mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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301 lines
7.9 KiB
C++
301 lines
7.9 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 "gstdwritebitmapmemory.h"
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#include <mutex>
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#include <condition_variable>
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#include <thread>
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#include <wrl.h>
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/* *INDENT-OFF* */
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using namespace Microsoft::WRL;
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/* *INDENT-ON* */
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GST_DEBUG_CATEGORY_STATIC (gst_dwrite_bitmap_allocator_debug);
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#define GST_CAT_DEFAULT gst_dwrite_bitmap_allocator_debug
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#define GST_DWRITE_BITMAP_MEMORY_NAME "DWriteBitmapMemory"
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struct GstDWriteBitmapAllocatorPrivate
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{
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GstDWriteBitmapAllocatorPrivate ()
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{
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com_thread = std::thread (&GstDWriteBitmapAllocatorPrivate::ComThreadFunc,
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this);
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std::unique_lock < std::mutex > lk (init_lock);
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while (!running)
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init_cond.wait (lk);
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}
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~GstDWriteBitmapAllocatorPrivate ()
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{
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thread_lock.lock ();
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terminate = true;
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thread_cond.notify_one ();
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thread_lock.unlock ();
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com_thread.join ();
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}
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void ComThreadFunc ()
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{
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HRESULT hr;
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CoInitializeEx (nullptr, COINIT_MULTITHREADED);
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hr = CoCreateInstance (CLSID_WICImagingFactory, nullptr,
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CLSCTX_INPROC_SERVER, IID_PPV_ARGS (&factory));
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if (FAILED (hr))
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GST_ERROR ("Couldn't create image factory");
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init_lock.lock ();
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running = true;
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init_cond.notify_one ();
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init_lock.unlock ();
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std::unique_lock < std::mutex > lk (thread_lock);
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while (!terminate)
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thread_cond.wait (lk);
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if (factory)
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factory->Release ();
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CoUninitialize ();
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}
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IWICImagingFactory *factory = nullptr;
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std::mutex init_lock;
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std::condition_variable init_cond;
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std::mutex thread_lock;
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std::condition_variable thread_cond;
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bool running = false;
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bool terminate = false;
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std::thread com_thread;
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};
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struct _GstDWriteBitmapAllocator
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{
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GstAllocator parent;
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GstDWriteBitmapAllocatorPrivate *priv;
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};
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static void gst_dwrite_bitmap_allocator_finalize (GObject * object);
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static GstMemory *gst_dwrite_bitmap_allocator_dummy_alloc (GstAllocator * alloc,
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gsize size, GstAllocationParams * params);
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static void gst_dwrite_bitmap_allocator_free (GstAllocator * alloc,
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GstMemory * mem);
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static gpointer gst_dwrite_bitmap_allocator_map (GstMemory * mem,
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GstMapInfo * info, gsize maxsize);
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static void gst_dwrite_bitmap_allocator_unmap (GstMemory * mem,
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GstMapInfo * info);
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static GstMemory *gst_dwrite_bitmap_allocator_share (GstMemory * mem,
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gssize offset, gssize size);
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#define gst_dwrite_bitmap_allocator_parent_class parent_class
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G_DEFINE_TYPE (GstDWriteBitmapAllocator, gst_dwrite_bitmap_allocator,
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GST_TYPE_ALLOCATOR);
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static void
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gst_dwrite_bitmap_allocator_class_init (GstDWriteBitmapAllocatorClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstAllocatorClass *alloc_class = GST_ALLOCATOR_CLASS (klass);
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object_class->finalize = gst_dwrite_bitmap_allocator_finalize;
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alloc_class->alloc = gst_dwrite_bitmap_allocator_dummy_alloc;
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alloc_class->free = gst_dwrite_bitmap_allocator_free;
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GST_DEBUG_CATEGORY_INIT (gst_dwrite_bitmap_allocator_debug,
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"dwritebitmapallocator", 0, "dwritebitmapallocator");
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}
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static void
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gst_dwrite_bitmap_allocator_init (GstDWriteBitmapAllocator * self)
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{
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GstAllocator *alloc = GST_ALLOCATOR_CAST (self);
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alloc->mem_type = GST_DWRITE_BITMAP_MEMORY_NAME;
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alloc->mem_map_full = gst_dwrite_bitmap_allocator_map;
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alloc->mem_unmap_full = gst_dwrite_bitmap_allocator_unmap;
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alloc->mem_share = gst_dwrite_bitmap_allocator_share;
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GST_OBJECT_FLAG_SET (alloc, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
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self->priv = new GstDWriteBitmapAllocatorPrivate ();
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}
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static void
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gst_dwrite_bitmap_allocator_finalize (GObject * object)
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{
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GstDWriteBitmapAllocator *self = GST_DWRITE_BITMAP_ALLOCATOR (object);
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delete self->priv;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GstMemory *
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gst_dwrite_bitmap_allocator_dummy_alloc (GstAllocator * alloc, gsize size,
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GstAllocationParams * params)
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{
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g_assert_not_reached ();
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return nullptr;
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}
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static void
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gst_dwrite_bitmap_allocator_free (GstAllocator * alloc, GstMemory * mem)
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{
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GstDWriteBitmapMemory *dmem = (GstDWriteBitmapMemory *) mem;
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if (dmem->bitmap)
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dmem->bitmap->Release ();
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g_free (dmem);
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}
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static GstMemory *
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gst_dwrite_bitmap_allocator_share (GstMemory * mem, gssize offset, gssize size)
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{
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return nullptr;
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}
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static gpointer
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gst_dwrite_bitmap_allocator_map (GstMemory * mem, GstMapInfo * info,
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gsize maxsize)
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{
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GstDWriteBitmapMemory *dmem = (GstDWriteBitmapMemory *) mem;
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ComPtr < IWICBitmapLock > bitmap_lock;
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HRESULT hr;
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WICRect rect = { 0, 0, dmem->info.width, dmem->info.height };
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DWORD map_flags = 0;
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BYTE *ptr = nullptr;
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UINT size;
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info->user_data[0] = nullptr;
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if ((info->flags & GST_MAP_READ) == GST_MAP_READ)
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map_flags |= (gint) WICBitmapLockRead;
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if ((info->flags & GST_MAP_WRITE) == GST_MAP_WRITE)
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map_flags |= (gint) WICBitmapLockWrite;
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hr = dmem->bitmap->Lock (&rect, map_flags, &bitmap_lock);
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if (FAILED (hr)) {
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GST_ERROR_OBJECT (mem->allocator,
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"Couldn't map bitmap, hr: 0x%x", (guint) hr);
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return nullptr;
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}
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hr = bitmap_lock->GetDataPointer (&size, &ptr);
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if (FAILED (hr)) {
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GST_ERROR_OBJECT (mem->allocator, "Couldn't get data pointer, hr: 0x%x",
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(guint) hr);
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return nullptr;
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}
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info->user_data[0] = (gpointer) bitmap_lock.Detach ();
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return (gpointer) ptr;
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}
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static void
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gst_dwrite_bitmap_allocator_unmap (GstMemory * mem, GstMapInfo * info)
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{
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IWICBitmapLock *bitmap_lock;
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bitmap_lock = (IWICBitmapLock *) info->user_data[0];
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if (!bitmap_lock) {
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GST_WARNING_OBJECT (mem->allocator, "No attached bitmap lock");
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return;
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}
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bitmap_lock->Release ();
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info->user_data[0] = nullptr;
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}
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GstDWriteBitmapAllocator *
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gst_dwrite_bitmap_allocator_new (void)
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{
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GstDWriteBitmapAllocator *self = (GstDWriteBitmapAllocator *)
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g_object_new (GST_TYPE_DWRITE_BITMAP_ALLOCATOR, nullptr);
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gst_object_ref_sink (self);
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if (!self->priv->factory) {
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gst_object_unref (self);
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return nullptr;
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}
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return self;
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}
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GstMemory *
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gst_dwrite_bitmap_allocator_alloc (GstDWriteBitmapAllocator * alloc,
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guint width, guint height)
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{
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HRESULT hr;
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IWICImagingFactory *factory = alloc->priv->factory;
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ComPtr < IWICBitmap > bitmap;
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ComPtr < IWICBitmapLock > bitmap_lock;
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WICRect rect = { 0, 0, (INT) width, (INT) height };
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guint stride = width * 4;
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GstDWriteBitmapMemory *mem;
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gsize size;
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hr = factory->CreateBitmap (width, height, GUID_WICPixelFormat32bppPBGRA,
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WICBitmapCacheOnDemand, &bitmap);
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if (FAILED (hr)) {
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GST_ERROR_OBJECT (alloc, "Couldn't create bitmap, hr: 0x%x", (guint) hr);
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return nullptr;
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}
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hr = bitmap->Lock (&rect, WICBitmapLockRead, &bitmap_lock);
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if (FAILED (hr)) {
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GST_ERROR_OBJECT (alloc, "Couldn't lock bitmap, hr: 0x%x", (guint) hr);
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return nullptr;
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}
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bitmap_lock = nullptr;
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size = stride * height;
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mem = g_new0 (GstDWriteBitmapMemory, 1);
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gst_memory_init (GST_MEMORY_CAST (mem), (GstMemoryFlags) 0,
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GST_ALLOCATOR_CAST (alloc), nullptr, size, 0, 0, size);
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gst_video_info_set_format (&mem->info, GST_VIDEO_FORMAT_BGRA, width, height);
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mem->info.size = size;
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mem->info.stride[0] = stride;
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mem->bitmap = bitmap.Detach ();
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return GST_MEMORY_CAST (mem);
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}
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