Stuart Kent
wave player with audio effects
Fork of
wave_player
by 
Steve Ravet
Diff: wave_player.cpp
- Revision:
- 2:32da40a33717
- Parent:
- 0:62c18ade9a60
--- a/wave_player.cpp Tue Jan 18 03:57:27 2011 +0000
+++ b/wave_player.cpp Tue Nov 18 22:26:27 2014 +0000
@@ -12,8 +12,14 @@
#include <mbed.h>
+#include <math.h>
#include <stdio.h>
#include <wave_player.h>
+#include <shared.h>
+
+Wiistate wiistate = Nothing;
+float vol = 0; //VOLUME FLOAT
+Mutex key;
//-----------------------------------------------------------------------------
@@ -37,6 +43,49 @@
verbosity=v;
}
+int do_vol = 0;
+int do_flange = 1;
+int do_bit_crush = 0;
+int do_delay = 1;
+
+void update_state() {
+ Wiistate cur_state;
+ key.lock();
+ cur_state = wiistate;
+ key.unlock();
+
+ if(cur_state == Left) {
+ do_vol = 1;
+ do_flange = 1;
+ do_bit_crush = 0;
+ do_delay = 0;
+ } else if(cur_state == Right) {
+ do_vol = 1;
+ do_flange = 0;
+ do_bit_crush = 1;
+ do_delay = 0;
+ } else if(cur_state == Up) {
+ do_vol = 1;
+ do_flange = 0;
+ do_bit_crush = 0;
+ do_delay = 1;
+ } else if(cur_state == Down) {
+ do_vol = 1;
+ do_flange = 1;
+ do_bit_crush = 0;
+ do_delay = 1;
+ } else if(cur_state == Nothing) {
+ do_vol = 0;
+ do_flange = 0;
+ do_bit_crush = 0;
+ do_delay = 0;
+ //printf("%d %d %d %d\r\n", do_vol, do_flange, do_bit_crush, do_delay);
+ //printf("%d %d %d %d %d %d\r\n", cur_state==Nothing, Left, Right,Up,Down, Nothing);
+ }
+
+ //printf("%d %d %d %d\r\n", do_vol, do_flange, do_bit_crush, do_delay);
+}
+
//-----------------------------------------------------------------------------
// player function. Takes a pointer to an opened wave file. The file needs
// to be stored in a filesystem with enough bandwidth to feed the wave data.
@@ -67,29 +116,52 @@
fread(&chunk_id,4,1,wavefile);
fread(&chunk_size,4,1,wavefile);
+
+
+////
+#define SAMPLE_RATE 11025
+#define D_SIZE 8000
+#define M_PI 3.14159265358979323846
+short unsigned delayed[D_SIZE];
+unsigned int d_rptr = 0;
+unsigned int d_wptr = D_SIZE-1000;//((float)D_SIZE)/2.0;
+unsigned int d_wptr_2 = D_SIZE-3000;
+int flange = 0; // CHANG
+int flange_amplitude = D_SIZE/4; // /2
+//int flange_freq = SAMPLE_RATE; // 2*pi*cur_samp_cnt/11025
+float cur_samp_cnt = 0;
+int flange_r_ptr = 0;
+int flange_dir = 1;
+int flip_sec = 0;
+
+////
+for(int di = 0; di < D_SIZE; di++) {
+ delayed[di] = 0;
+}
+
while (!feof(wavefile)) {
if (verbosity)
- printf("Read chunk ID 0x%x, size 0x%x\n",chunk_id,chunk_size);
+ printf("Read chunk ID 0x%x, size 0x%x\r\n",chunk_id,chunk_size);
switch (chunk_id) {
case 0x46464952:
fread(&data,4,1,wavefile);
if (verbosity) {
- printf("RIFF chunk\n");
- printf(" chunk size %d (0x%x)\n",chunk_size,chunk_size);
- printf(" RIFF type 0x%x\n",data);
+ printf("RIFF chunk\r\n");
+ printf(" chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+ printf(" RIFF type 0x%x\r\n",data);
}
break;
case 0x20746d66:
fread(&wav_format,sizeof(wav_format),1,wavefile);
if (verbosity) {
- printf("FORMAT chunk\n");
- printf(" chunk size %d (0x%x)\n",chunk_size,chunk_size);
- printf(" compression code %d\n",wav_format.comp_code);
- printf(" %d channels\n",wav_format.num_channels);
- printf(" %d samples/sec\n",wav_format.sample_rate);
- printf(" %d bytes/sec\n",wav_format.avg_Bps);
- printf(" block align %d\n",wav_format.block_align);
- printf(" %d bits per sample\n",wav_format.sig_bps);
+ printf("FORMAT chunk\r\n");
+ printf(" chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+ printf(" compression code %d\r\n",wav_format.comp_code);
+ printf(" %d channels\r\n",wav_format.num_channels);
+ printf(" %d samples/sec\r\n",wav_format.sample_rate);
+ printf(" %d bytes/sec\r\n",wav_format.avg_Bps);
+ printf(" block align %d\r\n",wav_format.block_align);
+ printf(" %d bits per sample\r\n",wav_format.sig_bps);
}
if (chunk_size > sizeof(wav_format))
fseek(wavefile,chunk_size-sizeof(wav_format),SEEK_CUR);
@@ -104,11 +176,11 @@
num_slices=chunk_size/wav_format.block_align;
samp_int=1000000/(wav_format.sample_rate);
if (verbosity) {
- printf("DATA chunk\n");
- printf(" chunk size %d (0x%x)\n",chunk_size,chunk_size);
- printf(" %d slices\n",num_slices);
- printf(" Ideal sample interval=%d\n",(unsigned)(1000000.0/wav_format.sample_rate));
- printf(" programmed interrupt tick interval=%d\n",samp_int);
+ printf("DATA chunk\r\n");
+ printf(" chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+ printf(" %d slices\r\n",num_slices);
+ printf(" Ideal sample interval=%d\r\n",(unsigned)(1000000.0/wav_format.sample_rate));
+ printf(" programmed interrupt tick interval=%d\r\n",samp_int);
}
// starting up ticker to write samples out -- no printfs until tick.detach is called
@@ -128,10 +200,12 @@
// note that from what I can find that 8 bit wave files use unsigned data,
// while 16 and 32 bit wave files use signed data
//
+
+
for (slice=0;slice<num_slices;slice+=1) {
fread(slice_buf,wav_format.block_align,1,wavefile);
if (feof(wavefile)) {
- printf("Oops -- not enough slices in the wave file\n");
+ printf("Oops -- not enough slices in the wave file\r\n");
exit(1);
}
data_sptr=(short *)slice_buf; // 16 bit samples
@@ -172,8 +246,98 @@
}
dac_data=(short unsigned)slice_value;
if (verbosity)
- printf("sample %d wptr %d slice_value %d dac_data %u\n",slice,DAC_wptr,(int)slice_value,dac_data);
- DAC_fifo[DAC_wptr]=dac_data;
+ printf("sample %d wptr %d slice_value %d dac_data %u\r\n",slice,DAC_wptr,(int)slice_value,dac_data);
+
+
+
+ update_state();
+
+
+ ////
+ delayed[d_rptr] = dac_data;
+
+ d_rptr = (d_rptr == (D_SIZE-1)) ? 0 : (d_rptr + 1);
+ d_wptr = (d_wptr == (D_SIZE-1)) ? 0 : (d_wptr + 1);
+ d_wptr_2 = (d_wptr_2 == (D_SIZE-1)) ? 0 : (d_wptr_2 + 1);
+
+ float f_dac_data = (float)dac_data;
+ float f_delay_data;
+ float f_delay_data_2;
+ int flange_dist = 0;
+ int flange_dist_check;
+ if(flange) {
+ flange_dist = flange_amplitude*sin(2*M_PI*cur_samp_cnt/(float)SAMPLE_RATE);
+ /*if(cur_samp_cnt != 0) {
+ while(cur_samp_cnt < 4000) {
+ flange_dist = flange_amplitude*sin(2*M_PI*cur_samp_cnt/(float)SAMPLE_RATE);
+ printf("%f %f\r\n", flange_dist, 2*M_PI*cur_samp_cnt/(float)SAMPLE_RATE);
+ cur_samp_cnt++;
+ }
+ return;
+ }*/
+ //printf("%d\r\n",flange_dist);
+ flange_dist_check = d_wptr + flange_dist - D_SIZE;
+ //d_wptr += flange_dist_check > 0 ? flange_dist_check : (d_wptr + flange_dist) < 0 ? (D_SIZE + d_wptr + flange_dist) : flange_dist;
+ //d_wptr += flange_dist_check < 0 ? flange_dist : ((d_wptr + flange_dist) < 0) ? 0 : flange_dist;
+ d_wptr = ((d_wptr + flange_dist) > 0) ? (d_wptr + flange_dist) % D_SIZE : (D_SIZE + flange_dist); //(D_SIZE + flange_dist) WRONG
+ }
+ //cur_samp_cnt = (cur_samp_cnt+1) > SAMPLE_RATE ? 0 : (cur_samp_cnt+1);
+ cur_samp_cnt = (cur_samp_cnt+1) > SAMPLE_RATE ? 0 : (cur_samp_cnt+1);
+
+ if(cur_samp_cnt == 0) {
+ flip_sec = !flip_sec;
+ }
+
+
+ #define N_SAMPLES_FLANGE_PERIOD 100//((SAMPLE_RATE) >> 2) // WHY IS MZ 100???
+
+ if(do_flange) {// && (flip_sec)) {
+ if(flange_r_ptr == N_SAMPLES_FLANGE_PERIOD) {
+ flange_dir = -1;
+ } else if(flange_r_ptr == -N_SAMPLES_FLANGE_PERIOD) {
+ flange_dir = 1;
+ }
+ flange_r_ptr += flange_dir;
+ } else {
+ flange_r_ptr = 0;
+ }
+
+ int total_ptr = (d_wptr + flange_r_ptr);
+ total_ptr = (total_ptr > D_SIZE) ? (total_ptr - D_SIZE) : total_ptr;
+ total_ptr = (total_ptr < 0) ? (D_SIZE - total_ptr) : total_ptr;
+
+ //f_delay_data = (float) delayed[d_wptr];
+ f_delay_data = (float) delayed[total_ptr];
+ f_delay_data_2 = (float) delayed[d_wptr_2];
+ float f_mix;
+
+
+ if(do_delay || do_flange) {
+ if(do_flange) {
+ f_mix = 0.01*f_dac_data + 0.7*f_delay_data;
+ } else {
+ f_mix = 0.333*f_dac_data + 0.333*f_delay_data + 0.333*f_delay_data_2;
+ }
+ //0.01*f_dac_data + 0.7*f_delay_data;
+ } else {
+ f_mix = f_dac_data;
+ }
+ ////
+
+ float time_in_period = (float)cur_samp_cnt/(float)SAMPLE_RATE;
+ //float vol = 0.5 + 0.5*sin(2*M_PI*time_in_period); // Full dynamic range
+ float my_vol = 0.75 + 0.25*sin(2*M_PI*time_in_period);
+
+ if(do_vol) f_mix = (my_vol*f_mix);
+
+ if(do_bit_crush) {
+ short unsigned beef = (short unsigned)f_mix;
+ //beef = (beef>>7) << 7;
+ //printf("beef %x\r\nbeeeef %x\r\n", beef, beef & 0xFFF0);
+ DAC_fifo[DAC_wptr]=beef &0xF800;
+ } else {
+ DAC_fifo[DAC_wptr]=(short unsigned)(f_mix);
+ }
DAC_wptr=(DAC_wptr+1) & 0xff;
while (DAC_wptr==DAC_rptr) {
}
@@ -184,11 +348,11 @@
break;
case 0x5453494c:
if (verbosity)
- printf("INFO chunk, size %d\n",chunk_size);
+ printf("INFO chunk, size %d\r\n",chunk_size);
fseek(wavefile,chunk_size,SEEK_CUR);
break;
default:
- printf("unknown chunk type 0x%x, size %d\n",chunk_id,chunk_size);
+ printf("unknown chunk type 0x%x, size %d\r\n",chunk_id,chunk_size);
data=fseek(wavefile,chunk_size,SEEK_CUR);
break;
}
@@ -202,7 +366,7 @@
{
if (DAC_on) {
#ifdef VERBOSE
- printf("ISR rdptr %d got %u\n",DAC_rptr,DAC_fifo[DAC_rptr]);
+ printf("ISR rdptr %d got %u\r\n",DAC_rptr,DAC_fifo[DAC_rptr]);
#endif
wave_DAC->write_u16(DAC_fifo[DAC_rptr]);
DAC_rptr=(DAC_rptr+1) & 0xff;