inline static void debug_style(lua_State *L, const char *path, const char *key) {
if (!IS_LOG_PRIORITY(log_ui_draw, LOG_PRIORITY_DEBUG)) {
return;
}
lua_getglobal(L, "tostring");
lua_pushvalue(L, -2);
lua_call(L, 1, 1);
lua_getglobal(L, "tostring");
lua_pushvalue(L, 1);
lua_call(L, 1, 1);
LOG_DEBUG(log_ui_draw, "style: [%s] %s : %s = %s", lua_tostring(L, -1), path, key, lua_tostring(L, -2));
lua_pop(L, 2);
}
static pid_t decode_alsa_fork(const char *device, const char *capture, unsigned int buffer_time, unsigned int period_count, unsigned int sample_size, u32_t flags)
{
char *path, b[10], p[10], f[10], s[10];
char *cmd[20];
pid_t pid;
int i, idx = 0, ret;
path = alloca(PATH_MAX);
/* jive_alsa [-v] -d <device> -b <buffer_time> -p <period_count> -f <flags> */
cmd[idx++] = "jive_alsa";
if (IS_LOG_PRIORITY(log_audio_output, LOG_PRIORITY_DEBUG)) {
cmd[idx++] = "-v";
}
cmd[idx++] = "-d";
cmd[idx++] = (char *)device;
if (capture) {
cmd[idx++] = "-c";
cmd[idx++] = (char *)capture;
}
snprintf(b, sizeof(b), "%d", buffer_time);
cmd[idx++] = "-b";
cmd[idx++] = b;
snprintf(p, sizeof(p), "%d", period_count);
cmd[idx++] = "-p";
cmd[idx++] = p;
snprintf(s, sizeof(s), "%d", sample_size);
cmd[idx++] = "-s";
cmd[idx++] = s;
snprintf(f, sizeof(f), "%d", flags);
cmd[idx++] = "-f";
cmd[idx++] = f;
cmd[idx] = '\0';
if (IS_LOG_PRIORITY(log_audio_output, LOG_PRIORITY_DEBUG)) {
path[0] = '\0';
for (i=0; i<idx; i++) {
strncat(path, cmd[i], PATH_MAX);
strncat(path, " ", PATH_MAX);
}
LOG_DEBUG(log_audio_output, "fork %s", path);
}
/* command path */
getcwd(path, PATH_MAX);
strncat(path, "/jive_alsa", PATH_MAX);
decode_audio_lock();
decode_audio->running = false;
/* fork + exec */
pid = vfork();
if (pid < 0) {
LOG_ERROR(log_audio_output, "fork failed %d", errno);
return -1;
}
if (pid == 0) {
/* child */
ret = execv(path, cmd);
LOG_ERROR(log_audio_output, "execv failed %d", errno);
_exit(-1);
}
/* wait for backend process to start */
while (1) {
fifo_wait_timeout(&decode_audio->fifo, 500);
if (decode_audio->running) {
break;
}
if (waitpid(pid, NULL, WNOHANG) == pid) {
decode_audio_unlock();
LOG_ERROR(log_audio_output, "%s failed to start", cmd[0]);
return -1;
}
}
decode_audio_unlock();
return pid;
}
