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chromium / chromium / third_party / ffmpeg / b4df97365f3ccd23409f4c88acd373c71e4074f6 / . / libavcodec / vaapi_mpeg4.c
blob: ab9355f3541c10845141cf941c85ea1e809c5479 [file] [log] [blame]
Gwenole Beauchesneb4df9732009-04-02 07:30:04[diff] [blame^]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 "vaapi_internal.h"
24
25/** Reconstruct bitstream intra_dc_vlc_thr */
26static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s)
27{
28 switch (s->intra_dc_threshold) {
29 case 99: return 0;
30 case 13: return 1;
31 case 15: return 2;
32 case 17: return 3;
33 case 19: return 4;
34 case 21: return 5;
35 case 23: return 6;
36 case 0: return 7;
37 }
38 return 0;
39}
40
41static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
42{
43 MpegEncContext * const s = avctx->priv_data;
44 struct vaapi_context * const vactx = avctx->hwaccel_context;
45 VAPictureParameterBufferMPEG4 *pic_param;
46 VAIQMatrixBufferMPEG4 *iq_matrix;
47 int i;
48
49 dprintf(avctx, "vaapi_mpeg4_start_frame()\n");
50
51 vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
52
53 /* Fill in VAPictureParameterBufferMPEG4 */
54 pic_param = ff_vaapi_alloc_picture(vactx, sizeof(VAPictureParameterBufferMPEG4));
55 if (!pic_param)
56 return -1;
57 pic_param->vop_width = s->width;
58 pic_param->vop_height = s->height;
59 pic_param->forward_reference_picture = 0xffffffff;
60 pic_param->backward_reference_picture = 0xffffffff;
61 pic_param->vol_fields.value = 0; /* reset all bits */
62 pic_param->vol_fields.bits.short_video_header = avctx->codec->id == CODEC_ID_H263;
63 pic_param->vol_fields.bits.chroma_format = CHROMA_420;
64 pic_param->vol_fields.bits.interlaced = !s->progressive_sequence;
65 pic_param->vol_fields.bits.obmc_disable = 1;
66 pic_param->vol_fields.bits.sprite_enable = s->vol_sprite_usage;
67 pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy;
68 pic_param->vol_fields.bits.quant_type = s->mpeg_quant;
69 pic_param->vol_fields.bits.quarter_sample = s->quarter_sample;
70 pic_param->vol_fields.bits.data_partitioned = s->data_partitioning;
71 pic_param->vol_fields.bits.reversible_vlc = s->rvlc;
72 pic_param->no_of_sprite_warping_points = s->num_sprite_warping_points;
73 for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) {
74 pic_param->sprite_trajectory_du[i] = s->sprite_traj[i][0];
75 pic_param->sprite_trajectory_dv[i] = s->sprite_traj[i][1];
76 }
77 pic_param->quant_precision = s->quant_precision;
78 pic_param->vop_fields.value = 0; /* reset all bits */
79 pic_param->vop_fields.bits.vop_coding_type = s->pict_type - FF_I_TYPE;
80 pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == FF_B_TYPE ? s->next_picture.pict_type - FF_I_TYPE : 0;
81 pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding;
82 pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(s);
83 pic_param->vop_fields.bits.top_field_first = s->top_field_first;
84 pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
85 pic_param->vop_fcode_forward = s->f_code;
86 pic_param->vop_fcode_backward = s->b_code;
87 pic_param->num_macroblocks_in_gob = s->mb_width * ff_h263_get_gob_height(s);
88 pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
89 pic_param->TRB = s->pb_time;
90 pic_param->TRD = s->pp_time;
91
92 if (s->pict_type == FF_B_TYPE)
93 pic_param->backward_reference_picture = ff_vaapi_get_surface(&s->next_picture);
94 if (s->pict_type != FF_I_TYPE)
95 pic_param->forward_reference_picture = ff_vaapi_get_surface(&s->last_picture);
96
97 /* Fill in VAIQMatrixBufferMPEG4 */
98 /* Only the first inverse quantisation method uses the weighthing matrices */
99 if (pic_param->vol_fields.bits.quant_type) {
100 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
101 if (!iq_matrix)
102 return -1;
103 iq_matrix->load_intra_quant_mat = 1;
104 iq_matrix->load_non_intra_quant_mat = 1;
105
106 for (i = 0; i < 64; i++) {
107 int n = s->dsp.idct_permutation[ff_zigzag_direct[i]];
108 iq_matrix->intra_quant_mat[i] = s->intra_matrix[n];
109 iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n];
110 }
111 }
112 return 0;
113}
114
115static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
116{
117 return ff_vaapi_common_end_frame(avctx->priv_data);
118}
119
120static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
121{
122 MpegEncContext * const s = avctx->priv_data;
123 VASliceParameterBufferMPEG4 *slice_param;
124
125 dprintf(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
126
127 /* video_plane_with_short_video_header() contains all GOBs
128 * in-order, and this is what VA API (Intel backend) expects: only
129 * a single slice param. So fake macroblock_number for FFmpeg so
130 * that we don't call vaapi_mpeg4_decode_slice() again
131 */
132 if (avctx->codec->id == CODEC_ID_H263)
133 size = s->gb.buffer_end - buffer;
134
135 /* Fill in VASliceParameterBufferMPEG4 */
136 slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
137 if (!slice_param)
138 return -1;
139 slice_param->macroblock_offset = get_bits_count(&s->gb) % 8;
140 slice_param->macroblock_number = s->mb_y * s->mb_width + s->mb_x;
141 slice_param->quant_scale = s->qscale;
142
143 if (avctx->codec->id == CODEC_ID_H263)
144 s->mb_y = s->mb_height;
145
146 return 0;
147}
148
149#if CONFIG_MPEG4_VAAPI_HWACCEL
150AVHWAccel mpeg4_vaapi_hwaccel = {
151 .name = "mpeg4_vaapi",
152 .type = CODEC_TYPE_VIDEO,
153 .id = CODEC_ID_MPEG4,
154 .pix_fmt = PIX_FMT_VAAPI_VLD,
155 .capabilities = 0,
156 .start_frame = vaapi_mpeg4_start_frame,
157 .end_frame = vaapi_mpeg4_end_frame,
158 .decode_slice = vaapi_mpeg4_decode_slice,
159 .priv_data_size = 0,
160};
161#endif
162
163#if CONFIG_H263_VAAPI_HWACCEL
164AVHWAccel h263_vaapi_hwaccel = {
165 .name = "h263_vaapi",
166 .type = CODEC_TYPE_VIDEO,
167 .id = CODEC_ID_H263,
168 .pix_fmt = PIX_FMT_VAAPI_VLD,
169 .capabilities = 0,
170 .start_frame = vaapi_mpeg4_start_frame,
171 .end_frame = vaapi_mpeg4_end_frame,
172 .decode_slice = vaapi_mpeg4_decode_slice,
173 .priv_data_size = 0,
174};
175#endif