j.foucher/PS_AI_Agent
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Fix raw PCM multicast exceeding UE5 replicated array limit

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UE5 limits replicated TArrays to 65535 elements. ElevenLabs sends
audio chunks up to ~72K bytes, exceeding this limit when sent as
raw PCM. Split into 32000-byte sub-chunks (1s of 16kHz 16-bit mono)
before calling MulticastReceiveAgentAudio.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
j.foucher 2026-03-02 15:04:33 +01:00
parent 6cac56fa06
commit fc728454d0
1 changed files with 13 additions and 2 deletions
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15
Unreal/PS_AI_Agent/Plugins/PS_AI_ConvAgent/Source/PS_AI_ConvAgent/Private/PS_AI_ConvAgent_ElevenLabsComponent.cpp
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@ -658,14 +658,25 @@ void UPS_AI_ConvAgent_ElevenLabsComponent::HandleAudioReceived(const TArray<uint
{
// Fallback: send raw PCM (no compression). ~32 KB/s at 16kHz 16-bit mono.
// Fine for LAN; revisit with proper Opus if internet play is needed.
// UE5 limits replicated TArrays to 65535 elements, so we must chunk.
static bool bWarnedOnce = false;
if (!bWarnedOnce)
{
bWarnedOnce = true;
UE_LOG(LogPS_AI_ConvAgent_ElevenLabs, Warning,
TEXT("[NET-SRV] Opus encoder unavailable — sending raw PCM (no compression)."));
TEXT("[NET-SRV] Opus encoder unavailable — sending raw PCM in chunks (no compression)."));
}
static constexpr int32 MaxChunkBytes = 32000; // 1s of 16kHz 16-bit mono, well under 65535 limit
int32 Offset = 0;
while (Offset < PCMData.Num())
{
const int32 ChunkSize = FMath::Min(MaxChunkBytes, PCMData.Num() - Offset);
TArray<uint8> Chunk;
Chunk.Append(PCMData.GetData() + Offset, ChunkSize);
MulticastReceiveAgentAudio(Chunk);
Offset += ChunkSize;
}
MulticastReceiveAgentAudio(PCMData);
}
}