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
25 #include "mpeg4video.h"
26 #include "mpegvideo.h"
27 #include "vaapi_decode.h"
29 /** Reconstruct bitstream intra_dc_vlc_thr */
30 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
32 switch (s->intra_dc_threshold) {
45 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
47 Mpeg4DecContext *ctx = avctx->priv_data;
48 MpegEncContext *s = &ctx->m;
49 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
50 VAPictureParameterBufferMPEG4 pic_param;
53 pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
55 pic_param = (VAPictureParameterBufferMPEG4) {
56 .vop_width = s->width,
57 .vop_height = s->height,
58 .forward_reference_picture = VA_INVALID_ID,
59 .backward_reference_picture = VA_INVALID_ID,
61 .short_video_header = avctx->codec->id == AV_CODEC_ID_H263,
62 .chroma_format = CHROMA_420,
63 .interlaced = !s->progressive_sequence,
65 .sprite_enable = ctx->vol_sprite_usage,
66 .sprite_warping_accuracy = s->sprite_warping_accuracy,
67 .quant_type = s->mpeg_quant,
68 .quarter_sample = s->quarter_sample,
69 .data_partitioned = s->data_partitioning,
70 .reversible_vlc = ctx->rvlc,
71 .resync_marker_disable = !ctx->resync_marker,
73 .no_of_sprite_warping_points = ctx->num_sprite_warping_points,
74 .quant_precision = s->quant_precision,
76 .vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I,
77 .backward_reference_vop_coding_type =
78 s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
79 .vop_rounding_type = s->no_rounding,
80 .intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx),
81 .top_field_first = s->top_field_first,
82 .alternate_vertical_scan_flag = s->alternate_scan,
84 .vop_fcode_forward = s->f_code,
85 .vop_fcode_backward = s->b_code,
86 .vop_time_increment_resolution = avctx->framerate.num,
87 .num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height),
89 (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
94 for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
95 pic_param.sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
96 pic_param.sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
99 if (s->pict_type == AV_PICTURE_TYPE_B)
100 pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
101 if (s->pict_type != AV_PICTURE_TYPE_I)
102 pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
104 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
105 VAPictureParameterBufferType,
106 &pic_param, sizeof(pic_param));
110 /* Only the first inverse quantisation method uses the weighting matrices */
111 if (pic_param.vol_fields.bits.quant_type) {
112 VAIQMatrixBufferMPEG4 iq_matrix;
114 iq_matrix.load_intra_quant_mat = 1;
115 iq_matrix.load_non_intra_quant_mat = 1;
117 for (i = 0; i < 64; i++) {
118 int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
119 iq_matrix.intra_quant_mat[i] = s->intra_matrix[n];
120 iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
123 err = ff_vaapi_decode_make_param_buffer(avctx, pic,
124 VAIQMatrixBufferType,
125 &iq_matrix, sizeof(iq_matrix));
132 ff_vaapi_decode_cancel(avctx, pic);
136 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
138 MpegEncContext *s = avctx->priv_data;
139 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
142 ret = ff_vaapi_decode_issue(avctx, pic);
146 ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
152 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
154 MpegEncContext *s = avctx->priv_data;
155 VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
156 VASliceParameterBufferMPEG4 slice_param;
159 /* video_plane_with_short_video_header() contains all GOBs
160 * in-order, and this is what VA API (Intel backend) expects: only
161 * a single slice param. So fake macroblock_number for Libav so
162 * that we don't call vaapi_mpeg4_decode_slice() again
164 if (avctx->codec->id == AV_CODEC_ID_H263)
165 size = s->gb.buffer_end - buffer;
167 slice_param = (VASliceParameterBufferMPEG4) {
168 .slice_data_size = size,
169 .slice_data_offset = 0,
170 .slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
171 .macroblock_offset = get_bits_count(&s->gb) % 8,
172 .macroblock_number = s->mb_y * s->mb_width + s->mb_x,
173 .quant_scale = s->qscale,
176 if (avctx->codec->id == AV_CODEC_ID_H263)
177 s->mb_y = s->mb_height;
179 err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
180 &slice_param, sizeof(slice_param),
183 ff_vaapi_decode_cancel(avctx, pic);
190 #if CONFIG_MPEG4_VAAPI_HWACCEL
191 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
192 .name = "mpeg4_vaapi",
193 .type = AVMEDIA_TYPE_VIDEO,
194 .id = AV_CODEC_ID_MPEG4,
195 .pix_fmt = AV_PIX_FMT_VAAPI,
196 .start_frame = &vaapi_mpeg4_start_frame,
197 .end_frame = &vaapi_mpeg4_end_frame,
198 .decode_slice = &vaapi_mpeg4_decode_slice,
199 .frame_priv_data_size = sizeof(VAAPIDecodePicture),
200 .init = &ff_vaapi_decode_init,
201 .uninit = &ff_vaapi_decode_uninit,
202 .priv_data_size = sizeof(VAAPIDecodeContext),
206 #if CONFIG_H263_VAAPI_HWACCEL
207 AVHWAccel ff_h263_vaapi_hwaccel = {
208 .name = "h263_vaapi",
209 .type = AVMEDIA_TYPE_VIDEO,
210 .id = AV_CODEC_ID_H263,
211 .pix_fmt = AV_PIX_FMT_VAAPI,
212 .start_frame = &vaapi_mpeg4_start_frame,
213 .end_frame = &vaapi_mpeg4_end_frame,
214 .decode_slice = &vaapi_mpeg4_decode_slice,
215 .frame_priv_data_size = sizeof(VAAPIDecodePicture),
216 .init = &ff_vaapi_decode_init,
217 .uninit = &ff_vaapi_decode_uninit,
218 .priv_data_size = sizeof(VAAPIDecodeContext),