2010-11-11 21:58:20 +00:00
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/* RAW PCM output */
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/*
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* This file is part of gapk (GSM Audio Pocket Knife).
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*
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* gapk is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* gapk is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with gapk. If not, see <http://www.gnu.org/licenses/>.
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*/
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2017-05-28 08:20:54 +00:00
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#include <assert.h>
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2017-08-30 13:26:02 +00:00
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#include <osmocom/gapk/codecs.h>
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#include <osmocom/gapk/formats.h>
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2010-11-11 21:58:20 +00:00
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static int
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2017-05-28 08:20:54 +00:00
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rawpcm_s16le_from_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
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2010-11-11 21:58:20 +00:00
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{
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int i;
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const uint16_t *samples = (const uint16_t *)src;
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2017-05-28 08:20:54 +00:00
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assert(src_len == PCM_CANON_LEN);
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2010-11-11 21:58:20 +00:00
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for (i=0; i<160; i++) {
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uint16_t w = samples[i];
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dst[(i<<1) ] = w & 0xff;
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dst[(i<<1)+1] = (w >> 8) & 0xff;
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}
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2017-05-28 08:20:54 +00:00
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return PCM_CANON_LEN;
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2010-11-11 21:58:20 +00:00
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}
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static int
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2017-05-28 08:20:54 +00:00
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rawpcm_s16le_to_canon(uint8_t *dst, const uint8_t *src, unsigned int src_len)
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2010-11-11 21:58:20 +00:00
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{
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int i;
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uint16_t *samples = (uint16_t *)dst;
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2017-05-28 08:20:54 +00:00
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assert(src_len == PCM_CANON_LEN);
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2010-11-11 21:58:20 +00:00
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for (i=0; i<160; i++)
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samples[i] = (src[(i<<1)+1] << 8) | src[(i<<1)];
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2017-05-28 08:20:54 +00:00
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return PCM_CANON_LEN;
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2010-11-11 21:58:20 +00:00
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}
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2017-08-31 10:22:56 +00:00
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const struct osmo_gapk_format_desc fmt_rawpcm_s16le = {
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2010-11-11 21:58:20 +00:00
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.type = FMT_RAWPCM_S16LE,
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.codec_type = CODEC_PCM,
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.name = "rawpcm-s16le",
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.description = "Raw PCM samples Signed 16 bits little endian",
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2017-05-28 08:20:26 +00:00
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.frame_len = PCM_CANON_LEN,
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2010-11-11 21:58:20 +00:00
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.conv_from_canon = rawpcm_s16le_from_canon,
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.conv_to_canon = rawpcm_s16le_to_canon,
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};
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