static ssize_t pcm_write(u_char *data, size_t count)
{
ssize_t r;
ssize_t result = 0;
if (count < chunk_size) {
snd_pcm_format_set_silence(hwparams.format, data + count * bits_per_frame / 8, (chunk_size - count) * hwparams.channels);
count = chunk_size;
}
while (count > 0) {
r = writei_func(handle, data, count);
if (r == -EAGAIN || (r >= 0 && (size_t)r < count)) {
snd_pcm_wait(handle, 1000);
} else if (r == -EPIPE) {
xrun();
} else if (r == -ESTRPIPE) {
suspend();
} else if (r < 0) {
error("write error: %s", snd_strerror(r));
exit(EXIT_FAILURE);
}
if (r > 0) {
if (vumeter)
compute_max_peak(data, r * hwparams.channels);
result += r;
count -= r;
data += r * bits_per_frame / 8;
}
}
return result;
}
static void playback(char *name)
{
printf("name : %s\n",name);
int fd;
fd = open(name, O_RDONLY, 0);
/* read the file header */
WaveTotalInfo *waveTotalInfo=(WaveTotalInfo *)malloc(WAVE_HEAD_LENGTH);
int a;
a=read(fd, waveTotalInfo, WAVE_HEAD_LENGTH);
printf("1. a= %d WAVE_HEAD_LENGTH: %d\n",a,WAVE_HEAD_LENGTH);
/* read data*/
int rawDataSize=waveTotalInfo->waveDataStart.dataSize;
uint8_t *rawData=(uint8_t *)malloc(rawDataSize);
a=read(fd, rawData, rawDataSize);
printf("2. a= %d rawDataSize: %d\n",a,rawDataSize);
sleep(1);
int i;
#if 0
printf("0000020 : ");
for(i=0;i<rawDataSize;i++)
{
if(rawData[i]==0)
{
printf("0x00 ");
}
else
{
printf("%#02x ",rawData[i]);
}
if((i%16)==15)
{
printf("\n");
printf("%06x0 : ",i/16+3);
}
}
#endif
#define CUT_PART 10
#define DATA_UNIT_NUMBER (16/8)*2 /*(16bit/8bit) * 2 channel*/
set_params();
for(i=0;i<CUT_PART;i++)
{
printf("%d\n",(rawDataSize/CUT_PART)*i);
writei_func(handle, &rawData[(rawDataSize/CUT_PART)*i],rawDataSize/(CUT_PART*DATA_UNIT_NUMBER));
}
}
static size_t pcm_write_raw(alsa_param_t * alsa_param, u_char * data, size_t count)
{
snd_pcm_sframes_t r;
size_t result = 0;
/*
if (count < chunk_size) {
snd_pcm_format_set_silence(hwparams.format, data + count * bits_per_frame / 8, (chunk_size - count) * hwparams.channels);
count = chunk_size;
}
*/
while (count > 0) {
r = writei_func(alsa_param->handle, data, count);
if (r == -EINTR) {
r = 0;
}
if (r == -ESTRPIPE) {
while ((r = snd_pcm_resume(alsa_param->handle)) == -EAGAIN) {
sleep(1);
}
}
if (r < 0) {
//printf("xun in\n");
if ((r = snd_pcm_prepare(alsa_param->handle)) < 0) {
return 0;
}
}
if (r > 0) {
result += r;
count -= r;
data += r * alsa_param->bits_per_frame / 8;
}
}
return result;
}