//this seems to be obsolete!!!!!!!!!!!!!!!!!




bool Render_context::load_audio(string &filename){
	//load audio into memory and create thumbnail
	
	av_register_all();
	avcodec_register_all();
    //av_register_all();
    //av_ini

    AVFormatContext* container=avformat_alloc_context();
    if(avformat_open_input(&container,filename.c_str(),NULL,NULL)<0){
	cerr << "Could not open file" << endl;
	return false;
    }

//header in avformat.h definition in utils.c in ffmpeg/libavformat
//int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
//set input or dictionary??
    
    
    if(av_find_stream_info(container)<0){
       cerr << "Could not find file info"<< endl;
	return false;
    }
    
    //added to try and locate missing audio streams
    //container->flags |= AVFMT_FLAG_NONBLOCK;
    //
    cerr << "found " << container->nb_streams << " streams" << endl;
    av_dump_format(container,0,filename.c_str(),false);
    cerr << "found " << container->nb_streams << " streams" << endl;
    
    //typedef struct AVFormatContext {
    // unsigned int nb_streams;
    //AVStream **streams;
    /**
     * A list of all streams in the file. New streams are created with
     * avformat_new_stream().
     *
     * decoding: streams are created by libavformat in avformat_open_input().
     * If AVFMTCTX_NOHEADER is set in ctx_flags, thandroid on linux i386en new streams may also
     * appear in av_read_frame().
     * encoding: streams are created by the user before avformat_write_header().
     */
    
    int stream_id=-1;
    int i;
    for(i=0;i<container->nb_streams;i++){
	cerr << "stream " << i << ": codec type " << container->streams[i]->codec->codec_type << endl;
        if(container->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO){
            stream_id=i;
            break;
        }
    }
    if(stream_id==-1){
        cerr << "Could not find Audio Stream"<< endl;
	return false;
    }

    AVDictionary *metadata=container->metadata;

    AVCodecContext *ctx=container->streams[stream_id]->codec;
    AVCodec *codec=avcodec_find_decoder(ctx->codec_id);

    if(codec==NULL){
        cerr <<"cannot find codec!"<< endl;
	return false;
    }

    if(avcodec_open(ctx,codec)<0){
        cerr <<"Codec cannot be found"<< endl;
	return false;
    }

    //ctx=avcodec_alloc_context3(codec);

    AVSampleFormat sfmt=ctx->sample_fmt;
    if(sfmt==AV_SAMPLE_FMT_U8){
        printf("U8\n");

        //sformat.bits=8;
    }else if(sfmt==AV_SAMPLE_FMT_S16){
        printf("S16\n");
        //sformat.bits=16;
    }else if(sfmt==AV_SAMPLE_FMT_S32){
        printf("S32\n");
        //sformat.bits=32;
    }

   // sformat.channels=ctx->channels;
  //  sformat.rate=ctx->sample_rate;
 //   sformat.byte_format=AO_FMT_NATIVE;
//    sformat.matrix=0;



    AVPacket packet;
    av_init_packet(&packet);

    AVFrame *frame=avcodec_alloc_frame();



    int buffer_size=AVCODEC_MAX_AUDIO_FRAME_SIZE+ FF_INPUT_BUFFER_PADDING_SIZE;;
    uint8_t buffer[buffer_size];
    packet.data=buffer;
    packet.size =buffer_size;



    int len;
    int frameFinished=0;
    while(av_read_frame(container,&packet)>=0)
    {

        if(packet.stream_index==stream_id){
            //printf("Audio Frame read  \n");
            int len=avcodec_decode_audio4(ctx,frame,&frameFinished,&packet);
            //frame->
            if(frameFinished){
                //printf("Finished reading Frame len : %d , nb_samples:%d buffer_size:%d line size: %d \n",len,frame->nb_samples,buffer_size,frame->linesize[0]);
                //ao_play(adevice, (char*)frame->extended_data[0],frame->linesize[0] );
		
		//DO SOMETHING WITH THE DATA HERE
            }else{
                //printf("Not Finished\n");
            }

        }else {
            cerr << "Avcodec found some other packet possibly Video\n";
        }


    }

    av_close_input_file(container);
    
	return true;
}