vaapi_mpeg2: Convert to use the new VAAPI hwaccel code
[libav.git] / libavcodec / vaapi_mpeg2.c
1 /*
2 * MPEG-2 HW decode acceleration through VA API
3 *
4 * Copyright (C) 2008-2009 Splitted-Desktop Systems
5 *
6 * This file is part of Libav.
7 *
8 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "mpegutils.h"
24 #include "mpegvideo.h"
25 #include "internal.h"
26 #include "vaapi_decode.h"
27
28 /** Reconstruct bitstream f_code */
29 static inline int mpeg2_get_f_code(const MpegEncContext *s)
30 {
31 return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
32 (s->mpeg_f_code[1][0] << 4) | s->mpeg_f_code[1][1];
33 }
34
35 /** Determine frame start: first field for field picture or frame picture */
36 static inline int mpeg2_get_is_frame_start(const MpegEncContext *s)
37 {
38 return s->first_field || s->picture_structure == PICT_FRAME;
39 }
40
41 static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
42 {
43 const MpegEncContext *s = avctx->priv_data;
44 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
45 VAPictureParameterBufferMPEG2 pic_param;
46 VAIQMatrixBufferMPEG2 iq_matrix;
47 int i, err;
48
49 pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
50
51 pic_param = (VAPictureParameterBufferMPEG2) {
52 .horizontal_size = s->width,
53 .vertical_size = s->height,
54 .forward_reference_picture = VA_INVALID_ID,
55 .backward_reference_picture = VA_INVALID_ID,
56 .picture_coding_type = s->pict_type,
57 .f_code = mpeg2_get_f_code(s),
58 .picture_coding_extension.bits = {
59 .intra_dc_precision = s->intra_dc_precision,
60 .picture_structure = s->picture_structure,
61 .top_field_first = s->top_field_first,
62 .frame_pred_frame_dct = s->frame_pred_frame_dct,
63 .concealment_motion_vectors = s->concealment_motion_vectors,
64 .q_scale_type = s->q_scale_type,
65 .intra_vlc_format = s->intra_vlc_format,
66 .alternate_scan = s->alternate_scan,
67 .repeat_first_field = s->repeat_first_field,
68 .progressive_frame = s->progressive_frame,
69 .is_first_field = mpeg2_get_is_frame_start(s),
70 },
71 };
72
73 switch (s->pict_type) {
74 case AV_PICTURE_TYPE_B:
75 pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
76 // fall-through
77 case AV_PICTURE_TYPE_P:
78 pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
79 break;
80 }
81
82 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
83 VAPictureParameterBufferType,
84 &pic_param, sizeof(pic_param));
85 if (err < 0)
86 goto fail;
87
88 iq_matrix.load_intra_quantiser_matrix = 1;
89 iq_matrix.load_non_intra_quantiser_matrix = 1;
90 iq_matrix.load_chroma_intra_quantiser_matrix = 1;
91 iq_matrix.load_chroma_non_intra_quantiser_matrix = 1;
92
93 for (i = 0; i < 64; i++) {
94 int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
95 iq_matrix.intra_quantiser_matrix[i] = s->intra_matrix[n];
96 iq_matrix.non_intra_quantiser_matrix[i] = s->inter_matrix[n];
97 iq_matrix.chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n];
98 iq_matrix.chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
99 }
100
101 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
102 VAIQMatrixBufferType,
103 &iq_matrix, sizeof(iq_matrix));
104 if (err < 0)
105 goto fail;
106
107 return 0;
108
109 fail:
110 ff_vaapi_decode_cancel(avctx, pic);
111 return err;
112 }
113
114 static int vaapi_mpeg2_end_frame(AVCodecContext *avctx)
115 {
116 MpegEncContext *s = avctx->priv_data;
117 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
118 int ret;
119
120 ret = ff_vaapi_decode_issue(avctx, pic);
121 if (ret < 0)
122 goto fail;
123
124 ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
125
126 fail:
127 return ret;
128 }
129
130 static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
131 {
132 const MpegEncContext *s = avctx->priv_data;
133 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
134 VASliceParameterBufferMPEG2 slice_param;
135 GetBitContext gb;
136 uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
137 int err;
138
139 /* Determine macroblock_offset */
140 init_get_bits(&gb, buffer, 8 * size);
141 if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
142 return AVERROR_INVALIDDATA;
143 quantiser_scale_code = get_bits(&gb, 5);
144 intra_slice_flag = get_bits1(&gb);
145 if (intra_slice_flag) {
146 skip_bits(&gb, 8);
147 while (get_bits1(&gb) != 0)
148 skip_bits(&gb, 8);
149 }
150 macroblock_offset = get_bits_count(&gb);
151
152 slice_param = (VASliceParameterBufferMPEG2) {
153 .slice_data_size = size,
154 .slice_data_offset = 0,
155 .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
156 .macroblock_offset = macroblock_offset,
157 .slice_horizontal_position = s->mb_x,
158 .slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME),
159 .quantiser_scale_code = quantiser_scale_code,
160 .intra_slice_flag = intra_slice_flag,
161 };
162
163 err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
164 &slice_param, sizeof(slice_param),
165 buffer, size);
166 if (err < 0) {
167 ff_vaapi_decode_cancel(avctx, pic);
168 return err;
169 }
170
171
172 return 0;
173 }
174
175 AVHWAccel ff_mpeg2_vaapi_hwaccel = {
176 .name = "mpeg2_vaapi",
177 .type = AVMEDIA_TYPE_VIDEO,
178 .id = AV_CODEC_ID_MPEG2VIDEO,
179 .pix_fmt = AV_PIX_FMT_VAAPI,
180 .start_frame = &vaapi_mpeg2_start_frame,
181 .end_frame = &vaapi_mpeg2_end_frame,
182 .decode_slice = &vaapi_mpeg2_decode_slice,
183 .frame_priv_data_size = sizeof(VAAPIDecodePicture),
184 .init = &ff_vaapi_decode_init,
185 .uninit = &ff_vaapi_decode_uninit,
186 .priv_data_size = sizeof(VAAPIDecodeContext),
187 };