staticintsetparams_periods(snd_pcm_t*handle,snd_pcm_hw_params_t*params,unsignedint*usecs,unsignedint*count,constchar*id){interr; err =snd_pcm_hw_params_set_period_time_near(handle, params, usecs,0);if(err <0) {fprintf(error_fp,"alsa: Unable to set period time %u for %s: %s\n...
tmp = spSettings_->periods_;if( (err = snd_pcm_hw_params_set_periods (*spPCMHandle, hwparams, tmp,0)) <0)throwstd::runtime_error (snd_strerror (err)); buffersize_return = spSettings_->periodSize_ * spSettings_->periods_;if( (err = snd_pcm_hw_params_set_buffer_size_near (*...
unsigned int period_size = 1024; // 设置周期大小为1024个样本点 int dir; // 设置 PCM 设备的周期大小 err = snd_pcm_hw_params_set_period_size_near(pcm_handle, pcm_params, &period_size, &dir); // 检查设置周期大小是否成功 if (err < 0) { fprintf(stderr, "Can't set period size: ...
如果数据有效并且是预期的，则使用 ClientScriptManager.RegisterForEventValidation 方法来注册回发或回调数据...
同时，谷歌也发布了ARCore，让开发者可以为Android设备开发应用，预计将有1亿台Android手机可以体验到AR...
(1); } /* Use a buffer large enough to hold one period */ snd_pcm_hw_params_get_period_size(params, &frames, &dir); size = frames * 4; /* 2 bytes/sample, 2 channels */ buffer = (char *) malloc(size); /* We want to loop for 5 seconds */ snd_pcm_hw_params_get_...
- pcm:用于指定音频设备句柄,已打开的PCM设备。 - params:用于指定音频设备的软件参数句柄。 - val:用于指定起始阈值的值,单位为frame。 在调用该函数之前,需要先通过snd_pcm_open函数打开音频设备,并通过snd_pcm_sw_params_malloc函数分配软件参数句柄,然后通过snd_pcm_sw_params_current函数将当前参数配置装载到参...
[Alsa-devel] problem with "snd_pcm_hw_params_set_period_size_near" James Courtier-Dutton Mon, 29 Sep 2003 14:53:55 -0700 if the buffer size has already been set to 16384, and the period_size is trying to be set to 8196, why do I get the following results: -period_size=8196...
snd_pcm_sw_params_set_start_threshold函数用于设置PCM设备的软件参数的起始阈值。它接受一个指向snd_pcm_sw_params结构的指针,一个pcm设备描述符,一个软件参数标识符,以及一个起始阈值作为参数。起始阈值是一个介于0和1之间的浮点数,用于控制软件触发模式的敏感度。 二、函数使用方法 要使用snd_pcm_sw_params_se...
snd_pcm_open() snd_pcm_hw_params_any() iterate snd_pcm_hw_params_test_rate() to check for supported rates snd_pcm_hw_params_set_rate_near(44100) snd_pcm_hw_params() snd_pcm_hw_params_any() iterate snd_pcm_hw_params_test_rate() to check for supported rates In essence supported...