/*
* Copyright (c) 2014 Jiri Svoboda
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup hdaudio
* @{
*/
/** @file High Definition Audio stream
*/
#ifndef STREAM_H
#define STREAM_H
#include "hdaudio.h"
#include "spec/bdl.h"
typedef enum {
/** Input Stream */
sdir_input,
/** Output Stream */
sdir_output,
/** Bidirectional Stream */
sdir_bidi
} hda_stream_dir_t;
typedef struct hda_stream_buffers {
/** Number of buffers */
size_t nbuffers;
/** Buffer size */
size_t bufsize;
/** Buffer Descriptor List */
hda_buffer_desc_t *bdl;
/** Physical address of BDL */
uintptr_t bdl_phys;
/** Buffers */
void **buf;
/** Physical addresses of buffers */
uintptr_t *buf_phys;
} hda_stream_buffers_t;
typedef struct hda_stream {
hda_t *hda;
/** Stream ID */
uint8_t sid;
/** Stream descriptor index */
uint8_t sdid;
/** Direction */
hda_stream_dir_t dir;
/** Buffers */
hda_stream_buffers_t *buffers;
/** Stream format */
uint32_t fmt;
} hda_stream_t;
extern errno_t hda_stream_buffers_alloc(hda_t *, hda_stream_buffers_t **);
extern void hda_stream_buffers_free(hda_stream_buffers_t *);
extern hda_stream_t *hda_stream_create(hda_t *, hda_stream_dir_t,
hda_stream_buffers_t *, uint32_t);
extern void hda_stream_destroy(hda_stream_t *);
extern void hda_stream_start(hda_stream_t *);
extern void hda_stream_stop(hda_stream_t *);
extern void hda_stream_reset(hda_stream_t *);
#endif
/** @}
*/