X-Git-Url: https://www.hackdaworld.org/gitweb/?p=sound-tools%2Fhdrec.git;a=blobdiff_plain;f=hdrec.c;h=bf36409d6733216d546c884c76a6cc6d0662026c;hp=77b222ba9d5644dff5c45a59a56200e17191c6a5;hb=HEAD;hpb=9d9d45455b64194f1d8a7a3ea89d3f926c751431

diff --git a/hdrec.c b/hdrec.c
index 77b222b..bf36409 100644
--- a/hdrec.c
+++ b/hdrec.c
@@ -5,6 +5,7 @@
  *
  */
 
+#define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -18,13 +19,20 @@
 #include <unistd.h>
 #include <errno.h>
 
+/* dfb */
+#include <directfb.h>
+
 #include "oss_api.h"
 #include "hdrec.h"
 
+/* fourier */
+#include "fourier.h"
+
 int usage(void) {
 	printf("usage:\n\n");
 	printf("-h \t\t print this help\n");
 	printf("-i \t\t use/print file info\n");
+	printf("-R \t\t play reversed :)\n");
 	printf("-d <device> \t sound device (eg: /dev/dsp)\n");
 	printf("-r <file> \t record to <file>\n");
 	printf("-p <file> \t play from <file>\n");
@@ -55,10 +63,23 @@ int main(int argc,char **argv) {
 	unsigned char info[8];
 	int info_int;
 	int tmp;
+	char is_wav=0;
 	fd_set read_fds,write_fds;
 	struct timeval fds_tv;
 	char c;
 
+	/* dfb */
+	IDirectFB *dfb;
+	IDirectFBSurface *primary;
+	DFBSurfaceDescription dsc;
+	int width,height;
+
+	/* fourier */
+	t_fourier fourier;
+	int sample;
+	int dx;
+	int a_f;
+
 	/* defaults */
 	strcpy(device,"");
 	set.format=AFMT_S16_LE;
@@ -83,6 +104,9 @@ int main(int argc,char **argv) {
 					mode|=PLAY;
 					strcpy(play_file,argv[++i]);
 					break;
+				case 'R':
+					mode|=REVERSED;
+					break;
 				case 's':
 					set.channel=STEREO;
 					break;
@@ -187,6 +211,7 @@ int main(int argc,char **argv) {
 		perror("malloc");
 		return -1;
 	}
+
 	if((mode&RECORD) && (mode&PLAY)) {
 		if((buf2=malloc(set.bufsize*sizeof(unsigned char)))==NULL) {
 			printf("allocating 2nd memory failed :(\n");
@@ -196,12 +221,76 @@ int main(int argc,char **argv) {
 	}
 
 	if((mode&PLAY) && (!(mode&RECORD))) {
+
+	/* dfb */
+	DirectFBInit(&argc,&argv);
+	DirectFBCreate(&dfb);
+	dfb->SetCooperativeLevel(dfb,DFSCL_FULLSCREEN);
+	dsc.flags=DSDESC_CAPS;
+	dsc.caps=DSCAPS_PRIMARY|DSCAPS_FLIPPING;
+	dfb->CreateSurface(dfb,&dsc,&primary);
+	primary->GetSize(primary,&width,&height);
+	dprintf(1,"graphical equalizer dims: %dx%d\n",width,height);
+	primary->SetColor(primary,0x80,0x80,0xff,0xff);
+	//primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC);
+
+	/* fourier */
+	fourier_init(&fourier,1);
+	fourier.type=FWD|DFT;
+	fourier.dim=1;
+	fourier.data_len[0]=set.bufsize/(set.format&AFMT_S16_LE?4:2);
+	fourier_alloc_data(&fourier);
+	printf("debug: allocated size for %d samples to do dft\n",fourier.data_len[0]);
+	dx=8*width/fourier.data_len[0];
+	printf("debug: dx = %d ???\n",dx);
+
 		printf("playing file %s ...\n",play_file);
+		if(mode&REVERSED) printf("but we do it reversed!\n");
 		rw=1;
-		while(rw) {
-			rw=read(pfile_fd,buf,set.bufsize);
-			write(audio_fd,buf,set.bufsize);
+		if(!(mode&REVERSED)) {
+			while(rw) {
+				/* read samples */
+				rw=read(pfile_fd,buf,set.bufsize);
+				/* do fourier trafo */
+				for(sample=0;sample<fourier.data_len[0];sample++) fourier.data[sample].r=*((signed short *)buf+(set.format&AFMT_S16_LE?2:1)*sample);
+				fourier_dft_1d(&fourier);
+				/* print graph */
+				primary->Clear(primary,0,0,0,0xff);
+				a_f=dx*fourier.data_len[0]*440/set.freq;
+				primary->DrawLine(primary,a_f,height,a_f,0);
+				for(sample=0;sample<fourier.data_len[0]/8;sample++) primary->FillRectangle(primary,sample*dx,0,dx,height*sqrt(fourier.ftdata[sample].r*fourier.ftdata[sample].r+fourier.ftdata[sample].i*fourier.ftdata[sample].i)/0x7fff);
+				primary->Flip(primary,NULL,DSFLIP_WAITFORSYNC);
+				//fcount=0;
+
+				//}
+
+				write(audio_fd,buf,set.bufsize);
+			}
+		} else {
+			i=0;
+			read(pfile_fd,info,4);
+			if(!strncmp(info,"RIFF",4)) {
+				is_wav=1;
+				printf("\nassuming wav file according to header ...\n");
+				i=44;
+			}
+			lseek(pfile_fd,0,SEEK_SET);
+			tmp=lseek(pfile_fd,0,SEEK_END);
+			// if(set.format==AFMT_U8) i=set.channel;
+			// if(set.format==AFMT_S16_LE) i=set.channel*2;
+			for(j=0;j<(tmp-i);j++) {
+				for(k=0;k<set.bufsize;k++) {
+					lseek(pfile_fd,tmp-(j+1)*set.bufsize+k,SEEK_SET);
+					read(pfile_fd,buf+k,1);
+				}
+				write(audio_fd,buf,set.bufsize);
+			}
 		}
+
+		/* dfb release */
+		primary->Release(primary);
+		dfb->Release(dfb);
+
 	}
 
 	if((mode&RECORD) && (!(mode&PLAY))) {
@@ -223,30 +312,26 @@ int main(int argc,char **argv) {
 		/* write_fds */
 		FD_SET(sfile_fd,&write_fds);
 		FD_SET(audio_fd,&write_fds);
-		fds_tv.tv_sec=0;
-		fds_tv.tv_usec=1000;
 		while(c!='q') {
+			fds_tv.tv_sec=0;
+			fds_tv.tv_usec=1000;
 			k=select(sfile_fd+1,&read_fds,&write_fds,NULL,&fds_tv);
 			if(k==0) printf("itz zZzero :p\n");
 			if(k) {
+				printf("returned after %ld usecs\n",1000-fds_tv.tv_usec);
 				if(FD_ISSET(0,&read_fds)) {
-					puts("reading from stdin");
 					read(0,&c,1);
 				}
 				if(FD_ISSET(pfile_fd,&read_fds)) {
-					puts("read from sound file");
 					read(pfile_fd,buf2,set.bufsize);
 				}
 				if(FD_ISSET(audio_fd,&read_fds)) {
-					puts("reading from audio device");
 					read(audio_fd,buf,set.bufsize);
 				}
 				if(FD_ISSET(sfile_fd,&write_fds)) {
-					puts("writing to file");
 					write(sfile_fd,buf,set.bufsize);
 				}
 				if(FD_ISSET(audio_fd,&write_fds)) {
-					puts("writing to audio device");
 					write(audio_fd,buf2,set.bufsize);
 				}
 			}