snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED); /* Signed 16-bit little-endian format */ snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE); /* Two channels (stereo)
snd_pcm_hw_params_get_period_size(params, &frames, &dir); size = frames * 4; /* 2 bytes/sample, 2 channels */ printf("size = %d\n",size); buffer = (char *) malloc(size); /* We want to loop for 5 seconds */ snd_pcm_hw_params_get_period_time(params, &val, &dir); lo...
snd_pcm_hw_params_set_rate_near( pcm_handle, hw_params, 44100, 0); //设置采样率为44.1KHz snd_pcm_hw_params_set_channels( pcm_handle, hw_params, 2); //设置为立体声 snd_pcm_hw_params_get_period_size( hw_params, &period_size); //获取周期长度 bit_per_sample = snd_pcm_hw_format...
snd_pcm_access_name((snd_pcm_access_t)val)); snd_pcm_hw_params_get_format(params, &val); printf("format = '%s' (%s)\n", snd_pcm_format_name((snd_pcm_format_t)val), snd_pcm_format_description( (snd_pcm_format_t)val)); snd_pcm_hw_params_get_subformat(params, (snd_pcm_sub...
snd_pcm_hw_params_set_rate_near( pcm_handle, hw_params, 44100, 0); //设置采样率为44.1KHz snd_pcm_hw_params_set_channels( pcm_handle, hw_params, 2); //设置为立体声 snd_pcm_hw_params_get_period_size( hw_params, &period_size); //获取周期长度 bit_per_sample = snd_pcm_hw_format...
{err=snd_pcm_hw_params_get_buffer_time_max(params,&buffer_time,0);OSA_assert(err>=0);/* in microsecond */if(buffer_time>500000)buffer_time=500000;/* 500ms */}if(buffer_time>0)period_time=buffer_time/4;if(period_time>0)err=snd_pcm_hw_params_set_period_time_near(handle,params,...
snd_pcm_hw_params_get_period_size(params, &frames, &dir); std::cout << "period size = " << static_cast<int>(frames) << " frames" << std::endl; snd_pcm_hw_params_get_buffer_time(params, &val, &dir); std::cout << "buffer time = " << val << " us" << std::endl;...
params, 1); /* 44100 bits/second sampling rate (CD quality) */ val = 16000; snd_pcm_hw_params_set_rate_near(handle, params, &val, &dir); /* Set period size to 32 frames. */ frames =20;/*一次送人的帧太少,会下溢冲(至少15帧)*/ // snd_pcm_hw_params_set_period_size_near(...
perror("\nsnd_pcm_hw_params_set_rate_near:"); exit(1); } rc = snd_pcm_hw_params(handle, params); if(rc<0) { perror("\nsnd_pcm_hw_params: "); exit(1); } rc=snd_pcm_hw_params_get_period_size(params, &frames, &dir); /*获取周期 ...
98.error(_("Unable to install hw params:")); 99.snd_pcm_hw_params_dump(params, log); 100.exit(EXIT_FAILURE); 101.} 102.snd_pcm_hw_params_get_period_size(params, &chunk_size, 0); 103.snd_pcm_hw_params_get_buffer_size(params, &buffer_size); 104.if (chunk_size == buffer_siz...