From fe3a43e2d4bbc20cea32a2046404d8eabe9240ee Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Sun, 25 Oct 2009 06:26:19 -0700
Subject: [PATCH] Remove the format and frequency from the source, get them
 manually

---
 Alc/ALu.c                   | 31 ++++++++++++++++++++++++-------
 OpenAL32/Include/alSource.h |  2 --
 OpenAL32/alSource.c         |  6 ------
 3 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/Alc/ALu.c b/Alc/ALu.c
index d1ff8dec..a782ac16 100644
--- a/Alc/ALu.c
+++ b/Alc/ALu.c
@@ -832,10 +832,11 @@ static void MixSomeSources(ALCcontext *ALContext, float (*DryBuffer)[OUTPUTCHANN
     FILTER *DryFilter, *WetFilter[MAX_SENDS];
     ALfloat WetSend[MAX_SENDS];
     ALuint rampLength;
-    ALuint frequency;
+    ALuint DeviceFreq;
     ALint increment;
     ALuint DataPosInt, DataPosFrac;
     ALuint Channels, Bytes;
+    ALuint Frequency;
     ALuint BuffersPlayed;
     ALfloat Pitch;
     ALenum State;
@@ -843,9 +844,9 @@ static void MixSomeSources(ALCcontext *ALContext, float (*DryBuffer)[OUTPUTCHANN
     if(!(ALSource=ALContext->Source))
         return;
 
-    frequency = ALContext->Device->Frequency;
+    DeviceFreq = ALContext->Device->Frequency;
 
-    rampLength = frequency * MIN_RAMP_LENGTH / 1000;
+    rampLength = DeviceFreq * MIN_RAMP_LENGTH / 1000;
     rampLength = max(rampLength, SamplesToDo);
 
 another_source:
@@ -858,18 +859,33 @@ another_source:
     }
     j = 0;
 
+    /* Find buffer format */
+    Frequency = 0;
+    Channels = 0;
+    Bytes = 0;
+    BufferListItem = ALSource->queue;
+    while(BufferListItem != NULL)
+    {
+        ALbuffer *ALBuffer;
+        if((ALBuffer=BufferListItem->buffer) != NULL)
+        {
+            Channels  = aluChannelsFromFormat(ALBuffer->format);
+            Bytes     = aluBytesFromFormat(ALBuffer->format);
+            Frequency = ALBuffer->frequency;
+            break;
+        }
+        BufferListItem = BufferListItem->next;
+    }
+
     /* Get source info */
     BuffersPlayed = ALSource->BuffersPlayed;
     DataPosInt    = ALSource->position;
     DataPosFrac   = ALSource->position_fraction;
 
-    Channels = aluChannelsFromFormat(ALSource->Format);
-    Bytes    = aluBytesFromFormat(ALSource->Format);
-
     CalcSourceParams(ALContext, ALSource, (Channels==1)?AL_TRUE:AL_FALSE);
 
     /* Compute 18.14 fixed point step */
-    Pitch = (ALSource->Params.Pitch*ALSource->Frequency) / frequency;
+    Pitch = (ALSource->Params.Pitch*Frequency) / DeviceFreq;
     if(Pitch > (float)MAX_PITCH)  Pitch = (float)MAX_PITCH;
     increment = (ALint)(Pitch*(ALfloat)(1L<<FRACTIONBITS));
     if(increment <= 0)  increment = (1<<FRACTIONBITS);
@@ -914,6 +930,7 @@ another_source:
         Matrix[FRONT_RIGHT][BACK_RIGHT] = 0.0f;
     }
 
+    /* Get current buffer queue item */
     BufferListItem = ALSource->queue;
     for(i = 0;i < BuffersPlayed && BufferListItem;i++)
         BufferListItem = BufferListItem->next;
diff --git a/OpenAL32/Include/alSource.h b/OpenAL32/Include/alSource.h
index 7f18eee3..663a9e35 100644
--- a/OpenAL32/Include/alSource.h
+++ b/OpenAL32/Include/alSource.h
@@ -52,8 +52,6 @@ typedef struct ALsource
     ALuint       position_fraction;
 
     struct ALbuffer *Buffer;
-    ALenum       Format;
-    ALuint       Frequency;
 
     struct ALbufferlistitem *queue; // Linked list of buffers in queue
     ALuint       BuffersInQueue;    // Number of buffers in queue
diff --git a/OpenAL32/alSource.c b/OpenAL32/alSource.c
index 85b9c966..b606d9fd 100644
--- a/OpenAL32/alSource.c
+++ b/OpenAL32/alSource.c
@@ -535,9 +535,6 @@ ALAPI ALvoid ALAPIENTRY alSourcei(ALuint source,ALenum eParam,ALint lValue)
                             // Source is now in STATIC mode
                             pSource->lSourceType = AL_STATIC;
 
-                            pSource->Format    = buffer->format;
-                            pSource->Frequency = buffer->frequency;
-
                             // Add the selected buffer to the queue
                             pALBufferListItem = malloc(sizeof(ALbufferlistitem));
                             pALBufferListItem->buffer = buffer;
@@ -1589,9 +1586,6 @@ ALAPI ALvoid ALAPIENTRY alSourceQueueBuffers( ALuint source, ALsizei n, const AL
                 // Change Source Type
                 ALSource->lSourceType = AL_STREAMING;
 
-                ALSource->Format    = iFormat;
-                ALSource->Frequency = iFrequency;
-
                 if(buffers[0])
                     buffer = (ALbuffer*)ALTHUNK_LOOKUPENTRY(buffers[0]);
 
-- 
2.11.4.GIT