d8660710d693eeb10a17c5f2663df97161b7b019
[ffmpeg.git] / libavcodec / dxva2.c
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, 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 = { 0 };
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     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 }