0,0 → 1,126 |
/* |
* 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. |
*/ |
|
#include <stdint.h> |
|
#define Picture QuickdrawPicture |
#include <VideoToolbox/VideoToolbox.h> |
#undef Picture |
|
#include "libavcodec/avcodec.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. |
* Created and freed the caller. |
*/ |
VTDecompressionSessionRef session; |
|
/** |
* The output callback that must be passed to the session. |
* Set by av_videottoolbox_default_init() |
*/ |
VTDecompressionOutputCallback output_callback; |
|
/** |
* CVPixelBuffer Format Type that Videotoolbox will use for decoded frames. |
* set by the caller. |
*/ |
OSType cv_pix_fmt_type; |
|
/** |
* CoreMedia Format Description that Videotoolbox will use to create the decompression session. |
* Set by the caller. |
*/ |
CMVideoFormatDescriptionRef cm_fmt_desc; |
|
/** |
* CoreMedia codec type that Videotoolbox will use to create the decompression session. |
* Set by the caller. |
*/ |
int cm_codec_type; |
} AVVideotoolboxContext; |
|
/** |
* 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 |
*/ |
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 |
*/ |
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 |
*/ |
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 |
*/ |
void av_videotoolbox_default_free(AVCodecContext *avctx); |
|
/** |
* @} |
*/ |
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#endif /* AVCODEC_VIDEOTOOLBOX_H */ |