| /* GStreamer Apple Core Video memory |
| * Copyright (C) 2015 Ilya Konstantinov |
| * |
| * 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_APPLE_CORE_VIDEO_MEMORY_H__ |
| #define __GST_APPLE_CORE_VIDEO_MEMORY_H__ |
| |
| #include <gst/gst.h> |
| |
| #include "CoreVideo/CoreVideo.h" |
| |
| G_BEGIN_DECLS |
| |
| /** |
| * GstAppleCoreVideoLockState: |
| * |
| * Specifies whether the backing CVPixelBuffer is locked for read-only |
| * or read-write. |
| * |
| * Locking for reading only improves performance by preventing |
| * Core Video from invalidating existing caches of the buffer’s contents. |
| */ |
| typedef enum |
| { |
| GST_APPLE_CORE_VIDEO_MEMORY_UNLOCKED, |
| GST_APPLE_CORE_VIDEO_MEMORY_LOCKED_READONLY, |
| GST_APPLE_CORE_VIDEO_MEMORY_LOCKED_READ_WRITE |
| } GstAppleCoreVideoLockState; |
| |
| /** |
| * GstAppleCoreVideoPixelBuffer: |
| * |
| * This structure wraps CVPixelBuffer, managing its lock states and reference count. |
| * It will be referenced by one or more #GstAppleCoreVideoMemory. |
| */ |
| typedef struct |
| { |
| guint refcount; |
| GMutex mutex; |
| CVPixelBufferRef buf; |
| /* Allows mem_map to refuse Read-Write locking a buffer that was previously |
| * locked for Read-Only. */ |
| GstAppleCoreVideoLockState lock_state; |
| /* Counts the number of times the buffer was locked. |
| * Only the first lock affects whether it's just for reading |
| * or for reading and writing, as reflected in @lock_state. */ |
| guint lock_count; |
| } GstAppleCoreVideoPixelBuffer; |
| |
| /** |
| * GST_APPLE_CORE_VIDEO_NO_PLANE: |
| * |
| * Indicates a non-planar pixel buffer. |
| */ |
| #define GST_APPLE_CORE_VIDEO_NO_PLANE ((size_t)-1) |
| |
| /** |
| * GstAppleCoreVideoMemory: |
| * |
| * Represents a video plane or an entire (non-planar) video image, |
| * backed by a CVPixelBuffer. |
| * |
| * This structure shares a #GstAppleCoreVideoPixelBuffer instance |
| * with other instances. |
| */ |
| typedef struct |
| { |
| GstMemory mem; |
| |
| GstAppleCoreVideoPixelBuffer *gpixbuf; |
| size_t plane; |
| } GstAppleCoreVideoMemory; |
| |
| void |
| gst_apple_core_video_memory_init (void); |
| |
| GstAppleCoreVideoPixelBuffer * |
| gst_apple_core_video_pixel_buffer_new (CVPixelBufferRef pixbuf); |
| |
| GstAppleCoreVideoPixelBuffer * |
| gst_apple_core_video_pixel_buffer_ref (GstAppleCoreVideoPixelBuffer * shared); |
| |
| void |
| gst_apple_core_video_pixel_buffer_unref (GstAppleCoreVideoPixelBuffer * shared); |
| |
| gboolean |
| gst_is_apple_core_video_memory (GstMemory * mem); |
| |
| GstMemory * |
| gst_apple_core_video_memory_new_wrapped (GstAppleCoreVideoPixelBuffer * shared, gsize plane, gsize size); |
| |
| G_END_DECLS |
| |
| #endif /* __GST_APPLE_CORE_VIDEO_MEMORY_H__ */ |