Commit ace2a844 authored by Wim Taymans's avatar Wim Taymans

celtdepay: add CELT depayloader

parent ec554a7f
......@@ -6,6 +6,7 @@ libgstrtp_la_SOURCES = \
gstrtpchannels.c \
gstrtpdepay.c \
gstrtpac3depay.c \
gstrtpceltdepay.c \
gstrtpceltpay.c \
gstrtpdvdepay.c \
gstrtpdvpay.c \
......
......@@ -23,6 +23,7 @@
#include "gstrtpdepay.h"
#include "gstrtpac3depay.h"
#include "gstrtpceltdepay.h"
#include "gstrtpceltpay.h"
#include "gstrtpdvdepay.h"
#include "gstrtpdvpay.h"
......@@ -87,6 +88,9 @@ plugin_init (GstPlugin * plugin)
if (!gst_rtp_ac3_depay_plugin_init (plugin))
return FALSE;
if (!gst_rtp_celt_depay_plugin_init (plugin))
return FALSE;
if (!gst_rtp_celt_pay_plugin_init (plugin))
return FALSE;
......
/* GStreamer
* Copyright (C) <2009> Wim Taymans <wim.taymans@gmail.com>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <stdlib.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtpceltdepay.h"
/* elementfactory information */
static const GstElementDetails gst_rtp_celtdepay_details =
GST_ELEMENT_DETAILS ("RTP CELT depayloader",
"Codec/Depayloader/Network",
"Extracts CELT audio from RTP packets",
"Wim Taymans <wim.taymans@gmail.com>");
/* RtpCELTDepay signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
};
static GstStaticPadTemplate gst_rtp_celt_depay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"audio\", "
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"clock-rate = (int) [32000, 48000], "
"encoding-name = (string) \"CELT\"")
);
static GstStaticPadTemplate gst_rtp_celt_depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-celt")
);
static GstBuffer *gst_rtp_celt_depay_process (GstBaseRTPDepayload * depayload,
GstBuffer * buf);
static gboolean gst_rtp_celt_depay_setcaps (GstBaseRTPDepayload * depayload,
GstCaps * caps);
GST_BOILERPLATE (GstRtpCELTDepay, gst_rtp_celt_depay, GstBaseRTPDepayload,
GST_TYPE_BASE_RTP_DEPAYLOAD);
static void
gst_rtp_celt_depay_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_celt_depay_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_celt_depay_sink_template));
gst_element_class_set_details (element_class, &gst_rtp_celtdepay_details);
}
static void
gst_rtp_celt_depay_class_init (GstRtpCELTDepayClass * klass)
{
GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
gstbasertpdepayload_class->process = gst_rtp_celt_depay_process;
gstbasertpdepayload_class->set_caps = gst_rtp_celt_depay_setcaps;
}
static void
gst_rtp_celt_depay_init (GstRtpCELTDepay * rtpceltdepay,
GstRtpCELTDepayClass * klass)
{
}
/* len 4 bytes LE,
* vendor string (len bytes),
* user_len 4 (0) bytes LE
*/
static const gchar gst_rtp_celt_comment[] =
"\045\0\0\0Depayloaded with GStreamer celtdepay\0\0\0\0";
static gboolean
gst_rtp_celt_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
{
GstStructure *structure;
GstRtpCELTDepay *rtpceltdepay;
gint clock_rate, nb_channels, frame_size;
GstBuffer *buf;
guint8 *data;
const gchar *params;
GstCaps *srccaps;
gboolean res;
rtpceltdepay = GST_RTP_CELT_DEPAY (depayload);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
goto no_clockrate;
depayload->clock_rate = clock_rate;
if (!(params = gst_structure_get_string (structure, "encoding-params")))
nb_channels = 1;
else {
nb_channels = atoi (params);
}
if (!(params = gst_structure_get_string (structure, "frame-size")))
frame_size = 480;
else {
frame_size = atoi (params);
}
/* construct minimal header and comment packet for the decoder */
buf = gst_buffer_new_and_alloc (60);
data = GST_BUFFER_DATA (buf);
memcpy (data, "CELT ", 8);
data += 8;
memcpy (data, "1.1.12", 7);
data += 20;
GST_WRITE_UINT32_LE (data, 0x80000006); /* version */
data += 4;
GST_WRITE_UINT32_LE (data, 56); /* header_size */
data += 4;
GST_WRITE_UINT32_LE (data, clock_rate); /* rate */
data += 4;
GST_WRITE_UINT32_LE (data, nb_channels); /* channels */
data += 4;
GST_WRITE_UINT32_LE (data, frame_size); /* frame-size */
data += 4;
GST_WRITE_UINT32_LE (data, -1); /* overlap */
data += 4;
GST_WRITE_UINT32_LE (data, -1); /* bytes_per_packet */
data += 4;
GST_WRITE_UINT32_LE (data, 0); /* extra headers */
srccaps = gst_caps_new_simple ("audio/x-celt", NULL);
res = gst_pad_set_caps (depayload->srcpad, srccaps);
gst_caps_unref (srccaps);
gst_buffer_set_caps (buf, GST_PAD_CAPS (depayload->srcpad));
gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpceltdepay), buf);
buf = gst_buffer_new_and_alloc (sizeof (gst_rtp_celt_comment));
memcpy (GST_BUFFER_DATA (buf), gst_rtp_celt_comment,
sizeof (gst_rtp_celt_comment));
gst_buffer_set_caps (buf, GST_PAD_CAPS (depayload->srcpad));
gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpceltdepay), buf);
return res;
/* ERRORS */
no_clockrate:
{
GST_DEBUG_OBJECT (depayload, "no clock-rate specified");
return FALSE;
}
}
static GstBuffer *
gst_rtp_celt_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
{
GstBuffer *outbuf = NULL;
guint8 *payload;
guint offset, pos, payload_len, total_size, size;
guint8 s;
GST_DEBUG ("process : got %d bytes, mark %d ts %u seqn %d",
GST_BUFFER_SIZE (buf),
gst_rtp_buffer_get_marker (buf),
gst_rtp_buffer_get_timestamp (buf), gst_rtp_buffer_get_seq (buf));
payload = gst_rtp_buffer_get_payload (buf);
payload_len = gst_rtp_buffer_get_payload_len (buf);
/* first count how many bytes are consumed by the size headers and make offset
* point to the first data byte */
total_size = 0;
offset = 0;
while (total_size < payload_len) {
size = 0;
do {
s = payload[offset++];
total_size += s + 1;
} while (s == 0xff);
}
/* offset is now pointing to the payload */
total_size = 0;
pos = 0;
while (total_size < payload_len) {
size = 0;
do {
s = payload[pos++];
size += s;
total_size += size + 1;
} while (s == 0xff);
outbuf = gst_rtp_buffer_get_payload_subbuffer (buf, offset, size);
offset += size;
gst_base_rtp_depayload_push (depayload, outbuf);
}
return NULL;
}
gboolean
gst_rtp_celt_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpceltdepay",
GST_RANK_MARGINAL, GST_TYPE_RTP_CELT_DEPAY);
}
/* GStreamer
* Copyright (C) <2009> Wim Taymans <wim.taymans@gmail.com>
*
* 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
*/
#ifndef __GST_RTP_CELT_DEPAY_H__
#define __GST_RTP_CELT_DEPAY_H__
#include <gst/gst.h>
#include <gst/rtp/gstbasertpdepayload.h>
G_BEGIN_DECLS
typedef struct _GstRtpCELTDepay GstRtpCELTDepay;
typedef struct _GstRtpCELTDepayClass GstRtpCELTDepayClass;
#define GST_TYPE_RTP_CELT_DEPAY \
(gst_rtp_celt_depay_get_type())
#define GST_RTP_CELT_DEPAY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_CELT_DEPAY,GstRtpCELTDepay))
#define GST_RTP_CELT_DEPAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_CELT_DEPAY,GstRtpCELTDepayClass))
#define GST_IS_RTP_CELT_DEPAY(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_CELT_DEPAY))
#define GST_IS_RTP_CELT_DEPAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_CELT_DEPAY))
struct _GstRtpCELTDepay
{
GstBaseRTPDepayload depayload;
};
struct _GstRtpCELTDepayClass
{
GstBaseRTPDepayloadClass parent_class;
};
gboolean gst_rtp_celt_depay_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_RTP_CELT_DEPAY_H__ */
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment