Line-Following-Robot/Input/Externals/raspicam-master/dependencies/mmal/openmaxil/mmalomx_marks.c

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

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      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.

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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
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*/

/** \file
 * OpenMAX IL adaptation layer for MMAL - Marking related functions
 *
 * Note that we do not support buffer marks properly other than for conformance
 * testing. For input ports, we just move the mark over to the output port.
 */

#include "mmalomx.h"
#include "mmalomx_buffer.h"
#include "mmalomx_marks.h"
#include "mmalomx_commands.h"
#include "mmalomx_logging.h"

#define MMALOMX_GET_MARK(port, mark) \
   mark = &port->marks[port->marks_first]; \
   port->marks_num--; \
   port->marks_first = ++port->marks_first == MAX_MARKS_NUM ? 0 : port->marks_first
#define MMALOMX_PUT_MARK(port, mark) \
   port->marks[(port->marks_first + port->marks_num) % MAX_MARKS_NUM] = *mark; \
   port->marks_num++;

void mmalomx_mark_process_incoming(MMALOMX_COMPONENT_T *component,
   MMALOMX_PORT_T *port, OMX_BUFFERHEADERTYPE *omx_buffer)
{
   /* Tag buffers with OMX marks */
   if (!omx_buffer->hMarkTargetComponent && port->marks_num > 0 &&
       port->direction == OMX_DirInput)
   {
      OMX_MARKTYPE *mark;
      MMALOMX_GET_MARK(port, mark);
      omx_buffer->hMarkTargetComponent = mark->hMarkTargetComponent;
      omx_buffer->pMarkData = mark->pMarkData;

      mmalomx_callback_event_handler(component, OMX_EventCmdComplete,
         OMX_CommandMarkBuffer, port->index, NULL);
   }
   /* We do not support buffer marks properly other than for conformance testing.
    * For input ports, we just move the mark over to the output port. */
   if (port->direction == OMX_DirInput && omx_buffer->hMarkTargetComponent)
   {
      OMX_MARKTYPE mark = {omx_buffer->hMarkTargetComponent, omx_buffer->pMarkData};
      unsigned int i;
      for (i = 0; i < component->ports_num; i++)
      {
         if (component->ports[i].direction != OMX_DirOutput ||
             component->ports[i].marks_num >= MAX_MARKS_NUM)
            continue;

         MMALOMX_PUT_MARK((&component->ports[i]), (&mark));
      }
   }
}

void mmalomx_mark_process_outgoing(MMALOMX_COMPONENT_T *component,
   MMALOMX_PORT_T *port, OMX_BUFFERHEADERTYPE *omx_buffer)
{
   /* Tag buffers with OMX marks */
   if (port->direction == OMX_DirOutput &&
       !omx_buffer->hMarkTargetComponent && port->marks_num)
   {
         OMX_MARKTYPE *mark;
         MMALOMX_GET_MARK(port, mark);
         omx_buffer->hMarkTargetComponent = mark->hMarkTargetComponent;
         omx_buffer->pMarkData = mark->pMarkData;
   }
   /* Check if we need to trigger a Mark event */
   if (omx_buffer->hMarkTargetComponent &&
       omx_buffer->hMarkTargetComponent == (OMX_HANDLETYPE)&component->omx)
   {
      mmalomx_callback_event_handler(component, OMX_EventMark, 0, 0, omx_buffer->pMarkData);
      omx_buffer->hMarkTargetComponent = NULL;
      omx_buffer->pMarkData = NULL;
   }
}