mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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252 lines
6.8 KiB
C
252 lines
6.8 KiB
C
/*
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* GStreamer
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* Copyright (C) 2012 Matthew Waters <>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstglbufferpool.h"
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/**
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* SECTION:gstglbufferpool
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* @short_description: buffer pool for #GstGLMemory objects
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* @see_also: #GstBufferPool, #GstGLMemory
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*
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* a #GstGLBufferPool is an object that allocates buffers with #GstGLMemory
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*
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* A #GstGLBufferPool is created with gst_gl_buffer_pool_new()
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*
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* #GstGLBufferPool implements the VideoMeta buffer pool option
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* #GST_BUFFER_POOL_OPTION_VIDEO_META
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*/
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/* bufferpool */
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struct _GstGLBufferPoolPrivate
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{
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GstAllocator *allocator;
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GstAllocationParams params;
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GstCaps *caps;
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gint im_format;
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GstVideoInfo info;
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guint padded_width;
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guint padded_height;
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gboolean add_videometa;
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};
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static void gst_gl_buffer_pool_finalize (GObject * object);
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_GL_BUFFER_POOL);
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#define GST_CAT_DEFAULT GST_CAT_GL_BUFFER_POOL
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#define GST_GL_BUFFER_POOL_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_GL_BUFFER_POOL, GstGLBufferPoolPrivate))
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#define gst_gl_buffer_pool_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstGLBufferPool, gst_gl_buffer_pool,
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GST_TYPE_BUFFER_POOL, GST_DEBUG_CATEGORY_INIT (GST_CAT_GL_BUFFER_POOL,
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"glbufferpool", 0, "GL Buffer Pool"));
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static const gchar **
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gst_gl_buffer_pool_get_options (GstBufferPool * pool)
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{
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static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META, NULL
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};
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return options;
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}
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static gboolean
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gst_gl_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
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{
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GstGLBufferPool *glpool = GST_GL_BUFFER_POOL_CAST (pool);
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GstGLBufferPoolPrivate *priv = glpool->priv;
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GstVideoInfo info;
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GstCaps *caps;
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GstAllocator *allocator;
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GstAllocationParams alloc_params;
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if (!gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL))
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goto wrong_config;
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if (caps == NULL)
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goto no_caps;
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/* now parse the caps from the config */
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if (!gst_video_info_from_caps (&info, caps))
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goto wrong_caps;
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GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, info.width, info.height,
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caps);
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if (!gst_buffer_pool_config_get_allocator (config, &allocator, &alloc_params))
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goto wrong_config;
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if (!allocator) {
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gst_gl_memory_init ();
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allocator = gst_allocator_find (GST_GL_MEMORY_ALLOCATOR);
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}
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priv->allocator = allocator;
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priv->params = alloc_params;
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priv->im_format = GST_VIDEO_INFO_FORMAT (&info);
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if (priv->im_format == -1)
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goto unknown_format;
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if (priv->caps)
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gst_caps_unref (priv->caps);
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priv->caps = gst_caps_ref (caps);
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priv->info = info;
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priv->add_videometa = gst_buffer_pool_config_has_option (config,
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GST_BUFFER_POOL_OPTION_VIDEO_META);
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return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config);
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/* ERRORS */
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wrong_config:
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{
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GST_WARNING_OBJECT (pool, "invalid config");
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return FALSE;
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}
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no_caps:
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{
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GST_WARNING_OBJECT (pool, "no caps in config");
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return FALSE;
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}
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wrong_caps:
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{
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GST_WARNING_OBJECT (pool,
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"failed getting geometry from caps %" GST_PTR_FORMAT, caps);
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return FALSE;
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}
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unknown_format:
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{
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GST_WARNING_OBJECT (glpool, "failed to get format from caps %"
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GST_PTR_FORMAT, caps);
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GST_ELEMENT_ERROR (glpool, RESOURCE, WRITE,
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("Failed to create output image buffer of %dx%d pixels",
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priv->info.width, priv->info.height),
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("Invalid input caps %" GST_PTR_FORMAT, caps));
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return FALSE;;
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}
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}
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/* This function handles GstBuffer creation */
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static GstFlowReturn
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gst_gl_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
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GstBufferPoolAcquireParams * params)
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{
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GstGLBufferPool *glpool = GST_GL_BUFFER_POOL_CAST (pool);
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GstGLBufferPoolPrivate *priv = glpool->priv;
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GstVideoInfo *info;
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GstBuffer *buf;
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GstMemory *gl_mem;
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info = &priv->info;
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if (!(buf = gst_buffer_new ())) {
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goto no_buffer;
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}
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if (!(gl_mem =
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gst_gl_memory_alloc (glpool->display, GST_VIDEO_INFO_FORMAT (info),
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GST_VIDEO_INFO_WIDTH (info), GST_VIDEO_INFO_HEIGHT (info))))
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goto mem_create_failed;
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gst_buffer_append_memory (buf, gl_mem);
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if (priv->add_videometa) {
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GST_DEBUG_OBJECT (pool, "adding GstVideoMeta");
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/* these are just the defaults for now */
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gst_buffer_add_video_meta (buf, 0,
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GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),
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GST_VIDEO_INFO_HEIGHT (info));
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}
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*buffer = buf;
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return GST_FLOW_OK;
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/* ERROR */
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no_buffer:
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{
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GST_WARNING_OBJECT (pool, "can't create image");
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return GST_FLOW_ERROR;
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}
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mem_create_failed:
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{
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GST_WARNING_OBJECT (pool, "Could not create GL Memory");
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return GST_FLOW_ERROR;
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}
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}
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/**
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* gst_gl_buffer_pool_new:
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* @display: the #GstGLDisplay to use
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*
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* Returns: a #GstBufferPool that allocates buffers with #GstGLMemory
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*/
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GstBufferPool *
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gst_gl_buffer_pool_new (GstGLDisplay * display)
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{
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GstGLBufferPool *pool;
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pool = g_object_new (GST_TYPE_GL_BUFFER_POOL, NULL);
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pool->display = gst_object_ref (display);
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GST_LOG_OBJECT (pool, "new GL buffer pool %p", pool);
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return GST_BUFFER_POOL_CAST (pool);
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}
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static void
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gst_gl_buffer_pool_class_init (GstGLBufferPoolClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
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g_type_class_add_private (klass, sizeof (GstGLBufferPoolPrivate));
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gobject_class->finalize = gst_gl_buffer_pool_finalize;
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gstbufferpool_class->get_options = gst_gl_buffer_pool_get_options;
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gstbufferpool_class->set_config = gst_gl_buffer_pool_set_config;
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gstbufferpool_class->alloc_buffer = gst_gl_buffer_pool_alloc;
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}
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static void
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gst_gl_buffer_pool_init (GstGLBufferPool * pool)
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{
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pool->priv = GST_GL_BUFFER_POOL_GET_PRIVATE (pool);
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}
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static void
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gst_gl_buffer_pool_finalize (GObject * object)
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{
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GstGLBufferPool *pool = GST_GL_BUFFER_POOL_CAST (object);
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GstGLBufferPoolPrivate *priv = pool->priv;
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GST_LOG_OBJECT (pool, "finalize GL buffer pool %p", pool);
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if (priv->caps)
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gst_caps_unref (priv->caps);
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G_OBJECT_CLASS (gst_gl_buffer_pool_parent_class)->finalize (object);
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}
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