static gboolean
gst_rtp_celt_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
{
GstStructure *structure;
GstRtpCELTDepay *rtpceltdepay;
gint clock_rate, nb_channels = 0, frame_size = 0;
GstBuffer *buf;
GstMapInfo map;
guint8 *ptr;
const gchar *params;
GstCaps *srccaps;
gboolean res;
rtpceltdepay = GST_RTP_CELT_DEPAY (depayload);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
goto no_clockrate;
depayload->clock_rate = clock_rate;
if ((params = gst_structure_get_string (structure, "encoding-params")))
nb_channels = atoi (params);
if (!nb_channels)
nb_channels = DEFAULT_CHANNELS;
if ((params = gst_structure_get_string (structure, "frame-size")))
frame_size = atoi (params);
if (!frame_size)
frame_size = DEFAULT_FRAMESIZE;
rtpceltdepay->frame_size = frame_size;
GST_DEBUG_OBJECT (depayload, "clock-rate=%d channels=%d frame-size=%d",
clock_rate, nb_channels, frame_size);
/* construct minimal header and comment packet for the decoder */
buf = gst_buffer_new_and_alloc (60);
gst_buffer_map (buf, &map, GST_MAP_WRITE);
ptr = map.data;
memcpy (ptr, "CELT ", 8);
ptr += 8;
memcpy (ptr, "1.1.12", 7);
ptr += 20;
GST_WRITE_UINT32_LE (ptr, 0x80000006); /* version */
ptr += 4;
GST_WRITE_UINT32_LE (ptr, 56); /* header_size */
ptr += 4;
GST_WRITE_UINT32_LE (ptr, clock_rate); /* rate */
ptr += 4;
GST_WRITE_UINT32_LE (ptr, nb_channels); /* channels */
ptr += 4;
GST_WRITE_UINT32_LE (ptr, frame_size); /* frame-size */
ptr += 4;
GST_WRITE_UINT32_LE (ptr, -1); /* overlap */
ptr += 4;
GST_WRITE_UINT32_LE (ptr, -1); /* bytes_per_packet */
ptr += 4;
GST_WRITE_UINT32_LE (ptr, 0); /* extra headers */
gst_buffer_unmap (buf, &map);
srccaps = gst_caps_new_empty_simple ("audio/x-celt");
res = gst_pad_set_caps (depayload->srcpad, srccaps);
gst_caps_unref (srccaps);
gst_rtp_base_depayload_push (GST_RTP_BASE_DEPAYLOAD (rtpceltdepay), buf);
buf = gst_buffer_new_and_alloc (sizeof (gst_rtp_celt_comment));
gst_buffer_fill (buf, 0, gst_rtp_celt_comment, sizeof (gst_rtp_celt_comment));
gst_rtp_base_depayload_push (GST_RTP_BASE_DEPAYLOAD (rtpceltdepay), buf);
return res;
/* ERRORS */
no_clockrate:
{
GST_ERROR_OBJECT (depayload, "no clock-rate specified");
return FALSE;
}
}
static GstBuffer *
gst_rtp_celt_depay_process (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp)
{
GstBuffer *outbuf = NULL;
guint8 *payload;
guint offset, pos, payload_len, total_size, size;
guint8 s;
gint clock_rate = 0, frame_size = 0;
GstClockTime framesize_ns = 0, timestamp;
guint n = 0;
GstRtpCELTDepay *rtpceltdepay;
rtpceltdepay = GST_RTP_CELT_DEPAY (depayload);
clock_rate = depayload->clock_rate;
frame_size = rtpceltdepay->frame_size;
framesize_ns = gst_util_uint64_scale_int (frame_size, GST_SECOND, clock_rate);
timestamp = GST_BUFFER_PTS (rtp->buffer);
GST_LOG_OBJECT (depayload,
"got %" G_GSIZE_FORMAT " bytes, mark %d ts %u seqn %d",
gst_buffer_get_size (rtp->buffer), gst_rtp_buffer_get_marker (rtp),
gst_rtp_buffer_get_timestamp (rtp), gst_rtp_buffer_get_seq (rtp));
GST_LOG_OBJECT (depayload, "got clock-rate=%d, frame_size=%d, "
"_ns=%" GST_TIME_FORMAT ", timestamp=%" GST_TIME_FORMAT, clock_rate,
frame_size, GST_TIME_ARGS (framesize_ns), GST_TIME_ARGS (timestamp));
payload = gst_rtp_buffer_get_payload (rtp);
payload_len = gst_rtp_buffer_get_payload_len (rtp);
/* first count how many bytes are consumed by the size headers and make offset
* point to the first data byte */
total_size = 0;
offset = 0;
while (total_size < payload_len) {
do {
s = payload[offset++];
total_size += s + 1;
} while (s == 0xff);
}
/* offset is now pointing to the payload */
total_size = 0;
pos = 0;
while (total_size < payload_len) {
n++;
size = 0;
do {
s = payload[pos++];
size += s;
total_size += s + 1;
} while (s == 0xff);
outbuf = gst_rtp_buffer_get_payload_subbuffer (rtp, offset, size);
offset += size;
if (frame_size != -1 && clock_rate != -1) {
GST_BUFFER_PTS (outbuf) = timestamp + framesize_ns * n;
GST_BUFFER_DURATION (outbuf) = framesize_ns;
}
GST_LOG_OBJECT (depayload, "push timestamp=%"
GST_TIME_FORMAT ", duration=%" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_PTS (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
gst_rtp_drop_meta (GST_ELEMENT_CAST (depayload), outbuf,
g_quark_from_static_string (GST_META_TAG_AUDIO_STR));
gst_rtp_base_depayload_push (depayload, outbuf);
}
return NULL;
}
static gboolean
gst_rtp_celt_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
{
GstStructure *structure;
GstRtpCELTDepay *rtpceltdepay;
gint clock_rate, nb_channels, frame_size;
GstBuffer *buf;
guint8 *data;
const gchar *params;
GstCaps *srccaps;
gboolean res;
rtpceltdepay = GST_RTP_CELT_DEPAY (depayload);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
goto no_clockrate;
depayload->clock_rate = clock_rate;
if (!(params = gst_structure_get_string (structure, "encoding-params")))
nb_channels = 1;
else {
nb_channels = atoi (params);
}
if (!(params = gst_structure_get_string (structure, "frame-size")))
frame_size = 480;
else {
frame_size = atoi (params);
}
/* construct minimal header and comment packet for the decoder */
buf = gst_buffer_new_and_alloc (60);
data = GST_BUFFER_DATA (buf);
memcpy (data, "CELT ", 8);
data += 8;
memcpy (data, "1.1.12", 7);
data += 20;
GST_WRITE_UINT32_LE (data, 0x80000006); /* version */
data += 4;
GST_WRITE_UINT32_LE (data, 56); /* header_size */
data += 4;
GST_WRITE_UINT32_LE (data, clock_rate); /* rate */
data += 4;
GST_WRITE_UINT32_LE (data, nb_channels); /* channels */
data += 4;
GST_WRITE_UINT32_LE (data, frame_size); /* frame-size */
data += 4;
GST_WRITE_UINT32_LE (data, -1); /* overlap */
data += 4;
GST_WRITE_UINT32_LE (data, -1); /* bytes_per_packet */
data += 4;
GST_WRITE_UINT32_LE (data, 0); /* extra headers */
srccaps = gst_caps_new_simple ("audio/x-celt", NULL);
res = gst_pad_set_caps (depayload->srcpad, srccaps);
gst_caps_unref (srccaps);
gst_buffer_set_caps (buf, GST_PAD_CAPS (depayload->srcpad));
gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpceltdepay), buf);
buf = gst_buffer_new_and_alloc (sizeof (gst_rtp_celt_comment));
memcpy (GST_BUFFER_DATA (buf), gst_rtp_celt_comment,
sizeof (gst_rtp_celt_comment));
gst_buffer_set_caps (buf, GST_PAD_CAPS (depayload->srcpad));
gst_base_rtp_depayload_push (GST_BASE_RTP_DEPAYLOAD (rtpceltdepay), buf);
return res;
/* ERRORS */
no_clockrate:
{
GST_DEBUG_OBJECT (depayload, "no clock-rate specified");
return FALSE;
}
}
