*/
/**
* SECTION:element-rtpdtmfdepay
+ * @title: rtpdtmfdepay
* @see_also: rtpdtmfsrc, rtpdtmfmux
*
* This element takes RTP DTMF packets and produces sound. It also emits a
* message on the #GstBus.
*
- * The message is called "dtmf-event" and has the following fields
- * <informaltable>
- * <tgroup cols='4'>
- * <colspec colname='Name' />
- * <colspec colname='Type' />
- * <colspec colname='Possible values' />
- * <colspec colname='Purpose' />
- * <thead>
- * <row>
- * <entry>Name</entry>
- * <entry>GType</entry>
- * <entry>Possible values</entry>
- * <entry>Purpose</entry>
- * </row>
- * </thead>
- * <tbody>
- * <row>
- * <entry>type</entry>
- * <entry>G_TYPE_INT</entry>
- * <entry>0-1</entry>
- * <entry>Which of the two methods
- * specified in RFC 2833 to use. The value should be 0 for tones and 1 for
- * named events. Tones are specified by their frequencies and events are specied
- * by their number. This element currently only recognizes events.
- * Do not confuse with "method" which specified the output.
- * </entry>
- * </row>
- * <row>
- * <entry>number</entry>
- * <entry>G_TYPE_INT</entry>
- * <entry>0-16</entry>
- * <entry>The event number.</entry>
- * </row>
- * <row>
- * <entry>volume</entry>
- * <entry>G_TYPE_INT</entry>
- * <entry>0-36</entry>
- * <entry>This field describes the power level of the tone, expressed in dBm0
- * after dropping the sign. Power levels range from 0 to -63 dBm0. The range of
- * valid DTMF is from 0 to -36 dBm0.
- * </entry>
- * </row>
- * <row>
- * <entry>method</entry>
- * <entry>G_TYPE_INT</entry>
- * <entry>1</entry>
- * <entry>This field will always been 1 (ie RTP event) from this element.
- * </entry>
- * </row>
- * </tbody>
- * </tgroup>
- * </informaltable>
+ * The message is called "dtmf-event" and has the following fields:
+ *
+ * * `type` (G_TYPE_INT, 0-1): Which of the two methods
+ * specified in RFC 2833 to use. The value should be 0 for tones and 1 for
+ * named events. Tones are specified by their frequencies and events are specified
+ * by their number. This element currently only recognizes events.
+ * Do not confuse with "method" which specified the output.
+ *
+ * * `number` (G_TYPE_INT, 0-16): The event number.
+ *
+ * * `volume` (G_TYPE_INT, 0-36): This field describes the power level of the tone, expressed in dBm0
+ * after dropping the sign. Power levels range from 0 to -63 dBm0. The range of
+ * valid DTMF is from 0 to -36 dBm0.
+ *
+ * * `method` (G_TYPE_INT, 1): This field will always been 1 (ie RTP event) from this element.
*/
#ifdef HAVE_CONFIG_H
#include <math.h>
#include <gst/audio/audio.h>
+#include <gst/base/gstbitreader.h>
#include <gst/rtp/gstrtpbuffer.h>
#define DEFAULT_PACKET_INTERVAL 50 /* ms */
typedef struct st_dtmf_key
{
- const char *event_name;
- int event_encoding;
float low_frequency;
float high_frequency;
} DTMF_KEY;
static const DTMF_KEY DTMF_KEYS[] = {
- {"DTMF_KEY_EVENT_0", 0, 941, 1336},
- {"DTMF_KEY_EVENT_1", 1, 697, 1209},
- {"DTMF_KEY_EVENT_2", 2, 697, 1336},
- {"DTMF_KEY_EVENT_3", 3, 697, 1477},
- {"DTMF_KEY_EVENT_4", 4, 770, 1209},
- {"DTMF_KEY_EVENT_5", 5, 770, 1336},
- {"DTMF_KEY_EVENT_6", 6, 770, 1477},
- {"DTMF_KEY_EVENT_7", 7, 852, 1209},
- {"DTMF_KEY_EVENT_8", 8, 852, 1336},
- {"DTMF_KEY_EVENT_9", 9, 852, 1477},
- {"DTMF_KEY_EVENT_S", 10, 941, 1209},
- {"DTMF_KEY_EVENT_P", 11, 941, 1477},
- {"DTMF_KEY_EVENT_A", 12, 697, 1633},
- {"DTMF_KEY_EVENT_B", 13, 770, 1633},
- {"DTMF_KEY_EVENT_C", 14, 852, 1633},
- {"DTMF_KEY_EVENT_D", 15, 941, 1633},
+ {941, 1336},
+ {697, 1209},
+ {697, 1336},
+ {697, 1477},
+ {770, 1209},
+ {770, 1336},
+ {770, 1477},
+ {852, 1209},
+ {852, 1336},
+ {852, 1477},
+ {941, 1209},
+ {941, 1477},
+ {697, 1633},
+ {770, 1633},
+ {852, 1633},
+ {941, 1633},
};
#define MAX_DTMF_EVENTS 16
enum
{
-
-
/* FILL ME */
LAST_SIGNAL
};
PROP_MAX_DURATION
};
-enum
-{
- ARG_0
-};
-
static GstStaticPadTemplate gst_rtp_dtmf_depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
G_DEFINE_TYPE (GstRtpDTMFDepay, gst_rtp_dtmf_depay,
GST_TYPE_RTP_BASE_DEPAYLOAD);
+GST_ELEMENT_REGISTER_DEFINE (rtpdtmfdepay, "rtpdtmfdepay", GST_RANK_MARGINAL,
+ GST_TYPE_RTP_DTMF_DEPAY);
static void gst_rtp_dtmf_depay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
gstelement_class = GST_ELEMENT_CLASS (klass);
gstrtpbasedepayload_class = GST_RTP_BASE_DEPAYLOAD_CLASS (klass);
- gst_element_class_add_pad_template (gstelement_class,
- gst_static_pad_template_get (&gst_rtp_dtmf_depay_src_template));
- gst_element_class_add_pad_template (gstelement_class,
- gst_static_pad_template_get (&gst_rtp_dtmf_depay_sink_template));
+ gst_element_class_add_static_pad_template (gstelement_class,
+ &gst_rtp_dtmf_depay_src_template);
+ gst_element_class_add_static_pad_template (gstelement_class,
+ &gst_rtp_dtmf_depay_sink_template);
GST_DEBUG_CATEGORY_INIT (gst_rtp_dtmf_depay_debug,
"rtpdtmfdepay", 0, "rtpdtmfdepay element");
double amplitude, f1, f2;
double volume_factor;
DTMF_KEY key = DTMF_KEYS[payload.event];
- guint32 clock_rate = 8000 /* default */ ;
+ guint32 clock_rate;
GstRTPBaseDepayload *depayload = GST_RTP_BASE_DEPAYLOAD (rtpdtmfdepay);
gint volume;
static GstAllocationParams params = { 0, 1, 0, 0, };
GstRtpDTMFDepay *rtpdtmfdepay = NULL;
GstBuffer *outbuf = NULL;
- gint payload_len;
+ guint payload_len;
guint8 *payload = NULL;
guint32 timestamp;
GstRTPDTMFPayload dtmf_payload;
GstStructure *structure = NULL;
GstMessage *dtmf_message = NULL;
GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
+ GstBitReader bitreader;
rtpdtmfdepay = GST_RTP_DTMF_DEPAY (depayload);
payload_len = gst_rtp_buffer_get_payload_len (&rtpbuffer);
payload = gst_rtp_buffer_get_payload (&rtpbuffer);
- if (payload_len != sizeof (GstRTPDTMFPayload))
+ if (payload_len != 4)
goto bad_packet;
- memcpy (&dtmf_payload, payload, sizeof (GstRTPDTMFPayload));
+ gst_bit_reader_init (&bitreader, payload, payload_len);
+ gst_bit_reader_get_bits_uint8 (&bitreader, &dtmf_payload.event, 8);
+ gst_bit_reader_skip (&bitreader, 2);
+ gst_bit_reader_get_bits_uint8 (&bitreader, &dtmf_payload.volume, 6);
+ gst_bit_reader_get_bits_uint16 (&bitreader, &dtmf_payload.duration, 16);
if (dtmf_payload.event > MAX_EVENT)
goto bad_packet;
timestamp = gst_rtp_buffer_get_timestamp (&rtpbuffer);
- dtmf_payload.duration = g_ntohs (dtmf_payload.duration);
-
/* clip to whole units of unit_time */
if (rtpdtmfdepay->unit_time) {
guint unit_time_clock =
return NULL;
}
-
-gboolean
-gst_rtp_dtmf_depay_plugin_init (GstPlugin * plugin)
-{
- return gst_element_register (plugin, "rtpdtmfdepay",
- GST_RANK_MARGINAL, GST_TYPE_RTP_DTMF_DEPAY);
-}
projects / platform / upstream / gstreamer.git / blobdiff