FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dcadec.h
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 8 14 57.1%
Branches: 3 16 18.8%

Line Branch Exec Source
1 /*
2 * Copyright (C) 2016 foo86
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVCODEC_DCADEC_H
22 #define AVCODEC_DCADEC_H
23
24 #include "libavutil/common.h"
25 #include "libavutil/crc.h"
26 #include "libavutil/float_dsp.h"
27
28 #include "avcodec.h"
29 #include "get_bits.h"
30 #include "dca.h"
31 #include "dcadsp.h"
32 #include "dca_core.h"
33 #include "dca_exss.h"
34 #include "dca_xll.h"
35 #include "dca_lbr.h"
36
37 #define DCA_PACKET_CORE 0x01
38 #define DCA_PACKET_EXSS 0x02
39 #define DCA_PACKET_XLL 0x04
40 #define DCA_PACKET_LBR 0x08
41 #define DCA_PACKET_MASK 0x0f
42
43 #define DCA_PACKET_RECOVERY 0x10 ///< Sync error recovery flag
44 #define DCA_PACKET_RESIDUAL 0x20 ///< Core valid for residual decoding
45
46 typedef struct DCAContext {
47 const AVClass *class; ///< class for AVOptions
48 AVCodecContext *avctx;
49
50 DCACoreDecoder core; ///< Core decoder context
51 DCAExssParser exss; ///< EXSS parser context
52 DCAXllDecoder xll; ///< XLL decoder context
53 DCALbrDecoder lbr; ///< LBR decoder context
54
55 DCADSPContext dcadsp;
56
57 const AVCRC *crctab;
58
59 uint8_t *buffer; ///< Packet buffer
60 unsigned int buffer_size;
61
62 int packet; ///< Packet flags
63
64 int request_channel_layout; ///< Converted from avctx.request_channel_layout
65 int core_only; ///< Core only decoding flag
66 } DCAContext;
67
68 int ff_dca_set_channel_layout(AVCodecContext *avctx, int *ch_remap, int dca_mask);
69
70 void ff_dca_downmix_to_stereo_fixed(DCADSPContext *dcadsp, int32_t **samples,
71 int *coeff_l, int nsamples, int ch_mask);
72 void ff_dca_downmix_to_stereo_float(AVFloatDSPContext *fdsp, float **samples,
73 int *coeff_l, int nsamples, int ch_mask);
74
75 6982 static inline int ff_dca_check_crc(AVCodecContext *avctx, GetBitContext *s,
76 int p1, int p2)
77 {
78 6982 DCAContext *dca = avctx->priv_data;
79
80
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6982 if (!(avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_CAREFUL)))
81 6982 return 0;
82 if (((p1 | p2) & 7) || p1 < 0 || p2 > s->size_in_bits || p2 - p1 < 16)
83 return -1;
84 if (av_crc(dca->crctab, 0xffff, s->buffer + p1 / 8, (p2 - p1) / 8))
85 return -1;
86 return 0;
87 }
88
89 19492 static inline int ff_dca_seek_bits(GetBitContext *s, int p)
90 {
91
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19492 if (p < get_bits_count(s) || p > s->size_in_bits)
92 return -1;
93 19492 skip_bits_long(s, p - get_bits_count(s));
94 19492 return 0;
95 }
96
97 #endif
98