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path: root/libavcodec/vaapi_mpeg4.c (plain)
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1/*
2 * MPEG-4 / H.263 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 "h263.h"
24#include "hwaccel.h"
25#include "internal.h"
26#include "mpeg4video.h"
27#include "mpegvideo.h"
28#include "vaapi_decode.h"
29
30/** Reconstruct bitstream intra_dc_vlc_thr */
31static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
32{
33 switch (s->intra_dc_threshold) {
34 case 99: return 0;
35 case 13: return 1;
36 case 15: return 2;
37 case 17: return 3;
38 case 19: return 4;
39 case 21: return 5;
40 case 23: return 6;
41 case 0: return 7;
42 }
43 return 0;
44}
45
46static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
47{
48 Mpeg4DecContext *ctx = avctx->priv_data;
49 MpegEncContext *s = &ctx->m;
50 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
51 VAPictureParameterBufferMPEG4 pic_param;
52 int i, err;
53
54 pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
55
56 pic_param = (VAPictureParameterBufferMPEG4) {
57 .vop_width = s->width,
58 .vop_height = s->height,
59 .forward_reference_picture = VA_INVALID_ID,
60 .backward_reference_picture = VA_INVALID_ID,
61 .vol_fields.bits = {
62 .short_video_header = avctx->codec->id == AV_CODEC_ID_H263,
63 .chroma_format = CHROMA_420,
64 .interlaced = !s->progressive_sequence,
65 .obmc_disable = 1,
66 .sprite_enable = ctx->vol_sprite_usage,
67 .sprite_warping_accuracy = s->sprite_warping_accuracy,
68 .quant_type = s->mpeg_quant,
69 .quarter_sample = s->quarter_sample,
70 .data_partitioned = s->data_partitioning,
71 .reversible_vlc = ctx->rvlc,
72 .resync_marker_disable = !ctx->resync_marker,
73 },
74 .no_of_sprite_warping_points = ctx->num_sprite_warping_points,
75 .quant_precision = s->quant_precision,
76 .vop_fields.bits = {
77 .vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I,
78 .backward_reference_vop_coding_type =
79 s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
80 .vop_rounding_type = s->no_rounding,
81 .intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx),
82 .top_field_first = s->top_field_first,
83 .alternate_vertical_scan_flag = s->alternate_scan,
84 },
85 .vop_fcode_forward = s->f_code,
86 .vop_fcode_backward = s->b_code,
87 .vop_time_increment_resolution = avctx->framerate.num,
88 .num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height),
89 .num_gobs_in_vop =
90 (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
91 .TRB = s->pb_time,
92 .TRD = s->pp_time,
93 };
94
95 for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
96 pic_param.sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
97 pic_param.sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
98 }
99
100 if (s->pict_type == AV_PICTURE_TYPE_B)
101 pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
102 if (s->pict_type != AV_PICTURE_TYPE_I)
103 pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
104
105 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
106 VAPictureParameterBufferType,
107 &pic_param, sizeof(pic_param));
108 if (err < 0)
109 goto fail;
110
111 /* Only the first inverse quantisation method uses the weighting matrices */
112 if (pic_param.vol_fields.bits.quant_type) {
113 VAIQMatrixBufferMPEG4 iq_matrix;
114
115 iq_matrix.load_intra_quant_mat = 1;
116 iq_matrix.load_non_intra_quant_mat = 1;
117
118 for (i = 0; i < 64; i++) {
119 int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
120 iq_matrix.intra_quant_mat[i] = s->intra_matrix[n];
121 iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
122 }
123
124 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
125 VAIQMatrixBufferType,
126 &iq_matrix, sizeof(iq_matrix));
127 if (err < 0)
128 goto fail;
129 }
130 return 0;
131
132fail:
133 ff_vaapi_decode_cancel(avctx, pic);
134 return err;
135}
136
137static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
138{
139 MpegEncContext *s = avctx->priv_data;
140 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
141 int ret;
142
143 ret = ff_vaapi_decode_issue(avctx, pic);
144 if (ret < 0)
145 goto fail;
146
147 ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
148
149fail:
150 return ret;
151}
152
153static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
154{
155 MpegEncContext *s = avctx->priv_data;
156 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
157 VASliceParameterBufferMPEG4 slice_param;
158 int err;
159
160 slice_param = (VASliceParameterBufferMPEG4) {
161 .slice_data_size = size,
162 .slice_data_offset = 0,
163 .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
164 .macroblock_offset = get_bits_count(&s->gb) % 8,
165 .macroblock_number = 0,
166 .quant_scale = s->qscale,
167 };
168
169 err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
170 &slice_param, sizeof(slice_param),
171 buffer, size);
172 if (err < 0) {
173 ff_vaapi_decode_cancel(avctx, pic);
174 return err;
175 }
176
177 return 0;
178}
179
180#if CONFIG_MPEG4_VAAPI_HWACCEL
181AVHWAccel ff_mpeg4_vaapi_hwaccel = {
182 .name = "mpeg4_vaapi",
183 .type = AVMEDIA_TYPE_VIDEO,
184 .id = AV_CODEC_ID_MPEG4,
185 .pix_fmt = AV_PIX_FMT_VAAPI,
186 .start_frame = &vaapi_mpeg4_start_frame,
187 .end_frame = &vaapi_mpeg4_end_frame,
188 .decode_slice = &vaapi_mpeg4_decode_slice,
189 .frame_priv_data_size = sizeof(VAAPIDecodePicture),
190 .init = &ff_vaapi_decode_init,
191 .uninit = &ff_vaapi_decode_uninit,
192 .priv_data_size = sizeof(VAAPIDecodeContext),
193 .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
194};
195#endif
196
197#if CONFIG_H263_VAAPI_HWACCEL
198AVHWAccel ff_h263_vaapi_hwaccel = {
199 .name = "h263_vaapi",
200 .type = AVMEDIA_TYPE_VIDEO,
201 .id = AV_CODEC_ID_H263,
202 .pix_fmt = AV_PIX_FMT_VAAPI,
203 .start_frame = &vaapi_mpeg4_start_frame,
204 .end_frame = &vaapi_mpeg4_end_frame,
205 .decode_slice = &vaapi_mpeg4_decode_slice,
206 .frame_priv_data_size = sizeof(VAAPIDecodePicture),
207 .init = &ff_vaapi_decode_init,
208 .uninit = &ff_vaapi_decode_uninit,
209 .priv_data_size = sizeof(VAAPIDecodeContext),
210 .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
211};
212#endif
213
generated by cgit at 2024-05-17 18:35:05 (GMT)