From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libspeex/fftwrap.h | 58 +++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 lib/rbcodec/codecs/libspeex/fftwrap.h (limited to 'lib/rbcodec/codecs/libspeex/fftwrap.h') 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 @@ +/* Copyright (C) 2005 Jean-Marc Valin + File: fftwrap.h + + Wrapper for various FFTs + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + - Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + - Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + - Neither the name of the Xiph.org Foundation nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR + CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +*/ + +#ifndef FFTWRAP_H +#define FFTWRAP_H + +#include "arch.h" + +/** Compute tables for an FFT */ +void *spx_fft_init(int size); + +/** Destroy tables for an FFT */ +void spx_fft_destroy(void *table); + +/** Forward (real to half-complex) transform */ +void spx_fft(void *table, spx_word16_t *in, spx_word16_t *out); + +/** Backward (half-complex to real) transform */ +void spx_ifft(void *table, spx_word16_t *in, spx_word16_t *out); + +/** Forward (real to half-complex) transform of float data */ +void spx_fft_float(void *table, float *in, float *out); + +/** Backward (half-complex to real) transform of float data */ +void spx_ifft_float(void *table, float *in, float *out); + +#endif -- cgit v1.2.3