gstreamer/sys/vdpau/gstvdp/gstvdputils.c
2012-11-04 00:09:59 +00:00

138 lines
3.8 KiB
C

/*
* GStreamer
* Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "gstvdpvideobuffer.h"
#include "gstvdputils.h"
static void
gst_vdp_video_remove_pixel_aspect_ratio (GstStructure * structure)
{
gint par_n, par_d;
if (gst_structure_get_fraction (structure, "pixel-aspect-ratio", &par_n,
&par_d)) {
gint width;
gst_structure_get_int (structure, "width", &width);
width = gst_util_uint64_scale_int (width, par_n, par_d);
gst_structure_set (structure, "width", G_TYPE_INT, width, NULL);
gst_structure_remove_field (structure, "pixel-aspect-ratio");
}
}
GstCaps *
gst_vdp_video_to_output_caps (GstCaps * video_caps)
{
GstCaps *output_caps;
gint i;
g_return_val_if_fail (GST_IS_CAPS (video_caps), NULL);
output_caps = gst_caps_copy (video_caps);
for (i = 0; i < gst_caps_get_size (video_caps); i++) {
GstStructure *structure, *rgb_structure;
structure = gst_caps_get_structure (output_caps, i);
if (!gst_structure_has_name (structure, "video/x-vdpau-video"))
goto not_video_error;
rgb_structure = gst_structure_copy (structure);
gst_structure_set_name (structure, "video/x-vdpau-output");
gst_structure_remove_field (structure, "chroma-type");
gst_vdp_video_remove_pixel_aspect_ratio (structure);
gst_structure_set_name (rgb_structure, "video/x-raw-rgb");
gst_structure_remove_field (rgb_structure, "chroma-type");
gst_vdp_video_remove_pixel_aspect_ratio (rgb_structure);
gst_caps_append_structure (output_caps, rgb_structure);
}
return output_caps;
error:
gst_caps_unref (output_caps);
return NULL;
not_video_error:
GST_WARNING ("The caps weren't of type \"video/x-vdpau-video\"");
goto error;
}
GstCaps *
gst_vdp_yuv_to_video_caps (GstCaps * yuv_caps)
{
GstCaps *video_caps;
gint i;
g_return_val_if_fail (GST_IS_CAPS (yuv_caps), NULL);
video_caps = gst_caps_copy (yuv_caps);
for (i = 0; i < gst_caps_get_size (video_caps); i++) {
GstStructure *structure;
guint32 fourcc;
VdpChromaType chroma_type;
structure = gst_caps_get_structure (video_caps, i);
if (!gst_structure_has_name (structure, "video/x-raw-yuv"))
goto not_yuv_error;
if (!gst_structure_get_fourcc (structure, "format", &fourcc))
goto no_format_error;
chroma_type = -1;
for (i = 0; i < G_N_ELEMENTS (formats); i++) {
if (formats[i].fourcc == fourcc) {
chroma_type = formats[i].chroma_type;
break;
}
}
if (chroma_type == -1)
goto no_chroma_error;
/* now we transform the caps */
gst_structure_set_name (structure, "video/x-vdpau-video");
gst_structure_remove_field (structure, "format");
gst_structure_set (structure, "chroma-type", G_TYPE_INT, chroma_type, NULL);
}
return video_caps;
error:
gst_caps_unref (video_caps);
return NULL;
not_yuv_error:
GST_WARNING ("The caps weren't of type \"video/x-raw-yuv\"");
goto error;
no_format_error:
GST_WARNING ("The caps didn't have a \"fourcc\" field");
goto error;
no_chroma_error:
GST_WARNING ("The caps had an invalid \"fourcc\" field");
goto error;
}