FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/vaapi_mpeg2.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 0 81 0.0%
Branches: 0 23 0.0%

Line Branch Exec Source
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 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 "hwconfig.h"
24 #include "mpegutils.h"
25 #include "mpegvideo.h"
26 #include "internal.h"
27 #include "vaapi_decode.h"
28
29 /** Reconstruct bitstream f_code */
30 static inline int mpeg2_get_f_code(const MpegEncContext *s)
31 {
32 return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
33 (s->mpeg_f_code[1][0] << 4) | s->mpeg_f_code[1][1];
34 }
35
36 /** Determine frame start: first field for field picture or frame picture */
37 static inline int mpeg2_get_is_frame_start(const MpegEncContext *s)
38 {
39 return s->first_field || s->picture_structure == PICT_FRAME;
40 }
41
42 static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
43 {
44 const MpegEncContext *s = avctx->priv_data;
45 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
46 VAPictureParameterBufferMPEG2 pic_param;
47 VAIQMatrixBufferMPEG2 iq_matrix;
48 int i, err;
49
50 pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
51
52 pic_param = (VAPictureParameterBufferMPEG2) {
53 .horizontal_size = s->width,
54 .vertical_size = s->height,
55 .forward_reference_picture = VA_INVALID_ID,
56 .backward_reference_picture = VA_INVALID_ID,
57 .picture_coding_type = s->pict_type,
58 .f_code = mpeg2_get_f_code(s),
59 .picture_coding_extension.bits = {
60 .intra_dc_precision = s->intra_dc_precision,
61 .picture_structure = s->picture_structure,
62 .top_field_first = s->top_field_first,
63 .frame_pred_frame_dct = s->frame_pred_frame_dct,
64 .concealment_motion_vectors = s->concealment_motion_vectors,
65 .q_scale_type = s->q_scale_type,
66 .intra_vlc_format = s->intra_vlc_format,
67 .alternate_scan = s->alternate_scan,
68 .repeat_first_field = s->repeat_first_field,
69 .progressive_frame = s->progressive_frame,
70 .is_first_field = mpeg2_get_is_frame_start(s),
71 },
72 };
73
74 switch (s->pict_type) {
75 case AV_PICTURE_TYPE_B:
76 pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
77 // fall-through
78 case AV_PICTURE_TYPE_P:
79 pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
80 break;
81 }
82
83 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
84 VAPictureParameterBufferType,
85 &pic_param, sizeof(pic_param));
86 if (err < 0)
87 goto fail;
88
89 iq_matrix.load_intra_quantiser_matrix = 1;
90 iq_matrix.load_non_intra_quantiser_matrix = 1;
91 iq_matrix.load_chroma_intra_quantiser_matrix = 1;
92 iq_matrix.load_chroma_non_intra_quantiser_matrix = 1;
93
94 for (i = 0; i < 64; i++) {
95 int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
96 iq_matrix.intra_quantiser_matrix[i] = s->intra_matrix[n];
97 iq_matrix.non_intra_quantiser_matrix[i] = s->inter_matrix[n];
98 iq_matrix.chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n];
99 iq_matrix.chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
100 }
101
102 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
103 VAIQMatrixBufferType,
104 &iq_matrix, sizeof(iq_matrix));
105 if (err < 0)
106 goto fail;
107
108 return 0;
109
110 fail:
111 ff_vaapi_decode_cancel(avctx, pic);
112 return err;
113 }
114
115 static int vaapi_mpeg2_end_frame(AVCodecContext *avctx)
116 {
117 MpegEncContext *s = avctx->priv_data;
118 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
119 int ret;
120
121 ret = ff_vaapi_decode_issue(avctx, pic);
122 if (ret < 0)
123 goto fail;
124
125 ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
126
127 fail:
128 return ret;
129 }
130
131 static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
132 {
133 const MpegEncContext *s = avctx->priv_data;
134 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
135 VASliceParameterBufferMPEG2 slice_param;
136 GetBitContext gb;
137 uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
138 int err;
139
140 /* Determine macroblock_offset */
141 init_get_bits(&gb, buffer, 8 * size);
142 if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
143 return AVERROR_INVALIDDATA;
144 quantiser_scale_code = get_bits(&gb, 5);
145 intra_slice_flag = get_bits1(&gb);
146 if (intra_slice_flag) {
147 skip_bits(&gb, 8);
148 if (skip_1stop_8data_bits(&gb) < 0)
149 return AVERROR_INVALIDDATA;
150 }
151 macroblock_offset = get_bits_count(&gb);
152
153 slice_param = (VASliceParameterBufferMPEG2) {
154 .slice_data_size = size,
155 .slice_data_offset = 0,
156 .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
157 .macroblock_offset = macroblock_offset,
158 .slice_horizontal_position = s->mb_x,
159 .slice_vertical_position = s->mb_y >> (s->picture_structure != PICT_FRAME),
160 .quantiser_scale_code = quantiser_scale_code,
161 .intra_slice_flag = intra_slice_flag,
162 };
163
164 err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
165 &slice_param, sizeof(slice_param),
166 buffer, size);
167 if (err < 0) {
168 ff_vaapi_decode_cancel(avctx, pic);
169 return err;
170 }
171
172 return 0;
173 }
174
175 const 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 .frame_params = &ff_vaapi_common_frame_params,
187 .priv_data_size = sizeof(VAAPIDecodeContext),
188 .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
189 };
190