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/vbr.h | 70 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 lib/rbcodec/codecs/libspeex/vbr.h (limited to 'lib/rbcodec/codecs/libspeex/vbr.h') diff --git a/lib/rbcodec/codecs/libspeex/vbr.h b/lib/rbcodec/codecs/libspeex/vbr.h new file mode 100644 index 0000000000..ff1e3e46f2 --- /dev/null +++ b/lib/rbcodec/codecs/libspeex/vbr.h @@ -0,0 +1,70 @@ +/* Copyright (C) 2002 Jean-Marc Valin */ +/** + @file vbr.h + @brief Variable Bit-Rate (VBR) related routines +*/ +/* + 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 VBR_H +#define VBR_H + +#include "arch.h" + +#define VBR_MEMORY_SIZE 5 + +extern const float vbr_nb_thresh[9][11]; +extern const float vbr_hb_thresh[5][11]; +extern const float vbr_uhb_thresh[2][11]; + +/** VBR state. */ +typedef struct VBRState { + float energy_alpha; + float average_energy; + float last_energy; + float last_log_energy[VBR_MEMORY_SIZE]; + float accum_sum; + float last_pitch_coef; + float soft_pitch; + float last_quality; + float noise_level; + float noise_accum; + float noise_accum_count; + int consec_noise; +} VBRState; + +void vbr_init(VBRState *vbr); + +float vbr_analysis(VBRState *vbr, spx_word16_t *sig, int len, int pitch, float pitch_coef); + +void vbr_destroy(VBRState *vbr); + +#endif -- cgit v1.2.3