2 * mlt_frame.h -- interface for all frame classes
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 #include "mlt_properties.h"
25 #include "mlt_deque.h"
29 mlt_video_standard_pal
= 0,
30 mlt_video_standard_ntsc
41 typedef int ( *mlt_get_image
)( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
);
45 // We're extending properties here
46 struct mlt_properties_s parent
;
49 int ( *get_audio
)( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
);
50 uint8_t * ( *get_alpha_mask
)( mlt_frame
this );
53 mlt_deque stack_image
;
54 mlt_deque stack_audio
;
57 extern mlt_frame
mlt_frame_init( );
58 extern mlt_properties
mlt_frame_properties( mlt_frame
this );
59 extern int mlt_frame_is_test_card( mlt_frame
this );
60 extern int mlt_frame_is_test_audio( mlt_frame
this );
61 extern double mlt_frame_get_aspect_ratio( mlt_frame
this );
62 extern int mlt_frame_set_aspect_ratio( mlt_frame
this, double value
);
63 extern mlt_position
mlt_frame_get_position( mlt_frame
this );
64 extern int mlt_frame_set_position( mlt_frame
this, mlt_position value
);
66 extern int mlt_frame_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
);
67 extern uint8_t *mlt_frame_get_alpha_mask( mlt_frame
this );
68 extern int mlt_frame_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
);
70 extern int mlt_frame_push_get_image( mlt_frame
this, mlt_get_image get_image
);
71 extern mlt_get_image
mlt_frame_pop_get_image( mlt_frame
this );
72 extern int mlt_frame_push_frame( mlt_frame
this, mlt_frame that
);
73 extern mlt_frame
mlt_frame_pop_frame( mlt_frame
this );
74 extern int mlt_frame_push_service( mlt_frame
this, void *that
);
75 extern void *mlt_frame_pop_service( mlt_frame
this );
77 extern int mlt_frame_push_audio( mlt_frame
this, void *that
);
78 extern void *mlt_frame_pop_audio( mlt_frame
this );
80 extern void mlt_frame_close( mlt_frame
this );
82 /* convenience functions */
83 extern int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba
, int width
, int height
, int stride
, uint8_t *yuv
, uint8_t *alpha
);
84 extern int mlt_convert_rgb24_to_yuv422( uint8_t *rgb
, int width
, int height
, int stride
, uint8_t *yuv
);
85 extern int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p
, int width
, int height
, int stride
, uint8_t *yuv
);
86 extern uint8_t *mlt_frame_resize_yuv422( mlt_frame
this, int owidth
, int oheight
);
87 extern uint8_t *mlt_frame_rescale_yuv422( mlt_frame
this, int owidth
, int oheight
);
88 extern void mlt_resize_yuv422( uint8_t *output
, int owidth
, int oheight
, uint8_t *input
, int iwidth
, int iheight
);
89 extern 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
);
90 extern int mlt_sample_calculator( float fps
, int frequency
, int64_t position
);
92 /* this macro scales rgb into the yuv gamut, y is scaled by 219/255 and uv by 224/255 */
93 #define RGB2YUV(r, g, b, y, u, v)\
94 y = ((257*r + 504*g + 98*b) >> 10) + 16;\
95 u = ((-148*r - 291*g + 439*b) >> 10) + 128;\
96 v = ((439*r - 368*g - 71*b) >> 10) + 128;\
100 y = y > 235 ? 235 : y;\
101 u = u > 240 ? 240 : u;\
102 v = v > 240 ? 240 : v
104 /* this macro assumes the user has already scaled their rgb down into the broadcast limits */
105 #define RGB2YUV_UNSCALED(r, g, b, y, u, v)\
106 y = (299*r + 587*g + 114*b) >> 10;\
107 u = ((-169*r - 331*g + 500*b) >> 10) + 128;\
108 v = ((500*r - 419*g - 81*b) >> 10) + 128;\
109 y = y < 16 ? 16 : y;\
110 u = u < 16 ? 16 : u;\
111 v = v < 16 ? 16 : v;\
112 y = y > 235 ? 235 : y;\
113 u = u > 240 ? 240 : u;\
114 v = v > 240 ? 240 : v