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_set_channels(handle, params, 2); /* 44100 ...
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_set_channels(handle, params, 2); /* 44100 ...
snd_pcm_hw_params_alloca(¶ms);//分配params结构体ret= snd_pcm_hw_params_any(handle,params);//初始化paramsif(ret<0) { printf("snd_pcm_hw_params_any err\n"); } ret= snd_pcm_hw_params_set_access(handle,params, \ SND_PCM_ACCESS_RW_INTERLEAVED);//初始化访问权限if(ret<0) { pr...
snd_pcm_hw_params_malloc( ) 在栈中分配 snd_pcm_hw_params_t 结构的空间,然后使用 snd_pcm_hw_params_any( ) 函数用声卡的全配置空间参数初始化已经分配的 snd_pcm_hw_params_t 结构。snd_pcm_hw_params_set_access ( ) 设置访问类型,常用访问类型的宏定义有: SND_PCM_ACCESS_RW_INTERLEAVED 交错访问。
PCM的访问类型,暂时主要关注SND_PCM_ACCESS_RW_INTERLEAVED交错排列和SND_PCM_ACCESS_RW_NONINTERLEAVED非交错排列: /** PCM access type */typedefenum_snd_pcm_access{/** mmap access with simple interleaved channels */SND_PCM_ACCESS_MMAP_INTERLEAVED=0,/** mmap access with simple non interleaved channe...
snd_strerror (err)); exit (1); } //4.初始化访问权限 if ((err = snd_pcm_hw_params_set_access(capture_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) { fprintf (stderr, "cannot set accesstype (%s)\n", snd_strerror (err)); ...
/* Interleaved mode */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_set_channels(handle, params, 2...
snd_pcm_hw_params_malloc (¶ms); snd_pcm_hw_params_any ( pcm_handle, hw_params ); //参数初始化 snd_pcm_hw_params_set_access ( pcm_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED); //设置为交错模式 snd_pcm_hw_params_set_format( pcm_handle, hw_params, SND_FORMAT_S16_LE);...
printf("无法打开录音设备: %s\n", snd_strerror(err)); return 1; } // 分配和设置硬件参数对象 snd_pcm_hw_params_alloca(¶ms); snd_pcm_hw_params_any(handle, params); snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED); snd_pcm_hw_params_set_format(handle,...
snd_pcm_hw_params_set_access ( pcm_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED); //设置为交错模式 snd_pcm_hw_params_set_format( pcm_handle, hw_params, SND_FORMAT_S16_LE); //使用用16位样本 snd_pcm_hw_params_set_rate_near( pcm_handle, hw_params, 44100, 0); //设置采样率...