CodecMP3MAD.h

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#pragma once
 
#define MINIMP3_IMPLEMENTATION
#define MINIMP3_NO_STDIO
#define LOGGING_ACTIVE true
 
#include "Stream.h"
#include "AudioTools/AudioCodecs/AudioCodecsBase.h"
#include "MP3DecoderMAD.h"
 
 
namespace audio_tools {
 
// forward audio changes
static AudioInfoSupport *audioChangeMAD=nullptr;
 
class MP3DecoderMAD : public AudioDecoder  {
    public:
 
        MP3DecoderMAD(){
            TRACED();
            mad = new libmad::MP3DecoderMAD();
        }
 
        MP3DecoderMAD(libmad::MP3DataCallback dataCallback, libmad::MP3InfoCallback infoCB=nullptr){
            TRACED();
            mad = new libmad::MP3DecoderMAD(dataCallback, infoCB);
        }
 
        MP3DecoderMAD(Print &mad_output_streamput, libmad::MP3InfoCallback infoCB = nullptr){
            TRACED();
            mad = new libmad::MP3DecoderMAD(mad_output_streamput, infoCB);
        }
 
        ~MP3DecoderMAD(){
            TRACED();
            delete mad;
        }
 
        const char *mime() override { return "audio/mpeg"; }
 
        void setOutput(Print &out) override {
            TRACED();
            mad->setOutput(out);
        }
 
        void setAudioDataCallback(libmad::MP3DataCallback cb){
            TRACED();
            mad->setDataCallback(cb);
        }
 
        void setInfoCallback(libmad::MP3InfoCallback cb){
            TRACED();
            mad->setInfoCallback(cb);
        }
 
        bool begin() override {
            TRACED();
            mad->begin();
            return true;
        }
 
        void end() override{
            TRACED();
            mad->end();
        }
 
        libmad::MadAudioInfo audioInfoEx(){
            TRACED();
            return mad->audioInfo();
        }
 
        AudioInfo audioInfo() override {
            TRACED();
            libmad::MadAudioInfo info = audioInfoEx();
            AudioInfo base;
            base.channels = info.channels;
            base.sample_rate = info.sample_rate;
            base.bits_per_sample = info.bits_per_sample; 
            return base;
        }
 
        size_t write(const uint8_t *data, size_t len) override {
            TRACED();
            return mad->write(data,len);
        }
 
        size_t write(void *data, size_t len){
            TRACED();
            return mad->write(data,len);
        }
 
        operator bool() override{
            return (bool)*mad;
        }
 
        libmad::MP3DecoderMAD *driver() {
            return mad;
        }
 
        static void audioChangeCallback(libmad::MadAudioInfo &info){
            if (audioChangeMAD!=nullptr){
                TRACED();
                AudioInfo base;
                base.channels = info.channels;
                base.sample_rate = info.sample_rate;
                base.bits_per_sample = info.bits_per_sample;
                // notify audio change
                audioChangeMAD->setAudioInfo(base);
            }
        }
 
        virtual void addNotifyAudioChange(AudioInfoSupport &bi) override {
            TRACED();
            audioChangeMAD = &bi;
            // register audio change handler
            mad->setInfoCallback(audioChangeCallback);
        }
 
    protected:
        libmad::MP3DecoderMAD *mad;
 
};
 
} // namespace