Add TCH/H decoder block with AMR multirate support
Add new TCHH channel mode
Add two new optional arguments
-m CHAN_MODE, --mode=CHAN_MODE
Channel mode. Valid options are 'BCCH' (Non-combined
C0), 'BCCH_SDCCH4'(Combined C0), 'SDCCH8' (Stand-alone
control channel) 'TCHF' (Traffic Channel, Full rate),
'TCHH' (Traffic Channel, Half rate)
--sub-channel=TCH_H_CHANNEL
TCH/H sub-channel. [default=0]
--multi-rate=MULTI_RATE
The MultiRrate configuration element from the
Assigment Command message. Example: 28111a40. See 3GPP
TS 44.018 - 10.5.2.21aa MultiRate configuration
Example:
grgsm_decode -m TCHH --sub-channel 0 --multi-rate 2811 -o voice.amr ...
diff --git a/lib/decoding/tch_h_decoder_impl.h b/lib/decoding/tch_h_decoder_impl.h
new file mode 100644
index 0000000..902b216
--- /dev/null
+++ b/lib/decoding/tch_h_decoder_impl.h
@@ -0,0 +1,60 @@
+/* -*- c++ -*- */
+/*
+ * @file
+ * @author (C) 2018 by Vasil Velichkov <vvvelichkov@gmail.com>
+ * @section LICENSE
+ *
+ * Gr-gsm is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * Gr-gsm 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with gr-gsm; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GSM_TCH_H_DECODER_IMPL_H
+#define INCLUDED_GSM_TCH_H_DECODER_IMPL_H
+
+#include <grgsm/decoding/tch_h_decoder.h>
+#include "tch_f_decoder_impl.h"
+
+namespace gr {
+ namespace gsm {
+
+ class tch_h_decoder_impl : public tch_h_decoder
+ {
+ private:
+ unsigned int d_collected_bursts_num;
+ pmt::pmt_t d_bursts[8];
+
+ enum tch_mode d_tch_mode;
+ unsigned int d_sub_channel;
+
+ std::vector<uint8_t> d_multi_rate_codes;
+
+ bool d_boundary_check;
+ bool d_boundary_decode;
+ bool d_header_sent;
+
+ uint8_t d_ft;
+ uint8_t d_cmr;
+
+ void decode(pmt::pmt_t msg);
+ public:
+ tch_h_decoder_impl(unsigned int sub_channel, std::string multi_rate, bool boundary_check=false);
+ ~tch_h_decoder_impl();
+ };
+
+ } // namespace gsm
+} // namespace gr
+
+#endif /* INCLUDED_GSM_TCH_H_DECODER_IMPL_H */
+