nuttx/drivers/audio/cs4344.h
Tiago Medicci Serrano d9169b84e4 audio/cs4344: Set the default sample rate to the lowest possible
According to the struct `mclk_rate_s`, set the default sample rate
to its lowest valid value. This prevents the underlying driver from
setting unsupported values.
2023-09-05 13:33:05 +08:00

103 lines
4.5 KiB
C

/****************************************************************************
* drivers/audio/cs4344.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __DRIVERS_AUDIO_CS4344_H
#define __DRIVERS_AUDIO_CS4344_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <pthread.h>
#include <mqueue.h>
#include <sys/param.h>
#include <nuttx/wqueue.h>
#include <nuttx/mutex.h>
#include <nuttx/fs/ioctl.h>
#ifdef CONFIG_AUDIO
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
#define CS4344_DEFAULT_SAMPRATE 16000 /* Initial sample rate */
#define CS4344_DEFAULT_NCHANNELS 1 /* Initial number of channels */
#define CS4344_DEFAULT_BPSAMP 16 /* Initial bits per sample */
/****************************************************************************
* Public Types
****************************************************************************/
struct cs4344_dev_s
{
/* We are an audio lower half driver (We are also the upper "half" of
* the CS4344 driver with respect to the board lower half driver).
*
* Terminology:
* Our "lower" half audio instances will be called dev for the publicly
* visible version and "priv" for the version that only this driver
* knows. From the point of view of this driver, it is the board lower
* "half" that is referred to as "lower".
*/
struct audio_lowerhalf_s dev; /* CS4344 audio lower half (this device) */
/* Our specific driver data goes here */
FAR struct i2s_dev_s *i2s; /* I2S driver to use */
struct dq_queue_s pendq; /* Queue of pending buffers to be sent */
struct dq_queue_s doneq; /* Queue of sent buffers to be returned */
struct file mq; /* Message queue for receiving messages */
char mqname[16]; /* Our message queue name */
pthread_t threadid; /* ID of our thread */
uint32_t bitrate; /* Actual programmed bit rate */
mutex_t pendlock; /* Protect pendq */
uint16_t samprate; /* Configured samprate (samples/sec) */
uint8_t nchannels; /* Number of channels (1 or 2) */
uint8_t bpsamp; /* Bits per sample (8 or 16) */
uint32_t mclk_freq; /* Master clock frequency */
volatile uint8_t inflight; /* Number of audio buffers in-flight */
bool running; /* True: Worker thread is running */
bool paused; /* True: Playing is paused */
bool mute; /* True: Output is muted */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
bool terminating; /* True: Stop requested */
#endif
bool reserved; /* True: Device is reserved */
volatile int result; /* The result of the last transfer */
};
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#endif /* CONFIG_AUDIO */
#endif /* __DRIVERS_AUDIO_CS4344_H */