[gui]: Use the new -p option for the default stat command.

[paraslash.git] / amp_filter.c

diff --git a/amp_filter.c b/amp_filter.c
index f6e22059e3f2432a2c1c69751415e789569b4fe7..e180db437c6a26fe8c978fefccdd51841cd97fd0 100644 (file)
--- a/amp_filter.c
+++ b/amp_filter.c
@@ -1,11 +1,13 @@
 /*
- * Copyright (C) 2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2009 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file amp_filter.c Paraslash's amplify filter. */
 
+#include <regex.h>
+
 #include "para.h"
 #include "amp_filter.cmdline.h"
 #include "list.h"
@@ -30,19 +32,29 @@ struct private_amp_data {
 
 static ssize_t amp_convert(char *inbuf, size_t inbuf_len, struct filter_node *fn)
 {
-       size_t i, length = PARA_MIN((inbuf_len / 2) * 2,
-               (fn->bufsize - fn->loaded) / 2 * 2);
+       size_t i, length = PARA_MIN((inbuf_len / 2),
+               (fn->bufsize - fn->loaded) / 2);
        struct private_amp_data *pad = fn->private_data;
        int16_t *ip = (int16_t *)inbuf, *op = (int16_t *)(fn->buf + fn->loaded);
+       int factor = 64 + pad->amp;
 
        if (!length)
                return 0;
-       for (i = 0; i < length / 2; i++) {
-               int x = (PARA_ABS(*ip) * (64 + pad->amp)) >> 6;
-               *op++ = *ip++ > 0? PARA_MIN(x, 32767) : PARA_MAX(-x, -32768);
+
+       if (pad->amp == 0) {
+               memcpy(op, ip, length * 2);
+               goto out;
+       }
+       for (i = 0; i < length; i++) {
+               int x = (ip[i] * factor) >> 6;
+
+               op[i] = x;
+               if (op[i] != x)
+                       op[i] = (x >= 32768)? 32767 : -32768;
        }
-       fn->loaded += length;
-       return length;
+out:
+       fn->loaded += length * 2;
+       return length * 2;
 }
 
 static void amp_close(struct filter_node *fn)
@@ -76,11 +88,9 @@ static void amp_open(struct filter_node *fn)
 
        pad->conf = fn->conf;
        fn->private_data = pad;
-       if (!pad->conf->amp_given && stat_item_values[SI_AMPLIFICATION]) {
-               int i = SI_AMPLIFICATION;
-               char *s = stat_item_values[i] + strlen(status_item_list[i]) + 1;
-               sscanf(s, "%u", &pad->amp);
-       } else
+       if (!pad->conf->amp_given && stat_item_values[SI_AMPLIFICATION])
+               sscanf(stat_item_values[SI_AMPLIFICATION], "%u", &pad->amp);
+       else
                pad->amp = pad->conf->amp_arg;
        fn->bufsize = AMP_CHUNK_SIZE;
        fn->buf = para_malloc(fn->bufsize);
@@ -101,8 +111,6 @@ void amp_filter_init(struct filter *f)
        f->convert = amp_convert;
        f->parse_config = amp_parse_config;
        f->help = (struct ggo_help) {
-               .purpose = amp_filter_args_info_purpose,
-               .usage = amp_filter_args_info_usage,
                .short_help = amp_filter_args_info_help,
                .detailed_help = amp_filter_args_info_detailed_help
        };