celtdepay: add CELT depayloader
This commit is contained in:
parent
ec554a7f02
commit
ace2a84447
@ -6,6 +6,7 @@ libgstrtp_la_SOURCES = \
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gstrtpchannels.c \
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gstrtpchannels.c \
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gstrtpdepay.c \
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gstrtpdepay.c \
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gstrtpac3depay.c \
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gstrtpac3depay.c \
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gstrtpceltdepay.c \
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gstrtpceltpay.c \
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gstrtpceltpay.c \
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gstrtpdvdepay.c \
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gstrtpdvdepay.c \
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gstrtpdvpay.c \
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gstrtpdvpay.c \
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@ -23,6 +23,7 @@
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#include "gstrtpdepay.h"
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#include "gstrtpdepay.h"
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#include "gstrtpac3depay.h"
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#include "gstrtpac3depay.h"
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#include "gstrtpceltdepay.h"
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#include "gstrtpceltpay.h"
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#include "gstrtpceltpay.h"
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#include "gstrtpdvdepay.h"
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#include "gstrtpdvdepay.h"
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#include "gstrtpdvpay.h"
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#include "gstrtpdvpay.h"
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@ -87,6 +88,9 @@ plugin_init (GstPlugin * plugin)
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if (!gst_rtp_ac3_depay_plugin_init (plugin))
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if (!gst_rtp_ac3_depay_plugin_init (plugin))
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return FALSE;
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return FALSE;
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if (!gst_rtp_celt_depay_plugin_init (plugin))
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return FALSE;
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if (!gst_rtp_celt_pay_plugin_init (plugin))
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if (!gst_rtp_celt_pay_plugin_init (plugin))
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return FALSE;
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return FALSE;
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242
gst/rtp/gstrtpceltdepay.c
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242
gst/rtp/gstrtpceltdepay.c
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@ -0,0 +1,242 @@
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/* GStreamer
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* Copyright (C) <2009> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtpceltdepay.h"
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/* elementfactory information */
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static const GstElementDetails gst_rtp_celtdepay_details =
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GST_ELEMENT_DETAILS ("RTP CELT depayloader",
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"Codec/Depayloader/Network",
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"Extracts CELT audio from RTP packets",
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"Wim Taymans <wim.taymans@gmail.com>");
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/* RtpCELTDepay signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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};
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static GstStaticPadTemplate gst_rtp_celt_depay_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/x-rtp, "
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"media = (string) \"audio\", "
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"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
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"clock-rate = (int) [32000, 48000], "
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"encoding-name = (string) \"CELT\"")
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);
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static GstStaticPadTemplate gst_rtp_celt_depay_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-celt")
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);
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static GstBuffer *gst_rtp_celt_depay_process (GstBaseRTPDepayload * depayload,
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GstBuffer * buf);
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static gboolean gst_rtp_celt_depay_setcaps (GstBaseRTPDepayload * depayload,
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GstCaps * caps);
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GST_BOILERPLATE (GstRtpCELTDepay, gst_rtp_celt_depay, GstBaseRTPDepayload,
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GST_TYPE_BASE_RTP_DEPAYLOAD);
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static void
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gst_rtp_celt_depay_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_celt_depay_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_celt_depay_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_celtdepay_details);
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}
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static void
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gst_rtp_celt_depay_class_init (GstRtpCELTDepayClass * klass)
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{
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GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
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gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
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gstbasertpdepayload_class->process = gst_rtp_celt_depay_process;
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gstbasertpdepayload_class->set_caps = gst_rtp_celt_depay_setcaps;
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}
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static void
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gst_rtp_celt_depay_init (GstRtpCELTDepay * rtpceltdepay,
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GstRtpCELTDepayClass * klass)
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{
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}
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/* len 4 bytes LE,
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* vendor string (len bytes),
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* user_len 4 (0) bytes LE
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*/
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static const gchar gst_rtp_celt_comment[] =
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"\045\0\0\0Depayloaded with GStreamer celtdepay\0\0\0\0";
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static gboolean
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gst_rtp_celt_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
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{
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GstStructure *structure;
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GstRtpCELTDepay *rtpceltdepay;
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gint clock_rate, nb_channels, frame_size;
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GstBuffer *buf;
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guint8 *data;
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const gchar *params;
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GstCaps *srccaps;
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gboolean res;
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rtpceltdepay = GST_RTP_CELT_DEPAY (depayload);
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structure = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
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goto no_clockrate;
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depayload->clock_rate = clock_rate;
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if (!(params = gst_structure_get_string (structure, "encoding-params")))
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nb_channels = 1;
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else {
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nb_channels = atoi (params);
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}
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if (!(params = gst_structure_get_string (structure, "frame-size")))
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frame_size = 480;
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else {
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frame_size = atoi (params);
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}
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/* construct minimal header and comment packet for the decoder */
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buf = gst_buffer_new_and_alloc (60);
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data = GST_BUFFER_DATA (buf);
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memcpy (data, "CELT ", 8);
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data += 8;
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memcpy (data, "1.1.12", 7);
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data += 20;
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GST_WRITE_UINT32_LE (data, 0x80000006); /* version */
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data += 4;
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GST_WRITE_UINT32_LE (data, 56); /* header_size */
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data += 4;
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GST_WRITE_UINT32_LE (data, clock_rate); /* rate */
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data += 4;
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GST_WRITE_UINT32_LE (data, nb_channels); /* channels */
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data += 4;
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GST_WRITE_UINT32_LE (data, frame_size); /* frame-size */
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data += 4;
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GST_WRITE_UINT32_LE (data, -1); /* overlap */
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data += 4;
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GST_WRITE_UINT32_LE (data, -1); /* bytes_per_packet */
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data += 4;
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GST_WRITE_UINT32_LE (data, 0); /* extra headers */
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srccaps = gst_caps_new_simple ("audio/x-celt", NULL);
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res = gst_pad_set_caps (depayload->srcpad, srccaps);
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gst_caps_unref (srccaps);
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gst_buffer_set_caps (buf, GST_PAD_CAPS (depayload->srcpad));
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gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpceltdepay), buf);
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buf = gst_buffer_new_and_alloc (sizeof (gst_rtp_celt_comment));
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memcpy (GST_BUFFER_DATA (buf), gst_rtp_celt_comment,
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sizeof (gst_rtp_celt_comment));
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gst_buffer_set_caps (buf, GST_PAD_CAPS (depayload->srcpad));
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gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpceltdepay), buf);
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return res;
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/* ERRORS */
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no_clockrate:
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{
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GST_DEBUG_OBJECT (depayload, "no clock-rate specified");
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return FALSE;
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}
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}
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static GstBuffer *
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gst_rtp_celt_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
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{
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GstBuffer *outbuf = NULL;
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guint8 *payload;
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guint offset, pos, payload_len, total_size, size;
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guint8 s;
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GST_DEBUG ("process : got %d bytes, mark %d ts %u seqn %d",
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GST_BUFFER_SIZE (buf),
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gst_rtp_buffer_get_marker (buf),
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gst_rtp_buffer_get_timestamp (buf), gst_rtp_buffer_get_seq (buf));
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payload = gst_rtp_buffer_get_payload (buf);
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payload_len = gst_rtp_buffer_get_payload_len (buf);
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/* first count how many bytes are consumed by the size headers and make offset
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* point to the first data byte */
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total_size = 0;
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offset = 0;
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while (total_size < payload_len) {
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size = 0;
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do {
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s = payload[offset++];
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total_size += s + 1;
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} while (s == 0xff);
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}
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/* offset is now pointing to the payload */
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total_size = 0;
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pos = 0;
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while (total_size < payload_len) {
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size = 0;
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do {
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s = payload[pos++];
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size += s;
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total_size += size + 1;
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} while (s == 0xff);
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outbuf = gst_rtp_buffer_get_payload_subbuffer (buf, offset, size);
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offset += size;
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gst_base_rtp_depayload_push (depayload, outbuf);
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}
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return NULL;
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}
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gboolean
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gst_rtp_celt_depay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpceltdepay",
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GST_RANK_MARGINAL, GST_TYPE_RTP_CELT_DEPAY);
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}
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51
gst/rtp/gstrtpceltdepay.h
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51
gst/rtp/gstrtpceltdepay.h
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@ -0,0 +1,51 @@
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/* GStreamer
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* Copyright (C) <2009> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more
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*/
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#ifndef __GST_RTP_CELT_DEPAY_H__
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#define __GST_RTP_CELT_DEPAY_H__
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#include <gst/gst.h>
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#include <gst/rtp/gstbasertpdepayload.h>
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G_BEGIN_DECLS
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typedef struct _GstRtpCELTDepay GstRtpCELTDepay;
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typedef struct _GstRtpCELTDepayClass GstRtpCELTDepayClass;
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#define GST_TYPE_RTP_CELT_DEPAY \
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(gst_rtp_celt_depay_get_type())
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#define GST_RTP_CELT_DEPAY(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_CELT_DEPAY,GstRtpCELTDepay))
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#define GST_RTP_CELT_DEPAY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_CELT_DEPAY,GstRtpCELTDepayClass))
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#define GST_IS_RTP_CELT_DEPAY(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_CELT_DEPAY))
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#define GST_IS_RTP_CELT_DEPAY_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_CELT_DEPAY))
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struct _GstRtpCELTDepay
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{
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GstBaseRTPDepayload depayload;
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};
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struct _GstRtpCELTDepayClass
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{
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GstBaseRTPDepayloadClass parent_class;
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};
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gboolean gst_rtp_celt_depay_plugin_init (GstPlugin * plugin);
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G_END_DECLS
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#endif /* __GST_RTP_CELT_DEPAY_H__ */
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