From 81baae7ddc2b16031af2526455993c06a2f24d25 Mon Sep 17 00:00:00 2001
From: Max Horn <max@quendi.de>
Date: Mon, 28 Jul 2003 01:50:46 +0000
Subject: [PATCH] added CopyRateConverter (used if inrate == outrate)

svn-id: r9214
---
 sound/rate.cpp     |  4 ++--
 sound/rate.h       | 20 ++++++++++++++++++++
 sound/resample.cpp |  8 --------
 3 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/sound/rate.cpp b/sound/rate.cpp
index 5d6faaeee34..f62d20e5366 100644
--- a/sound/rate.cpp
+++ b/sound/rate.cpp
@@ -107,7 +107,7 @@ int st_rate_flow(eff_t effp, AudioInputStream &input, st_sample_t *obuf, st_size
 		ilast[i] = rate->ilast[i];
 
 	ostart = obuf;
-	oend = obuf + *osamp;
+	oend = obuf + *osamp * 2;
 
 	while (obuf < oend && !input.eof()) {
 
@@ -159,7 +159,7 @@ int st_rate_flow(eff_t effp, AudioInputStream &input, st_sample_t *obuf, st_size
 	}
 
 the_end:
-	*osamp = obuf - ostart;
+	*osamp = (obuf - ostart) / 2;
 	for (i = 0; i < channels; i++)
 		rate->ilast[i] = ilast[i];
 	return (ST_SUCCESS);
diff --git a/sound/rate.h b/sound/rate.h
index 080107c831d..809042a8b2b 100644
--- a/sound/rate.h
+++ b/sound/rate.h
@@ -81,4 +81,24 @@ public:
 	virtual int drain(st_sample_t *obuf, st_size_t *osamp, st_volume_t vol);
 };
 
+class CopyRateConverter : public RateConverter {
+public:
+	virtual int flow(AudioInputStream &input, st_sample_t *obuf, st_size_t *osamp, st_volume_t vol) {
+		int16 tmp;
+		st_size_t len = *osamp;
+		while (!input.eof() && len--) {
+			tmp = input.read() * vol / 256;
+			clampedAdd(*obuf++, tmp);
+			if (input.isStereo())
+				tmp = input.read() * vol / 256;
+			clampedAdd(*obuf++, tmp);
+		}
+		return (ST_SUCCESS);
+	}
+	virtual int drain(st_sample_t *obuf, st_size_t *osamp, st_volume_t vol) {
+		return (ST_SUCCESS);
+	}
+};
+
+
 #endif
diff --git a/sound/resample.cpp b/sound/resample.cpp
index a621d892139..b2758f4517c 100644
--- a/sound/resample.cpp
+++ b/sound/resample.cpp
@@ -268,11 +268,7 @@ int st_resample_flow(eff_t effp, AudioInputStream &input, st_sample_t *obuf, st_
 	long Nout = 0;	// The number of bytes we effectively output
 	long Nx;		// The number of bytes we will read from input
 	long Nproc;		// The number of bytes we process to generate Nout output bytes
-#if 1	// FIXME: Hack to generate stereo output
-	const long obufSize = *osamp / 2;
-#else
 	const long obufSize = *osamp;
-#endif
 
 TODO: adjust for the changes made to AudioInputStream; add support for stereo
 initially, could just average the left/right channel -> bad for quality of course,
@@ -394,11 +390,7 @@ printf("osamp = %ld, Nout = %ld\n", obufSize, Nout);
 		r->Yposition = 0;
 	
 	// Finally set *osamp to the number of samples we put into the output buffer
-#if 1	// FIXME: Hack to generate stereo output
-	*osamp = numOutSamples * 2;
-#else
 	*osamp = numOutSamples;
-#endif
 
 	return (ST_SUCCESS);
 }