76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
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/*
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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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*/
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#ifndef __AUDIO_PIPE_H__
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#define __AUDIO_PIPE_H__
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/**
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* Pipe Device
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*/
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#include <rtdevice.h>
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#ifndef RT_PIPE_BUFSZ
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#define PIPE_BUFSZ 512
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#else
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#define PIPE_BUFSZ RT_PIPE_BUFSZ
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#endif
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/* portal device */
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struct rt_audio_portal_device
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{
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struct rt_device parent;
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struct rt_device *write_dev;
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struct rt_device *read_dev;
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};
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enum rt_audio_pipe_flag
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{
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/* both read and write won't block */
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RT_PIPE_FLAG_NONBLOCK_RDWR = 0x00,
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/* read would block */
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RT_PIPE_FLAG_BLOCK_RD = 0x01,
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/* write would block */
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RT_PIPE_FLAG_BLOCK_WR = 0x02,
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/* write to this pipe will discard some data when the pipe is full.
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* When this flag is set, RT_PIPE_FLAG_BLOCK_WR will be ignored since write
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* operation will always be success. */
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RT_PIPE_FLAG_FORCE_WR = 0x04,
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};
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struct rt_audio_pipe
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{
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struct rt_device parent;
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/* ring buffer in pipe device */
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struct rt_ringbuffer ringbuffer;
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rt_int32_t flag;
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/* suspended list */
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rt_list_t suspended_read_list;
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rt_list_t suspended_write_list;
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struct rt_audio_portal_device *write_portal;
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struct rt_audio_portal_device *read_portal;
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};
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#define PIPE_CTRL_GET_SPACE 0x14 /**< get the remaining size of a pipe device */
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rt_err_t rt_audio_pipe_init(struct rt_audio_pipe *pipe,
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const char *name,
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rt_int32_t flag,
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rt_uint8_t *buf,
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rt_size_t size);
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rt_err_t rt_audio_pipe_detach(struct rt_audio_pipe *pipe);
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#ifdef RT_USING_HEAP
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rt_err_t rt_audio_pipe_create(const char *name, rt_int32_t flag, rt_size_t size);
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void rt_audio_pipe_destroy(struct rt_audio_pipe *pipe);
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#endif /* RT_USING_HEAP */
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#endif /* __AUDIO_PIPE_H__ */
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