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/test/timer.c

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/time.h> #include "../include/asoundlib.h" void show_status(void *handle) { int err; snd_timer_status_t *status; snd_timer_status_alloca(&status); if ((err = snd_timer_status(handle, status)) < 0) { fprintf(stderr, "timer status %i (%s)\n", err, snd_strerror(err)); return; } printf("STATUS:\n"); printf(" resolution = %li\n", snd_timer_status_get_resolution(status)); printf(" lost = %li\n", snd_timer_status_get_lost(status)); printf(" overrun = %li\n", snd_timer_status_get_overrun(status)); printf(" queue = %li\n", snd_timer_status_get_queue(status)); } void read_loop(void *handle, int master_ticks, int timeout) { int count, err; struct pollfd *fds; snd_timer_read_t tr; count = snd_timer_poll_descriptors_count(handle); fds = calloc(count, sizeof(struct pollfd)); if (fds == NULL) { fprintf(stderr, "malloc error\n"); exit(EXIT_FAILURE); } while (master_ticks-- > 0) { if ((err = snd_timer_poll_descriptors(handle, fds, count)) < 0) { fprintf(stderr, "snd_timer_poll_descriptors error: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } if ((err = poll(fds, count, timeout)) < 0) { fprintf(stderr, "poll error %i (%s)\n", err, strerror(err)); exit(EXIT_FAILURE); } if (err == 0) { fprintf(stderr, "timer time out!!\n"); exit(EXIT_FAILURE); } while (snd_timer_read(handle, &tr, sizeof(tr)) == sizeof(tr)) { printf("TIMER: resolution = %uns, ticks = %u\n", tr.resolution, tr.ticks); } } free(fds); } int main(int argc, char *argv[]) { int idx, err; int class = SND_TIMER_CLASS_GLOBAL; int sclass = SND_TIMER_CLASS_NONE; int card = 0; int device = SND_TIMER_GLOBAL_SYSTEM; int subdevice = 0; int list = 0; snd_timer_t *handle; snd_timer_id_t *id; snd_timer_info_t *info; snd_timer_params_t *params; char timername[64]; snd_timer_id_alloca(&id); snd_timer_info_alloca(&info); snd_timer_params_alloca(&params); idx = 1; while (idx < argc) { if (!strncmp(argv[idx], "class=", 5)) { class = atoi(argv[idx]+6); } else if (!strncmp(argv[idx], "sclass=", 6)) { sclass = atoi(argv[idx]+7); } else if (!strncmp(argv[idx], "card=", 5)) { card = atoi(argv[idx]+5); } else if (!strncmp(argv[idx], "device=", 7)) { device = atoi(argv[idx]+7); } else if (!strncmp(argv[idx], "subdevice=", 10)) { subdevice = atoi(argv[idx]+10); } else if (!strcmp(argv[idx], "list")) { list = 1; } idx++; } if (class == SND_TIMER_CLASS_SLAVE && sclass == SND_TIMER_SCLASS_NONE) { fprintf(stderr, "slave class is not set\n"); exit(EXIT_FAILURE); } if (list) { snd_timer_query_t *qhandle; if ((err = snd_timer_query_open(&qhandle, "hw", 0)) < 0) { fprintf(stderr, "snd_timer_query_open error: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } snd_timer_id_set_class(id, SND_TIMER_CLASS_NONE); while (1) { if ((err = snd_timer_query_next_device(qhandle, id)) < 0) { fprintf(stderr, "timer next device error: %s\n", snd_strerror(err)); break; } if (snd_timer_id_get_class(id) < 0) break; printf("Timer device: class %i, sclass %i, card %i, device %i, subdevice %i\n", snd_timer_id_get_class(id), snd_timer_id_get_sclass(id), snd_timer_id_get_card(id), snd_timer_id_get_device(id), snd_timer_id_get_subdevice(id)); } snd_timer_query_close(qhandle); exit(EXIT_SUCCESS); } sprintf(timername, "hw:CLASS=%i,SCLASS=%i,CARD=%i,DEV=%i,SUBDEV=%i", class, sclass, card, device, subdevice); if ((err = snd_timer_open(&handle, timername, SND_TIMER_OPEN_NONBLOCK))<0) { fprintf(stderr, "timer open %i (%s)\n", err, snd_strerror(err)); exit(EXIT_FAILURE); } printf("Using timer class %i, slave class %i, card %i, device %i, subdevice %i\n", class, sclass, card, device, subdevice); if ((err = snd_timer_info(handle, info)) < 0) { fprintf(stderr, "timer info %i (%s)\n", err, snd_strerror(err)); exit(0); } printf("Timer info:\n"); printf(" slave = %s\n", snd_timer_info_is_slave(info) ? "yes" : "no"); printf(" card = %i\n", snd_timer_info_get_card(info)); printf(" id = '%s'\n", snd_timer_info_get_id(info)); printf(" name = '%s'\n", snd_timer_info_get_name(info)); printf(" average resolution = %li\n", snd_timer_info_get_resolution(info)); snd_timer_params_set_auto_start(params, 1); if (!snd_timer_info_is_slave(info)) { snd_timer_params_set_ticks(params, (1000000000 / snd_timer_info_get_resolution(info)) / 50); /* 50Hz */ if (snd_timer_params_get_ticks(params) < 1) snd_timer_params_set_ticks(params, 1); printf("Using %li tick(s)\n", snd_timer_params_get_ticks(params)); } else { snd_timer_params_set_ticks(params, 1); } if ((err = snd_timer_params(handle, params)) < 0) { fprintf(stderr, "timer params %i (%s)\n", err, snd_strerror(err)); exit(0); } show_status(handle); if ((err = snd_timer_start(handle)) < 0) { fprintf(stderr, "timer start %i (%s)\n", err, snd_strerror(err)); exit(EXIT_FAILURE); } read_loop(handle, 25, snd_timer_info_is_slave(info) ? 10000 : 25); show_status(handle); snd_timer_close(handle); printf("Done\n"); return EXIT_SUCCESS; }
00001 #include <stdio.h> 00002 #include <stdlib.h> 00003 #include <string.h> 00004 #include <sys/time.h> 00005 #include "../include/asoundlib.h" 00006 00007 void show_status(void *handle) 00008 { 00009 int err; 00010 snd_timer_status_t *status; 00011 00012 snd_timer_status_alloca(&status); 00013 if ((err = snd_timer_status(handle, status)) < 0) { 00014 fprintf(stderr, "timer status %i (%s)\n", err, snd_strerror(err)); 00015 return; 00016 } 00017 printf("STATUS:\n"); 00018 printf(" resolution = %li\n", snd_timer_status_get_resolution(status)); 00019 printf(" lost = %li\n", snd_timer_status_get_lost(status)); 00020 printf(" overrun = %li\n", snd_timer_status_get_overrun(status)); 00021 printf(" queue = %li\n", snd_timer_status_get_queue(status)); 00022 } 00023 00024 void read_loop(void *handle, int master_ticks, int timeout) 00025 { 00026 int count, err; 00027 struct pollfd *fds; 00028 snd_timer_read_t tr; 00029 00030 count = snd_timer_poll_descriptors_count(handle); 00031 fds = calloc(count, sizeof(struct pollfd)); 00032 if (fds == NULL) { 00033 fprintf(stderr, "malloc error\n"); 00034 exit(EXIT_FAILURE); 00035 } 00036 while (master_ticks-- > 0) { 00037 if ((err = snd_timer_poll_descriptors(handle, fds, count)) < 0) { 00038 fprintf(stderr, "snd_timer_poll_descriptors error: %s\n", snd_strerror(err)); 00039 exit(EXIT_FAILURE); 00040 } 00041 if ((err = poll(fds, count, timeout)) < 0) { 00042 fprintf(stderr, "poll error %i (%s)\n", err, strerror(err)); 00043 exit(EXIT_FAILURE); 00044 } 00045 if (err == 0) { 00046 fprintf(stderr, "timer time out!!\n"); 00047 exit(EXIT_FAILURE); 00048 } 00049 while (snd_timer_read(handle, &tr, sizeof(tr)) == sizeof(tr)) { 00050 printf("TIMER: resolution = %uns, ticks = %u\n", 00051 tr.resolution, tr.ticks); 00052 } 00053 } 00054 free(fds); 00055 } 00056 00057 int main(int argc, char *argv[]) 00058 { 00059 int idx, err; 00060 int class = SND_TIMER_CLASS_GLOBAL; 00061 int sclass = SND_TIMER_CLASS_NONE; 00062 int card = 0; 00063 int device = SND_TIMER_GLOBAL_SYSTEM; 00064 int subdevice = 0; 00065 int list = 0; 00066 snd_timer_t *handle; 00067 snd_timer_id_t *id; 00068 snd_timer_info_t *info; 00069 snd_timer_params_t *params; 00070 char timername[64]; 00071 00072 snd_timer_id_alloca(&id); 00073 snd_timer_info_alloca(&info); 00074 snd_timer_params_alloca(&params); 00075 00076 idx = 1; 00077 while (idx < argc) { 00078 if (!strncmp(argv[idx], "class=", 5)) { 00079 class = atoi(argv[idx]+6); 00080 } else if (!strncmp(argv[idx], "sclass=", 6)) { 00081 sclass = atoi(argv[idx]+7); 00082 } else if (!strncmp(argv[idx], "card=", 5)) { 00083 card = atoi(argv[idx]+5); 00084 } else if (!strncmp(argv[idx], "device=", 7)) { 00085 device = atoi(argv[idx]+7); 00086 } else if (!strncmp(argv[idx], "subdevice=", 10)) { 00087 subdevice = atoi(argv[idx]+10); 00088 } else if (!strcmp(argv[idx], "list")) { 00089 list = 1; 00090 } 00091 idx++; 00092 } 00093 if (class == SND_TIMER_CLASS_SLAVE && sclass == SND_TIMER_SCLASS_NONE) { 00094 fprintf(stderr, "slave class is not set\n"); 00095 exit(EXIT_FAILURE); 00096 } 00097 if (list) { 00098 snd_timer_query_t *qhandle; 00099 if ((err = snd_timer_query_open(&qhandle, "hw", 0)) < 0) { 00100 fprintf(stderr, "snd_timer_query_open error: %s\n", snd_strerror(err)); 00101 exit(EXIT_FAILURE); 00102 } 00103 snd_timer_id_set_class(id, SND_TIMER_CLASS_NONE); 00104 while (1) { 00105 if ((err = snd_timer_query_next_device(qhandle, id)) < 0) { 00106 fprintf(stderr, "timer next device error: %s\n", snd_strerror(err)); 00107 break; 00108 } 00109 if (snd_timer_id_get_class(id) < 0) 00110 break; 00111 printf("Timer device: class %i, sclass %i, card %i, device %i, subdevice %i\n", 00112 snd_timer_id_get_class(id), 00113 snd_timer_id_get_sclass(id), 00114 snd_timer_id_get_card(id), 00115 snd_timer_id_get_device(id), 00116 snd_timer_id_get_subdevice(id)); 00117 } 00118 snd_timer_query_close(qhandle); 00119 exit(EXIT_SUCCESS); 00120 } 00121 sprintf(timername, "hw:CLASS=%i,SCLASS=%i,CARD=%i,DEV=%i,SUBDEV=%i", class, sclass, card, device, subdevice); 00122 if ((err = snd_timer_open(&handle, timername, SND_TIMER_OPEN_NONBLOCK))<0) { 00123 fprintf(stderr, "timer open %i (%s)\n", err, snd_strerror(err)); 00124 exit(EXIT_FAILURE); 00125 } 00126 printf("Using timer class %i, slave class %i, card %i, device %i, subdevice %i\n", class, sclass, card, device, subdevice); 00127 if ((err = snd_timer_info(handle, info)) < 0) { 00128 fprintf(stderr, "timer info %i (%s)\n", err, snd_strerror(err)); 00129 exit(0); 00130 } 00131 printf("Timer info:\n"); 00132 printf(" slave = %s\n", snd_timer_info_is_slave(info) ? "yes" : "no"); 00133 printf(" card = %i\n", snd_timer_info_get_card(info)); 00134 printf(" id = '%s'\n", snd_timer_info_get_id(info)); 00135 printf(" name = '%s'\n", snd_timer_info_get_name(info)); 00136 printf(" average resolution = %li\n", snd_timer_info_get_resolution(info)); 00137 snd_timer_params_set_auto_start(params, 1); 00138 if (!snd_timer_info_is_slave(info)) { 00139 snd_timer_params_set_ticks(params, (1000000000 / snd_timer_info_get_resolution(info)) / 50); /* 50Hz */ 00140 if (snd_timer_params_get_ticks(params) < 1) 00141 snd_timer_params_set_ticks(params, 1); 00142 printf("Using %li tick(s)\n", snd_timer_params_get_ticks(params)); 00143 } else { 00144 snd_timer_params_set_ticks(params, 1); 00145 } 00146 if ((err = snd_timer_params(handle, params)) < 0) { 00147 fprintf(stderr, "timer params %i (%s)\n", err, snd_strerror(err)); 00148 exit(0); 00149 } 00150 show_status(handle); 00151 if ((err = snd_timer_start(handle)) < 0) { 00152 fprintf(stderr, "timer start %i (%s)\n", err, snd_strerror(err)); 00153 exit(EXIT_FAILURE); 00154 } 00155 read_loop(handle, 25, snd_timer_info_is_slave(info) ? 10000 : 25); 00156 show_status(handle); 00157 snd_timer_close(handle); 00158 printf("Done\n"); 00159 return EXIT_SUCCESS; 00160 }

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