gst/auparse/gstauparse.c - imx-gst-plugins-good - Git at Google

 /* GStreamer
  * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
  *
  * 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 library 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., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  */
 /* Element-Checklist-Version: 5 */

 /* 2001/04/03 - Updated parseau to use caps nego
  *              Zaheer Merali <zaheer@grid9.net
  */

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 #include <stdlib.h>
 #include <string.h>

 #include <gstauparse.h>
 #include <gst/audio/audio.h>

 /* elementfactory information */
 static GstElementDetails gst_auparse_details =
 GST_ELEMENT_DETAILS (".au parser",
     "Codec/Parser/Audio",
     "Parse an .au file into raw audio",
     "Erik Walthinsen <omega@cse.ogi.edu>");

 static GstStaticPadTemplate gst_auparse_sink_template =
 GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS ("audio/x-au")
     );

 static GstStaticPadTemplate gst_auparse_src_template =
     GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
 	"audio/x-alaw, "
 	"rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]")
     );

 /* AuParse signals and args */
 enum
 {
   /* FILL ME */
   LAST_SIGNAL
 };

 enum
 {
   ARG_0,
   /* FILL ME */
 };

 static void gst_auparse_base_init (gpointer g_class);
 static void gst_auparse_class_init (GstAuParseClass * klass);
 static void gst_auparse_init (GstAuParse * auparse);

 static void gst_auparse_chain (GstPad * pad, GstData * _data);

 static GstElementClass *parent_class = NULL;

 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */

 GType
 gst_auparse_get_type (void)
 {
   static GType auparse_type = 0;

   if (!auparse_type) {
     static const GTypeInfo auparse_info = {
       sizeof (GstAuParseClass),
       gst_auparse_base_init,
       NULL,
       (GClassInitFunc) gst_auparse_class_init,
       NULL,
       NULL,
       sizeof (GstAuParse),
       0,
       (GInstanceInitFunc) gst_auparse_init,
     };
     auparse_type =
 	g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
 	0);
   }
   return auparse_type;
 }

 static void
 gst_auparse_base_init (gpointer g_class)
 {
   GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

   gst_element_class_add_pad_template (element_class,
       gst_static_pad_template_get (&gst_auparse_sink_template));
   gst_element_class_add_pad_template (element_class,
       gst_static_pad_template_get (&gst_auparse_src_template));
   gst_element_class_set_details (element_class, &gst_auparse_details);

 }

 static void
 gst_auparse_class_init (GstAuParseClass * klass)
 {
   GstElementClass *gstelement_class;

   gstelement_class = (GstElementClass *) klass;

   parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
 }

 static void
 gst_auparse_init (GstAuParse * auparse)
 {
   auparse->sinkpad =
       gst_pad_new_from_template (gst_static_pad_template_get
       (&gst_auparse_sink_template), "sink");
   gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
   gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);

   auparse->srcpad =
       gst_pad_new_from_template (gst_static_pad_template_get
       (&gst_auparse_src_template), "src");
   gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
   gst_pad_use_explicit_caps (auparse->srcpad);

   auparse->offset = 0;
   auparse->size = 0;
   auparse->encoding = 0;
   auparse->frequency = 0;
   auparse->channels = 0;
 }

 static void
 gst_auparse_chain (GstPad * pad, GstData * _data)
 {
   GstBuffer *buf = GST_BUFFER (_data);
   GstAuParse *auparse;
   gchar *data;
   glong size;
   GstCaps *tempcaps;
   gint law, depth;
   gboolean sign;

   g_return_if_fail (pad != NULL);
   g_return_if_fail (GST_IS_PAD (pad));
   g_return_if_fail (buf != NULL);

   auparse = GST_AUPARSE (gst_pad_get_parent (pad));

   GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
       gst_element_get_name (GST_ELEMENT (auparse)));

   data = GST_BUFFER_DATA (buf);
   size = GST_BUFFER_SIZE (buf);

   /* if we haven't seen any data yet... */
   if (auparse->size == 0) {
     GstBuffer *newbuf;
     guint32 *head = (guint32 *) data;

     /* normal format is big endian (au is a Sparc format) */
     if (GUINT32_FROM_BE (*head) == 0x2e736e64) {
       head++;
       auparse->le = 0;
       auparse->offset = GUINT32_FROM_BE (*head);
       head++;
       auparse->size = GUINT32_FROM_BE (*head);
       head++;
       auparse->encoding = GUINT32_FROM_BE (*head);
       head++;
       auparse->frequency = GUINT32_FROM_BE (*head);
       head++;
       auparse->channels = GUINT32_FROM_BE (*head);
       head++;

       /* and of course, someone had to invent a little endian
        * version.  Used by DEC systems. */
     } else if (GUINT32_FROM_LE (*head) == 0x0064732E) {
       auparse->le = 1;
       head++;
       auparse->le = 0;
       auparse->offset = GUINT32_FROM_LE (*head);
       head++;
       auparse->size = GUINT32_FROM_LE (*head);
       head++;
       auparse->encoding = GUINT32_FROM_LE (*head);
       head++;
       auparse->frequency = GUINT32_FROM_LE (*head);
       head++;
       auparse->channels = GUINT32_FROM_LE (*head);
       head++;

     } else {
       g_warning ("help, dunno what I'm looking at!\n");
       gst_buffer_unref (buf);
       return;
     }

     g_print
 	("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
 	auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
 	auparse->channels);
     GST_DEBUG
 	("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
 	auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
 	auparse->channels);

     switch (auparse->encoding) {
       case 1:
 	law = 1;
 	depth = 8;
 	sign = FALSE;
 	break;
       case 2:
 	law = 0;
 	depth = 8;
 	sign = FALSE;
 	break;
       case 3:
 	law = 0;
 	depth = 16;
 	sign = TRUE;
 	break;
       default:
 	g_warning ("help!, dont know how to deal with this format yet\n");
 	return;
     }

     if (law) {
       tempcaps = gst_caps_new_simple ("audio/x-alaw",
 	  "rate", G_TYPE_INT, auparse->frequency,
 	  "channels", G_TYPE_INT, auparse->channels, NULL);
     } else {
       tempcaps = gst_caps_new_simple ("audio/x-raw-int",
 	  "endianness", G_TYPE_INT, G_BIG_ENDIAN,
 	  "rate", G_TYPE_INT, auparse->frequency,
 	  "channels", G_TYPE_INT, auparse->channels,
 	  "depth", G_TYPE_INT, depth,
 	  "width", G_TYPE_INT, depth, "signed", G_TYPE_BOOLEAN, sign, NULL);
     }

     if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
       gst_buffer_unref (buf);
       return;
     }

     newbuf = gst_buffer_new ();
     GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
     memcpy (GST_BUFFER_DATA (newbuf), data + 24, size - (auparse->offset));
     GST_BUFFER_SIZE (newbuf) = size - (auparse->offset);

     gst_buffer_unref (buf);

     gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
     return;
   }

   gst_pad_push (auparse->srcpad, GST_DATA (buf));
 }


 static gboolean
 plugin_init (GstPlugin * plugin)
 {
   if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
 	  GST_TYPE_AUPARSE)) {
     return FALSE;
   }

   return TRUE;
 }

 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
     GST_VERSION_MINOR,
     "auparse",
     "parses au streams", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)
	/* GStreamer
	* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
	*
	* 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 library 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., 59 Temple Place - Suite 330,
	* Boston, MA 02111-1307, USA.
	*/
	/* Element-Checklist-Version: 5 */

	/* 2001/04/03 - Updated parseau to use caps nego
	* Zaheer Merali <zaheer@grid9.net
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif
	#include <stdlib.h>
	#include <string.h>

	#include <gstauparse.h>
	#include <gst/audio/audio.h>

	/* elementfactory information */
	static GstElementDetails gst_auparse_details =
	GST_ELEMENT_DETAILS (".au parser",
	"Codec/Parser/Audio",
	"Parse an .au file into raw audio",
	"Erik Walthinsen <omega@cse.ogi.edu>");

	static GstStaticPadTemplate gst_auparse_sink_template =
	GST_STATIC_PAD_TEMPLATE ("sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS ("audio/x-au")
	);

	static GstStaticPadTemplate gst_auparse_src_template =
	GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
	"audio/x-alaw, "
	"rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]")
	);

	/* AuParse signals and args */
	enum
	{
	/* FILL ME */
	LAST_SIGNAL
	};

	enum
	{
	ARG_0,
	/* FILL ME */
	};

	static void gst_auparse_base_init (gpointer g_class);
	static void gst_auparse_class_init (GstAuParseClass * klass);
	static void gst_auparse_init (GstAuParse * auparse);

	static void gst_auparse_chain (GstPad * pad, GstData * _data);

	static GstElementClass *parent_class = NULL;

	/static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; /

	GType
	gst_auparse_get_type (void)
	{
	static GType auparse_type = 0;

	if (!auparse_type) {
	static const GTypeInfo auparse_info = {
	sizeof (GstAuParseClass),
	gst_auparse_base_init,
	NULL,
	(GClassInitFunc) gst_auparse_class_init,
	NULL,
	NULL,
	sizeof (GstAuParse),
	0,
	(GInstanceInitFunc) gst_auparse_init,
	};
	auparse_type =
	g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
	0);
	}
	return auparse_type;
	}

	static void
	gst_auparse_base_init (gpointer g_class)
	{
	GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

	gst_element_class_add_pad_template (element_class,
	gst_static_pad_template_get (&gst_auparse_sink_template));
	gst_element_class_add_pad_template (element_class,
	gst_static_pad_template_get (&gst_auparse_src_template));
	gst_element_class_set_details (element_class, &gst_auparse_details);

	}

	static void
	gst_auparse_class_init (GstAuParseClass * klass)
	{
	GstElementClass *gstelement_class;

	gstelement_class = (GstElementClass *) klass;

	parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
	}

	static void
	gst_auparse_init (GstAuParse * auparse)
	{
	auparse->sinkpad =
	gst_pad_new_from_template (gst_static_pad_template_get
	(&gst_auparse_sink_template), "sink");
	gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
	gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);

	auparse->srcpad =
	gst_pad_new_from_template (gst_static_pad_template_get
	(&gst_auparse_src_template), "src");
	gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
	gst_pad_use_explicit_caps (auparse->srcpad);

	auparse->offset = 0;
	auparse->size = 0;
	auparse->encoding = 0;
	auparse->frequency = 0;
	auparse->channels = 0;
	}

	static void
	gst_auparse_chain (GstPad * pad, GstData * _data)
	{
	GstBuffer *buf = GST_BUFFER (_data);
	GstAuParse *auparse;
	gchar *data;
	glong size;
	GstCaps *tempcaps;
	gint law, depth;
	gboolean sign;

	g_return_if_fail (pad != NULL);
	g_return_if_fail (GST_IS_PAD (pad));
	g_return_if_fail (buf != NULL);

	auparse = GST_AUPARSE (gst_pad_get_parent (pad));

	GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
	gst_element_get_name (GST_ELEMENT (auparse)));

	data = GST_BUFFER_DATA (buf);
	size = GST_BUFFER_SIZE (buf);

	/* if we haven't seen any data yet... */
	if (auparse->size == 0) {
	GstBuffer *newbuf;
	guint32 head = (guint32 ) data;

	/* normal format is big endian (au is a Sparc format) */
	if (GUINT32_FROM_BE (*head) == 0x2e736e64) {
	head++;
	auparse->le = 0;
	auparse->offset = GUINT32_FROM_BE (*head);
	head++;
	auparse->size = GUINT32_FROM_BE (*head);
	head++;
	auparse->encoding = GUINT32_FROM_BE (*head);
	head++;
	auparse->frequency = GUINT32_FROM_BE (*head);
	head++;
	auparse->channels = GUINT32_FROM_BE (*head);
	head++;

	/* and of course, someone had to invent a little endian
	* version. Used by DEC systems. */
	} else if (GUINT32_FROM_LE (*head) == 0x0064732E) {
	auparse->le = 1;
	head++;
	auparse->le = 0;
	auparse->offset = GUINT32_FROM_LE (*head);
	head++;
	auparse->size = GUINT32_FROM_LE (*head);
	head++;
	auparse->encoding = GUINT32_FROM_LE (*head);
	head++;
	auparse->frequency = GUINT32_FROM_LE (*head);
	head++;
	auparse->channels = GUINT32_FROM_LE (*head);
	head++;

	} else {
	g_warning ("help, dunno what I'm looking at!\n");
	gst_buffer_unref (buf);
	return;
	}

	g_print
	("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
	auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
	auparse->channels);
	GST_DEBUG
	("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
	auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
	auparse->channels);

	switch (auparse->encoding) {
	case 1:
	law = 1;
	depth = 8;
	sign = FALSE;
	break;
	case 2:
	law = 0;
	depth = 8;
	sign = FALSE;
	break;
	case 3:
	law = 0;
	depth = 16;
	sign = TRUE;
	break;
	default:
	g_warning ("help!, dont know how to deal with this format yet\n");
	return;
	}

	if (law) {
	tempcaps = gst_caps_new_simple ("audio/x-alaw",
	"rate", G_TYPE_INT, auparse->frequency,
	"channels", G_TYPE_INT, auparse->channels, NULL);
	} else {
	tempcaps = gst_caps_new_simple ("audio/x-raw-int",
	"endianness", G_TYPE_INT, G_BIG_ENDIAN,
	"rate", G_TYPE_INT, auparse->frequency,
	"channels", G_TYPE_INT, auparse->channels,
	"depth", G_TYPE_INT, depth,
	"width", G_TYPE_INT, depth, "signed", G_TYPE_BOOLEAN, sign, NULL);
	}

	if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
	gst_buffer_unref (buf);
	return;
	}

	newbuf = gst_buffer_new ();
	GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
	memcpy (GST_BUFFER_DATA (newbuf), data + 24, size - (auparse->offset));
	GST_BUFFER_SIZE (newbuf) = size - (auparse->offset);

	gst_buffer_unref (buf);

	gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
	return;
	}

	gst_pad_push (auparse->srcpad, GST_DATA (buf));
	}


	static gboolean
	plugin_init (GstPlugin * plugin)
	{
	if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
	GST_TYPE_AUPARSE)) {
	return FALSE;
	}

	return TRUE;
	}

	GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
	GST_VERSION_MINOR,
	"auparse",
	"parses au streams", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)