Commit 83fc370b authored by Benjamin Otte's avatar Benjamin Otte

Make alaw / mulaw work again.

Original commit message from CVS:
Make alaw / mulaw work again.
- fixed link functions
- make alaw encode/decode use alsa code, so it works right now
parent 1a8a2ef6
......@@ -2,7 +2,7 @@ plugindir = $(libdir)/gstreamer-@GST_MAJORMINOR@
plugin_LTLIBRARIES = libgstalaw.la libgstmulaw.la
libgstalaw_la_SOURCES = alaw-encode.c mulaw-conversion.c alaw-conversion.c alaw-decode.c alaw.c
libgstalaw_la_SOURCES = alaw-encode.c alaw-decode.c alaw.c
libgstalaw_la_CFLAGS = $(GST_CFLAGS)
libgstalaw_la_LIBADD =
libgstalaw_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
......@@ -12,4 +12,4 @@ libgstmulaw_la_CFLAGS = $(GST_CFLAGS)
libgstmulaw_la_LIBADD =
libgstmulaw_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = mulaw-conversion.h alaw-encode.h alaw-decode.h alaw-conversion.h mulaw-encode.h mulaw-decode.h
noinst_HEADERS = mulaw-conversion.h alaw-encode.h alaw-decode.h mulaw-encode.h mulaw-decode.h
/* $Id$
* Linux ISDN subsystem, audio conversion and compression (linklevel).
*
* Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
* DTMF code (c) 1996 by Christian Mock (cm@kukuruz.ping.at)
* Silence detection (c) 1998 by Armin Schindler (mac@gismo.telekom.de)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <glib.h>
/*
* Misc. lookup-tables.
*/
/* ulaw -> signed 16-bit */
/* defined but not used
static gint16 isdn_audio_ulaw_to_s16[] =
{
0x8284, 0x8684, 0x8a84, 0x8e84, 0x9284, 0x9684, 0x9a84, 0x9e84,
0xa284, 0xa684, 0xaa84, 0xae84, 0xb284, 0xb684, 0xba84, 0xbe84,
0xc184, 0xc384, 0xc584, 0xc784, 0xc984, 0xcb84, 0xcd84, 0xcf84,
0xd184, 0xd384, 0xd584, 0xd784, 0xd984, 0xdb84, 0xdd84, 0xdf84,
0xe104, 0xe204, 0xe304, 0xe404, 0xe504, 0xe604, 0xe704, 0xe804,
0xe904, 0xea04, 0xeb04, 0xec04, 0xed04, 0xee04, 0xef04, 0xf004,
0xf0c4, 0xf144, 0xf1c4, 0xf244, 0xf2c4, 0xf344, 0xf3c4, 0xf444,
0xf4c4, 0xf544, 0xf5c4, 0xf644, 0xf6c4, 0xf744, 0xf7c4, 0xf844,
0xf8a4, 0xf8e4, 0xf924, 0xf964, 0xf9a4, 0xf9e4, 0xfa24, 0xfa64,
0xfaa4, 0xfae4, 0xfb24, 0xfb64, 0xfba4, 0xfbe4, 0xfc24, 0xfc64,
0xfc94, 0xfcb4, 0xfcd4, 0xfcf4, 0xfd14, 0xfd34, 0xfd54, 0xfd74,
0xfd94, 0xfdb4, 0xfdd4, 0xfdf4, 0xfe14, 0xfe34, 0xfe54, 0xfe74,
0xfe8c, 0xfe9c, 0xfeac, 0xfebc, 0xfecc, 0xfedc, 0xfeec, 0xfefc,
0xff0c, 0xff1c, 0xff2c, 0xff3c, 0xff4c, 0xff5c, 0xff6c, 0xff7c,
0xff88, 0xff90, 0xff98, 0xffa0, 0xffa8, 0xffb0, 0xffb8, 0xffc0,
0xffc8, 0xffd0, 0xffd8, 0xffe0, 0xffe8, 0xfff0, 0xfff8, 0x0000,
0x7d7c, 0x797c, 0x757c, 0x717c, 0x6d7c, 0x697c, 0x657c, 0x617c,
0x5d7c, 0x597c, 0x557c, 0x517c, 0x4d7c, 0x497c, 0x457c, 0x417c,
0x3e7c, 0x3c7c, 0x3a7c, 0x387c, 0x367c, 0x347c, 0x327c, 0x307c,
0x2e7c, 0x2c7c, 0x2a7c, 0x287c, 0x267c, 0x247c, 0x227c, 0x207c,
0x1efc, 0x1dfc, 0x1cfc, 0x1bfc, 0x1afc, 0x19fc, 0x18fc, 0x17fc,
0x16fc, 0x15fc, 0x14fc, 0x13fc, 0x12fc, 0x11fc, 0x10fc, 0x0ffc,
0x0f3c, 0x0ebc, 0x0e3c, 0x0dbc, 0x0d3c, 0x0cbc, 0x0c3c, 0x0bbc,
0x0b3c, 0x0abc, 0x0a3c, 0x09bc, 0x093c, 0x08bc, 0x083c, 0x07bc,
0x075c, 0x071c, 0x06dc, 0x069c, 0x065c, 0x061c, 0x05dc, 0x059c,
0x055c, 0x051c, 0x04dc, 0x049c, 0x045c, 0x041c, 0x03dc, 0x039c,
0x036c, 0x034c, 0x032c, 0x030c, 0x02ec, 0x02cc, 0x02ac, 0x028c,
0x026c, 0x024c, 0x022c, 0x020c, 0x01ec, 0x01cc, 0x01ac, 0x018c,
0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104,
0x00f4, 0x00e4, 0x00d4, 0x00c4, 0x00b4, 0x00a4, 0x0094, 0x0084,
0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040,
0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000
};
*/
/* alaw -> signed 16-bit */
/* defined but not used
static gint16 isdn_audio_alaw_to_s16[] =
{
0x13fc, 0xec04, 0x0144, 0xfebc, 0x517c, 0xae84, 0x051c, 0xfae4,
0x0a3c, 0xf5c4, 0x0048, 0xffb8, 0x287c, 0xd784, 0x028c, 0xfd74,
0x1bfc, 0xe404, 0x01cc, 0xfe34, 0x717c, 0x8e84, 0x071c, 0xf8e4,
0x0e3c, 0xf1c4, 0x00c4, 0xff3c, 0x387c, 0xc784, 0x039c, 0xfc64,
0x0ffc, 0xf004, 0x0104, 0xfefc, 0x417c, 0xbe84, 0x041c, 0xfbe4,
0x083c, 0xf7c4, 0x0008, 0xfff8, 0x207c, 0xdf84, 0x020c, 0xfdf4,
0x17fc, 0xe804, 0x018c, 0xfe74, 0x617c, 0x9e84, 0x061c, 0xf9e4,
0x0c3c, 0xf3c4, 0x0084, 0xff7c, 0x307c, 0xcf84, 0x030c, 0xfcf4,
0x15fc, 0xea04, 0x0164, 0xfe9c, 0x597c, 0xa684, 0x059c, 0xfa64,
0x0b3c, 0xf4c4, 0x0068, 0xff98, 0x2c7c, 0xd384, 0x02cc, 0xfd34,
0x1dfc, 0xe204, 0x01ec, 0xfe14, 0x797c, 0x8684, 0x07bc, 0xf844,
0x0f3c, 0xf0c4, 0x00e4, 0xff1c, 0x3c7c, 0xc384, 0x03dc, 0xfc24,
0x11fc, 0xee04, 0x0124, 0xfedc, 0x497c, 0xb684, 0x049c, 0xfb64,
0x093c, 0xf6c4, 0x0028, 0xffd8, 0x247c, 0xdb84, 0x024c, 0xfdb4,
0x19fc, 0xe604, 0x01ac, 0xfe54, 0x697c, 0x9684, 0x069c, 0xf964,
0x0d3c, 0xf2c4, 0x00a4, 0xff5c, 0x347c, 0xcb84, 0x034c, 0xfcb4,
0x12fc, 0xed04, 0x0134, 0xfecc, 0x4d7c, 0xb284, 0x04dc, 0xfb24,
0x09bc, 0xf644, 0x0038, 0xffc8, 0x267c, 0xd984, 0x026c, 0xfd94,
0x1afc, 0xe504, 0x01ac, 0xfe54, 0x6d7c, 0x9284, 0x06dc, 0xf924,
0x0dbc, 0xf244, 0x00b4, 0xff4c, 0x367c, 0xc984, 0x036c, 0xfc94,
0x0f3c, 0xf0c4, 0x00f4, 0xff0c, 0x3e7c, 0xc184, 0x03dc, 0xfc24,
0x07bc, 0xf844, 0x0008, 0xfff8, 0x1efc, 0xe104, 0x01ec, 0xfe14,
0x16fc, 0xe904, 0x0174, 0xfe8c, 0x5d7c, 0xa284, 0x05dc, 0xfa24,
0x0bbc, 0xf444, 0x0078, 0xff88, 0x2e7c, 0xd184, 0x02ec, 0xfd14,
0x14fc, 0xeb04, 0x0154, 0xfeac, 0x557c, 0xaa84, 0x055c, 0xfaa4,
0x0abc, 0xf544, 0x0058, 0xffa8, 0x2a7c, 0xd584, 0x02ac, 0xfd54,
0x1cfc, 0xe304, 0x01cc, 0xfe34, 0x757c, 0x8a84, 0x075c, 0xf8a4,
0x0ebc, 0xf144, 0x00d4, 0xff2c, 0x3a7c, 0xc584, 0x039c, 0xfc64,
0x10fc, 0xef04, 0x0114, 0xfeec, 0x457c, 0xba84, 0x045c, 0xfba4,
0x08bc, 0xf744, 0x0018, 0xffe8, 0x227c, 0xdd84, 0x022c, 0xfdd4,
0x18fc, 0xe704, 0x018c, 0xfe74, 0x657c, 0x9a84, 0x065c, 0xf9a4,
0x0cbc, 0xf344, 0x0094, 0xff6c, 0x327c, 0xcd84, 0x032c, 0xfcd4
};
*/
/* alaw -> ulaw */
static guint8 isdn_audio_alaw_to_ulaw[] =
{
0xab, 0x2b, 0xe3, 0x63, 0x8b, 0x0b, 0xc9, 0x49,
0xba, 0x3a, 0xf6, 0x76, 0x9b, 0x1b, 0xd7, 0x57,
0xa3, 0x23, 0xdd, 0x5d, 0x83, 0x03, 0xc1, 0x41,
0xb2, 0x32, 0xeb, 0x6b, 0x93, 0x13, 0xcf, 0x4f,
0xaf, 0x2f, 0xe7, 0x67, 0x8f, 0x0f, 0xcd, 0x4d,
0xbe, 0x3e, 0xfe, 0x7e, 0x9f, 0x1f, 0xdb, 0x5b,
0xa7, 0x27, 0xdf, 0x5f, 0x87, 0x07, 0xc5, 0x45,
0xb6, 0x36, 0xef, 0x6f, 0x97, 0x17, 0xd3, 0x53,
0xa9, 0x29, 0xe1, 0x61, 0x89, 0x09, 0xc7, 0x47,
0xb8, 0x38, 0xf2, 0x72, 0x99, 0x19, 0xd5, 0x55,
0xa1, 0x21, 0xdc, 0x5c, 0x81, 0x01, 0xbf, 0x3f,
0xb0, 0x30, 0xe9, 0x69, 0x91, 0x11, 0xce, 0x4e,
0xad, 0x2d, 0xe5, 0x65, 0x8d, 0x0d, 0xcb, 0x4b,
0xbc, 0x3c, 0xfa, 0x7a, 0x9d, 0x1d, 0xd9, 0x59,
0xa5, 0x25, 0xde, 0x5e, 0x85, 0x05, 0xc3, 0x43,
0xb4, 0x34, 0xed, 0x6d, 0x95, 0x15, 0xd1, 0x51,
0xac, 0x2c, 0xe4, 0x64, 0x8c, 0x0c, 0xca, 0x4a,
0xbb, 0x3b, 0xf8, 0x78, 0x9c, 0x1c, 0xd8, 0x58,
0xa4, 0x24, 0xde, 0x5e, 0x84, 0x04, 0xc2, 0x42,
0xb3, 0x33, 0xec, 0x6c, 0x94, 0x14, 0xd0, 0x50,
0xb0, 0x30, 0xe8, 0x68, 0x90, 0x10, 0xce, 0x4e,
0xbf, 0x3f, 0xfe, 0x7e, 0xa0, 0x20, 0xdc, 0x5c,
0xa8, 0x28, 0xe0, 0x60, 0x88, 0x08, 0xc6, 0x46,
0xb7, 0x37, 0xf0, 0x70, 0x98, 0x18, 0xd4, 0x54,
0xaa, 0x2a, 0xe2, 0x62, 0x8a, 0x0a, 0xc8, 0x48,
0xb9, 0x39, 0xf4, 0x74, 0x9a, 0x1a, 0xd6, 0x56,
0xa2, 0x22, 0xdd, 0x5d, 0x82, 0x02, 0xc0, 0x40,
0xb1, 0x31, 0xea, 0x6a, 0x92, 0x12, 0xcf, 0x4f,
0xae, 0x2e, 0xe6, 0x66, 0x8e, 0x0e, 0xcc, 0x4c,
0xbd, 0x3d, 0xfc, 0x7c, 0x9e, 0x1e, 0xda, 0x5a,
0xa6, 0x26, 0xdf, 0x5f, 0x86, 0x06, 0xc4, 0x44,
0xb5, 0x35, 0xee, 0x6e, 0x96, 0x16, 0xd2, 0x52
};
/* ulaw -> alaw */
static guint8 isdn_audio_ulaw_to_alaw[] =
{
0xab, 0x55, 0xd5, 0x15, 0x95, 0x75, 0xf5, 0x35,
0xb5, 0x45, 0xc5, 0x05, 0x85, 0x65, 0xe5, 0x25,
0xa5, 0x5d, 0xdd, 0x1d, 0x9d, 0x7d, 0xfd, 0x3d,
0xbd, 0x4d, 0xcd, 0x0d, 0x8d, 0x6d, 0xed, 0x2d,
0xad, 0x51, 0xd1, 0x11, 0x91, 0x71, 0xf1, 0x31,
0xb1, 0x41, 0xc1, 0x01, 0x81, 0x61, 0xe1, 0x21,
0x59, 0xd9, 0x19, 0x99, 0x79, 0xf9, 0x39, 0xb9,
0x49, 0xc9, 0x09, 0x89, 0x69, 0xe9, 0x29, 0xa9,
0xd7, 0x17, 0x97, 0x77, 0xf7, 0x37, 0xb7, 0x47,
0xc7, 0x07, 0x87, 0x67, 0xe7, 0x27, 0xa7, 0xdf,
0x9f, 0x7f, 0xff, 0x3f, 0xbf, 0x4f, 0xcf, 0x0f,
0x8f, 0x6f, 0xef, 0x2f, 0x53, 0x13, 0x73, 0x33,
0xb3, 0x43, 0xc3, 0x03, 0x83, 0x63, 0xe3, 0x23,
0xa3, 0x5b, 0xdb, 0x1b, 0x9b, 0x7b, 0xfb, 0x3b,
0xbb, 0xbb, 0x4b, 0x4b, 0xcb, 0xcb, 0x0b, 0x0b,
0x8b, 0x8b, 0x6b, 0x6b, 0xeb, 0xeb, 0x2b, 0x2b,
0xab, 0x54, 0xd4, 0x14, 0x94, 0x74, 0xf4, 0x34,
0xb4, 0x44, 0xc4, 0x04, 0x84, 0x64, 0xe4, 0x24,
0xa4, 0x5c, 0xdc, 0x1c, 0x9c, 0x7c, 0xfc, 0x3c,
0xbc, 0x4c, 0xcc, 0x0c, 0x8c, 0x6c, 0xec, 0x2c,
0xac, 0x50, 0xd0, 0x10, 0x90, 0x70, 0xf0, 0x30,
0xb0, 0x40, 0xc0, 0x00, 0x80, 0x60, 0xe0, 0x20,
0x58, 0xd8, 0x18, 0x98, 0x78, 0xf8, 0x38, 0xb8,
0x48, 0xc8, 0x08, 0x88, 0x68, 0xe8, 0x28, 0xa8,
0xd6, 0x16, 0x96, 0x76, 0xf6, 0x36, 0xb6, 0x46,
0xc6, 0x06, 0x86, 0x66, 0xe6, 0x26, 0xa6, 0xde,
0x9e, 0x7e, 0xfe, 0x3e, 0xbe, 0x4e, 0xce, 0x0e,
0x8e, 0x6e, 0xee, 0x2e, 0x52, 0x12, 0x72, 0x32,
0xb2, 0x42, 0xc2, 0x02, 0x82, 0x62, 0xe2, 0x22,
0xa2, 0x5a, 0xda, 0x1a, 0x9a, 0x7a, 0xfa, 0x3a,
0xba, 0xba, 0x4a, 0x4a, 0xca, 0xca, 0x0a, 0x0a,
0x8a, 0x8a, 0x6a, 0x6a, 0xea, 0xea, 0x2a, 0x2a
};
static inline void
isdn_audio_tlookup(const guint8 *table, guint8 *buff, gulong n)
{
while (n--)
{
*buff = table[*(unsigned char *)buff];
buff++;
}
}
void
isdn_audio_ulaw2alaw(guint8 *buff, gulong len)
{
isdn_audio_tlookup(isdn_audio_ulaw_to_alaw, buff, len);
}
void
isdn_audio_alaw2ulaw(guint8 *buff, gulong len)
{
isdn_audio_tlookup(isdn_audio_alaw_to_ulaw, buff, len);
}
#ifndef _GST_ALAW_CONVERSION_H
#define _GST_ALAW_CONVERSION_H
#include <glib.h>
void
isdn_audio_ulaw2alaw(guint8 *buff, gulong len);
void
isdn_audio_alaw2ulaw(guint8 *buff, gulong len);
#endif
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
* PCM - A-Law conversion
* Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
*
* 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.
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
......@@ -19,8 +21,6 @@
#include <gst/gst.h>
#include "alaw-decode.h"
#include "mulaw-conversion.h"
#include "alaw-conversion.h"
extern GstPadTemplate *alawdec_src_template, *alawdec_sink_template;
......@@ -46,35 +46,59 @@ static void gst_alawdec_chain (GstPad *pad, GstBuffer *buf);
static GstElementClass *parent_class = NULL;
/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
/*
static GstPadNegotiateReturn
alawdec_negotiate_sink (GstPad *pad, GstCaps **caps, gint counter)
* alaw_to_s16() - Convert an A-law value to 16-bit linear PCM
*
*/
static gint alaw_to_s16(guint8 a_val)
{
gint t;
gint seg;
a_val ^= 0x55;
t = a_val & 0x7f;
if (t < 16)
t = (t << 4) + 8;
else {
seg = (t >> 4) & 0x07;
t = ((t & 0x0f) << 4) + 0x108;
t <<= seg -1;
}
return ((a_val & 0x80) ? t : -t);
}
static GstPadLinkReturn
alawdec_link (GstPad *pad, GstCaps *caps)
{
GstCaps* tempcaps;
gint rate, channels;
GstALawDec* alawdec=GST_ALAWDEC (GST_OBJECT_PARENT (pad));
GstALawDec* alawdec = GST_ALAWDEC (GST_OBJECT_PARENT (pad));
if (*caps==NULL)
return GST_PAD_NEGOTIATE_FAIL;
tempcaps = gst_caps_copy(*caps);
gst_caps_set(tempcaps,"format",GST_PROPS_STRING("int"));
gst_caps_set(tempcaps,"law",GST_PROPS_INT(0));
gst_caps_set(tempcaps,"depth",GST_PROPS_INT(16));
gst_caps_set(tempcaps,"width",GST_PROPS_INT(16));
gst_caps_set(tempcaps,"signed",GST_PROPS_BOOLEAN(TRUE));
if (gst_pad_try_set_caps (alawdec->srcpad, tempcaps) > 0)
{
return GST_PAD_NEGOTIATE_AGREE;
}
else {
gst_caps_unref (tempcaps);
return GST_PAD_NEGOTIATE_FAIL;
}
}
*/
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
if (!gst_caps_get (caps, "rate", &rate,
"channels", &channels,
NULL))
return GST_PAD_LINK_DELAYED;
tempcaps = GST_CAPS_NEW (
"alawdec_src_caps",
"audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"depth", GST_PROPS_INT (16),
"width", GST_PROPS_INT (16),
"signed", GST_PROPS_BOOLEAN (TRUE),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"rate", GST_PROPS_INT (rate),
"channels", GST_PROPS_INT (channels),
NULL);
return gst_pad_try_set_caps (alawdec->srcpad, tempcaps);
}
GType
gst_alawdec_get_type(void) {
......@@ -116,7 +140,7 @@ gst_alawdec_init (GstALawDec *alawdec)
{
alawdec->sinkpad = gst_pad_new_from_template(alawdec_sink_template,"sink");
alawdec->srcpad = gst_pad_new_from_template(alawdec_src_template,"src");
/*gst_pad_set_negotiate_function(alawdec->sinkpad, alawdec_negotiate_sink);*/
gst_pad_set_link_function(alawdec->sinkpad, alawdec_link);
gst_element_add_pad(GST_ELEMENT(alawdec),alawdec->sinkpad);
gst_pad_set_chain_function(alawdec->sinkpad,gst_alawdec_chain);
......@@ -130,6 +154,7 @@ gst_alawdec_chain (GstPad *pad,GstBuffer *buf)
gint16 *linear_data;
guint8 *alaw_data;
GstBuffer* outbuf;
gint i;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
......@@ -145,9 +170,11 @@ gst_alawdec_chain (GstPad *pad,GstBuffer *buf)
GST_BUFFER_SIZE(outbuf) = GST_BUFFER_SIZE(buf)*2;
linear_data = (gint16*)GST_BUFFER_DATA(outbuf);
isdn_audio_alaw2ulaw(alaw_data,GST_BUFFER_SIZE(buf));
mulaw_decode(alaw_data,linear_data,GST_BUFFER_SIZE(buf));
for (i = 0; i < GST_BUFFER_SIZE(buf); i++) {
*linear_data = alaw_to_s16 (*alaw_data);
linear_data++;
alaw_data++;
}
gst_buffer_unref(buf);
gst_pad_push(alawdec->srcpad,outbuf);
......
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
* PCM - A-Law conversion
* Copyright (C) 2000 by Abramo Bagnara <abramo@alsa-project.org>
*
* 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.
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
......@@ -19,8 +21,6 @@
#include <gst/gst.h>
#include "alaw-encode.h"
#include "mulaw-conversion.h"
#include "alaw-conversion.h"
extern GstPadTemplate *alawenc_src_template, *alawenc_sink_template;
......@@ -43,39 +43,101 @@ static void gst_alawenc_get_property (GObject *object, guint prop_id, GValue
static void gst_alawenc_chain (GstPad *pad, GstBuffer *buf);
/*
* s16_to_alaw() - Convert a 16-bit linear PCM value to 8-bit A-law
*
* s16_to_alaw() accepts an 16-bit integer and encodes it as A-law data.
*
* Linear Input Code Compressed Code
* ------------------------ ---------------
* 0000000wxyza 000wxyz
* 0000001wxyza 001wxyz
* 000001wxyzab 010wxyz
* 00001wxyzabc 011wxyz
* 0001wxyzabcd 100wxyz
* 001wxyzabcde 101wxyz
* 01wxyzabcdef 110wxyz
* 1wxyzabcdefg 111wxyz
*
* For further information see John C. Bellamy's Digital Telephony, 1982,
* John Wiley & Sons, pps 98-111 and 472-476.
*/
static inline gint val_seg(gint val)
{
gint r = 1;
val >>= 8;
if (val & 0xf0) {
val >>= 4;
r += 4;
}
if (val & 0x0c) {
val >>= 2;
r += 2;
}
if (val & 0x02)
r += 1;
return r;
}
static guint8 s16_to_alaw(gint pcm_val)
{
gint seg;
guint8 mask;
guint8 aval;
if (pcm_val >= 0) {
mask = 0xD5;
} else {
mask = 0x55;
pcm_val = -pcm_val;
if (pcm_val > 0x7fff)
pcm_val = 0x7fff;
}
if (pcm_val < 256)
aval = pcm_val >> 4;
else {
/* Convert the scaled magnitude to segment number. */
seg = val_seg(pcm_val);
aval = (seg << 4) | ((pcm_val >> (seg + 3)) & 0x0f);
}
return aval ^ mask;
}
static GstElementClass *parent_class = NULL;
/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
/*
static GstPadNegotiateReturn
alawenc_negotiate_sink (GstPad *pad, GstCaps **caps, gint counter)
static GstPadLinkReturn
alawenc_link (GstPad *pad, GstCaps *caps)
{
GstCaps* tempcaps;
gint rate, channels;
GstALawEnc* alawenc=GST_ALAWENC (GST_OBJECT_PARENT (pad));
GstALawEnc* alawenc = GST_ALAWENC (GST_OBJECT_PARENT (pad));
if (*caps==NULL)
return GST_PAD_NEGOTIATE_FAIL;
tempcaps = gst_caps_copy(*caps);
gst_caps_set(tempcaps,"format",GST_PROPS_STRING("int"));
gst_caps_set(tempcaps,"law",GST_PROPS_INT(2));
gst_caps_set(tempcaps,"depth",GST_PROPS_INT(8));
gst_caps_set(tempcaps,"width",GST_PROPS_INT(8));
gst_caps_set(tempcaps,"signed",GST_PROPS_BOOLEAN(FALSE));
if (gst_pad_try_set_caps (alawenc->srcpad, tempcaps) > 0)
{
return GST_PAD_NEGOTIATE_AGREE;
}
else {
gst_caps_unref (tempcaps);
return GST_PAD_NEGOTIATE_FAIL;
}
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
if (!gst_caps_get (caps, "rate", &rate,
"channels", &channels,
NULL))
return GST_PAD_LINK_DELAYED;
tempcaps = GST_CAPS_NEW (
"alawenc_src_caps",
"audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (2),
"depth", GST_PROPS_INT (8),
"width", GST_PROPS_INT (8),
"signed", GST_PROPS_BOOLEAN (FALSE),
"rate", GST_PROPS_INT (rate),
"channels", GST_PROPS_INT (channels),
NULL);
return gst_pad_try_set_caps (alawenc->srcpad, tempcaps);
}
*/
GType
gst_alawenc_get_type(void) {
......@@ -117,7 +179,7 @@ gst_alawenc_init (GstALawEnc *alawenc)
{
alawenc->sinkpad = gst_pad_new_from_template(alawenc_sink_template,"sink");
alawenc->srcpad = gst_pad_new_from_template(alawenc_src_template,"src");
/*gst_pad_set_negotiate_function(alawenc->sinkpad, alawenc_negotiate_sink);*/
gst_pad_set_link_function (alawenc->sinkpad, alawenc_link);
gst_element_add_pad(GST_ELEMENT(alawenc),alawenc->sinkpad);
gst_pad_set_chain_function(alawenc->sinkpad,gst_alawenc_chain);
......@@ -131,6 +193,7 @@ gst_alawenc_chain (GstPad *pad,GstBuffer *buf)
gint16 *linear_data;
guint8 *alaw_data;
GstBuffer* outbuf;
gint i;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
......@@ -142,12 +205,16 @@ gst_alawenc_chain (GstPad *pad,GstBuffer *buf)
linear_data = (gint16 *)GST_BUFFER_DATA(buf);
outbuf=gst_buffer_new();
GST_BUFFER_DATA(outbuf) = (gchar*)g_new(gint16,GST_BUFFER_SIZE(buf)/4);
GST_BUFFER_DATA(outbuf) = (gchar*)g_new(guint8,GST_BUFFER_SIZE(buf)/2);
GST_BUFFER_SIZE(outbuf) = GST_BUFFER_SIZE(buf)/2;
alaw_data = (guint8*)GST_BUFFER_DATA(outbuf);
mulaw_encode(linear_data,alaw_data,GST_BUFFER_SIZE(outbuf));
isdn_audio_ulaw2alaw(alaw_data,GST_BUFFER_SIZE(outbuf));
for (i = 0; i < GST_BUFFER_SIZE(outbuf); i++) {
*alaw_data = s16_to_alaw (*linear_data);
*alaw_data++;
*linear_data++;
}
gst_buffer_unref(buf);
gst_pad_push(alawenc->srcpad,outbuf);
}
......
......@@ -51,6 +51,7 @@ linear_factory (void)
"law", GST_PROPS_INT(0),
"width", GST_PROPS_INT(16),
"depth", GST_PROPS_INT(16),
"endianness", GST_PROPS_INT(G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN(TRUE),
NULL));
}
......
......@@ -48,26 +48,36 @@ static GstElementClass *parent_class = NULL;
static GstPadLinkReturn
mulawdec_connect_sink (GstPad *pad, GstCaps *caps)
mulawdec_link (GstPad *pad, GstCaps *caps)
{
GstCaps *newcaps;
GstMuLawDec* mulawdec=GST_MULAWDEC (GST_OBJECT_PARENT (pad));
GstCaps* tempcaps;
gint rate, channels;
if (caps==NULL)
return GST_PAD_LINK_REFUSED;
newcaps = gst_caps_copy(caps);
gst_caps_set(newcaps,"format",GST_PROPS_STRING("int"));
gst_caps_set(newcaps,"law",GST_PROPS_INT(0));
gst_caps_set(newcaps,"depth",GST_PROPS_INT(16));
gst_caps_set(newcaps,"width",GST_PROPS_INT(16));
gst_caps_set(newcaps,"signed",GST_PROPS_BOOLEAN(TRUE));
if (GST_CAPS_IS_FIXED (newcaps))
return gst_pad_try_set_caps (mulawdec->srcpad, newcaps);
return GST_PAD_LINK_DELAYED;
}
GstMuLawDec* mulawdec = GST_MULAWDEC (GST_OBJECT_PARENT (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
if (!gst_caps_get (caps, "rate", &rate,
"channels", &channels,
NULL))
return GST_PAD_LINK_DELAYED;
tempcaps = GST_CAPS_NEW (
"sinesrc_src_caps",
"audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"depth", GST_PROPS_INT (16),
"width", GST_PROPS_INT (16),
"signed", GST_PROPS_BOOLEAN (TRUE),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"rate", GST_PROPS_INT (rate),
"channels", GST_PROPS_INT (channels),
NULL);
return gst_pad_try_set_caps (mulawdec->srcpad, tempcaps);
}
GType
gst_mulawdec_get_type(void) {
......@@ -109,7 +119,7 @@ gst_mulawdec_init (GstMuLawDec *mulawdec)
{
mulawdec->sinkpad = gst_pad_new_from_template(mulawdec_sink_template,"sink");
mulawdec->srcpad = gst_pad_new_from_template(mulawdec_src_template,"src");
gst_pad_set_link_function(mulawdec->sinkpad, mulawdec_connect_sink);
gst_pad_set_link_function(mulawdec->sinkpad, mulawdec_link);
gst_element_add_pad(GST_ELEMENT(mulawdec),mulawdec->sinkpad);
gst_pad_set_chain_function(mulawdec->sinkpad,gst_mulawdec_chain);
......
......@@ -60,7 +60,7 @@ mulawenc_link (GstPad *pad, GstCaps *caps)
if (!gst_caps_get (caps, "rate", &rate,
"channels", &channels,
NULL))
return GST_PAD_LINK_REFUSED;
return GST_PAD_LINK_DELAYED;
tempcaps = GST_CAPS_NEW (
"sinesrc_src_caps",
......
......@@ -52,6 +52,7 @@ linear_factory (void)
"width", GST_PROPS_INT(16),
"depth", GST_PROPS_INT(16),
"signed", GST_PROPS_BOOLEAN(TRUE),
"endianness", GST_PROPS_INT(G_BYTE_ORDER),
NULL));
}
......
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