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/*
* 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;
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;
gboolean reset = TRUE;
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)
reset = !gst_caps_is_equal (priv->caps, caps);
gst_caps_replace (&priv->caps, 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 (reset) {
if (glpool->upload)
gst_object_unref (glpool->upload);
glpool->upload = gst_gl_upload_new (glpool->context);
}
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;
}
}
static gboolean
gst_gl_buffer_pool_start (GstBufferPool * pool)
{
GstGLBufferPool *glpool = GST_GL_BUFFER_POOL_CAST (pool);
GstGLBufferPoolPrivate *priv = glpool->priv;
gst_gl_upload_set_format (glpool->upload, &priv->info);
return GST_BUFFER_POOL_CLASS (parent_class)->start (pool);
}
/* 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->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;
gstbufferpool_class->start = gst_gl_buffer_pool_start;
}
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 (pool->upload)
gst_object_unref (pool->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;
}
}