250 lines
6.5 KiB
C
250 lines
6.5 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin
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File: speex.c
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Basic Speex functions
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "modes.h"
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#include <math.h>
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#include "os_support.h"
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#ifndef NULL
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#define NULL 0
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#endif
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#define MAX_IN_SAMPLES 640
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EXPORT void *speex_encoder_init(const SpeexMode *mode)
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{
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return mode->enc_init(mode);
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}
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EXPORT void *speex_decoder_init(const SpeexMode *mode)
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{
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return mode->dec_init(mode);
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}
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EXPORT void speex_encoder_destroy(void *state)
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{
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(*((SpeexMode**)state))->enc_destroy(state);
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}
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EXPORT void speex_decoder_destroy(void *state)
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{
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(*((SpeexMode**)state))->dec_destroy(state);
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}
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int speex_encode_native(void *state, spx_word16_t *in, SpeexBits *bits)
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{
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return (*((SpeexMode**)state))->enc(state, in, bits);
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}
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int speex_decode_native(void *state, SpeexBits *bits, spx_word16_t *out)
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{
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return (*((SpeexMode**)state))->dec(state, bits, out);
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}
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#ifdef FIXED_POINT
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#ifndef DISABLE_FLOAT_API
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EXPORT int speex_encode(void *state, float *in, SpeexBits *bits)
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{
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int i;
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spx_int32_t N;
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spx_int16_t short_in[MAX_IN_SAMPLES];
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speex_encoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N);
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for (i=0;i<N;i++)
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{
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if (in[i]>32767.f)
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short_in[i] = 32767;
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else if (in[i]<-32768.f)
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short_in[i] = -32768;
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else
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short_in[i] = (spx_int16_t)floor(.5+in[i]);
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}
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return (*((SpeexMode**)state))->enc(state, short_in, bits);
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}
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#endif /* #ifndef DISABLE_FLOAT_API */
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EXPORT int speex_encode_int(void *state, spx_int16_t *in, SpeexBits *bits)
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{
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SpeexMode *mode;
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mode = *(SpeexMode**)state;
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return (mode)->enc(state, in, bits);
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}
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#ifndef DISABLE_FLOAT_API
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EXPORT int speex_decode(void *state, SpeexBits *bits, float *out)
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{
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int i, ret;
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spx_int32_t N;
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spx_int16_t short_out[MAX_IN_SAMPLES];
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speex_decoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N);
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ret = (*((SpeexMode**)state))->dec(state, bits, short_out);
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for (i=0;i<N;i++)
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out[i] = short_out[i];
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return ret;
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}
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#endif /* #ifndef DISABLE_FLOAT_API */
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EXPORT int speex_decode_int(void *state, SpeexBits *bits, spx_int16_t *out)
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{
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SpeexMode *mode = *(SpeexMode**)state;
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return (mode)->dec(state, bits, out);
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}
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#else
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EXPORT int speex_encode(void *state, float *in, SpeexBits *bits)
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{
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return (*((SpeexMode**)state))->enc(state, in, bits);
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}
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EXPORT int speex_encode_int(void *state, spx_int16_t *in, SpeexBits *bits)
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{
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int i;
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spx_int32_t N;
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float float_in[MAX_IN_SAMPLES];
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speex_encoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N);
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for (i=0;i<N;i++)
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float_in[i] = in[i];
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return (*((SpeexMode**)state))->enc(state, float_in, bits);
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}
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EXPORT int speex_decode(void *state, SpeexBits *bits, float *out)
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{
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return (*((SpeexMode**)state))->dec(state, bits, out);
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}
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EXPORT int speex_decode_int(void *state, SpeexBits *bits, spx_int16_t *out)
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{
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int i;
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spx_int32_t N;
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float float_out[MAX_IN_SAMPLES];
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int ret;
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speex_decoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N);
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ret = (*((SpeexMode**)state))->dec(state, bits, float_out);
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for (i=0;i<N;i++)
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{
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if (float_out[i]>32767.f)
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out[i] = 32767;
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else if (float_out[i]<-32768.f)
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out[i] = -32768;
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else
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out[i] = (spx_int16_t)floor(.5+float_out[i]);
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}
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return ret;
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}
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#endif
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EXPORT int speex_encoder_ctl(void *state, int request, void *ptr)
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{
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return (*((SpeexMode**)state))->enc_ctl(state, request, ptr);
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}
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EXPORT int speex_decoder_ctl(void *state, int request, void *ptr)
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{
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return (*((SpeexMode**)state))->dec_ctl(state, request, ptr);
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}
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int nb_mode_query(const void *mode, int request, void *ptr)
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{
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const SpeexNBMode *m = (const SpeexNBMode*)mode;
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switch (request)
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{
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case SPEEX_MODE_FRAME_SIZE:
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*((int*)ptr)=m->frameSize;
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break;
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case SPEEX_SUBMODE_BITS_PER_FRAME:
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if (*((int*)ptr)==0)
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*((int*)ptr) = NB_SUBMODE_BITS+1;
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else if (m->submodes[*((int*)ptr)]==NULL)
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*((int*)ptr) = -1;
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else
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*((int*)ptr) = m->submodes[*((int*)ptr)]->bits_per_frame;
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break;
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default:
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speex_warning_int("Unknown nb_mode_query request: ", request);
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return -1;
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}
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return 0;
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}
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EXPORT int speex_lib_ctl(int request, void *ptr)
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{
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switch (request)
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{
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case SPEEX_LIB_GET_MAJOR_VERSION:
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*((int*)ptr) = SPEEX_MAJOR_VERSION;
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break;
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case SPEEX_LIB_GET_MINOR_VERSION:
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*((int*)ptr) = SPEEX_MINOR_VERSION;
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break;
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case SPEEX_LIB_GET_MICRO_VERSION:
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*((int*)ptr) = SPEEX_MICRO_VERSION;
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break;
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case SPEEX_LIB_GET_EXTRA_VERSION:
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*((const char**)ptr) = SPEEX_EXTRA_VERSION;
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break;
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case SPEEX_LIB_GET_VERSION_STRING:
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*((const char**)ptr) = SPEEX_VERSION;
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break;
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/*case SPEEX_LIB_SET_ALLOC_FUNC:
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break;
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case SPEEX_LIB_GET_ALLOC_FUNC:
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break;
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case SPEEX_LIB_SET_FREE_FUNC:
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break;
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case SPEEX_LIB_GET_FREE_FUNC:
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break;*/
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default:
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speex_warning_int("Unknown wb_mode_query request: ", request);
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return -1;
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}
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return 0;
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}
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