#include "../output_api.h" #include "../mixer_api.h" #include <glib.h> #include <sys/stat.h> #include <sys/ioctl.h> #include <fcntl.h> #include <errno.h> #include <stdlib.h> #include <unistd.h> #if defined(__OpenBSD__) || defined(__NetBSD__) # include <soundcard.h> #else /* !(defined(__OpenBSD__) || defined(__NetBSD__) */ # include <sys/soundcard.h> #endif /* !(defined(__OpenBSD__) || defined(__NetBSD__) */ #define VOLUME_MIXER_OSS_DEFAULT "/dev/mixer" struct oss_mixer { char *device; char *control; int device_fd; int volume_control; }; static struct mixer_data * oss_mixer_init(void) { struct oss_mixer *om = g_malloc(sizeof(struct oss_mixer)); om->device = NULL; om->control = NULL; om->device_fd = -1; om->volume_control = SOUND_MIXER_PCM; return (struct mixer_data *)om; } static void oss_mixer_finish(struct mixer_data *data) { struct oss_mixer *om = (struct oss_mixer *) data; g_free(om->device); g_free(om->control); g_free(om); } static void oss_mixer_configure(struct mixer_data *data, struct config_param *param) { struct oss_mixer *om = (struct oss_mixer *) data; const char *value; if (param == NULL) return; value = config_get_block_string(param, "mixer_device", NULL); if (value != NULL) { g_free(om->device); om->device = g_strdup(value); } value = config_get_block_string(param, "mixer_control", NULL); if (value != NULL) { g_free(om->control); om->control = g_strdup(value); } } static void oss_mixer_close(struct mixer_data *data) { struct oss_mixer *om = (struct oss_mixer *) data; if (om->device_fd != -1) while (close(om->device_fd) && errno == EINTR) ; om->device_fd = -1; } static int oss_find_mixer(const char *name) { const char *labels[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_LABELS; size_t name_length = strlen(name); for (unsigned i = 0; i < SOUND_MIXER_NRDEVICES; i++) { if (strncasecmp(name, labels[i], name_length) == 0 && (labels[i][name_length] == 0 || labels[i][name_length] == ' ')) return i; } return -1; } static bool oss_mixer_open(struct mixer_data *data) { struct oss_mixer *om = (struct oss_mixer *) data; const char *device = VOLUME_MIXER_OSS_DEFAULT; if (om->device) { device = om->device; } if ((om->device_fd = open(device, O_RDONLY)) < 0) { g_warning("Unable to open oss mixer \"%s\"\n", device); return false; } if (om->control) { int i; int devmask = 0; if (ioctl(om->device_fd, SOUND_MIXER_READ_DEVMASK, &devmask) < 0) { g_warning("errors getting read_devmask for oss mixer\n"); oss_mixer_close(data); return false; } i = oss_find_mixer(om->control); if (i < 0) { g_warning("mixer control \"%s\" not found\n", om->control); oss_mixer_close(data); return false; } else if (!((1 << i) & devmask)) { g_warning("mixer control \"%s\" not usable\n", om->control); oss_mixer_close(data); return false; } om->volume_control = i; } return true; } static bool oss_mixer_control(struct mixer_data *data, int cmd, void *arg) { struct oss_mixer *om = (struct oss_mixer *) data; switch (cmd) { case AC_MIXER_CONFIGURE: oss_mixer_configure(data, (struct config_param *)arg); if (om->device_fd >= 0) oss_mixer_close(data); return true; break; case AC_MIXER_GETVOL: { int left, right, level; int *ret; if (om->device_fd < 0 && !oss_mixer_open(data)) { return false; } if (ioctl(om->device_fd, MIXER_READ(om->volume_control), &level) < 0) { oss_mixer_close(data); g_warning("unable to read oss volume\n"); return false; } left = level & 0xff; right = (level & 0xff00) >> 8; if (left != right) { g_warning("volume for left and right is not the same, \"%i\" and " "\"%i\"\n", left, right); } ret = (int *) arg; *ret = left; return true; } case AC_MIXER_SETVOL: { int new; int level; int *value = arg; if (om->device_fd < 0 && !oss_mixer_open(data)) { return false; } new = *value; if (new < 0) { new = 0; } else if (new > 100) { new = 100; } level = (new << 8) + new; if (ioctl(om->device_fd, MIXER_WRITE(om->volume_control), &level) < 0) { g_warning("unable to set oss volume\n"); oss_mixer_close(data); return false; } return true; } default: g_warning("Unsuported oss control\n"); break; } return false; } struct mixer_plugin oss_mixer = { .init = oss_mixer_init, .finish = oss_mixer_finish, .configure = oss_mixer_configure, .open = oss_mixer_open, .control = oss_mixer_control, .close = oss_mixer_close };