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andy
2025-06-13 14:38:32 +08:00
parent caf2d9f0c5
commit 160f9f8201
1809 changed files with 648100 additions and 10 deletions
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9
riscv/rtthread/components/drivers/audio/SConscript Executable file
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from building import *
cwd = GetCurrentDir()
src = Glob('*.c')
CPPPATH = [cwd]
group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_AUDIO'], CPPPATH = CPPPATH)
Return('group')

612
riscv/rtthread/components/drivers/audio/audio.c Executable file
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/*
* Copyright (c) 2006-2023, 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_peek(&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 */
rt_memset(&buf_info->buffer[audio->replay->pos], 0, dst_size);
audio->replay->pos += dst_size;
audio->replay->pos %= buf_info->total_size;
}
else
{
rt_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_peek(&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));
rt_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;
rt_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;
rt_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_ssize_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_ssize_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);
rt_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));
rt_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);
}

296
riscv/rtthread/components/drivers/audio/audio_pipe.c Executable file
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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2012-09-30 Bernard first version.
*/
#include <rthw.h>
#include <rtdevice.h>
#include "audio_pipe.h"
static void _rt_pipe_resume_writer(struct rt_audio_pipe *pipe)
{
if (!rt_list_isempty(&pipe->suspended_write_list))
{
rt_thread_t thread;
RT_ASSERT(pipe->flag & RT_PIPE_FLAG_BLOCK_WR);
/* get suspended thread */
thread = RT_THREAD_LIST_NODE_ENTRY(pipe->suspended_write_list.next);
/* resume the write thread */
rt_thread_resume(thread);
rt_schedule();
}
}
static rt_ssize_t rt_pipe_read(rt_device_t dev,
rt_off_t pos,
void *buffer,
rt_size_t size)
{
rt_base_t level;
rt_thread_t thread;
struct rt_audio_pipe *pipe;
rt_size_t read_nbytes;
pipe = (struct rt_audio_pipe *)dev;
RT_ASSERT(pipe != RT_NULL);
if (!(pipe->flag & RT_PIPE_FLAG_BLOCK_RD))
{
level = rt_hw_interrupt_disable();
read_nbytes = rt_ringbuffer_get(&(pipe->ringbuffer), (rt_uint8_t *)buffer, size);
/* if the ringbuffer is empty, there won't be any writer waiting */
if (read_nbytes)
_rt_pipe_resume_writer(pipe);
rt_hw_interrupt_enable(level);
return read_nbytes;
}
thread = rt_thread_self();
/* current context checking */
RT_DEBUG_NOT_IN_INTERRUPT;
do
{
level = rt_hw_interrupt_disable();
read_nbytes = rt_ringbuffer_get(&(pipe->ringbuffer), (rt_uint8_t *)buffer, size);
if (read_nbytes == 0)
{
rt_thread_suspend(thread);
/* waiting on suspended read list */
rt_list_insert_before(&(pipe->suspended_read_list),
&RT_THREAD_LIST_NODE(thread));
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
_rt_pipe_resume_writer(pipe);
rt_hw_interrupt_enable(level);
break;
}
}
while (read_nbytes == 0);
return read_nbytes;
}
static void _rt_pipe_resume_reader(struct rt_audio_pipe *pipe)
{
if (pipe->parent.rx_indicate)
pipe->parent.rx_indicate(&pipe->parent,
rt_ringbuffer_data_len(&pipe->ringbuffer));
if (!rt_list_isempty(&pipe->suspended_read_list))
{
rt_thread_t thread;
RT_ASSERT(pipe->flag & RT_PIPE_FLAG_BLOCK_RD);
/* get suspended thread */
thread = RT_THREAD_LIST_NODE_ENTRY(pipe->suspended_read_list.next);
/* resume the read thread */
rt_thread_resume(thread);
rt_schedule();
}
}
static rt_ssize_t rt_pipe_write(rt_device_t dev,
rt_off_t pos,
const void *buffer,
rt_size_t size)
{
rt_base_t level;
rt_thread_t thread;
struct rt_audio_pipe *pipe;
rt_size_t write_nbytes;
pipe = (struct rt_audio_pipe *)dev;
RT_ASSERT(pipe != RT_NULL);
if ((pipe->flag & RT_PIPE_FLAG_FORCE_WR) ||
!(pipe->flag & RT_PIPE_FLAG_BLOCK_WR))
{
level = rt_hw_interrupt_disable();
if (pipe->flag & RT_PIPE_FLAG_FORCE_WR)
write_nbytes = rt_ringbuffer_put_force(&(pipe->ringbuffer),
(const rt_uint8_t *)buffer, size);
else
write_nbytes = rt_ringbuffer_put(&(pipe->ringbuffer),
(const rt_uint8_t *)buffer, size);
_rt_pipe_resume_reader(pipe);
rt_hw_interrupt_enable(level);
return write_nbytes;
}
thread = rt_thread_self();
/* current context checking */
RT_DEBUG_NOT_IN_INTERRUPT;
do
{
level = rt_hw_interrupt_disable();
write_nbytes = rt_ringbuffer_put(&(pipe->ringbuffer), (const rt_uint8_t *)buffer, size);
if (write_nbytes == 0)
{
/* pipe full, waiting on suspended write list */
rt_thread_suspend(thread);
/* waiting on suspended read list */
rt_list_insert_before(&(pipe->suspended_write_list),
&RT_THREAD_LIST_NODE(thread));
rt_hw_interrupt_enable(level);
rt_schedule();
}
else
{
_rt_pipe_resume_reader(pipe);
rt_hw_interrupt_enable(level);
break;
}
}
while (write_nbytes == 0);
return write_nbytes;
}
static rt_err_t rt_pipe_control(rt_device_t dev, int cmd, void *args)
{
struct rt_audio_pipe *pipe;
pipe = (struct rt_audio_pipe *)dev;
if (cmd == PIPE_CTRL_GET_SPACE && args)
*(rt_size_t *)args = rt_ringbuffer_space_len(&pipe->ringbuffer);
return RT_EOK;
}
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops audio_pipe_ops =
{
RT_NULL,
RT_NULL,
RT_NULL,
rt_pipe_read,
rt_pipe_write,
rt_pipe_control
};
#endif
/**
* This function will initialize a pipe device and put it under control of
* resource management.
*
* @param pipe the pipe device
* @param name the name of pipe device
* @param flag the attribute of the pipe device
* @param buf the buffer of pipe device
* @param size the size of pipe device buffer
*
* @return the operation status, RT_EOK on successful
*/
rt_err_t rt_audio_pipe_init(struct rt_audio_pipe *pipe,
const char *name,
rt_int32_t flag,
rt_uint8_t *buf,
rt_size_t size)
{
RT_ASSERT(pipe);
RT_ASSERT(buf);
/* initialize suspended list */
rt_list_init(&pipe->suspended_read_list);
rt_list_init(&pipe->suspended_write_list);
/* initialize ring buffer */
rt_ringbuffer_init(&pipe->ringbuffer, buf, size);
pipe->flag = flag;
/* create pipe */
pipe->parent.type = RT_Device_Class_Pipe;
#ifdef RT_USING_DEVICE_OPS
pipe->parent.ops = &audio_pipe_ops;
#else
pipe->parent.init = RT_NULL;
pipe->parent.open = RT_NULL;
pipe->parent.close = RT_NULL;
pipe->parent.read = rt_pipe_read;
pipe->parent.write = rt_pipe_write;
pipe->parent.control = rt_pipe_control;
#endif
return rt_device_register(&(pipe->parent), name, RT_DEVICE_FLAG_RDWR);
}
/**
* This function will detach a pipe device from resource management
*
* @param pipe the pipe device
*
* @return the operation status, RT_EOK on successful
*/
rt_err_t rt_audio_pipe_detach(struct rt_audio_pipe *pipe)
{
return rt_device_unregister(&pipe->parent);
}
#ifdef RT_USING_HEAP
rt_err_t rt_audio_pipe_create(const char *name, rt_int32_t flag, rt_size_t size)
{
rt_uint8_t *rb_memptr = RT_NULL;
struct rt_audio_pipe *pipe = RT_NULL;
/* get aligned size */
size = RT_ALIGN(size, RT_ALIGN_SIZE);
pipe = (struct rt_audio_pipe *)rt_calloc(1, sizeof(struct rt_audio_pipe));
if (pipe == RT_NULL)
return -RT_ENOMEM;
/* create ring buffer of pipe */
rb_memptr = (rt_uint8_t *)rt_malloc(size);
if (rb_memptr == RT_NULL)
{
rt_free(pipe);
return -RT_ENOMEM;
}
return rt_audio_pipe_init(pipe, name, flag, rb_memptr, size);
}
void rt_audio_pipe_destroy(struct rt_audio_pipe *pipe)
{
if (pipe == RT_NULL)
return;
/* un-register pipe device */
rt_audio_pipe_detach(pipe);
/* release memory */
rt_free(pipe->ringbuffer.buffer_ptr);
rt_free(pipe);
return;
}
#endif /* RT_USING_HEAP */

75
riscv/rtthread/components/drivers/audio/audio_pipe.h Executable file
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@@ -0,0 +1,75 @@
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
*/
#ifndef __AUDIO_PIPE_H__
#define __AUDIO_PIPE_H__
/**
* Pipe Device
*/
#include <rtdevice.h>
#ifndef RT_PIPE_BUFSZ
#define PIPE_BUFSZ 512
#else
#define PIPE_BUFSZ RT_PIPE_BUFSZ
#endif
/* portal device */
struct rt_audio_portal_device
{
struct rt_device parent;
struct rt_device *write_dev;
struct rt_device *read_dev;
};
enum rt_audio_pipe_flag
{
/* both read and write won't block */
RT_PIPE_FLAG_NONBLOCK_RDWR = 0x00,
/* read would block */
RT_PIPE_FLAG_BLOCK_RD = 0x01,
/* write would block */
RT_PIPE_FLAG_BLOCK_WR = 0x02,
/* write to this pipe will discard some data when the pipe is full.
* When this flag is set, RT_PIPE_FLAG_BLOCK_WR will be ignored since write
* operation will always be success. */
RT_PIPE_FLAG_FORCE_WR = 0x04,
};
struct rt_audio_pipe
{
struct rt_device parent;
/* ring buffer in pipe device */
struct rt_ringbuffer ringbuffer;
rt_int32_t flag;
/* suspended list */
rt_list_t suspended_read_list;
rt_list_t suspended_write_list;
struct rt_audio_portal_device *write_portal;
struct rt_audio_portal_device *read_portal;
};
#define PIPE_CTRL_GET_SPACE 0x14 /**< get the remaining size of a pipe device */
rt_err_t rt_audio_pipe_init(struct rt_audio_pipe *pipe,
const char *name,
rt_int32_t flag,
rt_uint8_t *buf,
rt_size_t size);
rt_err_t rt_audio_pipe_detach(struct rt_audio_pipe *pipe);
#ifdef RT_USING_HEAP
rt_err_t rt_audio_pipe_create(const char *name, rt_int32_t flag, rt_size_t size);
void rt_audio_pipe_destroy(struct rt_audio_pipe *pipe);
#endif /* RT_USING_HEAP */
#endif /* __AUDIO_PIPE_H__ */