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/*
* This file is part of the bladeRF project:
* http://www.github.com/nuand/bladeRF
*
* Copyright (C) 2014 Nuand LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef STREAMING_FORMAT_H_
#define STREAMING_FORMAT_H_
#include "rel_assert.h"
/*
* Convert SC8Q8 samples to bytes
*/
static inline size_t sc8q7_to_bytes(size_t n_samples)
{
const size_t sample_size = 2 * sizeof(int8_t);
assert(n_samples <= (SIZE_MAX / sample_size));
return n_samples * sample_size;
}
/*
* Convert bytes to SC8Q8 samples
*/
static inline size_t bytes_to_sc8q7(size_t n_bytes)
{
const size_t sample_size = 2 * sizeof(int8_t);
assert((n_bytes % sample_size) == 0);
return n_bytes / sample_size;
}
/*
* Convert SC16Q11 samples to bytes
*/
static inline size_t sc16q11_to_bytes(size_t n_samples)
{
const size_t sample_size = 2 * sizeof(int16_t);
assert(n_samples <= (SIZE_MAX / sample_size));
return n_samples * sample_size;
}
/*
* Convert bytes to SC16Q11 samples
*/
static inline size_t bytes_to_sc16q11(size_t n_bytes)
{
const size_t sample_size = 2 * sizeof(int16_t);
assert((n_bytes % sample_size) == 0);
return n_bytes / sample_size;
}
/* Covert samples to bytes based upon the provided format */
static inline size_t samples_to_bytes(bladerf_format format, size_t n)
{
switch (format) {
case BLADERF_FORMAT_SC8_Q7:
case BLADERF_FORMAT_SC8_Q7_META:
return sc8q7_to_bytes(n);
case BLADERF_FORMAT_SC16_Q11:
case BLADERF_FORMAT_SC16_Q11_META:
return sc16q11_to_bytes(n);
case BLADERF_FORMAT_PACKET_META:
return n*4;
default:
assert(!"Invalid format");
return 0;
}
}
/* Convert bytes to samples based upon the provided format */
static inline size_t bytes_to_samples(bladerf_format format, size_t n)
{
switch (format) {
case BLADERF_FORMAT_SC8_Q7:
case BLADERF_FORMAT_SC8_Q7_META:
return bytes_to_sc8q7(n);
case BLADERF_FORMAT_SC16_Q11:
case BLADERF_FORMAT_SC16_Q11_META:
return bytes_to_sc16q11(n);
case BLADERF_FORMAT_PACKET_META:
return (n+3)/4;
default:
assert(!"Invalid format");
return 0;
}
}
#endif
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