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 snd_pcm_format_t 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 snd_pcm_access_t 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 snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format, 129 struct snd_mask *format_mask); 130 131 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin); 132 133 snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle, 134 struct snd_pcm_plugin_channel *src_channels, 135 snd_pcm_uframes_t size); 136 snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle, 137 struct snd_pcm_plugin_channel *dst_channels_final, 138 snd_pcm_uframes_t size); 139 140 snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle, 141 char *buf, snd_pcm_uframes_t count, 142 struct snd_pcm_plugin_channel **channels); 143 144 snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin, 145 snd_pcm_uframes_t frames, 146 struct snd_pcm_plugin_channel **channels); 147 148 int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel, 149 size_t dst_offset, 150 size_t samples, snd_pcm_format_t format); 151 int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel, 152 size_t src_offset, 153 const struct snd_pcm_channel_area *dst_channel, 154 size_t dst_offset, 155 size_t samples, snd_pcm_format_t format); 156 157 void *snd_pcm_plug_buf_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t size); 158 void snd_pcm_plug_buf_unlock(struct snd_pcm_substream *plug, void *ptr); 159 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, 160 const char *ptr, snd_pcm_uframes_t size, 161 int in_kernel); 162 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, 163 char *ptr, snd_pcm_uframes_t size, int in_kernel); 164 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, 165 void **bufs, snd_pcm_uframes_t frames, 166 int in_kernel); 167 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, 168 void **bufs, snd_pcm_uframes_t frames, 169 int in_kernel); 170 171 #else 172 173 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; } 174 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; } 175 static inline int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask) { return format; } 176 177 #endif 178 179 #ifdef PLUGIN_DEBUG 180 #define pdprintf(fmt, args...) printk(KERN_DEBUG "plugin: " fmt, ##args) 181 #else 182 #define pdprintf(fmt, args...) 183 #endif 184 185 #endif /* __PCM_PLUGIN_H */ 186