File: stat.c

package info (click to toggle)
sox 12.16-6
  • links: PTS
  • area: main
  • in suites: potato
  • size: 1,180 kB
  • ctags: 1,466
  • sloc: ansic: 16,658; sh: 2,071; makefile: 126
file content (211 lines) | stat: -rw-r--r-- 5,046 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211

/*
 * July 5, 1991
 * Copyright 1991 Lance Norskog And Sundry Contributors
 * This source code is freely redistributable and may be used for
 * any purpose.  This copyright notice must be maintained. 
 * Lance Norskog And Sundry Contributors are not responsible for 
 * the consequences of using this software.
 */

/*
 * Sound Tools statistics "effect" file.
 *
 * Build various statistics on file and print them.
 * No output.
 */

#include "st.h"

/* Private data for STAT effect */
typedef struct statstuff {
	LONG	min, max, mean;		/* amplitudes */
	LONG	dmin, dmax, dmean;	/* deltas */
	LONG	last;			/* previous sample */
	int	first;
	int	total;
	int	volume;
        ULONG   bin[4];
} *stat_t;

#define	abs(val)	(((val) < 0) ? -(val) : (val))

/*
 * Process options
 */
void stat_getopts(effp, n, argv) 
eff_t effp;
int n;
char **argv;
{
	stat_t stat = (stat_t) effp->priv;

	stat->volume = 0;
	if (n)
	{
		if (!(strcmp(argv[0], "-v")))
			stat->volume = 1;
		else if (!(strcmp(argv[0], "debug")))
			stat->volume = 2;
		else
			fail("Summary effect only allows debug or -v as options.");
	}
}

/*
 * Prepare processing.
 */
void stat_start(effp)
eff_t effp;
{
	stat_t stat = (stat_t) effp->priv;
        int i;

	stat->min = stat->dmin = 0x7fffffffL;
	stat->max = stat->dmax = 0x80000000L;
	stat->first = 1;

	for (i = 0; i < 4; i++)
		stat->bin[i] = 0;

}

/*
 * Processed signed long samples from ibuf to obuf.
 * Return number of samples processed.
 */

void stat_flow(effp, ibuf, obuf, isamp, osamp)
eff_t effp;
LONG *ibuf, *obuf;
int *isamp, *osamp;
{
	stat_t stat = (stat_t) effp->priv;
	int len, done;
	LONG samp, delta;
	short count;

	count = 0;
	len = ((*isamp > *osamp) ? *osamp : *isamp);
	for(done = 0; done < len; done++) {
		/* work in absolute levels for both sample and delta */
		samp = *ibuf++;
	        *obuf++ = samp;

		if (stat->volume == 2)
		{
#ifdef __alpha__
		    fprintf(stderr,"%8x ",samp);
#else
		    fprintf(stderr,"%8lx ",samp);
#endif
		    if (count++ == 5)
		    {
		        fprintf(stderr,"\n");
			count = 0;
		    }
		}

                stat->bin[RIGHT(samp,30)+2]++;

		samp = abs(samp);
		if (samp < stat->min)
			stat->min = samp;
		if (samp > stat->max)
			stat->max = samp;
		if (stat->first) {
			stat->first = 0;
			stat->mean = samp;
			stat->dmean = 0;
		} else  {
			/* overflow avoidance */
			if ((stat->mean > 0x20000000L) || (samp > 0x20000000L))
				stat->mean = stat->mean/2 + samp/2;
			else
				stat->mean = (stat->mean + samp)/2;

			delta = abs(samp - stat->last);
			if (delta < stat->dmin)
				stat->dmin = delta;
			if (delta > stat->dmax)
				stat->dmax = delta;
			/* overflow avoidance */
			if ((delta > 0x20000000L) || (stat->dmean > 0x20000000L))
				stat->dmean = stat->dmean/2 + delta/2;
			else
				stat->dmean = (stat->dmean + delta)/2;
		}
		stat->last = samp;
	}
	/* Process all samples */
}

/*
 * Do anything required when you stop reading samples.  
 * Don't close input file! 
 */
void
stat_stop(effp)
eff_t effp;
{
	stat_t stat = (stat_t) effp->priv;
	double amp, range;
        float x;

	stat->min   = RIGHT(stat->min, 16);
	stat->max   = RIGHT(stat->max, 16);
	stat->mean  = RIGHT(stat->mean, 16);
	stat->dmin  = RIGHT(stat->dmin, 16);
	stat->dmax  = RIGHT(stat->dmax, 16);
	stat->dmean = RIGHT(stat->dmean, 16);

	range = 32767.0;

	amp = - stat->min;
	if (amp < stat->max)
		amp = stat->max;
	/* Just print the volume adjustment */
	if (stat->volume == 1) {
		fprintf(stderr, "%.3f\n", 32767.0/amp);
		return;
	}
	else if (stat->volume == 2) {
		fprintf(stderr, "\n");
	}
	/* print them out */
	fprintf(stderr, "Maximum amplitude: %.3f\n", stat->max/range);
	fprintf(stderr, "Minimum amplitude: %.3f\n", stat->min/range);
	fprintf(stderr, "Mean    amplitude: %.3f\n", stat->mean/range);

	fprintf(stderr, "Maximum delta:     %.3f\n", stat->dmax/range);
	fprintf(stderr, "Minimum delta:     %.3f\n", stat->dmin/range);
	fprintf(stderr, "Mean    delta:     %.3f\n", stat->dmean/range);

	fprintf(stderr, "Volume adjustment: %.3f\n", 32767.0/amp);

        if (stat->bin[2] == 0 && stat->bin[3] == 0)
                fprintf(stderr, "\nProbably text, not sound\n");
        else {

                x = (float)(stat->bin[0] + stat->bin[3]) / (float)(stat->bin[1] + stat->bin[2]);

                if (x >= 3.0)                        /* use opposite style */
                        if (effp->ininfo.style == UNSIGNED)
                                printf ("\nTry: -t raw -b -s \n");
                        else
                                printf ("\nTry: -t raw -b -u \n");

                else if (x <= 1.0/3.0);              /* correctly decoded */

                else if (x >= 0.5 && x <= 2.0)       /* use ULAW */
                        if (effp->ininfo.style == ULAW)
                                printf ("\nTry: -t raw -b -u \n");
                        else
                                printf ("\nTry: -t raw -b -U \n");

                else    
                        fprintf (stderr, "\nCan't guess the type\n");
        }

}