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188 lines
11 KiB
188 lines
11 KiB
/*******************************************************************************
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* video.h: common video definitions
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* (c)1999 VideoLAN
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*******************************************************************************
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* This header is required by all modules which have to handle pictures. It
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* includes all common video types and constants.
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*******************************************************************************
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* Requires:
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* "config.h"
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* "common.h"
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* "mtime.h"
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*******************************************************************************/
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/*******************************************************************************
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* pixel_t: universal pixel value descriptor
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*******************************************************************************
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* This type and associated macros and functions are provided as an universal
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* way of storing colors/pixels parameters. For pixels, it represents the
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* actual value of the pixel. For RGB values, it is a 24 bits RGB encoded
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* value. For masks, it is 0 or 1...
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*******************************************************************************/
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typedef u32 pixel_t;
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#define RGBVALUE2RED( value ) ( (value) & 0x0000ff )
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#define RGBVALUE2GREEN( value ) ( ((value) >> 8) & 0x0000ff )
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#define RGBVALUE2BLUE( value ) ( ((value) >> 16) & 0x0000ff )
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/*******************************************************************************
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* picture_t: video picture
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*******************************************************************************
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* Any picture destined to be displayed by a video output thread should be
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* stored in this structure from it's creation to it's effective display.
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* Two forms of pictures exists: independant pictures, which can be manipulated
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* freely, although usage of graphic library is recommanded, and heap pictures.
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* Extreme care should be taken when manipulating heap pictures, since any error
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* could cause a segmentation fault in the video output thread. The rule is:
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* once a picture is in the video heap, only it's data can be written. All other
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* fields should only be read or modified using interface functions.
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* Note that for all pictures, some properties should never be modified, except
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* by the video output thread itself, once the picture has been created !
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*******************************************************************************/
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typedef struct
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{
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/* Type and flags - should NOT be modified except by the vout thread */
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int i_type; /* picture type */
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int i_flags; /* picture flags */
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/* Picture properties - those properties are fixed at initialization and
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* should NOT be modified */
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int i_width; /* picture width */
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int i_height; /* picture height */
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int i_bpp; /* padded bits per pixel */
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int i_bytes_per_line; /* total number of bytes per line */
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/* Picture properties - those properties can be modified is the picture is
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* independant, or in a heap but permanent or reserved */
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int i_x; /* x position offset in output window */
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int i_y; /* y position offset in output window */
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int i_h_align; /* horizontal alignment */
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int i_v_align; /* vertical alignment */
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int i_h_ratio; /* horizontal display ratio */
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int i_v_ratio; /* vertical display ratio */
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int i_level; /* overlay hierarchical level */
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/* Link reference counter - it can be modified using vout_Link and
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* vout_Unlink functions, or directly if the picture is independant */
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int i_refcount; /* link reference counter */
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/* Video properties - those properties should not be modified once
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* the picture is in a heap, but can be freely modified if it is
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* independant */
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int i_stream; /* video stream id */
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mtime_t date; /* display date */
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mtime_t duration; /* duration for overlay pictures */
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/* Picture data - data can always be freely modified, although special care
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* should be taken for permanent pictures to avoid flickering - p_data
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* itself (the pointer) should NEVER be modified */
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pixel_t pixel; /* pixel value, for mask pictures */
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byte_t * p_data; /* picture data */
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} picture_t;
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/* Pictures types */
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#define EMPTY_PICTURE 0 /* picture is waiting to be used */
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#define RGB_BLANK_PICTURE 10 /* blank picture (rgb color, no data) */
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#define PIXEL_BLANK_PICTURE 11 /* blank picture (pixel color, no data) */
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#define RGB_PICTURE 20 /* picture is 24 bits rgb encoded */
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#define PIXEL_PICTURE 30 /* picture is pixel encoded */
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#define RGB_MASK_PICTURE 40 /* picture is a 1 bpp rgb mask */
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#define PIXEL_MASK_PICTURE 41 /* picture is a 1 bpp pixel mask */
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/* ?? */
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#define YUV_444_PICTURE 100 /* chroma 444 YUV picture */
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#define YUV_422_PICTURE 101 /* chroma 422 YUV picture */
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#define YUV_420_PICTURE 102 /* chroma 420 YUV picture */
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/* Pictures properties (flags) */
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#define RESERVED_PICTURE (1 << 0) /* picture is not ready but reserved */
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#define PERMANENT_PICTURE (1 << 1) /* picture is permanent */
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#define DISPLAYED_PICTURE (1 << 2) /* picture has been displayed */
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#define OWNER_PICTURE (1 << 3) /* picture owns its data */
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#define DISPLAY_PICTURE (1 << 4) /* picture will be displayed */
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#define DESTROY_PICTURE (1 << 5) /* picture will be destroyed */
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#define TRANSPARENT_PICTURE (1 << 8) /* picture is transparent */
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#define OVERLAY_PICTURE (1 << 9) /* picture overlays another one */
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/* Alignments - this field describe how the position of the picture will
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* be calculated */
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#define ALIGN_LEFT -1 /* left-aligned */
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#define ALIGN_TOP -1 /* up-aligned */
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#define ALIGN_ENTER 0 /* centered */
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#define ALIGN_RIGHT 1 /* right-aligned */
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#define ALIGN_BOTTOM 1 /* bottom-aligned */
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#define ALIGN_H_DEFAULT ALIGN_LEFT /* default horizontal alignment */
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#define ALIGN_V_DEFAULT ALIGN_TOP /* default vertical alignment */
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/* Display ratios - this field describe how the image will be resized before
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* being displayed */
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#define DISPLAY_RATIO_HALF -1 /* 1:2 half size */
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#define DISPLAY_RATIO_NORMAL 0 /* 1:1 normal size */
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#define DISPLAY_RATIO_DOUBLE 1 /* 2:1 double size */
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/* ?? add other ratios (TRIPLE, THIRD), TV, automatic, ... */
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/*******************************************************************************
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* video_cfg_t: video object configuration structure
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*******************************************************************************
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* This structure is passed as a parameter to many initialization function of
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* the vout and vdec modules. It includes many fields describing potential
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* properties of a new object. The 'i_properties' field allow to set only a
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* subset of the required properties, asking the called function to use default
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* settings for the other ones.
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*******************************************************************************/
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typedef struct video_cfg_s
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{
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u64 i_properties; /* used properties */
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/* Size properties */
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int i_width; /* image or window width */
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int i_height; /* image or window height */
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int i_size; /* heap size */
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/* X11 properties */
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char * psz_display; /* display name */
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char * psz_title; /* window title */
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boolean_t b_shm_ext; /* try to use XShm extension */
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/* Pictures properties */
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int i_type; /* picture type */
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int i_flags; /* picture flags */
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int i_bpp; /* padded bits per pixel */
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int i_x; /* x position offset in output window */
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int i_y; /* y position offset in output window */
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int i_h_align; /* horizontal alignment */
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int i_v_align; /* vertical alignment */
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int i_h_ratio; /* horizontal display ratio */
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int i_v_ratio; /* vertical display ratio */
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int i_level; /* overlay hierarchical level */
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int i_refcount; /* link reference counter */
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int i_stream; /* video stream id */
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mtime_t date; /* picture display date */
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mtime_t duration; /* duration for overlay pictures */
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pixel_t pixel; /* pixel value, for mask pictures */
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byte_t * p_data; /* picture data */
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} video_cfg_t;
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/* Properties flags (see picture_t and other video structures for
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* explanations) */
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#define VIDEO_CFG_WIDTH (1 << 0)
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#define VIDEO_CFG_HEIGHT (1 << 1)
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#define VIDEO_CFG_SIZE (1 << 2)
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#define VIDEO_CFG_DISPLAY (1 << 4)
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#define VIDEO_CFG_TITLE (1 << 5)
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#define VIDEO_CFG_SHM_EXT (1 << 6)
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#define VIDEO_CFG_TYPE (1 << 8)
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#define VIDEO_CFG_FLAGS (1 << 9)
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#define VIDEO_CFG_BPP (1 << 10)
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#define VIDEO_CFG_POSITION (1 << 11) /* both i_x and i_y */
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#define VIDEO_CFG_ALIGN (1 << 12) /* both i_h_align and i_v_align */
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#define VIDEO_CFG_RATIO (1 << 13) /* both i_h_ratio and i_y_ratio */
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#define VIDEO_CFG_LEVEL (1 << 14)
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#define VIDEO_CFG_REFCOUNT (1 << 15)
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#define VIDEO_CFG_STREAM (1 << 16)
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#define VIDEO_CFG_DATE (1 << 17)
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#define VIDEO_CFG_DURATION (1 << 18)
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#define VIDEO_CFG_PIXEL (1 << 19)
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#define VIDEO_CFG_DATA (1 << 20)
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