1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* MPEG-2 HW decode acceleration through VA API
*
* Copyright (C) 2008-2009 Splitted-Desktop Systems
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "mpegutils.h"
#include "vaapi_internal.h"
/** Reconstruct bitstream f_code */
static inline int mpeg2_get_f_code(MpegEncContext *s)
{
return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
(s->mpeg_f_code[1][0] << 4) | s->mpeg_f_code[1][1];
}
/** Determine frame start: first field for field picture or frame picture */
static inline int mpeg2_get_is_frame_start(MpegEncContext *s)
{
return s->first_field || s->picture_structure == PICT_FRAME;
}
static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
{
struct MpegEncContext * const s = avctx->priv_data;
struct vaapi_context * const vactx = avctx->hwaccel_context;
VAPictureParameterBufferMPEG2 *pic_param;
VAIQMatrixBufferMPEG2 *iq_matrix;
int i;
ff_dlog(avctx, "vaapi_mpeg2_start_frame()\n");
vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG2);
/* Fill in VAPictureParameterBufferMPEG2 */
pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG2));
if (!pic_param)
return -1;
pic_param->horizontal_size = s->width;
pic_param->vertical_size = s->height;
pic_param->forward_reference_picture = VA_INVALID_ID;
pic_param->backward_reference_picture = VA_INVALID_ID;
pic_param->picture_coding_type = s->pict_type;
pic_param->f_code = mpeg2_get_f_code(s);
pic_param->picture_coding_extension.value = 0; /* reset all bits */
pic_param->picture_coding_extension.bits.intra_dc_precision = s->intra_dc_precision;
pic_param->picture_coding_extension.bits.picture_structure = s->picture_structure;
pic_param->picture_coding_extension.bits.top_field_first = s->top_field_first;
pic_param->picture_coding_extension.bits.frame_pred_frame_dct = s->frame_pred_frame_dct;
pic_param->picture_coding_extension.bits.concealment_motion_vectors = s->concealment_motion_vectors;
pic_param->picture_coding_extension.bits.q_scale_type = s->q_scale_type;
pic_param->picture_coding_extension.bits.intra_vlc_format = s->intra_vlc_format;
pic_param->picture_coding_extension.bits.alternate_scan = s->alternate_scan;
pic_param->picture_coding_extension.bits.repeat_first_field = s->repeat_first_field;
pic_param->picture_coding_extension.bits.progressive_frame = s->progressive_frame;
pic_param->picture_coding_extension.bits.is_first_field = mpeg2_get_is_frame_start(s);
switch (s->pict_type) {
case AV_PICTURE_TYPE_B:
pic_param->backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
// fall-through
case AV_PICTURE_TYPE_P:
pic_param->forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
break;
}
/* Fill in VAIQMatrixBufferMPEG2 */
iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG2));
if (!iq_matrix)
return -1;
iq_matrix->load_intra_quantiser_matrix = 1;
iq_matrix->load_non_intra_quantiser_matrix = 1;
iq_matrix->load_chroma_intra_quantiser_matrix = 1;
iq_matrix->load_chroma_non_intra_quantiser_matrix = 1;
for (i = 0; i < 64; i++) {
int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
iq_matrix->intra_quantiser_matrix[i] = s->intra_matrix[n];
iq_matrix->non_intra_quantiser_matrix[i] = s->inter_matrix[n];
iq_matrix->chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n];
iq_matrix->chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
}
return 0;
}
static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
{
MpegEncContext * const s = avctx->priv_data;
VASliceParameterBufferMPEG2 *slice_param;
GetBitContext gb;
uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
ff_dlog(avctx, "vaapi_mpeg2_decode_slice(): buffer %p, size %d\n", buffer, size);
/* Determine macroblock_offset */
init_get_bits(&gb, buffer, 8 * size);
if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
return AVERROR_INVALIDDATA;
quantiser_scale_code = get_bits(&gb, 5);
intra_slice_flag = get_bits1(&gb);
if (intra_slice_flag) {
skip_bits(&gb, 8);
while (get_bits1(&gb) != 0)
skip_bits(&gb, 8);
}
macroblock_offset = get_bits_count(&gb);
/* Fill in VASliceParameterBufferMPEG2 */
slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
if (!slice_param)
return -1;
slice_param->macroblock_offset = macroblock_offset;
slice_param->slice_horizontal_position = s->mb_x;
slice_param->slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME);
slice_param->quantiser_scale_code = quantiser_scale_code;
slice_param->intra_slice_flag = intra_slice_flag;
return 0;
}
AVHWAccel ff_mpeg2_vaapi_hwaccel = {
.name = "mpeg2_vaapi",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG2VIDEO,
.pix_fmt = AV_PIX_FMT_VAAPI_VLD,
.start_frame = vaapi_mpeg2_start_frame,
.end_frame = ff_vaapi_mpeg_end_frame,
.decode_slice = vaapi_mpeg2_decode_slice,
};
|
