/* * mlt_frame.h -- interface for all frame classes * Copyright (C) 2003-2004 Ushodaya Enterprises Limited * Author: Charles Yates * * 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 * Lesser General Public License for more details. * * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef _MLT_FRAME_H_ #define _MLT_FRAME_H_ #include "mlt_properties.h" #include "mlt_deque.h" typedef int ( *mlt_get_image )( mlt_frame self, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable ); typedef int ( *mlt_get_audio )( mlt_frame self, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples ); struct mlt_frame_s { /* We're extending properties here */ struct mlt_properties_s parent; /* Virtual methods */ uint8_t * ( *get_alpha_mask )( mlt_frame self ); /* Private properties */ mlt_deque stack_image; mlt_deque stack_audio; mlt_deque stack_service; }; #define MLT_FRAME_PROPERTIES( frame ) ( &( frame )->parent ) #define MLT_FRAME_SERVICE_STACK( frame ) ( ( frame )->stack_service ) #define MLT_FRAME_IMAGE_STACK( frame ) ( ( frame )->stack_image ) #define MLT_FRAME_AUDIO_STACK( frame ) ( ( frame )->stack_audio ) extern mlt_frame mlt_frame_init( ); extern mlt_properties mlt_frame_properties( mlt_frame self ); extern int mlt_frame_is_test_card( mlt_frame self ); extern int mlt_frame_is_test_audio( mlt_frame self ); extern double mlt_frame_get_aspect_ratio( mlt_frame self ); extern int mlt_frame_set_aspect_ratio( mlt_frame self, double value ); extern mlt_position mlt_frame_get_position( mlt_frame self ); extern int mlt_frame_set_position( mlt_frame self, mlt_position value ); extern void mlt_frame_replace_image( mlt_frame self, uint8_t *image, mlt_image_format format, int width, int height ); extern int mlt_frame_get_image( mlt_frame self, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable ); extern uint8_t *mlt_frame_get_alpha_mask( mlt_frame self ); extern int mlt_frame_get_audio( mlt_frame self, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples ); extern unsigned char *mlt_frame_get_waveform( mlt_frame self, int w, int h ); extern int mlt_frame_push_get_image( mlt_frame self, mlt_get_image get_image ); extern mlt_get_image mlt_frame_pop_get_image( mlt_frame self ); extern int mlt_frame_push_frame( mlt_frame self, mlt_frame that ); extern mlt_frame mlt_frame_pop_frame( mlt_frame self ); extern int mlt_frame_push_service( mlt_frame self, void *that ); extern void *mlt_frame_pop_service( mlt_frame self ); extern int mlt_frame_push_service_int( mlt_frame self, int that ); extern int mlt_frame_pop_service_int( mlt_frame self ); extern int mlt_frame_push_audio( mlt_frame self, void *that ); extern void *mlt_frame_pop_audio( mlt_frame self ); extern mlt_deque mlt_frame_service_stack( mlt_frame self ); extern mlt_producer mlt_frame_get_original_producer( mlt_frame self ); extern void mlt_frame_close( mlt_frame self ); /* convenience functions */ extern int mlt_convert_yuv422_to_rgb24a( uint8_t *yuv, uint8_t *rgba, unsigned int total ); extern int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha ); extern int mlt_convert_rgb24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv ); extern int mlt_convert_bgr24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha ); extern int mlt_convert_argb_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha ); extern int mlt_convert_bgr24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv ); extern int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv ); extern uint8_t *mlt_frame_resize_yuv422( mlt_frame self, int owidth, int oheight ); extern uint8_t *mlt_frame_rescale_yuv422( mlt_frame self, int owidth, int oheight ); extern void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight ); 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 ); 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 ); extern int mlt_sample_calculator( float fps, int frequency, int64_t position ); extern int64_t mlt_sample_calculator_to_now( float fps, int frequency, int64_t position ); /* this macro scales rgb into the yuv gamut, y is scaled by 219/255 and uv by 224/255 */ #define RGB2YUV(r, g, b, y, u, v)\ y = ((263*r + 516*g + 100*b) >> 10) + 16;\ u = ((-152*r - 298*g + 450*b) >> 10) + 128;\ v = ((450*r - 377*g - 73*b) >> 10) + 128; /* this macro assumes the user has already scaled their rgb down into the broadcast limits */ #define RGB2YUV_UNSCALED(r, g, b, y, u, v)\ y = (299*r + 587*g + 114*b) >> 10;\ u = ((-169*r - 331*g + 500*b) >> 10) + 128;\ v = ((500*r - 419*g - 81*b) >> 10) + 128;\ y = y < 16 ? 16 : y;\ u = u < 16 ? 16 : u;\ v = v < 16 ? 16 : v;\ y = y > 235 ? 235 : y;\ u = u > 240 ? 240 : u;\ v = v > 240 ? 240 : v #define YUV2RGB( y, u, v, r, g, b ) \ r = ((1192 * ( y - 16 ) + 1634 * ( v - 128 ) ) >> 10 ); \ g = ((1192 * ( y - 16 ) - 832 * ( v - 128 ) - 400 * ( u - 128 ) ) >> 10 ); \ b = ((1192 * ( y - 16 ) + 2066 * ( u - 128 ) ) >> 10 ); \ r = r < 0 ? 0 : r > 255 ? 255 : r; \ g = g < 0 ? 0 : g > 255 ? 255 : g; \ b = b < 0 ? 0 : b > 255 ? 255 : b; #endif