# 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...
snd_pcm_hw_params_set_rate_near(sound->handle, hwparams, &extra_rate, 0); snd_pcm_uframes_t buffer_size; snd_pcm_hw_params_get_buffer_size_max(hwparams, &buffer_size); snd_pcm_hw_params_set_buffer_size_near(sound->handle, hwparams, &buffer_size); snd_pcm_uframes_t period_size...
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 ...
r = snd_pcm_hw_params_set_rate_near(m_audio_handle, hw_params, &rate,0); r = snd_pcm_hw_params_set_channels(m_audio_handle, hw_params,2); r = snd_pcm_hw_params(m_audio_handle, hw_params); snd_pcm_hw_params_free(hw_params); ...
问snd_pcm_hw_params_set_buffer_size()错误：“无效参数”EN回发或回调参数无效。在配置中使用 <...
确保你传递给snd_pcm_hw_params_set_xxx函数的参数(如采样率、缓冲区大小、周期大小等)在音频设备的支持范围内。例如,某些音频设备可能不支持非常高的采样率或非常大的缓冲区。 你可以使用snd_pcm_hw_params_get_xxx_min和snd_pcm_hw_params_get_xxx_max函数来获取设备支持的最小和最大参数值。 检查其他ALSA...
params); snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED); snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE); snd_pcm_hw_params_set_channels(handle, params, 1); snd_pcm_hw_params_set_rate_near(handle, params, 44100, 0); snd_pcm_hw...
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...
alsa_driver.c: In function `alsa_driver_configure_stream': alsa_driver.c:394: warning: passing arg 3 of `snd_pcm_hw_params_set_rate_near' makes integer from pointer without a cast I am copying this response to alsa-devel. If I'm wrong, someone there will probably set me straight. :...
> 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...