mirror of
https://github.com/alsa-project/alsa-lib.git
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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
#include <stdio.h>
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#include <malloc.h>
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#include "../include/asoundlib.h"
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#define AU_FILE "/home/ftp/pub/audio/AlwaysOnTheRun.au"
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static void show_playback_status(void *handle)
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{
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snd_pcm_playback_status_t pstatus;
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if (snd_pcm_playback_status(handle, &pstatus) < 0) {
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perror("playback status");
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return;
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}
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printf("PCM playback status:\n");
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printf(" rate = %i\n", pstatus.rate);
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printf(" fragments = %i\n", pstatus.fragments);
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printf(" fragment_size = %i\n", pstatus.fragment_size);
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printf(" count = %i\n", pstatus.count);
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printf(" queue = %i\n", pstatus.queue);
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printf(" underrun = %i\n", pstatus.underrun);
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printf(" time = %i.%i\n", (int) pstatus.time.tv_sec, (int) pstatus.time.tv_usec);
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printf(" stime = %i.%i\n", (int) pstatus.stime.tv_sec, (int) pstatus.stime.tv_usec);
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printf(" scount = %i\n", pstatus.scount);
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}
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void main(void)
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{
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int card = 0, device = 0, err, fd, count, count1, size, idx;
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void *handle;
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snd_pcm_format_t format;
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snd_pcm_playback_status_t status;
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char *buffer, *buffer1;
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buffer = (char *) malloc(512 * 1024);
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if (!buffer)
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return;
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if ((err = snd_pcm_open(&handle, card, device, SND_PCM_OPEN_PLAYBACK)) < 0) {
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fprintf(stderr, "open failed: %s\n", snd_strerror(err));
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return;
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}
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format.format = SND_PCM_SFMT_MU_LAW;
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format.rate = 8000;
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format.channels = 1;
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if ((err = snd_pcm_playback_format(handle, &format)) < 0) {
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fprintf(stderr, "format setup failed: %s\n", snd_strerror(err));
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snd_pcm_close(handle);
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return;
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}
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if ((err = snd_pcm_playback_status(handle, &status)) < 0) {
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fprintf(stderr, "status failed: %s\n", snd_strerror(err));
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snd_pcm_close(handle);
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return;
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}
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fd = open(AU_FILE, O_RDONLY);
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if (fd < 0) {
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perror("open file");
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snd_pcm_close(handle);
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return;
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}
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idx = 0;
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count = read(fd, buffer, 512 * 1024);
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if (count <= 0) {
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perror("read from file");
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snd_pcm_close(handle);
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return;
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}
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close(fd);
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if (!memcmp(buffer, ".snd", 4)) {
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idx = (buffer[4] << 24) | (buffer[5] << 16) | (buffer[6] << 8) | (buffer[7]);
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if (idx > 128)
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idx = 128;
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if (idx > count)
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idx = count;
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}
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buffer1 = buffer + idx;
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count -= idx;
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if (count < 256 * 1024) {
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perror("small count < 256k");
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snd_pcm_close(handle);
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return;
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}
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count1 = status.fragment_size * 12;
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show_playback_status(handle);
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size = snd_pcm_write(handle, buffer1, count1);
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sleep(2);
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show_playback_status(handle);
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printf("Pause.. Bytes written %i from %i...\n", size, count1);
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count -= count1;
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buffer1 += count1;
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snd_pcm_playback_pause(handle, 1);
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show_playback_status(handle);
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sleep(5);
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printf("Pause end..\n");
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snd_pcm_playback_pause(handle, 0);
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show_playback_status(handle);
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size = snd_pcm_write(handle, buffer1, count);
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printf("Pause end.. Bytes written %i from %i...\n", size, count);
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snd_pcm_close(handle);
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free(buffer);
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}
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