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