--- /dev/null
+/*
+ *
+ * BlueZ - Bluetooth protocol stack for Linux
+ *
+ * Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org>
+ *
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstrtpsbcpay.h"
+#include <math.h>
+#include <string.h>
+
+#define RTP_SBC_PAYLOAD_HEADER_SIZE 1
+#define DEFAULT_MIN_FRAMES 0
+#define RTP_SBC_HEADER_TOTAL (12 + RTP_SBC_PAYLOAD_HEADER_SIZE)
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+
+struct rtp_payload
+{
+ guint8 frame_count:4;
+ guint8 rfa0:1;
+ guint8 is_last_fragment:1;
+ guint8 is_first_fragment:1;
+ guint8 is_fragmented:1;
+} __attribute__ ((packed));
+
+#elif __BYTE_ORDER == __BIG_ENDIAN
+
+struct rtp_payload
+{
+ guint8 is_fragmented:1;
+ guint8 is_first_fragment:1;
+ guint8 is_last_fragment:1;
+ guint8 rfa0:1;
+ guint8 frame_count:4;
+} __attribute__ ((packed));
+
+#else
+#error "Unknown byte order"
+#endif
+
+enum
+{
+ PROP_0,
+ PROP_MIN_FRAMES
+};
+
+GST_DEBUG_CATEGORY_STATIC (gst_rtp_sbc_pay_debug);
+#define GST_CAT_DEFAULT gst_rtp_sbc_pay_debug
+
+GST_BOILERPLATE (GstRtpSBCPay, gst_rtp_sbc_pay, GstBaseRTPPayload,
+ GST_TYPE_BASE_RTP_PAYLOAD);
+
+static const GstElementDetails gst_rtp_sbc_pay_details =
+GST_ELEMENT_DETAILS ("RTP packet payloader",
+ "Codec/Payloader/Network",
+ "Payload SBC audio as RTP packets",
+ "Thiago Sousa Santos " "<thiagoss@lcc.ufcg.edu.br>");
+
+static GstStaticPadTemplate gst_rtp_sbc_pay_sink_factory =
+ GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-sbc, " /* FIXME remove those caps? */
+ "rate = (int) { 16000, 32000, 44100, 48000 }, "
+ "channels = (int) [ 1, 2 ], "
+ "mode = (string) { mono, dual, stereo, joint }, "
+ "blocks = (int) { 4, 8, 12, 16 }, "
+ "subbands = (int) { 4, 8 }, "
+ "allocation = (string) { snr, loudness },"
+ "bitpool = (int) [ 2, 64 ]; ")
+ );
+
+static GstStaticPadTemplate gst_rtp_sbc_pay_src_factory =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("application/x-rtp") /* FIXME put things here */
+ );
+
+static void gst_rtp_sbc_pay_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_rtp_sbc_pay_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static gint
+gst_rtp_sbc_pay_get_frame_len (gint subbands, gint channels,
+ gint blocks, gint bitpool, const gchar * channel_mode)
+{
+ gint len;
+ gint join;
+
+ len = 4 + (4 * subbands * channels) / 8;
+
+ if (strcmp (channel_mode, "mono") == 0 || strcmp (channel_mode, "dual") == 0)
+ len += ((blocks * channels * bitpool) + 7) / 8;
+ else {
+ join = strcmp (channel_mode, "joint") == 0 ? 1 : 0;
+ len += ((join * subbands + blocks * bitpool) + 7) / 8;
+ }
+
+ return len;
+}
+
+static gboolean
+gst_rtp_sbc_pay_set_caps (GstBaseRTPPayload * payload, GstCaps * caps)
+{
+ GstRtpSBCPay *sbcpay;
+ gint rate, subbands, channels, blocks, bitpool;
+ gint frame_len;
+ const gchar *channel_mode;
+ GstStructure *structure;
+
+ sbcpay = GST_RTP_SBC_PAY (payload);
+
+ structure = gst_caps_get_structure (caps, 0);
+ if (!gst_structure_get_int (structure, "rate", &rate))
+ return FALSE;
+ if (!gst_structure_get_int (structure, "channels", &channels))
+ return FALSE;
+ if (!gst_structure_get_int (structure, "blocks", &blocks))
+ return FALSE;
+ if (!gst_structure_get_int (structure, "bitpool", &bitpool))
+ return FALSE;
+ if (!gst_structure_get_int (structure, "subbands", &subbands))
+ return FALSE;
+
+ channel_mode = gst_structure_get_string (structure, "mode");
+ if (!channel_mode)
+ return FALSE;
+
+ frame_len = gst_rtp_sbc_pay_get_frame_len (subbands, channels, blocks,
+ bitpool, channel_mode);
+
+ sbcpay->frame_length = frame_len;
+
+ gst_basertppayload_set_options (payload, "audio", FALSE, "SBC", rate);
+
+ GST_DEBUG_OBJECT (payload, "calculated frame length: %d ", frame_len);
+
+ return gst_basertppayload_set_outcaps (payload, NULL);
+}
+
+static GstFlowReturn
+gst_rtp_sbc_pay_flush_buffers (GstRtpSBCPay * sbcpay)
+{
+ guint available;
+ guint max_payload;
+ GstBuffer *outbuf;
+ guint8 *payload_data;
+ guint8 *data;
+ struct rtp_payload *payload;
+
+ if (sbcpay->frame_length == 0) {
+ GST_ERROR_OBJECT (sbcpay, "Frame length is 0");
+ return GST_FLOW_ERROR;
+ }
+
+ available = gst_adapter_available (sbcpay->adapter);
+
+ max_payload =
+ gst_rtp_buffer_calc_payload_len (GST_BASE_RTP_PAYLOAD_MTU (sbcpay) -
+ RTP_SBC_PAYLOAD_HEADER_SIZE, 0, 0);
+
+ max_payload = MIN (max_payload, available);
+
+ outbuf = gst_rtp_buffer_new_allocate (max_payload +
+ RTP_SBC_PAYLOAD_HEADER_SIZE, 0, 0);
+
+ gst_rtp_buffer_set_payload_type (outbuf, GST_BASE_RTP_PAYLOAD_PT (sbcpay));
+
+ data = gst_adapter_take (sbcpay->adapter, max_payload);
+ payload_data = gst_rtp_buffer_get_payload (outbuf);
+
+ payload = (struct rtp_payload *) payload_data;
+ memset (payload, 0, sizeof (struct rtp_payload));
+ payload->frame_count = max_payload / sbcpay->frame_length;
+
+ memcpy (payload_data + RTP_SBC_PAYLOAD_HEADER_SIZE, data, max_payload);
+ g_free (data);
+
+ /* FIXME - timestamp it! */
+ GST_DEBUG_OBJECT (sbcpay, "Pushing %d bytes", max_payload);
+
+ return gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (sbcpay), outbuf);
+}
+
+static GstFlowReturn
+gst_rtp_sbc_pay_handle_buffer (GstBaseRTPPayload * payload, GstBuffer * buffer)
+{
+ GstRtpSBCPay *sbcpay;
+ guint available;
+
+ sbcpay = GST_RTP_SBC_PAY (payload);
+ gst_adapter_push (sbcpay->adapter, gst_buffer_copy (buffer));
+
+ available = gst_adapter_available (sbcpay->adapter);
+ if (available + RTP_SBC_HEADER_TOTAL >=
+ GST_BASE_RTP_PAYLOAD_MTU (sbcpay) ||
+ (sbcpay->min_frames != -1 && available >
+ (sbcpay->min_frames * sbcpay->frame_length)))
+ return gst_rtp_sbc_pay_flush_buffers (sbcpay);
+
+ return GST_FLOW_OK;
+}
+
+static gboolean
+gst_rtp_sbc_pay_handle_event (GstPad * pad, GstEvent * event)
+{
+ GstRtpSBCPay *sbcpay = GST_RTP_SBC_PAY (GST_PAD_PARENT (pad));
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_EOS:
+ gst_rtp_sbc_pay_flush_buffers (sbcpay);
+ break;
+ default:
+ break;
+ }
+
+ return FALSE;
+}
+
+static void
+gst_rtp_sbc_pay_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_rtp_sbc_pay_sink_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_rtp_sbc_pay_src_factory));
+
+ gst_element_class_set_details (element_class, &gst_rtp_sbc_pay_details);
+}
+
+static void
+gst_rtp_sbc_pay_finalize (GObject * object)
+{
+ GstRtpSBCPay *sbcpay = GST_RTP_SBC_PAY (object);
+ g_object_unref (sbcpay->adapter);
+
+ GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
+}
+
+static void
+gst_rtp_sbc_pay_class_init (GstRtpSBCPayClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstBaseRTPPayloadClass *payload_class = GST_BASE_RTP_PAYLOAD_CLASS (klass);
+
+ gobject_class = G_OBJECT_CLASS (klass);
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_rtp_sbc_pay_finalize);
+ gobject_class->set_property =
+ GST_DEBUG_FUNCPTR (gst_rtp_sbc_pay_set_property);
+ gobject_class->get_property =
+ GST_DEBUG_FUNCPTR (gst_rtp_sbc_pay_get_property);
+
+ payload_class->set_caps = GST_DEBUG_FUNCPTR (gst_rtp_sbc_pay_set_caps);
+ payload_class->handle_buffer =
+ GST_DEBUG_FUNCPTR (gst_rtp_sbc_pay_handle_buffer);
+ payload_class->handle_event =
+ GST_DEBUG_FUNCPTR (gst_rtp_sbc_pay_handle_event);
+
+ /* properties */
+ g_object_class_install_property (G_OBJECT_CLASS (klass),
+ PROP_MIN_FRAMES,
+ g_param_spec_int ("min-frames", "minimum frame number",
+ "Minimum quantity of frames to send in one packet "
+ "(-1 for maximum allowed by the mtu)",
+ -1, G_MAXINT, DEFAULT_MIN_FRAMES, G_PARAM_READWRITE));
+
+ GST_DEBUG_CATEGORY_INIT (gst_rtp_sbc_pay_debug, "rtpsbcpay", 0,
+ "RTP SBC payloader");
+}
+
+static void
+gst_rtp_sbc_pay_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstRtpSBCPay *sbcpay;
+
+ sbcpay = GST_RTP_SBC_PAY (object);
+
+ switch (prop_id) {
+ case PROP_MIN_FRAMES:
+ sbcpay->min_frames = g_value_get_int (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_rtp_sbc_pay_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstRtpSBCPay *sbcpay;
+
+ sbcpay = GST_RTP_SBC_PAY (object);
+
+ switch (prop_id) {
+ case PROP_MIN_FRAMES:
+ g_value_set_int (value, sbcpay->min_frames);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_rtp_sbc_pay_init (GstRtpSBCPay * self, GstRtpSBCPayClass * klass)
+{
+ self->adapter = gst_adapter_new ();
+ self->frame_length = 0;
+
+ self->min_frames = DEFAULT_MIN_FRAMES;
+}
+
+gboolean
+gst_rtp_sbc_pay_plugin_init (GstPlugin * plugin)
+{
+ return gst_element_register (plugin, "rtpsbcpay",
+ GST_RANK_NONE, GST_TYPE_RTP_SBC_PAY);
+}
projects / platform / upstream / gstreamer.git / commitdiff