/*
 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

/*
 * testG711.cpp : Defines the entry point for the console application.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* include API */
#include "g711_interface.h"

/* Runtime statistics */
#include <time.h>
#define CLOCKS_PER_SEC_G711  1000


/* function for reading audio data from PCM file */
int readframe(WebRtc_Word16 *data, FILE *inp, int length) {

    short k, rlen, status = 0;

    rlen = (short)fread(data, sizeof(WebRtc_Word16), length, inp);
    if (rlen < length) {
        for (k = rlen; k < length; k++)
            data[k] = 0;
        status = 1;
    }

    return status;
}

int main(int argc, char* argv[])
{
    char inname[80], outname[40], bitname[40];
    FILE *inp, *outp, *bitp = NULL;
    int framecnt, endfile;

    WebRtc_Word16 framelength = 80;

    int err;

    /* Runtime statistics */
    double starttime;
    double runtime;
    double length_file;

    WebRtc_Word16 stream_len = 0;
    WebRtc_Word16 shortdata[480];
    WebRtc_Word16 decoded[480];
    WebRtc_Word16 streamdata[500];
    WebRtc_Word16    speechType[1];
    char law[2];
    char versionNumber[40];

    /* handling wrong input arguments in the command line */
    if ((argc!=5) && (argc!=6))  {
        printf("\n\nWrong number of arguments or flag values.\n\n");

        printf("\n");
        printf("\nG.711 test application\n\n");
        printf("Usage:\n\n");
        printf("./testG711.exe framelength law infile outfile \n\n");
        printf("framelength: Framelength in samples.\n");
        printf("law        : Coding law, A och u.\n");
        printf("infile     : Normal speech input file\n");
        printf("outfile    : Speech output file\n\n");
        printf("outbits    : Output bitstream file [optional]\n\n");
        exit(0);

    }

    /* Get version and print */
    WebRtcG711_Version(versionNumber, 40);

    printf("-----------------------------------\n");
    printf("G.711 version: %s\n\n", versionNumber);
    /* Get frame length */
    framelength = atoi(argv[1]);
    
    /* Get compression law */
    strcpy(law, argv[2]);

    /* Get Input and Output files */
    sscanf(argv[3], "%s", inname);
    sscanf(argv[4], "%s", outname);
    if (argc==6) {
        sscanf(argv[5], "%s", bitname);
        if ((bitp = fopen(bitname,"wb")) == NULL) {
            printf("  G.711: Cannot read file %s.\n", bitname);
            exit(1);
        }
    }

    if ((inp = fopen(inname,"rb")) == NULL) {
        printf("  G.711: Cannot read file %s.\n", inname);
        exit(1);
    }
    if ((outp = fopen(outname,"wb")) == NULL) {
        printf("  G.711: Cannot write file %s.\n", outname);
        exit(1);
    }
    printf("\nInput:  %s\nOutput: %s\n", inname, outname);
    if (argc==6) {
        printf("\nBitfile:  %s\n", bitname);
    }

    starttime = clock()/(double)CLOCKS_PER_SEC_G711; /* Runtime statistics */

     /* Initialize encoder and decoder */
    framecnt= 0;
    endfile    = 0;
    while (endfile == 0) {
        framecnt++;
        /* Read speech block */
        endfile = readframe(shortdata, inp, framelength);

        /* G.711 encoding */
        if (!strcmp(law,"A")) {
            /* A-law encoding */
            stream_len = WebRtcG711_EncodeA(NULL, shortdata, framelength, streamdata);
            if (argc==6){
                /* Write bits to file */
                fwrite(streamdata,sizeof(unsigned char),stream_len,bitp);
            }
            err = WebRtcG711_DecodeA(NULL, streamdata, stream_len, decoded, speechType);
        } else if (!strcmp(law,"u")){
            /* u-law encoding */
            stream_len = WebRtcG711_EncodeU(NULL, shortdata, framelength, streamdata);
            if (argc==6){
                /* Write bits to file */
                fwrite(streamdata,sizeof(unsigned char),stream_len,bitp);
            }
            err = WebRtcG711_DecodeU(NULL, streamdata, stream_len, decoded, speechType);
        } else {
            printf("Wrong law mode\n");
            exit (1);
        }
        if (stream_len < 0 || err < 0) {
            /* exit if returned with error */
            printf("Error in encoder/decoder\n");
        } else {
            /* Write coded speech to file */
            fwrite(decoded,sizeof(short),framelength,outp);
        }
    }


    runtime = (double)(clock()/(double)CLOCKS_PER_SEC_G711-starttime);
    length_file = ((double)framecnt*(double)framelength/8000);
    printf("\n\nLength of speech file: %.1f s\n", length_file);
    printf("Time to run G.711:      %.2f s (%.2f %% of realtime)\n\n", runtime, (100*runtime/length_file));
    printf("---------------------END----------------------\n");

    fclose(inp);
    fclose(outp);


    return 0;
}