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+/*
+ * Videotoolbox hardware acceleration
+ *
+ * copyright (c) 2012 Sebastien Zwickert
+ *
+ * This file is part of FFmpeg.
+ *
+ * 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 AVCODEC_VIDEOTOOLBOX_H
+#define AVCODEC_VIDEOTOOLBOX_H
+
+/**
+ * @file
+ * @ingroup lavc_codec_hwaccel_videotoolbox
+ * Public libavcodec Videotoolbox header.
+ */
+
+/**
+ * @defgroup lavc_codec_hwaccel_videotoolbox VideoToolbox Decoder
+ * @ingroup lavc_codec_hwaccel
+ *
+ * Hardware accelerated decoding using VideoToolbox on Apple Platforms
+ *
+ * @{
+ */
+
+#include <stdint.h>
+
+#define Picture QuickdrawPicture
+#include <VideoToolbox/VideoToolbox.h>
+#undef Picture
+
+#include "libavcodec/avcodec.h"
+
+#include "libavutil/attributes.h"
+
+/**
+ * This struct holds all the information that needs to be passed
+ * between the caller and libavcodec for initializing Videotoolbox decoding.
+ * Its size is not a part of the public ABI, it must be allocated with
+ * av_videotoolbox_alloc_context() and freed with av_free().
+ */
+typedef struct AVVideotoolboxContext {
+ /**
+ * Videotoolbox decompression session object.
+ */
+ VTDecompressionSessionRef session;
+
+#if FF_API_VT_OUTPUT_CALLBACK
+ /**
+ * The output callback that must be passed to the session.
+ * Set by av_videottoolbox_default_init()
+ */
+ attribute_deprecated
+ VTDecompressionOutputCallback output_callback;
+#endif
+
+ /**
+ * CVPixelBuffer Format Type that Videotoolbox will use for decoded frames.
+ * set by the caller. If this is set to 0, then no specific format is
+ * requested from the decoder, and its native format is output.
+ */
+ OSType cv_pix_fmt_type;
+
+ /**
+ * CoreMedia Format Description that Videotoolbox will use to create the decompression session.
+ */
+ CMVideoFormatDescriptionRef cm_fmt_desc;
+
+ /**
+ * CoreMedia codec type that Videotoolbox will use to create the decompression session.
+ */
+ int cm_codec_type;
+} AVVideotoolboxContext;
+
+#if FF_API_VT_HWACCEL_CONTEXT
+
+/**
+ * Allocate and initialize a Videotoolbox context.
+ *
+ * This function should be called from the get_format() callback when the caller
+ * selects the AV_PIX_FMT_VIDETOOLBOX format. The caller must then create
+ * the decoder object (using the output callback provided by libavcodec) that
+ * will be used for Videotoolbox-accelerated decoding.
+ *
+ * When decoding with Videotoolbox is finished, the caller must destroy the decoder
+ * object and free the Videotoolbox context using av_free().
+ *
+ * @return the newly allocated context or NULL on failure
+ * @deprecated Use AVCodecContext.hw_frames_ctx or hw_device_ctx instead.
+ */
+attribute_deprecated
+AVVideotoolboxContext *av_videotoolbox_alloc_context(void);
+
+/**
+ * This is a convenience function that creates and sets up the Videotoolbox context using
+ * an internal implementation.
+ *
+ * @param avctx the corresponding codec context
+ *
+ * @return >= 0 on success, a negative AVERROR code on failure
+ * @deprecated Use AVCodecContext.hw_frames_ctx or hw_device_ctx instead.
+ */
+attribute_deprecated
+int av_videotoolbox_default_init(AVCodecContext *avctx);
+
+/**
+ * This is a convenience function that creates and sets up the Videotoolbox context using
+ * an internal implementation.
+ *
+ * @param avctx the corresponding codec context
+ * @param vtctx the Videotoolbox context to use
+ *
+ * @return >= 0 on success, a negative AVERROR code on failure
+ * @deprecated Use AVCodecContext.hw_frames_ctx or hw_device_ctx instead.
+ */
+attribute_deprecated
+int av_videotoolbox_default_init2(AVCodecContext *avctx, AVVideotoolboxContext *vtctx);
+
+/**
+ * This function must be called to free the Videotoolbox context initialized with
+ * av_videotoolbox_default_init().
+ *
+ * @param avctx the corresponding codec context
+ * @deprecated Use AVCodecContext.hw_frames_ctx or hw_device_ctx instead.
+ */
+attribute_deprecated
+void av_videotoolbox_default_free(AVCodecContext *avctx);
+
+#endif /* FF_API_VT_HWACCEL_CONTEXT */
+
+/**
+ * @}
+ */
+
+#endif /* AVCODEC_VIDEOTOOLBOX_H */