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Add AvAudioPhaseMeter application
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3 files changed

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‎app/CMakeLists.txt

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# C++ apps
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add_subdirectory(avAudioPhaseMeter)
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add_subdirectory(avInfo)
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add_subdirectory(avMeta)
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add_subdirectory(avPlayer)

‎app/avAudioPhaseMeter/CMakeLists.txt

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### cpp/avProcessor
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# Load custom cmake utilities
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set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
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include(AvTranscoderMacros)
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# Build app
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add_executable(avaudiophasemeter avAudioPhaseMeter.cpp)
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set_target_properties(avaudiophasemeter PROPERTIES VERSION ${AVTRANSCODER_VERSION})
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target_link_libraries(avaudiophasemeter avtranscoder-shared)
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# Install app
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if(WIN32)
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set(BINARY_FILES "${CMAKE_CURRENT_BINARY_DIR}/avaudiophasemeter.exe")
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else()
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set(BINARY_FILES "${CMAKE_CURRENT_BINARY_DIR}/avaudiophasemeter" "${CMAKE_CURRENT_BINARY_DIR}/avaudiophasemeter-${AVTRANSCODER_VERSION}")
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endif()
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install(
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FILES ${BINARY_FILES}
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PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE
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DESTINATION "bin/"
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OPTIONAL
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)

‎app/avAudioPhaseMeter/avAudioPhaseMeter.cpp

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#include <AvTranscoder/transcoder/Transcoder.hpp>
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#include <AvTranscoder/file/OutputFile.hpp>
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#include <AvTranscoder/progress/ConsoleProgress.hpp>
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#include <iostream>
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#include <iomanip>
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#include <vector>
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#include <fstream>
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#include <sstream>
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#include <cstdlib>
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std::vector<avtranscoder::InputStreamDesc> parseConfigFile(const std::string& configFilename)
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{
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std::vector<avtranscoder::InputStreamDesc> result;
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std::ifstream configFile(configFilename.c_str(), std::ifstream::in);
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std::string line;
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size_t countLines = 0;
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while(std::getline(configFile, line))
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{
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if(++countLines > 2)
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throw std::runtime_error("Audio phase analysis can only be done on a stereo pair, i.e. two channels (see usage).");
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std::istringstream is_line(line);
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std::string filename;
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if(std::getline(is_line, filename, '='))
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{
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std::string stream;
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std::getline(is_line, stream);
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std::stringstream ss(stream);
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size_t streamIndex = 0;
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char separator;
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int channelIndex = -1;
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ss >> streamIndex;
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ss >> separator;
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if(separator == '.')
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ss >> channelIndex;
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bool newInputDescAdded = false;
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// if we already have an input description with the same filename/streamIndex, add only the new channelIndex
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for(std::vector<avtranscoder::InputStreamDesc>::iterator it = result.begin(); it != result.end(); ++it)
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{
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if(it->_filename == filename && it->_streamIndex == streamIndex)
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{
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it->_channelIndexArray.push_back(channelIndex);
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newInputDescAdded = true;
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break;
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}
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}
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if(! newInputDescAdded)
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result.push_back(avtranscoder::InputStreamDesc(filename, streamIndex, channelIndex));
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}
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}
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configFile.close();
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return result;
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}
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void displayUsage(const std::string& program)
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{
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std::cout << "Usage: " << program << " CONFIG OUTPUT [OPTIONS]" << std::endl << std::endl;
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std::cout << "\tCONFIG: input configuration file" << std::endl;
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std::cout << "\t\tEach line represents one audio stream analysed." << std::endl;
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std::cout << "\t\tPattern of each line is:" << std::endl;
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std::cout << "\t\t[inputFile]=STREAM_INDEX.CHANNEL_INDEX" << std::endl;
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std::cout << "\t\tWARNING: audio phase analyser only support stereo layout, i.e. two lines in this configuration." << std::endl << std::endl;
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std::cout << "\tOUTPUT: metadata output file" << std::endl;
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std::cout << "\t\tPattern for each frame is:" << std::endl;
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std::cout << "\t\t `frame:[FRAME_ID] pts:[PTS] pts_time:[PTS_TIME]" << std::endl;
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std::cout << "\t\t lavfi.aphasemeter.phase=[PHASE_VALUE]`" << std::endl << std::endl;
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std::cout << "\tOPTIONS:" << std::endl;
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std::cout << "\t\t--info set log level to AV_LOG_INFO" << std::endl;
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std::cout << "\t\t--debug set log level to AV_LOG_DEBUG" << std::endl;
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std::cout << "\t\t--help display this help" << std::endl << std::endl;
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}
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int main(int argc, char** argv)
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{
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// Preload FFmpeg context
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avtranscoder::preloadCodecsAndFormats();
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avtranscoder::Logger::setLogLevel(AV_LOG_QUIET);
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if(argc < 3) {
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displayUsage(argv[0]);
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}
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// List command line arguments
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std::vector<std::string> arguments;
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for(int argument = 1; argument < argc; ++argument)
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{
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arguments.push_back(argv[argument]);
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}
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for(size_t argument = 0; argument < arguments.size(); ++argument)
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{
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if(arguments.at(argument) == "--help")
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{
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displayUsage(argv[0]);
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return 0;
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}
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else if(arguments.at(argument) == "--debug")
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{
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avtranscoder::Logger::setLogLevel(AV_LOG_DEBUG);
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}
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else if(arguments.at(argument) == "--info")
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{
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avtranscoder::Logger::setLogLevel(AV_LOG_INFO);
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}
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}
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try
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{
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std::string configFilePath(arguments.at(0));
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std::string outputFilePath(arguments.at(1));
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std::vector<avtranscoder::InputStreamDesc> inputStreamsToAnalyse = parseConfigFile(configFilePath);
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avtranscoder::OutputFile outputFile(outputFilePath, "null"); // the output file will be overwritten by the extracted metadata
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avtranscoder::Transcoder transcoder(outputFile);
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transcoder.setProcessMethod(avtranscoder::eProcessMethodBasedOnStream, 0);
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transcoder.addStream(inputStreamsToAnalyse);
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avtranscoder::StreamTranscoder& streamTranscoder = transcoder.getStreamTranscoder(0);
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avtranscoder::FilterGraph* filterGraph = streamTranscoder.getFilterGraph();
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filterGraph->addFilter("aphasemeter", "video=0");
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filterGraph->addFilter("ametadata", "mode=print:file=" + outputFilePath);
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avtranscoder::ConsoleProgress progress;
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transcoder.process(progress);
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}
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catch(std::exception& e)
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{
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std::cerr << "ERROR: during process, an error occured: " << e.what() << std::endl;
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}
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catch(...)
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{
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std::cerr << "ERROR: during process, an unknown error occured" << std::endl;
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}
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}

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