initial commit
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commit
006cfa84a5
BIN
audio_play
Executable file
BIN
audio_play
Executable file
Binary file not shown.
164
audio_play.c
Normal file
164
audio_play.c
Normal file
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#include <stdio.h>
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#include <stdlib.h>
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#include <alsa/asoundlib.h>
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void check_and_set_max_volume()
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{
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FILE *fp;
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char buffer[256];
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int volume_left = -1;
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int speaker_on = 0;
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// 检查 PCM 音量
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fp = popen("amixer get PCM | grep 'Front Left'", "r");
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if (fp)
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{
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while (fgets(buffer, sizeof(buffer), fp))
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{
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if (sscanf(buffer, " Front Left: %d", &volume_left) == 1)
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{
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break;
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}
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}
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pclose(fp);
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}
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if (volume_left == -1)
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{
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printf("无法获取音量信息\n");
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}
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else if (volume_left < 192)
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{
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printf("当前音量为 %d，设置为最大...\n", volume_left);
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system("amixer set PCM 192");
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}
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else
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{
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printf("音量已是最大（%d）\n", volume_left);
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}
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// 检查扬声器是否开启
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fp = popen("amixer get Speaker | grep 'Mono:'", "r");
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if (fp)
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{
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while (fgets(buffer, sizeof(buffer), fp))
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{
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if (strstr(buffer, "[on]"))
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{
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speaker_on = 1;
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break;
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}
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}
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pclose(fp);
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}
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if (!speaker_on)
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{
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printf("扬声器未打开，正在开启...\n");
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system("amixer set Speaker unmute");
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}
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else
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{
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printf("扬声器已开启\n");
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}
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}
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int main(int argc, char *argv[])
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{
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check_and_set_max_volume();
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const char *device = "hw:0,0"; // 要使用的 ALSA 设备
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const char *filename = "001.wav"; // WAV 文件路径
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snd_pcm_t *pcm_handle;
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snd_pcm_hw_params_t *params;
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unsigned int sample_rate = 44100; // 采样率（需与 WAV 文件一致）
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int pcm, dir;
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snd_pcm_uframes_t frames;
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FILE *file;
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char *buffer;
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int buffer_size;
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// 打开音频文件
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file = fopen(filename, "rb");
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if (!file)
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{
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perror("Unable to open audio file");
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return 1;
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}
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// 跳过标准 WAV 头部（44 字节），如果你的音频文件已经是纯 PCM 数据可以注释掉此行
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fseek(file, 44, SEEK_SET);
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// 打开 PCM 设备
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if ((pcm = snd_pcm_open(&pcm_handle, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0)
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{
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fprintf(stderr, "Unable to open PCM device %s: %s\n", device, snd_strerror(pcm));
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fclose(file);
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return 1;
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}
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// 分配并初始化硬件参数对象
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snd_pcm_hw_params_alloca(¶ms);
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snd_pcm_hw_params_any(pcm_handle, params);
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snd_pcm_hw_params_set_access(pcm_handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
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snd_pcm_hw_params_set_format(pcm_handle, params, SND_PCM_FORMAT_S16_LE);
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snd_pcm_hw_params_set_channels(pcm_handle, params, 2);
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snd_pcm_hw_params_set_rate_near(pcm_handle, params, &sample_rate, &dir);
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// 应用硬件参数
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if ((pcm = snd_pcm_hw_params(pcm_handle, params)) < 0)
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{
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fprintf(stderr, "Unable to set hardware parameters: %s\n", snd_strerror(pcm));
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snd_pcm_close(pcm_handle);
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fclose(file);
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return 1;
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}
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// 获取每个周期（period）的帧数，并据此计算缓冲区大小
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snd_pcm_hw_params_get_period_size(params, &frames, &dir);
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buffer_size = frames * 2 /*bytes per sample*/ * 2 /*channels*/;
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buffer = (char *)malloc(buffer_size);
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if (!buffer)
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{
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fprintf(stderr, "Unable to allocate buffer\n");
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snd_pcm_close(pcm_handle);
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fclose(file);
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return 1;
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}
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// 无限循环播放
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while (1)
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{
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size_t bytes_read = fread(buffer, 1, buffer_size, file);
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if (bytes_read == 0)
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{
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// 已经读到文件末尾，重新回到数据区的起始位置（跳过头部）
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fseek(file, 44, SEEK_SET);
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continue;
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}
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// 计算本次要写入的“帧”数，如果最后一块数据不足一个完整周期，按实际读到的字节数计算
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snd_pcm_uframes_t frames_to_deliver = bytes_read / (2 * 2);
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// 写入 PCM
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int ret = snd_pcm_writei(pcm_handle, buffer, frames_to_deliver);
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if (ret == -EPIPE)
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{
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// 缓冲区下溢，重启 PCM 设备
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snd_pcm_prepare(pcm_handle);
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}
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else if (ret < 0)
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{
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fprintf(stderr, "Playback error: %s\n", snd_strerror(ret));
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}
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// 如果写入的帧数小于需要的，可以在这里处理（可选）
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}
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// 下面的代码理论上永远不会执行到，但为了完整性保留
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free(buffer);
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snd_pcm_drain(pcm_handle);
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snd_pcm_close(pcm_handle);
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fclose(file);
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return 0;
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}
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BIN
voice_guard
Executable file
BIN
voice_guard
Executable file
Binary file not shown.
163
voice_guard.c
Normal file
163
voice_guard.c
Normal file
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <time.h>
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#include <arpa/inet.h>
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#include <sys/socket.h>
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#include <signal.h>
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#include <sys/wait.h>
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#define PORT 9999
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#define TIMEOUT 3
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pid_t play_pid = 0;
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// 启动播放
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void start_playback()
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{
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if (play_pid == 0)
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{
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play_pid = fork();
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if (play_pid == 0)
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{
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execl("./audio_play", "./audio_play", NULL);
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perror("execl failed");
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exit(1);
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}
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printf("播放进程已启动，PID=%d\n", play_pid);
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}
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}
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// 停止播放
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void stop_playback()
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{
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if (play_pid > 0)
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{
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printf("停止播放，终止 PID=%d\n", play_pid);
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kill(play_pid, SIGTERM);
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waitpid(play_pid, NULL, 0);
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play_pid = 0;
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}
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}
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int main()
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{
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int listen_fd, conn_fd;
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struct sockaddr_in addr;
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char buffer[128];
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time_t last_time = 0;
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int playing = 0;
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fd_set read_fds;
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struct timeval tv;
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listen_fd = socket(AF_INET, SOCK_STREAM, 0);
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if (listen_fd < 0)
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{
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perror("socket error");
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return 1;
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}
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int opt = 1;
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setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(PORT);
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addr.sin_addr.s_addr = htonl(INADDR_ANY);
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if (bind(listen_fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
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{
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perror("bind error");
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close(listen_fd);
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return 1;
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}
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if (listen(listen_fd, 5) < 0)
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{
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perror("listen error");
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close(listen_fd);
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return 1;
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}
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printf("语音守护 TCP 服务器已启动，监听端口 %d...\n", PORT);
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while (1)
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{
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printf("等待客户端连接...\n");
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conn_fd = accept(listen_fd, NULL, NULL);
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if (conn_fd < 0)
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{
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perror("accept error");
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continue;
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}
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printf("客户端已连接\n");
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last_time = 0;
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playing = 0;
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// 设置非阻塞模式
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fcntl(conn_fd, F_SETFL, O_NONBLOCK);
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while (1)
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{
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FD_ZERO(&read_fds);
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FD_SET(conn_fd, &read_fds);
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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int ret = select(conn_fd + 1, &read_fds, NULL, NULL, &tv);
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if (ret > 0 && FD_ISSET(conn_fd, &read_fds))
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{
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ssize_t len = read(conn_fd, buffer, sizeof(buffer) - 1);
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if (len > 0)
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{
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buffer[len] = '\0';
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if (strstr(buffer, "RUNNING"))
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{
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last_time = time(NULL);
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if (!playing)
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{
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printf("收到心跳，启动播报...\n");
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start_playback();
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playing = 1;
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}
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}
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}
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else if (len == 0)
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{
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printf("客户端关闭连接\n");
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break;
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}
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}
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else if (ret == 0)
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{
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// 超时
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if (playing && (time(NULL) - last_time > TIMEOUT))
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{
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printf("超时未收到心跳，停止播报...\n");
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stop_playback();
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playing = 0;
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}
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}
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else
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{
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perror("select error");
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break;
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}
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}
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close(conn_fd);
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// 断开连接时停止播放
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if (playing)
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{
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printf("连接断开，停止播放\n");
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stop_playback();
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playing = 0;
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}
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}
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close(listen_fd);
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return 0;
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}
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