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dxva2.c
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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 
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 
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,
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  if (!result)
150  ff_draw_horiz_band(s, 0, s->avctx->height);
151  return result;
152 }