unsigned int period_size = 1024; // 设置周期大小为1024个样本点 int dir; // 设置 PCM 设备的周期大小 err = snd_pcm_hw_params_set_period_size_near(pcm_handle, pcm_params, &period_size, &dir); // 检查设置周期大小是否成功 if (err < 0) { fprintf(stderr, "Can't set period size: ...
staticvoidalsa_log(snd_pcm_hw_params_t* hw_params,snd_pcm_sw_params_t* sw_params){unsignedperiod_time;snd_pcm_uframes_tperiod_size;unsignedperiod_count;unsignedbuffer_time;snd_pcm_uframes_tbuffer_size;unsignedtick_time;snd_pcm_uframes_txfer_align; snd_pcm_hw_params_get_period_time(hw_...
(void) file;#if0snd_pcm_hw_params_t*hw_params;snd_pcm_format_tformat;intrate =0;if(snd_pcm_hw_params_malloc (&hw_params) <0)return-1;if(snd_pcm_hw_params_any (handle, hw_params) <0) {snd_pcm_hw_params_free(hw_params);return-1; }if(snd_pcm_hw_params_set_access (handle,...
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...
PCM操作句柄,这是一个成员不公开的结构: /** PCM handle */typedefstruct_snd_pcmsnd_pcm_t; 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...
函数snd_pcm_close()用于关闭PCM设备,函数原型如下所示: int snd_pcm_close(snd_pcm_t *pcm); 设置硬件参数 主要是对采样率、声道数、格式、访问类型、period周期大小、buffer大小等进行配置。 实例化snd_pcm_hw_params_t对象 使用snd_pcm_hw_params_malloc或snd_pcm_hw_params_alloca()来实例化一个snd_pcm...
[Alsa-devel] problem with "snd_pcm_hw_params_set_period_size_near" James Courtier-Dutton Mon, 29 Sep 2003 14:53:55 -0700 if the buffer size has already been set to 16384, and the period_size is trying to be set to 8196, why do I get the following results: -period_size=8196...
(handle, params, SND_PCM_FORMAT_S16_LE); /* Two channels (stereo) */ snd_pcm_hw_params_set_channels(handle, params, 2); /* 44100 bits/second sampling rate (CD quality) */ val = 44100; snd_pcm_hw_params_set_rate_near(handle, params, &val, &dir); /* Set period size to 32...
检查缓冲区大小:确保传递给 snd_pcm_readi 的缓冲区大小与音频参数相匹配。通常,缓冲区大小应该是音频帧数的整数倍。c unsigned int frames_to_read = 32; // 示例帧数 snd_pcm_uframes_t frames; snd_pcm_hw_params_get_period_size(params, &frames, NULL); unsigned int buffer_size = frames *...
同时，谷歌也发布了ARCore，让开发者可以为Android设备开发应用，预计将有1亿台Android手机可以体验到AR...