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119 lines
6.1 KiB
119 lines
6.1 KiB
/*
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* mlt_frame.h -- interface for all frame classes
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* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
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* Author: Charles Yates <charles.yates@pandora.be>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _MLT_FRAME_H_
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#define _MLT_FRAME_H_
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#include "mlt_properties.h"
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#include "mlt_deque.h"
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typedef int ( *mlt_get_image )( mlt_frame self, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable );
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typedef int ( *mlt_get_audio )( mlt_frame self, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples );
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struct mlt_frame_s
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{
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/* We're extending properties here */
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struct mlt_properties_s parent;
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/* Virtual methods */
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uint8_t * ( *get_alpha_mask )( mlt_frame self );
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/* Private properties */
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mlt_deque stack_image;
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mlt_deque stack_audio;
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mlt_deque stack_service;
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};
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#define MLT_FRAME_PROPERTIES( frame ) ( &( frame )->parent )
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#define MLT_FRAME_SERVICE_STACK( frame ) ( ( frame )->stack_service )
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#define MLT_FRAME_IMAGE_STACK( frame ) ( ( frame )->stack_image )
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#define MLT_FRAME_AUDIO_STACK( frame ) ( ( frame )->stack_audio )
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extern mlt_frame mlt_frame_init( );
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extern mlt_properties mlt_frame_properties( mlt_frame self );
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extern int mlt_frame_is_test_card( mlt_frame self );
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extern int mlt_frame_is_test_audio( mlt_frame self );
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extern double mlt_frame_get_aspect_ratio( mlt_frame self );
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extern int mlt_frame_set_aspect_ratio( mlt_frame self, double value );
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extern mlt_position mlt_frame_get_position( mlt_frame self );
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extern int mlt_frame_set_position( mlt_frame self, mlt_position value );
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extern void mlt_frame_replace_image( mlt_frame self, uint8_t *image, mlt_image_format format, int width, int height );
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extern int mlt_frame_get_image( mlt_frame self, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable );
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extern uint8_t *mlt_frame_get_alpha_mask( mlt_frame self );
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extern int mlt_frame_get_audio( mlt_frame self, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples );
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extern unsigned char *mlt_frame_get_waveform( mlt_frame self, int w, int h );
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extern int mlt_frame_push_get_image( mlt_frame self, mlt_get_image get_image );
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extern mlt_get_image mlt_frame_pop_get_image( mlt_frame self );
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extern int mlt_frame_push_frame( mlt_frame self, mlt_frame that );
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extern mlt_frame mlt_frame_pop_frame( mlt_frame self );
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extern int mlt_frame_push_service( mlt_frame self, void *that );
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extern void *mlt_frame_pop_service( mlt_frame self );
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extern int mlt_frame_push_service_int( mlt_frame self, int that );
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extern int mlt_frame_pop_service_int( mlt_frame self );
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extern int mlt_frame_push_audio( mlt_frame self, void *that );
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extern void *mlt_frame_pop_audio( mlt_frame self );
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extern mlt_deque mlt_frame_service_stack( mlt_frame self );
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extern mlt_producer mlt_frame_get_original_producer( mlt_frame self );
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extern void mlt_frame_close( mlt_frame self );
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/* convenience functions */
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extern int mlt_convert_yuv422_to_rgb24a( uint8_t *yuv, uint8_t *rgba, unsigned int total );
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extern int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha );
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extern int mlt_convert_rgb24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv );
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extern int mlt_convert_bgr24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha );
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extern int mlt_convert_argb_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha );
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extern int mlt_convert_bgr24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv );
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extern int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv );
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extern uint8_t *mlt_frame_resize_yuv422( mlt_frame self, int owidth, int oheight );
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extern uint8_t *mlt_frame_rescale_yuv422( mlt_frame self, int owidth, int oheight );
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extern void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight );
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extern int mlt_frame_mix_audio( mlt_frame self, mlt_frame that, float weight_start, float weight_end, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples );
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extern int mlt_frame_combine_audio( mlt_frame self, mlt_frame that, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples );
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extern int mlt_sample_calculator( float fps, int frequency, int64_t position );
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extern int64_t mlt_sample_calculator_to_now( float fps, int frequency, int64_t position );
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/* this macro scales rgb into the yuv gamut, y is scaled by 219/255 and uv by 224/255 */
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#define RGB2YUV(r, g, b, y, u, v)\
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y = ((263*r + 516*g + 100*b) >> 10) + 16;\
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u = ((-152*r - 298*g + 450*b) >> 10) + 128;\
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v = ((450*r - 377*g - 73*b) >> 10) + 128;
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/* this macro assumes the user has already scaled their rgb down into the broadcast limits */
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#define RGB2YUV_UNSCALED(r, g, b, y, u, v)\
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y = (299*r + 587*g + 114*b) >> 10;\
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u = ((-169*r - 331*g + 500*b) >> 10) + 128;\
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v = ((500*r - 419*g - 81*b) >> 10) + 128;\
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y = y < 16 ? 16 : y;\
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u = u < 16 ? 16 : u;\
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v = v < 16 ? 16 : v;\
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y = y > 235 ? 235 : y;\
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u = u > 240 ? 240 : u;\
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v = v > 240 ? 240 : v
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#define YUV2RGB( y, u, v, r, g, b ) \
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r = ((1192 * ( y - 16 ) + 1634 * ( v - 128 ) ) >> 10 ); \
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g = ((1192 * ( y - 16 ) - 832 * ( v - 128 ) - 400 * ( u - 128 ) ) >> 10 ); \
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b = ((1192 * ( y - 16 ) + 2066 * ( u - 128 ) ) >> 10 ); \
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r = r < 0 ? 0 : r > 255 ? 255 : r; \
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g = g < 0 ? 0 : g > 255 ? 255 : g; \
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b = b < 0 ? 0 : b > 255 ? 255 : b;
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#endif
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