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 FFmpeg.
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.
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.
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
23 #include "vaapi_internal.h"
26 #include "mpeg4video.h"
27 #include "mpegvideo.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 * const s = &ctx->m;
49 FFVAContext * const vactx = ff_vaapi_get_context(avctx);
50 VAPictureParameterBufferMPEG4 *pic_param;
51 VAIQMatrixBufferMPEG4 *iq_matrix;
54 ff_dlog(avctx, "vaapi_mpeg4_start_frame()\n");
56 vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
58 /* Fill in VAPictureParameterBufferMPEG4 */
59 pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
62 pic_param->vop_width = s->width;
63 pic_param->vop_height = s->height;
64 pic_param->forward_reference_picture = VA_INVALID_ID;
65 pic_param->backward_reference_picture = VA_INVALID_ID;
66 pic_param->vol_fields.value = 0; /* reset all bits */
67 pic_param->vol_fields.bits.short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
68 pic_param->vol_fields.bits.chroma_format = CHROMA_420;
69 pic_param->vol_fields.bits.interlaced = !s->progressive_sequence;
70 pic_param->vol_fields.bits.obmc_disable = 1;
71 pic_param->vol_fields.bits.sprite_enable = ctx->vol_sprite_usage;
72 pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy;
73 pic_param->vol_fields.bits.quant_type = s->mpeg_quant;
74 pic_param->vol_fields.bits.quarter_sample = s->quarter_sample;
75 pic_param->vol_fields.bits.data_partitioned = s->data_partitioning;
76 pic_param->vol_fields.bits.reversible_vlc = ctx->rvlc;
77 pic_param->vol_fields.bits.resync_marker_disable = !ctx->resync_marker;
78 pic_param->no_of_sprite_warping_points = ctx->num_sprite_warping_points;
79 for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
80 pic_param->sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
81 pic_param->sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
83 pic_param->quant_precision = s->quant_precision;
84 pic_param->vop_fields.value = 0; /* reset all bits */
85 pic_param->vop_fields.bits.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I;
86 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;
87 pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding;
88 pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx);
89 pic_param->vop_fields.bits.top_field_first = s->top_field_first;
90 pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
91 pic_param->vop_fcode_forward = s->f_code;
92 pic_param->vop_fcode_backward = s->b_code;
93 pic_param->vop_time_increment_resolution = avctx->framerate.num;
94 pic_param->num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height);
95 pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
96 pic_param->TRB = s->pb_time;
97 pic_param->TRD = s->pp_time;
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 /* Fill in VAIQMatrixBufferMPEG4 */
105 /* Only the first inverse quantisation method uses the weighting matrices */
106 if (pic_param->vol_fields.bits.quant_type) {
107 iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
110 iq_matrix->load_intra_quant_mat = 1;
111 iq_matrix->load_non_intra_quant_mat = 1;
113 for (i = 0; i < 64; i++) {
114 int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
115 iq_matrix->intra_quant_mat[i] = s->intra_matrix[n];
116 iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n];
122 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
124 MpegEncContext * const s = avctx->priv_data;
125 FFVAContext * const vactx = ff_vaapi_get_context(avctx);
126 VASliceParameterBufferMPEG4 *slice_param;
128 ff_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
130 /* Fill in VASliceParameterBufferMPEG4 */
131 slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(vactx, buffer, size);
134 slice_param->macroblock_offset = get_bits_count(&s->gb) % 8;
135 slice_param->macroblock_number = 0;
136 slice_param->quant_scale = s->qscale;
141 #if CONFIG_MPEG4_VAAPI_HWACCEL
142 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
143 .name = "mpeg4_vaapi",
144 .type = AVMEDIA_TYPE_VIDEO,
145 .id = AV_CODEC_ID_MPEG4,
146 .pix_fmt = AV_PIX_FMT_VAAPI,
147 .start_frame = vaapi_mpeg4_start_frame,
148 .end_frame = ff_vaapi_mpeg_end_frame,
149 .decode_slice = vaapi_mpeg4_decode_slice,
150 .init = ff_vaapi_context_init,
151 .uninit = ff_vaapi_context_fini,
152 .priv_data_size = sizeof(FFVAContext),
156 #if CONFIG_H263_VAAPI_HWACCEL
157 AVHWAccel ff_h263_vaapi_hwaccel = {
158 .name = "h263_vaapi",
159 .type = AVMEDIA_TYPE_VIDEO,
160 .id = AV_CODEC_ID_H263,
161 .pix_fmt = AV_PIX_FMT_VAAPI,
162 .start_frame = vaapi_mpeg4_start_frame,
163 .end_frame = ff_vaapi_mpeg_end_frame,
164 .decode_slice = vaapi_mpeg4_decode_slice,
165 .init = ff_vaapi_context_init,
166 .uninit = ff_vaapi_context_fini,
167 .priv_data_size = sizeof(FFVAContext),