FPC_SetSoundListener

Syntax

typedef HRESULT (WINAPI *PSOUNDLISTENER)(
  HFPC hFPC,
  LPARAM lParam,
  PWAVEFORMATEX pWaveFormat,
  LPWAVEHDR pWaveHeader,
  UINT nHeaderSize
);
 
DWORD WINAPI FPC_SetSoundListener(
  HFPC hFPC,
  PSOUNDLISTENER pSoundListener,
  LPARAM lParam
);

Description

The FPC_SetSoundListener function registers a handler that is invoked every time Flash produces audio output.

The callback receives:

pWaveFormat — a pointer to a WAVEFORMATEX structure describing the audio format (sample rate, channels, etc.).
pWaveHeader — a pointer to a WAVEHDR buffer containing raw sound data.
nHeaderSize — the size of the buffer.

This enables capturing, processing, or redirecting Flash audio in real time.

Example

// Example: simple sound listener
HRESULT WINAPI MySoundListener(
    HFPC hFPC,
    LPARAM lParam,
    PWAVEFORMATEX pWaveFormat,
    LPWAVEHDR pWaveHeader,
    UINT nHeaderSize)
{
    // Inspect format
    printf("Channels: %d, Samples per sec: %lu\n",
           pWaveFormat->nChannels,
           pWaveFormat->nSamplesPerSec);
 
    // Access audio buffer
    BYTE* pData = (BYTE*)pWaveHeader->lpData;
    DWORD dwLength = pWaveHeader->dwBufferLength;
 
    // Example: mute by zeroing out data
    ZeroMemory(pData, dwLength);
 
    return S_OK;
}
 
...
 
// Register the listener
DWORD cookie = FPC_SetSoundListener(hFPC, &MySoundListener, 0);