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audio/flacdec: don't run pcmconv on s16r44100c2

--- a/sys/src/cmd/audio/flacdec/flacdec.c

+++ b/sys/src/cmd/audio/flacdec/flacdec.c

@@ -7,13 +7,14 @@

 #include <lib9.h>

 #include "FLAC/stream_decoder.h"

-static int ifd = -1;

+static int ifd = 1;

+static int pid = -1;

 static int sts;

 static void

 flushout(void)

 {

-	if(ifd >= 0){

+	if(pid >= 0){

 		close(ifd);

 		wait(&sts);

 	}

@@ -73,7 +74,7 @@

 static FLAC__StreamDecoderWriteStatus

 decoutput(FLAC__StreamDecoder *dec, FLAC__Frame *frame, FLAC__int32 *buffer[], void *client_data)

 {

-	static int rate, chans, bits;

+	static int rate = 44100, chans = 2, bits = 16;

 	static unsigned char *buf;

 	static int nbuf;

 	FLAC__int32 *s, v;

@@ -84,7 +85,7 @@

 	if(rate != frame->header.sample_rate

 	|| chans != frame->header.channels

 	|| bits != frame->header.bits_per_sample){

-		int pid, pfd[2];

+		int pfd[2];

 		char fmt[32];

 		rate = frame->header.sample_rate;