/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 * Server Audio Input Virtual Channel

 *

 * Copyright 2012 Vic Lee

 * Copyright 2015 Thincast Technologies GmbH

 * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *	 http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#ifndef FREERDP_CHANNEL_AUDIN_SERVER_H

#define FREERDP_CHANNEL_AUDIN_SERVER_H

#include <freerdp/codec/audio.h>

#include <freerdp/channels/wtsvc.h>

#include <freerdp/channels/rdpsnd.h>

typedef struct _audin_server_context audin_server_context;

typedef UINT(*psAudinServerSelectFormat)(audin_server_context* context, size_t client_format_index);

typedef BOOL (*psAudinServerOpen)(audin_server_context* context);

typedef BOOL (*psAudinServerIsOpen)(audin_server_context* context);

typedef BOOL (*psAudinServerClose)(audin_server_context* context);

typedef UINT(*psAudinServerOpening)(audin_server_context* context);

typedef UINT(*psAudinServerOpenResult)(audin_server_context* context, UINT32 result);

typedef UINT(*psAudinServerReceiveSamples)(audin_server_context* context,

        const AUDIO_FORMAT* format, wStream* buf,

        size_t nframes);

struct _audin_server_context

{

	HANDLE vcm;

	/* Server self-defined pointer. */

	void* data;

	/* Server supported formats. Set by server. */

	AUDIO_FORMAT* server_formats;

	size_t num_server_formats;

	/* Server destination PCM audio format. Set by server. */

	AUDIO_FORMAT* dst_format;

	/* Server preferred frames per packet. */

	int frames_per_packet;

	/* Client supported formats. */

	AUDIO_FORMAT* client_formats;

	size_t num_client_formats;

	SSIZE_T selected_client_format;

	/*** APIs called by the server. ***/

	/**

	 * Choose the audio format to be received. The index argument is an index into

	 * the client_formats array and must be smaller than num_client_formats.

	 */

	psAudinServerSelectFormat SelectFormat;

	/**

	 * Open the audio input stream.

	 */

	psAudinServerOpen Open;

	psAudinServerIsOpen IsOpen;

	/**

	 * Close the audio stream.

	 */

	psAudinServerClose Close;

	/*** Callbacks registered by the server. ***/

	/**

	 * It's ready to open the audio input stream. The server should examine client

	 * formats and call SelectFormat to choose the desired one in this callback.

	 */

	psAudinServerOpening Opening;

	/**

	 * Client replied HRESULT of the open operation.

	 */

	psAudinServerOpenResult OpenResult;

	/**

	 * Receive audio samples. Actual bytes in the buffer is:

	 * nframes * dst_format.nBitsPerSample * dst_format.nChannels / 8

	 * Note that this callback is called from a different thread context so the

	 * server must be careful of thread synchronization.

	 */

	psAudinServerReceiveSamples ReceiveSamples;

	rdpContext* rdpcontext;

};

#ifdef __cplusplus

extern "C" {

#endif

FREERDP_API audin_server_context* audin_server_context_new(HANDLE vcm);

FREERDP_API void audin_server_context_free(audin_server_context* context);

#ifdef __cplusplus

}

#endif

#endif /* FREERDP_CHANNEL_AUDIN_SERVER_H */