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; } }