SoundEmitter: Make SE source count configurable

Default is still 6.

mkxp.conf.sample

@@ -173,6 +173,14 @@
 # midi.reverb=false
 
 
+# Number of OpenAL sources to allocate for SE playback.
+# If there are a lot of sounds playing at the same time
+# and audibly cutting each other off, try increasing
+# this number. Maximum: 64.
+#
+# SE.sourceCount=6
+
+
 # Give a hint on which language the game title as
 # specified in the Game.ini is, useful if the encoding
 # is being falsely detected. Relevant only if mkxp was

src/audio.cpp

@@ -60,10 +60,11 @@ struct AudioPrivate
 		MeWatchState state;
 	} meWatch;
 
-	AudioPrivate()
+	AudioPrivate(const Config &conf)
 	    : bgm(ALStream::Looped, "bgm"),
 	      bgs(ALStream::Looped, "bgs"),
-	      me(ALStream::NotLooped, "me")
+	      me(ALStream::NotLooped, "me"),
+	      se(conf)
 	{
 		meWatch.active = false;
 		meWatch.termReq = false;
@@ -238,8 +239,8 @@ struct AudioPrivate
 	}
 };
 
-Audio::Audio()
-	: p(new AudioPrivate)
+Audio::Audio(const Config &conf)
+	: p(new AudioPrivate(conf))
 {}
 
 

src/audio.h

@@ -33,6 +33,7 @@
  *   quite make out their meaning yet) */
 
 struct AudioPrivate;
+struct Config;
 
 class Audio
 {
@@ -75,7 +76,7 @@ public:
 #endif
 
 private:
-	Audio();
+	Audio(const Config &conf);
 	~Audio();
 
 	friend struct SharedStatePrivate;

src/config.cpp

@@ -141,6 +141,7 @@ Config::Config()
 {
 	midi.chorus = false;
 	midi.reverb = false;
+	SE.sourceCount = 6;
 }
 
 void Config::read(int argc, char *argv[])
@@ -165,6 +166,7 @@ void Config::read(int argc, char *argv[])
 	PO_DESC(midi.soundFont, std::string) \
 	PO_DESC(midi.chorus, bool) \
 	PO_DESC(midi.reverb, bool) \
+	PO_DESC(SE.sourceCount, int) \
 	PO_DESC(customScript, std::string) \
 	PO_DESC(pathCache, bool) \
 	PO_DESC(useScriptNames, bool)
@@ -221,6 +223,8 @@ void Config::read(int argc, char *argv[])
 
 #undef PO_DESC
 #undef PO_DESC_ALL
+
+	SE.sourceCount = clamp(SE.sourceCount, 1, 64);
 }
 
 static std::string baseName(const std::string &path)

src/config.h

@@ -66,6 +66,11 @@ struct Config
 		bool reverb;
 	} midi;
 
+	struct
+	{
+		int sourceCount;
+	} SE;
+
 	bool useScriptNames;
 
 	std::string customScript;

src/sharedstate.cpp

@@ -107,6 +107,7 @@ struct SharedStatePrivate
 	      midiState(threadData->config),
 #endif
 	      graphics(threadData),
+	      audio(threadData->config),
 	      fontState(threadData->config),
 	      stampCounter(0)
 	{

src/soundemitter.cpp

@@ -24,6 +24,7 @@
 #include "sharedstate.h"
 #include "filesystem.h"
 #include "exception.h"
+#include "config.h"
 #include "util.h"
 
 #include <SDL_sound.h>
@@ -76,7 +77,7 @@ private:
 
 /* Before: [a][b][c][d], After (index=1): [a][c][d][b] */
 static void
-arrayPushBack(size_t array[], size_t size, size_t index)
+arrayPushBack(std::vector<size_t> &array, size_t size, size_t index)
 {
 	size_t v = array[index];
 
@@ -86,10 +87,14 @@ arrayPushBack(size_t array[], size_t size, size_t index)
 	array[size-1] = v;
 }
 
-SoundEmitter::SoundEmitter()
-	: bufferBytes(0)
+SoundEmitter::SoundEmitter(const Config &conf)
+    : bufferBytes(0),
+      srcCount(conf.SE.sourceCount),
+      alSrcs(srcCount),
+      atchBufs(srcCount),
+      srcPrio(srcCount)
 {
-	for (int i = 0; i < SE_SOURCES; ++i)
+	for (size_t i = 0; i < srcCount; ++i)
 	{
 		alSrcs[i] = AL::Source::gen();
 		atchBufs[i] = 0;
@@ -99,7 +104,7 @@ SoundEmitter::SoundEmitter()
 
 SoundEmitter::~SoundEmitter()
 {
-	for (int i = 0; i < SE_SOURCES; ++i)
+	for (size_t i = 0; i < srcCount; ++i)
 	{
 		AL::Source::stop(alSrcs[i]);
 		AL::Source::del(alSrcs[i]);
@@ -124,24 +129,24 @@ void SoundEmitter::play(const std::string &filename,
 
 	/* Try to find first free source */
 	size_t i;
-	for (i = 0; i < SE_SOURCES; ++i)
+	for (i = 0; i < srcCount; ++i)
 		if (AL::Source::getState(alSrcs[srcPrio[i]]) != AL_PLAYING)
 			break;
 
 	/* If we didn't find any, try to find the lowest priority source
 	 * with the same buffer to overtake */
-	if (i == SE_SOURCES)
-		for (size_t j = 0; j < SE_SOURCES; ++j)
+	if (i == srcCount)
+		for (size_t j = 0; j < srcCount; ++j)
 			if (atchBufs[srcPrio[j]] == buffer)
 				i = j;
 
 	/* If we didn't find any, overtake the one with lowest priority */
-	if (i == SE_SOURCES)
+	if (i == srcCount)
 		i = 0;
 
 	/* Push the used source to the back of the priority list */
 	size_t srcIndex = srcPrio[i];
-	arrayPushBack(srcPrio, SE_SOURCES, i);
+	arrayPushBack(srcPrio, srcCount, i);
 
 	AL::Source::ID src = alSrcs[srcIndex];
 	AL::Source::stop(src);
@@ -164,7 +169,7 @@ void SoundEmitter::play(const std::string &filename,
 
 void SoundEmitter::stop()
 {
-	for (int i = 0; i < SE_SOURCES; i++)
+	for (size_t i = 0; i < srcCount; i++)
 		AL::Source::stop(alSrcs[i]);
 }
 

src/soundemitter.h

@@ -27,10 +27,10 @@
 #include "boost-hash.h"
 
 #include <string>
-
-#define SE_SOURCES 6
+#include <vector>
 
 struct SoundBuffer;
+struct Config;
 
 struct SoundEmitter
 {
@@ -42,13 +42,14 @@ struct SoundEmitter
 	/* Byte count sum of all cached / playing buffers */
 	uint32_t bufferBytes;
 
-	AL::Source::ID alSrcs[SE_SOURCES];
-	SoundBuffer *atchBufs[SE_SOURCES];
+	const size_t srcCount;
+	std::vector<AL::Source::ID> alSrcs;
+	std::vector<SoundBuffer*> atchBufs;
 
 	/* Indices of sources, sorted by priority (lowest first) */
-	size_t srcPrio[SE_SOURCES];
+	std::vector<size_t> srcPrio;
 
-	SoundEmitter();
+	SoundEmitter(const Config &conf);
 	~SoundEmitter();
 
 	void play(const std::string &filename,