1 /** 2 * \file include/timer.h 3 * \brief Application interface library for the ALSA driver 4 * \author Jaroslav Kysela <perex (at) perex.cz> 5 * \author Abramo Bagnara <abramo (at) alsa-project.org> 6 * \author Takashi Iwai <tiwai (at) suse.de> 7 * \date 1998-2001 8 * 9 * Application interface library for the ALSA driver 10 */ 11 /* 12 * This library is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU Lesser General Public License as 14 * published by the Free Software Foundation; either version 2.1 of 15 * the License, or (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU Lesser General Public License for more details. 21 * 22 * You should have received a copy of the GNU Lesser General Public 23 * License along with this library; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 */ 27 28 #ifndef __ALSA_TIMER_H 29 #define __ALSA_TIMER_H 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 /** 36 * \defgroup Timer Timer Interface 37 * Timer Interface. See \ref timer page for more details. 38 * \{ 39 */ 40 41 /** dlsym version for interface entry callback */ 42 #define SND_TIMER_DLSYM_VERSION _dlsym_timer_001 43 /** dlsym version for interface entry callback */ 44 #define SND_TIMER_QUERY_DLSYM_VERSION _dlsym_timer_query_001 45 46 /** timer identification structure */ 47 typedef struct _snd_timer_id snd_timer_id_t; 48 /** timer global info structure */ 49 typedef struct _snd_timer_ginfo snd_timer_ginfo_t; 50 /** timer global params structure */ 51 typedef struct _snd_timer_gparams snd_timer_gparams_t; 52 /** timer global status structure */ 53 typedef struct _snd_timer_gstatus snd_timer_gstatus_t; 54 /** timer info structure */ 55 typedef struct _snd_timer_info snd_timer_info_t; 56 /** timer params structure */ 57 typedef struct _snd_timer_params snd_timer_params_t; 58 /** timer status structure */ 59 typedef struct _snd_timer_status snd_timer_status_t; 60 /** timer master class */ 61 typedef enum _snd_timer_class { 62 SND_TIMER_CLASS_NONE = -1, /**< invalid */ 63 SND_TIMER_CLASS_SLAVE = 0, /**< slave timer */ 64 SND_TIMER_CLASS_GLOBAL, /**< global timer */ 65 SND_TIMER_CLASS_CARD, /**< card timer */ 66 SND_TIMER_CLASS_PCM, /**< PCM timer */ 67 SND_TIMER_CLASS_LAST = SND_TIMER_CLASS_PCM /**< last timer */ 68 } snd_timer_class_t; 69 70 /** timer slave class */ 71 typedef enum _snd_timer_slave_class { 72 SND_TIMER_SCLASS_NONE = 0, /**< none */ 73 SND_TIMER_SCLASS_APPLICATION, /**< for internal use */ 74 SND_TIMER_SCLASS_SEQUENCER, /**< sequencer timer */ 75 SND_TIMER_SCLASS_OSS_SEQUENCER, /**< OSS sequencer timer */ 76 SND_TIMER_SCLASS_LAST = SND_TIMER_SCLASS_OSS_SEQUENCER /**< last slave timer */ 77 } snd_timer_slave_class_t; 78 79 /** timer read event identification */ 80 typedef enum _snd_timer_event { 81 SND_TIMER_EVENT_RESOLUTION = 0, /* val = resolution in ns */ 82 SND_TIMER_EVENT_TICK, /* val = ticks */ 83 SND_TIMER_EVENT_START, /* val = resolution in ns */ 84 SND_TIMER_EVENT_STOP, /* val = 0 */ 85 SND_TIMER_EVENT_CONTINUE, /* val = resolution in ns */ 86 SND_TIMER_EVENT_PAUSE, /* val = 0 */ 87 SND_TIMER_EVENT_EARLY, /* val = 0 */ 88 SND_TIMER_EVENT_SUSPEND, /* val = 0 */ 89 SND_TIMER_EVENT_RESUME, /* val = resolution in ns */ 90 /* master timer events for slave timer instances */ 91 SND_TIMER_EVENT_MSTART = SND_TIMER_EVENT_START + 10, 92 SND_TIMER_EVENT_MSTOP = SND_TIMER_EVENT_STOP + 10, 93 SND_TIMER_EVENT_MCONTINUE = SND_TIMER_EVENT_CONTINUE + 10, 94 SND_TIMER_EVENT_MPAUSE = SND_TIMER_EVENT_PAUSE + 10, 95 SND_TIMER_EVENT_MSUSPEND = SND_TIMER_EVENT_SUSPEND + 10, 96 SND_TIMER_EVENT_MRESUME = SND_TIMER_EVENT_RESUME + 10 97 } snd_timer_event_t; 98 99 /** timer read structure */ 100 typedef struct _snd_timer_read { 101 unsigned int resolution; /**< tick resolution in nanoseconds */ 102 unsigned int ticks; /**< count of happened ticks */ 103 } snd_timer_read_t; 104 105 /** timer tstamp + event read structure */ 106 typedef struct _snd_timer_tread { 107 snd_timer_event_t event; /**< Timer event */ 108 snd_htimestamp_t tstamp; /**< Time stamp of each event */ 109 unsigned int val; /**< Event value */ 110 } snd_timer_tread_t; 111 112 /** global timer - system */ 113 #define SND_TIMER_GLOBAL_SYSTEM 0 114 /** global timer - RTC */ 115 #define SND_TIMER_GLOBAL_RTC 1 116 /** global timer - HPET */ 117 #define SND_TIMER_GLOBAL_HPET 2 118 119 /** timer open mode flag - non-blocking behaviour */ 120 #define SND_TIMER_OPEN_NONBLOCK (1<<0) 121 /** use timestamps and event notification - enhanced read */ 122 #define SND_TIMER_OPEN_TREAD (1<<1) 123 124 /** timer handle type */ 125 typedef enum _snd_timer_type { 126 /** Kernel level HwDep */ 127 SND_TIMER_TYPE_HW = 0, 128 /** Shared memory client timer (not yet implemented) */ 129 SND_TIMER_TYPE_SHM, 130 /** INET client timer (not yet implemented) */ 131 SND_TIMER_TYPE_INET 132 } snd_timer_type_t; 133 134 /** timer query handle */ 135 typedef struct _snd_timer_query snd_timer_query_t; 136 /** timer handle */ 137 typedef struct _snd_timer snd_timer_t; 138 139 140 int snd_timer_query_open(snd_timer_query_t **handle, const char *name, int mode); 141 int snd_timer_query_open_lconf(snd_timer_query_t **handle, const char *name, int mode, snd_config_t *lconf); 142 int snd_timer_query_close(snd_timer_query_t *handle); 143 int snd_timer_query_next_device(snd_timer_query_t *handle, snd_timer_id_t *tid); 144 int snd_timer_query_info(snd_timer_query_t *handle, snd_timer_ginfo_t *info); 145 int snd_timer_query_params(snd_timer_query_t *handle, snd_timer_gparams_t *params); 146 int snd_timer_query_status(snd_timer_query_t *handle, snd_timer_gstatus_t *status); 147 148 int snd_timer_open(snd_timer_t **handle, const char *name, int mode); 149 int snd_timer_open_lconf(snd_timer_t **handle, const char *name, int mode, snd_config_t *lconf); 150 int snd_timer_close(snd_timer_t *handle); 151 int snd_async_add_timer_handler(snd_async_handler_t **handler, snd_timer_t *timer, 152 snd_async_callback_t callback, void *private_data); 153 snd_timer_t *snd_async_handler_get_timer(snd_async_handler_t *handler); 154 int snd_timer_poll_descriptors_count(snd_timer_t *handle); 155 int snd_timer_poll_descriptors(snd_timer_t *handle, struct pollfd *pfds, unsigned int space); 156 int snd_timer_poll_descriptors_revents(snd_timer_t *timer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents); 157 int snd_timer_info(snd_timer_t *handle, snd_timer_info_t *timer); 158 int snd_timer_params(snd_timer_t *handle, snd_timer_params_t *params); 159 int snd_timer_status(snd_timer_t *handle, snd_timer_status_t *status); 160 int snd_timer_start(snd_timer_t *handle); 161 int snd_timer_stop(snd_timer_t *handle); 162 int snd_timer_continue(snd_timer_t *handle); 163 ssize_t snd_timer_read(snd_timer_t *handle, void *buffer, size_t size); 164 165 size_t snd_timer_id_sizeof(void); 166 /** allocate #snd_timer_id_t container on stack */ 167 #define snd_timer_id_alloca(ptr) do { assert(ptr); *ptr = (snd_timer_id_t *) alloca(snd_timer_id_sizeof()); memset(*ptr, 0, snd_timer_id_sizeof()); } while (0) 168 int snd_timer_id_malloc(snd_timer_id_t **ptr); 169 void snd_timer_id_free(snd_timer_id_t *obj); 170 void snd_timer_id_copy(snd_timer_id_t *dst, const snd_timer_id_t *src); 171 172 void snd_timer_id_set_class(snd_timer_id_t *id, int dev_class); 173 int snd_timer_id_get_class(snd_timer_id_t *id); 174 void snd_timer_id_set_sclass(snd_timer_id_t *id, int dev_sclass); 175 int snd_timer_id_get_sclass(snd_timer_id_t *id); 176 void snd_timer_id_set_card(snd_timer_id_t *id, int card); 177 int snd_timer_id_get_card(snd_timer_id_t *id); 178 void snd_timer_id_set_device(snd_timer_id_t *id, int device); 179 int snd_timer_id_get_device(snd_timer_id_t *id); 180 void snd_timer_id_set_subdevice(snd_timer_id_t *id, int subdevice); 181 int snd_timer_id_get_subdevice(snd_timer_id_t *id); 182 183 size_t snd_timer_ginfo_sizeof(void); 184 /** allocate #snd_timer_ginfo_t container on stack */ 185 #define snd_timer_ginfo_alloca(ptr) do { assert(ptr); *ptr = (snd_timer_ginfo_t *) alloca(snd_timer_ginfo_sizeof()); memset(*ptr, 0, snd_timer_ginfo_sizeof()); } while (0) 186 int snd_timer_ginfo_malloc(snd_timer_ginfo_t **ptr); 187 void snd_timer_ginfo_free(snd_timer_ginfo_t *obj); 188 void snd_timer_ginfo_copy(snd_timer_ginfo_t *dst, const snd_timer_ginfo_t *src); 189 190 int snd_timer_ginfo_set_tid(snd_timer_ginfo_t *obj, snd_timer_id_t *tid); 191 snd_timer_id_t *snd_timer_ginfo_get_tid(snd_timer_ginfo_t *obj); 192 unsigned int snd_timer_ginfo_get_flags(snd_timer_ginfo_t *obj); 193 int snd_timer_ginfo_get_card(snd_timer_ginfo_t *obj); 194 char *snd_timer_ginfo_get_id(snd_timer_ginfo_t *obj); 195 char *snd_timer_ginfo_get_name(snd_timer_ginfo_t *obj); 196 unsigned long snd_timer_ginfo_get_resolution(snd_timer_ginfo_t *obj); 197 unsigned long snd_timer_ginfo_get_resolution_min(snd_timer_ginfo_t *obj); 198 unsigned long snd_timer_ginfo_get_resolution_max(snd_timer_ginfo_t *obj); 199 unsigned int snd_timer_ginfo_get_clients(snd_timer_ginfo_t *obj); 200 201 size_t snd_timer_info_sizeof(void); 202 /** allocate #snd_timer_info_t container on stack */ 203 #define snd_timer_info_alloca(ptr) do { assert(ptr); *ptr = (snd_timer_info_t *) alloca(snd_timer_info_sizeof()); memset(*ptr, 0, snd_timer_info_sizeof()); } while (0) 204 int snd_timer_info_malloc(snd_timer_info_t **ptr); 205 void snd_timer_info_free(snd_timer_info_t *obj); 206 void snd_timer_info_copy(snd_timer_info_t *dst, const snd_timer_info_t *src); 207 208 int snd_timer_info_is_slave(snd_timer_info_t * info); 209 int snd_timer_info_get_card(snd_timer_info_t * info); 210 const char *snd_timer_info_get_id(snd_timer_info_t * info); 211 const char *snd_timer_info_get_name(snd_timer_info_t * info); 212 long snd_timer_info_get_resolution(snd_timer_info_t * info); 213 214 size_t snd_timer_params_sizeof(void); 215 /** allocate #snd_timer_params_t container on stack */ 216 #define snd_timer_params_alloca(ptr) do { assert(ptr); *ptr = (snd_timer_params_t *) alloca(snd_timer_params_sizeof()); memset(*ptr, 0, snd_timer_params_sizeof()); } while (0) 217 int snd_timer_params_malloc(snd_timer_params_t **ptr); 218 void snd_timer_params_free(snd_timer_params_t *obj); 219 void snd_timer_params_copy(snd_timer_params_t *dst, const snd_timer_params_t *src); 220 221 int snd_timer_params_set_auto_start(snd_timer_params_t * params, int auto_start); 222 int snd_timer_params_get_auto_start(snd_timer_params_t * params); 223 int snd_timer_params_set_exclusive(snd_timer_params_t * params, int exclusive); 224 int snd_timer_params_get_exclusive(snd_timer_params_t * params); 225 int snd_timer_params_set_early_event(snd_timer_params_t * params, int early_event); 226 int snd_timer_params_get_early_event(snd_timer_params_t * params); 227 void snd_timer_params_set_ticks(snd_timer_params_t * params, long ticks); 228 long snd_timer_params_get_ticks(snd_timer_params_t * params); 229 void snd_timer_params_set_queue_size(snd_timer_params_t * params, long queue_size); 230 long snd_timer_params_get_queue_size(snd_timer_params_t * params); 231 void snd_timer_params_set_filter(snd_timer_params_t * params, unsigned int filter); 232 unsigned int snd_timer_params_get_filter(snd_timer_params_t * params); 233 234 size_t snd_timer_status_sizeof(void); 235 /** allocate #snd_timer_status_t container on stack */ 236 #define snd_timer_status_alloca(ptr) do { assert(ptr); *ptr = (snd_timer_status_t *) alloca(snd_timer_status_sizeof()); memset(*ptr, 0, snd_timer_status_sizeof()); } while (0) 237 int snd_timer_status_malloc(snd_timer_status_t **ptr); 238 void snd_timer_status_free(snd_timer_status_t *obj); 239 void snd_timer_status_copy(snd_timer_status_t *dst, const snd_timer_status_t *src); 240 241 snd_htimestamp_t snd_timer_status_get_timestamp(snd_timer_status_t * status); 242 long snd_timer_status_get_resolution(snd_timer_status_t * status); 243 long snd_timer_status_get_lost(snd_timer_status_t * status); 244 long snd_timer_status_get_overrun(snd_timer_status_t * status); 245 long snd_timer_status_get_queue(snd_timer_status_t * status); 246 247 /* deprecated functions, for compatibility */ 248 long snd_timer_info_get_ticks(snd_timer_info_t * info); 249 250 /** \} */ 251 252 #ifdef __cplusplus 253 } 254 #endif 255 256 #endif /** __ALSA_TIMER_H */ 257 258
