1 #ifndef __PCM_PLUGIN_H
2 #define __PCM_PLUGIN_H
3
4 /*
5 * Digital Audio (Plugin interface) abstract layer
6 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
26
27 #define snd_pcm_plug_stream(plug) ((plug)->stream)
28
29 enum snd_pcm_plugin_action {
30 INIT = 0,
31 PREPARE = 1,
32 };
33
34 struct snd_pcm_channel_area {
35 void *addr; /* base address of channel samples */
36 unsigned int first; /* offset to first sample in bits */
37 unsigned int step; /* samples distance in bits */
38 };
39
40 struct snd_pcm_plugin_channel {
41 void *aptr; /* pointer to the allocated area */
42 struct snd_pcm_channel_area area;
43 snd_pcm_uframes_t frames; /* allocated frames */
44 unsigned int enabled:1; /* channel need to be processed */
45 unsigned int wanted:1; /* channel is wanted */
46 };
47
48 struct snd_pcm_plugin_format {
49 int format;
50 unsigned int rate;
51 unsigned int channels;
52 };
53
54 struct snd_pcm_plugin {
55 const char *name; /* plug-in name */
56 int stream;
57 struct snd_pcm_plugin_format src_format; /* source format */
58 struct snd_pcm_plugin_format dst_format; /* destination format */
59 int src_width; /* sample width in bits */
60 int dst_width; /* sample width in bits */
61 int access;
62 snd_pcm_sframes_t (*src_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t dst_frames);
63 snd_pcm_sframes_t (*dst_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t src_frames);
64 snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin,
65 snd_pcm_uframes_t frames,
66 struct snd_pcm_plugin_channel **channels);
67 snd_pcm_sframes_t (*transfer)(struct snd_pcm_plugin *plugin,
68 const struct snd_pcm_plugin_channel *src_channels,
69 struct snd_pcm_plugin_channel *dst_channels,
70 snd_pcm_uframes_t frames);
71 int (*action)(struct snd_pcm_plugin *plugin,
72 enum snd_pcm_plugin_action action,
73 unsigned long data);
74 struct snd_pcm_plugin *prev;
75 struct snd_pcm_plugin *next;
76 struct snd_pcm_substream *plug;
77 void *private_data;
78 void (*private_free)(struct snd_pcm_plugin *plugin);
79 char *buf;
80 snd_pcm_uframes_t buf_frames;
81 struct snd_pcm_plugin_channel *buf_channels;
82 char extra_data[0];
83 };
84
85 int snd_pcm_plugin_build(struct snd_pcm_substream *handle,
86 const char *name,
87 struct snd_pcm_plugin_format *src_format,
88 struct snd_pcm_plugin_format *dst_format,
89 size_t extra,
90 struct snd_pcm_plugin **ret);
91 int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin);
92 int snd_pcm_plugin_clear(struct snd_pcm_plugin **first);
93 int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames);
94 snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size);
95 snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size);
96
97 #define FULL ROUTE_PLUGIN_RESOLUTION
98 #define HALF ROUTE_PLUGIN_RESOLUTION / 2
99
100 int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle,
101 struct snd_pcm_hw_params *params,
102 struct snd_pcm_plugin **r_plugin);
103 int snd_pcm_plugin_build_linear(struct snd_pcm_substream *handle,
104 struct snd_pcm_plugin_format *src_format,
105 struct snd_pcm_plugin_format *dst_format,
106 struct snd_pcm_plugin **r_plugin);
107 int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *handle,
108 struct snd_pcm_plugin_format *src_format,
109 struct snd_pcm_plugin_format *dst_format,
110 struct snd_pcm_plugin **r_plugin);
111 int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle,
112 struct snd_pcm_plugin_format *src_format,
113 struct snd_pcm_plugin_format *dst_format,
114 struct snd_pcm_plugin **r_plugin);
115 int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle,
116 struct snd_pcm_plugin_format *src_format,
117 struct snd_pcm_plugin_format *dst_format,
118 struct snd_pcm_plugin **r_plugin);
119 int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle,
120 struct snd_pcm_plugin_format *src_format,
121 struct snd_pcm_plugin_format *dst_format,
122 struct snd_pcm_plugin **r_plugin);
123
124 int snd_pcm_plug_format_plugins(struct snd_pcm_substream *substream,
125 struct snd_pcm_hw_params *params,
126 struct snd_pcm_hw_params *slave_params);
127
128 int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask);
129
130 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin);
131
132 snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle,
133 struct snd_pcm_plugin_channel *src_channels,
134 snd_pcm_uframes_t size);
135 snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle,
136 struct snd_pcm_plugin_channel *dst_channels_final,
137 snd_pcm_uframes_t size);
138
139 snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle,
140 char *buf, snd_pcm_uframes_t count,
141 struct snd_pcm_plugin_channel **channels);
142
143 snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin,
144 snd_pcm_uframes_t frames,
145 struct snd_pcm_plugin_channel **channels);
146
147 int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel,
148 size_t dst_offset,
149 size_t samples, int format);
150 int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel,
151 size_t src_offset,
152 const struct snd_pcm_channel_area *dst_channel,
153 size_t dst_offset,
154 size_t samples, int format);
155
156 void *snd_pcm_plug_buf_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t size);
157 void snd_pcm_plug_buf_unlock(struct snd_pcm_substream *plug, void *ptr);
158 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream,
159 const char *ptr, snd_pcm_uframes_t size,
160 int in_kernel);
161 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream,
162 char *ptr, snd_pcm_uframes_t size, int in_kernel);
163 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream,
164 void **bufs, snd_pcm_uframes_t frames,
165 int in_kernel);
166 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream,
167 void **bufs, snd_pcm_uframes_t frames,
168 int in_kernel);
169
170 #else
171
172 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; }
173 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; }
174 static inline int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask) { return format; }
175
176 #endif
177
178 #ifdef PLUGIN_DEBUG
179 #define pdprintf( fmt, args... ) printk( "plugin: " fmt, ##args)
180 #else
181 #define pdprintf( fmt, args... )
182 #endif
183
184 #endif /* __PCM_PLUGIN_H */
185
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