| 1 | /*
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| 2 | * Copyright (c) 2014 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup hdaudio
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| 30 | * @{
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| 31 | */
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| 32 | /** @file High Definition Audio stream
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| 33 | */
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| 34 |
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| 35 | #ifndef STREAM_H
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| 36 | #define STREAM_H
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| 37 |
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| 38 | #include "hdaudio.h"
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| 39 | #include "spec/bdl.h"
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| 40 |
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| 41 | typedef enum {
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| 42 | /** Input Stream */
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| 43 | sdir_input,
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| 44 | /** Output Stream */
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| 45 | sdir_output,
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| 46 | /** Bidirectional Stream */
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| 47 | sdir_bidi
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| 48 | } hda_stream_dir_t;
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| 49 |
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| 50 | typedef struct hda_stream {
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| 51 | hda_t *hda;
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| 52 | /** Stream ID */
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| 53 | uint8_t sid;
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| 54 | /** Stream descriptor index */
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| 55 | uint8_t sdid;
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| 56 | /** Direction */
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| 57 | hda_stream_dir_t dir;
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| 58 | /** Number of buffers */
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| 59 | size_t nbuffers;
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| 60 | /** Buffer size */
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| 61 | size_t bufsize;
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| 62 | /** Buffer Descriptor List */
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| 63 | hda_buffer_desc_t *bdl;
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| 64 | /** Physical address of BDL */
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| 65 | uintptr_t bdl_phys;
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| 66 | /** Buffers */
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| 67 | void **buf;
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| 68 | /** Physical addresses of buffers */
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| 69 | uintptr_t *buf_phys;
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| 70 | /** Stream format */
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| 71 | uint32_t fmt;
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| 72 | } hda_stream_t;
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| 73 |
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| 74 | extern hda_stream_t *hda_stream_create(hda_t *, hda_stream_dir_t, uint32_t);
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| 75 | extern void hda_stream_destroy(hda_stream_t *);
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| 76 | extern void hda_stream_start(hda_stream_t *);
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| 77 | extern void hda_stream_stop(hda_stream_t *);
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| 78 | extern void hda_stream_reset(hda_stream_t *);
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| 79 |
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| 80 | #endif
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| 81 |
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| 82 | /** @}
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| 83 | */
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