From 385ed457dd4f78717b00a3673ef40def324021ae Mon Sep 17 00:00:00 2001
From: Robert Kausch <robert.kausch@freac.org>
Date: Sat, 22 Jan 2022 12:40:24 +0100
Subject: [PATCH] Fix Apple Lossless MD5 calculation.

---
 components/decoder/alac/alac.cpp | 10 ++++++++++
 components/decoder/alac/alac.h   |  3 ++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/components/decoder/alac/alac.cpp b/components/decoder/alac/alac.cpp
index d17b90ad..107b0e4c 100644
--- a/components/decoder/alac/alac.cpp
+++ b/components/decoder/alac/alac.cpp
@@ -166,6 +166,7 @@ BoCA::DecoderALAC::DecoderALAC()
 	sampleId	 = 1;
 
 	skipSamples	 = 0;
+	samplesLeft	 = 0;
 }
 
 BoCA::DecoderALAC::~DecoderALAC()
@@ -183,6 +184,8 @@ Bool BoCA::DecoderALAC::Activate()
 
 	driver->Seek(0);
 
+	samplesLeft = track.length;
+
 	/* Get codec configuration.
 	 */
 	unsigned char	*ascBuffer     = NIL;
@@ -221,6 +224,7 @@ Bool BoCA::DecoderALAC::Seek(Int64 samplePosition)
 
 	sampleId    = ex_MP4GetSampleIdFromTime(mp4File, mp4Track, time, true);
 	skipSamples = time - ex_MP4GetSampleTime(mp4File, mp4Track, sampleId);
+	samplesLeft = track.length - samplePosition;
 
 	return True;
 }
@@ -267,6 +271,12 @@ Int BoCA::DecoderALAC::ReadData(Buffer<UnsignedByte> &data)
 		skipSamples -= samplesToSkip;
 	}
 
+	/* Cut data buffer on last frame.
+	 */
+	data.Resize(Math::Min(data.Size(), samplesLeft * bytesPerSample));
+
+	samplesLeft -= data.Size() / bytesPerSample;
+
 	/* Change to default channel order.
 	 */
 	if	(format.channels == 3) Utilities::ChangeChannelOrder(data, format, Channel::AAC_3_0, Channel::Default_3_0);
diff --git a/components/decoder/alac/alac.h b/components/decoder/alac/alac.h
index 4241ff0a..84794fdd 100644
--- a/components/decoder/alac/alac.h
+++ b/components/decoder/alac/alac.h
@@ -1,5 +1,5 @@
  /* BoCA - BonkEnc Component Architecture
-  * Copyright (C) 2007-2021 Robert Kausch <robert.kausch@freac.org>
+  * Copyright (C) 2007-2022 Robert Kausch <robert.kausch@freac.org>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
@@ -29,6 +29,7 @@ namespace BoCA
 			MP4SampleId		 sampleId;
 
 			UnsignedInt		 skipSamples;
+			UnsignedInt64		 samplesLeft;
 
 			Buffer<unsigned char>	 dataBuffer;