Edit File: videotoolbox.h
/* * 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); /** * @} */ #endif /* AVCODEC_VIDEOTOOLBOX_H */