mirror of
https://github.com/libretro/RetroArch
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126 lines
4.2 KiB
C
126 lines
4.2 KiB
C
/*
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Copyright (c) 2012, Broadcom Europe Ltd
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "mmal.h"
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#include "core/mmal_component_private.h"
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#include "core/mmal_port_private.h"
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#include "mmal_logging.h"
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#define NULLSINK_PORTS_NUM 1
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/** Destroy a previously created component */
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static MMAL_STATUS_T null_sink_component_destroy(MMAL_COMPONENT_T *component)
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{
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if(component->input_num)
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mmal_ports_free(component->input, component->input_num);
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return MMAL_SUCCESS;
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}
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/** Enable processing on a port */
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static MMAL_STATUS_T null_sink_port_enable(MMAL_PORT_T *port, MMAL_PORT_BH_CB_T cb)
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{
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MMAL_PARAM_UNUSED(port);
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MMAL_PARAM_UNUSED(cb);
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return MMAL_SUCCESS;
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}
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/** Flush a port */
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static MMAL_STATUS_T null_sink_port_flush(MMAL_PORT_T *port)
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{
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MMAL_PARAM_UNUSED(port);
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return MMAL_SUCCESS;
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}
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/** Disable processing on a port */
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static MMAL_STATUS_T null_sink_port_disable(MMAL_PORT_T *port)
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{
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MMAL_PARAM_UNUSED(port);
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return MMAL_SUCCESS;
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}
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/** Send a buffer header to a port */
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static MMAL_STATUS_T null_sink_port_send(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
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{
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MMAL_BOOL_T eos = buffer->flags & MMAL_BUFFER_HEADER_FLAG_EOS;
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/* Send buffer back */
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buffer->length = 0;
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mmal_port_buffer_header_callback(port, buffer);
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/* Generate EOS events */
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if(eos)
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return mmal_event_eos_send(port);
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return MMAL_SUCCESS;
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}
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/** Set format on a port */
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static MMAL_STATUS_T null_sink_port_format_commit(MMAL_PORT_T *port)
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{
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MMAL_PARAM_UNUSED(port);
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return MMAL_SUCCESS;
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}
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/** Create an instance of a component */
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static MMAL_STATUS_T mmal_component_create_null_sink(const char *name, MMAL_COMPONENT_T *component)
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{
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MMAL_STATUS_T status = MMAL_ENOMEM;
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unsigned int i;
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MMAL_PARAM_UNUSED(name);
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component->priv->pf_destroy = null_sink_component_destroy;
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/* Allocate all the ports for this component */
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component->input = mmal_ports_alloc(component, NULLSINK_PORTS_NUM, MMAL_PORT_TYPE_INPUT, 0);
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if(!component->input)
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goto error;
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component->input_num = NULLSINK_PORTS_NUM;
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for(i = 0; i < component->input_num; i++)
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{
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component->input[i]->priv->pf_enable = null_sink_port_enable;
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component->input[i]->priv->pf_disable = null_sink_port_disable;
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component->input[i]->priv->pf_flush = null_sink_port_flush;
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component->input[i]->priv->pf_send = null_sink_port_send;
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component->input[i]->priv->pf_set_format = null_sink_port_format_commit;
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component->input[i]->buffer_num_min = 1;
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component->input[i]->buffer_num_recommended = 1;
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}
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return MMAL_SUCCESS;
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error:
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null_sink_component_destroy(component);
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return status;
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}
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MMAL_CONSTRUCTOR(mmal_register_component_null_sink);
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void mmal_register_component_null_sink(void)
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{
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mmal_component_supplier_register("null_sink", mmal_component_create_null_sink);
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}
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