/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 * Server Audio 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_RDPSND_SERVER_H

#define FREERDP_CHANNEL_RDPSND_SERVER_H

#include <freerdp/channels/wtsvc.h>

#include <freerdp/channels/rdpsnd.h>

typedef struct _rdpsnd_server_context RdpsndServerContext;

typedef struct _rdpsnd_server_context rdpsnd_server_context;

typedef struct _rdpsnd_server_private RdpsndServerPrivate;

typedef UINT (*psRdpsndStart)(RdpsndServerContext* context);

typedef UINT (*psRdpsndStop)(RdpsndServerContext* context);

typedef UINT (*psRdpsndServerInitialize)(RdpsndServerContext* context, BOOL ownThread);

typedef UINT (*psRdpsndServerSelectFormat)(RdpsndServerContext* context,

                                           UINT16 client_format_index);

typedef UINT (*psRdpsndServerSendSamples)(RdpsndServerContext* context, const void* buf,

                                          int nframes, UINT16 wTimestamp);

typedef UINT (*psRdpsndServerConfirmBlock)(RdpsndServerContext* context, BYTE confirmBlockNum,

                                           UINT16 wtimestamp);

typedef UINT (*psRdpsndServerSetVolume)(RdpsndServerContext* context, int left, int right);

typedef UINT (*psRdpsndServerClose)(RdpsndServerContext* context);

typedef void (*psRdpsndServerActivated)(RdpsndServerContext* context);

struct _rdpsnd_server_context

{

	HANDLE vcm;

	psRdpsndStart Start;

	psRdpsndStop Stop;

	RdpsndServerPrivate* priv;

	/* Server self-defined pointer. */

	void* data;

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

	AUDIO_FORMAT* server_formats;

	size_t num_server_formats;

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

	AUDIO_FORMAT* src_format;

	/* Server audio latency, or buffer size, in milli-seconds. Set by server. */

	int latency;

	/* Client supported formats. */

	AUDIO_FORMAT* client_formats;

	UINT16 num_client_formats;

	UINT16 selected_client_format;

	/* Last sent audio block number. */

	UINT8 block_no;

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

	/**

	 * Initialize the channel. The caller should check the return value to see

	 * whether the initialization succeed. If not, the "Activated" callback

	 * will not be called and the server must not call any API on this context.

	 */

	psRdpsndServerInitialize Initialize;

	/**

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

	 * the client_formats array and must be smaller than num_client_formats.

	 */

	psRdpsndServerSelectFormat SelectFormat;

	/**

	 * Send audio samples. Actually bytes in the buffer must be:

	 * nframes * src_format.nBitsPerSample * src_format.nChannels / 8

	 */

	psRdpsndServerSendSamples SendSamples;

	/**

	 * Called when block confirm is received from the client

	 */

	psRdpsndServerConfirmBlock ConfirmBlock;

	/**

	 * Set the volume level of the client. Valid range is between 0 and 0xFFFF.

	 */

	psRdpsndServerSetVolume SetVolume;

	/**

	 * Close the audio stream.

	 */

	psRdpsndServerClose Close;

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

	/**

	 * The channel has been activated. The server maybe choose audio format and

	 * start audio stream from this point. Note that this callback is called

	 * from a different thread context so the server must be careful of thread

	 * synchronization.

	 */

	psRdpsndServerActivated Activated;

	/**

	 *  MS-RDPEA channel version the client announces

	 */

	UINT16 clientVersion;

	rdpContext* rdpcontext;

};

#ifdef __cplusplus

extern "C"

{

#endif

	FREERDP_API RdpsndServerContext* rdpsnd_server_context_new(HANDLE vcm);

	FREERDP_API void rdpsnd_server_context_reset(RdpsndServerContext*);

	FREERDP_API void rdpsnd_server_context_free(RdpsndServerContext* context);

	FREERDP_API HANDLE rdpsnd_server_get_event_handle(RdpsndServerContext* context);

	FREERDP_API UINT rdpsnd_server_handle_messages(RdpsndServerContext* context);

#ifdef __cplusplus

}

#endif

#endif /* FREERDP_CHANNEL_RDPSND_SERVER_H */