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 "config_components.h"
24
25 #include "h263.h"
26 #include "hwconfig.h"
27 #include "mpeg4videodec.h"
28 #include "mpegvideo.h"
29 #include "mpegvideodec.h"
30 #include "vaapi_decode.h"
31
32 /** Reconstruct bitstream intra_dc_vlc_thr */
mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext * s)33 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
34 {
35 switch (s->intra_dc_threshold) {
36 case 99: return 0;
37 case 13: return 1;
38 case 15: return 2;
39 case 17: return 3;
40 case 19: return 4;
41 case 21: return 5;
42 case 23: return 6;
43 case 0: return 7;
44 }
45 return 0;
46 }
47
vaapi_mpeg4_start_frame(AVCodecContext * avctx,av_unused const uint8_t * buffer,av_unused uint32_t size)48 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
49 {
50 Mpeg4DecContext *ctx = avctx->priv_data;
51 MpegEncContext *s = &ctx->m;
52 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
53 VAPictureParameterBufferMPEG4 pic_param;
54 int i, err;
55
56 pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
57
58 pic_param = (VAPictureParameterBufferMPEG4) {
59 .vop_width = s->width,
60 .vop_height = s->height,
61 .forward_reference_picture = VA_INVALID_ID,
62 .backward_reference_picture = VA_INVALID_ID,
63 .vol_fields.bits = {
64 .short_video_header = avctx->codec->id == AV_CODEC_ID_H263,
65 .chroma_format = CHROMA_420,
66 .interlaced = !s->progressive_sequence,
67 .obmc_disable = 1,
68 .sprite_enable = ctx->vol_sprite_usage,
69 .sprite_warping_accuracy = s->sprite_warping_accuracy,
70 .quant_type = s->mpeg_quant,
71 .quarter_sample = s->quarter_sample,
72 .data_partitioned = s->data_partitioning,
73 .reversible_vlc = ctx->rvlc,
74 .resync_marker_disable = !ctx->resync_marker,
75 },
76 .no_of_sprite_warping_points = ctx->num_sprite_warping_points,
77 .quant_precision = s->quant_precision,
78 .vop_fields.bits = {
79 .vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I,
80 .backward_reference_vop_coding_type =
81 s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
82 .vop_rounding_type = s->no_rounding,
83 .intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx),
84 .top_field_first = s->top_field_first,
85 .alternate_vertical_scan_flag = s->alternate_scan,
86 },
87 .vop_fcode_forward = s->f_code,
88 .vop_fcode_backward = s->b_code,
89 .vop_time_increment_resolution = avctx->framerate.num,
90 .num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height),
91 .num_gobs_in_vop =
92 (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
93 .TRB = s->pb_time,
94 .TRD = s->pp_time,
95 };
96
97 for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
98 pic_param.sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
99 pic_param.sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
100 }
101
102 if (s->pict_type == AV_PICTURE_TYPE_B)
103 pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
104 if (s->pict_type != AV_PICTURE_TYPE_I)
105 pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
106
107 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
108 VAPictureParameterBufferType,
109 &pic_param, sizeof(pic_param));
110 if (err < 0)
111 goto fail;
112
113 /* Only the first inverse quantisation method uses the weighting matrices */
114 if (pic_param.vol_fields.bits.quant_type) {
115 VAIQMatrixBufferMPEG4 iq_matrix;
116
117 iq_matrix.load_intra_quant_mat = 1;
118 iq_matrix.load_non_intra_quant_mat = 1;
119
120 for (i = 0; i < 64; i++) {
121 int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
122 iq_matrix.intra_quant_mat[i] = s->intra_matrix[n];
123 iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
124 }
125
126 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
127 VAIQMatrixBufferType,
128 &iq_matrix, sizeof(iq_matrix));
129 if (err < 0)
130 goto fail;
131 }
132 return 0;
133
134 fail:
135 ff_vaapi_decode_cancel(avctx, pic);
136 return err;
137 }
138
vaapi_mpeg4_end_frame(AVCodecContext * avctx)139 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
140 {
141 MpegEncContext *s = avctx->priv_data;
142 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
143 int ret;
144
145 ret = ff_vaapi_decode_issue(avctx, pic);
146 if (ret < 0)
147 goto fail;
148
149 ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
150
151 fail:
152 return ret;
153 }
154
vaapi_mpeg4_decode_slice(AVCodecContext * avctx,const uint8_t * buffer,uint32_t size)155 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
156 {
157 MpegEncContext *s = avctx->priv_data;
158 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
159 VASliceParameterBufferMPEG4 slice_param;
160 int err;
161
162 slice_param = (VASliceParameterBufferMPEG4) {
163 .slice_data_size = size,
164 .slice_data_offset = 0,
165 .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
166 .macroblock_offset = get_bits_count(&s->gb) % 8,
167 .macroblock_number = 0,
168 .quant_scale = s->qscale,
169 };
170
171 err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
172 &slice_param, sizeof(slice_param),
173 buffer, size);
174 if (err < 0) {
175 ff_vaapi_decode_cancel(avctx, pic);
176 return err;
177 }
178
179 return 0;
180 }
181
182 #if CONFIG_MPEG4_VAAPI_HWACCEL
183 const AVHWAccel ff_mpeg4_vaapi_hwaccel = {
184 .name = "mpeg4_vaapi",
185 .type = AVMEDIA_TYPE_VIDEO,
186 .id = AV_CODEC_ID_MPEG4,
187 .pix_fmt = AV_PIX_FMT_VAAPI,
188 .start_frame = &vaapi_mpeg4_start_frame,
189 .end_frame = &vaapi_mpeg4_end_frame,
190 .decode_slice = &vaapi_mpeg4_decode_slice,
191 .frame_priv_data_size = sizeof(VAAPIDecodePicture),
192 .init = &ff_vaapi_decode_init,
193 .uninit = &ff_vaapi_decode_uninit,
194 .frame_params = &ff_vaapi_common_frame_params,
195 .priv_data_size = sizeof(VAAPIDecodeContext),
196 .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
197 };
198 #endif
199
200 #if CONFIG_H263_VAAPI_HWACCEL
201 const AVHWAccel ff_h263_vaapi_hwaccel = {
202 .name = "h263_vaapi",
203 .type = AVMEDIA_TYPE_VIDEO,
204 .id = AV_CODEC_ID_H263,
205 .pix_fmt = AV_PIX_FMT_VAAPI,
206 .start_frame = &vaapi_mpeg4_start_frame,
207 .end_frame = &vaapi_mpeg4_end_frame,
208 .decode_slice = &vaapi_mpeg4_decode_slice,
209 .frame_priv_data_size = sizeof(VAAPIDecodePicture),
210 .init = &ff_vaapi_decode_init,
211 .uninit = &ff_vaapi_decode_uninit,
212 .frame_params = &ff_vaapi_common_frame_params,
213 .priv_data_size = sizeof(VAAPIDecodeContext),
214 .caps_internal = HWACCEL_CAP_ASYNC_SAFE,
215 };
216 #endif
217