diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/opus_projection_decoder.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/opus_projection_decoder.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/opus_projection_decoder.c b/lib/rbcodec/codecs/libopus/opus_projection_decoder.c new file mode 100644 index 0000000000..c2e07d5bcf --- /dev/null +++ b/lib/rbcodec/codecs/libopus/opus_projection_decoder.c | |||
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1 | /* Copyright (c) 2017 Google Inc. | ||
2 | Written by Andrew Allen */ | ||
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 | #ifdef HAVE_CONFIG_H | ||
29 | #include "config.h" | ||
30 | #endif | ||
31 | |||
32 | #include "mathops.h" | ||
33 | #include "os_support.h" | ||
34 | #include "opus_private.h" | ||
35 | #include "opus_defines.h" | ||
36 | #include "opus_projection.h" | ||
37 | #include "opus_multistream.h" | ||
38 | #include "mapping_matrix.h" | ||
39 | #include "stack_alloc.h" | ||
40 | |||
41 | struct OpusProjectionDecoder | ||
42 | { | ||
43 | opus_int32 demixing_matrix_size_in_bytes; | ||
44 | /* Encoder states go here */ | ||
45 | }; | ||
46 | |||
47 | #if !defined(DISABLE_FLOAT_API) | ||
48 | static void opus_projection_copy_channel_out_float( | ||
49 | void *dst, | ||
50 | int dst_stride, | ||
51 | int dst_channel, | ||
52 | const opus_val16 *src, | ||
53 | int src_stride, | ||
54 | int frame_size, | ||
55 | void *user_data) | ||
56 | { | ||
57 | float *float_dst; | ||
58 | const MappingMatrix *matrix; | ||
59 | float_dst = (float *)dst; | ||
60 | matrix = (const MappingMatrix *)user_data; | ||
61 | |||
62 | if (dst_channel == 0) | ||
63 | OPUS_CLEAR(float_dst, frame_size * dst_stride); | ||
64 | |||
65 | if (src != NULL) | ||
66 | mapping_matrix_multiply_channel_out_float(matrix, src, dst_channel, | ||
67 | src_stride, float_dst, dst_stride, frame_size); | ||
68 | } | ||
69 | #endif | ||
70 | |||
71 | static void opus_projection_copy_channel_out_short( | ||
72 | void *dst, | ||
73 | int dst_stride, | ||
74 | int dst_channel, | ||
75 | const opus_val16 *src, | ||
76 | int src_stride, | ||
77 | int frame_size, | ||
78 | void *user_data) | ||
79 | { | ||
80 | opus_int16 *short_dst; | ||
81 | const MappingMatrix *matrix; | ||
82 | short_dst = (opus_int16 *)dst; | ||
83 | matrix = (const MappingMatrix *)user_data; | ||
84 | if (dst_channel == 0) | ||
85 | OPUS_CLEAR(short_dst, frame_size * dst_stride); | ||
86 | |||
87 | if (src != NULL) | ||
88 | mapping_matrix_multiply_channel_out_short(matrix, src, dst_channel, | ||
89 | src_stride, short_dst, dst_stride, frame_size); | ||
90 | } | ||
91 | |||
92 | static MappingMatrix *get_dec_demixing_matrix(OpusProjectionDecoder *st) | ||
93 | { | ||
94 | /* void* cast avoids clang -Wcast-align warning */ | ||
95 | return (MappingMatrix*)(void*)((char*)st + | ||
96 | align(sizeof(OpusProjectionDecoder))); | ||
97 | } | ||
98 | |||
99 | static OpusMSDecoder *get_multistream_decoder(OpusProjectionDecoder *st) | ||
100 | { | ||
101 | /* void* cast avoids clang -Wcast-align warning */ | ||
102 | return (OpusMSDecoder*)(void*)((char*)st + | ||
103 | align(sizeof(OpusProjectionDecoder) + | ||
104 | st->demixing_matrix_size_in_bytes)); | ||
105 | } | ||
106 | |||
107 | opus_int32 opus_projection_decoder_get_size(int channels, int streams, | ||
108 | int coupled_streams) | ||
109 | { | ||
110 | opus_int32 matrix_size; | ||
111 | opus_int32 decoder_size; | ||
112 | |||
113 | matrix_size = | ||
114 | mapping_matrix_get_size(streams + coupled_streams, channels); | ||
115 | if (!matrix_size) | ||
116 | return 0; | ||
117 | |||
118 | decoder_size = opus_multistream_decoder_get_size(streams, coupled_streams); | ||
119 | if (!decoder_size) | ||
120 | return 0; | ||
121 | |||
122 | return align(sizeof(OpusProjectionDecoder)) + matrix_size + decoder_size; | ||
123 | } | ||
124 | |||
125 | int opus_projection_decoder_init(OpusProjectionDecoder *st, opus_int32 Fs, | ||
126 | int channels, int streams, int coupled_streams, | ||
127 | unsigned char *demixing_matrix, opus_int32 demixing_matrix_size) | ||
128 | { | ||
129 | int nb_input_streams; | ||
130 | opus_int32 expected_matrix_size; | ||
131 | int i, ret; | ||
132 | unsigned char mapping[255]; | ||
133 | VARDECL(opus_int16, buf); | ||
134 | ALLOC_STACK; | ||
135 | |||
136 | /* Verify supplied matrix size. */ | ||
137 | nb_input_streams = streams + coupled_streams; | ||
138 | expected_matrix_size = nb_input_streams * channels * sizeof(opus_int16); | ||
139 | if (expected_matrix_size != demixing_matrix_size) | ||
140 | { | ||
141 | RESTORE_STACK; | ||
142 | return OPUS_BAD_ARG; | ||
143 | } | ||
144 | |||
145 | /* Convert demixing matrix input into internal format. */ | ||
146 | ALLOC(buf, nb_input_streams * channels, opus_int16); | ||
147 | for (i = 0; i < nb_input_streams * channels; i++) | ||
148 | { | ||
149 | int s = demixing_matrix[2*i + 1] << 8 | demixing_matrix[2*i]; | ||
150 | s = ((s & 0xFFFF) ^ 0x8000) - 0x8000; | ||
151 | buf[i] = (opus_int16)s; | ||
152 | } | ||
153 | |||
154 | /* Assign demixing matrix. */ | ||
155 | st->demixing_matrix_size_in_bytes = | ||
156 | mapping_matrix_get_size(channels, nb_input_streams); | ||
157 | if (!st->demixing_matrix_size_in_bytes) | ||
158 | { | ||
159 | RESTORE_STACK; | ||
160 | return OPUS_BAD_ARG; | ||
161 | } | ||
162 | |||
163 | mapping_matrix_init(get_dec_demixing_matrix(st), channels, nb_input_streams, 0, | ||
164 | buf, demixing_matrix_size); | ||
165 | |||
166 | /* Set trivial mapping so each input channel pairs with a matrix column. */ | ||
167 | for (i = 0; i < channels; i++) | ||
168 | mapping[i] = i; | ||
169 | |||
170 | ret = opus_multistream_decoder_init( | ||
171 | get_multistream_decoder(st), Fs, channels, streams, coupled_streams, mapping); | ||
172 | RESTORE_STACK; | ||
173 | return ret; | ||
174 | } | ||
175 | |||
176 | OpusProjectionDecoder *opus_projection_decoder_create( | ||
177 | opus_int32 Fs, int channels, int streams, int coupled_streams, | ||
178 | unsigned char *demixing_matrix, opus_int32 demixing_matrix_size, int *error) | ||
179 | { | ||
180 | int size; | ||
181 | int ret; | ||
182 | OpusProjectionDecoder *st; | ||
183 | |||
184 | /* Allocate space for the projection decoder. */ | ||
185 | size = opus_projection_decoder_get_size(channels, streams, coupled_streams); | ||
186 | if (!size) { | ||
187 | if (error) | ||
188 | *error = OPUS_ALLOC_FAIL; | ||
189 | return NULL; | ||
190 | } | ||
191 | st = (OpusProjectionDecoder *)opus_alloc(size); | ||
192 | if (!st) | ||
193 | { | ||
194 | if (error) | ||
195 | *error = OPUS_ALLOC_FAIL; | ||
196 | return NULL; | ||
197 | } | ||
198 | |||
199 | /* Initialize projection decoder with provided settings. */ | ||
200 | ret = opus_projection_decoder_init(st, Fs, channels, streams, coupled_streams, | ||
201 | demixing_matrix, demixing_matrix_size); | ||
202 | if (ret != OPUS_OK) | ||
203 | { | ||
204 | opus_free(st); | ||
205 | st = NULL; | ||
206 | } | ||
207 | if (error) | ||
208 | *error = ret; | ||
209 | return st; | ||
210 | } | ||
211 | |||
212 | #ifdef FIXED_POINT | ||
213 | int opus_projection_decode(OpusProjectionDecoder *st, const unsigned char *data, | ||
214 | opus_int32 len, opus_int16 *pcm, int frame_size, | ||
215 | int decode_fec) | ||
216 | { | ||
217 | return opus_multistream_decode_native(get_multistream_decoder(st), data, len, | ||
218 | pcm, opus_projection_copy_channel_out_short, frame_size, decode_fec, 0, | ||
219 | get_dec_demixing_matrix(st)); | ||
220 | } | ||
221 | #else | ||
222 | int opus_projection_decode(OpusProjectionDecoder *st, const unsigned char *data, | ||
223 | opus_int32 len, opus_int16 *pcm, int frame_size, | ||
224 | int decode_fec) | ||
225 | { | ||
226 | return opus_multistream_decode_native(get_multistream_decoder(st), data, len, | ||
227 | pcm, opus_projection_copy_channel_out_short, frame_size, decode_fec, 1, | ||
228 | get_dec_demixing_matrix(st)); | ||
229 | } | ||
230 | #endif | ||
231 | |||
232 | #ifndef DISABLE_FLOAT_API | ||
233 | int opus_projection_decode_float(OpusProjectionDecoder *st, const unsigned char *data, | ||
234 | opus_int32 len, float *pcm, int frame_size, int decode_fec) | ||
235 | { | ||
236 | return opus_multistream_decode_native(get_multistream_decoder(st), data, len, | ||
237 | pcm, opus_projection_copy_channel_out_float, frame_size, decode_fec, 0, | ||
238 | get_dec_demixing_matrix(st)); | ||
239 | } | ||
240 | #endif | ||
241 | |||
242 | int opus_projection_decoder_ctl(OpusProjectionDecoder *st, int request, ...) | ||
243 | { | ||
244 | va_list ap; | ||
245 | int ret = OPUS_OK; | ||
246 | |||
247 | va_start(ap, request); | ||
248 | ret = opus_multistream_decoder_ctl_va_list(get_multistream_decoder(st), | ||
249 | request, ap); | ||
250 | va_end(ap); | ||
251 | return ret; | ||
252 | } | ||
253 | |||
254 | void opus_projection_decoder_destroy(OpusProjectionDecoder *st) | ||
255 | { | ||
256 | opus_free(st); | ||
257 | } | ||
258 | |||