b00f73dce1ce87d94f7603780cd8a10f4e43836a
[ffmpeg.git] / libavcodec / vaapi_mpeg4.c
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 "h263.h"
24 #include "internal.h"
25 #include "mpeg4video.h"
26 #include "mpegvideo.h"
27 #include "vaapi_decode.h"
28
29 /** Reconstruct bitstream intra_dc_vlc_thr */
30 static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
31 {
32     switch (s->intra_dc_threshold) {
33     case 99: return 0;
34     case 13: return 1;
35     case 15: return 2;
36     case 17: return 3;
37     case 19: return 4;
38     case 21: return 5;
39     case 23: return 6;
40     case 0:  return 7;
41     }
42     return 0;
43 }
44
45 static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
46 {
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;
51     int i, err;
52
53     pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
54
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,
60         .vol_fields.bits = {
61             .short_video_header           = avctx->codec->id == AV_CODEC_ID_H263,
62             .chroma_format                = CHROMA_420,
63             .interlaced                   = !s->progressive_sequence,
64             .obmc_disable                 = 1,
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,
72         },
73         .no_of_sprite_warping_points      = ctx->num_sprite_warping_points,
74         .quant_precision                  = s->quant_precision,
75         .vop_fields.bits = {
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,
83         },
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),
88         .num_gobs_in_vop                  =
89             (s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
90         .TRB                              = s->pb_time,
91         .TRD                              = s->pp_time,
92     };
93
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];
97     }
98
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);
103
104     err = ff_vaapi_decode_make_param_buffer(avctx, pic,
105                                             VAPictureParameterBufferType,
106                                             &pic_param, sizeof(pic_param));
107     if (err < 0)
108         goto fail;
109
110     /* Only the first inverse quantisation method uses the weighting matrices */
111     if (pic_param.vol_fields.bits.quant_type) {
112         VAIQMatrixBufferMPEG4 iq_matrix;
113
114         iq_matrix.load_intra_quant_mat     = 1;
115         iq_matrix.load_non_intra_quant_mat = 1;
116
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];
121         }
122
123         err = ff_vaapi_decode_make_param_buffer(avctx, pic,
124                                                 VAIQMatrixBufferType,
125                                                 &iq_matrix, sizeof(iq_matrix));
126         if (err < 0)
127             goto fail;
128     }
129     return 0;
130
131 fail:
132     ff_vaapi_decode_cancel(avctx, pic);
133     return err;
134 }
135
136 static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
137 {
138     MpegEncContext *s = avctx->priv_data;
139     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
140     int ret;
141
142     ret = ff_vaapi_decode_issue(avctx, pic);
143     if (ret < 0)
144         goto fail;
145
146     ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
147
148 fail:
149     return ret;
150 }
151
152 static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
153 {
154     MpegEncContext *s = avctx->priv_data;
155     VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
156     VASliceParameterBufferMPEG4 slice_param;
157     int err;
158
159     slice_param = (VASliceParameterBufferMPEG4) {
160         .slice_data_size   = size,
161         .slice_data_offset = 0,
162         .slice_data_flag   = VA_SLICE_DATA_FLAG_ALL,
163         .macroblock_offset = get_bits_count(&s->gb) % 8,
164         .macroblock_number = 0,
165         .quant_scale       = s->qscale,
166     };
167
168     err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
169                                             &slice_param, sizeof(slice_param),
170                                             buffer, size);
171     if (err < 0) {
172         ff_vaapi_decode_cancel(avctx, pic);
173         return err;
174     }
175
176     return 0;
177 }
178
179 #if CONFIG_MPEG4_VAAPI_HWACCEL
180 AVHWAccel ff_mpeg4_vaapi_hwaccel = {
181     .name                 = "mpeg4_vaapi",
182     .type                 = AVMEDIA_TYPE_VIDEO,
183     .id                   = AV_CODEC_ID_MPEG4,
184     .pix_fmt              = AV_PIX_FMT_VAAPI,
185     .start_frame          = &vaapi_mpeg4_start_frame,
186     .end_frame            = &vaapi_mpeg4_end_frame,
187     .decode_slice         = &vaapi_mpeg4_decode_slice,
188     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
189     .init                 = &ff_vaapi_decode_init,
190     .uninit               = &ff_vaapi_decode_uninit,
191     .priv_data_size       = sizeof(VAAPIDecodeContext),
192 };
193 #endif
194
195 #if CONFIG_H263_VAAPI_HWACCEL
196 AVHWAccel ff_h263_vaapi_hwaccel = {
197     .name                 = "h263_vaapi",
198     .type                 = AVMEDIA_TYPE_VIDEO,
199     .id                   = AV_CODEC_ID_H263,
200     .pix_fmt              = AV_PIX_FMT_VAAPI,
201     .start_frame          = &vaapi_mpeg4_start_frame,
202     .end_frame            = &vaapi_mpeg4_end_frame,
203     .decode_slice         = &vaapi_mpeg4_decode_slice,
204     .frame_priv_data_size = sizeof(VAAPIDecodePicture),
205     .init                 = &ff_vaapi_decode_init,
206     .uninit               = &ff_vaapi_decode_uninit,
207     .priv_data_size       = sizeof(VAAPIDecodeContext),
208 };
209 #endif