gstreamer/gst/gl/gstgldownload.c

316 lines
9.3 KiB
C

/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstgldownload.h"
#define GST_CAT_DEFAULT gst_gl_download_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static const GstElementDetails element_details =
GST_ELEMENT_DETAILS ("OpenGL video maker",
"Filter/Effect",
"A from GL to video flow filter",
"Julien Isorce <julien.isorce@gmail.com>");
static GstStaticPadTemplate gst_gl_download_src_pad_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB ";"
GST_VIDEO_CAPS_RGBx ";"
GST_VIDEO_CAPS_BGRx ";"
GST_VIDEO_CAPS_xBGR ";"
GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, AYUV }"))
);
static GstStaticPadTemplate gst_gl_download_sink_pad_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_GL_VIDEO_CAPS)
);
enum
{
PROP_0
};
#define DEBUG_INIT(bla) \
GST_DEBUG_CATEGORY_INIT (gst_gl_download_debug, "gldownload", 0, "gldownload element");
GST_BOILERPLATE_FULL (GstGLDownload, gst_gl_download, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM, DEBUG_INIT);
static void gst_gl_download_set_property (GObject* object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_gl_download_get_property (GObject* object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_gl_download_reset (GstGLDownload* download);
static gboolean gst_gl_download_set_caps (GstBaseTransform* bt,
GstCaps* incaps, GstCaps* outcaps);
static GstCaps* gst_gl_download_transform_caps (GstBaseTransform* bt,
GstPadDirection direction, GstCaps* caps);
static gboolean gst_gl_download_start (GstBaseTransform* bt);
static gboolean gst_gl_download_stop (GstBaseTransform* bt);
static GstFlowReturn gst_gl_download_transform (GstBaseTransform* trans,
GstBuffer* inbuf, GstBuffer* outbuf);
static gboolean gst_gl_download_get_unit_size (GstBaseTransform* trans, GstCaps* caps,
guint* size);
static void
gst_gl_download_base_init (gpointer klass)
{
GstElementClass* element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details (element_class, &element_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_gl_download_src_pad_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_gl_download_sink_pad_template));
}
static void
gst_gl_download_class_init (GstGLDownloadClass* klass)
{
GObjectClass* gobject_class;
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_gl_download_set_property;
gobject_class->get_property = gst_gl_download_get_property;
GST_BASE_TRANSFORM_CLASS (klass)->transform_caps =
gst_gl_download_transform_caps;
GST_BASE_TRANSFORM_CLASS (klass)->transform = gst_gl_download_transform;
GST_BASE_TRANSFORM_CLASS (klass)->start = gst_gl_download_start;
GST_BASE_TRANSFORM_CLASS (klass)->stop = gst_gl_download_stop;
GST_BASE_TRANSFORM_CLASS (klass)->set_caps = gst_gl_download_set_caps;
GST_BASE_TRANSFORM_CLASS (klass)->get_unit_size =
gst_gl_download_get_unit_size;
}
static void
gst_gl_download_init (GstGLDownload* download, GstGLDownloadClass* klass)
{
gst_gl_download_reset (download);
}
static void
gst_gl_download_set_property (GObject* object, guint prop_id,
const GValue* value, GParamSpec* pspec)
{
//GstGLDownload *download = GST_GL_DOWNLOAD (object);
switch (prop_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_download_get_property (GObject* object, guint prop_id,
GValue* value, GParamSpec* pspec)
{
//GstGLDownload *download = GST_GL_DOWNLOAD (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_gl_download_reset (GstGLDownload* download)
{
if (download->display)
{
g_object_unref (download->display);
download->display = NULL;
}
}
static gboolean
gst_gl_download_start (GstBaseTransform* bt)
{
//GstGLDownload* download = GST_GL_DOWNLOAD (bt);
return TRUE;
}
static gboolean
gst_gl_download_stop (GstBaseTransform* bt)
{
GstGLDownload* download = GST_GL_DOWNLOAD (bt);
gst_gl_download_reset (download);
return TRUE;
}
static GstCaps*
gst_gl_download_transform_caps (GstBaseTransform * bt,
GstPadDirection direction, GstCaps* caps)
{
GstGLDownload* download;
GstStructure* structure;
GstCaps *newcaps, *newothercaps;
GstStructure* newstruct;
const GValue* width_value;
const GValue* height_value;
const GValue* framerate_value;
const GValue* par_value;
download = GST_GL_DOWNLOAD (bt);
GST_ERROR ("transform caps %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
width_value = gst_structure_get_value (structure, "width");
height_value = gst_structure_get_value (structure, "height");
framerate_value = gst_structure_get_value (structure, "framerate");
par_value = gst_structure_get_value (structure, "pixel-aspect-ratio");
if (direction == GST_PAD_SINK)
{
newothercaps = gst_caps_new_simple ("video/x-raw-rgb", NULL);
newstruct = gst_caps_get_structure (newothercaps, 0);
gst_structure_set_value (newstruct, "width", width_value);
gst_structure_set_value (newstruct, "height", height_value);
gst_structure_set_value (newstruct, "framerate", framerate_value);
if (par_value)
gst_structure_set_value (newstruct, "pixel-aspect-ratio", par_value);
else
gst_structure_set (newstruct, "pixel-aspect-ratio", GST_TYPE_FRACTION,
1, 1, NULL);
newcaps = gst_caps_new_simple ("video/x-raw-yuv", NULL);
gst_caps_append(newcaps, newothercaps);
}
else newcaps = gst_caps_new_simple ("video/x-raw-gl", NULL);
newstruct = gst_caps_get_structure (newcaps, 0);
gst_structure_set_value (newstruct, "width", width_value);
gst_structure_set_value (newstruct, "height", height_value);
gst_structure_set_value (newstruct, "framerate", framerate_value);
if (par_value)
gst_structure_set_value (newstruct, "pixel-aspect-ratio", par_value);
else
gst_structure_set (newstruct, "pixel-aspect-ratio", GST_TYPE_FRACTION,
1, 1, NULL);
GST_ERROR ("new caps %" GST_PTR_FORMAT, newcaps);
return newcaps;
}
static gboolean
gst_gl_download_set_caps (GstBaseTransform* bt, GstCaps* incaps,
GstCaps* outcaps)
{
GstGLDownload* download;
gboolean ret;
download = GST_GL_DOWNLOAD (bt);
GST_DEBUG ("called with %" GST_PTR_FORMAT, incaps);
ret = gst_video_format_parse_caps (outcaps, &download->video_format,
&download->width, &download->height);
if (!ret)
{
GST_ERROR ("bad caps");
return FALSE;
}
return ret;
}
static gboolean
gst_gl_download_get_unit_size (GstBaseTransform* trans, GstCaps* caps,
guint* size)
{
gboolean ret;
GstStructure *structure;
gint width;
gint height;
structure = gst_caps_get_structure (caps, 0);
if (gst_structure_has_name (structure, "video/x-raw-gl"))
{
ret = gst_gl_buffer_parse_caps (caps, &width, &height);
if (ret)
*size = gst_gl_buffer_get_size (width, height);
}
else
{
GstVideoFormat video_format;
ret = gst_video_format_parse_caps (caps, &video_format, &width, &height);
if (ret)
*size = gst_video_format_get_size (video_format, width, height);
}
return ret;
}
static GstFlowReturn
gst_gl_download_transform (GstBaseTransform* trans, GstBuffer* inbuf,
GstBuffer* outbuf)
{
GstGLDownload* download = GST_GL_DOWNLOAD (trans);
GstGLBuffer* gl_inbuf = GST_GL_BUFFER (inbuf);
if (download->display == NULL)
{
download->display = g_object_ref (gl_inbuf->display);
//blocking call, init color space conversion if needed
gst_gl_display_init_download (download->display, download->video_format,
download->width, download->height);
}
else
g_assert (download->display == gl_inbuf->display);
GST_DEBUG ("making video %p size %d",
GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
//blocking call
if (gst_gl_display_do_download(download->display, gl_inbuf->texture,
gl_inbuf->width, gl_inbuf->height, GST_BUFFER_DATA (outbuf)))
return GST_FLOW_OK;
else
return GST_FLOW_UNEXPECTED;
}