/*
  * Video Acceleration API (video decoding)
  * HW decode acceleration for MPEG-2, MPEG-4, H.264 and VC-1
  *
  * Copyright (C) 2008-2009 Splitted-Desktop Systems
  *
  * 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
  */
 

 #include "h264.h"

 #include "vaapi_internal.h"
 
 /**

  * @addtogroup VAAPI_Decoding

  *
  * @{
  */
 
 static void destroy_buffers(VADisplay display, VABufferID *buffers, unsigned int n_buffers)
 {
     unsigned int i;
     for (i = 0; i < n_buffers; i++) {
         if (buffers[i]) {
             vaDestroyBuffer(display, buffers[i]);
             buffers[i] = 0;
         }
     }
 }
 

 int ff_vaapi_render_picture(struct vaapi_context *vactx, VASurfaceID surface)

 {
     VABufferID va_buffers[3];
     unsigned int n_va_buffers = 0;
 

     if (!vactx->pic_param_buf_id)
         return 0;
 

     vaUnmapBuffer(vactx->display, vactx->pic_param_buf_id);

     va_buffers[n_va_buffers++] = vactx->pic_param_buf_id;
 

     if (vactx->iq_matrix_buf_id) {
         vaUnmapBuffer(vactx->display, vactx->iq_matrix_buf_id);

         va_buffers[n_va_buffers++] = vactx->iq_matrix_buf_id;
     }
 

     if (vactx->bitplane_buf_id) {
         vaUnmapBuffer(vactx->display, vactx->bitplane_buf_id);

         va_buffers[n_va_buffers++] = vactx->bitplane_buf_id;
     }
 
     if (vaBeginPicture(vactx->display, vactx->context_id,
                        surface) != VA_STATUS_SUCCESS)
         return -1;
 
     if (vaRenderPicture(vactx->display, vactx->context_id,
                         va_buffers, n_va_buffers) != VA_STATUS_SUCCESS)
         return -1;
 
     if (vaRenderPicture(vactx->display, vactx->context_id,
                         vactx->slice_buf_ids,
                         vactx->n_slice_buf_ids) != VA_STATUS_SUCCESS)
         return -1;
 
     if (vaEndPicture(vactx->display, vactx->context_id) != VA_STATUS_SUCCESS)
         return -1;
 
     return 0;
 }
 

 int ff_vaapi_commit_slices(struct vaapi_context *vactx)

 {
     VABufferID *slice_buf_ids;
     VABufferID slice_param_buf_id, slice_data_buf_id;
 
     if (vactx->slice_count == 0)
         return 0;
 
     slice_buf_ids =
         av_fast_realloc(vactx->slice_buf_ids,
                         &vactx->slice_buf_ids_alloc,
                         (vactx->n_slice_buf_ids + 2) * sizeof(slice_buf_ids[0]));
     if (!slice_buf_ids)
         return -1;
     vactx->slice_buf_ids = slice_buf_ids;
 
     slice_param_buf_id = 0;
     if (vaCreateBuffer(vactx->display, vactx->context_id,
                        VASliceParameterBufferType,
                        vactx->slice_param_size,
                        vactx->slice_count, vactx->slice_params,
                        &slice_param_buf_id) != VA_STATUS_SUCCESS)
         return -1;
     vactx->slice_count = 0;
 
     slice_data_buf_id = 0;
     if (vaCreateBuffer(vactx->display, vactx->context_id,
                        VASliceDataBufferType,
                        vactx->slice_data_size,
                        1, (void *)vactx->slice_data,
                        &slice_data_buf_id) != VA_STATUS_SUCCESS)
         return -1;
     vactx->slice_data = NULL;
     vactx->slice_data_size = 0;
 
     slice_buf_ids[vactx->n_slice_buf_ids++] = slice_param_buf_id;
     slice_buf_ids[vactx->n_slice_buf_ids++] = slice_data_buf_id;
     return 0;
 }
 

 static void *alloc_buffer(struct vaapi_context *vactx, int type, unsigned int size, uint32_t *buf_id)
 {
     void *data = NULL;
 
     *buf_id = 0;
     if (vaCreateBuffer(vactx->display, vactx->context_id,
                        type, size, 1, NULL, buf_id) == VA_STATUS_SUCCESS)
         vaMapBuffer(vactx->display, *buf_id, &data);
 
     return data;
 }
 

 void *ff_vaapi_alloc_pic_param(struct vaapi_context *vactx, unsigned int size)

 {
     return alloc_buffer(vactx, VAPictureParameterBufferType, size, &vactx->pic_param_buf_id);
 }
 
 void *ff_vaapi_alloc_iq_matrix(struct vaapi_context *vactx, unsigned int size)
 {
     return alloc_buffer(vactx, VAIQMatrixBufferType, size, &vactx->iq_matrix_buf_id);
 }
 
 uint8_t *ff_vaapi_alloc_bitplane(struct vaapi_context *vactx, uint32_t size)
 {
     return alloc_buffer(vactx, VABitPlaneBufferType, size, &vactx->bitplane_buf_id);
 }
 

 VASliceParameterBufferBase *ff_vaapi_alloc_slice(struct vaapi_context *vactx, const uint8_t *buffer, uint32_t size)
 {
     uint8_t *slice_params;
     VASliceParameterBufferBase *slice_param;
 
     if (!vactx->slice_data)
         vactx->slice_data = buffer;
     if (vactx->slice_data + vactx->slice_data_size != buffer) {

         if (ff_vaapi_commit_slices(vactx) < 0)

             return NULL;
         vactx->slice_data = buffer;
     }
 
     slice_params =
         av_fast_realloc(vactx->slice_params,
                         &vactx->slice_params_alloc,
                         (vactx->slice_count + 1) * vactx->slice_param_size);
     if (!slice_params)
         return NULL;
     vactx->slice_params = slice_params;
 
     slice_param = (VASliceParameterBufferBase *)(slice_params + vactx->slice_count * vactx->slice_param_size);
     slice_param->slice_data_size   = size;
     slice_param->slice_data_offset = vactx->slice_data_size;
     slice_param->slice_data_flag   = VA_SLICE_DATA_FLAG_ALL;
 
     vactx->slice_count++;
     vactx->slice_data_size += size;
     return slice_param;
 }
 

 void ff_vaapi_common_end_frame(AVCodecContext *avctx)

 {

     struct vaapi_context * const vactx = avctx->hwaccel_context;

     av_dlog(avctx, "ff_vaapi_common_end_frame()\n");

 
     destroy_buffers(vactx->display, &vactx->pic_param_buf_id, 1);
     destroy_buffers(vactx->display, &vactx->iq_matrix_buf_id, 1);
     destroy_buffers(vactx->display, &vactx->bitplane_buf_id, 1);
     destroy_buffers(vactx->display, vactx->slice_buf_ids, vactx->n_slice_buf_ids);
     av_freep(&vactx->slice_buf_ids);
     av_freep(&vactx->slice_params);
     vactx->n_slice_buf_ids     = 0;
     vactx->slice_buf_ids_alloc = 0;
     vactx->slice_count         = 0;
     vactx->slice_params_alloc  = 0;

 }
 

 /* @} */