MediaFilter.cpp

/*******************************************************************************
 * Copyright (c) 2024, 2026, Olivier Ayache.  All rights reserved.
 *
 * This file is part of AVPKit.
 *
 * AVPKit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AVPKit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with AVPKit.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
 
#include "MediaFilter.h"
#include "BufferSink.h"
#include <com/avpkit/ferry/Logger.h>
 
VS_LOG_SETUP(VS_CPP_PACKAGE);
 
namespace com {
    namespace avpkit {
        namespace core {
 
            MediaFilter* MediaFilter::make(AVFilterGraph* graph, const char* name) {
                MediaFilter* retval = MediaFilter::make();
                if (retval) {
                    retval->mFilter = avfilter_get_by_name(name);
                    retval->mFilterContext = avfilter_graph_alloc_filter(graph, retval->mFilter, name);
                    if (!retval->mFilterContext) {
                        VS_REF_RELEASE(retval);
                    }
                }
                return retval;
            }
 
            int MediaFilter::addFilter(IMediaFilter* filter) {
                MediaFilter* f = dynamic_cast<MediaFilter*> (filter);
                //VS_LOG_WARN("type of filter %s %p %p", typeid (filter).name(), f, filter);
                if (f) {
                    return avfilter_link(mFilterContext, getAvailableOutput(), f->getAVFilter(), f->getAvailableInput());
                }
                return -1;
            }
            
            int MediaFilter::addSink(IBufferSink* filter) {
                BufferSink* f = dynamic_cast<BufferSink*> (filter);
                if (f) {
                    return avfilter_link(mFilterContext, getAvailableOutput(), f->getAVFilter(), f->getAvailableInput());
                }
                return -1;
            }
            
            
 
            MediaFilter::MediaFilter() {
                //VS_LOG_WARN("type of filter %s %p", typeid (this).name(), this);
                mFilter = NULL;
                mFilterContext = NULL;
                ready = false;
            }
 
            MediaFilter::~MediaFilter() {
                //mFilterContext freed by FilterChain
                mFilterContext = NULL;
                mFilter = NULL;
            }
 
 
        }
    }
}