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
25void *ff_dxva2_get_surface(const Picture *picture)
26{
27    return picture->data[3];
28}
29
30unsigned 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
44int 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
79int 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
144end:
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
155