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/* RAW PCM output */
/*
* This file is part of gapk (GSM Audio Pocket Knife).
*
* gapk 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 3 of the License, or
* (at your option) any later version.
*
* gapk 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.
*
* You should have received a copy of the GNU General Public License
* along with gapk. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <gapk/codecs.h>
#include <gapk/formats.h>
static int
rawpcm_s16le_from_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
int i;
const uint16_t *samples = (const uint16_t *)src;
assert(src_len == PCM_CANON_LEN);
for (i=0; i<160; i++) {
uint16_t w = samples[i];
dst[(i<<1) ] = w & 0xff;
dst[(i<<1)+1] = (w >> 8) & 0xff;
}
return PCM_CANON_LEN;
}
static int
rawpcm_s16le_to_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
{
int i;
uint16_t *samples = (uint16_t *)dst;
assert(src_len == PCM_CANON_LEN);
for (i=0; i<160; i++)
samples[i] = (src[(i<<1)+1] << 8) | src[(i<<1)];
return PCM_CANON_LEN;
}
const struct format_desc fmt_rawpcm_s16le = {
.type = FMT_RAWPCM_S16LE,
.codec_type = CODEC_PCM,
.name = "rawpcm-s16le",
.description = "Raw PCM samples Signed 16 bits little endian",
.frame_len = PCM_CANON_LEN,
.conv_from_canon = rawpcm_s16le_from_canon,
.conv_to_canon = rawpcm_s16le_to_canon,
};
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