/** Fetch the frames properties.
-*/
+/** Get a frame's properties.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return the frame's properties or NULL if an invalid frame is supplied
+ */
mlt_properties mlt_frame_properties( mlt_frame this )
{
return this != NULL ? &this->parent : NULL;
}
-/** Check if we have a way to derive something other than a test card.
-*/
+/** Determine if the frame will produce a test card image.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return true (non-zero) if this will produce from a test card
+ */
int mlt_frame_is_test_card( mlt_frame this )
{
- return mlt_deque_count( this->stack_image ) == 0 || mlt_properties_get_int( mlt_frame_properties( this ), "test_image" );
+ return mlt_deque_count( this->stack_image ) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_image" );
}
-/** Check if we have a way to derive something than test audio.
-*/
+/** Determine if the frame will produce audio from a test card.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return true (non-zero) if this will produce from a test card
+ */
int mlt_frame_is_test_audio( mlt_frame this )
{
- return this->get_audio == NULL || mlt_properties_get_int( mlt_frame_properties( this ), "test_audio" );
+ return mlt_deque_count( this->stack_audio ) == 0 || mlt_properties_get_int( MLT_FRAME_PROPERTIES( this ), "test_audio" );
}
-/** Get the aspect ratio of the frame.
-*/
+/** Get the sample aspect ratio of the frame.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return the aspect ratio
+ */
double mlt_frame_get_aspect_ratio( mlt_frame this )
{
- return mlt_properties_get_double( mlt_frame_properties( this ), "aspect_ratio" );
+ return mlt_properties_get_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio" );
}
-/** Set the aspect ratio of the frame.
-*/
+/** Set the sample aspect ratio of the frame.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param value the new image sample aspect ratio
+ * \return true if error
+ */
int mlt_frame_set_aspect_ratio( mlt_frame this, double value )
{
- return mlt_properties_set_double( mlt_frame_properties( this ), "aspect_ratio", value );
+ return mlt_properties_set_double( MLT_FRAME_PROPERTIES( this ), "aspect_ratio", value );
}
-/** Get the position of this frame.
-*/
+/** Get the time position of this frame.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return the position
+ */
mlt_position mlt_frame_get_position( mlt_frame this )
{
- return mlt_properties_get_position( mlt_frame_properties( this ), "_position" );
+ int pos = mlt_properties_get_position( MLT_FRAME_PROPERTIES( this ), "_position" );
+ return pos < 0 ? 0 : pos;
}
-/** Set the position of this frame.
-*/
+/** Set the time position of this frame.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param value the position
+ * \return true if error
+ */
int mlt_frame_set_position( mlt_frame this, mlt_position value )
{
- return mlt_properties_set_position( mlt_frame_properties( this ), "_position", value );
+ return mlt_properties_set_position( MLT_FRAME_PROPERTIES( this ), "_position", value );
}
/** Stack a get_image callback.
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param the get_image callback
+ * \return true if error
+ */
int mlt_frame_push_get_image( mlt_frame this, mlt_get_image get_image )
{
}
/** Pop a get_image callback.
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return the get_image callback
+ */
mlt_get_image mlt_frame_pop_get_image( mlt_frame this )
{
}
/** Push a frame.
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param that the frame to push onto \p this
+ * \return true if error
+ */
int mlt_frame_push_frame( mlt_frame this, mlt_frame that )
{
}
/** Pop a frame.
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return a frame that was previously pushed
+ */
mlt_frame mlt_frame_pop_frame( mlt_frame this )
{
}
/** Push a service.
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param that an opaque pointer
+ * \return true if error
+ */
int mlt_frame_push_service( mlt_frame this, void *that )
{
}
/** Pop a service.
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return an opaque pointer to something previously pushed
+ */
void *mlt_frame_pop_service( mlt_frame this )
{
return mlt_deque_pop_back( this->stack_image );
}
+/** Push a number.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param that an integer
+ * \return true if error
+ */
+
+int mlt_frame_push_service_int( mlt_frame this, int that )
+{
+ return mlt_deque_push_back_int( this->stack_image, that );
+}
+
+/** Pop a number.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return an integer that was previously pushed
+ */
+
+int mlt_frame_pop_service_int( mlt_frame this )
+{
+ return mlt_deque_pop_back_int( this->stack_image );
+}
+
/** Push an audio item on the stack.
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param that an opaque pointer
+ * \return true if error
+ */
int mlt_frame_push_audio( mlt_frame this, void *that )
{
}
/** Pop an audio item from the stack
-*/
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return an opaque pointer to something that was pushed onto the frame's audio stack
+ */
void *mlt_frame_pop_audio( mlt_frame this )
{
return mlt_deque_pop_back( this->stack_audio );
}
+/** Return the service stack
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return the service stack
+ */
+
+mlt_deque mlt_frame_service_stack( mlt_frame this )
+{
+ return this->stack_service;
+}
+
+/** Replace image stack with the information provided.
+ *
+ * This might prove to be unreliable and restrictive - the idea is that a transition
+ * which normally uses two images may decide to only use the b frame (ie: in the case
+ * of a composite where the b frame completely obscures the a frame).
+ *
+ * The image must be writable and the destructor for the image itself must be taken
+ * care of on another frame and that frame cannot have a replace applied to it...
+ * Further it assumes that no alpha mask is in use.
+ *
+ * For these reasons, it can only be used in a specific situation - when you have
+ * multiple tracks each with their own transition and these transitions are applied
+ * in a strictly reversed order (ie: highest numbered [lowest track] is processed
+ * first).
+ *
+ * More reliable approach - the cases should be detected during the process phase
+ * and the upper tracks should simply not be invited to stack...
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param image a new image
+ * \param format the image format
+ * \param width the width of the new image
+ * \param height the height of the new image
+ */
+
+void mlt_frame_replace_image( mlt_frame this, uint8_t *image, mlt_image_format format, int width, int height )
+{
+ // Remove all items from the stack
+ while( mlt_deque_pop_back( this->stack_image ) ) ;
+
+ // Update the information
+ mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "image", image, 0, NULL, NULL );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "width", width );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "height", height );
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "format", format );
+ this->get_alpha_mask = NULL;
+}
+
+/** Get the short name for an image format.
+ *
+ * \public \memberof mlt_frame_s
+ * \param format the image format
+ * \return a string
+ */
+
+const char * mlt_image_format_name( mlt_image_format format )
+{
+ switch ( format )
+ {
+ case mlt_image_none: return "none";
+ case mlt_image_rgb24: return "rgb24";
+ case mlt_image_rgb24a: return "rgb24a";
+ case mlt_image_yuv422: return "yuv422";
+ case mlt_image_yuv420p: return "yuv420p";
+ case mlt_image_opengl: return "opengl";
+ }
+ return "invalid";
+}
+
+/** Get the image associated to the frame.
+ *
+ * You should express the desired format, width, and height as inputs. As long
+ * as the loader producer was used to generate this or the imageconvert filter
+ * was attached, then you will get the image back in the format you desire.
+ * However, you do not always get the width and height you request depending
+ * on properties and filters. You do not need to supply a pre-allocated
+ * buffer, but you should always supply the desired image format.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param[out] buffer an image buffer
+ * \param[in,out] format the image format
+ * \param[in,out] width the horizontal size in pixels
+ * \param[in,out] height the vertical size in pixels
+ * \param writable whether or not you will need to be able to write to the memory returned in \p buffer
+ * \return true if error
+ * \todo Better describe the width and height as inputs.
+ */
+
int mlt_frame_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
{
- mlt_properties properties = mlt_frame_properties( this );
+ 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 );
+ mlt_image_format requested_format = *format;
+ int error = 0;
- *width = *width >> 1 << 1;
-
- if ( get_image != NULL )
+ if ( get_image )
{
- int error = 0;
- mlt_position position = mlt_frame_get_position( this );
- error = get_image( this, buffer, format, width, height, writable );
- mlt_frame_set_position( this, position );
- return error;
+ mlt_properties_set_int( properties, "image_count", mlt_properties_get_int( properties, "image_count" ) - 1 );
+ error = get_image( this, buffer, format, width, height, writable );
+ if ( !error )
+ {
+ mlt_properties_set_int( properties, "width", *width );
+ mlt_properties_set_int( properties, "height", *height );
+ mlt_properties_set_int( properties, "format", *format );
+ if ( this->convert_image )
+ this->convert_image( this, buffer, format, requested_format );
+ }
+ else
+ {
+ // Cause the image to be loaded from test card or fallback (white) below.
+ mlt_frame_get_image( this, buffer, format, width, height, writable );
+ }
}
- else if ( mlt_properties_get_data( properties, "image", NULL ) != NULL )
+ else if ( mlt_properties_get_data( properties, "image", NULL ) )
{
- *format = mlt_image_yuv422;
+ *format = mlt_properties_get_int( properties, "format" );
*buffer = mlt_properties_get_data( properties, "image", NULL );
*width = mlt_properties_get_int( properties, "width" );
*height = mlt_properties_get_int( properties, "height" );
+ if ( this->convert_image )
+ this->convert_image( this, buffer, format, requested_format );
}
- else if ( producer != NULL )
+ else if ( producer )
{
mlt_frame test_frame = NULL;
- mlt_service_get_frame( mlt_producer_service( producer ), &test_frame, 0 );
- if ( test_frame != NULL )
+ mlt_service_get_frame( MLT_PRODUCER_SERVICE( producer ), &test_frame, 0 );
+ if ( test_frame )
{
- mlt_properties test_properties = mlt_frame_properties( test_frame );
+ 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( test_properties, "rescale.interp", mlt_properties_get( properties, "rescale.interp" ) );
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 );
mlt_properties_set_double( properties, "aspect_ratio", mlt_frame_get_aspect_ratio( test_frame ) );
+// 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 );
+// mlt_properties_set_int( properties, "format", *format );
}
else
{
*height = *height == 0 ? 576 : *height;
size = *width * *height;
+ mlt_properties_set_int( properties, "format", *format );
mlt_properties_set_int( properties, "width", *width );
mlt_properties_set_int( properties, "height", *height );
- mlt_properties_set_int( properties, "aspect_ratio", 1 );
+ mlt_properties_set_int( properties, "aspect_ratio", 0 );
switch( *format )
{
memset( *buffer, 255, size );
break;
case mlt_image_rgb24a:
+ case mlt_image_opengl:
size *= 4;
size += *width * 4;
*buffer = mlt_pool_alloc( size );
mlt_properties_set_int( properties, "test_image", 1 );
}
- return 0;
+ mlt_properties_set_int( properties, "scaled_width", *width );
+ mlt_properties_set_int( properties, "scaled_height", *height );
+
+ return error;
}
+/** Get the alpha channel associated to the frame.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return the alpha channel
+ */
+
uint8_t *mlt_frame_get_alpha_mask( mlt_frame this )
{
- if ( this != NULL && this->get_alpha_mask != NULL )
- return this->get_alpha_mask( this );
- return this == NULL ? NULL : mlt_properties_get_data( &this->parent, "alpha", NULL );
+ uint8_t *alpha = NULL;
+ if ( this != NULL )
+ {
+ if ( this->get_alpha_mask != NULL )
+ alpha = this->get_alpha_mask( this );
+ if ( alpha == NULL )
+ alpha = mlt_properties_get_data( &this->parent, "alpha", NULL );
+ if ( alpha == NULL )
+ {
+ int size = mlt_properties_get_int( &this->parent, "scaled_width" ) * mlt_properties_get_int( &this->parent, "scaled_height" );
+ alpha = mlt_pool_alloc( size );
+ memset( alpha, 255, size );
+ mlt_properties_set_data( &this->parent, "alpha", alpha, size, mlt_pool_release, NULL );
+ }
+ }
+ return alpha;
+}
+
+/** Get the short name for an audio format.
+ *
+ * You do not need to deallocate the returned string.
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param format an image format enum
+ * \return a string for the name of the image format
+ */
+
+const char * mlt_audio_format_name( mlt_audio_format format )
+{
+ switch ( format )
+ {
+ case mlt_audio_none: return "none";
+ case mlt_audio_s16: return "s16";
+ case mlt_audio_s32: return "s32";
+ case mlt_audio_float: return "float";
+ }
+ return "invalid";
}
-int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
+/** Get the audio associated to the frame.
+ *
+ * You should express the desired format, frequency, channels, and samples as inputs. As long
+ * as the loader producer was used to generate this or the audioconvert filter
+ * was attached, then you will get the audio back in the format you desire.
+ * However, you do not always get the channels and samples you request depending
+ * on properties and filters. You do not need to supply a pre-allocated
+ * buffer, but you should always supply the desired audio format.
+ * The audio is always in interleaved format.
+ * You should use the \p mlt_sample_calculator to determine the number of samples you want.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param[out] buffer an audio buffer
+ * \param[in,out] format the audio format
+ * \param[in,out] frequency the sample rate
+ * \param[in,out] channels
+ * \param[in,out] samples the number of samples per frame
+ * \return true if error
+ */
+
+int mlt_frame_get_audio( mlt_frame this, void **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
{
- mlt_properties properties = mlt_frame_properties( this );
+ mlt_get_audio get_audio = mlt_frame_pop_audio( this );
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
int hide = mlt_properties_get_int( properties, "test_audio" );
+ mlt_audio_format requested_format = *format;
- if ( hide == 0 && this->get_audio != NULL )
+ if ( hide == 0 && get_audio != NULL )
{
- mlt_position position = mlt_frame_get_position( this );
- this->get_audio( this, buffer, format, frequency, channels, samples );
- mlt_frame_set_position( this, position );
+ get_audio( this, buffer, format, frequency, channels, samples );
+ mlt_properties_set_int( properties, "audio_frequency", *frequency );
+ mlt_properties_set_int( properties, "audio_channels", *channels );
+ mlt_properties_set_int( properties, "audio_samples", *samples );
+ mlt_properties_set_int( properties, "audio_format", *format );
+ if ( this->convert_audio )
+ this->convert_audio( this, buffer, format, requested_format );
}
else if ( mlt_properties_get_data( properties, "audio", NULL ) )
{
*buffer = mlt_properties_get_data( properties, "audio", NULL );
+ *format = mlt_properties_get_int( properties, "audio_format" );
*frequency = mlt_properties_get_int( properties, "audio_frequency" );
*channels = mlt_properties_get_int( properties, "audio_channels" );
*samples = mlt_properties_get_int( properties, "audio_samples" );
+ if ( this->convert_audio )
+ this->convert_audio( this, buffer, format, requested_format );
}
else
{
*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 )
+ mlt_properties_set_int( properties, "audio_frequency", *frequency );
+ mlt_properties_set_int( properties, "audio_channels", *channels );
+ mlt_properties_set_int( properties, "audio_samples", *samples );
+ mlt_properties_set_int( properties, "audio_format", *format );
+
+ switch( *format )
+ {
+ case mlt_image_none:
+ size = 0;
+ *buffer = NULL;
+ break;
+ case mlt_audio_s16:
+ size = *samples * *channels * sizeof( int16_t );
+ break;
+ case mlt_audio_s32:
+ size = *samples * *channels * sizeof( int32_t );
+ break;
+ case mlt_audio_float:
+ size = *samples * *channels * sizeof( float );
+ break;
+ }
+ if ( size )
+ *buffer = mlt_pool_alloc( size );
+ if ( *buffer )
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 );
}
- mlt_properties_set_int( properties, "audio_frequency", *frequency );
- mlt_properties_set_int( properties, "audio_channels", *channels );
- mlt_properties_set_int( properties, "audio_samples", *samples );
+ // TODO: This does not belong here
+ if ( *format == mlt_audio_s16 && mlt_properties_get( properties, "meta.volume" ) )
+ {
+ double value = mlt_properties_get_double( properties, "meta.volume" );
+
+ if ( value == 0.0 )
+ {
+ memset( *buffer, 0, *samples * *channels * 2 );
+ }
+ else if ( value != 1.0 )
+ {
+ int total = *samples * *channels;
+ int16_t *p = *buffer;
+ while ( total -- )
+ {
+ *p = *p * value;
+ p ++;
+ }
+ }
+
+ mlt_properties_set( properties, "meta.volume", NULL );
+ }
return 0;
}
+/** Set the audio on a frame.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param buffer an buffer containing audio samples
+ * \param format the format of the audio in the \p buffer
+ * \param size the total size of the buffer (optional)
+ * \param destructor a function that releases or deallocates the \p buffer
+ * \return true if error
+ */
+
+int mlt_frame_set_audio( mlt_frame this, void *buffer, mlt_audio_format format, int size, mlt_destructor destructor )
+{
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this ), "audio_format", format );
+ return mlt_properties_set_data( MLT_FRAME_PROPERTIES( this ), "audio", buffer, size, destructor, NULL );
+}
+
+/** Get audio on a frame as a waveform image.
+ *
+ * This generates an 8-bit grayscale image representation of the audio in a
+ * frame. Currently, this only really works for 2 channels.
+ * This allocates the bitmap using mlt_pool so you should release the return
+ * value with \p mlt_pool_release.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \param w the width of the image
+ * \param h the height of the image to create
+ * \return a pointer to a new bitmap
+ */
+
unsigned char *mlt_frame_get_waveform( mlt_frame this, int w, int h )
{
int16_t *pcm = NULL;
- mlt_properties properties = mlt_frame_properties( this );
- mlt_audio_format format = mlt_audio_pcm;
+ mlt_properties properties = MLT_FRAME_PROPERTIES( this );
+ mlt_audio_format format = mlt_audio_s16;
int frequency = 32000; // lower frequency available?
int channels = 2;
- double fps = mlt_properties_get_double( properties, "fps" );
+ double fps = mlt_profile_fps( NULL );
int samples = mlt_sample_calculator( fps, frequency, mlt_frame_get_position( this ) );
-
+
// Get the pcm data
- mlt_frame_get_audio( this, &pcm, &format, &frequency, &channels, &samples );
-
+ mlt_frame_get_audio( this, (void**)&pcm, &format, &frequency, &channels, &samples );
+
// Make an 8-bit buffer large enough to hold rendering
int size = w * h;
unsigned char *bitmap = ( unsigned char* )mlt_pool_alloc( size );
if ( bitmap != NULL )
memset( bitmap, 0, size );
mlt_properties_set_data( properties, "waveform", bitmap, size, ( mlt_destructor )mlt_pool_release, NULL );
-
+
// Render vertical lines
int16_t *ubound = pcm + samples * channels;
int skip = samples / w - 1;
int i, j, k;
-
+
// Iterate sample stream and along x coordinate
for ( i = 0; i < w && pcm < ubound; i++ )
{
{
// Determine sample's magnitude from 2s complement;
int pcm_magnitude = *pcm < 0 ? ~(*pcm) + 1 : *pcm;
- // The height of a line is the ratio of the magnitude multiplied by
+ // The height of a line is the ratio of the magnitude multiplied by
// half the vertical resolution
int height = ( int )( ( double )( pcm_magnitude ) / 32768 * h / 2 );
// Determine the starting y coordinate - left channel above center,
int displacement = ( h / 2 ) - ( 1 - j ) * height;
// Position buffer pointer using y coordinate, stride, and x coordinate
unsigned char *p = &bitmap[ i + displacement * w ];
-
+
// Draw vertical line
for ( k = 0; k < height; k++ )
p[ w * k ] = 0xFF;
-
+
pcm++;
}
pcm += skip * channels;
return bitmap;
}
+/** Get the end service that produced this frame.
+ *
+ * This fetches the first producer of the frame and not any producers that
+ * encapsulate it.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ * \return a producer
+ */
+
mlt_producer mlt_frame_get_original_producer( mlt_frame this )
{
if ( this != NULL )
- return mlt_properties_get_data( mlt_frame_properties( this ), "_producer", NULL );
+ return mlt_properties_get_data( MLT_FRAME_PROPERTIES( this ), "_producer", NULL );
return NULL;
}
+/** Destroy the frame.
+ *
+ * \public \memberof mlt_frame_s
+ * \param this a frame
+ */
+
void mlt_frame_close( mlt_frame this )
{
- if ( this != NULL && mlt_properties_dec_ref( mlt_frame_properties( this ) ) <= 0 )
+ if ( this != NULL && mlt_properties_dec_ref( MLT_FRAME_PROPERTIES( this ) ) <= 0 )
{
mlt_deque_close( this->stack_image );
mlt_deque_close( this->stack_audio );
+ while( mlt_deque_peek_back( this->stack_service ) )
+ mlt_service_close( mlt_deque_pop_back( this->stack_service ) );
+ mlt_deque_close( this->stack_service );
mlt_properties_close( &this->parent );
free( this );
}
/***** convenience functions *****/
-int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha )
-{
- int ret = 0;
- register int y0, y1, u0, u1, v0, v1;
- register int r, g, b;
- register uint8_t *d = yuv;
- register int i, j;
-
- for ( i = 0; i < height; i++ )
- {
- register uint8_t *s = rgba + ( stride * i );
- for ( j = 0; j < ( width / 2 ); j++ )
- {
- r = *s++;
- g = *s++;
- b = *s++;
- *alpha++ = *s++;
- RGB2YUV (r, g, b, y0, u0 , v0);
- r = *s++;
- g = *s++;
- b = *s++;
- *alpha++ = *s++;
- RGB2YUV (r, g, b, y1, u1 , v1);
- *d++ = y0;
- *d++ = (u0+u1) >> 1;
- *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;
-}
-
-int mlt_convert_rgb24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv )
-{
- int ret = 0;
- register int y0, y1, u0, u1, v0, v1;
- register int r, g, b;
- register uint8_t *d = yuv;
- register int i, j;
-
- for ( i = 0; i < height; i++ )
- {
- register uint8_t *s = rgb + ( stride * i );
- for ( j = 0; j < ( width / 2 ); j++ )
- {
- r = *s++;
- g = *s++;
- b = *s++;
- RGB2YUV (r, g, b, y0, u0 , v0);
- r = *s++;
- g = *s++;
- b = *s++;
- RGB2YUV (r, g, b, y1, u1 , v1);
- *d++ = y0;
- *d++ = (u0+u1) >> 1;
- *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_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv )
-{
- int ret = 0;
- 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;
-}
-
-uint8_t *mlt_resize_alpha( uint8_t *input, int owidth, int oheight, int iwidth, int iheight )
-{
- uint8_t *output = NULL;
-
- if ( input != NULL && ( iwidth != owidth || iheight != oheight ) )
- {
- iwidth = iwidth - ( iwidth % 2 );
- owidth = owidth - ( owidth % 2 );
-
- output = mlt_pool_alloc( owidth * oheight );
-
- // 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 + iwidth * ( iheight / 2 ) + ( iwidth / 2 );
- int in_line = - in_y_range * iwidth - in_x_range;
-
- int elements;
-
- // Fill whole section with black
- y = out_y_range - ( iheight / 2 );
- int blank_elements = owidth * y;
- elements = blank_elements;
- while ( elements -- )
- *out_line ++ = 0;
-
- int active_width = iwidth;
- int inactive_width = out_x_range - in_x_range;
- uint8_t *p = NULL;
- uint8_t *end = NULL;
-
- // 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;
-
- // We're in the input range for this row.
- p = in_middle + in_line;
- end = out_ptr + active_width;
- while ( out_ptr != end )
- *out_ptr ++ = *p ++;
-
- // Fill the outer part with black
- elements = inactive_width;
- while ( elements -- )
- *out_ptr ++ = 0;
-
- // Move to next input line
- in_line += iwidth;
-
- // Move to next output line
- out_line += owidth;
- }
-
- // Fill whole section with black
- elements = blank_elements;
- while ( elements -- )
- *out_line ++ = 0;
- }
-
- return output;
-}
-
-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 ++ = 16;
- *out_line ++ = 128;
- }
-
- int active_width = 2 * iwidth;
- int inactive_width = out_x_range - in_x_range;
- uint8_t *p = NULL;
- uint8_t *end = NULL;
-
- // 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 ++ = 16;
- *out_ptr ++ = 128;
- }
-
- // We're in the input range for this row.
- p = in_middle + in_line;
- end = out_ptr + active_width;
- while ( out_ptr != end )
- {
- *out_ptr ++ = *p ++;
- *out_ptr ++ = *p ++;
- }
-
- // Fill the outer part with black
- elements = inactive_width;
- while ( elements -- )
- {
- *out_ptr ++ = 16;
- *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 ++ = 16;
- *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 );
- uint8_t *alpha = mlt_frame_get_alpha_mask( this );
-
- 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 );
-
- // We should resize the alpha too
- alpha = mlt_resize_alpha( alpha, owidth, oheight, iwidth, iheight );
- if ( alpha != NULL )
- {
- mlt_properties_set_data( properties, "alpha", alpha, owidth * ( oheight + 1 ), ( mlt_destructor )mlt_pool_release, NULL );
- this->get_alpha_mask = NULL;
- }
-
- // 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.
-*/
+/** Determine the number of samples that belong in a frame at a time position.
+ *
+ * \public \memberof mlt_frame_s
+ * \param fps the frame rate
+ * \param frequency the sample rate
+ * \param position the time position
+ * \return the number of samples per channel
+ */
-uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
+int mlt_sample_calculator( float fps, int frequency, int64_t position )
{
- // 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" );
+ int samples = 0;
- // If width and height are correct, don't do anything
- if ( iwidth != owidth || iheight != oheight )
+ if ( fps )
{
- // 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 );
-
- // 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
- register uint8_t *out_line = output;
- register 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;
-
- // Generate the affine transform scaling values
- register int scale_width = ( iwidth << 16 ) / owidth;
- register int scale_height = ( iheight << 16 ) / oheight;
- register int base = 0;
-
- int outer = out_x_range * scale_width;
- int bottom = out_y_range * scale_height;
-
- // Loop for the entirety of our output height.
- for ( dy = - bottom; dy < bottom; dy += scale_height )
- {
- // Start at the beginning of the line
- out_ptr = out_line;
-
- // Pointer to the middle of the input line
- in_line = in_middle + ( dy >> 16 ) * istride;
-
- // Loop for the entirety of our output row.
- for ( dx = - outer; dx < outer; dx += scale_width )
- {
- base = dx >> 15;
- base &= 0xfffffffe;
- *out_ptr ++ = *( in_line + base );
- base &= 0xfffffffc;
- *out_ptr ++ = *( in_line + base + 1 );
- dx += scale_width;
- base = dx >> 15;
- base &= 0xfffffffe;
- *out_ptr ++ = *( in_line + base );
- base &= 0xfffffffc;
- *out_ptr ++ = *( in_line + base + 3 );
- }
-
- // 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;
+ /* Compute the cumulative number of samples until the start of this frame and the
+ cumulative number of samples until the start of the next frame. Round each to the
+ nearest integer and take the difference to determine the number of samples in
+ this frame.
+
+ This approach should prevent rounding errors that can accumulate over a large number
+ of frames causing A/V sync problems. */
+
+ int64_t samples_at_this =
+ (int64_t)( (double) position * (double) frequency / (double) fps +
+ ( position < 0 ? -0.5 : 0.5 ) );
+ int64_t samples_at_next =
+ (int64_t)( (double) (position + 1) * (double) frequency / (double) fps +
+ ( position < 0 ? -0.5 : 0.5 ) );
+ samples = (int)( samples_at_next - samples_at_this );
}
- // No change, return input
- return input;
+ return samples;
}
-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 *src, *dest;
- 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, &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, &src, format, &frequency_src, &channels_src, &samples_src );
- //fprintf( stderr, "mix: frame src samples %d channels %d\n", samples_src, channels_src );
-
- 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;
-
- // determine number of samples to process
- *samples = samples_src < samples_dest ? samples_src : samples_dest;
- *channels = channels_src < channels_dest ? channels_src : channels_dest;
- *buffer = dest;
- *frequency = frequency_dest;
-
- // Compute a smooth ramp over start to end
- float weight = weight_start;
- float weight_step = ( weight_end - weight_start ) / *samples;
-
- // 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;
- }
-
- return ret;
-}
+/** Determine the number of samples that belong before a time position.
+ *
+ * \public \memberof mlt_frame_s
+ * \param fps the frame rate
+ * \param frequency the sample rate
+ * \param position the time position
+ * \return the number of samples per channel
+ * \bug Will this break when mlt_position is converted to double?
+ */
-int mlt_sample_calculator( float fps, int frequency, int64_t position )
+int64_t mlt_sample_calculator_to_now( float fps, int frequency, int64_t position )
{
- int samples = 0;
+ int64_t samples = 0;
- if ( ( int )( fps * 100 ) == 2997 )
- {
- samples = frequency / 30;
-
- switch ( frequency )
- {
- 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;
- }
- }
- else if ( fps != 0 )
+ if ( fps )
{
- samples = frequency / fps;
+ samples = (int64_t)( (double) position * (double) frequency / (double) fps +
+ ( position < 0 ? -0.5 : 0.5 ) );
}
return samples;
projects / mlt / blobdiff