New file |
| | |
| | | /* |
| | | * 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. 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. |
| | | * 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 */ |