| /* 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, |
| }; |