gstreamer/subprojects/gst-plugins-base/gst-libs/gst/gl/gstglbufferpool.c

441 lines
13 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 "gstglbufferpool.h"
#include "gstglmemory.h"
#include "gstglsyncmeta.h"
#include "gstglutils.h"
/**
* SECTION:gstglbufferpool
* @title: GstGLBufferPool
* @short_description: buffer pool for #GstGLBaseMemory objects
* @see_also: #GstBufferPool, #GstGLBaseMemory, #GstGLMemory
*
* a #GstGLBufferPool is an object that allocates buffers with #GstGLBaseMemory
*
* A #GstGLBufferPool is created with gst_gl_buffer_pool_new()
*
* #GstGLBufferPool implements the VideoMeta buffer pool option
* %GST_BUFFER_POOL_OPTION_VIDEO_META, the VideoAligment buffer pool option
* %GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT as well as the OpenGL specific
* %GST_BUFFER_POOL_OPTION_GL_SYNC_META buffer pool option.
*/
/* bufferpool */
struct _GstGLBufferPoolPrivate
{
GstAllocator *allocator;
GstGLVideoAllocationParams *gl_params;
GstCaps *caps;
gboolean add_videometa;
gboolean add_glsyncmeta;
};
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 _init \
GST_DEBUG_CATEGORY_INIT (GST_CAT_GL_BUFFER_POOL, "glbufferpool", 0, \
"GL Buffer Pool");
#define gst_gl_buffer_pool_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLBufferPool, gst_gl_buffer_pool,
GST_TYPE_BUFFER_POOL, G_ADD_PRIVATE (GstGLBufferPool)
_init);
static const gchar **
gst_gl_buffer_pool_get_options (GstBufferPool * pool)
{
static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
GST_BUFFER_POOL_OPTION_GL_SYNC_META,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT,
GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_2D,
GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_RECTANGLE,
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 = NULL;
guint min_buffers, max_buffers;
guint max_align, n;
GstAllocator *allocator = NULL;
GstAllocationParams alloc_params;
GstGLTextureTarget tex_target;
gboolean ret = TRUE;
gint p;
if (!gst_buffer_pool_config_get_params (config, &caps, NULL, &min_buffers,
&max_buffers))
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;
gst_caps_replace (&priv->caps, caps);
if (priv->allocator)
gst_object_unref (priv->allocator);
if (allocator) {
if (!GST_IS_GL_MEMORY_ALLOCATOR (allocator)) {
gst_object_unref (allocator);
goto wrong_allocator;
} else {
priv->allocator = gst_object_ref (allocator);
}
} else {
priv->allocator =
GST_ALLOCATOR (gst_gl_memory_allocator_get_default (glpool->context));
g_assert (priv->allocator);
}
priv->add_videometa = gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
priv->add_glsyncmeta = gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_GL_SYNC_META);
if (priv->gl_params)
gst_gl_allocation_params_free ((GstGLAllocationParams *) priv->gl_params);
priv->gl_params = (GstGLVideoAllocationParams *)
gst_buffer_pool_config_get_gl_allocation_params (config);
if (!priv->gl_params)
priv->gl_params = gst_gl_video_allocation_params_new (glpool->context,
&alloc_params, &info, -1, NULL, 0, 0);
max_align = alloc_params.align;
if (gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT)) {
priv->add_videometa = TRUE;
gst_buffer_pool_config_get_video_alignment (config,
priv->gl_params->valign);
for (n = 0; n < GST_VIDEO_MAX_PLANES; ++n)
max_align |= priv->gl_params->valign->stride_align[n];
for (n = 0; n < GST_VIDEO_MAX_PLANES; ++n)
priv->gl_params->valign->stride_align[n] = max_align;
gst_video_info_align (priv->gl_params->v_info, priv->gl_params->valign);
gst_buffer_pool_config_set_video_alignment (config,
priv->gl_params->valign);
}
if (alloc_params.align < max_align) {
GST_WARNING_OBJECT (pool, "allocation params alignment %u is smaller "
"than the max specified video stride alignment %u, fixing",
(guint) alloc_params.align, max_align);
alloc_params.align = max_align;
gst_buffer_pool_config_set_allocator (config, allocator, &alloc_params);
if (priv->gl_params->parent.alloc_params)
gst_allocation_params_free (priv->gl_params->parent.alloc_params);
priv->gl_params->parent.alloc_params =
gst_allocation_params_copy (&alloc_params);
}
{
GstStructure *s = gst_caps_get_structure (caps, 0);
const gchar *target_str = gst_structure_get_string (s, "texture-target");
gboolean multiple_texture_targets = FALSE;
tex_target = priv->gl_params->target;
if (target_str)
tex_target = gst_gl_texture_target_from_string (target_str);
if (gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_2D)) {
if (tex_target && tex_target != GST_GL_TEXTURE_TARGET_2D)
multiple_texture_targets = TRUE;
tex_target = GST_GL_TEXTURE_TARGET_2D;
}
if (gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_RECTANGLE)) {
if (tex_target && tex_target != GST_GL_TEXTURE_TARGET_RECTANGLE)
multiple_texture_targets = TRUE;
tex_target = GST_GL_TEXTURE_TARGET_RECTANGLE;
}
if (gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_GL_TEXTURE_TARGET_EXTERNAL_OES)) {
if (tex_target && tex_target != GST_GL_TEXTURE_TARGET_EXTERNAL_OES)
multiple_texture_targets = TRUE;
tex_target = GST_GL_TEXTURE_TARGET_EXTERNAL_OES;
}
if (!tex_target)
tex_target = GST_GL_TEXTURE_TARGET_2D;
if (multiple_texture_targets) {
GST_WARNING_OBJECT (pool, "Multiple texture targets configured either "
"through caps or buffer pool options");
ret = FALSE;
}
priv->gl_params->target = tex_target;
}
/* Recalculate the size and offset as we don't add padding between planes. */
priv->gl_params->v_info->size = 0;
for (p = 0; p < GST_VIDEO_INFO_N_PLANES (priv->gl_params->v_info); p++) {
priv->gl_params->v_info->offset[p] = priv->gl_params->v_info->size;
priv->gl_params->v_info->size +=
gst_gl_get_plane_data_size (priv->gl_params->v_info,
priv->gl_params->valign, p);
}
gst_buffer_pool_config_set_params (config, caps,
priv->gl_params->v_info->size, min_buffers, max_buffers);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config) && ret;
/* 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;
}
wrong_allocator:
{
GST_WARNING_OBJECT (pool, "Incorrect allocator type for this pool");
return FALSE;
}
}
static gboolean
gst_gl_buffer_pool_start (GstBufferPool * pool)
{
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)
{
GstGLMemoryAllocator *alloc;
GstGLBufferPool *glpool = GST_GL_BUFFER_POOL_CAST (pool);
GstGLBufferPoolPrivate *priv = glpool->priv;
GstBuffer *buf;
if (!(buf = gst_buffer_new ())) {
goto no_buffer;
}
alloc = GST_GL_MEMORY_ALLOCATOR (priv->allocator);
if (!gst_gl_memory_setup_buffer (alloc, buf, priv->gl_params, NULL, NULL, 0))
goto mem_create_failed;
if (priv->add_glsyncmeta)
gst_buffer_add_gl_sync_meta (glpool->context, 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;
}
}
/**
* gst_gl_buffer_pool_new:
* @context: the #GstGLContext 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);
gst_object_ref_sink (pool);
pool->context = gst_object_ref (context);
GST_LOG_OBJECT (pool, "new GL buffer pool for context %" GST_PTR_FORMAT,
context);
return GST_BUFFER_POOL_CAST (pool);
}
static void
gst_gl_buffer_pool_class_init (GstGLBufferPoolClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
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->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_instance_private (pool);
priv = pool->priv;
priv->allocator = NULL;
priv->caps = NULL;
priv->add_videometa = TRUE;
priv->add_glsyncmeta = FALSE;
}
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 (priv->caps)
gst_caps_unref (priv->caps);
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;
}
if (priv->allocator) {
gst_object_unref (priv->allocator);
priv->allocator = NULL;
}
if (priv->gl_params)
gst_gl_allocation_params_free ((GstGLAllocationParams *) priv->gl_params);
priv->gl_params = NULL;
}
/**
* gst_gl_buffer_pool_get_gl_allocation_params:
* @pool: the #GstGLBufferPool
*
* The returned #GstGLAllocationParams will by %NULL before the first successful
* call to gst_buffer_pool_set_config(). Subsequent successful calls to
* gst_buffer_pool_set_config() will cause this function to return a new
* #GstGLAllocationParams which may or may not contain the same information.
*
* Returns: (transfer full): a copy of the #GstGLAllocationParams being used by the @pool
*
* Since: 1.20
*/
GstGLAllocationParams *
gst_gl_buffer_pool_get_gl_allocation_params (GstGLBufferPool * pool)
{
g_return_val_if_fail (GST_IS_GL_BUFFER_POOL (pool), NULL);
if (pool->priv->gl_params)
return gst_gl_allocation_params_copy ((GstGLAllocationParams *) pool->
priv->gl_params);
else
return NULL;
}
/**
* gst_buffer_pool_config_get_gl_allocation_params:
* @config: a buffer pool config
*
* Returns: (transfer full): the currently set #GstGLAllocationParams or %NULL
*/
GstGLAllocationParams *
gst_buffer_pool_config_get_gl_allocation_params (GstStructure * config)
{
GstGLAllocationParams *ret;
if (!gst_structure_get (config, "gl-allocation-params",
GST_TYPE_GL_ALLOCATION_PARAMS, &ret, NULL))
ret = NULL;
return ret;
}
/**
* gst_buffer_pool_config_set_gl_allocation_params:
* @config: a buffer pool config
* @params: (transfer none): a #GstGLAllocationParams
*
* Sets @params on @config
*/
void
gst_buffer_pool_config_set_gl_allocation_params (GstStructure * config,
const GstGLAllocationParams * params)
{
g_return_if_fail (config != NULL);
g_return_if_fail (params != NULL);
gst_structure_set (config, "gl-allocation-params",
GST_TYPE_GL_ALLOCATION_PARAMS, params, NULL);
}