1 /* 2 * Copyright © 2017 Intel Corporation 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 * Authors: 24 * Paul Kocialkowski <paul.kocialkowski@linux.intel.com> 25 */ 26 27 #ifndef IGT_AUDIO_H 28 #define IGT_AUDIO_H 29 30 #include "config.h" 31 32 #include <stdbool.h> 33 #include <stdint.h> 34 35 #include <alsa/asoundlib.h> 36 37 struct audio_signal; 38 39 struct audio_signal *audio_signal_init(int channels, int sampling_rate); 40 void audio_signal_fini(struct audio_signal *signal); 41 int audio_signal_add_frequency(struct audio_signal *signal, int frequency, 42 int channel); 43 void audio_signal_synthesize(struct audio_signal *signal); 44 void audio_signal_reset(struct audio_signal *signal); 45 void audio_signal_fill(struct audio_signal *signal, double *buffer, 46 size_t samples); 47 bool audio_signal_detect(struct audio_signal *signal, int sampling_rate, 48 int channel, const double *samples, size_t samples_len); 49 size_t audio_extract_channel_s32_le(double *dst, size_t dst_cap, 50 int32_t *src, size_t src_len, 51 int n_channels, int channel); 52 void audio_convert_to(void *dst, double *src, size_t len, 53 snd_pcm_format_t format); 54 int audio_create_wav_file_s32_le(const char *qualifier, uint32_t sample_rate, 55 uint16_t channels, char **path); 56 57 #endif 58