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gstreamer/gst/auparse/gstauparse.c
Stéphane Loeuillet ec8a1bb76c first batch : remove ',' at end of enums as they could confuse older gcc, foreign compilers (forte) and gtk-doc 
Original commit message from CVS:

first batch :
remove ',' at end of enums as they could confuse older gcc, foreign compilers (forte) and gtk-doc
2004-05-21 22:39:30 +00:00

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/* 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/Demuxer/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_SOMETIMES, /* FIXME: spider */
GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; " /* 24-bit PCM is barely supported by gstreamer actually */
GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS "; " /* 64-bit float is barely supported by gstreamer actually */
"audio/x-alaw, " "rate = (int) [ 8000, 192000 ], "
"channels = (int) [ 1, 2 ]" "; " "audio/x-mulaw, "
"rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]" "; "
/* Nothing to decode those ADPCM streams for now */
"audio/x-adpcm, " "layout = (string) { g721, g722, g723_3, g723_5 }")
);
/* 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 GstElementStateReturn gst_auparse_change_state (GstElement * element);
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);
gstelement_class->change_state = gst_auparse_change_state;
}
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 = NULL;
#if 0 /* FIXME: spider */
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);
#endif
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 = 0, depth = 0, ieee = 0;
gchar layout[7];
layout[0] = 0;
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 (GST_READ_UINT32_BE (head) == 0x2e736e64) { /* ".snd" */
head++;
auparse->le = 0;
auparse->offset = GST_READ_UINT32_BE (head);
head++;
/* Do not trust size, could be set to -1 : unknown */
auparse->size = GST_READ_UINT32_BE (head);
head++;
auparse->encoding = GST_READ_UINT32_BE (head);
head++;
auparse->frequency = GST_READ_UINT32_BE (head);
head++;
auparse->channels = GST_READ_UINT32_BE (head);
head++;
/* and of course, someone had to invent a little endian
* version. Used by DEC systems. */
} else if (GST_READ_UINT32_LE (head) == 0x0064732E) { /* other source say it is "dns." */
head++;
auparse->le = 1;
auparse->offset = GST_READ_UINT32_LE (head);
head++;
/* Do not trust size, could be set to -1 : unknown */
auparse->size = GST_READ_UINT32_LE (head);
head++;
auparse->encoding = GST_READ_UINT32_LE (head);
head++;
auparse->frequency = GST_READ_UINT32_LE (head);
head++;
auparse->channels = GST_READ_UINT32_LE (head);
head++;
} else {
g_warning ("help, dunno what I'm looking at!\n");
gst_buffer_unref (buf);
return;
}
GST_DEBUG
("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
auparse->channels);
/*
Docs :
http://www.opengroup.org/public/pubs/external/auformat.html
http://astronomy.swin.edu.au/~pbourke/dataformats/au/
Solaris headers : /usr/include/audio/au.h
libsndfile : src/au.c
Samples :
http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
*/
switch (auparse->encoding) {
case 1: /* 8-bit ISDN mu-law G.711 */
law = 1;
depth = 8;
break;
case 27: /* 8-bit ISDN A-law G.711 */
law = 2;
depth = 8;
break;
case 2: /* 8-bit linear PCM */
depth = 8;
break;
case 3: /* 16-bit linear PCM */
depth = 16;
break;
case 4: /* 24-bit linear PCM */
depth = 24;
break;
case 5: /* 32-bit linear PCM */
depth = 32;
break;
case 6: /* 32-bit IEEE floating point */
ieee = 1;
depth = 32;
break;
case 7: /* 64-bit IEEE floating point */
ieee = 1;
depth = 64;
break;
case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
strcpy (layout, "g721");
break;
case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
strcpy (layout, "g722");
break;
case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
strcpy (layout, "g723_3");
break;
case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
strcpy (layout, "g723_5");
break;
case 8: /* Fragmented sample data */
case 9: /* AU_ENCODING_NESTED */
case 10: /* DSP program */
case 11: /* DSP 8-bit fixed point */
case 12: /* DSP 16-bit fixed point */
case 13: /* DSP 24-bit fixed point */
case 14: /* DSP 32-bit fixed point */
case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
case 17: /* AU_ENCODING_MULAW_SQUELCH */
case 18: /* 16-bit linear with emphasis */
case 19: /* 16-bit linear compressed (NeXT) */
case 20: /* 16-bit linear with emphasis and compression */
case 21: /* Music kit DSP commands */
case 22: /* Music kit DSP commands samples */
default:
GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
gst_buffer_unref (buf);
return;
}
auparse->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_auparse_src_template), "src");
gst_pad_use_explicit_caps (auparse->srcpad);
if (law) {
tempcaps =
gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
"rate", G_TYPE_INT, auparse->frequency, "channels", G_TYPE_INT,
auparse->channels, NULL);
} else if (ieee) {
tempcaps = gst_caps_new_simple ("audio/x-raw-float",
"width", G_TYPE_INT, depth,
"endianness", G_TYPE_INT,
auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, NULL);
} else if (layout[0]) {
tempcaps = gst_caps_new_simple ("audio/x-adpcm",
"layout", G_TYPE_STRING, layout, NULL);
} else {
tempcaps = gst_caps_new_simple ("audio/x-raw-int",
"endianness", G_TYPE_INT,
auparse->le ? G_LITTLE_ENDIAN : 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, TRUE, NULL);
}
if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
gst_buffer_unref (buf);
gst_object_unref (GST_OBJECT (auparse->srcpad));
auparse->srcpad = NULL;
return;
}
gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
newbuf = gst_buffer_new ();
GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
memcpy (GST_BUFFER_DATA (newbuf), data + (auparse->offset),
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 GstElementStateReturn
gst_auparse_change_state (GstElement * element)
{
GstAuParse *auparse = GST_AUPARSE (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_READY:
if (auparse->srcpad) {
gst_element_remove_pad (element, auparse->srcpad);
auparse->srcpad = NULL;
}
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
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)
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