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Diffstat (limited to 'lib/rbcodec/codecs/libspeex/fftwrap.h')
-rw-r--r-- | lib/rbcodec/codecs/libspeex/fftwrap.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libspeex/fftwrap.h b/lib/rbcodec/codecs/libspeex/fftwrap.h new file mode 100644 index 0000000000..dfaf489441 --- /dev/null +++ b/lib/rbcodec/codecs/libspeex/fftwrap.h | |||
@@ -0,0 +1,58 @@ | |||
1 | /* Copyright (C) 2005 Jean-Marc Valin | ||
2 | File: fftwrap.h | ||
3 | |||
4 | Wrapper for various FFTs | ||
5 | |||
6 | Redistribution and use in source and binary forms, with or without | ||
7 | modification, are permitted provided that the following conditions | ||
8 | are met: | ||
9 | |||
10 | - Redistributions of source code must retain the above copyright | ||
11 | notice, this list of conditions and the following disclaimer. | ||
12 | |||
13 | - Redistributions in binary form must reproduce the above copyright | ||
14 | notice, this list of conditions and the following disclaimer in the | ||
15 | documentation and/or other materials provided with the distribution. | ||
16 | |||
17 | - Neither the name of the Xiph.org Foundation nor the names of its | ||
18 | contributors may be used to endorse or promote products derived from | ||
19 | this software without specific prior written permission. | ||
20 | |||
21 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
22 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
23 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
24 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR | ||
25 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
26 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
27 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
28 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
29 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
30 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
31 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
32 | |||
33 | */ | ||
34 | |||
35 | #ifndef FFTWRAP_H | ||
36 | #define FFTWRAP_H | ||
37 | |||
38 | #include "arch.h" | ||
39 | |||
40 | /** Compute tables for an FFT */ | ||
41 | void *spx_fft_init(int size); | ||
42 | |||
43 | /** Destroy tables for an FFT */ | ||
44 | void spx_fft_destroy(void *table); | ||
45 | |||
46 | /** Forward (real to half-complex) transform */ | ||
47 | void spx_fft(void *table, spx_word16_t *in, spx_word16_t *out); | ||
48 | |||
49 | /** Backward (half-complex to real) transform */ | ||
50 | void spx_ifft(void *table, spx_word16_t *in, spx_word16_t *out); | ||
51 | |||
52 | /** Forward (real to half-complex) transform of float data */ | ||
53 | void spx_fft_float(void *table, float *in, float *out); | ||
54 | |||
55 | /** Backward (half-complex to real) transform of float data */ | ||
56 | void spx_ifft_float(void *table, float *in, float *out); | ||
57 | |||
58 | #endif | ||