lavfi: use a video frame pool for each link of the filtergraph

1 files changed, 84 insertions, 0 deletions

diff --git a/libavfilter/framepool.h b/libavfilter/framepool.h
new file mode 100644
index 0000000000..bb6bb10f27
--- /dev/null
+++ b/libavfilter/framepool.h
@@ -0,0 +1,84 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * Copyright (c) 2015 Matthieu Bouron <matthieu.bouron stupeflix.com>
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_FRAME_POOL_H
+#define AVUTIL_FRAME_POOL_H
+
+#include "libavutil/buffer.h"
+#include "libavutil/frame.h"
+
+/**
+ * Video frame pool. This structure is opaque and not meant to be accessed
+ * directly. It is allocated with ff_video_frame_pool_init() and freed with
+ * ff_video_frame_pool_uninit().
+ */
+typedef struct FFVideoFramePool FFVideoFramePool;
+
+/**
+ * Allocate and initialize a video frame pool.
+ *
+ * @param alloc a function that will be used to allocate new frame buffers when
+ * the pool is empty. May be NULL, then the default allocator will be used
+ * (av_buffer_alloc()).
+ * @param width width of each frame in this pool
+ * @param height height of each frame in this pool
+ * @param format format of each frame in this pool
+ * @param align buffers alignement of each frame in this pool
+ * @return newly created video frame pool on success, NULL on error.
+ */
+FFVideoFramePool *ff_video_frame_pool_init(AVBufferRef* (*alloc)(int size),
+                                           int width,
+                                           int height,
+                                           enum AVPixelFormat format,
+                                           int align);
+
+/**
+ * Deallocate the video frame pool. It is safe to call this function while
+ * some of the allocated video frame are still in use.
+ *
+ * @param pool pointer to the video frame pool to be freed. It will be set to NULL.
+ */
+void ff_video_frame_pool_uninit(FFVideoFramePool **pool);
+
+/**
+ * Get the video frame pool configuration.
+ *
+ * @param width width of each frame in this pool
+ * @param height height of each frame in this pool
+ * @param format format of each frame in this pool
+ * @param align buffers alignement of each frame in this pool
+ * @return 0 on success, a negative AVERROR otherwise.
+ */
+int ff_video_frame_pool_get_config(FFVideoFramePool *pool,
+                                   int *width,
+                                   int *height,
+                                   enum AVPixelFormat *format,
+                                   int *align);
+
+/**
+ * Allocate a new AVFrame, reussing old buffers from the pool when available.
+ * This function may be called simultaneously from multiple threads.
+ *
+ * @return a new AVFrame on success, NULL on error.
+ */
+AVFrame *ff_video_frame_pool_get(FFVideoFramePool *pool);
+
+
+#endif /* AVUTIL_FRAME_POOL_H */