diff options
Diffstat (limited to 'gst/rtp/gstrtpilbcpay.c')
| -rw-r--r-- | gst/rtp/gstrtpilbcpay.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/gst/rtp/gstrtpilbcpay.c b/gst/rtp/gstrtpilbcpay.c new file mode 100644 index 0000000..677f5e2 --- /dev/null +++ b/gst/rtp/gstrtpilbcpay.c @@ -0,0 +1,216 @@ +/* GStreamer + * Copyright (C) <2006> Philippe Khalaf <burger@speedy.org> + * + * 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 <stdlib.h> +#include <gst/rtp/gstrtpbuffer.h> +#include "gstrtpilbcpay.h" + +GST_DEBUG_CATEGORY_STATIC (rtpilbcpay_debug); +#define GST_CAT_DEFAULT (rtpilbcpay_debug) + +static GstStaticPadTemplate gst_rtp_ilbc_pay_sink_template = +GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("audio/x-iLBC, " "mode = (int) {20, 30}") + ); + +static GstStaticPadTemplate gst_rtp_ilbc_pay_src_template = +GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("application/x-rtp, " + "media = (string) \"audio\", " + "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", " + "clock-rate = (int) 8000, " + "encoding-name = (string) \"ILBC\", " + "mode = (string) { \"20\", \"30\" }") + ); + + +static GstCaps *gst_rtp_ilbc_pay_sink_getcaps (GstBaseRTPPayload * payload, + GstPad * pad); +static gboolean gst_rtp_ilbc_pay_sink_setcaps (GstBaseRTPPayload * payload, + GstCaps * caps); + +GST_BOILERPLATE (GstRTPILBCPay, gst_rtp_ilbc_pay, GstBaseRTPAudioPayload, + GST_TYPE_BASE_RTP_AUDIO_PAYLOAD); + +static void +gst_rtp_ilbc_pay_base_init (gpointer klass) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (klass); + + gst_element_class_add_static_pad_template (element_class, + &gst_rtp_ilbc_pay_sink_template); + gst_element_class_add_static_pad_template (element_class, + &gst_rtp_ilbc_pay_src_template); + gst_element_class_set_details_simple (element_class, "RTP iLBC Payloader", + "Codec/Payloader/Network/RTP", + "Packetize iLBC audio streams into RTP packets", + "Philippe Kalaf <philippe.kalaf@collabora.co.uk>"); +} + +static void +gst_rtp_ilbc_pay_class_init (GstRTPILBCPayClass * klass) +{ + GstBaseRTPPayloadClass *gstbasertppayload_class; + + gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass; + + gstbasertppayload_class->set_caps = gst_rtp_ilbc_pay_sink_setcaps; + gstbasertppayload_class->get_caps = gst_rtp_ilbc_pay_sink_getcaps; + + GST_DEBUG_CATEGORY_INIT (rtpilbcpay_debug, "rtpilbcpay", 0, + "iLBC audio RTP payloader"); +} + +static void +gst_rtp_ilbc_pay_init (GstRTPILBCPay * rtpilbcpay, GstRTPILBCPayClass * klass) +{ + GstBaseRTPPayload *basertppayload; + GstBaseRTPAudioPayload *basertpaudiopayload; + + basertppayload = GST_BASE_RTP_PAYLOAD (rtpilbcpay); + basertpaudiopayload = GST_BASE_RTP_AUDIO_PAYLOAD (rtpilbcpay); + + /* we don't set the payload type, it should be set by the application using + * the pt property or the default 96 will be used */ + basertppayload->clock_rate = 8000; + + rtpilbcpay->mode = -1; + + /* tell basertpaudiopayload that this is a frame based codec */ + gst_base_rtp_audio_payload_set_frame_based (basertpaudiopayload); +} + +static gboolean +gst_rtp_ilbc_pay_sink_setcaps (GstBaseRTPPayload * basertppayload, + GstCaps * caps) +{ + GstRTPILBCPay *rtpilbcpay; + GstBaseRTPAudioPayload *basertpaudiopayload; + gboolean ret; + gint mode; + gchar *mode_str; + GstStructure *structure; + const char *payload_name; + + rtpilbcpay = GST_RTP_ILBC_PAY (basertppayload); + basertpaudiopayload = GST_BASE_RTP_AUDIO_PAYLOAD (basertppayload); + + structure = gst_caps_get_structure (caps, 0); + + payload_name = gst_structure_get_name (structure); + if (g_ascii_strcasecmp ("audio/x-iLBC", payload_name)) + goto wrong_caps; + + if (!gst_structure_get_int (structure, "mode", &mode)) + goto no_mode; + + if (mode != 20 && mode != 30) + goto wrong_mode; + + gst_basertppayload_set_options (basertppayload, "audio", TRUE, "ILBC", 8000); + /* set options for this frame based audio codec */ + gst_base_rtp_audio_payload_set_frame_options (basertpaudiopayload, + mode, mode == 30 ? 50 : 38); + + mode_str = g_strdup_printf ("%d", mode); + ret = + gst_basertppayload_set_outcaps (basertppayload, "mode", G_TYPE_STRING, + mode_str, NULL); + g_free (mode_str); + + if (mode != rtpilbcpay->mode && rtpilbcpay->mode != -1) + goto mode_changed; + + rtpilbcpay->mode = mode; + + return ret; + + /* ERRORS */ +wrong_caps: + { + GST_ERROR_OBJECT (rtpilbcpay, "expected audio/x-iLBC, received %s", + payload_name); + return FALSE; + } +no_mode: + { + GST_ERROR_OBJECT (rtpilbcpay, "did not receive a mode"); + return FALSE; + } +wrong_mode: + { + GST_ERROR_OBJECT (rtpilbcpay, "mode must be 20 or 30, received %d", mode); + return FALSE; + } +mode_changed: + { + GST_ERROR_OBJECT (rtpilbcpay, "Mode has changed from %d to %d! " + "Mode cannot change while streaming", rtpilbcpay->mode, mode); + return FALSE; + } +} + +/* we return the padtemplate caps with the mode field fixated to a value if we + * can */ +static GstCaps * +gst_rtp_ilbc_pay_sink_getcaps (GstBaseRTPPayload * rtppayload, GstPad * pad) +{ + GstCaps *otherpadcaps; + GstCaps *caps; + + otherpadcaps = gst_pad_get_allowed_caps (rtppayload->srcpad); + caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad)); + + if (otherpadcaps) { + if (!gst_caps_is_empty (otherpadcaps)) { + GstStructure *structure; + const gchar *mode_str; + gint mode; + + structure = gst_caps_get_structure (otherpadcaps, 0); + + /* parse mode, if we can */ + mode_str = gst_structure_get_string (structure, "mode"); + if (mode_str) { + mode = strtol (mode_str, NULL, 10); + if (mode == 20 || mode == 30) { + structure = gst_caps_get_structure (caps, 0); + gst_structure_set (structure, "mode", G_TYPE_INT, mode, NULL); + } + } + } + gst_caps_unref (otherpadcaps); + } + return caps; +} + +gboolean +gst_rtp_ilbc_pay_plugin_init (GstPlugin * plugin) +{ + return gst_element_register (plugin, "rtpilbcpay", + GST_RANK_SECONDARY, GST_TYPE_RTP_ILBC_PAY); +} |