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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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rtpceltpay: add CELT RTP payloader
This commit is contained in:
Wim Taymans
parent
7994f64006
commit
ec554a7f02
4 changed files with 519 additions and 0 deletions
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@ -6,6 +6,7 @@ libgstrtp_la_SOURCES = \
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gstrtpchannels.c \
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gstrtpdepay.c \
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gstrtpac3depay.c \
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gstrtpceltpay.c \
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gstrtpdvdepay.c \
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gstrtpdvpay.c \
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gstrtpilbcdepay.c \
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@ -23,6 +23,7 @@
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#include "gstrtpdepay.h"
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#include "gstrtpac3depay.h"
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#include "gstrtpceltpay.h"
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#include "gstrtpdvdepay.h"
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#include "gstrtpdvpay.h"
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#include "gstrtpilbcdepay.h"
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@ -86,6 +87,9 @@ plugin_init (GstPlugin * plugin)
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if (!gst_rtp_ac3_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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return FALSE;
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if (!gst_rtp_dv_depay_plugin_init (plugin))
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return FALSE;
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454
gst/rtp/gstrtpceltpay.c
Normal file
454
gst/rtp/gstrtpceltpay.c
Normal file
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@ -0,0 +1,454 @@
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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 <stdlib.h>
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#include <string.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtpceltpay.h"
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GST_DEBUG_CATEGORY_STATIC (rtpceltpay_debug);
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#define GST_CAT_DEFAULT (rtpceltpay_debug)
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/* elementfactory information */
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static const GstElementDetails gst_rtp_celt_pay_details =
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GST_ELEMENT_DETAILS ("RTP CELT payloader",
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"Codec/Payloader/Network",
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"Payload-encodes CELT audio into a RTP packet",
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"Wim Taymans <wim.taymans@gmail.com>");
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static GstStaticPadTemplate gst_rtp_celt_pay_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 ("audio/x-celt, "
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"rate = (int) [ 32000, 64000 ], " "channels = (int) [1, 2]")
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);
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static GstStaticPadTemplate gst_rtp_celt_pay_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 ("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 void gst_rtp_celt_pay_finalize (GObject * object);
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static GstStateChangeReturn gst_rtp_celt_pay_change_state (GstElement *
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element, GstStateChange transition);
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static gboolean gst_rtp_celt_pay_setcaps (GstBaseRTPPayload * payload,
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GstCaps * caps);
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static GstCaps *gst_rtp_celt_pay_getcaps (GstBaseRTPPayload * payload,
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GstPad * pad);
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static GstFlowReturn gst_rtp_celt_pay_handle_buffer (GstBaseRTPPayload *
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payload, GstBuffer * buffer);
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GST_BOILERPLATE (GstRtpCELTPay, gst_rtp_celt_pay, GstBaseRTPPayload,
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GST_TYPE_BASE_RTP_PAYLOAD);
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static void
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gst_rtp_celt_pay_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_pay_sink_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_pay_src_template));
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gst_element_class_set_details (element_class, &gst_rtp_celt_pay_details);
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GST_DEBUG_CATEGORY_INIT (rtpceltpay_debug, "rtpceltpay", 0,
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"CELT RTP Payloader");
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}
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static void
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gst_rtp_celt_pay_class_init (GstRtpCELTPayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseRTPPayloadClass *gstbasertppayload_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
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gobject_class->finalize = gst_rtp_celt_pay_finalize;
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gstelement_class->change_state = gst_rtp_celt_pay_change_state;
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gstbasertppayload_class->set_caps = gst_rtp_celt_pay_setcaps;
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gstbasertppayload_class->get_caps = gst_rtp_celt_pay_getcaps;
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gstbasertppayload_class->handle_buffer = gst_rtp_celt_pay_handle_buffer;
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}
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static void
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gst_rtp_celt_pay_init (GstRtpCELTPay * rtpceltpay, GstRtpCELTPayClass * klass)
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{
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rtpceltpay->queue = g_queue_new ();
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}
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static void
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gst_rtp_celt_pay_finalize (GObject * object)
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{
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GstRtpCELTPay *rtpceltpay;
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rtpceltpay = GST_RTP_CELT_PAY (object);
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g_queue_free (rtpceltpay->queue);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_rtp_celt_pay_clear_queued (GstRtpCELTPay * rtpceltpay)
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{
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GstBuffer *buf;
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while ((buf = g_queue_pop_head (rtpceltpay->queue)))
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gst_buffer_unref (buf);
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rtpceltpay->bytes = 0;
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rtpceltpay->sbytes = 0;
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rtpceltpay->qduration = 0;
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}
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static void
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gst_rtp_celt_pay_add_queued (GstRtpCELTPay * rtpceltpay, GstBuffer * buffer,
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guint ssize, guint size, GstClockTime duration)
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{
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g_queue_push_tail (rtpceltpay->queue, buffer);
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rtpceltpay->sbytes += ssize;
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rtpceltpay->bytes += size;
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rtpceltpay->qduration += duration;
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}
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static gboolean
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gst_rtp_celt_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
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{
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/* don't configure yet, we wait for the ident packet */
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return TRUE;
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}
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static GstCaps *
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gst_rtp_celt_pay_getcaps (GstBaseRTPPayload * payload, GstPad * pad)
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{
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GstCaps *otherpadcaps;
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GstCaps *caps;
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otherpadcaps = gst_pad_get_allowed_caps (payload->srcpad);
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caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
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if (otherpadcaps) {
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if (!gst_caps_is_empty (otherpadcaps)) {
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GstStructure *ps = gst_caps_get_structure (otherpadcaps, 0);
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GstStructure *s = gst_caps_get_structure (caps, 0);
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gint clock_rate;
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if (gst_structure_get_int (ps, "clock-rate", &clock_rate)) {
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gst_structure_fixate_field_nearest_int (s, "rate", clock_rate);
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}
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}
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gst_caps_unref (otherpadcaps);
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}
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return caps;
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}
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static gboolean
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gst_rtp_celt_pay_parse_ident (GstRtpCELTPay * rtpceltpay,
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const guint8 * data, guint size)
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{
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guint32 version, header_size, rate, nb_channels, frame_size, overlap;
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guint32 bytes_per_packet;
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GstBaseRTPPayload *payload;
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gchar *cstr, *fsstr;
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gboolean res;
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/* we need the header string (8), the version string (20), the version
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* and the header length. */
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if (size < 36)
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goto too_small;
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if (!g_str_has_prefix ((const gchar *) data, "CELT "))
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goto wrong_header;
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/* skip header and version string */
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data += 28;
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version = GST_READ_UINT32_LE (data);
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GST_DEBUG_OBJECT (rtpceltpay, "version %08x", version);
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#if 0
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if (version != 1)
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goto wrong_version;
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#endif
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data += 4;
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/* ensure sizes */
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header_size = GST_READ_UINT32_LE (data);
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if (header_size < 56)
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goto header_too_small;
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if (size < header_size)
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goto payload_too_small;
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data += 4;
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rate = GST_READ_UINT32_LE (data);
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data += 4;
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nb_channels = GST_READ_UINT32_LE (data);
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data += 4;
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frame_size = GST_READ_UINT32_LE (data);
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data += 4;
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overlap = GST_READ_UINT32_LE (data);
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data += 4;
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bytes_per_packet = GST_READ_UINT32_LE (data);
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GST_DEBUG_OBJECT (rtpceltpay, "rate %d, nb_channels %d, frame_size %d",
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rate, nb_channels, frame_size);
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GST_DEBUG_OBJECT (rtpceltpay, "overlap %d, bytes_per_packet %d",
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overlap, bytes_per_packet);
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payload = GST_BASE_RTP_PAYLOAD (rtpceltpay);
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gst_basertppayload_set_options (payload, "audio", FALSE, "CELT", rate);
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cstr = g_strdup_printf ("%d", nb_channels);
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fsstr = g_strdup_printf ("%d", frame_size);
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res = gst_basertppayload_set_outcaps (payload, "encoding-params",
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G_TYPE_STRING, cstr, "frame-size", G_TYPE_STRING, fsstr, NULL);
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g_free (cstr);
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g_free (fsstr);
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return res;
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/* ERRORS */
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too_small:
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{
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GST_DEBUG_OBJECT (rtpceltpay,
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"ident packet too small, need at least 32 bytes");
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return FALSE;
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}
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wrong_header:
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{
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GST_DEBUG_OBJECT (rtpceltpay,
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"ident packet does not start with \"CELT \"");
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return FALSE;
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}
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#if 0
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wrong_version:
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{
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GST_DEBUG_OBJECT (rtpceltpay, "can only handle version 1, have version %d",
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version);
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return FALSE;
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}
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#endif
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header_too_small:
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{
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GST_DEBUG_OBJECT (rtpceltpay,
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"header size too small, need at least 80 bytes, " "got only %d",
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header_size);
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return FALSE;
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}
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payload_too_small:
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{
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GST_DEBUG_OBJECT (rtpceltpay,
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"payload too small, need at least %d bytes, got only %d", header_size,
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size);
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return FALSE;
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}
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}
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static GstFlowReturn
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gst_rtp_celt_pay_flush_queued (GstRtpCELTPay * rtpceltpay)
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{
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GstFlowReturn ret;
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GstBuffer *buf, *outbuf;
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guint8 *payload, *spayload;
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guint payload_len;
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GstClockTime duration;
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payload_len = rtpceltpay->bytes + rtpceltpay->sbytes;
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duration = rtpceltpay->qduration;
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GST_DEBUG_OBJECT (rtpceltpay, "flushing out %u, duration %" GST_TIME_FORMAT,
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payload_len, GST_TIME_ARGS (rtpceltpay->qduration));
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/* get a big enough packet for the sizes + payloads */
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outbuf = gst_rtp_buffer_new_allocate (payload_len, 0, 0);
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GST_BUFFER_DURATION (outbuf) = duration;
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/* point to the payload for size headers and data */
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spayload = gst_rtp_buffer_get_payload (outbuf);
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payload = spayload + rtpceltpay->sbytes;
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while ((buf = g_queue_pop_head (rtpceltpay->queue))) {
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guint size;
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/* copy first timestamp to output */
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if (GST_BUFFER_TIMESTAMP (outbuf) == -1)
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GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
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/* write the size to the header */
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size = GST_BUFFER_SIZE (buf);
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while (size > 0xff) {
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*spayload++ = 0xff;
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size -= 0xff;
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}
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*spayload++ = size;
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size = GST_BUFFER_SIZE (buf);
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/* copy payload */
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memcpy (payload, GST_BUFFER_DATA (buf), size);
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payload += size;
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gst_buffer_unref (buf);
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}
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/* we consumed it all */
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rtpceltpay->bytes = 0;
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rtpceltpay->sbytes = 0;
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rtpceltpay->qduration = 0;
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ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtpceltpay), outbuf);
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return ret;
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}
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static GstFlowReturn
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gst_rtp_celt_pay_handle_buffer (GstBaseRTPPayload * basepayload,
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GstBuffer * buffer)
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{
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GstFlowReturn ret;
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GstRtpCELTPay *rtpceltpay;
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guint size, payload_len;
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guint8 *data;
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GstClockTime duration, packet_dur;
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guint i, ssize, packet_len;
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rtpceltpay = GST_RTP_CELT_PAY (basepayload);
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ret = GST_FLOW_OK;
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size = GST_BUFFER_SIZE (buffer);
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data = GST_BUFFER_DATA (buffer);
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switch (rtpceltpay->packet) {
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case 0:
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/* ident packet. We need to parse the headers to construct the RTP
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* properties. */
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if (!gst_rtp_celt_pay_parse_ident (rtpceltpay, data, size))
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goto parse_error;
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goto done;
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case 1:
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/* comment packet, we ignore it */
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goto done;
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default:
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/* other packets go in the payload */
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break;
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}
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duration = GST_BUFFER_DURATION (buffer);
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GST_DEBUG_OBJECT (rtpceltpay,
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"got buffer of duration %" GST_TIME_FORMAT ", size %u",
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GST_TIME_ARGS (duration), size);
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/* calculate the size of the size field and the payload */
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ssize = 1;
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for (i = size; i > 0xff; i -= 0xff)
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ssize++;
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GST_DEBUG_OBJECT (rtpceltpay, "bytes for size %u", ssize);
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/* calculate the size and duration of the packet */
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payload_len = ssize + size + rtpceltpay->bytes + rtpceltpay->sbytes;
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packet_dur = rtpceltpay->qduration + duration;
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packet_len = gst_rtp_buffer_calc_packet_len (payload_len, 0, 0);
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if (gst_basertppayload_is_filled (basepayload, packet_len, packet_dur)) {
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/* size or duration would overflow the packet, flush the queued data */
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ret = gst_rtp_celt_pay_flush_queued (rtpceltpay);
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}
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/* queue the packet */
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gst_rtp_celt_pay_add_queued (rtpceltpay, buffer, ssize, size, duration);
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done:
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rtpceltpay->packet++;
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return ret;
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/* ERRORS */
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parse_error:
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{
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GST_ELEMENT_ERROR (rtpceltpay, STREAM, DECODE, (NULL),
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("Error parsing first identification packet."));
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return GST_FLOW_ERROR;
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}
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}
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static GstStateChangeReturn
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gst_rtp_celt_pay_change_state (GstElement * element, GstStateChange transition)
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{
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GstRtpCELTPay *rtpceltpay;
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GstStateChangeReturn ret;
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rtpceltpay = GST_RTP_CELT_PAY (element);
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switch (transition) {
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||||
case GST_STATE_CHANGE_NULL_TO_READY:
|
||||
break;
|
||||
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
||||
rtpceltpay->packet = 0;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
||||
gst_rtp_celt_pay_clear_queued (rtpceltpay);
|
||||
break;
|
||||
case GST_STATE_CHANGE_READY_TO_NULL:
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_rtp_celt_pay_plugin_init (GstPlugin * plugin)
|
||||
{
|
||||
return gst_element_register (plugin, "rtpceltpay",
|
||||
GST_RANK_NONE, GST_TYPE_RTP_CELT_PAY);
|
||||
}
|
||||
60
gst/rtp/gstrtpceltpay.h
Normal file
60
gst/rtp/gstrtpceltpay.h
Normal file
|
|
@ -0,0 +1,60 @@
|
|||
/* 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_PAY_H__
|
||||
#define __GST_RTP_CELT_PAY_H__
|
||||
|
||||
#include <gst/gst.h>
|
||||
#include <gst/rtp/gstbasertppayload.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
typedef struct _GstRtpCELTPay GstRtpCELTPay;
|
||||
typedef struct _GstRtpCELTPayClass GstRtpCELTPayClass;
|
||||
|
||||
#define GST_TYPE_RTP_CELT_PAY \
|
||||
(gst_rtp_celt_pay_get_type())
|
||||
#define GST_RTP_CELT_PAY(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_CELT_PAY,GstRtpCELTPay))
|
||||
#define GST_RTP_CELT_PAY_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_CELT_PAY,GstRtpCELTPayClass))
|
||||
#define GST_IS_RTP_CELT_PAY(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_CELT_PAY))
|
||||
#define GST_IS_RTP_CELT_PAY_CLASS(klass) \
|
||||
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_CELT_PAY))
|
||||
|
||||
struct _GstRtpCELTPay
|
||||
{
|
||||
GstBaseRTPPayload payload;
|
||||
|
||||
guint64 packet;
|
||||
|
||||
/* queue to hold packets */
|
||||
GQueue *queue;
|
||||
guint sbytes; /* bytes queued for sizes */
|
||||
guint bytes; /* bytes queued for data */
|
||||
GstClockTime qduration; /* queued duration */
|
||||
};
|
||||
|
||||
struct _GstRtpCELTPayClass
|
||||
{
|
||||
GstBaseRTPPayloadClass parent_class;
|
||||
};
|
||||
|
||||
gboolean gst_rtp_celt_pay_plugin_init (GstPlugin * plugin);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
#endif /* __GST_RTP_CELT_PAY_H__ */
|
||||
Loading…
Reference in a new issue