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284 lines
8.9 KiB
C
284 lines
8.9 KiB
C
/*
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* gstvaapiimageformat.c - VA image format abstraction
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*
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* gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* SECTION:gstvaapiimageformat
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* @short_description: VA image format abstraction
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*/
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#include "config.h"
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#include <glib.h>
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#include <gst/video/video.h>
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#include "gstvaapiimageformat.h"
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typedef enum _GstVaapiImageFormatType GstVaapiImageFormatType;
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typedef struct _GstVaapiImageFormatMap GstVaapiImageFormatMap;
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enum _GstVaapiImageFormatType {
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GST_VAAPI_IMAGE_FORMAT_TYPE_YCBCR = 1, /* YUV */
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GST_VAAPI_IMAGE_FORMAT_TYPE_RGB, /* RGB */
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GST_VAAPI_IMAGE_FORMAT_TYPE_INDEXED /* paletted */
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};
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struct _GstVaapiImageFormatMap {
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GstVaapiImageFormatType type;
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GstVaapiImageFormat format;
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const char *caps_str;
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VAImageFormat va_format;
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};
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#define DEF(TYPE, FORMAT, CAPS_STR) \
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GST_VAAPI_IMAGE_FORMAT_TYPE_##TYPE, \
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GST_VAAPI_IMAGE_##FORMAT, \
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CAPS_STR
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#define DEF_YUV(FORMAT, FOURCC, ENDIAN, BPP) \
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{ DEF(YCBCR, FORMAT, GST_VIDEO_CAPS_YUV(#FORMAT)), \
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{ VA_FOURCC FOURCC, VA_##ENDIAN##_FIRST, BPP, }, }
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#define DEF_RGB(FORMAT, FOURCC, ENDIAN, BPP, DEPTH, R,G,B,A) \
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{ DEF(RGB, FORMAT, GST_VIDEO_CAPS_##FORMAT), \
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{ VA_FOURCC FOURCC, VA_##ENDIAN##_FIRST, BPP, DEPTH, R,G,B,A }, }
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/* Image formats, listed in HW order preference */
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static const GstVaapiImageFormatMap gst_vaapi_image_formats[] = {
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DEF_YUV(NV12, ('N','V','1','2'), LSB, 12),
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DEF_YUV(YV12, ('Y','V','1','2'), LSB, 12),
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DEF_YUV(I420, ('I','4','2','0'), LSB, 12),
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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DEF_RGB(ARGB, ('A','R','G','B'), MSB, 32,
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32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000),
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DEF_RGB(ABGR, ('A','B','G','R'), MSB, 32,
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32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000),
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#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
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DEF_RGB(BGRA, ('B','G','R','A'), LSB, 32,
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32, 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000),
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DEF_RGB(RGBA, ('R','G','B','A'), LSB, 32,
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32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000),
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#endif
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{ 0, }
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};
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#undef DEF_RGB
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#undef DEF_YUV
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#undef DEF
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static inline gboolean
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match_va_format_rgb(const VAImageFormat *fmt1, const VAImageFormat *fmt2)
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{
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return (fmt1->byte_order == fmt2->byte_order &&
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fmt1->red_mask == fmt2->red_mask &&
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fmt1->green_mask == fmt2->green_mask &&
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fmt1->blue_mask == fmt2->blue_mask &&
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fmt1->alpha_mask == fmt2->alpha_mask);
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}
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static const GstVaapiImageFormatMap *
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get_map(GstVaapiImageFormat format)
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{
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const GstVaapiImageFormatMap *m;
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for (m = gst_vaapi_image_formats; m->format; m++)
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if (m->format == format)
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return m;
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return NULL;
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}
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/**
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* gst_vaapi_image_format_is_rgb:
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* @format: a #GstVaapiImageFormat
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*
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* Checks whether the format is an RGB format.
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*
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* Return value: %TRUE if @format is RGB format
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*/
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gboolean
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gst_vaapi_image_format_is_rgb(GstVaapiImageFormat format)
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{
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const GstVaapiImageFormatMap * const m = get_map(format);
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return m ? (m->type == GST_VAAPI_IMAGE_FORMAT_TYPE_RGB) : FALSE;
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}
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/**
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* gst_vaapi_image_format_is_yuv:
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* @format: a #GstVaapiImageFormat
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*
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* Checks whether the format is an YUV format.
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*
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* Return value: %TRUE if @format is YUV format
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*/
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gboolean
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gst_vaapi_image_format_is_yuv(GstVaapiImageFormat format)
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{
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const GstVaapiImageFormatMap * const m = get_map(format);
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return m ? (m->type == GST_VAAPI_IMAGE_FORMAT_TYPE_YCBCR) : FALSE;
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}
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/**
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* gst_vaapi_image_format:
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* @va_format: a #VAImageFormat
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*
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* Converts a VA image format into the corresponding #GstVaapiImageFormat.
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* If the image format cannot be represented by #GstVaapiImageFormat,
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* then zero is returned.
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*
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* Return value: the #GstVaapiImageFormat describing the @va_format
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*/
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GstVaapiImageFormat
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gst_vaapi_image_format(const VAImageFormat *va_format)
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{
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const GstVaapiImageFormatMap *m;
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for (m = gst_vaapi_image_formats; m->format; m++)
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if (m->va_format.fourcc == va_format->fourcc &&
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(m->type == GST_VAAPI_IMAGE_FORMAT_TYPE_RGB ?
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match_va_format_rgb(&m->va_format, va_format) :
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TRUE))
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return m->format;
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return 0;
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}
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/**
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* gst_vaapi_image_format_from_caps:
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* @caps: a #GstCaps
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*
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* Converts @caps into the corresponding #GstVaapiImageFormat. If the
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* image format cannot be represented by #GstVaapiImageFormat, then
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* zero is returned.
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*
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* Return value: the #GstVaapiImageFormat describing the @caps
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*/
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GstVaapiImageFormat
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gst_vaapi_image_format_from_caps(GstCaps *caps)
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{
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const GstVaapiImageFormatMap *m;
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GstStructure *structure;
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VAImageFormat *va_format, va_formats[2];
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gint endian, rmask, gmask, bmask, amask = 0;
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guint32 fourcc;
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if (!caps)
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return 0;
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structure = gst_caps_get_structure(caps, 0);
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if (!structure)
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return 0;
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/* Check for YUV format */
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if (gst_structure_get_fourcc(structure, "format", &fourcc))
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return gst_vaapi_image_format_from_fourcc(fourcc);
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/* Check for RGB format */
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gst_structure_get_int(structure, "endianness", &endian);
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gst_structure_get_int(structure, "red_mask", &rmask);
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gst_structure_get_int(structure, "green_mask", &gmask);
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gst_structure_get_int(structure, "blue_mask", &bmask);
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gst_structure_get_int(structure, "alpha_mask", &amask);
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va_format = &va_formats[0];
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va_format->byte_order = endian == G_BIG_ENDIAN ? VA_MSB_FIRST : VA_LSB_FIRST;
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va_format->red_mask = rmask;
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va_format->green_mask = gmask;
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va_format->blue_mask = bmask;
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va_format->alpha_mask = amask;
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va_format = &va_formats[1];
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va_format->byte_order = endian == G_BIG_ENDIAN ? VA_LSB_FIRST : VA_MSB_FIRST;
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va_format->red_mask = GUINT32_SWAP_LE_BE(rmask);
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va_format->green_mask = GUINT32_SWAP_LE_BE(gmask);
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va_format->blue_mask = GUINT32_SWAP_LE_BE(bmask);
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va_format->alpha_mask = GUINT32_SWAP_LE_BE(amask);
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for (m = gst_vaapi_image_formats; m->format; m++)
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if (match_va_format_rgb(&m->va_format, &va_formats[0]) ||
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match_va_format_rgb(&m->va_format, &va_formats[1]))
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return m->format;
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return 0;
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}
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/**
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* gst_vaapi_image_format_from_fourcc:
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* @fourcc: a FOURCC value
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*
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* Converts a FOURCC value into the corresponding #GstVaapiImageFormat.
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* If the image format cannot be represented by #GstVaapiImageFormat,
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* then zero is returned.
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*
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* Return value: the #GstVaapiImageFormat describing the FOURCC value
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*/
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GstVaapiImageFormat
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gst_vaapi_image_format_from_fourcc(guint32 fourcc)
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{
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return (GstVaapiImageFormat)fourcc;
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}
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/**
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* gst_vaapi_image_format_get_va_format:
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* @format: a #GstVaapiImageFormat
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*
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* Converts a #GstVaapiImageFormat into the corresponding VA image
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* format. If no matching VA image format was found, %NULL is returned
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* and this error must be reported to be fixed.
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*
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* Return value: the VA image format, or %NULL if none was found
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*/
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const VAImageFormat *
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gst_vaapi_image_format_get_va_format(GstVaapiImageFormat format)
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{
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const GstVaapiImageFormatMap * const m = get_map(format);
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return m ? &m->va_format : NULL;
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}
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/**
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* gst_vaapi_image_format_get_caps:
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* @format: a #GstVaapiImageFormat
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*
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* Converts a #GstVaapiImageFormat into the corresponding #GstCaps. If
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* no matching caps were found, %NULL is returned.
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*
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* Return value: the newly allocated #GstCaps, or %NULL if none was found
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*/
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GstCaps *
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gst_vaapi_image_format_get_caps(GstVaapiImageFormat format)
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{
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const GstVaapiImageFormatMap * const m = get_map(format);
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return m ? gst_caps_from_string(m->caps_str) : NULL;
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}
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/**
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* gst_vaapi_image_format_get_score:
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* @format: a #GstVaapiImageFormat
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*
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* Determines how "native" is this @format. The lower is the returned
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* score, the best format this is for the underlying hardware.
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*
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* Return value: the @format score, or %G_MAXUINT if none was found
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*/
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guint
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gst_vaapi_image_format_get_score(GstVaapiImageFormat format)
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{
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const GstVaapiImageFormatMap * const m = get_map(format);
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return m ? (m - &gst_vaapi_image_formats[0]) : G_MAXUINT;
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}
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