FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg_er.c
Date: 2025-07-15 08:12:33
Exec Total Coverage
Lines: 64 70 91.4%
Functions: 4 4 100.0%
Branches: 9 12 75.0%
Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "libavutil/avassert.h"
20 #include "libavutil/mem.h"
21 #include "error_resilience.h"
22 #include "mpegvideo.h"
23 #include "mpegvideodec.h"
24 #include "mpeg_er.h"
25
26 33708 static void set_erpic(ERPicture *dst, const MPVPicture *src)
27 {
28 int i;
29
30 33708 memset(dst, 0, sizeof(*dst));
31
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 33708 if (!src)
32 314 return;
33
34 33394 dst->f = src->f;
35 33394 dst->progress = &src->progress;
36
37
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 100182 for (i = 0; i < 2; i++) {
38 66788 dst->motion_val[i] = src->motion_val[i];
39 66788 dst->ref_index[i] = src->ref_index[i];
40 }
41
42 33394 dst->mb_type = src->mb_type;
43 33394 dst->field_picture = src->field_picture;
44 }
45
46 11236 void ff_mpeg_er_frame_start(MpegEncContext *s)
47 {
48 11236 ERContext *er = &s->er;
49
50 11236 set_erpic(&er->cur_pic, s->cur_pic.ptr);
51 11236 set_erpic(&er->next_pic, s->next_pic.ptr);
52 11236 set_erpic(&er->last_pic, s->last_pic.ptr);
53
54 11236 er->quarter_sample = s->quarter_sample;
55
56 11236 ff_er_frame_start(er);
57 11236 }
58
59 59282 static void mpeg_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
60 int (*mv)[2][4][2], int mb_x, int mb_y,
61 int mb_intra, int mb_skipped)
62 {
63 59282 MpegEncContext *s = opaque;
64
65 av_assert1(!mb_intra);
66
67 59282 s->mv_dir = mv_dir;
68 59282 s->mv_type = mv_type;
69 59282 s->mb_intra = mb_intra;
70 59282 s->mb_skipped = mb_skipped;
71 59282 s->mb_x = mb_x;
72 59282 s->mb_y = mb_y;
73 59282 s->mcsel = 0;
74 59282 memcpy(s->mv, mv, sizeof(*mv));
75
76 // The following disables unquantizing and the IDCT.
77
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 770666 for (size_t i = 0; i < FF_ARRAY_ELEMS(s->block_last_index); i++)
78 711384 s->block_last_index[i] = -1;
79
80 59282 s->dest[0] = s->cur_pic.data[0] +
81 59282 s->mb_y * 16 * s->linesize +
82 59282 s->mb_x * 16;
83 59282 s->dest[1] = s->cur_pic.data[1] +
84 59282 s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize +
85 59282 s->mb_x * (16 >> s->chroma_x_shift);
86 59282 s->dest[2] = s->cur_pic.data[2] +
87 59282 s->mb_y * (16 >> s->chroma_y_shift) * s->uvlinesize +
88 59282 s->mb_x * (16 >> s->chroma_x_shift);
89
90
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 59282 if (ref)
91 ✗ av_log(s->avctx, AV_LOG_DEBUG,
92 "Interlaced error concealment is not fully implemented\n");
93 59282 ff_mpv_reconstruct_mb(s, NULL);
94 59282 }
95
96 643 av_cold int ff_mpeg_er_init(MpegEncContext *s)
97 {
98 643 ERContext *er = &s->er;
99 643 int mb_array_size = s->mb_height * s->mb_stride;
100
101 643 er->avctx = s->avctx;
102
103 643 er->mb_index2xy = s->mb_index2xy;
104 643 er->mb_num = s->mb_num;
105 643 er->mb_width = s->mb_width;
106 643 er->mb_height = s->mb_height;
107 643 er->mb_stride = s->mb_stride;
108 643 er->b8_stride = s->b8_stride;
109
110 643 er->dc_val[0] = s->dc_val;
111 643 er->dc_val[1] = er->dc_val[0] + s->b8_stride * 2 * s->buffer_pools.alloc_mb_height + s->mb_stride;
112 643 er->dc_val[2] = er->dc_val[1] + s->mb_stride * (s->buffer_pools.alloc_mb_height + 1);
113
114 643 er->er_temp_buffer = av_malloc(s->mb_height * s->mb_stride * (4*sizeof(int) + 1));
115 643 er->error_status_table = av_mallocz(mb_array_size);
116
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 643 if (!er->er_temp_buffer || !er->error_status_table)
117 ✗ goto fail;
118
119 643 er->mbskip_table = s->mbskip_table;
120 643 er->mbintra_table = s->mbintra_table;
121
122 643 er->decode_mb = mpeg_er_decode_mb;
123 643 er->opaque = s;
124
125 643 return 0;
126 ✗ fail:
127 ✗ av_freep(&er->er_temp_buffer);
128 ✗ av_freep(&er->error_status_table);
129 ✗ return AVERROR(ENOMEM);
130 }
131