[517/906] add GstGLBufferPool

which adds GstGLMeta to buffers

gst-libs/gst/gl/Makefile.am

@@ -12,6 +12,7 @@ libgstgl_@GST_API_VERSION@_la_SOURCES = \
 	gstgldisplay.c \
 	gstglmemory.c \
 	gstglmeta.c \
+	gstglbufferpool.c \
 	gstglfilter.c \
 	gstglmixer.c \
         gstglshader.c \
@@ -36,6 +37,7 @@ libgstgl_@GST_API_VERSION@include_HEADERS = \
 	gstgldisplay.h \
 	gstglmemory.h \
 	gstglmeta.h \
+	gstglbufferpool.h \
 	gstgles2.h \
 	gstglfilter.h \
 	gstglmixer.h \

gst-libs/gst/gl/gstglbufferpool.c

@@ -0,0 +1,243 @@
+/*
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstglbufferpool.h"
+
+/* bufferpool */
+struct _GstGLBufferPoolPrivate
+{
+  GstAllocator *allocator;
+  GstAllocationParams params;
+  GstCaps *caps;
+  gint im_format;
+  GstVideoInfo info;
+  guint padded_width;
+  guint padded_height;
+  gboolean add_metavideo;
+  gboolean add_glmeta;
+};
+
+static void gst_gl_buffer_pool_finalize (GObject * object);
+
+#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 (GstGLBufferPool, gst_gl_buffer_pool, GST_TYPE_BUFFER_POOL);
+
+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_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;
+
+  /* enable metadata based on config of the pool */
+  priv->add_metavideo =
+      gst_buffer_pool_config_has_option (config,
+      GST_BUFFER_POOL_OPTION_VIDEO_META);
+
+  /* parse extra alignment info */
+  priv->add_glmeta = gst_buffer_pool_config_has_option (config,
+      GST_BUFFER_POOL_OPTION_GL_META);
+
+  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;
+  GstMemory *gl_mem;
+
+  info = &priv->info;
+
+  if (!(buf = gst_buffer_new ())) {
+    goto no_buffer;
+  }
+
+  if (!(gl_mem =
+          gst_gl_memory_alloc (glpool->display, GST_VIDEO_INFO_FORMAT (info),
+              GST_VIDEO_INFO_WIDTH (info), GST_VIDEO_INFO_HEIGHT (info))))
+    goto mem_create_failed;
+
+  gst_buffer_append_memory (buf, gl_mem);
+
+  if (priv->add_metavideo) {
+    GST_DEBUG_OBJECT (pool, "adding GstVideoMeta");
+    /* these are just the defaults for now */
+    gst_buffer_add_video_meta (buf, 0, GST_VIDEO_INFO_FORMAT (info),
+        GST_VIDEO_INFO_WIDTH (info), GST_VIDEO_INFO_HEIGHT (info));
+  }
+
+  if (priv->add_glmeta) {
+
+    GST_DEBUG_OBJECT (pool, "adding GstGLMeta");
+    /* these are just the defaults for now */
+    gst_buffer_add_gl_meta (buf, glpool->display);
+  }
+
+  *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 create GL Memory");
+    return GST_FLOW_ERROR;
+  }
+}
+
+GstBufferPool *
+gst_gl_buffer_pool_new (GstGLDisplay * display)
+{
+  GstGLBufferPool *pool;
+
+  pool = g_object_new (GST_TYPE_GL_BUFFER_POOL, NULL);
+  pool->display = gst_object_ref (display);
+
+  GST_LOG_OBJECT (pool, "new GL buffer pool %p", pool);
+
+  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;
+
+  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;
+}
+
+static void
+gst_gl_buffer_pool_init (GstGLBufferPool * pool)
+{
+  pool->priv = GST_GL_BUFFER_POOL_GET_PRIVATE (pool);
+}
+
+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);
+}

gst-libs/gst/gl/gstglbufferpool.h

@@ -0,0 +1,71 @@
+/*
+ * GStreamer
+ * Copyright (C) 2012 Matthew Waters <ystreet00@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.
+ */
+
+#ifndef _GST_GL_BUFFER_POOL_H_
+#define _GST_GL_BUFFER_POOL_H_
+
+#include <gst/video/video.h>
+#include <gst/video/gstvideometa.h>
+#include <gst/video/gstvideopool.h>
+
+#include "gstgldisplay.h"
+#include "gstglmeta.h"
+#include "gstglmemory.h"
+
+G_BEGIN_DECLS
+
+/**
+ * GST_BUFFER_POOL_OPTION_VIDEO_META:
+ *
+ * An option that can be activated on bufferpool to request OpenGL metadata
+ * on buffers from the pool.
+ */
+#define GST_BUFFER_POOL_OPTION_GL_META "GstBufferPoolOptionGLMeta"
+
+typedef struct _GstGLBufferPool GstGLBufferPool;
+typedef struct _GstGLBufferPoolClass GstGLBufferPoolClass;
+typedef struct _GstGLBufferPoolPrivate GstGLBufferPoolPrivate;
+
+/* buffer pool functions */
+#define GST_TYPE_GL_BUFFER_POOL      (gst_gl_buffer_pool_get_type())
+#define GST_IS_GL_BUFFER_POOL(obj)   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GL_BUFFER_POOL))
+#define GST_GL_BUFFER_POOL(obj)      (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GL_BUFFER_POOL, GstGLBufferPool))
+#define GST_GL_BUFFER_POOL_CAST(obj) ((GstGLBufferPool*)(obj))
+
+struct _GstGLBufferPool
+{
+  GstBufferPool bufferpool;
+
+  GstGLDisplay *display;
+
+  GstGLBufferPoolPrivate *priv;
+};
+
+struct _GstGLBufferPoolClass
+{
+  GstBufferPoolClass parent_class;
+};
+
+GType gst_gl_buffer_pool_get_type (void);
+GstBufferPool *gst_gl_buffer_pool_new (GstGLDisplay * display);
+
+G_END_DECLS
+
+#endif /* _GST_GL_BUFFER_POOL_H_ */