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surface: add helper function to get chroma type from GstVideoFormat.

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Add gst_video_format_get_chroma_type() helper function to determine
the GstVaapiChromaType from a standard GStreamer video format. It is
possible to reconstruct that from GstVideoFormatInfo but it is much
simpler (and faster?) to use the local GstVideoFormatMap table.
This commit is contained in:
Gwenole Beauchesne 2013-07-10 09:48:40 +02:00
parent d633e0d072
commit e3da054e48
3 changed files with 35 additions and 8 deletions
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1
docs/reference/libs/libs-sections.txt
View file

@ -4,6 +4,7 @@
gst_video_format_from_caps
gst_video_format_from_structure
gst_video_format_from_va_format
gst_video_format_get_chroma_type
gst_video_format_get_score
gst_video_format_is_rgb
gst_video_format_is_yuv

39
gst-libs/gst/vaapi/video-format.c
View file

@ -28,11 +28,13 @@
#include "sysdeps.h"
#include <gst/video/video.h>
#include "gstvaapicompat.h"
#include "gstvaapisurface.h"
#include "video-format.h"
typedef struct _GstVideoFormatMap GstVideoFormatMap;
struct _GstVideoFormatMap {
GstVideoFormat format;
GstVaapiChromaType chroma_type;
const char *caps_str;
VAImageFormat va_format;
};
@ -49,23 +51,26 @@ struct _GstVideoFormatMap {
GST_VIDEO_CAPS_##FORMAT
#endif
#define DEF_YUV(FORMAT, FOURCC, ENDIAN, BPP) \
#define DEF_YUV(FORMAT, FOURCC, ENDIAN, BPP, SUB) \
{ G_PASTE(GST_VIDEO_FORMAT_,FORMAT), \
G_PASTE(GST_VAAPI_CHROMA_TYPE_YUV,SUB), \
GST_VIDEO_CAPS_MAKE_YUV(FORMAT), \
{ VA_FOURCC FOURCC, VA_##ENDIAN##_FIRST, BPP, }, }
#define DEF_RGB(FORMAT, FOURCC, ENDIAN, BPP, DEPTH, R,G,B,A) \
{ G_PASTE(GST_VIDEO_FORMAT_,FORMAT), \
G_PASTE(GST_VAAPI_CHROMA_TYPE_RGB,BPP), \
GST_VIDEO_CAPS_MAKE_RGB(FORMAT), \
{ VA_FOURCC FOURCC, VA_##ENDIAN##_FIRST, BPP, DEPTH, R,G,B,A }, }
/* Image formats, listed in HW order preference */
static const GstVideoFormatMap gst_video_formats[] = {
DEF_YUV(NV12, ('N','V','1','2'), LSB, 12),
DEF_YUV(YV12, ('Y','V','1','2'), LSB, 12),
DEF_YUV(I420, ('I','4','2','0'), LSB, 12),
DEF_YUV(YUY2, ('Y','U','Y','2'), LSB, 16),
DEF_YUV(UYVY, ('U','Y','V','Y'), LSB, 16),
DEF_YUV(AYUV, ('A','Y','U','V'), LSB, 32),
DEF_YUV(NV12, ('N','V','1','2'), LSB, 12, 420),
DEF_YUV(YV12, ('Y','V','1','2'), LSB, 12, 420),
DEF_YUV(I420, ('I','4','2','0'), LSB, 12, 420),
DEF_YUV(YUY2, ('Y','U','Y','2'), LSB, 16, 422),
DEF_YUV(UYVY, ('U','Y','V','Y'), LSB, 16, 422),
DEF_YUV(AYUV, ('A','Y','U','V'), LSB, 32, 444),
#if G_BYTE_ORDER == G_BIG_ENDIAN
DEF_RGB(ARGB, ('A','R','G','B'), MSB, 32,
32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000),
@ -85,7 +90,7 @@ static const GstVideoFormatMap gst_video_formats[] = {
DEF_RGB(RGBx, ('R','G','B','X'), LSB, 32,
24, 0x000000ff, 0x0000ff00, 0x00ff0000, 0x00000000),
#endif
DEF_YUV(GRAY8, ('Y','8','0','0'), LSB, 8),
DEF_YUV(GRAY8, ('Y','8','0','0'), LSB, 8, 400),
{ 0, }
};
@ -310,6 +315,24 @@ gst_video_format_to_va_format(GstVideoFormat format)
return m ? &m->va_format : NULL;
}
/**
* gst_video_format_get_chroma_type:
* @format: a #GstVideoFormat
*
* Converts a #GstVideoFormat into the corresponding #GstVaapiChromaType
* format.
*
* Return value: the #GstVaapiChromaType format, or zero if no match
* was found.
*/
guint
gst_video_format_get_chroma_type(GstVideoFormat format)
{
const GstVideoFormatMap * const m = get_map(format);
return m ? m->chroma_type : 0;
}
/**
* gst_video_format_get_score:
* @format: a #GstVideoFormat

3
gst-libs/gst/vaapi/video-format.h
View file

@ -49,6 +49,9 @@ gst_video_format_from_va_format(const VAImageFormat *va_format);
const VAImageFormat *
gst_video_format_to_va_format(GstVideoFormat format);
guint
gst_video_format_get_chroma_type(GstVideoFormat format);
guint
gst_video_format_get_score(GstVideoFormat format);