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Vinod Koule60061a2011-12-23 10:36:38 +05301/*
2 * compress_offload.h - compress offload header definations
3 *
4 * Copyright (C) 2011 Intel Corporation
5 * Authors: Vinod Koul <vinod.koul@linux.intel.com>
6 * Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 */
25#ifndef __COMPRESS_OFFLOAD_H
26#define __COMPRESS_OFFLOAD_H
27
28#include <linux/types.h>
29#include <sound/asound.h>
30#include <sound/compress_params.h>
31
32
33#define SNDRV_COMPRESS_VERSION SNDRV_PROTOCOL_VERSION(0, 1, 0)
34/**
35 * struct snd_compressed_buffer: compressed buffer
36 * @fragment_size: size of buffer fragment in bytes
37 * @fragments: number of such fragments
38 */
39struct snd_compressed_buffer {
40 __u32 fragment_size;
41 __u32 fragments;
42};
43
44/**
45 * struct snd_compr_params: compressed stream params
46 * @buffer: buffer description
47 * @codec: codec parameters
48 * @no_wake_mode: dont wake on fragment elapsed
49 */
50struct snd_compr_params {
51 struct snd_compressed_buffer buffer;
52 struct snd_codec codec;
53 __u8 no_wake_mode;
54};
55
56/**
57 * struct snd_compr_tstamp: timestamp descriptor
58 * @byte_offset: Byte offset in ring buffer to DSP
59 * @copied_total: Total number of bytes copied from/to ring buffer to/by DSP
60 * @pcm_frames: Frames decoded or encoded by DSP. This field will evolve by
61 * large steps and should only be used to monitor encoding/decoding
62 * progress. It shall not be used for timing estimates.
63 * @pcm_io_frames: Frames rendered or received by DSP into a mixer or an audio
64 * output/input. This field should be used for A/V sync or time estimates.
65 * @sampling_rate: sampling rate of audio
66 */
67struct snd_compr_tstamp {
68 __u32 byte_offset;
69 __u32 copied_total;
70 snd_pcm_uframes_t pcm_frames;
71 snd_pcm_uframes_t pcm_io_frames;
72 __u32 sampling_rate;
73};
74
75/**
76 * struct snd_compr_avail: avail descriptor
77 * @avail: Number of bytes available in ring buffer for writing/reading
78 * @tstamp: timestamp infomation
79 */
80struct snd_compr_avail {
81 __u64 avail;
82 struct snd_compr_tstamp tstamp;
83};
84
85enum snd_compr_direction {
86 SND_COMPRESS_PLAYBACK = 0,
87 SND_COMPRESS_CAPTURE
88};
89
90/**
91 * struct snd_compr_caps: caps descriptor
92 * @codecs: pointer to array of codecs
93 * @direction: direction supported. Of type snd_compr_direction
94 * @min_fragment_size: minimum fragment supported by DSP
95 * @max_fragment_size: maximum fragment supported by DSP
96 * @min_fragments: min fragments supported by DSP
97 * @max_fragments: max fragments supported by DSP
98 * @num_codecs: number of codecs supported
99 * @reserved: reserved field
100 */
101struct snd_compr_caps {
102 __u32 num_codecs;
103 __u32 direction;
104 __u32 min_fragment_size;
105 __u32 max_fragment_size;
106 __u32 min_fragments;
107 __u32 max_fragments;
108 __u32 codecs[MAX_NUM_CODECS];
109 __u32 reserved[11];
110};
111
112/**
113 * struct snd_compr_codec_caps: query capability of codec
114 * @codec: codec for which capability is queried
115 * @num_descriptors: number of codec descriptors
116 * @descriptor: array of codec capability descriptor
117 */
118struct snd_compr_codec_caps {
119 __u32 codec;
120 __u32 num_descriptors;
121 struct snd_codec_desc descriptor[MAX_NUM_CODEC_DESCRIPTORS];
122};
123
124/**
125 * compress path ioctl definitions
126 * SNDRV_COMPRESS_GET_CAPS: Query capability of DSP
127 * SNDRV_COMPRESS_GET_CODEC_CAPS: Query capability of a codec
128 * SNDRV_COMPRESS_SET_PARAMS: Set codec and stream parameters
129 * Note: only codec params can be changed runtime and stream params cant be
130 * SNDRV_COMPRESS_GET_PARAMS: Query codec params
131 * SNDRV_COMPRESS_TSTAMP: get the current timestamp value
132 * SNDRV_COMPRESS_AVAIL: get the current buffer avail value.
133 * This also queries the tstamp properties
134 * SNDRV_COMPRESS_PAUSE: Pause the running stream
135 * SNDRV_COMPRESS_RESUME: resume a paused stream
136 * SNDRV_COMPRESS_START: Start a stream
137 * SNDRV_COMPRESS_STOP: stop a running stream, discarding ring buffer content
138 * and the buffers currently with DSP
139 * SNDRV_COMPRESS_DRAIN: Play till end of buffers and stop after that
140 * SNDRV_COMPRESS_IOCTL_VERSION: Query the API version
141 */
142#define SNDRV_COMPRESS_IOCTL_VERSION _IOR('C', 0x00, int)
143#define SNDRV_COMPRESS_GET_CAPS _IOWR('C', 0x10, struct snd_compr_caps)
144#define SNDRV_COMPRESS_GET_CODEC_CAPS _IOWR('C', 0x11,\
145 struct snd_compr_codec_caps)
146#define SNDRV_COMPRESS_SET_PARAMS _IOW('C', 0x12, struct snd_compr_params)
147#define SNDRV_COMPRESS_GET_PARAMS _IOR('C', 0x13, struct snd_codec)
148#define SNDRV_COMPRESS_TSTAMP _IOR('C', 0x20, struct snd_compr_tstamp)
149#define SNDRV_COMPRESS_AVAIL _IOR('C', 0x21, struct snd_compr_avail)
150#define SNDRV_COMPRESS_PAUSE _IO('C', 0x30)
151#define SNDRV_COMPRESS_RESUME _IO('C', 0x31)
152#define SNDRV_COMPRESS_START _IO('C', 0x32)
153#define SNDRV_COMPRESS_STOP _IO('C', 0x33)
154#define SNDRV_COMPRESS_DRAIN _IO('C', 0x34)
155/*
156 * TODO
157 * 1. add mmap support
158 *
159 */
160#define SND_COMPR_TRIGGER_DRAIN 7 /*FIXME move this to pcm.h */
161#endif