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_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...
snd_pcm_hw_params_get_period_time(params, &val, &dir); printf("period time = %d us\n", val); snd_pcm_hw_params_get_period_size(params, &frames, &dir); printf("period size = %d frames\n", (int)frames); snd_pcm_hw_params_get_buffer_time(params, &val, &dir); printf("buffe...
snd_pcm_hw_params_get_period_size(params, frame, 0); } int init_udp_sockfd(int *sockfd,struct sockaddr_in *s_addr,int argc,char **argv) { if(argc < 1) { printf("input error\n"); exit(0); } if((*sockfd = socket(AF_INET,SOCK_DGRAM,0)) < 0) ...
ALSA lib pcm.c:2145:(snd_pcm_open_noupdate) Unknown PCM default aplay: main:546: audio open error: No such file or directory --with-plugindir也是同样道理了.它是设为ALSA_PLUGIN_DIR宏. 编译make 安装make install 开发板发布注意: 在开发板上发布alsa库.除了libasound.so库以外,必须还要把alsa.co...
snd_pcm_hw_params_get_period_size(params,&frames, &dir);printf("period size = %d frames/n", (int)frames);snd_pcm_hw_params_get_buffer_time(params,&val, &dir);printf("buffer time = %d us/n", val);snd_pcm_hw_params_get_buffer_size(params,(snd_pcm_uframes_t *) &val);printf...
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_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;...
snd_pcm_hw_params_get_period_size(params, &frames, &dir); /* 因为我们是16位 两个通道,所以要 *2*2 也就是 *4 */ size = frames * 4; /* 2 bytes/sample, 2 channels */ buffer = (char *) malloc(size); /* We want to loop for 5 seconds */ ...