From: "Lu, Han" han.lu@intel.com
Add functions that converting audio samples to double data for analysis, and functions that converting float data to audio samples for playback.
Signed-off-by: Lu, Han han.lu@intel.com Signed-off-by: Liam Girdwood liam.r.girdwood@intel.com Signed-off-by: Bernard Gautier bernard.gautier@intel.com
diff --git a/bat/convert.c b/bat/convert.c new file mode 100644 index 0000000..dcbe912 --- /dev/null +++ b/bat/convert.c @@ -0,0 +1,113 @@ +/* + * Copyright (C) 2013-2015 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <stdio.h> +#include <stddef.h> +#include <stdlib.h> +#include <stdint.h> + +void convert_uint8_to_double(void *buf, double *val, int samples) +{ + int i; + + for (i = 0; i < samples; i++) + val[i] = ((uint8_t *) buf)[i]; +} + +void convert_int16_to_double(void *buf, double *val, int samples) +{ + int i; + + for (i = 0; i < samples; i++) + val[i] = ((int16_t *) buf)[i]; +} + +void convert_int24_to_double(void *buf, double *val, int samples) +{ + int i; + int32_t tmp; + + for (i = 0; i < samples; i++) { + tmp = ((uint8_t *) buf)[i * 3 + 2] << 24; + tmp |= ((uint8_t *) buf)[i * 3 + 1] << 16; + tmp |= ((uint8_t *) buf)[i * 3] << 8; + tmp >>= 8; + val[i] = tmp; + } +} + +void convert_int32_to_double(void *buf, double *val, int samples) +{ + int i; + + for (i = 0; i < samples; i++) + val[i] = ((int32_t *) buf)[i]; +} + +void convert_float_to_uint8(float *val, void *buf, int samples, int channels) +{ + int i, c, idx; + + for (i = 0; i < samples; i++) { + for (c = 0; c < channels; c++) { + idx = i * channels + c; + ((uint8_t *) buf)[idx] = (uint8_t) val[idx]; + } + } +} + +void convert_float_to_int16(float *val, void *buf, int samples, int channels) +{ + int i, c, idx; + + for (i = 0; i < samples; i++) { + for (c = 0; c < channels; c++) { + idx = i * channels + c; + ((int16_t *) buf)[idx] = (int16_t) val[idx]; + } + } +} + +void convert_float_to_int24(float *val, void *buf, int samples, int channels) +{ + int i, c, idx_f, idx_i; + int32_t val_f_i; + + for (i = 0; i < samples; i++) { + for (c = 0; c < channels; c++) { + idx_f = i * channels + c; + idx_i = 3 * idx_f; + val_f_i = (int32_t) val[idx_f]; + ((int8_t *) buf)[idx_i + 0] = + (int8_t) (val_f_i & 0xff); + ((int8_t *) buf)[idx_i + 1] = + (int8_t) ((val_f_i >> 8) & 0xff); + ((int8_t *) buf)[idx_i + 2] = + (int8_t) ((val_f_i >> 16) & 0xff); + } + } +} + +void convert_float_to_int32(float *val, void *buf, int samples, int channels) +{ + int i, c, idx; + + for (i = 0; i < samples; i++) { + for (c = 0; c < channels; c++) { + idx = i * channels + c; + ((int32_t *) buf)[idx] = (int32_t) val[idx]; + } + } +} diff --git a/bat/convert.h b/bat/convert.h new file mode 100644 index 0000000..28828ba --- /dev/null +++ b/bat/convert.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2013-2015 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +void convert_uint8_to_double(void *, double *, int); +void convert_int16_to_double(void *, double *, int); +void convert_int24_to_double(void *, double *, int); +void convert_int32_to_double(void *, double *, int); +void convert_float_to_uint8(float *, void *, int, int); +void convert_float_to_int16(float *, void *, int, int); +void convert_float_to_int24(float *, void *, int, int); +void convert_float_to_int32(float *, void *, int, int);