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video: add more info in the format structure

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Add a field to describe how many bits are used to pack items.
Specify the shift for each component.
Add some more flags to better describe the format.
This commit is contained in:
Wim Taymans 2011-07-25 18:08:24 +02:00
parent 4fb67fb0da
commit 68088f7992
2 changed files with 34 additions and 19 deletions
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22
gst-libs/gst/video/video.c
View file

@ -36,17 +36,17 @@ typedef struct
GstVideoFormatInfo info;
} VideoFormat;
/* depths */
#define DPTH0 0, { 0, 0, 0, 0 }
#define DPTH8 1, { 8, 0, 0, 0 }
#define DPTH888 3, { 8, 8, 8, 0 }
#define DPTH8888 4, { 8, 8, 8, 8 }
#define DPTH10_10_10 3, { 10, 10, 10, 0 }
#define DPTH16 1, { 16, 0, 0, 0 }
#define DPTH16_16_16 3, { 16, 16, 16, 0 }
#define DPTH16_16_16_16 4, { 16, 16, 16, 16 }
#define DPTH555 3, { 5, 5, 5, 0 }
#define DPTH565 3, { 5, 6, 5, 0 }
/* depths: bits, n_components, shift, depth */
#define DPTH0 0, 0, { 0, 0, 0, 0 }, { 0, 0, 0, 0 }
#define DPTH8 8, 1, { 0, 0, 0, 0 }, { 8, 0, 0, 0 }
#define DPTH888 8, 3, { 0, 0, 0, 0 }, { 8, 8, 8, 0 }
#define DPTH8888 8, 4, { 0, 0, 0, 0 }, { 8, 8, 8, 8 }
#define DPTH10_10_10 10, 3, { 0, 0, 0, 0 }, { 10, 10, 10, 0 }
#define DPTH16 16, 1, { 0, 0, 0, 0 }, { 16, 0, 0, 0 }
#define DPTH16_16_16 16, 3, { 0, 0, 0, 0 }, { 16, 16, 16, 0 }
#define DPTH16_16_16_16 16, 4, { 0, 0, 0, 0 }, { 16, 16, 16, 16 }
#define DPTH555 16, 3, { 10, 5, 0, 0 }, { 5, 5, 5, 0 }
#define DPTH565 16, 3, { 11, 5, 0, 0 }, { 5, 6, 5, 0 }
/* pixel strides */
#define PSTR0 { 0, 0, 0, 0 }

31
gst-libs/gst/video/video.h
View file

@ -136,15 +136,23 @@ typedef struct _GstVideoFormatInfo GstVideoFormatInfo;
* with index 0.
* @GST_VIDEO_FORMAT_FLAG_ALPHA: The video format has an alpha components with
* the number 3.
* @GST_VIDEO_FORMAT_FLAG_LE: The video format has data stored in little
* endianness.
* @GST_VIDEO_FORMAT_FLAG_PALETTE: The video format has a palette.
* @GST_VIDEO_FORMAT_FLAG_COMPLEX: The video format has a complex layout that
* can't be described with the usual information in the #GstVideoFormatInfo.
*
* The different video flags that a format info can have.
*/
typedef enum
{
GST_VIDEO_FORMAT_FLAG_YUV = (1 << 0),
GST_VIDEO_FORMAT_FLAG_RGB = (1 << 1),
GST_VIDEO_FORMAT_FLAG_GRAY = (1 << 2),
GST_VIDEO_FORMAT_FLAG_ALPHA = (1 << 3)
GST_VIDEO_FORMAT_FLAG_YUV = (1 << 0),
GST_VIDEO_FORMAT_FLAG_RGB = (1 << 1),
GST_VIDEO_FORMAT_FLAG_GRAY = (1 << 2),
GST_VIDEO_FORMAT_FLAG_ALPHA = (1 << 3),
GST_VIDEO_FORMAT_FLAG_LE = (1 << 4),
GST_VIDEO_FORMAT_FLAG_PALETTE = (1 << 5),
GST_VIDEO_FORMAT_FLAG_COMPLEX = (1 << 6)
} GstVideoFormatFlags;
#define GST_VIDEO_COMP_Y 0
@ -162,16 +170,21 @@ typedef enum
* @format: #GstVideoFormat
* @name: string representation of the format
* @flags: #GstVideoFormatFlags
* @bits: The number of bits used to pack data items. This can be 8 when the
* pixels are stored in bytes. for values > 8 multiple bytes should be read
* according to the endianness flag before applying the shift and mask.
* @n_components: the number of components in the video format.
* @depth: the depth for each component
* @shift: the number of bits to shift away to get the component data
* @depth: the depth in bits for each component
* @pixel_stride: the pixel stride of each component. This is the amount of
* bytes to the pixel immediately to the right.
* bytes to the pixel immediately to the right. When bits < 8, the stride is
* expressed in bits.
* @n_planes: the number of planes for this format. The number of planes can be
* less than the amount of components when multiple componets are packed into
* less than the amount of components when multiple components are packed into
* one plane.
* @plane: the plane number where a component can be found
* @offset: the offset in the plane where the first pixel of the components
* can be found.
* can be found. If bits < 8 the amount is specified in bits.
* @w_sub: subsampling factor of the width for the component. Use
* GST_VIDEO_SUB_SCALE to scale a width.
* @h_sub: subsampling factor of the height for the component. Use
@ -183,7 +196,9 @@ struct _GstVideoFormatInfo {
GstVideoFormat format;
const gchar *name;
GstVideoFormatFlags flags;
guint bits;
guint n_components;
guint shift[GST_VIDEO_MAX_COMPONENTS];
guint depth[GST_VIDEO_MAX_COMPONENTS];
gint pixel_stride[GST_VIDEO_MAX_COMPONENTS];
guint n_planes;