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88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/* ----------------------------------------------------------------------
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* Project: CMSIS DSP Library
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* Title: StreamingSource.h
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* Description: Streaming source working with the Ring buffer
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*
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* $Date: 30 July 2021
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* $Revision: V1.10.0
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*
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* Target Processor: Cortex-M and Cortex-A cores
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* -------------------------------------------------------------------- */
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/*
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* Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _STREAMING_SOURCE_H_
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#define _STREAMING_SOURCE_H_
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#include "RingBuffer.h"
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/* This is deprecated. Don't use it */
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template<typename OUT,int outputSize>
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class StreamingSource: public GenericSource<OUT,outputSize>
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{
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public:
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StreamingSource(FIFOBase<OUT> &dst,ring_config_t *config):
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GenericSource<OUT,outputSize>(dst),mConfig(config){};
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int prepareForRunning() override
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{
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if (this->willUnderflow()
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)
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{
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return(CG_SKIP_EXECUTION_ID_CODE); // Skip execution
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}
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return(0);
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};
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int run() override
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{
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OUT *b=this->getWriteBuffer();
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/*
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Try to reserve a buffer. If no buffer is available, the task running
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this node will sleep.
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If there is a timeout (configured when the ring buffer was initialized)
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the function will return a NULL pointer.
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*/
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int bufID=ringUserReserveBuffer(mConfig);
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uint8_t *buf=ringGetBufferAddress(mConfig,bufID);
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if (buf != NULL)
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{
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/* If a buffer is available we copy the data to the FIFO
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*/
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memcpy((void*)b,buf,outputSize*sizeof(OUT));
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/* We release the buffer so than it can be used by the interrupt */
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ringUserReleaseBuffer(mConfig);
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return(0);
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}
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else
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{
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return(mConfig->error);
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}
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};
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protected:
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ring_config_t *mConfig;
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};
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#endif /* _STREAMING_SOURCE_H_ */ |