1 /* Copyright (c) 2012 Xiph.Org Foundation
2 Written by Jean-Marc Valin */
3 /*
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions
6 are met:
7
8 - Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10
11 - Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14
15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
19 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28
29 #ifndef OPUS_PRIVATE_H
30 #define OPUS_PRIVATE_H
31
32 #include "arch.h"
33 #include "opus.h"
34 #include "celt.h"
35
36 #include <stddef.h> /* offsetof */
37
38 struct OpusRepacketizer {
39 unsigned char toc;
40 int nb_frames;
41 const unsigned char *frames[48];
42 opus_int16 len[48];
43 int framesize;
44 };
45
46 typedef struct ChannelLayout {
47 int nb_channels;
48 int nb_streams;
49 int nb_coupled_streams;
50 unsigned char mapping[256];
51 } ChannelLayout;
52
53 int validate_layout(const ChannelLayout *layout);
54 int get_left_channel(const ChannelLayout *layout, int stream_id, int prev);
55 int get_right_channel(const ChannelLayout *layout, int stream_id, int prev);
56 int get_mono_channel(const ChannelLayout *layout, int stream_id, int prev);
57
58
59
60 #define MODE_SILK_ONLY 1000
61 #define MODE_HYBRID 1001
62 #define MODE_CELT_ONLY 1002
63
64 #define OPUS_SET_VOICE_RATIO_REQUEST 11018
65 #define OPUS_GET_VOICE_RATIO_REQUEST 11019
66
67 /** Configures the encoder's expected percentage of voice
68 * opposed to music or other signals.
69 *
70 * @note This interface is currently more aspiration than actuality. It's
71 * ultimately expected to bias an automatic signal classifier, but it currently
72 * just shifts the static bitrate to mode mapping around a little bit.
73 *
74 * @param[in] x <tt>int</tt>: Voice percentage in the range 0-100, inclusive.
75 * @hideinitializer */
76 #define OPUS_SET_VOICE_RATIO(x) OPUS_SET_VOICE_RATIO_REQUEST, __opus_check_int(x)
77 /** Gets the encoder's configured voice ratio value, @see OPUS_SET_VOICE_RATIO
78 *
79 * @param[out] x <tt>int*</tt>: Voice percentage in the range 0-100, inclusive.
80 * @hideinitializer */
81 #define OPUS_GET_VOICE_RATIO(x) OPUS_GET_VOICE_RATIO_REQUEST, __opus_check_int_ptr(x)
82
83
84 #define OPUS_SET_FORCE_MODE_REQUEST 11002
85 #define OPUS_SET_FORCE_MODE(x) OPUS_SET_FORCE_MODE_REQUEST, __opus_check_int(x)
86
87 typedef void (*downmix_func)(const void *, opus_val32 *, int, int, int, int, int);
88 void downmix_float(const void *_x, opus_val32 *sub, int subframe, int offset, int c1, int c2, int C);
89 void downmix_int(const void *_x, opus_val32 *sub, int subframe, int offset, int c1, int c2, int C);
90
91 int encode_size(int size, unsigned char *data);
92
93 opus_int32 frame_size_select(opus_int32 frame_size, int variable_duration, opus_int32 Fs);
94
95 opus_int32 compute_frame_size(const void *analysis_pcm, int frame_size,
96 int variable_duration, int C, opus_int32 Fs, int bitrate_bps,
97 int delay_compensation, downmix_func downmix
98 #ifndef DISABLE_FLOAT_API
99 , float *subframe_mem
100 #endif
101 );
102
103 opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_size,
104 unsigned char *data, opus_int32 out_data_bytes, int lsb_depth,
105 const void *analysis_pcm, opus_int32 analysis_size, int c1, int c2,
106 int analysis_channels, downmix_func downmix, int float_api);
107
108 int opus_decode_native(OpusDecoder *st, const unsigned char *data, opus_int32 len,
109 opus_val16 *pcm, int frame_size, int decode_fec, int self_delimited,
110 opus_int32 *packet_offset, int soft_clip);
111
112 /* Make sure everything is properly aligned. */
align(int i)113 static OPUS_INLINE int align(int i)
114 {
115 struct foo {char c; union { void* p; opus_int32 i; opus_val32 v; } u;};
116
117 unsigned int alignment = offsetof(struct foo, u);
118
119 /* Optimizing compilers should optimize div and multiply into and
120 for all sensible alignment values. */
121 return ((i + alignment - 1) / alignment) * alignment;
122 }
123
124 int opus_packet_parse_impl(const unsigned char *data, opus_int32 len,
125 int self_delimited, unsigned char *out_toc,
126 const unsigned char *frames[48], opus_int16 size[48],
127 int *payload_offset, opus_int32 *packet_offset);
128
129 opus_int32 opus_repacketizer_out_range_impl(OpusRepacketizer *rp, int begin, int end,
130 unsigned char *data, opus_int32 maxlen, int self_delimited, int pad);
131
132 int pad_frame(unsigned char *data, opus_int32 len, opus_int32 new_len);
133
134 #endif /* OPUS_PRIVATE_H */
135