From: Abramo Bagnara <abramo@alsa-project.org>
Date: Wed, 22 Mar 2000 16:22:12 +0000 (+0000)
Subject: Removed volbal plugin (substituted with route)
X-Git-Tag: v1.0.3~1300
X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=e7d099089c2daf339f842863dce28eb968abdde0;p=alsa-lib.git

Removed volbal plugin (substituted with route)
---

diff --git a/src/pcm/plugin/volbal.c b/src/pcm/plugin/volbal.c
deleted file mode 100644
index 6deef5e6..00000000
--- a/src/pcm/plugin/volbal.c
+++ /dev/null
@@ -1,169 +0,0 @@
-/*
- *  Volume and balance Plug-In
- *  Copyright (c) 1999 by Abramo Bagnara <abbagnara@racine.ra.it>
- *
- *
- *   This library is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU Library General Public License as
- *   published by the Free Software Foundation; either version 2 of
- *   the License, or (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU Library General Public License for more details.
- *
- *   You should have received a copy of the GNU Library General Public
- *   License along with this library; if not, write to the Free Software
- *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-  
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <endian.h>
-#include <byteswap.h>
-#include "../pcm_local.h"
-
-#define VOLBAL_RESOLUTION 16
-
-struct volbal_private_data {
-	int src_voices;
-	unsigned int noop:1;
-	int ttable[0];
-};
-
-static int volbal_load_ttable(struct volbal_private_data *data, 
-			      const int *src_ttable)
-{
-	int src_voice, dst_voice;
-	const int *sptr;
-	int *dptr;
-	data->noop = 1;
-	if (src_ttable == NULL)
-		return 0;
-	dptr = data->ttable;
-	sptr = src_ttable;
-	for (dst_voice = 0; dst_voice < data->src_voices; ++dst_voice) {
-		int t = 0;
-		for (src_voice = 0; src_voice < data->src_voices; ++src_voice) {
-			if (*sptr < 0 || *sptr > VOLBAL_RESOLUTION)
-				return -EINVAL;
-			if (src_voice == dst_voice) {
-				if (*sptr != VOLBAL_RESOLUTION)
-					data->noop = 0;
-			}
-			else {
-				if (*sptr != 0)
-					data->noop = 0;
-			}
-			t += *sptr;
-			*dptr++ = *sptr++;
-		}
-		if (t > VOLBAL_RESOLUTION)
-			return -EINVAL;
-	}
-	return 0;
-}
-
-static void volbal(int voices, int samples, int *ttable,
-		   signed short *src_ptr, signed short *dst_ptr)
-{
-	while (samples-- > 0) {
-		int dst_voice;
-		int *t = ttable;
-		for (dst_voice = 0; dst_voice < voices; ++dst_voice) {
-			int v = 0;
-			int src_voice;
-			signed short *s = src_ptr;
-			for (src_voice = 0; src_voice < voices; ++src_voice) {
-				v +=  (int) *s++ * *t++ / VOLBAL_RESOLUTION;
-			}
-			*dst_ptr++ = v;
-		}
-		src_ptr += voices;
-	}
-}
-
-static ssize_t volbal_transfer(snd_pcm_plugin_t *plugin,
-			     char *src_ptr, size_t src_size,
-			     char *dst_ptr, size_t dst_size)
-{
-	struct volbal_private_data *data;
-
-	if (plugin == NULL || src_ptr == NULL || src_size < 0 ||
-	                      dst_ptr == NULL || dst_size < 0)
-		return -EINVAL;
-	if (src_size == 0)
-		return 0;
-	data = (struct volbal_private_data *)snd_pcm_plugin_extra_data(plugin);
-	if (data->noop) {
-		memcpy(dst_ptr, src_ptr, src_size);
-		return src_size;
-	}
-
-	volbal(data->src_voices, src_size / 2 / data->src_voices, data->ttable,
-	       (signed short *)src_ptr, (signed short *)dst_ptr);
-	return src_size;
-}
-
-static ssize_t volbal_src_size(snd_pcm_plugin_t *plugin, size_t size)
-{
-	if (!plugin || size <= 0)
-		return -EINVAL;
-	return size;
-}
-
-static ssize_t volbal_dst_size(snd_pcm_plugin_t *plugin, size_t size)
-{
-	if (!plugin || size <= 0)
-		return -EINVAL;
-	return size;
-}
-
-int snd_pcm_plugin_build_volbal(snd_pcm_format_t *src_format,
-				snd_pcm_format_t *dst_format,
-				int *ttable,
-				snd_pcm_plugin_t **r_plugin)
-{
-	struct volbal_private_data *data;
-	snd_pcm_plugin_t *plugin;
-	int err;
-
-	if (!r_plugin)
-		return -EINVAL;
-	*r_plugin = NULL;
-	if (src_format->interleave != dst_format->interleave)
-		return -EINVAL;
-	if (!dst_format->interleave)
-		return -EINVAL;
-	if (src_format->format != dst_format->format)
-		return -EINVAL;
-	if (src_format->rate != dst_format->rate)
-		return -EINVAL;
-	if (src_format->voices != dst_format->voices)
-		return -EINVAL;
-
-	if (src_format->voices < 1)
-		return -EINVAL;
-	if (src_format->format != SND_PCM_SFMT_S16_LE)
-		return -EINVAL;
-	plugin = snd_pcm_plugin_build("Volume/balance conversion",
-				      sizeof(struct volbal_private_data) + 
-				      sizeof(data->ttable[0]) * src_format->voices * src_format->voices);
-	if (plugin == NULL)
-		return -ENOMEM;
-	data = (struct volbal_private_data *)snd_pcm_plugin_extra_data(plugin);
-
-	data->src_voices = src_format->voices;
-	if ((err = volbal_load_ttable(data, ttable)) < 0)
-		return err;
-	plugin->transfer = volbal_transfer;
-	plugin->src_size = volbal_src_size;
-	plugin->dst_size = volbal_dst_size;
-	*r_plugin = plugin;
-	return 0;
-}