blob: 2fc3f6da67b2f5cf185d235c203a46fb1187ccfd
1 | /* |
2 | * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com> |
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 AVRESAMPLE_INTERNAL_H |
22 | #define AVRESAMPLE_INTERNAL_H |
23 | |
24 | #include "libavutil/audio_fifo.h" |
25 | #include "libavutil/log.h" |
26 | #include "libavutil/opt.h" |
27 | #include "libavutil/samplefmt.h" |
28 | #include "avresample.h" |
29 | |
30 | typedef struct AudioData AudioData; |
31 | typedef struct AudioConvert AudioConvert; |
32 | typedef struct AudioMix AudioMix; |
33 | typedef struct ResampleContext ResampleContext; |
34 | |
35 | enum RemapPoint { |
36 | REMAP_NONE, |
37 | REMAP_IN_COPY, |
38 | REMAP_IN_CONVERT, |
39 | REMAP_OUT_COPY, |
40 | REMAP_OUT_CONVERT, |
41 | }; |
42 | |
43 | typedef struct ChannelMapInfo { |
44 | int channel_map[AVRESAMPLE_MAX_CHANNELS]; /**< source index of each output channel, -1 if not remapped */ |
45 | int do_remap; /**< remap needed */ |
46 | int channel_copy[AVRESAMPLE_MAX_CHANNELS]; /**< dest index to copy from */ |
47 | int do_copy; /**< copy needed */ |
48 | int channel_zero[AVRESAMPLE_MAX_CHANNELS]; /**< dest index to zero */ |
49 | int do_zero; /**< zeroing needed */ |
50 | int input_map[AVRESAMPLE_MAX_CHANNELS]; /**< dest index of each input channel */ |
51 | } ChannelMapInfo; |
52 | |
53 | struct AVAudioResampleContext { |
54 | const AVClass *av_class; /**< AVClass for logging and AVOptions */ |
55 | |
56 | uint64_t in_channel_layout; /**< input channel layout */ |
57 | enum AVSampleFormat in_sample_fmt; /**< input sample format */ |
58 | int in_sample_rate; /**< input sample rate */ |
59 | uint64_t out_channel_layout; /**< output channel layout */ |
60 | enum AVSampleFormat out_sample_fmt; /**< output sample format */ |
61 | int out_sample_rate; /**< output sample rate */ |
62 | enum AVSampleFormat internal_sample_fmt; /**< internal sample format */ |
63 | enum AVMixCoeffType mix_coeff_type; /**< mixing coefficient type */ |
64 | double center_mix_level; /**< center mix level */ |
65 | double surround_mix_level; /**< surround mix level */ |
66 | double lfe_mix_level; /**< lfe mix level */ |
67 | int normalize_mix_level; /**< enable mix level normalization */ |
68 | int force_resampling; /**< force resampling */ |
69 | int filter_size; /**< length of each FIR filter in the resampling filterbank relative to the cutoff frequency */ |
70 | int phase_shift; /**< log2 of the number of entries in the resampling polyphase filterbank */ |
71 | int linear_interp; /**< if 1 then the resampling FIR filter will be linearly interpolated */ |
72 | double cutoff; /**< resampling cutoff frequency. 1.0 corresponds to half the output sample rate */ |
73 | enum AVResampleFilterType filter_type; /**< resampling filter type */ |
74 | int kaiser_beta; /**< beta value for Kaiser window (only applicable if filter_type == AV_FILTER_TYPE_KAISER) */ |
75 | enum AVResampleDitherMethod dither_method; /**< dither method */ |
76 | |
77 | int in_channels; /**< number of input channels */ |
78 | int out_channels; /**< number of output channels */ |
79 | int resample_channels; /**< number of channels used for resampling */ |
80 | int downmix_needed; /**< downmixing is needed */ |
81 | int upmix_needed; /**< upmixing is needed */ |
82 | int mixing_needed; /**< either upmixing or downmixing is needed */ |
83 | int resample_needed; /**< resampling is needed */ |
84 | int in_convert_needed; /**< input sample format conversion is needed */ |
85 | int out_convert_needed; /**< output sample format conversion is needed */ |
86 | int in_copy_needed; /**< input data copy is needed */ |
87 | |
88 | AudioData *in_buffer; /**< buffer for converted input */ |
89 | AudioData *resample_out_buffer; /**< buffer for output from resampler */ |
90 | AudioData *out_buffer; /**< buffer for converted output */ |
91 | AVAudioFifo *out_fifo; /**< FIFO for output samples */ |
92 | |
93 | AudioConvert *ac_in; /**< input sample format conversion context */ |
94 | AudioConvert *ac_out; /**< output sample format conversion context */ |
95 | ResampleContext *resample; /**< resampling context */ |
96 | AudioMix *am; /**< channel mixing context */ |
97 | enum AVMatrixEncoding matrix_encoding; /**< matrixed stereo encoding */ |
98 | |
99 | /** |
100 | * mix matrix |
101 | * only used if avresample_set_matrix() is called before avresample_open() |
102 | */ |
103 | double *mix_matrix; |
104 | |
105 | int use_channel_map; |
106 | enum RemapPoint remap_point; |
107 | ChannelMapInfo ch_map_info; |
108 | }; |
109 | |
110 | |
111 | void ff_audio_resample_init_aarch64(ResampleContext *c, |
112 | enum AVSampleFormat sample_fmt); |
113 | void ff_audio_resample_init_arm(ResampleContext *c, |
114 | enum AVSampleFormat sample_fmt); |
115 | |
116 | #endif /* AVRESAMPLE_INTERNAL_H */ |
117 |