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rt-thread/components/drivers/audio/audio.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017-05-09 Urey first version
* 2019-07-09 Zero-Free improve device ops interface and data flows
*/
#include <stdio.h>
#include <string.h>
#include <rthw.h>
#include <rtdevice.h>
#define DBG_TAG "audio"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
enum
{
REPLAY_EVT_NONE = 0x00,
REPLAY_EVT_START = 0x01,
REPLAY_EVT_STOP = 0x02,
};
static rt_err_t _audio_send_replay_frame(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
rt_uint8_t *data;
rt_size_t dst_size, src_size;
rt_uint16_t position, remain_bytes = 0, index = 0;
struct rt_audio_buf_info *buf_info;
RT_ASSERT(audio != RT_NULL);
buf_info = &audio->replay->buf_info;
/* save current pos */
position = audio->replay->pos;
dst_size = buf_info->block_size;
/* check replay queue is empty */
if (rt_data_queue_peak(&audio->replay->queue, (const void **)&data, &src_size) != RT_EOK)
{
/* ack stop event */
if (audio->replay->event & REPLAY_EVT_STOP)
rt_completion_done(&audio->replay->cmp);
/* send zero frames */
memset(&buf_info->buffer[audio->replay->pos], 0, dst_size);
audio->replay->pos += dst_size;
audio->replay->pos %= buf_info->total_size;
}
else
{
memset(&buf_info->buffer[audio->replay->pos], 0, dst_size);
/* copy data from memory pool to hardware device fifo */
while (index < dst_size)
{
result = rt_data_queue_peak(&audio->replay->queue, (const void **)&data, &src_size);
if (result != RT_EOK)
{
LOG_D("under run %d, remain %d", audio->replay->pos, remain_bytes);
audio->replay->pos -= remain_bytes;
audio->replay->pos += dst_size;
audio->replay->pos %= buf_info->total_size;
audio->replay->read_index = 0;
result = -RT_EEMPTY;
break;
}
remain_bytes = MIN((dst_size - index), (src_size - audio->replay->read_index));
memcpy(&buf_info->buffer[audio->replay->pos],
&data[audio->replay->read_index], remain_bytes);
index += remain_bytes;
audio->replay->read_index += remain_bytes;
audio->replay->pos += remain_bytes;
audio->replay->pos %= buf_info->total_size;
if (audio->replay->read_index == src_size)
{
/* free memory */
audio->replay->read_index = 0;
rt_data_queue_pop(&audio->replay->queue, (const void **)&data, &src_size, RT_WAITING_NO);
rt_mp_free(data);
/* notify transmitted complete. */
if (audio->parent.tx_complete != RT_NULL)
audio->parent.tx_complete(&audio->parent, (void *)data);
}
}
}
if (audio->ops->transmit != RT_NULL)
{
if (audio->ops->transmit(audio, &buf_info->buffer[position], RT_NULL, dst_size) != dst_size)
result = -RT_ERROR;
}
return result;
}
static rt_err_t _audio_flush_replay_frame(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
if (audio->replay->write_index)
{
result = rt_data_queue_push(&audio->replay->queue,
(const void **)audio->replay->write_data,
audio->replay->write_index,
RT_WAITING_FOREVER);
audio->replay->write_index = 0;
}
return result;
}
static rt_err_t _aduio_replay_start(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
if (audio->replay->activated != RT_TRUE)
{
/* start playback hardware device */
if (audio->ops->start)
result = audio->ops->start(audio, AUDIO_STREAM_REPLAY);
audio->replay->activated = RT_TRUE;
LOG_D("start audio replay device");
}
return result;
}
static rt_err_t _aduio_replay_stop(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
if (audio->replay->activated == RT_TRUE)
{
/* flush replay remian frames */
_audio_flush_replay_frame(audio);
/* notify irq(or thread) to stop the data transmission */
audio->replay->event |= REPLAY_EVT_STOP;
/* waiting for the remaining data transfer to complete */
rt_completion_init(&audio->replay->cmp);
rt_completion_wait(&audio->replay->cmp, RT_WAITING_FOREVER);
audio->replay->event &= ~REPLAY_EVT_STOP;
/* stop playback hardware device */
if (audio->ops->stop)
result = audio->ops->stop(audio, AUDIO_STREAM_REPLAY);
audio->replay->activated = RT_FALSE;
LOG_D("stop audio replay device");
}
return result;
}
static rt_err_t _audio_record_start(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
if (audio->record->activated != RT_TRUE)
{
/* open audio record pipe */
rt_device_open(RT_DEVICE(&audio->record->pipe), RT_DEVICE_OFLAG_RDONLY);
/* start record hardware device */
if (audio->ops->start)
result = audio->ops->start(audio, AUDIO_STREAM_RECORD);
audio->record->activated = RT_TRUE;
LOG_D("start audio record device");
}
return result;
}
static rt_err_t _audio_record_stop(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
if (audio->record->activated == RT_TRUE)
{
/* stop record hardware device */
if (audio->ops->stop)
result = audio->ops->stop(audio, AUDIO_STREAM_RECORD);
/* close audio record pipe */
rt_device_close(RT_DEVICE(&audio->record->pipe));
audio->record->activated = RT_FALSE;
LOG_D("stop audio record device");
}
return result;
}
static rt_err_t _audio_dev_init(struct rt_device *dev)
{
rt_err_t result = RT_EOK;
struct rt_audio_device *audio;
RT_ASSERT(dev != RT_NULL);
audio = (struct rt_audio_device *) dev;
/* initialize replay & record */
audio->replay = RT_NULL;
audio->record = RT_NULL;
/* initialize replay */
if (dev->flag & RT_DEVICE_FLAG_WRONLY)
{
struct rt_audio_replay *replay = (struct rt_audio_replay *) rt_malloc(sizeof(struct rt_audio_replay));
if (replay == RT_NULL)
return -RT_ENOMEM;
memset(replay, 0, sizeof(struct rt_audio_replay));
/* init memory pool for replay */
replay->mp = rt_mp_create("adu_mp", RT_AUDIO_REPLAY_MP_BLOCK_COUNT, RT_AUDIO_REPLAY_MP_BLOCK_SIZE);
if (replay->mp == RT_NULL)
{
rt_free(replay);
LOG_E("create memory pool for replay failed");
return -RT_ENOMEM;
}
/* init queue for audio replay */
rt_data_queue_init(&replay->queue, CFG_AUDIO_REPLAY_QUEUE_COUNT, 0, RT_NULL);
/* init mutex lock for audio replay */
rt_mutex_init(&replay->lock, "replay", RT_IPC_FLAG_PRIO);
replay->activated = RT_FALSE;
audio->replay = replay;
}
/* initialize record */
if (dev->flag & RT_DEVICE_FLAG_RDONLY)
{
struct rt_audio_record *record = (struct rt_audio_record *) rt_malloc(sizeof(struct rt_audio_record));
rt_uint8_t *buffer;
if (record == RT_NULL)
return -RT_ENOMEM;
memset(record, 0, sizeof(struct rt_audio_record));
/* init pipe for record*/
buffer = rt_malloc(RT_AUDIO_RECORD_PIPE_SIZE);
if (buffer == RT_NULL)
{
rt_free(record);
LOG_E("malloc memory for for record pipe failed");
return -RT_ENOMEM;
}
rt_audio_pipe_init(&record->pipe, "record",
(rt_int32_t)(RT_PIPE_FLAG_FORCE_WR | RT_PIPE_FLAG_BLOCK_RD),
buffer,
RT_AUDIO_RECORD_PIPE_SIZE);
record->activated = RT_FALSE;
audio->record = record;
}
/* initialize hardware configuration */
if (audio->ops->init)
audio->ops->init(audio);
/* get replay buffer information */
if (audio->ops->buffer_info)
audio->ops->buffer_info(audio, &audio->replay->buf_info);
return result;
}
static rt_err_t _audio_dev_open(struct rt_device *dev, rt_uint16_t oflag)
{
struct rt_audio_device *audio;
RT_ASSERT(dev != RT_NULL);
audio = (struct rt_audio_device *) dev;
/* check device flag with the open flag */
if ((oflag & RT_DEVICE_OFLAG_RDONLY) && !(dev->flag & RT_DEVICE_FLAG_RDONLY))
return -RT_EIO;
if ((oflag & RT_DEVICE_OFLAG_WRONLY) && !(dev->flag & RT_DEVICE_FLAG_WRONLY))
return -RT_EIO;
/* get open flags */
dev->open_flag = oflag & 0xff;
/* initialize the Rx/Tx structure according to open flag */
if (oflag & RT_DEVICE_OFLAG_WRONLY)
{
if (audio->replay->activated != RT_TRUE)
{
LOG_D("open audio replay device, oflag = %x\n", oflag);
audio->replay->write_index = 0;
audio->replay->read_index = 0;
audio->replay->pos = 0;
audio->replay->event = REPLAY_EVT_NONE;
}
dev->open_flag |= RT_DEVICE_OFLAG_WRONLY;
}
if (oflag & RT_DEVICE_OFLAG_RDONLY)
{
/* open record pipe */
if (audio->record->activated != RT_TRUE)
{
LOG_D("open audio record device ,oflag = %x\n", oflag);
_audio_record_start(audio);
audio->record->activated = RT_TRUE;
}
dev->open_flag |= RT_DEVICE_OFLAG_RDONLY;
}
return RT_EOK;
}
static rt_err_t _audio_dev_close(struct rt_device *dev)
{
struct rt_audio_device *audio;
RT_ASSERT(dev != RT_NULL);
audio = (struct rt_audio_device *) dev;
if (dev->open_flag & RT_DEVICE_OFLAG_WRONLY)
{
/* stop replay stream */
_aduio_replay_stop(audio);
dev->open_flag &= ~RT_DEVICE_OFLAG_WRONLY;
}
if (dev->open_flag & RT_DEVICE_OFLAG_RDONLY)
{
/* stop record stream */
_audio_record_stop(audio);
dev->open_flag &= ~RT_DEVICE_OFLAG_RDONLY;
}
return RT_EOK;
}
static rt_size_t _audio_dev_read(struct rt_device *dev, rt_off_t pos, void *buffer, rt_size_t size)
{
struct rt_audio_device *audio;
RT_ASSERT(dev != RT_NULL);
audio = (struct rt_audio_device *) dev;
if (!(dev->open_flag & RT_DEVICE_OFLAG_RDONLY) || (audio->record == RT_NULL))
return 0;
return rt_device_read(RT_DEVICE(&audio->record->pipe), pos, buffer, size);
}
static rt_size_t _audio_dev_write(struct rt_device *dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
struct rt_audio_device *audio;
rt_uint8_t *ptr;
rt_uint16_t block_size, remain_bytes, index = 0;
RT_ASSERT(dev != RT_NULL);
audio = (struct rt_audio_device *) dev;
if (!(dev->open_flag & RT_DEVICE_OFLAG_WRONLY) || (audio->replay == RT_NULL))
return 0;
/* push a new frame to replay data queue */
ptr = (rt_uint8_t *)buffer;
block_size = RT_AUDIO_REPLAY_MP_BLOCK_SIZE;
rt_mutex_take(&audio->replay->lock, RT_WAITING_FOREVER);
while (index < size)
{
/* request buffer from replay memory pool */
if (audio->replay->write_index % block_size == 0)
{
audio->replay->write_data = rt_mp_alloc(audio->replay->mp, RT_WAITING_FOREVER);
memset(audio->replay->write_data, 0, block_size);
}
/* copy data to replay memory pool */
remain_bytes = MIN((block_size - audio->replay->write_index), (size - index));
memcpy(&audio->replay->write_data[audio->replay->write_index], &ptr[index], remain_bytes);
index += remain_bytes;
audio->replay->write_index += remain_bytes;
audio->replay->write_index %= block_size;
if (audio->replay->write_index == 0)
{
rt_data_queue_push(&audio->replay->queue,
audio->replay->write_data,
block_size,
RT_WAITING_FOREVER);
}
}
rt_mutex_release(&audio->replay->lock);
/* check replay state */
if (audio->replay->activated != RT_TRUE)
{
_aduio_replay_start(audio);
audio->replay->activated = RT_TRUE;
}
return index;
}
static rt_err_t _audio_dev_control(struct rt_device *dev, int cmd, void *args)
{
rt_err_t result = RT_EOK;
struct rt_audio_device *audio;
RT_ASSERT(dev != RT_NULL);
audio = (struct rt_audio_device *) dev;
/* dev stat...*/
switch (cmd)
{
case AUDIO_CTL_GETCAPS:
{
struct rt_audio_caps *caps = (struct rt_audio_caps *) args;
LOG_D("AUDIO_CTL_GETCAPS: main_type = %d,sub_type = %d", caps->main_type, caps->sub_type);
if (audio->ops->getcaps != RT_NULL)
{
result = audio->ops->getcaps(audio, caps);
}
break;
}
case AUDIO_CTL_CONFIGURE:
{
struct rt_audio_caps *caps = (struct rt_audio_caps *) args;
LOG_D("AUDIO_CTL_CONFIGURE: main_type = %d,sub_type = %d", caps->main_type, caps->sub_type);
if (audio->ops->configure != RT_NULL)
{
result = audio->ops->configure(audio, caps);
}
break;
}
case AUDIO_CTL_START:
{
int stream = *(int *) args;
LOG_D("AUDIO_CTL_START: stream = %d", stream);
if (stream == AUDIO_STREAM_REPLAY)
{
result = _aduio_replay_start(audio);
}
else
{
result = _audio_record_start(audio);
}
break;
}
case AUDIO_CTL_STOP:
{
int stream = *(int *) args;
LOG_D("AUDIO_CTL_STOP: stream = %d", stream);
if (stream == AUDIO_STREAM_REPLAY)
{
result = _aduio_replay_stop(audio);
}
else
{
result = _audio_record_stop(audio);
}
break;
}
default:
break;
}
return result;
}
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops audio_ops =
{
_audio_dev_init,
_audio_dev_open,
_audio_dev_close,
_audio_dev_read,
_audio_dev_write,
_audio_dev_control
};
#endif
rt_err_t rt_audio_register(struct rt_audio_device *audio, const char *name, rt_uint32_t flag, void *data)
{
rt_err_t result = RT_EOK;
struct rt_device *device;
RT_ASSERT(audio != RT_NULL);
device = &(audio->parent);
device->type = RT_Device_Class_Sound;
device->rx_indicate = RT_NULL;
device->tx_complete = RT_NULL;
#ifdef RT_USING_DEVICE_OPS
device->ops = &audio_ops;
#else
device->init = _audio_dev_init;
device->open = _audio_dev_open;
device->close = _audio_dev_close;
device->read = _audio_dev_read;
device->write = _audio_dev_write;
device->control = _audio_dev_control;
#endif
device->user_data = data;
/* register a character device */
result = rt_device_register(device, name, flag | RT_DEVICE_FLAG_REMOVABLE);
/* initialize audio device */
if (result == RT_EOK)
result = rt_device_init(device);
return result;
}
int rt_audio_samplerate_to_speed(rt_uint32_t bitValue)
{
int speed = 0;
switch (bitValue)
{
case AUDIO_SAMP_RATE_8K:
speed = 8000;
break;
case AUDIO_SAMP_RATE_11K:
speed = 11052;
break;
case AUDIO_SAMP_RATE_16K:
speed = 16000;
break;
case AUDIO_SAMP_RATE_22K:
speed = 22050;
break;
case AUDIO_SAMP_RATE_32K:
speed = 32000;
break;
case AUDIO_SAMP_RATE_44K:
speed = 44100;
break;
case AUDIO_SAMP_RATE_48K:
speed = 48000;
break;
case AUDIO_SAMP_RATE_96K:
speed = 96000;
break;
case AUDIO_SAMP_RATE_128K:
speed = 128000;
break;
case AUDIO_SAMP_RATE_160K:
speed = 160000;
break;
case AUDIO_SAMP_RATE_172K:
speed = 176400;
break;
case AUDIO_SAMP_RATE_192K:
speed = 192000;
break;
default:
break;
}
return speed;
}
void rt_audio_tx_complete(struct rt_audio_device *audio)
{
/* try to send next frame */
_audio_send_replay_frame(audio);
}
void rt_audio_rx_done(struct rt_audio_device *audio, rt_uint8_t *pbuf, rt_size_t len)
{
/* save data to record pipe */
rt_device_write(RT_DEVICE(&audio->record->pipe), 0, pbuf, len);
/* invoke callback */
if (audio->parent.rx_indicate != RT_NULL)
audio->parent.rx_indicate(&audio->parent, len);
}
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