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: %s\n", snd_strerror(err)); exit(EXIT_FAILURE); } ``` ### 步骤 5:应用参数设置到 PCM 设备 ```c...
snd_pcm_sw_params_set_start_threshold函数用于设置PCM设备的软件参数的起始阈值。它接受一个指向snd_pcm_sw_params结构的指针,一个pcm设备描述符,一个软件参数标识符,以及一个起始阈值作为参数。起始阈值是一个介于0和1之间的浮点数,用于控制软件触发模式的敏感度。 二、函数使用方法 要使用snd_pcm_sw_params_se...
int snd_pcm_sw_params_set_start_threshold(snd_pcm_t *pcm, snd_pcm_sw_params_t *params, snd_pcm_uframes_t val) 参数说明: - pcm:用于指定音频设备句柄,已打开的PCM设备。 - params:用于指定音频设备的软件参数句柄。 - val:用于指定起始阈值的值,单位为frame。 在调用该函数之前,需要先通过snd_pc...
snd_pcm_hw_params_set_buffer_size()是一个函数,用于设置音频设备的缓冲区大小。它属于ALSA(Advanced Linux Sound Architecture)音频驱动程序的一部分,用于在Linux系统上进行音频处理。 该函数的错误“无效参数”表示传递给函数的参数无效或不符合要求。可能的原因包括传递的缓冲区大小超出了设备的支持范围...
示例1: setparams_periods ▲点赞 9▼ staticintsetparams_periods(snd_pcm_t*handle,snd_pcm_hw_params_t*params,unsignedint*usecs,unsignedint*count,constchar*id){interr; err =snd_pcm_hw_params_set_period_time_near(handle, params, usecs,0);if(err <0) {fprintf(error_fp,"alsa: Unable t...
ALSA lib pcm.c:8382:(snd_pcm_set_params) Sample format not available for PLAYBACK: Invalid argument thread '' panicked at 'called Option::unwrap() on a None value', src/libcore/option.rs:323 note: Run with RUST_BACKTRACE=1 for a backtrace. Any help is highly appreciated. Many thanks...
SND_PCM_FORMAT_S16))) errx(EXIT_FAILURE,"Audio: Could not set sample format to signed 16 bit ""native endian: %s", snd_strerror(err));if(0> (err = snd_pcm_hw_params_set_rate_near(playback_handle, hw_params, &rate,0))) ...
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...
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: BackendSpecific { err: BackendSpecificError { description: "ALSA function 'snd_pcm_hw_params_set_buffer_size' failed with error 'EINVAL: Invalid argument'" } }', src/main.rs:25:10 ...
[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...