libavcodec/dxva2.c

   1 /*
   2  * DXVA2 HW acceleration.
   3  *
   4  * copyright (c) 2010 Laurent Aimar
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav 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  * Libav 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 Libav; 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->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, MpegEncContext *s,
  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;
  90     int      result;
  91
  92     if (FAILED(IDirectXVideoDecoder_BeginFrame(ctx->decoder,
  93                                                ff_dxva2_get_surface(s->current_picture_ptr),
  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     memset(&exec, 0, sizeof(exec));
 136     exec.NumCompBuffers      = buffer_count;
 137     exec.pCompressedBuffers  = buffer;
 138     exec.pExtensionData      = NULL;
 139     if (FAILED(IDirectXVideoDecoder_Execute(ctx->decoder, &exec))) {
 140         av_log(avctx, AV_LOG_ERROR, "Failed to execute\n");
 141         result = -1;
 142     }
 143
 144 end:
 145     if (FAILED(IDirectXVideoDecoder_EndFrame(ctx->decoder, NULL))) {
 146         av_log(avctx, AV_LOG_ERROR, "Failed to end frame\n");
 147         result = -1;
 148     }
 149
 150     if (!result)
 151         ff_draw_horiz_band(s, 0, s->avctx->height);
 152     return result;
 153 }
 154