static void*
files_open(char *filesname, char *audioname,
struct ng_video_fmt *video, const void *priv_video, int fps,
struct ng_audio_fmt *audio, const void *priv_audio)
{
struct files_handle *h;
if (video->fmtid != VIDEO_NONE && NULL == filesname)
return NULL;
if (NULL == (h = malloc(sizeof(*h))))
return NULL;
/* init */
memset(h,0,sizeof(*h));
h->video = *video;
h->audio = *audio;
if (filesname)
strcpy(h->file,filesname);
if (h->audio.fmtid != AUDIO_NONE) {
h->wav_fd = open(audioname, O_CREAT | O_RDWR | O_TRUNC, 0666);
if (-1 == h->wav_fd) {
fprintf(stderr,"open %s: %s\n",audioname,strerror(errno));
free(h);
return NULL;
}
wav_start_write(h->wav_fd,&h->wav_header,&h->audio);
}
return h;
}
static void*
raw_open(char *videoname, char *audioname,
struct ng_video_fmt *video, const void *priv_video, int fps,
struct ng_audio_fmt *audio, const void *priv_audio)
{
struct raw_handle *h;
int frame_rate_code = 0;
int frame_rate_mul = fps;
int frame_rate_div = 1000;
if (NULL == (h = malloc(sizeof(*h))))
return NULL;
/* init */
memset(h,0,sizeof(*h));
h->video = *video;
h->audio = *audio;
h->vpriv = priv_video;
/* audio */
if (h->audio.fmtid != AUDIO_NONE) {
h->wav_fd = open(audioname, O_CREAT | O_RDWR | O_TRUNC, 0666);
if (-1 == h->wav_fd) {
fprintf(stderr,"open %s: %s\n",audioname,strerror(errno));
free(h);
return NULL;
}
wav_start_write(h->wav_fd,&h->wav_header,&h->audio);
}
/* video */
if (h->video.fmtid != VIDEO_NONE) {
if (h->vpriv && h->vpriv->yuv4mpeg) {
switch (fps) {
case 23976: frame_rate_code = 1; /* 24000 / 1001 */
frame_rate_mul = 24000;
frame_rate_div = 1001;
break;
case 29970: frame_rate_code = 4; /* 30000 / 1001 */
frame_rate_mul = 30000;
frame_rate_div = 1001;
break;
case 59940: frame_rate_code = 7; /* 60000 / 1001 */
frame_rate_mul = 60000;
frame_rate_div = 1001;
break;
case 24000: frame_rate_code = 2; break;
case 25000: frame_rate_code = 3; break;
case 30000: frame_rate_code = 5; break;
case 50000: frame_rate_code = 6; break;
case 60000: frame_rate_code = 8; break;
default:
fprintf(stderr,"illegal frame rate\n");
free(h);
return NULL;
}
}
if (NULL != videoname) {
h->fd = open(videoname, O_CREAT | O_RDWR | O_TRUNC, 0666);
if (-1 == h->fd) {
fprintf(stderr,"open %s: %s\n",videoname,strerror(errno));
if (h->wav_fd)
close(h->wav_fd);
free(h);
return NULL;
}
} else {
h->fd = 1; /* use stdout */
}
if (h->vpriv && h->vpriv->yuv4mpeg) {
char header[64];
switch (h->vpriv->yuv4mpeg) {
case 1:
sprintf(header, "YUV4MPEG %d %d %d\n",
h->video.width, h->video.height,frame_rate_code);
break;
case 2:
sprintf(header, "YUV4MPEG2 W%d H%d F%d:%d\n",
h->video.width, h->video.height,
frame_rate_mul, frame_rate_div);
break;
}
write(h->fd, header, strlen(header));
}
}
return h;
}
int main()
{
long loops;
int rc;
int size;
snd_pcm_t *rec_handle;
snd_pcm_hw_params_t *rec_params;
unsigned int val;
int dir;
snd_pcm_uframes_t frames;
char *buffer;
WAVEHDR wavheader;
int total_len = 0;
FILE *fp_rec = fopen("rec.wav", "wb");
if(fp_rec==NULL)
{
return 0;
}
wav_start_write(fp_rec, &wavheader);
/* Open PCM device for recording (capture). */
rc = snd_pcm_open(&rec_handle, "default",
SND_PCM_STREAM_CAPTURE, 0);
if (rc < 0) {
fprintf(stderr,
"unable to open pcm device: %s\n",
snd_strerror(rc));
exit(1);
}
/* Allocate a hardware parameters object. */
snd_pcm_hw_params_alloca(&rec_params);
/* Fill it in with default values. */
snd_pcm_hw_params_any(rec_handle, rec_params);
/* Set the desired hardware parameters. */
/* Interleaved mode */
snd_pcm_hw_params_set_access(rec_handle, rec_params,
SND_PCM_ACCESS_RW_INTERLEAVED);
/* Signed 16-bit little-endian format */
snd_pcm_hw_params_set_format(rec_handle, rec_params,
SND_PCM_FORMAT_S16_LE);
/* Two channels (stereo) */
snd_pcm_hw_params_set_channels(rec_handle, rec_params, 1);
/* 44100 bits/second sampling rate (CD quality) */
val = 8000;
snd_pcm_hw_params_set_rate_near(rec_handle, rec_params,
&val, &dir);
/* Set period size to 32 frames. */
frames = 32;
snd_pcm_hw_params_set_period_size_near(rec_handle,
rec_params, &frames, &dir);
/* Write the parameters to the driver */
rc = snd_pcm_hw_params(rec_handle, rec_params);
if (rc < 0)
{
fprintf(stderr,
"unable to set hw parameters: %s\n",
snd_strerror(rc));
exit(1);
}
/* Use a buffer large enough to hold one period */
snd_pcm_hw_params_get_period_size(rec_params, &frames, &dir);
size = frames * 2; /* 2 bytes/sample, 2 channels */
buffer = (char *) malloc(size);
/* We want to loop for 5 seconds */
snd_pcm_hw_params_get_period_time(rec_params, &val, &dir);
loops = 2000;
while (loops-- > 0)
{
rc = snd_pcm_readi(rec_handle, buffer, frames);
if (rc == -EPIPE)
{
/* EPIPE means overrun */
fprintf(stderr, "overrun occurred\n");
snd_pcm_prepare(rec_handle);
}
else if (rc < 0)
{
fprintf(stderr, "error from read: %s\n", snd_strerror(rc));
}
else if (rc != (int)frames)
{
fprintf(stderr, "short read, read %d frames\n", rc);
}
rc = fwrite(buffer, 1, size, fp_rec);
total_len += size;
printf("#\n");
if (rc != size)
fprintf(stderr,"short write: wrote %d bytes\n", rc);
}
wav_stop_write(fp_rec, &wavheader, total_len);
snd_pcm_drain(rec_handle);
snd_pcm_close(rec_handle);
free(buffer);
fclose(fp_rec);
return 0;
}
