rockbox/firmware/target/hosted/pcm-alsa.h
Solomon Peachy 46e357f1bb ALSA: Further rework:
* Get rid of non-async (ie tick task) mode due to inherent brokenness
 * Get rid of nonblock mode; we never write if buffers aren't sufficient
 * Move driver init into pcm_open() instead of pcm_init()
 * Much better underrun handling
 * Better error handling in some situations
 * Add in recording functionality
 * Use smaller audio buffers to avoid glitching
 * Don't start audio buffer with silence
 * Allow device name to be overridden by target

Recording portions based on work done by Lorenzo Miori in g#633

Change-Id: I0197bdc1749c28109eb79def1e6a3e1d62d8cef3
2020-10-23 17:48:51 -04:00

39 lines
1.6 KiB
C

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright (C) 2016 Amaury Pouly
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __PCM_ALSA_RB_H__
#define __PCM_ALSA_RB_H__
#include <config.h>
#if defined(SONY_NWZ_LINUX) || defined(HAVE_FIIO_LINUX_CODEC)
/* Set the PCM volume in dB: each sample with have this volume applied digitally
* before being sent to ALSA. Volume must satisfy -43 <= dB <= 0 */
void pcm_alsa_set_digital_volume(int vol_db_l, int vol_db_r);
#endif
/* These two should be invoked in your audiohw_preinit() call! */
void pcm_alsa_set_playback_device(const char *device);
#if defined(HAVE_RECORDING)
void pcm_alsa_set_capture_device(const char *device);
#endif
int pcm_alsa_get_rate(void);
#endif /* __PCM_ALSA_RB_H__ */