gstreamer/gst-libs/gst/gl/gstglbufferpool.c
Matthew Waters 30c6efc432 gl/mem: allocate the memory per plane
This patch provides the basic infrastructure required for this.
Upload and Download has been ported to this.

Has the nice effect of allowing GstGLMemory to be our
refcounted texture object for any texture type (not just RGBA).

Should not lose any features/video formats.
2017-12-09 19:31:36 +00:00

358 lines
9.4 KiB
C

/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gl.h"
#include "gstglbufferpool.h"
#if GST_GL_HAVE_PLATFORM_EGL
#include <gst/gl/egl/gsteglimagememory.h>
#endif
/**
* SECTION:gstglbufferpool
* @short_description: buffer pool for #GstGLMemory objects
* @see_also: #GstBufferPool, #GstGLMemory
*
* a #GstGLBufferPool is an object that allocates buffers with #GstGLMemory
*
* A #GstGLBufferPool is created with gst_gl_buffer_pool_new()
*
* #GstGLBufferPool implements the VideoMeta buffer pool option
* #GST_BUFFER_POOL_OPTION_VIDEO_META
*/
/* bufferpool */
struct _GstGLBufferPoolPrivate
{
GstAllocator *allocator;
GstAllocationParams params;
GstCaps *caps;
gint im_format;
GstVideoInfo info;
GstGLUpload *upload;
gboolean add_videometa;
#if GST_GL_HAVE_PLATFORM_EGL
gboolean want_eglimage;
GstBuffer *last_buffer;
#endif
};
static void gst_gl_buffer_pool_finalize (GObject * object);
GST_DEBUG_CATEGORY_STATIC (GST_CAT_GL_BUFFER_POOL);
#define GST_CAT_DEFAULT GST_CAT_GL_BUFFER_POOL
#define GST_GL_BUFFER_POOL_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_GL_BUFFER_POOL, GstGLBufferPoolPrivate))
#define gst_gl_buffer_pool_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLBufferPool, gst_gl_buffer_pool,
GST_TYPE_BUFFER_POOL, GST_DEBUG_CATEGORY_INIT (GST_CAT_GL_BUFFER_POOL,
"glbufferpool", 0, "GL Buffer Pool"));
static const gchar **
gst_gl_buffer_pool_get_options (GstBufferPool * pool)
{
static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META, NULL
};
return options;
}
static gboolean
gst_gl_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
{
GstGLBufferPool *glpool = GST_GL_BUFFER_POOL_CAST (pool);
GstGLBufferPoolPrivate *priv = glpool->priv;
GstVideoInfo info;
GstCaps *caps;
GstAllocator *allocator;
GstAllocationParams alloc_params;
if (!gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL))
goto wrong_config;
if (caps == NULL)
goto no_caps;
/* now parse the caps from the config */
if (!gst_video_info_from_caps (&info, caps))
goto wrong_caps;
GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, info.width, info.height,
caps);
if (!gst_buffer_pool_config_get_allocator (config, &allocator, &alloc_params))
goto wrong_config;
if (!allocator) {
gst_gl_memory_init ();
allocator = gst_allocator_find (GST_GL_MEMORY_ALLOCATOR);
}
priv->allocator = allocator;
priv->params = alloc_params;
priv->im_format = GST_VIDEO_INFO_FORMAT (&info);
if (priv->im_format == -1)
goto unknown_format;
if (priv->caps)
gst_caps_unref (priv->caps);
priv->caps = gst_caps_ref (caps);
priv->info = info;
priv->add_videometa = gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
#if GST_GL_HAVE_PLATFORM_EGL
priv->want_eglimage = (priv->allocator
&& g_strcmp0 (priv->allocator->mem_type, GST_EGL_IMAGE_MEMORY_TYPE) == 0);
#endif
if (priv->upload)
gst_object_unref (priv->upload);
priv->upload = gst_gl_upload_new (glpool->context);
gst_gl_upload_init_format (priv->upload, &priv->info);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config);
/* ERRORS */
wrong_config:
{
GST_WARNING_OBJECT (pool, "invalid config");
return FALSE;
}
no_caps:
{
GST_WARNING_OBJECT (pool, "no caps in config");
return FALSE;
}
wrong_caps:
{
GST_WARNING_OBJECT (pool,
"failed getting geometry from caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
unknown_format:
{
GST_WARNING_OBJECT (glpool, "failed to get format from caps %"
GST_PTR_FORMAT, caps);
GST_ELEMENT_ERROR (glpool, RESOURCE, WRITE,
("Failed to create output image buffer of %dx%d pixels",
priv->info.width, priv->info.height),
("Invalid input caps %" GST_PTR_FORMAT, caps));
return FALSE;;
}
}
/* This function handles GstBuffer creation */
static GstFlowReturn
gst_gl_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolAcquireParams * params)
{
GstGLBufferPool *glpool = GST_GL_BUFFER_POOL_CAST (pool);
GstGLBufferPoolPrivate *priv = glpool->priv;
GstVideoInfo *info;
GstBuffer *buf;
info = &priv->info;
if (!(buf = gst_buffer_new ())) {
goto no_buffer;
}
#if GST_GL_HAVE_PLATFORM_EGL
if (priv->want_eglimage) {
/* alloc and append memories, also add video_meta and
* texture_upload_meta */
if (!gst_egl_image_memory_setup_buffer (glpool->context, info, buf))
goto egl_image_mem_create_failed;
*buffer = buf;
return GST_FLOW_OK;
}
#endif
if (!gst_gl_memory_setup_buffer (glpool->context, info, buf))
goto mem_create_failed;
gst_gl_upload_add_video_gl_texture_upload_meta (glpool->priv->upload, buf);
*buffer = buf;
return GST_FLOW_OK;
/* ERROR */
no_buffer:
{
GST_WARNING_OBJECT (pool, "can't create image");
return GST_FLOW_ERROR;
}
mem_create_failed:
{
GST_WARNING_OBJECT (pool, "Could not create GL Memory");
return GST_FLOW_ERROR;
}
#if GST_GL_HAVE_PLATFORM_EGL
egl_image_mem_create_failed:
{
GST_WARNING_OBJECT (pool, "Could not create EGLImage Memory");
return GST_FLOW_ERROR;
}
#endif
}
static GstFlowReturn
gst_gl_buffer_pool_acquire_buffer (GstBufferPool * bpool,
GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
{
GstFlowReturn ret = GST_FLOW_OK;
#if GST_GL_HAVE_PLATFORM_EGL
GstGLBufferPool *glpool = NULL;
#endif
ret =
GST_BUFFER_POOL_CLASS
(gst_gl_buffer_pool_parent_class)->acquire_buffer (bpool, buffer, params);
if (ret != GST_FLOW_OK || !*buffer)
return ret;
#if GST_GL_HAVE_PLATFORM_EGL
glpool = GST_GL_BUFFER_POOL (bpool);
/* XXX: Don't return the memory we just rendered, glEGLImageTargetTexture2DOES()
* keeps the EGLImage unmappable until the next one is uploaded
*/
if (glpool->priv->want_eglimage && *buffer
&& *buffer == glpool->priv->last_buffer) {
GstBuffer *oldbuf = *buffer;
ret =
GST_BUFFER_POOL_CLASS
(gst_gl_buffer_pool_parent_class)->acquire_buffer (bpool,
buffer, params);
gst_object_replace ((GstObject **) & oldbuf->pool, (GstObject *) glpool);
gst_buffer_unref (oldbuf);
}
#endif
return ret;
}
/**
* gst_gl_buffer_pool_new:
* @display: the #GstGLDisplay to use
*
* Returns: a #GstBufferPool that allocates buffers with #GstGLMemory
*/
GstBufferPool *
gst_gl_buffer_pool_new (GstGLContext * context)
{
GstGLBufferPool *pool;
pool = g_object_new (GST_TYPE_GL_BUFFER_POOL, NULL);
pool->context = gst_object_ref (context);
GST_LOG_OBJECT (pool, "new GL buffer pool %p", pool);
return GST_BUFFER_POOL_CAST (pool);
}
#if GST_GL_HAVE_PLATFORM_EGL
void
gst_gl_buffer_pool_replace_last_buffer (GstGLBufferPool * pool,
GstBuffer * buffer)
{
g_return_if_fail (pool != NULL);
g_return_if_fail (buffer != NULL);
gst_buffer_replace (&pool->priv->last_buffer, buffer);
}
#endif
static void
gst_gl_buffer_pool_class_init (GstGLBufferPoolClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
g_type_class_add_private (klass, sizeof (GstGLBufferPoolPrivate));
gobject_class->finalize = gst_gl_buffer_pool_finalize;
gstbufferpool_class->get_options = gst_gl_buffer_pool_get_options;
gstbufferpool_class->set_config = gst_gl_buffer_pool_set_config;
gstbufferpool_class->alloc_buffer = gst_gl_buffer_pool_alloc;
gstbufferpool_class->acquire_buffer = gst_gl_buffer_pool_acquire_buffer;
}
static void
gst_gl_buffer_pool_init (GstGLBufferPool * pool)
{
GstGLBufferPoolPrivate *priv = NULL;
pool->priv = GST_GL_BUFFER_POOL_GET_PRIVATE (pool);
priv = pool->priv;
priv->allocator = NULL;
priv->caps = NULL;
priv->im_format = GST_VIDEO_FORMAT_UNKNOWN;
priv->add_videometa = TRUE;
#if GST_GL_HAVE_PLATFORM_EGL
priv->want_eglimage = FALSE;
priv->last_buffer = FALSE;
#endif
gst_video_info_init (&priv->info);
gst_allocation_params_init (&priv->params);
}
static void
gst_gl_buffer_pool_finalize (GObject * object)
{
GstGLBufferPool *pool = GST_GL_BUFFER_POOL_CAST (object);
GstGLBufferPoolPrivate *priv = pool->priv;
GST_LOG_OBJECT (pool, "finalize GL buffer pool %p", pool);
#if GST_GL_HAVE_PLATFORM_EGL
gst_buffer_replace (&pool->priv->last_buffer, NULL);
#endif
if (priv->caps)
gst_caps_unref (priv->caps);
if (priv->upload)
gst_object_unref (priv->upload);
G_OBJECT_CLASS (gst_gl_buffer_pool_parent_class)->finalize (object);
/* only release the context once all our memory have been deleted */
if (pool->context) {
gst_object_unref (pool->context);
pool->context = NULL;
}
}