gst/rawparse/gstaudioparse.c - mtk-gst-plugins-bad-debian - Git at Google

 /* GStreamer
  * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
  *
  * gstaudioparse.c:
  *
  * 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., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 /**
  * SECTION:element-audioparse
  *
  * Converts a byte stream into audio frames.
  */

 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif

 /* FIXME 0.11: suppress warnings for deprecated API such as g_value_array stuff
  * for now with newer GLib versions (>= 2.31.0) */
 #define GLIB_DISABLE_DEPRECATION_WARNINGS

 #include "gstaudioparse.h"

 #include <string.h>

 typedef enum
 {
   GST_AUDIO_PARSE_FORMAT_RAW,
   GST_AUDIO_PARSE_FORMAT_MULAW,
   GST_AUDIO_PARSE_FORMAT_ALAW
 } GstAudioParseFormat;

 typedef enum
 {
   GST_AUDIO_PARSE_ENDIANNESS_LITTLE = 1234,
   GST_AUDIO_PARSE_ENDIANNESS_BIG = 4321
 } GstAudioParseEndianness;

 static void gst_audio_parse_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec);
 static void gst_audio_parse_get_property (GObject * object, guint prop_id,
     GValue * value, GParamSpec * pspec);
 static void gst_audio_parse_finalize (GObject * object);

 static GstCaps *gst_audio_parse_get_caps (GstRawParse * rp);

 static void gst_audio_parse_update_frame_size (GstAudioParse * ap);

 GST_DEBUG_CATEGORY_STATIC (gst_audio_parse_debug);
 #define GST_CAT_DEFAULT gst_audio_parse_debug

 enum
 {
   PROP_0,
   PROP_FORMAT,
   PROP_RAW_FORMAT,
   PROP_RATE,
   PROP_CHANNELS,
   PROP_INTERLEAVED,
   PROP_CHANNEL_POSITIONS,
   PROP_USE_SINK_CAPS
 };

 #define GST_AUDIO_PARSE_FORMAT (gst_audio_parse_format_get_type ())
 static GType
 gst_audio_parse_format_get_type (void)
 {
   static GType audio_parse_format_type = 0;
   static const GEnumValue format_types[] = {
     {GST_AUDIO_PARSE_FORMAT_RAW, "Raw", "raw"},
     {GST_AUDIO_PARSE_FORMAT_ALAW, "A-Law", "alaw"},
     {GST_AUDIO_PARSE_FORMAT_MULAW, "\302\265-Law", "mulaw"},
     {0, NULL, NULL}
   };

   if (!audio_parse_format_type) {
     audio_parse_format_type =
         g_enum_register_static ("GstAudioParseFormat", format_types);
   }

   return audio_parse_format_type;
 }


 #define gst_audio_parse_parent_class parent_class
 G_DEFINE_TYPE (GstAudioParse, gst_audio_parse, GST_TYPE_RAW_PARSE);

 static void
 gst_audio_parse_class_init (GstAudioParseClass * klass)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
   GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
   GstRawParseClass *rp_class = GST_RAW_PARSE_CLASS (klass);
   GstCaps *caps;

   gobject_class->set_property = gst_audio_parse_set_property;
   gobject_class->get_property = gst_audio_parse_get_property;
   gobject_class->finalize = gst_audio_parse_finalize;

   rp_class->get_caps = gst_audio_parse_get_caps;

   g_object_class_install_property (gobject_class, PROP_FORMAT,
       g_param_spec_enum ("format", "Format",
           "Format of audio samples in raw stream", GST_AUDIO_PARSE_FORMAT,
           GST_AUDIO_PARSE_FORMAT_RAW,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_RAW_FORMAT,
       g_param_spec_enum ("raw-format", "Raw Format",
           "Format of audio samples in raw stream", GST_TYPE_AUDIO_FORMAT,
           GST_AUDIO_FORMAT_S16, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_RATE,
       g_param_spec_int ("rate", "Rate", "Rate of audio samples in raw stream",
           1, INT_MAX, 44100, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_CHANNELS,
       g_param_spec_int ("channels", "Channels",
           "Number of channels in raw stream", 1, 64, 2,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_INTERLEAVED,
       g_param_spec_boolean ("interleaved", "Interleaved Layout",
           "True if audio has interleaved layout", TRUE,
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_CHANNEL_POSITIONS,
       g_param_spec_value_array ("channel-positions", "Channel positions",
           "Channel positions used on the output",
           g_param_spec_enum ("channel-position", "Channel position",
               "Channel position of the n-th input",
               GST_TYPE_AUDIO_CHANNEL_POSITION,
               GST_AUDIO_CHANNEL_POSITION_NONE,
               G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS),
           G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_USE_SINK_CAPS,
       g_param_spec_boolean ("use-sink-caps", "Use sink caps",
           "Use the sink caps for the format, only performing timestamping",
           FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   gst_element_class_set_static_metadata (gstelement_class, "Audio Parse",
       "Filter/Audio",
       "Converts stream into audio frames",
       "Sebastian Dröge <sebastian.droege@collabora.co.uk>");

   caps = gst_caps_from_string (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL)
       ", layout = (string) { interleaved, non-interleaved }; "
       "audio/x-alaw, rate=(int)[1,MAX], channels=(int)[1,MAX]; "
       "audio/x-mulaw, rate=(int)[1,MAX], channels=(int)[1,MAX]");

   gst_raw_parse_class_set_src_pad_template (rp_class, caps);
   gst_raw_parse_class_set_multiple_frames_per_buffer (rp_class, TRUE);
   gst_caps_unref (caps);

   GST_DEBUG_CATEGORY_INIT (gst_audio_parse_debug, "audioparse", 0,
       "audioparse element");
 }

 static void
 gst_audio_parse_init (GstAudioParse * ap)
 {
   ap->format = GST_AUDIO_PARSE_FORMAT_RAW;
   ap->raw_format = GST_AUDIO_FORMAT_S16;
   ap->channels = 2;
   ap->interleaved = TRUE;

   gst_audio_parse_update_frame_size (ap);
   gst_raw_parse_set_fps (GST_RAW_PARSE (ap), 44100, 1);
 }

 static void
 gst_audio_parse_set_property (GObject * object, guint prop_id,
     const GValue * value, GParamSpec * pspec)
 {
   GstAudioParse *ap = GST_AUDIO_PARSE (object);

   g_return_if_fail (!gst_raw_parse_is_negotiated (GST_RAW_PARSE (ap)));

   switch (prop_id) {
     case PROP_FORMAT:
       ap->format = g_value_get_enum (value);
       break;
     case PROP_RAW_FORMAT:
       ap->raw_format = g_value_get_enum (value);
       break;
     case PROP_RATE:
       gst_raw_parse_set_fps (GST_RAW_PARSE (ap), g_value_get_int (value), 1);
       break;
     case PROP_CHANNELS:
       ap->channels = g_value_get_int (value);
       break;
     case PROP_INTERLEAVED:
       ap->interleaved = g_value_get_boolean (value);
       break;
     case PROP_CHANNEL_POSITIONS:
       if (ap->channel_positions)
         g_value_array_free (ap->channel_positions);

       ap->channel_positions = g_value_dup_boxed (value);
       break;
     case PROP_USE_SINK_CAPS:
       ap->use_sink_caps = g_value_get_boolean (value);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }

   gst_audio_parse_update_frame_size (ap);
 }

 static void
 gst_audio_parse_get_property (GObject * object, guint prop_id, GValue * value,
     GParamSpec * pspec)
 {
   GstAudioParse *ap = GST_AUDIO_PARSE (object);

   switch (prop_id) {
     case PROP_FORMAT:
       g_value_set_enum (value, ap->format);
       break;
     case PROP_RAW_FORMAT:
       g_value_set_enum (value, ap->raw_format);
       break;
     case PROP_RATE:{
       gint fps_n, fps_d;

       gst_raw_parse_get_fps (GST_RAW_PARSE (ap), &fps_n, &fps_d);
       g_value_set_int (value, fps_n);
       break;
     }
     case PROP_CHANNELS:
       g_value_set_int (value, ap->channels);
       break;
     case PROP_INTERLEAVED:
       g_value_set_boolean (value, ap->interleaved);
       break;
     case PROP_CHANNEL_POSITIONS:
       g_value_set_boxed (value, ap->channel_positions);
       break;
     case PROP_USE_SINK_CAPS:
       g_value_set_boolean (value, ap->use_sink_caps);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
   }
 }

 static void
 gst_audio_parse_finalize (GObject * object)
 {
   GstAudioParse *ap = GST_AUDIO_PARSE (object);

   if (ap->channel_positions) {
     g_value_array_free (ap->channel_positions);
     ap->channel_positions = NULL;
   }

   g_free (ap->channel_pos);
   g_free (ap->channel_order);

   G_OBJECT_CLASS (parent_class)->finalize (object);
 }

 void
 gst_audio_parse_update_frame_size (GstAudioParse * ap)
 {
   gint framesize, width;

   switch (ap->format) {
     case GST_AUDIO_PARSE_FORMAT_ALAW:
     case GST_AUDIO_PARSE_FORMAT_MULAW:
       width = 8;
       break;
     case GST_AUDIO_PARSE_FORMAT_RAW:
     default:
     {
       GstAudioInfo info;

       gst_audio_info_init (&info);
       /* rate, etc do not really matter here */
       gst_audio_info_set_format (&info, ap->raw_format, 44100, ap->channels,
           NULL);
       width = GST_AUDIO_INFO_WIDTH (&info);
       break;
     }
   }

   framesize = (width / 8) * ap->channels;

   gst_raw_parse_set_framesize (GST_RAW_PARSE (ap), framesize);
 }

 static GstAudioChannelPosition *
 gst_audio_parse_get_channel_positions (GValueArray * positions)
 {
   gint i;
   guint channels;
   GstAudioChannelPosition *pos;

   channels = positions->n_values;
   pos = g_new (GstAudioChannelPosition, positions->n_values);

   for (i = 0; i < channels; i++) {
     GValue *v = g_value_array_get_nth (positions, i);

     pos[i] = g_value_get_enum (v);
   }

   return pos;
 }

 static void
 gst_audio_parse_setup_channel_positions (GstAudioParse * ap)
 {
   GstAudioChannelPosition *pos, *to;

   g_free (ap->channel_pos);
   g_free (ap->channel_order);
   ap->channel_pos = NULL;
   ap->channel_order = NULL;

   if (!ap->channel_positions) {
     GST_DEBUG_OBJECT (ap, "no channel positions");
     /* implicit mapping for 1- and 2-channel audio is okay */
     /* will come up with one in other cases also */
     return;
   }

   pos = gst_audio_parse_get_channel_positions (ap->channel_positions);
   if (ap->channels != ap->channel_positions->n_values ||
       !gst_audio_check_valid_channel_positions (pos, ap->channels, FALSE)) {
     GST_DEBUG_OBJECT (ap, "invalid channel position");
     g_free (pos);
     return;
   }

   /* ok, got something we can work with now */
   to = g_new (GstAudioChannelPosition, ap->channels);
   memcpy (to, pos, ap->channels * sizeof (to[0]));
   gst_audio_channel_positions_to_valid_order (to, ap->channels);

   ap->channel_pos = pos;
   ap->channel_order = to;
 }

 static GstCaps *
 gst_audio_parse_get_caps (GstRawParse * rp)
 {
   GstAudioParse *ap = GST_AUDIO_PARSE (rp);
   GstCaps *caps, *ncaps;
   GstAudioInfo info;
   gint fps_n, fps_d;
   const GValue *val;

   if (ap->use_sink_caps) {
     gint rate;
     GstCaps *caps = gst_pad_get_current_caps (rp->sinkpad);
     if (!caps) {
       GST_WARNING_OBJECT (ap,
           "Sink pad has no caps, but we were asked to use its caps");
       return NULL;
     }
     if (!gst_audio_info_from_caps (&info, caps)) {
       GST_WARNING_OBJECT (ap, "Failed to parse caps %" GST_PTR_FORMAT, caps);
       gst_caps_unref (caps);
       return NULL;
     }

     ap->format = GST_AUDIO_PARSE_FORMAT_RAW;
     ap->raw_format = GST_AUDIO_INFO_FORMAT (&info);
     ap->channels = GST_AUDIO_INFO_CHANNELS (&info);
     ap->interleaved = info.layout == GST_AUDIO_LAYOUT_INTERLEAVED;

     rate = GST_AUDIO_INFO_RATE (&info);
     gst_raw_parse_set_fps (GST_RAW_PARSE (ap), rate, 1);
     gst_audio_parse_update_frame_size (ap);

     return caps;
   }

   gst_raw_parse_get_fps (rp, &fps_n, &fps_d);
   gst_audio_parse_setup_channel_positions (ap);

   /* yes, even when format not raw */
   gst_audio_info_init (&info);
   gst_audio_info_set_format (&info, ap->raw_format, fps_n, ap->channels,
       ap->channel_order);
   info.layout = ap->interleaved ? GST_AUDIO_LAYOUT_INTERLEAVED :
       GST_AUDIO_LAYOUT_NON_INTERLEAVED;
   caps = gst_audio_info_to_caps (&info);

   switch (ap->format) {
     case GST_AUDIO_PARSE_FORMAT_RAW:
       break;
     case GST_AUDIO_PARSE_FORMAT_ALAW:
       ncaps = gst_caps_new_simple ("audio/x-alaw",
           "rate", G_TYPE_INT, fps_n,
           "channels", G_TYPE_INT, ap->channels, NULL);
       /* pick mask stuff from faked raw format */
       val = gst_structure_get_value (gst_caps_get_structure (caps, 0),
           "channel-mask");
       if (val)
         gst_caps_set_value (ncaps, "channel-mask", val);
       gst_caps_unref (caps);
       caps = ncaps;
       break;
     case GST_AUDIO_PARSE_FORMAT_MULAW:
       ncaps = gst_caps_new_simple ("audio/x-mulaw",
           "rate", G_TYPE_INT, fps_n,
           "channels", G_TYPE_INT, ap->channels, NULL);
       /* pick mask stuff from faked raw format */
       val = gst_structure_get_value (gst_caps_get_structure (caps, 0),
           "channel-mask");
       if (val)
         gst_caps_set_value (ncaps, "channel-mask", val);
       gst_caps_unref (caps);
       caps = ncaps;
       break;
     default:
       caps = gst_caps_new_empty ();
       GST_ERROR_OBJECT (rp, "unexpected format %d", ap->format);
       break;
   }

   return caps;
 }
	/* GStreamer
	* Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org>
	*
	* gstaudioparse.c:
	*
	* 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., 51 Franklin St, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/
	/**
	* SECTION:element-audioparse
	*
	* Converts a byte stream into audio frames.
	*/

	#ifdef HAVE_CONFIG_H
	# include "config.h"
	#endif

	/* FIXME 0.11: suppress warnings for deprecated API such as g_value_array stuff
	* for now with newer GLib versions (>= 2.31.0) */
	#define GLIB_DISABLE_DEPRECATION_WARNINGS

	#include "gstaudioparse.h"

	#include <string.h>

	typedef enum
	{
	GST_AUDIO_PARSE_FORMAT_RAW,
	GST_AUDIO_PARSE_FORMAT_MULAW,
	GST_AUDIO_PARSE_FORMAT_ALAW
	} GstAudioParseFormat;

	typedef enum
	{
	GST_AUDIO_PARSE_ENDIANNESS_LITTLE = 1234,
	GST_AUDIO_PARSE_ENDIANNESS_BIG = 4321
	} GstAudioParseEndianness;

	static void gst_audio_parse_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec);
	static void gst_audio_parse_get_property (GObject * object, guint prop_id,
	GValue * value, GParamSpec * pspec);
	static void gst_audio_parse_finalize (GObject * object);

	static GstCaps gst_audio_parse_get_caps (GstRawParse rp);

	static void gst_audio_parse_update_frame_size (GstAudioParse * ap);

	GST_DEBUG_CATEGORY_STATIC (gst_audio_parse_debug);
	#define GST_CAT_DEFAULT gst_audio_parse_debug

	enum
	{
	PROP_0,
	PROP_FORMAT,
	PROP_RAW_FORMAT,
	PROP_RATE,
	PROP_CHANNELS,
	PROP_INTERLEAVED,
	PROP_CHANNEL_POSITIONS,
	PROP_USE_SINK_CAPS
	};

	#define GST_AUDIO_PARSE_FORMAT (gst_audio_parse_format_get_type ())
	static GType
	gst_audio_parse_format_get_type (void)
	{
	static GType audio_parse_format_type = 0;
	static const GEnumValue format_types[] = {
	{GST_AUDIO_PARSE_FORMAT_RAW, "Raw", "raw"},
	{GST_AUDIO_PARSE_FORMAT_ALAW, "A-Law", "alaw"},
	{GST_AUDIO_PARSE_FORMAT_MULAW, "\302\265-Law", "mulaw"},
	{0, NULL, NULL}
	};

	if (!audio_parse_format_type) {
	audio_parse_format_type =
	g_enum_register_static ("GstAudioParseFormat", format_types);
	}

	return audio_parse_format_type;
	}


	#define gst_audio_parse_parent_class parent_class
	G_DEFINE_TYPE (GstAudioParse, gst_audio_parse, GST_TYPE_RAW_PARSE);

	static void
	gst_audio_parse_class_init (GstAudioParseClass * klass)
	{
	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
	GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
	GstRawParseClass *rp_class = GST_RAW_PARSE_CLASS (klass);
	GstCaps *caps;

	gobject_class->set_property = gst_audio_parse_set_property;
	gobject_class->get_property = gst_audio_parse_get_property;
	gobject_class->finalize = gst_audio_parse_finalize;

	rp_class->get_caps = gst_audio_parse_get_caps;

	g_object_class_install_property (gobject_class, PROP_FORMAT,
	g_param_spec_enum ("format", "Format",
	"Format of audio samples in raw stream", GST_AUDIO_PARSE_FORMAT,
	GST_AUDIO_PARSE_FORMAT_RAW,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_RAW_FORMAT,
	g_param_spec_enum ("raw-format", "Raw Format",
	"Format of audio samples in raw stream", GST_TYPE_AUDIO_FORMAT,
	GST_AUDIO_FORMAT_S16, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_RATE,
	g_param_spec_int ("rate", "Rate", "Rate of audio samples in raw stream",
	1, INT_MAX, 44100, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_CHANNELS,
	g_param_spec_int ("channels", "Channels",
	"Number of channels in raw stream", 1, 64, 2,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_INTERLEAVED,
	g_param_spec_boolean ("interleaved", "Interleaved Layout",
	"True if audio has interleaved layout", TRUE,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_CHANNEL_POSITIONS,
	g_param_spec_value_array ("channel-positions", "Channel positions",
	"Channel positions used on the output",
	g_param_spec_enum ("channel-position", "Channel position",
	"Channel position of the n-th input",
	GST_TYPE_AUDIO_CHANNEL_POSITION,
	GST_AUDIO_CHANNEL_POSITION_NONE,
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS),
	G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	g_object_class_install_property (gobject_class, PROP_USE_SINK_CAPS,
	g_param_spec_boolean ("use-sink-caps", "Use sink caps",
	"Use the sink caps for the format, only performing timestamping",
	FALSE, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	gst_element_class_set_static_metadata (gstelement_class, "Audio Parse",
	"Filter/Audio",
	"Converts stream into audio frames",
	"Sebastian Dröge <sebastian.droege@collabora.co.uk>");

	caps = gst_caps_from_string (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL)
	", layout = (string) { interleaved, non-interleaved }; "
	"audio/x-alaw, rate=(int)[1,MAX], channels=(int)[1,MAX]; "
	"audio/x-mulaw, rate=(int)[1,MAX], channels=(int)[1,MAX]");

	gst_raw_parse_class_set_src_pad_template (rp_class, caps);
	gst_raw_parse_class_set_multiple_frames_per_buffer (rp_class, TRUE);
	gst_caps_unref (caps);

	GST_DEBUG_CATEGORY_INIT (gst_audio_parse_debug, "audioparse", 0,
	"audioparse element");
	}

	static void
	gst_audio_parse_init (GstAudioParse * ap)
	{
	ap->format = GST_AUDIO_PARSE_FORMAT_RAW;
	ap->raw_format = GST_AUDIO_FORMAT_S16;
	ap->channels = 2;
	ap->interleaved = TRUE;

	gst_audio_parse_update_frame_size (ap);
	gst_raw_parse_set_fps (GST_RAW_PARSE (ap), 44100, 1);
	}

	static void
	gst_audio_parse_set_property (GObject * object, guint prop_id,
	const GValue * value, GParamSpec * pspec)
	{
	GstAudioParse *ap = GST_AUDIO_PARSE (object);

	g_return_if_fail (!gst_raw_parse_is_negotiated (GST_RAW_PARSE (ap)));

	switch (prop_id) {
	case PROP_FORMAT:
	ap->format = g_value_get_enum (value);
	break;
	case PROP_RAW_FORMAT:
	ap->raw_format = g_value_get_enum (value);
	break;
	case PROP_RATE:
	gst_raw_parse_set_fps (GST_RAW_PARSE (ap), g_value_get_int (value), 1);
	break;
	case PROP_CHANNELS:
	ap->channels = g_value_get_int (value);
	break;
	case PROP_INTERLEAVED:
	ap->interleaved = g_value_get_boolean (value);
	break;
	case PROP_CHANNEL_POSITIONS:
	if (ap->channel_positions)
	g_value_array_free (ap->channel_positions);

	ap->channel_positions = g_value_dup_boxed (value);
	break;
	case PROP_USE_SINK_CAPS:
	ap->use_sink_caps = g_value_get_boolean (value);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}

	gst_audio_parse_update_frame_size (ap);
	}

	static void
	gst_audio_parse_get_property (GObject * object, guint prop_id, GValue * value,
	GParamSpec * pspec)
	{
	GstAudioParse *ap = GST_AUDIO_PARSE (object);

	switch (prop_id) {
	case PROP_FORMAT:
	g_value_set_enum (value, ap->format);
	break;
	case PROP_RAW_FORMAT:
	g_value_set_enum (value, ap->raw_format);
	break;
	case PROP_RATE:{
	gint fps_n, fps_d;

	gst_raw_parse_get_fps (GST_RAW_PARSE (ap), &fps_n, &fps_d);
	g_value_set_int (value, fps_n);
	break;
	}
	case PROP_CHANNELS:
	g_value_set_int (value, ap->channels);
	break;
	case PROP_INTERLEAVED:
	g_value_set_boolean (value, ap->interleaved);
	break;
	case PROP_CHANNEL_POSITIONS:
	g_value_set_boxed (value, ap->channel_positions);
	break;
	case PROP_USE_SINK_CAPS:
	g_value_set_boolean (value, ap->use_sink_caps);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
	break;
	}
	}

	static void
	gst_audio_parse_finalize (GObject * object)
	{
	GstAudioParse *ap = GST_AUDIO_PARSE (object);

	if (ap->channel_positions) {
	g_value_array_free (ap->channel_positions);
	ap->channel_positions = NULL;
	}

	g_free (ap->channel_pos);
	g_free (ap->channel_order);

	G_OBJECT_CLASS (parent_class)->finalize (object);
	}

	void
	gst_audio_parse_update_frame_size (GstAudioParse * ap)
	{
	gint framesize, width;

	switch (ap->format) {
	case GST_AUDIO_PARSE_FORMAT_ALAW:
	case GST_AUDIO_PARSE_FORMAT_MULAW:
	width = 8;
	break;
	case GST_AUDIO_PARSE_FORMAT_RAW:
	default:
	{
	GstAudioInfo info;

	gst_audio_info_init (&info);
	/* rate, etc do not really matter here */
	gst_audio_info_set_format (&info, ap->raw_format, 44100, ap->channels,
	NULL);
	width = GST_AUDIO_INFO_WIDTH (&info);
	break;
	}
	}

	framesize = (width / 8) * ap->channels;

	gst_raw_parse_set_framesize (GST_RAW_PARSE (ap), framesize);
	}

	static GstAudioChannelPosition *
	gst_audio_parse_get_channel_positions (GValueArray * positions)
	{
	gint i;
	guint channels;
	GstAudioChannelPosition *pos;

	channels = positions->n_values;
	pos = g_new (GstAudioChannelPosition, positions->n_values);

	for (i = 0; i < channels; i++) {
	GValue *v = g_value_array_get_nth (positions, i);

	pos[i] = g_value_get_enum (v);
	}

	return pos;
	}

	static void
	gst_audio_parse_setup_channel_positions (GstAudioParse * ap)
	{
	GstAudioChannelPosition pos, to;

	g_free (ap->channel_pos);
	g_free (ap->channel_order);
	ap->channel_pos = NULL;
	ap->channel_order = NULL;

	if (!ap->channel_positions) {
	GST_DEBUG_OBJECT (ap, "no channel positions");
	/* implicit mapping for 1- and 2-channel audio is okay */
	/* will come up with one in other cases also */
	return;
	}

	pos = gst_audio_parse_get_channel_positions (ap->channel_positions);
	if (ap->channels != ap->channel_positions->n_values \|\|
	!gst_audio_check_valid_channel_positions (pos, ap->channels, FALSE)) {
	GST_DEBUG_OBJECT (ap, "invalid channel position");
	g_free (pos);
	return;
	}

	/* ok, got something we can work with now */
	to = g_new (GstAudioChannelPosition, ap->channels);
	memcpy (to, pos, ap->channels * sizeof (to[0]));
	gst_audio_channel_positions_to_valid_order (to, ap->channels);

	ap->channel_pos = pos;
	ap->channel_order = to;
	}

	static GstCaps *
	gst_audio_parse_get_caps (GstRawParse * rp)
	{
	GstAudioParse *ap = GST_AUDIO_PARSE (rp);
	GstCaps caps, ncaps;
	GstAudioInfo info;
	gint fps_n, fps_d;
	const GValue *val;

	if (ap->use_sink_caps) {
	gint rate;
	GstCaps *caps = gst_pad_get_current_caps (rp->sinkpad);
	if (!caps) {
	GST_WARNING_OBJECT (ap,
	"Sink pad has no caps, but we were asked to use its caps");
	return NULL;
	}
	if (!gst_audio_info_from_caps (&info, caps)) {
	GST_WARNING_OBJECT (ap, "Failed to parse caps %" GST_PTR_FORMAT, caps);
	gst_caps_unref (caps);
	return NULL;
	}

	ap->format = GST_AUDIO_PARSE_FORMAT_RAW;
	ap->raw_format = GST_AUDIO_INFO_FORMAT (&info);
	ap->channels = GST_AUDIO_INFO_CHANNELS (&info);
	ap->interleaved = info.layout == GST_AUDIO_LAYOUT_INTERLEAVED;

	rate = GST_AUDIO_INFO_RATE (&info);
	gst_raw_parse_set_fps (GST_RAW_PARSE (ap), rate, 1);
	gst_audio_parse_update_frame_size (ap);

	return caps;
	}

	gst_raw_parse_get_fps (rp, &fps_n, &fps_d);
	gst_audio_parse_setup_channel_positions (ap);

	/* yes, even when format not raw */
	gst_audio_info_init (&info);
	gst_audio_info_set_format (&info, ap->raw_format, fps_n, ap->channels,
	ap->channel_order);
	info.layout = ap->interleaved ? GST_AUDIO_LAYOUT_INTERLEAVED :
	GST_AUDIO_LAYOUT_NON_INTERLEAVED;
	caps = gst_audio_info_to_caps (&info);

	switch (ap->format) {
	case GST_AUDIO_PARSE_FORMAT_RAW:
	break;
	case GST_AUDIO_PARSE_FORMAT_ALAW:
	ncaps = gst_caps_new_simple ("audio/x-alaw",
	"rate", G_TYPE_INT, fps_n,
	"channels", G_TYPE_INT, ap->channels, NULL);
	/* pick mask stuff from faked raw format */
	val = gst_structure_get_value (gst_caps_get_structure (caps, 0),
	"channel-mask");
	if (val)
	gst_caps_set_value (ncaps, "channel-mask", val);
	gst_caps_unref (caps);
	caps = ncaps;
	break;
	case GST_AUDIO_PARSE_FORMAT_MULAW:
	ncaps = gst_caps_new_simple ("audio/x-mulaw",
	"rate", G_TYPE_INT, fps_n,
	"channels", G_TYPE_INT, ap->channels, NULL);
	/* pick mask stuff from faked raw format */
	val = gst_structure_get_value (gst_caps_get_structure (caps, 0),
	"channel-mask");
	if (val)
	gst_caps_set_value (ncaps, "channel-mask", val);
	gst_caps_unref (caps);
	caps = ncaps;
	break;
	default:
	caps = gst_caps_new_empty ();
	GST_ERROR_OBJECT (rp, "unexpected format %d", ap->format);
	break;
	}

	return caps;
	}