GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/vaapi_mpeg2.c Lines: 0 81 0.0 %
Date: 2020-10-23 17:01:47 Branches: 0 23 0.0 %

Line Branch Exec Source
1
/*
2
 * MPEG-2 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 "hwconfig.h"
24
#include "mpegutils.h"
25
#include "mpegvideo.h"
26
#include "internal.h"
27
#include "vaapi_decode.h"
28
29
/** Reconstruct bitstream f_code */
30
static inline int mpeg2_get_f_code(const MpegEncContext *s)
31
{
32
    return (s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
33
           (s->mpeg_f_code[1][0] <<  4) |  s->mpeg_f_code[1][1];
34
}
35
36
/** Determine frame start: first field for field picture or frame picture */
37
static inline int mpeg2_get_is_frame_start(const MpegEncContext *s)
38
{
39
    return s->first_field || s->picture_structure == PICT_FRAME;
40
}
41
42
static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
43
{
44
    const MpegEncContext *s = avctx->priv_data;
45
    VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
46
    VAPictureParameterBufferMPEG2 pic_param;
47
    VAIQMatrixBufferMPEG2 iq_matrix;
48
    int i, err;
49
50
    pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
51
52
    pic_param = (VAPictureParameterBufferMPEG2) {
53
        .horizontal_size                 = s->width,
54
        .vertical_size                   = s->height,
55
        .forward_reference_picture       = VA_INVALID_ID,
56
        .backward_reference_picture      = VA_INVALID_ID,
57
        .picture_coding_type             = s->pict_type,
58
        .f_code                          = mpeg2_get_f_code(s),
59
        .picture_coding_extension.bits = {
60
            .intra_dc_precision          = s->intra_dc_precision,
61
            .picture_structure           = s->picture_structure,
62
            .top_field_first             = s->top_field_first,
63
            .frame_pred_frame_dct        = s->frame_pred_frame_dct,
64
            .concealment_motion_vectors  = s->concealment_motion_vectors,
65
            .q_scale_type                = s->q_scale_type,
66
            .intra_vlc_format            = s->intra_vlc_format,
67
            .alternate_scan              = s->alternate_scan,
68
            .repeat_first_field          = s->repeat_first_field,
69
            .progressive_frame           = s->progressive_frame,
70
            .is_first_field              = mpeg2_get_is_frame_start(s),
71
        },
72
    };
73
74
    switch (s->pict_type) {
75
    case AV_PICTURE_TYPE_B:
76
        pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
77
        // fall-through
78
    case AV_PICTURE_TYPE_P:
79
        pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
80
        break;
81
    }
82
83
    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
84
                                            VAPictureParameterBufferType,
85
                                            &pic_param, sizeof(pic_param));
86
    if (err < 0)
87
        goto fail;
88
89
    iq_matrix.load_intra_quantiser_matrix              = 1;
90
    iq_matrix.load_non_intra_quantiser_matrix          = 1;
91
    iq_matrix.load_chroma_intra_quantiser_matrix       = 1;
92
    iq_matrix.load_chroma_non_intra_quantiser_matrix   = 1;
93
94
    for (i = 0; i < 64; i++) {
95
        int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
96
        iq_matrix.intra_quantiser_matrix[i]            = s->intra_matrix[n];
97
        iq_matrix.non_intra_quantiser_matrix[i]        = s->inter_matrix[n];
98
        iq_matrix.chroma_intra_quantiser_matrix[i]     = s->chroma_intra_matrix[n];
99
        iq_matrix.chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
100
    }
101
102
    err = ff_vaapi_decode_make_param_buffer(avctx, pic,
103
                                            VAIQMatrixBufferType,
104
                                            &iq_matrix, sizeof(iq_matrix));
105
    if (err < 0)
106
        goto fail;
107
108
    return 0;
109
110
fail:
111
    ff_vaapi_decode_cancel(avctx, pic);
112
    return err;
113
}
114
115
static int vaapi_mpeg2_end_frame(AVCodecContext *avctx)
116
{
117
    MpegEncContext     *s   = avctx->priv_data;
118
    VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
119
    int ret;
120
121
    ret = ff_vaapi_decode_issue(avctx, pic);
122
    if (ret < 0)
123
        goto fail;
124
125
    ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
126
127
fail:
128
    return ret;
129
}
130
131
static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
132
{
133
    const MpegEncContext *s = avctx->priv_data;
134
    VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
135
    VASliceParameterBufferMPEG2 slice_param;
136
    GetBitContext gb;
137
    uint32_t quantiser_scale_code, intra_slice_flag, macroblock_offset;
138
    int err;
139
140
    /* Determine macroblock_offset */
141
    init_get_bits(&gb, buffer, 8 * size);
142
    if (get_bits_long(&gb, 32) >> 8 != 1) /* start code */
143
        return AVERROR_INVALIDDATA;
144
    quantiser_scale_code = get_bits(&gb, 5);
145
    intra_slice_flag = get_bits1(&gb);
146
    if (intra_slice_flag) {
147
        skip_bits(&gb, 8);
148
        if (skip_1stop_8data_bits(&gb) < 0)
149
            return AVERROR_INVALIDDATA;
150
    }
151
    macroblock_offset = get_bits_count(&gb);
152
153
    slice_param = (VASliceParameterBufferMPEG2) {
154
        .slice_data_size            = size,
155
        .slice_data_offset          = 0,
156
        .slice_data_flag            = VA_SLICE_DATA_FLAG_ALL,
157
        .macroblock_offset          = macroblock_offset,
158
        .slice_horizontal_position  = s->mb_x,
159
        .slice_vertical_position    = s->mb_y >> (s->picture_structure != PICT_FRAME),
160
        .quantiser_scale_code       = quantiser_scale_code,
161
        .intra_slice_flag           = intra_slice_flag,
162
    };
163
164
    err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
165
                                            &slice_param, sizeof(slice_param),
166
                                            buffer, size);
167
    if (err < 0) {
168
        ff_vaapi_decode_cancel(avctx, pic);
169
        return err;
170
    }
171
172
    return 0;
173
}
174
175
const AVHWAccel ff_mpeg2_vaapi_hwaccel = {
176
    .name                 = "mpeg2_vaapi",
177
    .type                 = AVMEDIA_TYPE_VIDEO,
178
    .id                   = AV_CODEC_ID_MPEG2VIDEO,
179
    .pix_fmt              = AV_PIX_FMT_VAAPI,
180
    .start_frame          = &vaapi_mpeg2_start_frame,
181
    .end_frame            = &vaapi_mpeg2_end_frame,
182
    .decode_slice         = &vaapi_mpeg2_decode_slice,
183
    .frame_priv_data_size = sizeof(VAAPIDecodePicture),
184
    .init                 = &ff_vaapi_decode_init,
185
    .uninit               = &ff_vaapi_decode_uninit,
186
    .frame_params         = &ff_vaapi_common_frame_params,
187
    .priv_data_size       = sizeof(VAAPIDecodeContext),
188
    .caps_internal        = HWACCEL_CAP_ASYNC_SAFE,
189
};