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MIDI: Fix Audio Unit player in several ways

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Improve rendering functions of Audio Unit player, and also fix looping
for the Audio Unit player, and any other possible future players which
use blocked decoding with timestamped events.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
This commit is contained in:
Christopher Snowhill 2025-03-28 01:30:05 -07:00
parent 8cfddb875c
commit 40d9574015
3 changed files with 33 additions and 21 deletions
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4
Plugins/MIDI/MIDI.xcodeproj/project.pbxproj
View file

@ -37,6 +37,7 @@
83B06722180D70FE008E3612 /* MIDIDecoder.mm in Sources */ = {isa = PBXBuildFile; fileRef = 83B06721180D70FE008E3612 /* MIDIDecoder.mm */; };
83C35702180EDB74007E9DF0 /* MIDIContainer.mm in Sources */ = {isa = PBXBuildFile; fileRef = 83C35700180EDB74007E9DF0 /* MIDIContainer.mm */; };
83C35705180EDD1C007E9DF0 /* MIDIMetadataReader.mm in Sources */ = {isa = PBXBuildFile; fileRef = 83C35703180EDD1C007E9DF0 /* MIDIMetadataReader.mm */; };
83E83F7B2D9654470054365C /* Accelerate.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 83E83F7A2D9654470054365C /* Accelerate.framework */; };
83E973471C4378880007F413 /* AUPlayer.mm in Sources */ = {isa = PBXBuildFile; fileRef = 83E973451C4378880007F413 /* AUPlayer.mm */; };
83EA54232A6A6CF400CD0580 /* libbass_mpc.dylib in CopyFiles */ = {isa = PBXBuildFile; fileRef = 83EA54212A6A6CE200CD0580 /* libbass_mpc.dylib */; settings = {ATTRIBUTES = (CodeSignOnCopy, ); }; };
/* End PBXBuildFile section */
@ -155,6 +156,7 @@
83C35701180EDB74007E9DF0 /* MIDIContainer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MIDIContainer.h; sourceTree = "<group>"; };
83C35703180EDD1C007E9DF0 /* MIDIMetadataReader.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = MIDIMetadataReader.mm; sourceTree = "<group>"; };
83C35704180EDD1C007E9DF0 /* MIDIMetadataReader.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = MIDIMetadataReader.h; sourceTree = "<group>"; };
83E83F7A2D9654470054365C /* Accelerate.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Accelerate.framework; path = System/Library/Frameworks/Accelerate.framework; sourceTree = SDKROOT; };
83E973451C4378880007F413 /* AUPlayer.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = AUPlayer.mm; sourceTree = "<group>"; };
83E973461C4378880007F413 /* AUPlayer.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AUPlayer.h; sourceTree = "<group>"; };
83EA54212A6A6CE200CD0580 /* libbass_mpc.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; name = libbass_mpc.dylib; path = ../../ThirdParty/BASS/libbass_mpc.dylib; sourceTree = "<group>"; };
@ -168,6 +170,7 @@
buildActionMask = 2147483647;
files = (
834D190C2D7F954100F13B89 /* CogAudio.framework in Frameworks */,
83E83F7B2D9654470054365C /* Accelerate.framework in Frameworks */,
8398F2E01C438C7D00EB9639 /* AudioUnit.framework in Frameworks */,
83686AB11C5C783000671C7A /* CoreAudioKit.framework in Frameworks */,
83B06701180D5747008E3612 /* midi_processing.framework in Frameworks */,
@ -281,6 +284,7 @@
83B06689180D5668008E3612 /* Frameworks */ = {
isa = PBXGroup;
children = (
83E83F7A2D9654470054365C /* Accelerate.framework */,
834D190B2D7F954100F13B89 /* CogAudio.framework */,
83686AB01C5C783000671C7A /* CoreAudioKit.framework */,
83686AAE1C5C780500671C7A /* AudioToolbox.framework */,

32
Plugins/MIDI/MIDI/AUPlayer.mm
View file

@ -1,6 +1,8 @@
#include "AUPlayer.h"
#import "AUPlayer.h"
#include <stdlib.h>
#import <stdlib.h>
#import <Accelerate/Accelerate.h>
#define SF2PACK
@ -82,29 +84,33 @@ void AUPlayer::send_sysex_time(const uint8_t *data, size_t size, size_t port, un
}
void AUPlayer::render(float *out, unsigned long count) {
float *ptrL, *ptrR;
memset(out, 0, count * sizeof(float) * 2);
const float *ptrL, *ptrR;
bzero(out, count * sizeof(float) * 2);
while(count) {
UInt32 numberFrames = count > BLOCK_SIZE ? BLOCK_SIZE : (UInt32)count;
for(unsigned long i = 0; i < 3; ++i) {
AudioUnitRenderActionFlags ioActionFlags = 0;
bufferList->mNumberBuffers = 2;
for(unsigned long j = 0; j < 2; j++) {
bufferList->mBuffers[j].mNumberChannels = 1;
bufferList->mBuffers[j].mDataByteSize = (UInt32)(numberFrames * sizeof(float));
bufferList->mBuffers[j].mData = audioBuffer + j * BLOCK_SIZE;
memset(bufferList->mBuffers[j].mData, 0, numberFrames * sizeof(float));
bzero(bufferList->mBuffers[j].mData, numberFrames * sizeof(float));
}
AudioUnitRender(samplerUnit[i], &ioActionFlags, &mTimeStamp, 0, numberFrames, bufferList);
ptrL = (float *)bufferList->mBuffers[0].mData;
ptrR = (float *)bufferList->mBuffers[1].mData;
for(unsigned long j = 0; j < numberFrames; ++j) {
out[j * 2 + 0] += ptrL[j];
out[j * 2 + 1] += ptrR[j];
}
ptrL = (const float *)bufferList->mBuffers[0].mData;
ptrR = (const float *)bufferList->mBuffers[1].mData;
size_t numBytesL = bufferList->mBuffers[0].mDataByteSize;
size_t numBytesR = bufferList->mBuffers[1].mDataByteSize;
size_t numBytes = MIN(numBytesL, numBytesR);
size_t numFrames = numBytes / sizeof(float);
numFrames = MIN(numFrames, numberFrames);
vDSP_vadd(ptrL, 1, out, 2, out, 2, numFrames);
vDSP_vadd(ptrR, 1, out + 1, 2, out + 1, 2, numFrames);
}
out += numberFrames * 2;
@ -214,7 +220,7 @@ static OSStatus renderCallback(void *inRefCon, AudioUnitRenderActionFlags *ioAct
int k = inNumberFrames * sizeof(float);
if(k > ioData->mBuffers[i].mDataByteSize)
k = ioData->mBuffers[i].mDataByteSize;
memset(ioData->mBuffers[i].mData, 0, k);
bzero(ioData->mBuffers[i].mData, k);
}
}
@ -222,7 +228,7 @@ static OSStatus renderCallback(void *inRefCon, AudioUnitRenderActionFlags *ioAct
}
bool AUPlayer::startup() {
if(bufferList) return true;
if(initialized) return true;
AudioComponentDescription cd = { 0 };
cd.componentType = kAudioUnitType_MusicDevice;

18
Plugins/MIDI/MIDI/MIDIPlayer.cpp
View file

@ -148,8 +148,8 @@ unsigned long MIDIPlayer::Play(float *out, unsigned long count) {
for(; uStreamPosition < stream_end; uStreamPosition++) {
const midi_stream_event &me = mStream.at(uStreamPosition);
unsigned long samples_todo = me.m_timestamp - uTimeCurrent - into_block;
if(samples_todo) {
ssize_t samples_todo = me.m_timestamp - uTimeCurrent - into_block;
if(samples_todo > 0) {
if(samples_todo > count - done) {
uSamplesRemaining = samples_todo - (count - done);
samples_todo = count - done;
@ -167,12 +167,14 @@ unsigned long MIDIPlayer::Play(float *out, unsigned long count) {
}
if(needs_block_size) {
into_block += samples_todo;
while(into_block >= needs_block_size) {
render(out + done * 2, needs_block_size);
done += needs_block_size;
into_block -= needs_block_size;
uTimeCurrent += needs_block_size;
if(samples_todo > 0) {
into_block += samples_todo;
while(into_block >= needs_block_size) {
render(out + done * 2, needs_block_size);
done += needs_block_size;
into_block -= needs_block_size;
uTimeCurrent += needs_block_size;
}
}
send_event_time_filtered(me.m_event, into_block);
} else