Attached is a patch which fixes all these problems.

Cheers,
Erik

PS : I am the upstream author and this is the patch I applied to my
     development version.
-- 
----------------------------------------------------------------------
Erik de Castro Lopo
http://www.mega-nerd.com/
=== modified file 'src/alaw.c'
--- src/alaw.c	2009-02-07 04:20:17 +0000
+++ src/alaw.c	2009-05-28 10:25:46 +0000
@@ -69,7 +69,7 @@
 	else
 		psf->datalength = 0 ;
 
-	psf->sf.frames = psf->datalength / psf->blockwidth ;
+	psf->sf.frames = psf->blockwidth > 0 ? psf->datalength / psf->blockwidth : 0 ;
 
 	return 0 ;
 } /* alaw_init */

=== modified file 'src/float32.c'
--- src/float32.c	2009-03-25 07:22:03 +0000
+++ src/float32.c	2009-05-28 10:25:46 +0000
@@ -241,7 +241,7 @@
 	else
 		psf->datalength = 0 ;
 
-	psf->sf.frames = psf->datalength / psf->blockwidth ;
+	psf->sf.frames = psf->blockwidth > 0 ? psf->datalength / psf->blockwidth : 0 ;
 
 	return 0 ;
 } /* float32_init */

=== modified file 'src/htk.c'
--- src/htk.c	2009-02-07 04:20:17 +0000
+++ src/htk.c	2009-05-28 10:25:46 +0000
@@ -195,10 +195,17 @@
 		return SFE_HTK_NOT_WAVEFORM ;
 
 	psf->sf.channels = 1 ;
-	psf->sf.samplerate = 10000000 / sample_period ;
 
-	psf_log_printf (psf, "HTK Waveform file\n  Sample Count  : %d\n  Sample Period : %d => %d Hz\n",
-				sample_count, sample_period, psf->sf.samplerate) ;
+	if (sample_period > 0)
+	{	psf->sf.samplerate = 10000000 / sample_period ;
+		psf_log_printf (psf, "HTK Waveform file\n  Sample Count  : %d\n  Sample Period : %d => %d Hz\n",
+					sample_count, sample_period, psf->sf.samplerate) ;
+		}
+	else
+	{	psf->sf.samplerate = 16000 ;
+		psf_log_printf (psf, "HTK Waveform file\n  Sample Count  : %d\n  Sample Period : %d (should be > 0) => Guessed sample rate %d Hz\n",
+					sample_count, sample_period, psf->sf.samplerate) ;
+		} ;
 
 	psf->sf.format = SF_FORMAT_HTK | SF_FORMAT_PCM_16 ;
 	psf->bytewidth = 2 ;

=== modified file 'src/pcm.c'
--- src/pcm.c	2009-02-07 04:20:17 +0000
+++ src/pcm.c	2009-05-28 10:25:46 +0000
@@ -271,7 +271,7 @@
 	else
 		psf->datalength = 0 ;
 
-	psf->sf.frames = psf->datalength / psf->blockwidth ;
+	psf->sf.frames = psf->blockwidth > 0 ? psf->datalength / psf->blockwidth : 0 ;
 
 	return 0 ;
 } /* pcm_init */

=== modified file 'src/sds.c'
--- src/sds.c	2009-02-07 04:20:17 +0000
+++ src/sds.c	2009-05-28 10:25:46 +0000
@@ -219,21 +219,40 @@
 	if (marker != 0xF07E || byte != 0x01)
 		return SFE_SDS_NOT_SDS ;
 
-	psf_log_printf (psf, "Midi Sample Dump Standard (.sds)\nF07E\n Midi Channel  : %d\n", channel) ;
-
-	bytesread += psf_binheader_readf (psf, "e213", &sample_no, &bitwidth, &samp_period) ;
-
+	bytesread += psf_binheader_readf (psf, "e2", &sample_no) ;
 	sample_no = SDS_3BYTE_TO_INT_DECODE (sample_no) ;
+
+	psf_log_printf (psf, "Midi Sample Dump Standard (.sds)\nF07E\n"
+						" Midi Channel  : %d\n Sample Number : %d\n",
+						channel, sample_no) ;
+
+	bytesread += psf_binheader_readf (psf, "e13", &bitwidth, &samp_period) ;
+
 	samp_period = SDS_3BYTE_TO_INT_DECODE (samp_period) ;
 
 	psds->bitwidth = bitwidth ;
 
-	psf->sf.samplerate = 1000000000 / samp_period ;
-
-	psf_log_printf (psf, 	" Sample Number : %d\n"
-							" Bit Width     : %d\n"
+	if (psds->bitwidth > 1)
+		psf_log_printf (psf, " Bit Width     : %d\n", psds->bitwidth) ;
+	else
+	{	psf_log_printf (psf, " Bit Width     : %d (should be > 1)\n", psds->bitwidth) ;
+		return SFE_SDS_BAD_BIT_WIDTH ;
+		} ;
+
+	if (samp_period > 0)
+	{	psf->sf.samplerate = 1000000000 / samp_period ;
+
+		psf_log_printf (psf, " Sample Period : %d\n"
 							" Sample Rate   : %d\n",
-			sample_no, psds->bitwidth, psf->sf.samplerate) ;
+							samp_period, psf->sf.samplerate) ;
+		}
+	else
+	{	psf->sf.samplerate = 16000 ;
+
+		psf_log_printf (psf, " Sample Period : %d (should be > 0)\n"
+							" Sample Rate   : %d (guessed)\n",
+							samp_period, psf->sf.samplerate) ;
+		} ;
 
 	bytesread += psf_binheader_readf (psf, "e3331", &data_length, &sustain_loop_start, &sustain_loop_end, &loop_type) ;
 

=== modified file 'src/ulaw.c'
--- src/ulaw.c	2009-02-07 04:20:17 +0000
+++ src/ulaw.c	2009-05-28 10:25:46 +0000
@@ -59,7 +59,7 @@
 	else
 		psf->datalength = 0 ;
 
-	psf->sf.frames = psf->datalength / psf->blockwidth ;
+	psf->sf.frames = psf->blockwidth > 0 ? psf->datalength / psf->blockwidth : 0 ;
 
 	return 0 ;
 } /* ulaw_init */

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