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2a9ba66922
At the moment we open an E1 timeslot when needed, but we never close it even when it is not needed anymore. This may block other entities from using it. Lets add some logic to detect whether the E1 timeslot is still needed and make sure that it is closed when it is no longer needed. Depends: libosmo-abis.git I073cfaba0d5073447842f22665e213135ea3f635 Change-Id: Ie6a32abbc5cd984f6d72a384e3b47c1b82ce7058 Related: OS#5198
28 lines
1.4 KiB
C
28 lines
1.4 KiB
C
#pragma once
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/* A 64k timeslot on an E1 line can be subdevied into the following
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* subslot combinations:
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*
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* subslot: offset:
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* [ ][ ][ 16k ][8k_subslot] 0
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* [ ][ 32k ][_subslot__][8k_subslot] 1
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* [ ][ subslot ][ 16k ][8k_subslot] 2
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* [ 64k ][__________][_subslot__][8k_subslot] 3
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* [ timeslot ][ ][ 16k ][8k_subslot] 4
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* [ ][ 32K ][_subslot__][8k_subslot] 5
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* [ ][ subslot ][ 16k ][8k_subslot] 6
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* [ ][ ][ subslot ][8k_subslot] 7
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*
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* Since overlapping assignment of subslots is not possible there is a limited
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* set of subslot assignments possible. The e1_rates array lists the possible
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* assignments as depicted above. Also each subslot assignment comes along with
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* a bit offset in the E1 bitstream. The e1_offsets arrays lists the bit
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* offsets. */
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static const uint8_t e1_rates[] = { 64, 32, 32, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 8, 8 };
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static const uint8_t e1_offsets[] = { 0, 0, 4, 0, 2, 4, 6, 0, 1, 2, 3, 4, 5, 6, 7 };
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int mgcp_e1_endp_equip(struct mgcp_endpoint *endp, uint8_t ts, uint8_t ss, uint8_t offs);
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void mgcp_e1_endp_update(struct mgcp_endpoint *endp);
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void mgcp_e1_endp_release(struct mgcp_endpoint *endp, uint8_t ts);
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int mgcp_e1_send_rtp(struct mgcp_endpoint *endp, struct mgcp_rtp_codec *codec, struct msgb *msg);
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