2 * MPEG-4 / H.263 HW decode acceleration through VA API
4 * Copyright (C) 2008-2009 Splitted-Desktop Systems
6 * This file is part of Libav.
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.
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.
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
23 #include "vaapi_internal.h"
26 /** Reconstruct bitstream intra_dc_vlc_thr */
27 static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s)
29 switch (s->intra_dc_threshold) {
42 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
44 MpegEncContext * const s = avctx->priv_data;
45 struct vaapi_context * const vactx = avctx->hwaccel_context;
46 VAPictureParameterBufferMPEG4 *pic_param;
47 VAIQMatrixBufferMPEG4 *iq_matrix;
50 av_dlog(avctx, "vaapi_mpeg4_start_frame()\n");
52 vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
54 /* Fill in VAPictureParameterBufferMPEG4 */
55 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
58 pic_param->vop_width = s->width;
59 pic_param->vop_height = s->height;
60 pic_param->forward_reference_picture = VA_INVALID_ID;
61 pic_param->backward_reference_picture = VA_INVALID_ID;
62 pic_param->vol_fields.value = 0; /* reset all bits */
63 pic_param->vol_fields.bits.short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
64 pic_param->vol_fields.bits.chroma_format = CHROMA_420;
65 pic_param->vol_fields.bits.interlaced = !s->progressive_sequence;
66 pic_param->vol_fields.bits.obmc_disable = 1;
67 pic_param->vol_fields.bits.sprite_enable = s->vol_sprite_usage;
68 pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy;
69 pic_param->vol_fields.bits.quant_type = s->mpeg_quant;
70 pic_param->vol_fields.bits.quarter_sample = s->quarter_sample;
71 pic_param->vol_fields.bits.data_partitioned = s->data_partitioning;
72 pic_param->vol_fields.bits.reversible_vlc = s->rvlc;
73 pic_param->vol_fields.bits.resync_marker_disable = !s->resync_marker;
74 pic_param->no_of_sprite_warping_points = s->num_sprite_warping_points;
75 for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) {
76 pic_param->sprite_trajectory_du[i] = s->sprite_traj[i][0];
77 pic_param->sprite_trajectory_dv[i] = s->sprite_traj[i][1];
79 pic_param->quant_precision = s->quant_precision;
80 pic_param->vop_fields.value = 0; /* reset all bits */
81 pic_param->vop_fields.bits.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I;
82 pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f.pict_type - AV_PICTURE_TYPE_I : 0;
83 pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding;
84 pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(s);
85 pic_param->vop_fields.bits.top_field_first = s->top_field_first;
86 pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
87 pic_param->vop_fcode_forward = s->f_code;
88 pic_param->vop_fcode_backward = s->b_code;
89 pic_param->vop_time_increment_resolution = avctx->time_base.den;
90 pic_param->num_macroblocks_in_gob = s->mb_width * ff_h263_get_gob_height(s);
91 pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
92 pic_param->TRB = s->pb_time;
93 pic_param->TRD = s->pp_time;
95 if (s->pict_type == AV_PICTURE_TYPE_B)
96 pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture);
97 if (s->pict_type != AV_PICTURE_TYPE_I)
98 pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture);
100 /* Fill in VAIQMatrixBufferMPEG4 */
101 /* Only the first inverse quantisation method uses the weighting matrices */
102 if (pic_param->vol_fields.bits.quant_type) {
103 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
106 iq_matrix->load_intra_quant_mat = 1;
107 iq_matrix->load_non_intra_quant_mat = 1;
109 for (i = 0; i < 64; i++) {
110 int n = s->dsp.idct_permutation[ff_zigzag_direct[i]];
111 iq_matrix->intra_quant_mat[i] = s->intra_matrix[n];
112 iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n];
118 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
120 MpegEncContext * const s = avctx->priv_data;
121 VASliceParameterBufferMPEG4 *slice_param;
123 av_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
125 /* video_plane_with_short_video_header() contains all GOBs
126 * in-order, and this is what VA API (Intel backend) expects: only
127 * a single slice param. So fake macroblock_number for Libav so
128 * that we don't call vaapi_mpeg4_decode_slice() again
130 if (avctx->codec->id == AV_CODEC_ID_H263)
131 size = s->gb.buffer_end - buffer;
133 /* Fill in VASliceParameterBufferMPEG4 */
134 slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
137 slice_param->macroblock_offset = get_bits_count(&s->gb) % 8;
138 slice_param->macroblock_number = s->mb_y * s->mb_width + s->mb_x;
139 slice_param->quant_scale = s->qscale;
141 if (avctx->codec->id == AV_CODEC_ID_H263)
142 s->mb_y = s->mb_height;
147 #if CONFIG_MPEG4_VAAPI_HWACCEL
148 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
149 .name = "mpeg4_vaapi",
150 .type = AVMEDIA_TYPE_VIDEO,
151 .id = AV_CODEC_ID_MPEG4,
152 .pix_fmt = AV_PIX_FMT_VAAPI_VLD,
153 .start_frame = vaapi_mpeg4_start_frame,
154 .end_frame = ff_vaapi_mpeg_end_frame,
155 .decode_slice = vaapi_mpeg4_decode_slice,
159 #if CONFIG_H263_VAAPI_HWACCEL
160 AVHWAccel ff_h263_vaapi_hwaccel = {
161 .name = "h263_vaapi",
162 .type = AVMEDIA_TYPE_VIDEO,
163 .id = AV_CODEC_ID_H263,
164 .pix_fmt = AV_PIX_FMT_VAAPI_VLD,
165 .start_frame = vaapi_mpeg4_start_frame,
166 .end_frame = ff_vaapi_mpeg_end_frame,
167 .decode_slice = vaapi_mpeg4_decode_slice,