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  1. /*
  2.  * VDA HW acceleration
  3.  *
  4.  * copyright (c) 2011 Sebastien Zwickert
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #ifndef AVCODEC_VDA_H
  24. #define AVCODEC_VDA_H
  25.  
  26. /**
  27.  * @file
  28.  * @ingroup lavc_codec_hwaccel_vda
  29.  * Public libavcodec VDA header.
  30.  */
  31.  
  32. #include <stdint.h>
  33.  
  34. // emmintrin.h is unable to compile with -std=c99 -Werror=missing-prototypes
  35. // http://openradar.appspot.com/8026390
  36. #undef __GNUC_STDC_INLINE__
  37.  
  38. #define Picture QuickdrawPicture
  39. #include <VideoDecodeAcceleration/VDADecoder.h>
  40. #undef Picture
  41.  
  42. #include "libavcodec/version.h"
  43.  
  44. /**
  45.  * @defgroup lavc_codec_hwaccel_vda VDA
  46.  * @ingroup lavc_codec_hwaccel
  47.  *
  48.  * @{
  49.  */
  50.  
  51. /**
  52.  * This structure is used to provide the necessary configurations and data
  53.  * to the VDA FFmpeg HWAccel implementation.
  54.  *
  55.  * The application must make it available as AVCodecContext.hwaccel_context.
  56.  */
  57. struct vda_context {
  58.     /**
  59.      * VDA decoder object.
  60.      *
  61.      * - encoding: unused
  62.      * - decoding: Set/Unset by libavcodec.
  63.      */
  64.     VDADecoder          decoder;
  65.  
  66.     /**
  67.      * The Core Video pixel buffer that contains the current image data.
  68.      *
  69.      * encoding: unused
  70.      * decoding: Set by libavcodec. Unset by user.
  71.      */
  72.     CVPixelBufferRef    cv_buffer;
  73.  
  74.     /**
  75.      * Use the hardware decoder in synchronous mode.
  76.      *
  77.      * encoding: unused
  78.      * decoding: Set by user.
  79.      */
  80.     int                 use_sync_decoding;
  81.  
  82.     /**
  83.      * The frame width.
  84.      *
  85.      * - encoding: unused
  86.      * - decoding: Set/Unset by user.
  87.      */
  88.     int                 width;
  89.  
  90.     /**
  91.      * The frame height.
  92.      *
  93.      * - encoding: unused
  94.      * - decoding: Set/Unset by user.
  95.      */
  96.     int                 height;
  97.  
  98.     /**
  99.      * The frame format.
  100.      *
  101.      * - encoding: unused
  102.      * - decoding: Set/Unset by user.
  103.      */
  104.     int                 format;
  105.  
  106.     /**
  107.      * The pixel format for output image buffers.
  108.      *
  109.      * - encoding: unused
  110.      * - decoding: Set/Unset by user.
  111.      */
  112.     OSType              cv_pix_fmt_type;
  113.  
  114.     /**
  115.      * The current bitstream buffer.
  116.      *
  117.      * - encoding: unused
  118.      * - decoding: Set/Unset by libavcodec.
  119.      */
  120.     uint8_t             *priv_bitstream;
  121.  
  122.     /**
  123.      * The current size of the bitstream.
  124.      *
  125.      * - encoding: unused
  126.      * - decoding: Set/Unset by libavcodec.
  127.      */
  128.     int                 priv_bitstream_size;
  129.  
  130.     /**
  131.      * The reference size used for fast reallocation.
  132.      *
  133.      * - encoding: unused
  134.      * - decoding: Set/Unset by libavcodec.
  135.      */
  136.     int                 priv_allocated_size;
  137.  
  138.     /**
  139.      * Use av_buffer to manage buffer.
  140.      * When the flag is set, the CVPixelBuffers returned by the decoder will
  141.      * be released automatically, so you have to retain them if necessary.
  142.      * Not setting this flag may cause memory leak.
  143.      *
  144.      * encoding: unused
  145.      * decoding: Set by user.
  146.      */
  147.     int                 use_ref_buffer;
  148. };
  149.  
  150. /** Create the video decoder. */
  151. int ff_vda_create_decoder(struct vda_context *vda_ctx,
  152.                           uint8_t *extradata,
  153.                           int extradata_size);
  154.  
  155. /** Destroy the video decoder. */
  156. int ff_vda_destroy_decoder(struct vda_context *vda_ctx);
  157.  
  158. /**
  159.  * @}
  160.  */
  161.  
  162. #endif /* AVCODEC_VDA_H */
  163.