1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | #ifndef __PCM_PLUGIN_H |
3 | #define __PCM_PLUGIN_H |
4 | |
5 | /* |
6 | * Digital Audio (Plugin interface) abstract layer |
7 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
8 | */ |
9 | |
10 | #ifdef CONFIG_SND_PCM_OSS_PLUGINS |
11 | |
12 | #define snd_pcm_plug_stream(plug) ((plug)->stream) |
13 | |
14 | enum snd_pcm_plugin_action { |
15 | INIT = 0, |
16 | PREPARE = 1, |
17 | }; |
18 | |
19 | struct snd_pcm_channel_area { |
20 | void *addr; /* base address of channel samples */ |
21 | unsigned int first; /* offset to first sample in bits */ |
22 | unsigned int step; /* samples distance in bits */ |
23 | }; |
24 | |
25 | struct snd_pcm_plugin_channel { |
26 | void *aptr; /* pointer to the allocated area */ |
27 | struct snd_pcm_channel_area area; |
28 | snd_pcm_uframes_t frames; /* allocated frames */ |
29 | unsigned int enabled:1; /* channel need to be processed */ |
30 | unsigned int wanted:1; /* channel is wanted */ |
31 | }; |
32 | |
33 | struct snd_pcm_plugin_format { |
34 | snd_pcm_format_t format; |
35 | unsigned int rate; |
36 | unsigned int channels; |
37 | }; |
38 | |
39 | struct snd_pcm_plugin { |
40 | const char *name; /* plug-in name */ |
41 | int stream; |
42 | struct snd_pcm_plugin_format src_format; /* source format */ |
43 | struct snd_pcm_plugin_format dst_format; /* destination format */ |
44 | int src_width; /* sample width in bits */ |
45 | int dst_width; /* sample width in bits */ |
46 | snd_pcm_access_t access; |
47 | snd_pcm_sframes_t (*src_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t dst_frames); |
48 | snd_pcm_sframes_t (*dst_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t src_frames); |
49 | snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin, |
50 | snd_pcm_uframes_t frames, |
51 | struct snd_pcm_plugin_channel **channels); |
52 | snd_pcm_sframes_t (*transfer)(struct snd_pcm_plugin *plugin, |
53 | const struct snd_pcm_plugin_channel *src_channels, |
54 | struct snd_pcm_plugin_channel *dst_channels, |
55 | snd_pcm_uframes_t frames); |
56 | int (*action)(struct snd_pcm_plugin *plugin, |
57 | enum snd_pcm_plugin_action action, |
58 | unsigned long data); |
59 | struct snd_pcm_plugin *prev; |
60 | struct snd_pcm_plugin *next; |
61 | struct snd_pcm_substream *plug; |
62 | void *private_data; |
63 | void (*private_free)(struct snd_pcm_plugin *plugin); |
64 | char *buf; |
65 | snd_pcm_uframes_t buf_frames; |
66 | struct snd_pcm_plugin_channel *buf_channels; |
67 | char []; |
68 | }; |
69 | |
70 | int snd_pcm_plugin_build(struct snd_pcm_substream *handle, |
71 | const char *name, |
72 | struct snd_pcm_plugin_format *src_format, |
73 | struct snd_pcm_plugin_format *dst_format, |
74 | size_t , |
75 | struct snd_pcm_plugin **ret); |
76 | int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin); |
77 | int snd_pcm_plugin_clear(struct snd_pcm_plugin **first); |
78 | int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames); |
79 | snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size); |
80 | snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size); |
81 | |
82 | #define FULL ROUTE_PLUGIN_RESOLUTION |
83 | #define HALF ROUTE_PLUGIN_RESOLUTION / 2 |
84 | |
85 | int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle, |
86 | struct snd_pcm_hw_params *params, |
87 | struct snd_pcm_plugin **r_plugin); |
88 | int snd_pcm_plugin_build_linear(struct snd_pcm_substream *handle, |
89 | struct snd_pcm_plugin_format *src_format, |
90 | struct snd_pcm_plugin_format *dst_format, |
91 | struct snd_pcm_plugin **r_plugin); |
92 | int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *handle, |
93 | struct snd_pcm_plugin_format *src_format, |
94 | struct snd_pcm_plugin_format *dst_format, |
95 | struct snd_pcm_plugin **r_plugin); |
96 | int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle, |
97 | struct snd_pcm_plugin_format *src_format, |
98 | struct snd_pcm_plugin_format *dst_format, |
99 | struct snd_pcm_plugin **r_plugin); |
100 | int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle, |
101 | struct snd_pcm_plugin_format *src_format, |
102 | struct snd_pcm_plugin_format *dst_format, |
103 | struct snd_pcm_plugin **r_plugin); |
104 | int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle, |
105 | struct snd_pcm_plugin_format *src_format, |
106 | struct snd_pcm_plugin_format *dst_format, |
107 | struct snd_pcm_plugin **r_plugin); |
108 | |
109 | int snd_pcm_plug_format_plugins(struct snd_pcm_substream *substream, |
110 | struct snd_pcm_hw_params *params, |
111 | struct snd_pcm_hw_params *slave_params); |
112 | |
113 | snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format, |
114 | const struct snd_mask *format_mask); |
115 | |
116 | int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin); |
117 | |
118 | snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle, |
119 | struct snd_pcm_plugin_channel *src_channels, |
120 | snd_pcm_uframes_t size); |
121 | snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle, |
122 | struct snd_pcm_plugin_channel *dst_channels_final, |
123 | snd_pcm_uframes_t size); |
124 | |
125 | snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle, |
126 | char *buf, snd_pcm_uframes_t count, |
127 | struct snd_pcm_plugin_channel **channels); |
128 | |
129 | snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin, |
130 | snd_pcm_uframes_t frames, |
131 | struct snd_pcm_plugin_channel **channels); |
132 | |
133 | int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel, |
134 | size_t dst_offset, |
135 | size_t samples, snd_pcm_format_t format); |
136 | int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel, |
137 | size_t src_offset, |
138 | const struct snd_pcm_channel_area *dst_channel, |
139 | size_t dst_offset, |
140 | size_t samples, snd_pcm_format_t format); |
141 | |
142 | void *snd_pcm_plug_buf_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t size); |
143 | void snd_pcm_plug_buf_unlock(struct snd_pcm_substream *plug, void *ptr); |
144 | #else |
145 | |
146 | static inline snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size) { return drv_size; } |
147 | static inline snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size) { return clt_size; } |
148 | static inline int snd_pcm_plug_slave_format(int format, const struct snd_mask *format_mask) { return format; } |
149 | |
150 | #endif |
151 | |
152 | snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, |
153 | const char *ptr, snd_pcm_uframes_t size, |
154 | int in_kernel); |
155 | snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, |
156 | char *ptr, snd_pcm_uframes_t size, int in_kernel); |
157 | snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, |
158 | void **bufs, snd_pcm_uframes_t frames); |
159 | snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, |
160 | void **bufs, snd_pcm_uframes_t frames); |
161 | |
162 | #ifdef PLUGIN_DEBUG |
163 | #define pdprintf(fmt, args...) printk(KERN_DEBUG "plugin: " fmt, ##args) |
164 | #else |
165 | #define pdprintf(fmt, args...) |
166 | #endif |
167 | |
168 | #endif /* __PCM_PLUGIN_H */ |
169 | |