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  1. /*
  2.  * Video Acceleration API (video decoding)
  3.  * HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1
  4.  *
  5.  * Copyright (C) 2008-2009 Splitted-Desktop Systems
  6.  *
  7.  * This file is part of FFmpeg.
  8.  *
  9.  * FFmpeg is free software; you can redistribute it and/or
  10.  * modify it under the terms of the GNU Lesser General Public
  11.  * License as published by the Free Software Foundation; either
  12.  * version 2.1 of the License, or (at your option) any later version.
  13.  *
  14.  * FFmpeg is distributed in the hope that it will be useful,
  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17.  * Lesser General Public License for more details.
  18.  *
  19.  * You should have received a copy of the GNU Lesser General Public
  20.  * License along with FFmpeg; if not, write to the Free Software
  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22.  */
  23.  
  24. #ifndef AVCODEC_VAAPI_INTERNAL_H
  25. #define AVCODEC_VAAPI_INTERNAL_H
  26.  
  27. #include <va/va.h>
  28. #include "vaapi.h"
  29. #include "avcodec.h"
  30. #include "mpegvideo.h"
  31.  
  32. /**
  33.  * @addtogroup VAAPI_Decoding
  34.  *
  35.  * @{
  36.  */
  37.  
  38. typedef struct {
  39.     VADisplay display;                  ///< Windowing system dependent handle
  40.     VAConfigID config_id;               ///< Configuration ID
  41.     VAContextID context_id;             ///< Context ID (video decode pipeline)
  42.     VABufferID pic_param_buf_id;        ///< Picture parameter buffer
  43.     VABufferID iq_matrix_buf_id;        ///< Inverse quantiser matrix buffer
  44.     VABufferID bitplane_buf_id;         ///< Bitplane buffer (for VC-1 decoding)
  45.     VABufferID *slice_buf_ids;          ///< Slice parameter/data buffers
  46.     unsigned int n_slice_buf_ids;       ///< Number of effective slice buffers
  47.     unsigned int slice_buf_ids_alloc;   ///< Number of allocated slice buffers
  48.     void *slice_params;                 ///< Pointer to slice parameter buffers
  49.     unsigned int slice_param_size;      ///< Size of a slice parameter element
  50.     unsigned int slice_params_alloc;    ///< Number of allocated slice parameters
  51.     unsigned int slice_count;           ///< Number of slices currently filled in
  52.     const uint8_t *slice_data;          ///< Pointer to slice data buffer base
  53.     unsigned int slice_data_size;       ///< Current size of slice data
  54. } FFVAContext;
  55.  
  56. /** Extract vaapi_context from an AVCodecContext */
  57. static inline FFVAContext *ff_vaapi_get_context(AVCodecContext *avctx)
  58. {
  59.     return avctx->internal->hwaccel_priv_data;
  60. }
  61.  
  62. /** Extract VASurfaceID from an AVFrame */
  63. static inline VASurfaceID ff_vaapi_get_surface_id(AVFrame *pic)
  64. {
  65.     return (uintptr_t)pic->data[3];
  66. }
  67.  
  68. /** Common AVHWAccel.init() implementation */
  69. int ff_vaapi_context_init(AVCodecContext *avctx);
  70.  
  71. /** Common AVHWAccel.uninit() implementation */
  72. int ff_vaapi_context_fini(AVCodecContext *avctx);
  73.  
  74. /** Common AVHWAccel.end_frame() implementation */
  75. void ff_vaapi_common_end_frame(AVCodecContext *avctx);
  76.  
  77. /** Allocate a new picture parameter buffer */
  78. void *ff_vaapi_alloc_pic_param(FFVAContext *vactx, unsigned int size);
  79.  
  80. /** Allocate a new IQ matrix buffer */
  81. void *ff_vaapi_alloc_iq_matrix(FFVAContext *vactx, unsigned int size);
  82.  
  83. /** Allocate a new bit-plane buffer */
  84. uint8_t *ff_vaapi_alloc_bitplane(FFVAContext *vactx, uint32_t size);
  85.  
  86. /**
  87.  * Allocate a new slice descriptor for the input slice.
  88.  *
  89.  * @param vactx the VA API context
  90.  * @param buffer the slice data buffer base
  91.  * @param size the size of the slice in bytes
  92.  * @return the newly allocated slice parameter
  93.  */
  94. VASliceParameterBufferBase *ff_vaapi_alloc_slice(FFVAContext *vactx, const uint8_t *buffer, uint32_t size);
  95.  
  96. int ff_vaapi_mpeg_end_frame(AVCodecContext *avctx);
  97. int ff_vaapi_commit_slices(FFVAContext *vactx);
  98. int ff_vaapi_render_picture(FFVAContext *vactx, VASurfaceID surface);
  99.  
  100. /* @} */
  101.  
  102. #endif /* AVCODEC_VAAPI_INTERNAL_H */
  103.