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/*****************************************************************************
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* video_output.h : video output thread
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* (c)1999 VideoLAN
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*****************************************************************************
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* This module describes the programming interface for video output threads.
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* It includes functions allowing to open a new thread, send pictures to a
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* thread, and destroy a previously oppenned video output thread.
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*****************************************************************************/
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/*****************************************************************************
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* vout_yuv_convert_t: YUV convertion function
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*****************************************************************************
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* This is the prototype common to all convertion functions. The type of p_pic
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* will change depending of the screen depth treated.
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* Parameters:
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* p_vout video output thread
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* p_pic picture address
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* p_y, p_u, p_v Y,U,V samples addresses
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* i_width, i_height Y samples extension
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* i_pic_width, i_pic_height picture extension
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* i_pic_line_width picture total line width
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* i_matrix_coefficients matrix coefficients
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* Picture width and source dimensions must be multiples of 16.
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*****************************************************************************/
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typedef void (vout_yuv_convert_t)( p_vout_thread_t p_vout, void *p_pic,
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yuv_data_t *p_y, yuv_data_t *p_u, yuv_data_t *p_v,
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int i_width, int i_height,
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int i_pic_width, int i_pic_height, int i_pic_line_width,
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int i_matrix_coefficients );
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/*****************************************************************************
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* vout_yuv_t: pre-calculated YUV convertion tables
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*****************************************************************************
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* These tables are used by convertion and scaling functions.
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*****************************************************************************/
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typedef struct vout_yuv_s
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{
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/* Convertion functions */
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vout_yuv_convert_t * p_Convert420; /* YUV 4:2:0 converter */
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vout_yuv_convert_t * p_Convert422; /* YUV 4:2:2 converter */
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vout_yuv_convert_t * p_Convert444; /* YUV 4:4:4 converter */
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/* Pre-calculated convertion tables */
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void * p_base; /* base for all conversion tables */
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union
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{
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u8 * p_gray8; /* gray 8 bits table */
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u16 * p_gray16; /* gray 16 bits table */
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u32 * p_gray32; /* gray 32 bits table */
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u8 * p_rgb8; /* RGB 8 bits table */
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u16 * p_rgb16; /* RGB 16 bits table */
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u32 * p_rgb32; /* RGB 32 bits table */
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} yuv;
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/* Temporary convertion buffer and offset array */
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void * p_buffer; /* convertion buffer */
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int * p_offset; /* offset array */
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} vout_yuv_t;
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/*****************************************************************************
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* vout_buffer_t: rendering buffer
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*****************************************************************************
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* This structure store informations about a buffer. Buffers are not completely
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* cleared between displays, and modified areas need to be stored.
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*****************************************************************************/
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typedef struct vout_buffer_s
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{
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/* Picture area */
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int i_pic_x, i_pic_y; /* picture position */
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int i_pic_width, i_pic_height; /* picture extension */
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/* Other areas - only vertical extensions of areas are stored */
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int i_areas; /* number of areas */
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int pi_area_begin[VOUT_MAX_AREAS]; /* beginning of area */
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int pi_area_end[VOUT_MAX_AREAS]; /* end of area */
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/* Picture data */
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byte_t * p_data; /* memory address */
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} vout_buffer_t;
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/*****************************************************************************
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* vout_thread_t: video output thread descriptor
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*****************************************************************************
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* Any independant video output device, such as an X11 window or a GGI device,
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* is represented by a video output thread, and described using the following
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* structure.
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*****************************************************************************/
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typedef int (vout_sys_create_t) ( p_vout_thread_t p_vout,
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char *psz_display, int i_root_window );
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typedef int (vout_sys_init_t) ( p_vout_thread_t p_vout );
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typedef void (vout_sys_end_t) ( p_vout_thread_t p_vout );
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typedef void (vout_sys_destroy_t) ( p_vout_thread_t p_vout );
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typedef int (vout_sys_manage_t) ( p_vout_thread_t p_vout );
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typedef void (vout_sys_display_t) ( p_vout_thread_t p_vout );
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typedef void (vout_set_palette_t) ( p_vout_thread_t p_vout, u16 *red,
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u16 *green, u16 *blue, u16 *transp );
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typedef struct vout_thread_s
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{
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/* Thread properties and lock */
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boolean_t b_die; /* `die' flag */
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boolean_t b_error; /* `error' flag */
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boolean_t b_active; /* `active' flag */
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vlc_thread_t thread_id; /* id for pthread functions */
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vlc_mutex_t picture_lock; /* picture heap lock */
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vlc_mutex_t subpicture_lock; /* subpicture heap lock */
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vlc_mutex_t change_lock; /* thread change lock */
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int * pi_status; /* temporary status flag */
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p_vout_sys_t p_sys; /* system output method */
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/* Current display properties */
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u16 i_changes; /* changes made to the thread */
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int i_width; /* current output method width */
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int i_height; /* current output method height */
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int i_bytes_per_line; /* bytes per line (incl. virtual) */
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int i_screen_depth; /* significant bpp: 8, 15, 16 or 24 */
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int i_bytes_per_pixel;/* real screen depth: 1, 2, 3 or 4 */
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float f_gamma; /* gamma */
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/* Color masks and shifts in RGB mode - masks are set by system
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* initialization, shifts are calculated. A pixel color value can be
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* obtained using the formula ((value >> rshift) << lshift) */
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u32 i_red_mask; /* red mask */
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u32 i_green_mask; /* green mask */
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u32 i_blue_mask; /* blue mask */
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int i_red_lshift, i_red_rshift; /* red shifts */
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int i_green_lshift, i_green_rshift; /* green shifts */
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int i_blue_lshift, i_blue_rshift; /* blue shifts */
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/* Useful pre-calculated pixel values - these are not supposed to be
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* accurate values, but rather values looking nice, given their usage. */
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u32 i_white_pixel; /* white */
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u32 i_black_pixel; /* black */
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u32 i_gray_pixel; /* gray */
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u32 i_blue_pixel; /* blue */
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/* Plugins */
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void * p_vout_plugin; /* video output plugin */
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vout_sys_create_t * p_sys_create; /* allocate output method */
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vout_sys_init_t * p_sys_init; /* initialize output method */
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vout_sys_end_t * p_sys_end; /* terminate output method */
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vout_sys_destroy_t * p_sys_destroy; /* destroy output method */
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vout_sys_manage_t * p_sys_manage; /* handle events */
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vout_sys_display_t * p_sys_display; /* display rendered image */
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vout_set_palette_t * p_set_palette; /* sets 8bpp palette */
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/* Pictures and rendering properties */
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boolean_t b_grayscale; /* color or grayscale display */
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boolean_t b_info; /* print additionnal informations */
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boolean_t b_interface; /* render interface */
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boolean_t b_scale; /* allow picture scaling */
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/* Idle screens management */
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mtime_t last_display_date; /* last non idle display date */
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mtime_t last_idle_date; /* last idle display date */
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#ifdef STATS
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/* Statistics - these numbers are not supposed to be accurate, but are a
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* good indication of the thread status */
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mtime_t render_time; /* last picture render time */
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count_t c_fps_samples; /* picture counts */
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mtime_t p_fps_sample[VOUT_FPS_SAMPLES]; /* FPS samples dates */
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#endif
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/* Rendering buffers */
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int i_buffer_index; /* buffer index */
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vout_buffer_t p_buffer[2]; /* buffers properties */
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/* Videos heap and translation tables */
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picture_t p_picture[VOUT_MAX_PICTURES]; /* pictures */
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subpicture_t p_subpicture[VOUT_MAX_PICTURES]; /* subpictures */
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int i_pictures; /* current heap size */
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vout_yuv_t yuv; /* translation tables */
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/* Bitmap fonts */
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p_vout_font_t p_default_font; /* default font */
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p_vout_font_t p_large_font; /* large font */
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/* Synchronisation informations - synchro level is updated by the vout
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* thread and read by decoder threads */
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int i_synchro_level; /* trashing level */
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} vout_thread_t;
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/* Flags for changes - these flags are set in the i_changes field when another
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* thread changed a variable */
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#define VOUT_INFO_CHANGE 0x0001 /* b_info changed */
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#define VOUT_GRAYSCALE_CHANGE 0x0002 /* b_grayscale changed */
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#define VOUT_INTF_CHANGE 0x0004 /* b_interface changed */
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#define VOUT_SCALE_CHANGE 0x0008 /* b_scale changed */
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#define VOUT_SIZE_CHANGE 0x0200 /* size changed */
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#define VOUT_DEPTH_CHANGE 0x0400 /* depth changed */
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#define VOUT_GAMMA_CHANGE 0x0010 /* gamma changed */
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#define VOUT_YUV_CHANGE 0x0800 /* change yuv tables */
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#define VOUT_NODISPLAY_CHANGE 0xff00 /* changes which forbidden display */
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/*****************************************************************************
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* Macros
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*****************************************************************************/
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/* RGB2PIXEL: assemble RGB components to a pixel value, returns a u32 */
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#define RGB2PIXEL( p_vout, i_red, i_green, i_blue ) \
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(((((u32)i_red) >> p_vout->i_red_rshift) << p_vout->i_red_lshift) | \
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((((u32)i_green) >> p_vout->i_green_rshift) << p_vout->i_green_lshift) | \
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((((u32)i_blue) >> p_vout->i_blue_rshift) << p_vout->i_blue_lshift))
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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vout_thread_t * vout_CreateThread ( char *psz_display, int i_root_window,
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int i_width, int i_height, int *pi_status, int i_method );
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void vout_DestroyThread ( vout_thread_t *p_vout, int *pi_status );
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picture_t * vout_CreatePicture ( vout_thread_t *p_vout, int i_type,
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int i_width, int i_height );
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void vout_DestroyPicture ( vout_thread_t *p_vout, picture_t *p_pic );
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void vout_DisplayPicture ( vout_thread_t *p_vout, picture_t *p_pic );
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void vout_DatePicture ( vout_thread_t *p_vout, picture_t *p_pic, mtime_t date );
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void vout_LinkPicture ( vout_thread_t *p_vout, picture_t *p_pic );
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void vout_UnlinkPicture ( vout_thread_t *p_vout, picture_t *p_pic );
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subpicture_t * vout_CreateSubPicture ( vout_thread_t *p_vout, int i_type, int i_size );
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void vout_DestroySubPicture ( vout_thread_t *p_vout, subpicture_t *p_subpic );
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void vout_DisplaySubPicture ( vout_thread_t *p_vout, subpicture_t *p_subpic );
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void vout_SetBuffers ( vout_thread_t *p_vout, void *p_buf1, void *p_buf2 );
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