snd_pcm_hw_params_t *pcm_params; // 分配 PCM 参数结构 err = snd_pcm_hw_params_malloc(&pcm_params); // 检查参数结构分配是否成功 if (err < 0) { fprintf(stderr, "Error allocating PCM parameters: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } ``` ### 步骤 3:初始化 PCM ...
snd_pcm_hw_params_set_channels(handle, params,2);unsignedrate =44100;intdir; snd_pcm_hw_params_set_rate_near(handle, params, &rate, &dir);snd_pcm_uframes_tperiod = (int)rate; snd_pcm_hw_params_set_period_size_near(handle, params, &period, &dir); sample_size = rate;if(snd_pcm_...
{snd_pcm_t* pcm_handle;snd_pcm_hw_params_t* hwparams;snd_pcm_uframes_tbuffersize_return;unsignedinttmp;interr;std::unique_ptr<PCMHandle> spPCMHandle {newPCMHandle {spSettings_->pcmName_, SND_PCM_STREAM_CAPTURE}}; QObject::connect (spPCMHandle.get(), &PCMThread::PCMHandle::sigDebug...
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...
我们进行手动的编写close()方法进行关闭，然而，每次这些写会造成代码冗余不优雅，JDK中对于释放资源有...
snd_pcm_avail_update()函数 PCM异步播放示例 PCM异步录音示例 使用poll()函数 使用poll I/O多路复用实现读写 PCM播放示例 PCM录音示例 PCM设备状态 PCM播放——加入状态控制 snd_pcm_readi/snd_pcm_writei错误处理 混音器设置 打开混音器 Attach关联设备 注册 加载 查找元素 获取/更改元素 示例程序 回环测试例程...
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: BackendSpecific { err: BackendSpecificError { description: "ALSA function 'snd_pcm_hw_params_set_buffer_size' failed with error 'EINVAL: Invalid argument'" } }', src/main.rs:25:10 ...
According to the alsa documentation, the return value of snd_hw_params_set_rate_near is the 'approximate chosen rate', and the 3rd arg being type 'int'. The two tutorials at the documentation section of the alsa-project website both hold true to this with code like:exact_rate = snd_...
[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_hw_params() snd_pcm_hw_params_any() iterate snd_pcm_hw_params_test_rate() to check for supported rates In essence supported sample rates are queried twice, always with snd_pcm_hw_params_any() before them, but separated by snd_pcm_hw_params_set_rate_near(). ...