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172 lines
9.7 KiB
172 lines
9.7 KiB
/*******************************************************************************
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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_tables_t: pre-calculated 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_tables_s
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{
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void * p_base; /* base for all translation tables */
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union
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{
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struct { u16 *p_red, *p_green, *p_blue; } rgb16; /* color 15, 16 bpp */
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struct { u32 *p_red, *p_green, *p_blue; } rgb32; /* color 24, 32 bpp */
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struct { u16 *p_gray; } gray16; /* gray 15, 16 bpp */
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struct { u32 *p_gray; } gray32; /* gray 24, 32 bpp */
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} yuv;
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} vout_tables_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 needs 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_convert_t: 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 (start address in picture)
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* p_y, p_u, p_v Y,U,V samples addresses
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* i_width Y samples width
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* i_height Y samples height
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* i_eol number of Y samples to reach the next line
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* i_pic_eol number or pixels to reach the next line
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* i_scale if non 0, vertical scaling is 1 - 1/i_scale
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* i_matrix_coefficients matrix coefficients
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* Conditions:
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* start x + i_width < picture width
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* start y + i_height * (scaling factor) < picture height
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* i_width % 16 == 0
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*******************************************************************************/
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typedef void (vout_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, int i_eol, int i_pic_eol,
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int i_scale, int i_matrix_coefficients );
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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 following
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* structure.
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*******************************************************************************/
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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 spu_lock; /* subtitle 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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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 (including virtual) */
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int i_screen_depth; /* bits per pixel */
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int i_bytes_per_pixel; /* real screen depth */
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float f_gamma; /* gamma */
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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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#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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/* Running properties */
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u16 i_changes; /* changes made to the thread */
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mtime_t last_picture_date; /* last picture display date */
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mtime_t last_display_date; /* last screen display date */
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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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spu_t p_spu[VOUT_MAX_PICTURES]; /* subtitles */
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vout_tables_t tables; /* translation tables */
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vout_convert_t * p_ConvertYUV420; /* YUV 4:2:0 converter */
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vout_convert_t * p_ConvertYUV422; /* YUV 4:2:2 converter */
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vout_convert_t * p_ConvertYUV444; /* YUV 4:4:4 converter */
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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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} 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_NODISPLAY_CHANGE 0xff00 /* changes which forbidden display */
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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 );
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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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spu_t * vout_CreateSubPictureUnit ( vout_thread_t *p_vout, int i_type, int i_size );
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void vout_DestroySubPictureUnit ( vout_thread_t *p_vout, spu_t *p_spu );
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void vout_DisplaySubPictureUnit ( vout_thread_t *p_vout, spu_t *p_spu );
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void vout_ClearBuffer ( vout_thread_t *p_vout, vout_buffer_t *p_buffer );
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