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_...
# 使用 snd_pcm_hw_params_set_period_size_near 设置 PCM 设备的周期大小 在使用 K8S 开发中,有时需要设置 PCM 设备的周期大小,这时就可以使用 `snd_pcm_hw_params_set_period_size_near` 函数来实现。本文将详细介绍如何通过该函数设置 PCM 设备的周期大小,并给出相应的代码示例。 ## 整体流程 下表总结...
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_p...
err = snd_pcm_hw_params_set_rate_near( g_alsa_playback_handle, hw_params, (unsignedint*)&freq,0);if( err <0) { DBG("ALSA ERROR: Can't set sample rate: "<< snd_strerror( err ) );returnfalse; } DBG("ALSA Sample rate: "<< freq ); err =snd_pcm_hw_params_set_channels( ...
> 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_pcm_hw_params_set_rate_near(pcm_handle,...
if(snd_pcm_hw_params_set_rate_near(handle,params,&rate,&dir)!=0){// 设置采样率 fprintf(stderr,"Can't set sample rate\n"); exit(EXIT_FAILURE); } unsignedintchannels=2;// 设置通道数为2 if(snd_pcm_hw_params_set_channels(handle,params,channels)!=0){// 设置通道数 ...
PCM硬件参数,这是一个成员不公开的结构: typedefstruct_snd_pcm_hw_paramssnd_pcm_hw_params_t; PCM的流类型,主要指播放和录音两种: /** PCM stream (direction) */typedefenum_snd_pcm_stream{/** Playback stream */SND_PCM_STREAM_PLAYBACK=0,/** Capture stream */SND_PCM_STREAM_CAPTURE,SND_PCM...
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(). Now with internal card both iterations report 7 supported rates whi...
Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924 Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi...
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...