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/* GStreamer
* Copyright (C) 2023 Seungha Yang <seungha@centricular.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstdwritebitmappool.h"
GST_DEBUG_CATEGORY_STATIC (dwrite_bitmap_pool_debug);
#define GST_CAT_DEFAULT dwrite_bitmap_pool_debug
struct _GstDWriteBitmapPool
{
GstBufferPool parent;
GstDWriteBitmapAllocator *alloc;
GstVideoInfo info;
};
#define gst_dwrite_bitmap_pool_parent_class parent_class
G_DEFINE_TYPE (GstDWriteBitmapPool,
gst_dwrite_bitmap_pool, GST_TYPE_BUFFER_POOL);
static void gst_dwrite_bitmap_pool_finalize (GObject * object);
static const gchar **gst_dwrite_bitmap_pool_get_options (GstBufferPool * pool);
static gboolean gst_dwrite_bitmap_pool_set_config (GstBufferPool * pool,
GstStructure * config);
static GstFlowReturn gst_dwrite_bitmap_pool_alloc_buffer (GstBufferPool *
pool, GstBuffer ** buffer, GstBufferPoolAcquireParams * params);
static void
gst_dwrite_bitmap_pool_class_init (GstDWriteBitmapPoolClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstBufferPoolClass *pool_class = GST_BUFFER_POOL_CLASS (klass);
object_class->finalize = gst_dwrite_bitmap_pool_finalize;
pool_class->get_options =
GST_DEBUG_FUNCPTR (gst_dwrite_bitmap_pool_get_options);
pool_class->set_config =
GST_DEBUG_FUNCPTR (gst_dwrite_bitmap_pool_set_config);
pool_class->alloc_buffer =
GST_DEBUG_FUNCPTR (gst_dwrite_bitmap_pool_alloc_buffer);
GST_DEBUG_CATEGORY_INIT (dwrite_bitmap_pool_debug,
"dwritebitmappool", 0, "dwritebitmappool");
}
static void
gst_dwrite_bitmap_pool_init (GstDWriteBitmapPool * self)
{
}
static void
gst_dwrite_bitmap_pool_finalize (GObject * object)
{
GstDWriteBitmapPool *self = GST_DWRITE_BITMAP_POOL (object);
gst_clear_object (&self->alloc);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static const gchar **
gst_dwrite_bitmap_pool_get_options (GstBufferPool * pool)
{
static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
nullptr
};
return options;
}
static gboolean
gst_dwrite_bitmap_pool_set_config (GstBufferPool * pool, GstStructure * config)
{
GstDWriteBitmapPool *self = GST_DWRITE_BITMAP_POOL (pool);
GstCaps *caps;
guint size, min_buffers, max_buffers;
GstDWriteBitmapMemory *dmem;
GstMemory *mem;
if (!gst_buffer_pool_config_get_params (config,
&caps, &size, &min_buffers, &max_buffers)) {
GST_WARNING_OBJECT (self, "Invalid config");
return FALSE;
}
if (!caps) {
GST_WARNING_OBJECT (self, "No caps");
return FALSE;
}
if (!gst_video_info_from_caps (&self->info, caps)) {
GST_WARNING_OBJECT (self, "Invalid caps");
return FALSE;
}
if (GST_VIDEO_INFO_FORMAT (&self->info) != GST_VIDEO_FORMAT_BGRA) {
GST_WARNING_OBJECT (self, "Unsupported format");
return FALSE;
}
if (!self->alloc)
self->alloc = gst_dwrite_bitmap_allocator_new ();
if (!self->alloc) {
GST_WARNING_OBJECT (self, "Couldn't create allocator");
return FALSE;
}
mem = gst_dwrite_bitmap_allocator_alloc (self->alloc,
self->info.width, self->info.height);
if (!mem) {
GST_WARNING_OBJECT (self, "Couldn't allocate memory");
return FALSE;
}
dmem = (GstDWriteBitmapMemory *) mem;
size = dmem->info.size;
gst_memory_unref (mem);
gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
max_buffers);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config);
}
static GstFlowReturn
gst_dwrite_bitmap_pool_alloc_buffer (GstBufferPool * pool,
GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
{
GstDWriteBitmapPool *self = GST_DWRITE_BITMAP_POOL (pool);
GstBuffer *buf;
GstMemory *mem;
GstDWriteBitmapMemory *dmem;
*buffer = nullptr;
if (!self->alloc) {
GST_ERROR_OBJECT (self, "Allocator was not configured");
return GST_FLOW_ERROR;
}
mem = gst_dwrite_bitmap_allocator_alloc (self->alloc,
self->info.width, self->info.height);
if (!mem) {
GST_ERROR_OBJECT (self, "Couldn't allocate memory");
return GST_FLOW_ERROR;
}
buf = gst_buffer_new ();
gst_buffer_append_memory (buf, mem);
dmem = (GstDWriteBitmapMemory *) mem;
gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_INFO_FORMAT (&dmem->info), GST_VIDEO_INFO_WIDTH (&dmem->info),
GST_VIDEO_INFO_HEIGHT (&dmem->info),
GST_VIDEO_INFO_N_PLANES (&dmem->info), dmem->info.offset,
dmem->info.stride);
*buffer = buf;
return GST_FLOW_OK;
}
GstBufferPool *
gst_dwrite_bitmap_pool_new (void)
{
GstBufferPool *pool = (GstBufferPool *)
g_object_new (GST_TYPE_DWRITE_BITMAP_POOL, nullptr);
gst_object_ref_sink (pool);
return pool;
}
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