diff options
Diffstat (limited to 'tutorials/sndkit/libossmix_demo/ossmixlib_demo.c')
| -rw-r--r-- | tutorials/sndkit/libossmix_demo/ossmixlib_demo.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/tutorials/sndkit/libossmix_demo/ossmixlib_demo.c b/tutorials/sndkit/libossmix_demo/ossmixlib_demo.c new file mode 100644 index 0000000..aa6b8b6 --- /dev/null +++ b/tutorials/sndkit/libossmix_demo/ossmixlib_demo.c @@ -0,0 +1,272 @@ +/* + * + * This file is part of Open Sound System. + * + * Copyright (C) 4Front Technologies 1996-2008. + * + * This this source file is released under GPL v2 license (no other versions). + * See the COPYING file included in the main directory of this source + * distribution for the license terms and conditions. + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> + +#include <sys/soundcard.h> +#include <sys/libossmix.h> + +static void +event_callback(ossmix_callback_parm_t *parms) +{ + switch (parms->event) + { + case OSSMIX_EVENT_VALUE: + printf("Value change, mixer=%d, ctl=%d, value=0x%08x\n", parms->p1, parms->p2, parms->p3); + break; + + case OSSMIX_EVENT_NEWMIXER: + printf("Number of mixers increased to %d\n", parms->p1); + break; + + default: + printf("Event callback %d, %d, %d, %d, %d\n", parms->event, parms->p1, parms->p2, parms->p3, parms->p4); + } +} + +static void +command_parser(char *line) +{ + char *p = line + strlen(line)-1; + + if (*p == '\n') + *p=0; + + if (strcmp(line, "exit")==0 || strcmp(line, "q")==0) + exit(0); +} + +static void +interactive_mode(void) +{ + int libfd=-1, maxdev, ndevs; + fd_set readfds; + ossmix_select_poll_t pollfunc; + struct timeval tmout; + + libfd=ossmix_get_fd(&pollfunc); + + ossmix_set_callback(event_callback); + + printf("libfd=%d, func=%p\n", libfd, pollfunc); + printf("\n"); + printf("> ");fflush(stdout); + + if (libfd >= 0) + { + tmout.tv_sec = 0; + tmout.tv_usec = 100000; /* 0.1 sec */ + } + else + { + tmout.tv_sec = 0; + tmout.tv_usec = 0; + } + + while (1) + { + FD_ZERO (&readfds); + + maxdev = 0; + + FD_SET (0, &readfds); // Stdin + if (libfd > 0) + FD_SET (libfd, &readfds); + + if (libfd > maxdev) + maxdev = libfd; + + if ((ndevs = + select (maxdev + 1, &readfds, NULL, NULL, &tmout)) == -1) + { + perror ("select"); + exit (-1); + } + + if (ndevs == 0) + { + ossmix_timertick(); + tmout.tv_sec = 0; + tmout.tv_usec = 100000; /* 0.1 sec */ + } + + if (FD_ISSET (0, &readfds)) /* Stdio */ + { + char line[128]; + + if (fgets(line, sizeof(line)-1, stdin) != NULL) + { + command_parser(line); + printf("> ");fflush(stdout); + } + } + + if (libfd > 0) + if (FD_ISSET (libfd, &readfds)) + pollfunc(); + } +} + +static void +print_enum_list(int mixnum, int ctl) +{ + oss_mixer_enuminfo desc; + int i; + + if (ossmix_get_enuminfo(mixnum, ctl, &desc)<0) + { + fprintf(stderr, "ossmix_get_enuminfo() failed\n"); + return; + } + + for (i=0;i<desc.nvalues;i++) + { + if (i>0)printf(" | "); + printf("%s", desc.strings+desc.strindex[i]); + } + + printf("\n"); +} + +static void +print_description(int mixnum, int ctl) +{ + oss_mixer_enuminfo desc; + + if (ossmix_get_description(mixnum, ctl, &desc)<0) + { + fprintf(stderr, "ossmix_get_description() failed\n"); + return; + } + + printf("%s\n", desc.strings); +} + +int +main(int argc, char *argv[]) +{ + int err, i; + char *host=NULL; + int port=7777; + int nmixers=0; + extern int mixlib_trace; + int interactive=0; + + //mixlib_trace=1; + + while ((i = getopt(argc, argv, "ip:h:")) != EOF) + switch (i) + { + case 'i': + interactive=1; + break; + case 'p': + port = atoi(optarg); + break; + + case 'h': + host=optarg; + break; + } + + if ((err=ossmix_init())<0) + { + fprintf(stderr, "ossmix_init() failed, err=%d\n"); + exit(EXIT_FAILURE); + } + + if ((err=ossmix_connect(host, port))<0) + { + fprintf(stderr, "ossmix_connect() failed, err=%d\n", err); + exit(EXIT_FAILURE); + } + + if ((nmixers=ossmix_get_nmixers())<0) + { + fprintf(stderr, "ossmix_get_nmixers() failed, err=%d\n", nmixers); + exit(EXIT_FAILURE); + } + + printf("Number of mixers=%d\n", nmixers); + + for (i=0;i<nmixers;i++) + { + oss_mixerinfo mi; + int n, ctl; + + if (ossmix_get_mixerinfo(i, &mi)<0) + { + fprintf(stderr, "ossmix_get_mixerinfo(%d) failed\n", i); + exit(EXIT_FAILURE); + } + + printf("Mixer %2d: %s\n", i, mi.name); + + if (ossmix_open_mixer(i)<0) + { + fprintf(stderr, "ossmix_open_mixer(%d) failed\n", i); + exit(EXIT_FAILURE); + } + + if ((n=ossmix_get_nrext(i))<0) + { + fprintf(stderr, "ossmix_get_nrext(%d) failed, err=\n", i, n); + exit(EXIT_FAILURE); + } + + printf("Mixer has %d nodes\n", n); + + for (ctl=0;ctl<n;ctl++) + { + oss_mixext node; + int value=0; + + if (ossmix_get_nodeinfo(i, ctl, &node)<0) + { + fprintf(stderr, "ossmix_get_nodeinfo(%d, %d) failed\n", + i, ctl); + exit(EXIT_FAILURE); + + } + + if (node.type != MIXT_DEVROOT && node.type != MIXT_GROUP && node.type != MIXT_MARKER) + if ((value=ossmix_get_value(i, ctl, node.timestamp))<0) + { + fprintf(stderr, "ossmix_get_value(%d, %d, %d) failed, err=%d\n", + i, ctl, node.timestamp, value); + } + + printf("%3d: %s = 0x%08x\n", ctl, node.extname, value); + + if (node.type == MIXT_ENUM) + print_enum_list(i, ctl); + + if (node.flags & MIXF_DESCR) + print_description(i, ctl); + + } + + if (!interactive) + ossmix_close_mixer(i); + } + + if (interactive) + interactive_mode(); + +printf("Disconnecting\n"); + ossmix_disconnect(); + + exit(EXIT_SUCCESS); +} |