mmal_connection.h

/*
Copyright (c) 2012, Broadcom Europe Ltd
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the copyright holder nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef MMAL_CONNECTION_H
#define MMAL_CONNECTION_H

#ifdef __cplusplus
extern "C" {
#endif

/* @{ */
#define MMAL_CONNECTION_FLAG_TUNNELLING 0x1

#define MMAL_CONNECTION_FLAG_ALLOCATION_ON_INPUT 0x2

#define MMAL_CONNECTION_FLAG_ALLOCATION_ON_OUTPUT 0x4

#define MMAL_CONNECTION_FLAG_KEEP_BUFFER_REQUIREMENTS 0x8

#define MMAL_CONNECTION_FLAG_DIRECT 0x10
/* @} */

typedef struct MMAL_CONNECTION_T MMAL_CONNECTION_T;

typedef void (*MMAL_CONNECTION_CALLBACK_T)(MMAL_CONNECTION_T *connection);

struct MMAL_CONNECTION_T {

   void *user_data;           
   MMAL_CONNECTION_CALLBACK_T callback; 
   uint32_t is_enabled;       
   uint32_t flags;            
   MMAL_PORT_T *in;           
   MMAL_PORT_T *out;          
   MMAL_POOL_T *pool;         
   MMAL_QUEUE_T *queue;       
   const char *name;          
   /* Used for debug / statistics */
   int64_t time_setup;        
   int64_t time_enable;       
   int64_t time_disable;      
};

MMAL_STATUS_T mmal_connection_create(MMAL_CONNECTION_T **connection,
   MMAL_PORT_T *out, MMAL_PORT_T *in, uint32_t flags);

void mmal_connection_acquire(MMAL_CONNECTION_T *connection);

MMAL_STATUS_T mmal_connection_release(MMAL_CONNECTION_T *connection);

MMAL_STATUS_T mmal_connection_destroy(MMAL_CONNECTION_T *connection);

MMAL_STATUS_T mmal_connection_enable(MMAL_CONNECTION_T *connection);

MMAL_STATUS_T mmal_connection_disable(MMAL_CONNECTION_T *connection);

MMAL_STATUS_T mmal_connection_event_format_changed(MMAL_CONNECTION_T *connection,
   MMAL_BUFFER_HEADER_T *buffer);

#ifdef __cplusplus
}
#endif

#endif /* MMAL_CONNECTION_H */