--- /dev/null
+/* 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 <stdlib.h>
+#include <string.h>
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtpceltpay.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtpceltpay_debug);
+#define GST_CAT_DEFAULT (rtpceltpay_debug)
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_celt_pay_details =
+GST_ELEMENT_DETAILS ("RTP CELT payloader",
+ "Codec/Payloader/Network",
+ "Payload-encodes CELT audio into a RTP packet",
+ "Wim Taymans <wim.taymans@gmail.com>");
+
+static GstStaticPadTemplate gst_rtp_celt_pay_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-celt, "
+ "rate = (int) [ 32000, 64000 ], " "channels = (int) [1, 2]")
+ );
+
+static GstStaticPadTemplate gst_rtp_celt_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) [ 32000, 48000 ], "
+ "encoding-name = (string) \"CELT\"")
+ );
+
+static void gst_rtp_celt_pay_finalize (GObject * object);
+
+static GstStateChangeReturn gst_rtp_celt_pay_change_state (GstElement *
+ element, GstStateChange transition);
+
+static gboolean gst_rtp_celt_pay_setcaps (GstBaseRTPPayload * payload,
+ GstCaps * caps);
+static GstCaps *gst_rtp_celt_pay_getcaps (GstBaseRTPPayload * payload,
+ GstPad * pad);
+static GstFlowReturn gst_rtp_celt_pay_handle_buffer (GstBaseRTPPayload *
+ payload, GstBuffer * buffer);
+
+GST_BOILERPLATE (GstRtpCELTPay, gst_rtp_celt_pay, GstBaseRTPPayload,
+ GST_TYPE_BASE_RTP_PAYLOAD);
+
+static void
+gst_rtp_celt_pay_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_pay_sink_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_rtp_celt_pay_src_template));
+ gst_element_class_set_details (element_class, &gst_rtp_celt_pay_details);
+
+ GST_DEBUG_CATEGORY_INIT (rtpceltpay_debug, "rtpceltpay", 0,
+ "CELT RTP Payloader");
+}
+
+static void
+gst_rtp_celt_pay_class_init (GstRtpCELTPayClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+ GstBaseRTPPayloadClass *gstbasertppayload_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+ gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
+
+ gobject_class->finalize = gst_rtp_celt_pay_finalize;
+
+ gstelement_class->change_state = gst_rtp_celt_pay_change_state;
+
+ gstbasertppayload_class->set_caps = gst_rtp_celt_pay_setcaps;
+ gstbasertppayload_class->get_caps = gst_rtp_celt_pay_getcaps;
+ gstbasertppayload_class->handle_buffer = gst_rtp_celt_pay_handle_buffer;
+}
+
+static void
+gst_rtp_celt_pay_init (GstRtpCELTPay * rtpceltpay, GstRtpCELTPayClass * klass)
+{
+ rtpceltpay->queue = g_queue_new ();
+}
+
+static void
+gst_rtp_celt_pay_finalize (GObject * object)
+{
+ GstRtpCELTPay *rtpceltpay;
+
+ rtpceltpay = GST_RTP_CELT_PAY (object);
+
+ g_queue_free (rtpceltpay->queue);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_rtp_celt_pay_clear_queued (GstRtpCELTPay * rtpceltpay)
+{
+ GstBuffer *buf;
+
+ while ((buf = g_queue_pop_head (rtpceltpay->queue)))
+ gst_buffer_unref (buf);
+
+ rtpceltpay->bytes = 0;
+ rtpceltpay->sbytes = 0;
+ rtpceltpay->qduration = 0;
+}
+
+static void
+gst_rtp_celt_pay_add_queued (GstRtpCELTPay * rtpceltpay, GstBuffer * buffer,
+ guint ssize, guint size, GstClockTime duration)
+{
+ g_queue_push_tail (rtpceltpay->queue, buffer);
+ rtpceltpay->sbytes += ssize;
+ rtpceltpay->bytes += size;
+ rtpceltpay->qduration += duration;
+}
+
+static gboolean
+gst_rtp_celt_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
+{
+ /* don't configure yet, we wait for the ident packet */
+ return TRUE;
+}
+
+
+static GstCaps *
+gst_rtp_celt_pay_getcaps (GstBaseRTPPayload * payload, GstPad * pad)
+{
+ GstCaps *otherpadcaps;
+ GstCaps *caps;
+
+ otherpadcaps = gst_pad_get_allowed_caps (payload->srcpad);
+ caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
+
+ if (otherpadcaps) {
+ if (!gst_caps_is_empty (otherpadcaps)) {
+ GstStructure *ps = gst_caps_get_structure (otherpadcaps, 0);
+ GstStructure *s = gst_caps_get_structure (caps, 0);
+ gint clock_rate;
+
+ if (gst_structure_get_int (ps, "clock-rate", &clock_rate)) {
+ gst_structure_fixate_field_nearest_int (s, "rate", clock_rate);
+ }
+ }
+ gst_caps_unref (otherpadcaps);
+ }
+
+ return caps;
+}
+
+static gboolean
+gst_rtp_celt_pay_parse_ident (GstRtpCELTPay * rtpceltpay,
+ const guint8 * data, guint size)
+{
+ guint32 version, header_size, rate, nb_channels, frame_size, overlap;
+ guint32 bytes_per_packet;
+ GstBaseRTPPayload *payload;
+ gchar *cstr, *fsstr;
+ gboolean res;
+
+ /* we need the header string (8), the version string (20), the version
+ * and the header length. */
+ if (size < 36)
+ goto too_small;
+
+ if (!g_str_has_prefix ((const gchar *) data, "CELT "))
+ goto wrong_header;
+
+ /* skip header and version string */
+ data += 28;
+
+ version = GST_READ_UINT32_LE (data);
+ GST_DEBUG_OBJECT (rtpceltpay, "version %08x", version);
+#if 0
+ if (version != 1)
+ goto wrong_version;
+#endif
+
+ data += 4;
+ /* ensure sizes */
+ header_size = GST_READ_UINT32_LE (data);
+ if (header_size < 56)
+ goto header_too_small;
+
+ if (size < header_size)
+ goto payload_too_small;
+
+ data += 4;
+ rate = GST_READ_UINT32_LE (data);
+ data += 4;
+ nb_channels = GST_READ_UINT32_LE (data);
+ data += 4;
+ frame_size = GST_READ_UINT32_LE (data);
+ data += 4;
+ overlap = GST_READ_UINT32_LE (data);
+ data += 4;
+ bytes_per_packet = GST_READ_UINT32_LE (data);
+
+ GST_DEBUG_OBJECT (rtpceltpay, "rate %d, nb_channels %d, frame_size %d",
+ rate, nb_channels, frame_size);
+ GST_DEBUG_OBJECT (rtpceltpay, "overlap %d, bytes_per_packet %d",
+ overlap, bytes_per_packet);
+
+ payload = GST_BASE_RTP_PAYLOAD (rtpceltpay);
+
+ gst_basertppayload_set_options (payload, "audio", FALSE, "CELT", rate);
+ cstr = g_strdup_printf ("%d", nb_channels);
+ fsstr = g_strdup_printf ("%d", frame_size);
+ res = gst_basertppayload_set_outcaps (payload, "encoding-params",
+ G_TYPE_STRING, cstr, "frame-size", G_TYPE_STRING, fsstr, NULL);
+ g_free (cstr);
+ g_free (fsstr);
+
+ return res;
+
+ /* ERRORS */
+too_small:
+ {
+ GST_DEBUG_OBJECT (rtpceltpay,
+ "ident packet too small, need at least 32 bytes");
+ return FALSE;
+ }
+wrong_header:
+ {
+ GST_DEBUG_OBJECT (rtpceltpay,
+ "ident packet does not start with \"CELT \"");
+ return FALSE;
+ }
+#if 0
+wrong_version:
+ {
+ GST_DEBUG_OBJECT (rtpceltpay, "can only handle version 1, have version %d",
+ version);
+ return FALSE;
+ }
+#endif
+header_too_small:
+ {
+ GST_DEBUG_OBJECT (rtpceltpay,
+ "header size too small, need at least 80 bytes, " "got only %d",
+ header_size);
+ return FALSE;
+ }
+payload_too_small:
+ {
+ GST_DEBUG_OBJECT (rtpceltpay,
+ "payload too small, need at least %d bytes, got only %d", header_size,
+ size);
+ return FALSE;
+ }
+}
+
+static GstFlowReturn
+gst_rtp_celt_pay_flush_queued (GstRtpCELTPay * rtpceltpay)
+{
+ GstFlowReturn ret;
+ GstBuffer *buf, *outbuf;
+ guint8 *payload, *spayload;
+ guint payload_len;
+ GstClockTime duration;
+
+ payload_len = rtpceltpay->bytes + rtpceltpay->sbytes;
+ duration = rtpceltpay->qduration;
+
+ GST_DEBUG_OBJECT (rtpceltpay, "flushing out %u, duration %" GST_TIME_FORMAT,
+ payload_len, GST_TIME_ARGS (rtpceltpay->qduration));
+
+ /* get a big enough packet for the sizes + payloads */
+ outbuf = gst_rtp_buffer_new_allocate (payload_len, 0, 0);
+
+ GST_BUFFER_DURATION (outbuf) = duration;
+
+ /* point to the payload for size headers and data */
+ spayload = gst_rtp_buffer_get_payload (outbuf);
+ payload = spayload + rtpceltpay->sbytes;
+
+ while ((buf = g_queue_pop_head (rtpceltpay->queue))) {
+ guint size;
+
+ /* copy first timestamp to output */
+ if (GST_BUFFER_TIMESTAMP (outbuf) == -1)
+ GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
+
+ /* write the size to the header */
+ size = GST_BUFFER_SIZE (buf);
+ while (size > 0xff) {
+ *spayload++ = 0xff;
+ size -= 0xff;
+ }
+ *spayload++ = size;
+
+ size = GST_BUFFER_SIZE (buf);
+ /* copy payload */
+ memcpy (payload, GST_BUFFER_DATA (buf), size);
+ payload += size;
+
+ gst_buffer_unref (buf);
+ }
+
+ /* we consumed it all */
+ rtpceltpay->bytes = 0;
+ rtpceltpay->sbytes = 0;
+ rtpceltpay->qduration = 0;
+
+ ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtpceltpay), outbuf);
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_rtp_celt_pay_handle_buffer (GstBaseRTPPayload * basepayload,
+ GstBuffer * buffer)
+{
+ GstFlowReturn ret;
+ GstRtpCELTPay *rtpceltpay;
+ guint size, payload_len;
+ guint8 *data;
+ GstClockTime duration, packet_dur;
+ guint i, ssize, packet_len;
+
+ rtpceltpay = GST_RTP_CELT_PAY (basepayload);
+
+ ret = GST_FLOW_OK;
+
+ size = GST_BUFFER_SIZE (buffer);
+ data = GST_BUFFER_DATA (buffer);
+
+ switch (rtpceltpay->packet) {
+ case 0:
+ /* ident packet. We need to parse the headers to construct the RTP
+ * properties. */
+ if (!gst_rtp_celt_pay_parse_ident (rtpceltpay, data, size))
+ goto parse_error;
+
+ goto done;
+ case 1:
+ /* comment packet, we ignore it */
+ goto done;
+ default:
+ /* other packets go in the payload */
+ break;
+ }
+
+ duration = GST_BUFFER_DURATION (buffer);
+
+ GST_DEBUG_OBJECT (rtpceltpay,
+ "got buffer of duration %" GST_TIME_FORMAT ", size %u",
+ GST_TIME_ARGS (duration), size);
+
+ /* calculate the size of the size field and the payload */
+ ssize = 1;
+ for (i = size; i > 0xff; i -= 0xff)
+ ssize++;
+
+ GST_DEBUG_OBJECT (rtpceltpay, "bytes for size %u", ssize);
+
+ /* calculate the size and duration of the packet */
+ payload_len = ssize + size + rtpceltpay->bytes + rtpceltpay->sbytes;
+ packet_dur = rtpceltpay->qduration + duration;
+
+ packet_len = gst_rtp_buffer_calc_packet_len (payload_len, 0, 0);
+
+ if (gst_basertppayload_is_filled (basepayload, packet_len, packet_dur)) {
+ /* size or duration would overflow the packet, flush the queued data */
+ ret = gst_rtp_celt_pay_flush_queued (rtpceltpay);
+ }
+
+ /* queue the packet */
+ gst_rtp_celt_pay_add_queued (rtpceltpay, buffer, ssize, size, duration);
+
+done:
+ rtpceltpay->packet++;
+
+ return ret;
+
+ /* ERRORS */
+parse_error:
+ {
+ GST_ELEMENT_ERROR (rtpceltpay, STREAM, DECODE, (NULL),
+ ("Error parsing first identification packet."));
+ return GST_FLOW_ERROR;
+ }
+}
+
+static GstStateChangeReturn
+gst_rtp_celt_pay_change_state (GstElement * element, GstStateChange transition)
+{
+ GstRtpCELTPay *rtpceltpay;
+ GstStateChangeReturn ret;
+
+ rtpceltpay = GST_RTP_CELT_PAY (element);
+
+ switch (transition) {
+ 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);
+}
projects / platform / upstream / gst-plugins-good.git / commitdiff