pulseaudio的录制和回放失败 [英] PulseAudio recording and playback fails

问题描述

我试图记录和回放采用脉冲音频API中的CentOS 6.2的音频数据。但它可记录和重放什么。我使用的的PulseAudio 一个code。我需要帮助得到它在我的电脑工作。我该怎么办？我的code也被如下 -

 下列块#ifdef HAVE_CONFIG_H
＃包括LT＆;＆config.h文件GT;
＃万一＃包括LT＆;＆stdio.h中GT;
＃包括LT＆;＆unistd.h中GT;
＃包括LT＆;＆string.h中GT;
＃包括LT＆;＆errno.h中GT;
＃包括LT＆;＆fcntl.h GT;＃包括LT＆;脉冲/ simple.h＆GT;
＃包括LT＆;脉冲/ error.h＆GT;的#define BUFSIZE 32INT主（INT ARGC，CHAR *的argv []）{/ *样本格式使用* /
静态常量pa_sample_spec SS = {
    .format = PA_SAMPLE_S16LE，
    .rate = 44100，
    .channels = 2
};pa_simple * s_in，* s_out = NULL;
INT RET = 1;
INT错误;
/ *创建一个新的播放流* /
如果（（s_out = pa_simple_new（NULL，argv的[0]，PA_STREAM_PLAYBACK，NULL，回放，＆安培;！SS，NULL，NULL，＆安培;错误）））{
    fprintf中（标准错误，__FILE__：pa_simple_new（）失败：％S \\ n，pa_strerror（错误））;
    转到整理;
}  如果（（s_in = pa_simple_new（NULL，argv的[0]，PA_STREAM_RECORD，NULL，记录，＆安培;！SS，NULL，NULL，＆安培;错误）））{
    fprintf中（标准错误，__FILE__：pa_simple_new（）失败：％S \\ n，pa_strerror（错误））;
    转到整理;
}为（;;）{
    uint8_t有BUF [BUFSIZE];
    ssiz​​e_t供ř;1＃如果
    pa_usec_t延迟;    如果（（延迟= pa_simple_get_latency（s_in，＆安培;错误））==（pa_usec_t）-1）{
        fprintf中（标准错误，__FILE__：pa_simple_get_latency（）失败：％S \\ n，pa_strerror（错误））;
        转到整理;
    }    fprintf中（标准错误，在：％0.0微秒\\ r \\ n，（浮点）延迟）;    如果（（延迟= pa_simple_get_latency（s_out，＆安培;错误））==（pa_usec_t）-1）{
        fprintf中（标准错误，__FILE__：pa_simple_get_latency（）失败：％S \\ n，pa_strerror（错误））;
        转到整理;
    }    fprintf中（标准错误，出：％0.0微秒\\ r \\ n，（浮点）延迟）;
＃万一    如果（pa_simple_read（s_in，BUF，sizeof的（BUF），放大器;错误）小于0）{        fprintf中（标准错误，__FILE__：阅读（）失败：％S \\ n字符串错误（错误））;
        转到整理;
    }    / * ...并播放* /
    如果（pa_simple_write（s_out，BUF，sizeof的（BUF），放大器;错误）小于0）{
        fprintf中（标准错误，__FILE__：pa_simple_write（）失败：％S \\ n，pa_strerror（错误））;
        转到整理;
    }
}/ *确保每一个样品被演奏* /
如果（pa_simple_drain（s_out，＆安培;误差）小于0）{
    fprintf中（标准错误，__FILE__：pa_simple_drain（）失败：％S \\ n，pa_strerror（错误））;
    转到整理;
}RET = 0;完：如果（s_in）
    pa_simple_free（s_in）;
如果（s_out）
    pa_simple_free（s_out）;返回RET;
}
 

解决方案

成功完成。这是在我的操作系统错误，因为我还没有更新了一段时间的插件。后重新安装它的工作操作系统。
谢谢

I am trying to record and playback audio data using pulse audio API in centOS 6.2. But it records and playbacks nothing. I am using a code from pulseaudio. I need help to get it working in my PC. What should I do? My code is also given below-

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>

#include <pulse/simple.h>
#include <pulse/error.h>

#define BUFSIZE 32

int main(int argc, char*argv[]) {

/* The Sample format to use */
static const pa_sample_spec ss = {
    .format = PA_SAMPLE_S16LE,
    .rate = 44100,
    .channels = 2
};

pa_simple *s_in, *s_out = NULL;
int ret = 1;
int error;


/* Create a new playback stream */
if (!(s_out = pa_simple_new(NULL, argv[0], PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &error))) {
    fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
    goto finish;
}

  if (!(s_in = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, NULL, "record", &ss, NULL, NULL, &error))) {
    fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
    goto finish;
}

for (;;) {
    uint8_t buf[BUFSIZE];
    ssize_t r;

#if 1
    pa_usec_t latency;

    if ((latency = pa_simple_get_latency(s_in, &error)) == (pa_usec_t) -1) {
        fprintf(stderr, __FILE__": pa_simple_get_latency() failed: %s\n", pa_strerror(error));
        goto finish;
    }

    fprintf(stderr, "In:  %0.0f usec    \r\n", (float)latency);

    if ((latency = pa_simple_get_latency(s_out, &error)) == (pa_usec_t) -1) {
        fprintf(stderr, __FILE__": pa_simple_get_latency() failed: %s\n", pa_strerror(error));
        goto finish;
    }

    fprintf(stderr, "Out: %0.0f usec    \r\n", (float)latency);
#endif

    if (pa_simple_read(s_in, buf, sizeof(buf), &error) < 0) {

        fprintf(stderr, __FILE__": read() failed: %s\n", strerror(errno));
        goto finish;
    }

    /* ... and play it */
    if (pa_simple_write(s_out, buf, sizeof(buf), &error) < 0) {
        fprintf(stderr, __FILE__": pa_simple_write() failed: %s\n", pa_strerror(error));
        goto finish;
    }
}

/* Make sure that every single sample was played */
if (pa_simple_drain(s_out, &error) < 0) {
    fprintf(stderr, __FILE__": pa_simple_drain() failed: %s\n", pa_strerror(error));
    goto finish;
}

ret = 0;

finish:

if (s_in)
    pa_simple_free(s_in);
if (s_out)
    pa_simple_free(s_out);

return ret;
}

解决方案

Successfully done. It was an error in my OS, because I haven't updated the plugins for a while. After re-installing the OS it worked. Thanks

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