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