producer_colour
[melted] / src / framework / mlt_frame.h
1 /*
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>
5 *
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.
10 *
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.
15 *
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.
19 */
20
21 #ifndef _MLT_FRAME_H_
22 #define _MLT_FRAME_H_
23
24 #include "mlt_properties.h"
25 #include "mlt_deque.h"
26
27 typedef enum
28 {
29 mlt_image_none = 0,
30 mlt_image_rgb24,
31 mlt_image_rgb24a,
32 mlt_image_yuv422,
33 mlt_image_yuv420p
34 }
35 mlt_image_format;
36
37 typedef enum
38 {
39 mlt_video_standard_pal = 0,
40 mlt_video_standard_ntsc
41 }
42 mlt_video_standard;
43
44 typedef enum
45 {
46 mlt_audio_none = 0,
47 mlt_audio_pcm
48 }
49 mlt_audio_format;
50
51 typedef int ( *mlt_get_image )( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable );
52
53 struct mlt_frame_s
54 {
55 // We're extending properties here
56 struct mlt_properties_s parent;
57
58 // Virtual methods
59 int ( *get_audio )( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples );
60 uint8_t * ( *get_alpha_mask )( mlt_frame this );
61
62 // Private properties
63 mlt_deque stack_get_image;
64 mlt_deque stack_frame;
65 mlt_deque stack_service;
66 };
67
68 extern mlt_frame mlt_frame_init( );
69 extern mlt_properties mlt_frame_properties( mlt_frame this );
70 extern int mlt_frame_is_test_card( mlt_frame this );
71 extern int mlt_frame_is_test_audio( mlt_frame this );
72 extern double mlt_frame_get_aspect_ratio( mlt_frame this );
73 extern int mlt_frame_set_aspect_ratio( mlt_frame this, double value );
74 extern mlt_position mlt_frame_get_position( mlt_frame this );
75 extern int mlt_frame_set_position( mlt_frame this, mlt_position value );
76
77 extern int mlt_frame_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable );
78 extern uint8_t *mlt_frame_get_alpha_mask( mlt_frame this );
79 extern int mlt_frame_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples );
80
81 extern int mlt_frame_push_get_image( mlt_frame this, mlt_get_image get_image );
82 extern mlt_get_image mlt_frame_pop_get_image( mlt_frame this );
83 extern int mlt_frame_push_frame( mlt_frame this, mlt_frame that );
84 extern mlt_frame mlt_frame_pop_frame( mlt_frame this );
85 extern int mlt_frame_push_service( mlt_frame this, void *that );
86 extern void *mlt_frame_pop_service( mlt_frame this );
87 extern void mlt_frame_close( mlt_frame this );
88
89 /* convenience functions */
90 extern int mlt_convert_rgb24a_to_yuv422( uint8_t *rgba, int width, int height, int stride, uint8_t *yuv, uint8_t *alpha );
91 extern int mlt_convert_rgb24_to_yuv422( uint8_t *rgb, int width, int height, int stride, uint8_t *yuv );
92 extern int mlt_convert_yuv420p_to_yuv422( uint8_t *yuv420p, int width, int height, int stride, uint8_t *yuv );
93 extern uint8_t *mlt_frame_resize_yuv422( mlt_frame this, int owidth, int oheight );
94 extern uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight );
95 extern void mlt_resize_yuv422( uint8_t *output, int owidth, int oheight, uint8_t *input, int iwidth, int iheight );
96 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 );
97 extern int mlt_sample_calculator( float fps, int frequency, int64_t position );
98
99 /* this macro scales rgb into the yuv gamut, y is scaled by 219/255 and uv by 224/255 */
100 #define RGB2YUV(r, g, b, y, u, v)\
101 y = ((257*r + 504*g + 98*b) >> 10) + 16;\
102 u = ((-148*r - 291*g + 439*b) >> 10) + 128;\
103 v = ((439*r - 368*g - 71*b) >> 10) + 128;\
104 y = y < 16 ? 16 : y;\
105 u = u < 16 ? 16 : u;\
106 v = v < 16 ? 16 : v;\
107 y = y > 235 ? 235 : y;\
108 u = u > 240 ? 240 : u;\
109 v = v > 240 ? 240 : v
110
111 /* this macro assumes the user has already scaled their rgb down into the broadcast limits */
112 #define RGB2YUV_UNSCALED(r, g, b, y, u, v)\
113 y = (299*r + 587*g + 114*b) >> 10;\
114 u = ((-169*r - 331*g + 500*b) >> 10) + 128;\
115 v = ((500*r - 419*g - 81*b) >> 10) + 128;\
116 y = y < 16 ? 16 : y;\
117 u = u < 16 ? 16 : u;\
118 v = v < 16 ? 16 : v;\
119 y = y > 235 ? 235 : y;\
120 u = u > 240 ? 240 : u;\
121 v = v > 240 ? 240 : v
122
123 #endif
124