1 /*******************************************************************************
2 * video_output.h : video output thread
4 *******************************************************************************
5 * This module describes the programming interface for video output threads.
6 * It includes functions allowing to open a new thread, send pictures to a
7 * thread, and destroy a previously oppenned video output thread.
8 *******************************************************************************/
10 /*******************************************************************************
11 * vout_tables_t: pre-calculated convertion tables
12 *******************************************************************************
13 * These tables are used by convertion and scaling functions.
14 *******************************************************************************/
15 typedef struct vout_tables_s
17 void * p_base; /* base for all translation tables */
20 struct { u16 *p_red, *p_green, *p_blue; } rgb16; /* color 15, 16 bpp */
21 struct { u32 *p_red, *p_green, *p_blue; } rgb32; /* color 24, 32 bpp */
22 struct { u16 *p_gray; } gray16; /* gray 15, 16 bpp */
23 struct { u32 *p_gray; } gray32; /* gray 24, 32 bpp */
27 /*******************************************************************************
28 * vout_convert_t: convertion function
29 *******************************************************************************
30 * This is the prototype common to all convertion functions. The type of p_pic
31 * will change depending of the screen depth treated.
33 * p_vout video output thread
34 * p_pic picture address (start address in picture)
35 * p_y, p_u, p_v Y,U,V samples addresses
36 * i_width Y samples width
37 * i_height Y samples height
38 * i_eol number of Y samples to reach the next line
39 * i_pic_eol number or pixels to reach the next line
40 * i_scale if non 0, vertical scaling is 1 - 1/i_scale
41 * i_matrix_coefficients matrix coefficients
43 * start x + i_width < picture width
44 * start y + i_height * (scaling factor) < picture height
46 *******************************************************************************/
47 typedef void (vout_convert_t)( p_vout_thread_t p_vout, void *p_pic,
48 yuv_data_t *p_y, yuv_data_t *p_u, yuv_data_t *p_v,
49 int i_width, int i_height, int i_eol, int i_pic_eol,
50 int i_scale, int i_matrix_coefficients );
52 /*******************************************************************************
53 * vout_scale_t: scaling function
54 *******************************************************************************
55 * When a picture can't be scaled unsing the fast i_y_scale parameter of a
56 * transformation, it is rendered in a temporary buffer then scaled using a
57 * totally accurate (but also very slow) method.
58 * This is the prototype common to all scaling functions. The types of p_buffer
59 * and p_pic will change depending of the screen depth treated.
61 * p_vout video output thread
62 * p_pic picture address (start address in picture)
63 * p_buffer source picture
64 * i_width buffer width
65 * i_height buffer height
66 * i_eol number of pixels to reach next buffer line
67 * i_pic_eol number of pixels to reach next picture line
68 * f_alpha, f_beta horizontal and vertical scaling factors
69 *******************************************************************************/
70 typedef void (vout_scale_t)( p_vout_thread_t p_vout, void *p_pic, void *p_buffer,
71 int i_width, int i_height, int i_eol, int i_pic_eol,
72 float f_alpha, float f_beta );
74 /*******************************************************************************
75 * vout_thread_t: video output thread descriptor
76 *******************************************************************************
77 * Any independant video output device, such as an X11 window or a GGI device,
78 * is represented by a video output thread, and described using following
80 *******************************************************************************/
81 typedef struct vout_thread_s
83 /* Thread properties and lock */
84 boolean_t b_die; /* `die' flag */
85 boolean_t b_error; /* `error' flag */
86 boolean_t b_active; /* `active' flag */
87 pthread_t thread_id; /* id for pthread functions */
88 pthread_mutex_t lock; /* thread lock */
89 int * pi_status; /* temporary status flag */
90 p_vout_sys_t p_sys; /* system output method */
92 /* Current display properties */
93 boolean_t b_info; /* print additionnal informations */
94 boolean_t b_grayscale; /* color or grayscale display */
95 int i_width; /* current output method width */
96 int i_height; /* current output method height */
97 int i_bytes_per_line;/* bytes per line (including virtual) */
98 int i_screen_depth; /* bits per pixel - FIXED */
99 int i_bytes_per_pixel; /* real screen depth - FIXED */
100 float f_x_ratio; /* horizontal display ratio */
101 float f_y_ratio; /* vertical display ratio */
102 float f_gamma; /* gamma */
104 /* Changed properties values - some of them are treated directly by the
105 * thread, the over may be ignored or handled by vout_SysManage */
106 //?? info, grayscale, width, height, bytes per line, x ratio, y ratio, gamma
107 boolean_t b_gamma_change; /* gamma change indicator */
108 int i_new_width; /* new width */
109 int i_new_height; /* new height */
112 /* Statistics - these numbers are not supposed to be accurate, but are a
113 * good indication of the thread status */
114 count_t c_loops; /* number of loops */
115 count_t c_idle_loops; /* number of idle loops */
116 count_t c_fps_samples; /* picture counts */
117 mtime_t fps_sample[ VOUT_FPS_SAMPLES ]; /* FPS samples dates */
121 /* Additionnal video debugging informations */
122 mtime_t picture_render_time; /* last picture rendering time */
125 /* Video heap and translation tables */
126 picture_t p_picture[VOUT_MAX_PICTURES]; /* pictures */
127 vout_tables_t tables; /* translation tables */
128 vout_convert_t * p_ConvertYUV420; /* YUV 4:2:0 converter */
129 vout_convert_t * p_ConvertYUV422; /* YUV 4:2:2 converter */
130 vout_convert_t * p_ConvertYUV444; /* YUV 4:4:4 converter */
131 vout_scale_t * p_Scale; /* scaler */
134 /*******************************************************************************
136 *******************************************************************************/
137 vout_thread_t * vout_CreateThread (
139 char *psz_display, Window root_window,
141 int i_width, int i_height, int *pi_status
144 void vout_DestroyThread ( vout_thread_t *p_vout, int *pi_status );
146 picture_t * vout_CreatePicture ( vout_thread_t *p_vout, int i_type,
147 int i_width, int i_height );
148 void vout_DestroyPicture ( vout_thread_t *p_vout, picture_t *p_pic );
149 void vout_DisplayPicture ( vout_thread_t *p_vout, picture_t *p_pic );
150 void vout_LinkPicture ( vout_thread_t *p_vout, picture_t *p_pic );
151 void vout_UnlinkPicture ( vout_thread_t *p_vout, picture_t *p_pic );