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 */
33static 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
48static 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
134fail:
135    ff_vaapi_decode_cancel(avctx, pic);
136    return err;
137}
138
139static 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
151fail:
152    return ret;
153}
154
155static 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
183const 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
201const 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