h264_metadata: Add option to delete filler data
[libav.git] / libavresample / internal.h
1 /*
2 * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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 */