X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=amp_filter.c;h=29c62e3bf580931788d28c0dd5ddb051f119f256;hp=e91791bf8655e58cbc494901ad232fc1787cbe10;hb=60ef885705932a682097ad2b9f2379282d814e79;hpb=c282c836791cedf57c128555af90af37c7c01c05

diff --git a/amp_filter.c b/amp_filter.c
index e91791bf..29c62e3b 100644
--- a/amp_filter.c
+++ b/amp_filter.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2009-2010 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -19,9 +19,6 @@
 #include "string.h"
 #include "error.h"
 
-/** The size of the output data buffer. */
-#define AMP_CHUNK_SIZE 40960
-
 extern char *stat_item_values[NUM_STAT_ITEMS];
 
 /** Data specific to the amplify filter. */
@@ -32,37 +29,9 @@ struct private_amp_data {
 	unsigned amp;
 };
 
-static ssize_t amp_convert(char *inbuf, size_t inbuf_len, struct filter_node *fn)
-{
-	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;
-
-	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;
-	}
-out:
-	fn->loaded += length * 2;
-	return length * 2;
-}
-
 static void amp_close(struct filter_node *fn)
 {
 	free(fn->private_data);
-	free(fn->buf);
 }
 
 static int amp_parse_config(int argc, char **argv, void **config)
@@ -75,8 +44,6 @@ static int amp_parse_config(int argc, char **argv, void **config)
 	ret = -ERRNO_TO_PARA_ERROR(EINVAL);
 	if (amp_conf->amp_arg < 0)
 		goto err;
-	PARA_NOTICE_LOG("amplification: %u (scaling factor: %1.2f)\n",
-		amp_conf->amp_arg, amp_conf->amp_arg / 64.0 + 1.0);
 	*config = amp_conf;
 	return 1;
 err:
@@ -95,8 +62,8 @@ static void amp_open(struct filter_node *fn)
 		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);
+	PARA_NOTICE_LOG("amplification: %u (scaling factor: %1.2f)\n",
+		pad->amp, pad->amp / 64.0 + 1.0);
 }
 
 static void amp_post_select(__a_unused struct sched *s, struct task *t)
@@ -112,7 +79,6 @@ static void amp_post_select(__a_unused struct sched *s, struct task *t)
 	if (pad->amp == 0) { /* no amplification */
 		t->error = -E_AMP_ZERO_AMP;
 		btr_splice_out_node(btrn);
-		amp_close(fn);
 		return;
 	}
 next_buffer:
@@ -173,7 +139,6 @@ void amp_filter_init(struct filter *f)
 	amp_cmdline_parser_init(&dummy);
 	f->open = amp_open;
 	f->close = amp_close;
-	f->convert = amp_convert;
 	f->pre_select = generic_filter_pre_select;
 	f->post_select = amp_post_select;
 	f->parse_config = amp_parse_config;