musicin.c

MPEG 2的音频编码软件。喜欢多媒体的开发人员可以看看。

		    fr_ps->config = 320;
		    printf (">>> Using default 3/2 configuration.\n"); 
		    break;
	    }
	}
	else if (tot_channels - info->lfe == 4) 
	{
	    fr_ps->stereomc = 2;
	    fr_ps->stereoaug = 0;
	    printf ("Which configuration do you want to use?\n");
	    printf ("Available: 3/1 (<1>), 2/2 (2), 2/0 + 2/0 (3): ");
	    gets (configuration);
	    switch (*configuration)
    	    {
	    case '1': 
		    info->center = 1; 
		    info->surround = 1; 
		    fr_ps->config = 310;
		    fr_ps->lfe_pos = 3;
		    printf (">>> Using 3/1 configuration.\n"); 
		    break;
	    case '2': 
		    info->center = 0; 
		    info->surround = 2; 
		    fr_ps->config = 220;
		    fr_ps->lfe_pos = 2;
		    printf (">>> Using 2/2 configuration.\n"); 
		    break;
	    case '3': 
		    info->center = 0; 
		    info->surround = 3; 
		    fr_ps->config = 202;
		    fr_ps->lfe_pos = 2;
		    printf (">>> Using 2/0 + 2/0 configuration.\n"); 
		    break;
	    default:  
		    info->center = 1; 
		    info->surround = 1; 
		    fr_ps->config = 310;
		    fr_ps->lfe_pos = 3;
		    printf (">>> Using default 3/1 configuration.\n"); 
		    break;
	    }
	}
	else if (tot_channels - info->lfe == 3) 
	{
	    fr_ps->stereoaug = 0;
	    printf ("Which configuration do you want to use?\n");
	    printf ("Available: 3/0 (<1>), 2/1 (2), 1/0 + 2/0 (3): ");
	    gets (configuration);
	    switch (*configuration)
    	    {
	    case '1': 
		    info->center = 1; 
		    info->surround = 0; 
		    fr_ps->config = 300;
		    fr_ps->stereomc = 1;
		    fr_ps->lfe_pos = 3;
		    printf (">>> Using 3/0 configuration.\n"); 
		    break;
	    case '2': 
		    info->center = 0; 
		    info->surround = 1; 
		    fr_ps->config = 210;
		    fr_ps->stereomc = 1;
		    fr_ps->lfe_pos = 2;
		    printf (">>> Using 2/1 configuration.\n"); 
		    break;
	    case '3': 
		    info->center = 0; 
		    info->surround = 3; 
		    fr_ps->config = 102;
		    fr_ps->stereomc = 2;
		    fr_ps->lfe_pos = 1;
		    printf (">>> Using 1/0 + 2/0 configuration.\n"); 
		    break;
	    default:  
		    info->center = 1; 
		    info->surround = 0; 
		    fr_ps->config = 300;
		    fr_ps->stereomc = 1;
		    fr_ps->lfe_pos = 3;
		    printf (">>> Using default 3/0 configuration.\n"); 
		    break;
	    }
	}
	else if (tot_channels - info->lfe == 2) 
	{
	    fr_ps->config = 200;
	    fr_ps->stereomc = 0;
	    fr_ps->stereoaug = 0;
	    fr_ps->lfe_pos = 2;
	}
	else if (tot_channels - info->lfe == 1) 
	{
	    if (info->lfe)
	    {
		printf ("single channel plus LFE not supported.\n");
		exit (1);
	    }
	    fr_ps->config = 100;
	    fr_ps->stereomc = 0;
	    fr_ps->stereoaug = 0;
	}
	else
	{
	    printf ("Channels = %d not supported.\n", tot_channels);
	    exit (1);
	}

	aiff_check (original_file_name, pcm_aiff_data);

/* 21/03/1995 JMZ Multimode */
/**********************************************************/


        info->sampling_frequency = SmpFrqIndex ((long) pcm_aiff_data->sampleRate);
        printf (">>> %.f Hz sampling frequency selected\n", pcm_aiff_data->sampleRate);

        /* Determine number of samples in sound file */
        *num_samples = pcm_aiff_data->numChannels * pcm_aiff_data->numSampleFrames;

	if (info->multiling_ch > 0)
	{
	    switch (SmpFrqIndex ((long) pcm_aiff_data_ml->sampleRate) - info->sampling_frequency)
	    {
	    case 16 : printf ("MultiLingual is LSF coded.\n");
		      info->multiling_fs = 1;
		      break;
	    case  0 : printf ("MultiLingual sample rate equals that of Audio.\n");
		      info->multiling_fs = 0;
		      break;
	    default : printf ("***WARNING: MultiLingual sample rate does not equal (half) mc sample rate.\n");
	    	      printf ("            No MultiLingual coding!!!\n");
		      info->multiling_ch = 0;
		      break;
	    } /*switch*/
	} /*if (ml_ch>0)*/
    }
    else
    {    /* Not using Audio IFF sound file headers. */
	printf("no multichannel coding!!\n");
	fr_ps->stereomc = 0;
	fr_ps->stereoaug = 0;
	info->multiling_ch = 0;
        printf ("What is the sampling frequency? <48000>[Hz]: ");
        gets (t);
        i = atol(t);
        switch (i)
	{
        case 48000 : info->sampling_frequency = 1;
	             printf (">>> %ld Hz sampling freq selected\n", i);
		     break;
        case 44100 : info->sampling_frequency = 0;
		     printf (">>> %ld Hz sampling freq selected\n", i);
		     break;
        case 32000 : info->sampling_frequency = 2;
		     printf (">>> %ld Hz sampling freq selected\n", i);
		     break;
        default:     info->sampling_frequency = 1;
		     printf (">>> Default 48 kHz samp freq selected\n");
        }
 
        if (fseek (musicin, 0, SEEK_SET) != 0)
	{
          printf ("Could not seek to PCM sound data in \"%s\".\n",
                  original_file_name);
          exit (1);
        }
 
        /* Declare sound file to have "infinite" number of samples. */
        *num_samples = MAX_U_32_NUM;
    }

    printf ("Which layer do you want to use?\n");
    printf ("Available: Layer (1), Layer (<2>): ");
    gets (t);
    switch (*t)
    {
    case '1': info->lay = 1; printf (">>> Using Layer %s\n", t); break;
    case '2': info->lay = 2; printf (">>> Using Layer %s\n", t); break;
    default : info->lay = 2; printf (">>> Using default Layer 2\n"); break;
    }

    printf ("Which mode do you want for the two front channels?\n");
    printf ("Available: (<s>)tereo, (j)oint stereo, ");
    printf ("(d)ual channel, s(i)ngle Channel, n(o)ne: ");
    gets (t);
    if (fr_ps->config < 200) /* compatible is mono */
    {
	info->mode = MPG_MD_MONO;
	info->mode_ext = 0;
	printf (">>> Using default mono mode\n");
    }
    else
	switch (*t)
	{
	case 's':
	case 'S': info->mode = MPG_MD_STEREO; info->mode_ext = 0;
		  printf (">>> Using mode %s\n",t);
		  break;
	case 'j':
	case 'J': info->mode = MPG_MD_JOINT_STEREO;
		  printf (">>> Using mode %s\n",t);
		  break;
	case 'd':
	case 'D': info->mode = MPG_MD_DUAL_CHANNEL; info->mode_ext = 0;
		  printf (">>> Using mode %s\n",t);
		  break;
	case 'i':
	case 'I': info->mode = MPG_MD_MONO; info->mode_ext = 0;
		  printf (">>> Using mode %s\n",t);
		  break;
	case 'o':
	case 'O': info->mode = MPG_MD_NONE; info->mode_ext = 0;
		  printf (">>> Using mode %s\n",t);
		  break;
	default:  info->mode = MPG_MD_STEREO; info->mode_ext = 0;
		  printf (">>> Using default stereo mode\n");
		  break;
	}

    *psy = DFLT_PSY;

    if (info->mode == MPG_MD_MONO)
	max_rate_index = 10;
    else
	max_rate_index = 14;
/*    max_rate_index = 6; */ /* 48 kHz => 96 kbps for multiple table testing */ 
    max_rate = bitrate[info->lay-1][max_rate_index];
    printf ("What is the total bitrate? <%u>[kbps]: ", DFLT_BRT);
    gets (t);
    i = atol (t);
    if (i == 0) i = -10;
    j = 0;
    while (j <= max_rate_index) 
    {
	if (bitrate[info->lay-1][j] == (int) i)
	    break;
	j++;
    }
    if (j > max_rate_index) 
    {
        if (i < max_rate)
        {
	    if (DFLT_BRT <= max_rate)
	    {
	    	i = DFLT_BRT;
		printf (">>> Using default %u kbps\n", DFLT_BRT);
	    }
	    else
	    {
	       	i = max_rate;
		printf (">>> Using max. bitrate %u kbps\n", max_rate);
	    }
	    for (j = 0; j < 15; j++)
		if (bitrate[info->lay-1][j] == (int) i) 
		{
		    info->bitrate_index = j;
		    break;
		}
	}
	else
	{
	    info->ext_bit_stream_present = 1;
	    *bit_rate = i;
	    if (DFLT_BRT <= max_rate)
	    	i = DFLT_BRT;
	    else
	       	i = max_rate;
	    for (j = 0; j < 15; j++)
		if (bitrate[info->lay-1][j] == (int) i) 
		{
		    info->bitrate_index = j;
		    break;
		}
	    info->ext_length = ((*bit_rate - i) * 144) / s_freq[info->sampling_frequency];
	    printf (">>> Bitrate = %d kbps\n", *bit_rate);
	}			   
    }
    else
    {
        info->bitrate_index = j;
        printf (">>> Bitrate = %d kbps\n", bitrate[info->lay-1][j]);
    }

    printf ("What type of de-emphasis should the decoder use?\n");
    printf ("Available: (<n>)one, (5)0/15 microseconds, (c)citt j.17: ");
    gets (t);
    if (*t != 'n' && *t != '5' && *t != 'c')
    {
        printf (">>> Using default no de-emphasis\n");
        info->emphasis = 0;
    }
    else
    {
        if (*t == 'n')      info->emphasis = 0;
        else if (*t == '5') info->emphasis = 1;
        else if (*t == 'c') info->emphasis = 3;
        printf (">>> Using de-emphasis %c\n", *t);
    }
 
/*  Start 2. Part changes for CD Ver 3.2; jsp; 22-Aug-1991 */
 
    printf ("Do you want to set the private bit? (y/<n>): ");
    gets (t);
    if (*t == 'y' || *t == 'Y') info->extension = 1;
    else                        info->extension = 0;
    if (info->extension) printf (">>> Private bit set\n");
    else                 printf (">>> Private bit not set\n");
 
/*  End changes for CD Ver 3.2; jsp; 22-Aug-1991 */
	
    printf ("Do you want error protection? (y/<n>): ");
    gets (t);
    if (*t == 'y' || *t == 'Y') info->error_protection = TRUE;
    else                        info->error_protection = FALSE;
    if (info->error_protection) printf (">>> Error protection used\n");
    else			printf (">>> Error protection not used\n");
	

    printf ("Is the material copyrighted? (y/<n>): ");
    gets (t);
    if (*t == 'y' || *t == 'Y') info->copyright = 1;
    else                        info->copyright = 0;
    if (info->copyright) printf (">>> Copyrighted material\n");
    else                 printf (">>> Material not copyrighted\n");
 
    printf ("Is this the original? (y/<n>): ");
    gets (t);
    if (*t == 'y' || *t == 'Y') info->original = 1;
    else                        info->original = 0;
    if (info->original) printf (">>> Original material\n");
    else	        printf (">>> Material not original\n");
    
    /* Option for multichannel for matricing, 7/12/93,SR*/
    if (*aiff == 1)
    {
        printf ("which kind of matrix do you want(<(-3, -3) = 0>;(-xx, -3) = 1;");
	printf (" (-oo, -3) = 2; (-oo, -oo) = 3)  ");
	gets (t);
	if (strcmp (t,"") == 0) info->matrix = 0;
	else			info->matrix = atoi (t);
	printf ("The matrix %d is chosen\n", info->matrix);
	*mat_mode = info->matrix;

#ifdef Augmentation_7ch
	if (fr_ps->stereoaug == 2)  /* 7.1 channel mode */
	{
	    printf ("which kind of aug matrix do you want? (<0>; 1; 3) ");
	    gets (t);
	    if (strcmp (t, "") == 0) info->aug_mtx_proc = 0;
	    else		     info->aug_mtx_proc = atoi (t);
	    printf ("The aug matrix %d is chosen\n", info->aug_mtx_proc);
	    *aug_mat_mode = info->aug_mtx_proc;
	}
#endif

	printf ("Do you want to have Channel-switching?(<y>/n) ");
	gets (t);
	if (*t == 'y' || *t == 'Y')
	    *cha_sw = *aug_cha_sw = 1;

	if (*cha_sw == 0 || info->matrix == 3)
	{
	    *cha_sw = 0;
	    printf ("Channel-switching is not used!\n");
	    printf ("Which mode of Channel-switching do you want? (not used) ");
	    gets (t);
	    printf("CHA mode: %d\n", *cha_sw);
	}
	else
	{
	    *cha_sw = 1;
	    printf ("Channel-switching is used\n");	 
	    do
	    {
		printf ("Which mode of Channel-switching do you want? (-2 ... 7) ");
		gets (t);
		*cha_sw = atoi (t);
		printf ("CHA mode: %d\n", *cha_sw);
		if (fr_ps->config == 320)
		    bool = *cha_sw > 7;
		else if (fr_ps->config == 310 && info->matrix == 2)
		    bool = *cha_sw > 5;
		else if (fr_ps->config == 310)
		    bool = *cha_sw > 4;
		else if (fr_ps->config == 220)
		    bool = *cha_sw > 3;
		else if (fr_ps->config == 300 || fr_ps->config == 302 || fr_ps->config == 210)