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/*
* VDA HW acceleration
*
* copyright (c) 2011 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_VDA_H
#define AVCODEC_VDA_H
#include <pthread.h>
#include <stdint.h>
// emmintrin.h is unable to compile with -std=c99 -Werror=missing-prototypes
// http://openradar.appspot.com/8026390
#undef __GNUC_STDC_INLINE__
#define Picture QuickdrawPicture
#include <VideoDecodeAcceleration/VDADecoder.h>
#undef Picture
/**
* This structure is used to store a decoded frame information and data.
*/
typedef struct {
/**
* The PTS of the frame.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
int64_t pts;
/**
* The CoreVideo buffer that contains the decoded data.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
CVPixelBufferRef cv_buffer;
/**
* A pointer to the next frame.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
struct vda_frame *next_frame;
} vda_frame;
/**
* This structure is used to provide the necessary configurations and data
* to the VDA FFmpeg HWAccel implementation.
*
* The application must make it available as AVCodecContext.hwaccel_context.
*/
struct vda_context {
/**
* VDA decoder object.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
VDADecoder decoder;
/**
* VDA frames queue ordered by presentation timestamp.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
vda_frame *queue;
/**
* Mutex for locking queue operations.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
pthread_mutex_t queue_mutex;
/**
* The frame width.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
int width;
/**
* The frame height.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
int height;
/**
* The frame format.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
int format;
/**
* The pixel format for output image buffers.
*
* - encoding: unused
* - decoding: Set/Unset by user.
*/
OSType cv_pix_fmt_type;
/**
* The current bitstream buffer.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
uint8_t *bitstream;
/**
* The current size of the bitstream.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
int bitstream_size;
/**
* The reference size used for fast reallocation.
*
* - encoding: unused
* - decoding: Set/Unset by libavcodec.
*/
int ref_size;
};
/** Creates the video decoder. */
int ff_vda_create_decoder(struct vda_context *vda_ctx,
uint8_t *extradata,
int extradata_size);
/** Destroys the video decoder. */
int ff_vda_destroy_decoder(struct vda_context *vda_ctx);
/** Returns the top frame of the queue. */
vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx);
/** Releases the given frame. */
void ff_vda_release_vda_frame(vda_frame *frame);
#endif /* AVCODEC_VDA_H */
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