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fullsystd3.c
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#include <stdio.h>
#include <stdlib.h>
#include <alsa/asoundlib.h>
#include <sndfile.h>
#include <time.h>
#include <samplerate.h>
#include <pthread.h>
#define PCM_DEVICE "default"
#define converter 1
#define MAX_PLAY_RATE 5
#define NUMFILES 5
// GLOBAL STRUCT
typedef struct InputData {
float speed; // slide bar potentiometers, slave 1
int gain; // slide bar potentiometers, slave 1
//uint8 high_eq; // knobs, slave 1
//uint8 mid_eq; // knobs, slave 1
//uint8 low_eq; // knobs, slave 1
//uint8 fx1; // knobs, slave 1
//uint8 fx2; // knobs, slave 1
//uint8 fx3; // knobs, slave 1
//uint8 encoder; // turntable encoder count, slave 1
//uint8 next; // buttons, slave 2
//uint8 prev; // buttons, slave 2
int play_pause; // buttons, slave 2
//uint8 fx_onoff; // buttons, slave 2
} InputData;
InputData data = {1,5,1};
int flag = 0;
void * thread_sampling(void * unused);
//void fileloadmem(float **filebase, float **filepos, float **eofin, SNDFILE **input, SF_INFO *sfinf);
//void fileopen(SNDFILE **input, SF_INFO *sfinf, char *filename);
main(int argc, char **argv){
float *filein = NULL;
float *buffin = NULL;
float *eofin;
float *buffout;
short *final;
char *file1 = "musik.wav";
char *file2 = "got.wav";
int pcm, pcmrc;
int tmp;
int i = 0;
int *blah;
// create the SPI thread
pthread_t * spithread = malloc(sizeof(pthread_t));
SNDFILE *inputf;
SF_INFO sfinf;
SRC_DATA datastr;
SRC_STATE *statestr;
int error;
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
snd_pcm_uframes_t frames;
// fileopen(&inputf, &sfinf, file1);
inputf = sf_open(file2, SFM_READ, &sfinf);
if (inputf == NULL) printf("COULD NOT OPEN FILE SORRY \n\n");
if ((filein = malloc(sizeof(float)*sfinf.channels*sfinf.frames)) == NULL)
{
printf("MAN YOU OUT OF MEM");
return 0;
}
//load file into memory
// fileloadmem(&filein, &buffin, &eofin, &inputf, &sfinf);
sf_readf_float(inputf, filein , sfinf.frames);
buffin = filein;
eofin = filein + sfinf.frames * sfinf.channels ;
if (pcm =snd_pcm_open(&handle, PCM_DEVICE, SND_PCM_STREAM_PLAYBACK, 0)< 0){
printf("Error: CANNOT OPEN PCM DEVICE\n");
}
//allocate default parameters
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_hw_params_any(handle, params);
//set parameters
if (pcm = snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED)< 0){
printf("Cannot set interleaved mode\n");
}
if (pcm = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE)< 0){
printf("CANNOT SET FORMAT\n");
}
if (pcm = snd_pcm_hw_params_set_channels(handle, params, sfinf.channels)< 0){
printf("CANNOT SET CHANNELS \n");
}
if (pcm = snd_pcm_hw_params_set_rate(handle, params, sfinf.samplerate, 0)< 0){
printf("CANNOT SET SAMPLERATES \n");
}
//write parameters
if (pcm = snd_pcm_hw_params(handle, params)< 0){
printf("CANNOT SET HARDWARE PARAMETERS\n");
}
printf("PCm NAME: %s\n", snd_pcm_name(handle));
printf("PCM state: %s \n", snd_pcm_state_name(snd_pcm_state(handle)));
snd_pcm_hw_params_get_channels(params, &tmp);
printf("channels: %i\n", tmp);
snd_pcm_hw_params_get_rate(params, &tmp, 0);
printf("rate: %d \n", tmp);
snd_pcm_hw_params_get_period_size(params, &frames, 0);
fprintf(stderr, "# frames in a period: %d\n", frames);
buffout = malloc(frames*sfinf.channels * sizeof(float));//frames
final = malloc(frames*sfinf.channels * sizeof(short));
statestr = src_new (converter, sfinf.channels, &error);
//datastr->end_of_input = 0;
datastr.end_of_input = 0;
datastr.data_out = buffout;
datastr.output_frames = frames;//frames
while (i != 50){
memset(final, 0, frames*sfinf.channels);
pcmrc = snd_pcm_writei(handle, final, frames);//frames
if (pcmrc == -EPIPE){//this is where the error happens on the DAc for like 25 - 500 ms it underruns but recovers, so i dont know
printf("UNDERRUN!\n");
snd_pcm_prepare(handle);
}
else if(pcmrc < 0){
printf("ERROR WRITING!!!\n");
}
// else if (pcmrc != datastr.output_frames_gen){
// printf("WRITE != READ\n");
// }
i++;
}
pthread_create(spithread, NULL, thread_sampling, NULL);
while(buffin != eofin){
datastr.data_in = buffin;
// datastr.src_ratio = src_ratio;
// if (datastr.input_frames == 0 ){datastr.input_frames = frames*MAX_PLAY_RATE;}//frames
datastr.input_frames = frames*MAX_PLAY_RATE;
if (data.play_pause == 1){
// datastr.src_ratio = datamain.src_r;
// printf("SRC RATIO: %f\n\n", data.src_r);
if (src_set_ratio(statestr, data.speed) != 0){
printf("Could not reset ratio\n");
}
if ((eofin - buffin) < frames*MAX_PLAY_RATE) {
//datastr.end_of_input = SF_TRUE; // if you read less than a full frame it says i am done
memset(buffout, 0.0, frames*sfinf.channels*sizeof(float));//frames
if( (eofin - buffin) < frames) {
datastr.end_of_input = SF_TRUE;
break;
}
}
datastr.src_ratio = data.speed;
if ((error = src_process(statestr, &datastr)))
{
printf("\n\nERRORR converting: %s\n\n", src_strerror(error));
exit(1);
}
buffin = buffin + datastr.input_frames_used*sfinf.channels;
//datastr.input_frames -= datastr.input_frames_used;
//printf("number of frames generated %d \n", datastr.output_frames_gen);
src_float_to_short_array(buffout, final, frames*sfinf.channels);//frames
usleep(3000); //even with all the processing we can still sleep for like 3000;
pcmrc = snd_pcm_writei(handle, final, frames);//frames
if (pcmrc == -EPIPE){//this is where the error happens on the DAc for like 25 - 500 ms it underruns but recovers, so i dont know
printf("UNDERRUN!\n");
snd_pcm_prepare(handle);
}
else if(pcmrc < 0){
printf("ERROR WRITING!!!\n");
}
else if (pcmrc != datastr.output_frames_gen){
printf("WRITE != READ\n");
}
}
if (data.play_pause == 0){
continue;
}
}
free(filein);
free(buffout);
free(final);
free(spithread);
// free(data);
return 0;
}
// entry function for the sampling thread
void * thread_sampling(void * unused)
{
// DECLARATIONS
char c = ' ';
while (1) {
c = getc(stdin);
getc(stdin);
// CONDITIONAL ADJUSTMENTS
if (c == 'p'){
data.play_pause = !(data.play_pause);
flag = 1;
} else if (c == 'f'){
data.speed = data.speed - .1;
flag = 1;
} else if (c == 's'){
data.speed = data.speed + .1;
flag = 1;
} else if (c == 'u'){
data.gain++;
flag = 1;
} else if (c == 'd'){
data.gain--;
flag = 1;
}
/*
printf("data.speed = %.1f\n",data.speed);
printf("data.gain = %d\n",data.gain);
printf("data.play_pause = %d\n",data.play_pause);
*/
}
return NULL;
}
/*void fileopen(SNDFILE **input, SF_INFO *sfinf, char *filename){
input = sf_open(filename, SFM_READ, &sfinf);
if (input == NULL) printf("COULD NOT OPEN FILE SORRY \n\n");
return;
}*/
/*void fileloadmem(float **filebase, float **filepos, float **eofin, SNDFILE **input, SF_INFO *sfinf){
sf_readf_float(input, filebase , sfinf.frames);
filepos = filebase;
eofin = filebase + sfinf.frames * sfinf.channels ;
return;
}*/