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Diffstat (limited to 'src/libspeex/speex.c')
-rw-r--r-- | src/libspeex/speex.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/src/libspeex/speex.c b/src/libspeex/speex.c new file mode 100644 index 0000000..78e1a7a --- /dev/null +++ b/src/libspeex/speex.c @@ -0,0 +1,250 @@ +/* Copyright (C) 2002 Jean-Marc Valin + File: speex.c + + Basic Speex functions + + 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. + +*/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "modes.h" +#include <math.h> +#include "os_support.h" + +#ifndef NULL +#define NULL 0 +#endif + +#define MAX_IN_SAMPLES 640 + + + +void *speex_encoder_init(const SpeexMode *mode) +{ + return mode->enc_init(mode); +} + +void *speex_decoder_init(const SpeexMode *mode) +{ + return mode->dec_init(mode); +} + +void speex_encoder_destroy(void *state) +{ + (*((SpeexMode**)state))->enc_destroy(state); +} + +void speex_decoder_destroy(void *state) +{ + (*((SpeexMode**)state))->dec_destroy(state); +} + + + +int speex_encode_native(void *state, spx_word16_t *in, SpeexBits *bits) +{ + return (*((SpeexMode**)state))->enc(state, in, bits); +} + +int speex_decode_native(void *state, SpeexBits *bits, spx_word16_t *out) +{ + return (*((SpeexMode**)state))->dec(state, bits, out); +} + + + +#ifdef FIXED_POINT + +#ifndef DISABLE_FLOAT_API +int speex_encode(void *state, float *in, SpeexBits *bits) +{ + int i; + spx_int32_t N; + spx_int16_t short_in[MAX_IN_SAMPLES]; + speex_encoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N); + for (i=0;i<N;i++) + { + if (in[i]>32767.f) + short_in[i] = 32767; + else if (in[i]<-32768.f) + short_in[i] = -32768; + else + short_in[i] = (spx_int16_t)floor(.5+in[i]); + } + return (*((SpeexMode**)state))->enc(state, short_in, bits); +} +#endif /* #ifndef DISABLE_FLOAT_API */ + +int speex_encode_int(void *state, spx_int16_t *in, SpeexBits *bits) +{ + SpeexMode *mode; + mode = *(SpeexMode**)state; + return (mode)->enc(state, in, bits); +} + +#ifndef DISABLE_FLOAT_API +int speex_decode(void *state, SpeexBits *bits, float *out) +{ + int i, ret; + spx_int32_t N; + spx_int16_t short_out[MAX_IN_SAMPLES]; + speex_decoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N); + ret = (*((SpeexMode**)state))->dec(state, bits, short_out); + for (i=0;i<N;i++) + out[i] = short_out[i]; + return ret; +} +#endif /* #ifndef DISABLE_FLOAT_API */ + +int speex_decode_int(void *state, SpeexBits *bits, spx_int16_t *out) +{ + SpeexMode *mode = *(SpeexMode**)state; + return (mode)->dec(state, bits, out); +} + +#else + +int speex_encode(void *state, float *in, SpeexBits *bits) +{ + return (*((SpeexMode**)state))->enc(state, in, bits); +} + +int speex_encode_int(void *state, spx_int16_t *in, SpeexBits *bits) +{ + int i; + spx_int32_t N; + float float_in[MAX_IN_SAMPLES]; + speex_encoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N); + for (i=0;i<N;i++) + float_in[i] = in[i]; + return (*((SpeexMode**)state))->enc(state, float_in, bits); +} + +int speex_decode(void *state, SpeexBits *bits, float *out) +{ + return (*((SpeexMode**)state))->dec(state, bits, out); +} + +int speex_decode_int(void *state, SpeexBits *bits, spx_int16_t *out) +{ + int i; + spx_int32_t N; + float float_out[MAX_IN_SAMPLES]; + int ret; + speex_decoder_ctl(state, SPEEX_GET_FRAME_SIZE, &N); + ret = (*((SpeexMode**)state))->dec(state, bits, float_out); + for (i=0;i<N;i++) + { + if (float_out[i]>32767.f) + out[i] = 32767; + else if (float_out[i]<-32768.f) + out[i] = -32768; + else + out[i] = (spx_int16_t)floor(.5+float_out[i]); + } + return ret; +} +#endif + + + +int speex_encoder_ctl(void *state, int request, void *ptr) +{ + return (*((SpeexMode**)state))->enc_ctl(state, request, ptr); +} + +int speex_decoder_ctl(void *state, int request, void *ptr) +{ + return (*((SpeexMode**)state))->dec_ctl(state, request, ptr); +} + + + +int nb_mode_query(const void *mode, int request, void *ptr) +{ + const SpeexNBMode *m = (const SpeexNBMode*)mode; + + switch (request) + { + case SPEEX_MODE_FRAME_SIZE: + *((int*)ptr)=m->frameSize; + break; + case SPEEX_SUBMODE_BITS_PER_FRAME: + if (*((int*)ptr)==0) + *((int*)ptr) = NB_SUBMODE_BITS+1; + else if (m->submodes[*((int*)ptr)]==NULL) + *((int*)ptr) = -1; + else + *((int*)ptr) = m->submodes[*((int*)ptr)]->bits_per_frame; + break; + default: + speex_warning_int("Unknown nb_mode_query request: ", request); + return -1; + } + return 0; +} + + + +int speex_lib_ctl(int request, void *ptr) +{ + switch (request) + { + case SPEEX_LIB_GET_MAJOR_VERSION: + *((int*)ptr) = SPEEX_MAJOR_VERSION; + break; + case SPEEX_LIB_GET_MINOR_VERSION: + *((int*)ptr) = SPEEX_MINOR_VERSION; + break; + case SPEEX_LIB_GET_MICRO_VERSION: + *((int*)ptr) = SPEEX_MICRO_VERSION; + break; + case SPEEX_LIB_GET_EXTRA_VERSION: + *((const char**)ptr) = SPEEX_EXTRA_VERSION; + break; + case SPEEX_LIB_GET_VERSION_STRING: + *((const char**)ptr) = SPEEX_VERSION; + break; + /*case SPEEX_LIB_SET_ALLOC_FUNC: + break; + case SPEEX_LIB_GET_ALLOC_FUNC: + break; + case SPEEX_LIB_SET_FREE_FUNC: + break; + case SPEEX_LIB_GET_FREE_FUNC: + break;*/ + default: + speex_warning_int("Unknown wb_mode_query request: ", request); + return -1; + } + return 0; +} |