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  1. /*
  2.  * DXVA2 HW acceleration.
  3.  *
  4.  * copyright (c) 2010 Laurent Aimar
  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. #include "dxva2_internal.h"
  24.  
  25. void *ff_dxva2_get_surface(const Picture *picture)
  26. {
  27.     return picture->f.data[3];
  28. }
  29.  
  30. unsigned ff_dxva2_get_surface_index(const struct dxva_context *ctx,
  31.                                     const Picture *picture)
  32. {
  33.     void *surface = ff_dxva2_get_surface(picture);
  34.     unsigned i;
  35.  
  36.     for (i = 0; i < ctx->surface_count; i++)
  37.         if (ctx->surface[i] == surface)
  38.             return i;
  39.  
  40.     assert(0);
  41.     return 0;
  42. }
  43.  
  44. int ff_dxva2_commit_buffer(AVCodecContext *avctx,
  45.                            struct dxva_context *ctx,
  46.                            DXVA2_DecodeBufferDesc *dsc,
  47.                            unsigned type, const void *data, unsigned size,
  48.                            unsigned mb_count)
  49. {
  50.     void     *dxva_data;
  51.     unsigned dxva_size;
  52.     int      result;
  53.  
  54.     if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder, type,
  55.                                               &dxva_data, &dxva_size))) {
  56.         av_log(avctx, AV_LOG_ERROR, "Failed to get a buffer for %d\n", type);
  57.         return -1;
  58.     }
  59.     if (size <= dxva_size) {
  60.         memcpy(dxva_data, data, size);
  61.  
  62.         memset(dsc, 0, sizeof(*dsc));
  63.         dsc->CompressedBufferType = type;
  64.         dsc->DataSize             = size;
  65.         dsc->NumMBsInBuffer       = mb_count;
  66.  
  67.         result = 0;
  68.     } else {
  69.         av_log(avctx, AV_LOG_ERROR, "Buffer for type %d was too small\n", type);
  70.         result = -1;
  71.     }
  72.     if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder, type))) {
  73.         av_log(avctx, AV_LOG_ERROR, "Failed to release buffer type %d\n", type);
  74.         result = -1;
  75.     }
  76.     return result;
  77. }
  78.  
  79. int ff_dxva2_common_end_frame(AVCodecContext *avctx, Picture *pic,
  80.                               const void *pp, unsigned pp_size,
  81.                               const void *qm, unsigned qm_size,
  82.                               int (*commit_bs_si)(AVCodecContext *,
  83.                                                   DXVA2_DecodeBufferDesc *bs,
  84.                                                   DXVA2_DecodeBufferDesc *slice))
  85. {
  86.     struct dxva_context *ctx = avctx->hwaccel_context;
  87.     unsigned               buffer_count = 0;
  88.     DXVA2_DecodeBufferDesc buffer[4];
  89.     DXVA2_DecodeExecuteParams exec = { 0 };
  90.     int      result;
  91.  
  92.     if (FAILED(IDirectXVideoDecoder_BeginFrame(ctx->decoder,
  93.                                                ff_dxva2_get_surface(pic),
  94.                                                NULL))) {
  95.         av_log(avctx, AV_LOG_ERROR, "Failed to begin frame\n");
  96.         return -1;
  97.     }
  98.  
  99.     result = ff_dxva2_commit_buffer(avctx, ctx, &buffer[buffer_count],
  100.                                     DXVA2_PictureParametersBufferType,
  101.                                     pp, pp_size, 0);
  102.     if (result) {
  103.         av_log(avctx, AV_LOG_ERROR,
  104.                "Failed to add picture parameter buffer\n");
  105.         goto end;
  106.     }
  107.     buffer_count++;
  108.  
  109.     if (qm_size > 0) {
  110.         result = ff_dxva2_commit_buffer(avctx, ctx, &buffer[buffer_count],
  111.                                         DXVA2_InverseQuantizationMatrixBufferType,
  112.                                         qm, qm_size, 0);
  113.         if (result) {
  114.             av_log(avctx, AV_LOG_ERROR,
  115.                    "Failed to add inverse quantization matrix buffer\n");
  116.             goto end;
  117.         }
  118.         buffer_count++;
  119.     }
  120.  
  121.     result = commit_bs_si(avctx,
  122.                           &buffer[buffer_count + 0],
  123.                           &buffer[buffer_count + 1]);
  124.     if (result) {
  125.         av_log(avctx, AV_LOG_ERROR,
  126.                "Failed to add bitstream or slice control buffer\n");
  127.         goto end;
  128.     }
  129.     buffer_count += 2;
  130.  
  131.     /* TODO Film Grain when possible */
  132.  
  133.     assert(buffer_count == 1 + (qm_size > 0) + 2);
  134.  
  135.     exec.NumCompBuffers      = buffer_count;
  136.     exec.pCompressedBuffers  = buffer;
  137.     exec.pExtensionData      = NULL;
  138.     if (FAILED(IDirectXVideoDecoder_Execute(ctx->decoder, &exec))) {
  139.         av_log(avctx, AV_LOG_ERROR, "Failed to execute\n");
  140.         result = -1;
  141.     }
  142.  
  143. end:
  144.     if (FAILED(IDirectXVideoDecoder_EndFrame(ctx->decoder, NULL))) {
  145.         av_log(avctx, AV_LOG_ERROR, "Failed to end frame\n");
  146.         result = -1;
  147.     }
  148.  
  149.     return result;
  150. }
  151.