package audio

// audio doesn't import ntgcalls directly so it builds and tests without
// CGO + libntgcalls; ntgadapter bridges *ntgcalls.Client to NtgClient

// one 10ms s16-LE interleaved PCM frame from ntgcalls
type PCMFrame struct {
	SSRC uint32
	Data []byte // 1920 bytes for 48k stereo 10ms
}

// batch handler for PCM frames already filtered down to
// (PlaybackStream, MicrophoneStream) by the adapter
type NtgFrameHandler func(chatID int64, frames []PCMFrame)

// bridge's view of ntgcalls
type NtgClient interface {
	// returned cancel drops the handler; the Go ntgcalls binding has no
	// unregister, so we own the dispatch list ourselves
	OnFrame(NtgFrameHandler) func()

	// capture=true: gateway sends to peer; capture=false: gateway receives
	SetExternalMicrophone(chatID int64, capture bool, sampleRate uint32, channels uint8) error

	ClearStreams(chatID int64) error

	// ships one 10ms s16-LE stereo PCM frame
	SendMicrophonePCM(chatID int64, pcm []byte) error
}