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

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/*
* File : audio.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017-05-09 Urey first version
*/
#include <stdio.h>
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include <drivers/audio.h>
#define AUDIO_DEBUG 0
#if AUDIO_DEBUG
#define AUDIO_DBG(...) printf("[AUDIO]:"),printf(__VA_ARGS__)
#else
#define AUDIO_DBG(...)
#endif
static rt_err_t _audio_send_replay_frame(struct rt_audio_device *audio)
{
rt_err_t result = RT_EOK;
rt_base_t level;
struct rt_audio_frame frame;
RT_ASSERT(audio != RT_NULL);
//check repaly queue is empty
if (rt_data_queue_peak(&audio->replay->queue, &frame.data_ptr, &frame.data_size) != RT_EOK)
{
AUDIO_DBG("TX queue is empty\n");
result = -RT_EEMPTY;
level = rt_hw_interrupt_disable();
audio->replay->activated = RT_FALSE;
rt_hw_interrupt_enable(level);
goto _exit;
}
if (audio->ops->transmit != RT_NULL)
{
AUDIO_DBG("audio transmit...\n");
if (audio->ops->transmit(audio, frame.data_ptr, RT_NULL, frame.data_size) != frame.data_size)
{
result = -RT_EBUSY;
goto _exit;
}
}
//pop the head frame...
rt_data_queue_pop(&audio->replay->queue, &frame.data_ptr, &frame.data_size, RT_WAITING_FOREVER);
_exit: return result;
}
static rt_err_t _audio_flush_replay_frame(struct rt_audio_device *audio)
{
struct rt_audio_frame frame;
if (audio->replay == RT_NULL)
return -RT_EIO;
while (rt_data_queue_peak(&audio->replay->queue, &frame.data_ptr, &frame.data_size) == RT_EOK)
{
//pop the head frame...
rt_data_queue_pop(&audio->replay->queue, &frame.data_ptr, &frame.data_size, RT_WAITING_FOREVER);
/* notify transmitted complete. */
if (audio->parent.tx_complete != RT_NULL)
audio->parent.tx_complete(&audio->parent, (void *) frame.data_ptr);
}
return RT_EOK;
}
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;
/* apply configuration */
if (audio->ops->init)
result = audio->ops->init(audio);
return result;
}
static rt_err_t _audio_dev_open(struct rt_device *dev, rt_uint16_t oflag)
{
rt_err_t result = RT_EOK;
rt_base_t level;
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)
{
AUDIO_DBG("open audio device ,oflag = %x\n",oflag);
if (audio->replay == RT_NULL)
{
struct rt_audio_replay *replay = (struct rt_audio_replay *) rt_malloc(sizeof(struct rt_audio_replay));
if (replay == RT_NULL)
{
AUDIO_DBG("request memory for replay error\n");
return -RT_ENOMEM;
}
//init queue for audio replay
rt_data_queue_init(&replay->queue, CFG_AUDIO_REPLAY_QUEUE_COUNT, CFG_AUDIO_REPLAY_QUEUE_COUNT / 2, RT_NULL);
replay->activated = RT_FALSE;
audio->replay = replay;
}
dev->open_flag |= RT_DEVICE_OFLAG_WRONLY;
}
if (oflag & RT_DEVICE_OFLAG_RDONLY)
{
if (audio->record == RT_NULL)
{
struct rt_audio_record *record = (struct rt_audio_record *) rt_malloc(sizeof(struct rt_audio_record));
if (record == RT_NULL)
{
AUDIO_DBG("request memory for record error\n");
return -RT_ENOMEM;
}
//init pipe for record
{
rt_size_t size = CFG_AUDIO_RECORD_PIPE_SIZE;
rt_uint8_t *buf = rt_malloc(CFG_AUDIO_RECORD_PIPE_SIZE);
if (buf == RT_NULL)
{
rt_free(record);
AUDIO_DBG("request pipe memory error\n");
return -RT_ENOMEM;
}
rt_pipe_init(&record->pipe, "recpipe", RT_PIPE_FLAG_FORCE_WR | RT_PIPE_FLAG_BLOCK_RD, buf,
CFG_AUDIO_RECORD_PIPE_SIZE);
}
record->activated = RT_FALSE;
audio->record = record;
}
//open record pipe
if (audio->record != RT_NULL)
{
rt_device_open(RT_DEVICE(&audio->record->pipe), RT_DEVICE_OFLAG_RDONLY);
}
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;
//shutdown the lower device
if (audio->ops->shutdown != RT_NULL)
audio->ops->shutdown(audio);
if (dev->open_flag & RT_DEVICE_OFLAG_WRONLY)
{
struct rt_audio_frame frame;
//stop replay stream
audio->ops->stop(audio, AUDIO_STREAM_REPLAY);
//flush all frame
while (rt_data_queue_peak(&audio->replay->queue, &frame.data_ptr, &frame.data_size) == RT_EOK)
{
//pop the head frame...
rt_data_queue_pop(&audio->replay->queue, &frame.data_ptr, &frame.data_size, RT_WAITING_FOREVER);
/* notify transmitted complete. */
if (audio->parent.tx_complete != RT_NULL)
audio->parent.tx_complete(&audio->parent, (void *) frame.data_ptr);
}
dev->open_flag &= ~RT_DEVICE_OFLAG_WRONLY;
}
if (dev->open_flag & RT_DEVICE_OFLAG_RDONLY)
{
//stop record stream
audio->ops->stop(audio, AUDIO_STREAM_RECORD);
//close record pipe
if (audio->record != RT_NULL)
rt_device_close(RT_DEVICE(&audio->record->pipe));
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)
{
rt_err_t result = RT_EOK;
rt_base_t level;
struct rt_audio_device *audio;
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;
AUDIO_DBG("audio write : pos = %d,buffer = %x,size = %d\n",pos,(rt_uint32_t)buffer,size);
//push a new frame to tx queue
{
result = rt_data_queue_push(&audio->replay->queue, buffer, size,
RT_WAITING_FOREVER);
if (result != RT_EOK)
{
AUDIO_DBG("TX frame queue push error\n");
rt_set_errno(-RT_EFULL);
return 0;
}
}
//check tx state...
level = rt_hw_interrupt_disable();
if (audio->replay->activated != RT_TRUE)
{
audio->replay->activated = RT_TRUE;
rt_hw_interrupt_enable(level);
_audio_send_replay_frame(audio);
}
return size;
}
static rt_err_t _audio_dev_control(struct rt_device *dev, rt_uint8_t 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;
AUDIO_DBG("AUDIO_CTL_GETCAPS: main_type = %d,sub_type = %d\n",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;
AUDIO_DBG("AUDIO_CTL_CONFIGURE: main_type = %d,sub_type = %d\n",caps->main_type,caps->sub_type);
if (audio->ops->configure != RT_NULL)
{
result = audio->ops->configure(audio, caps);
}
}
break;
case AUDIO_CTL_SHUTDOWN:
{
AUDIO_DBG("AUDIO_CTL_SHUTDOWN\n");
if (audio->ops->shutdown != RT_NULL)
result = audio->ops->shutdown(audio);
//flush replay frame...
_audio_flush_replay_frame(audio);
}
break;
case AUDIO_CTL_START:
{
int stream = *(int *) args;
AUDIO_DBG("AUDIO_CTL_START: stream = %d\n",stream);
if (audio->ops->start != RT_NULL)
result = audio->ops->start(audio, stream);
}
break;
case AUDIO_CTL_STOP:
{
int stream = *(int *) args;
AUDIO_DBG("AUDIO_CTL_STOP: stream = %d\n",stream);
if (audio->ops->start != RT_NULL)
result = audio->ops->stop(audio, stream);
if (stream == AUDIO_STREAM_REPLAY)
{
_audio_flush_replay_frame(audio);
}
}
break;
case AUDIO_CTL_PAUSE:
{
int stream = *(int *) args;
AUDIO_DBG("AUDIO_CTL_PAUSE: stream = %d\n",stream);
if (audio->ops->start != RT_NULL)
result = audio->ops->suspend(audio, stream);
}
break;
case AUDIO_CTL_RESUME:
{
int stream = *(int *) args;
AUDIO_DBG("AUDIO_CTL_RESUME: stream = %d\n",stream);
if (audio->ops->start != RT_NULL)
result = audio->ops->resume(audio, stream);
//resume tx frame...
if (stream == AUDIO_STREAM_REPLAY)
_audio_send_replay_frame(audio);
}
break;
case AUDIO_CTL_ALLOCBUFFER:
{
struct rt_audio_buf_desc *desc = (struct rt_audio_buf_desc *) args;
if (desc)
{
desc->data_size = AUDIO_DEVICE_DECODE_MP_BLOCK_SZ * 2;
desc->data_ptr = rt_mp_alloc(&audio->mp, RT_WAITING_FOREVER);
result = RT_EOK;
}
else result = -RT_EIO;
}
break;
case AUDIO_CTL_FREEBUFFER:
{
rt_uint8_t *data_ptr = (rt_uint8_t *) args;
if (data_ptr)
rt_mp_free(data_ptr);
}
break;
default:
result = audio->ops->control(audio, cmd, args);
break;
}
return result;
}
rt_err_t rt_audio_register(struct rt_audio_device *audio, const char *name, rt_uint32_t flag, void *data)
{
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;
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;
device->user_data = data;
//init memory pool for replay
{
rt_uint8_t *mempool = rt_malloc(AUDIO_DEVICE_DECODE_MP_SZ);
rt_mp_init(&audio->mp, "adu_mp", mempool, AUDIO_DEVICE_DECODE_MP_SZ,
AUDIO_DEVICE_DECODE_MP_BLOCK_SZ * 2);
}
/* register a character device */
return rt_device_register(device, name, flag | RT_DEVICE_FLAG_REMOVABLE);
}
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;
}
rt_uint32_t rt_audio_format_to_bits(rt_uint32_t format)
{
switch (format)
{
case AUDIO_FMT_PCM_U8:
case AUDIO_FMT_PCM_S8:
return 8;
case AUDIO_FMT_PCM_S16_LE:
case AUDIO_FMT_PCM_S16_BE:
case AUDIO_FMT_PCM_U16_LE:
case AUDIO_FMT_PCM_U16_BE:
return 16;
default:
return 32;
};
}
void rt_audio_tx_complete(struct rt_audio_device *audio, rt_uint8_t *pbuf)
{
rt_err_t result;
AUDIO_DBG("audio tx complete ptr=%x...\n",(rt_uint32_t)pbuf);
//try to send all frame
do
{
result = _audio_send_replay_frame(audio);
} while (result == RT_EOK);
/* notify transmitted complete. */
if (audio->parent.tx_complete != RT_NULL)
audio->parent.tx_complete(&audio->parent, (void *) pbuf);
}
void rt_audio_rx_done(struct rt_audio_device *audio, rt_uint8_t *pbuf, rt_size_t len)
{
rt_err_t result = RT_EOK;
//save data to record pipe
rt_device_write(RT_DEVICE(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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