FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
dxva2.c
Go to the documentation of this file.
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 <assert.h>
24 #include <string.h>
25 
26 #include "libavutil/log.h"
27 #include "libavutil/time.h"
28 
29 #include "avcodec.h"
30 #include "mpegvideo.h"
31 #include "dxva2_internal.h"
32 
33 void *ff_dxva2_get_surface(const Picture *picture)
34 {
35  return picture->f.data[3];
36 }
37 
38 unsigned ff_dxva2_get_surface_index(const struct dxva_context *ctx,
39  const Picture *picture)
40 {
41  void *surface = ff_dxva2_get_surface(picture);
42  unsigned i;
43 
44  for (i = 0; i < ctx->surface_count; i++)
45  if (ctx->surface[i] == surface)
46  return i;
47 
48  assert(0);
49  return 0;
50 }
51 
53  struct dxva_context *ctx,
54  DXVA2_DecodeBufferDesc *dsc,
55  unsigned type, const void *data, unsigned size,
56  unsigned mb_count)
57 {
58  void *dxva_data;
59  unsigned dxva_size;
60  int result;
61  HRESULT hr;
62 
63  hr = IDirectXVideoDecoder_GetBuffer(ctx->decoder, type,
64  &dxva_data, &dxva_size);
65  if (FAILED(hr)) {
66  av_log(avctx, AV_LOG_ERROR, "Failed to get a buffer for %u: 0x%lx\n",
67  type, hr);
68  return -1;
69  }
70  if (size <= dxva_size) {
71  memcpy(dxva_data, data, size);
72 
73  memset(dsc, 0, sizeof(*dsc));
74  dsc->CompressedBufferType = type;
75  dsc->DataSize = size;
76  dsc->NumMBsInBuffer = mb_count;
77 
78  result = 0;
79  } else {
80  av_log(avctx, AV_LOG_ERROR, "Buffer for type %u was too small\n", type);
81  result = -1;
82  }
83 
84  hr = IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder, type);
85  if (FAILED(hr)) {
86  av_log(avctx, AV_LOG_ERROR,
87  "Failed to release buffer type %u: 0x%lx\n",
88  type, hr);
89  result = -1;
90  }
91  return result;
92 }
93 
95  const void *pp, unsigned pp_size,
96  const void *qm, unsigned qm_size,
97  int (*commit_bs_si)(AVCodecContext *,
98  DXVA2_DecodeBufferDesc *bs,
99  DXVA2_DecodeBufferDesc *slice))
100 {
101  struct dxva_context *ctx = avctx->hwaccel_context;
102  unsigned buffer_count = 0;
103  DXVA2_DecodeBufferDesc buffer[4];
104  DXVA2_DecodeExecuteParams exec = { 0 };
105  int result, runs = 0;
106  HRESULT hr;
107 
108  do {
109  hr = IDirectXVideoDecoder_BeginFrame(ctx->decoder,
111  NULL);
112  if (hr == E_PENDING)
113  av_usleep(2000);
114  } while (hr == E_PENDING && ++runs < 50);
115 
116  if (FAILED(hr)) {
117  av_log(avctx, AV_LOG_ERROR, "Failed to begin frame: 0x%lx\n", hr);
118  return -1;
119  }
120 
121  result = ff_dxva2_commit_buffer(avctx, ctx, &buffer[buffer_count],
122  DXVA2_PictureParametersBufferType,
123  pp, pp_size, 0);
124  if (result) {
125  av_log(avctx, AV_LOG_ERROR,
126  "Failed to add picture parameter buffer\n");
127  goto end;
128  }
129  buffer_count++;
130 
131  if (qm_size > 0) {
132  result = ff_dxva2_commit_buffer(avctx, ctx, &buffer[buffer_count],
133  DXVA2_InverseQuantizationMatrixBufferType,
134  qm, qm_size, 0);
135  if (result) {
136  av_log(avctx, AV_LOG_ERROR,
137  "Failed to add inverse quantization matrix buffer\n");
138  goto end;
139  }
140  buffer_count++;
141  }
142 
143  result = commit_bs_si(avctx,
144  &buffer[buffer_count + 0],
145  &buffer[buffer_count + 1]);
146  if (result) {
147  av_log(avctx, AV_LOG_ERROR,
148  "Failed to add bitstream or slice control buffer\n");
149  goto end;
150  }
151  buffer_count += 2;
152 
153  /* TODO Film Grain when possible */
154 
155  assert(buffer_count == 1 + (qm_size > 0) + 2);
156 
157  exec.NumCompBuffers = buffer_count;
158  exec.pCompressedBuffers = buffer;
159  exec.pExtensionData = NULL;
160  hr = IDirectXVideoDecoder_Execute(ctx->decoder, &exec);
161  if (FAILED(hr)) {
162  av_log(avctx, AV_LOG_ERROR, "Failed to execute: 0x%lx\n", hr);
163  result = -1;
164  }
165 
166 end:
167  hr = IDirectXVideoDecoder_EndFrame(ctx->decoder, NULL);
168  if (FAILED(hr)) {
169  av_log(avctx, AV_LOG_ERROR, "Failed to end frame: 0x%lx\n", hr);
170  result = -1;
171  }
172 
173  return result;
174 }