fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/libosmocore/+/35587?usp=email ) Change subject: isdn: add a lookup table with E1/E2/E3 bits from Table 5/V.110 ...................................................................... isdn: add a lookup table with E1/E2/E3 bits from Table 5/V.110 Let's make those E1/E2/E3 bit combinations publicly available in form of a lookup table (key is enum osmo_v100_sync_ra1_rate). Add convenience macros for setting and comparing these bits. This lookup table will be used by osmocom-bb.git. Change-Id: I6d2f8e250df31c233a2741163113dc07515409ae Related: OS#4396 --- M include/osmocom/isdn/v110.h M src/isdn/libosmoisdn.map M src/isdn/v110.c 3 files changed, 57 insertions(+), 27 deletions(-) git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/87/35587/1 diff --git a/include/osmocom/isdn/v110.h b/include/osmocom/isdn/v110.h index 4c1214c..9555932 100644 --- a/include/osmocom/isdn/v110.h +++ b/include/osmocom/isdn/v110.h @@ -39,6 +39,13 @@ _NUM_OSMO_V110_SYNC_RA1 }; +extern const ubit_t osmo_v110_e1e2e3[_NUM_OSMO_V110_SYNC_RA1][3]; + +#define osmo_v110_e1e2e3_set(e_bits, rate) \ + memcpy(e_bits, osmo_v110_e1e2e3[rate], 3) +#define osmo_v110_e1e2e3_cmp(e_bits, rate) \ + memcmp(e_bits, osmo_v110_e1e2e3[rate], 3) + int osmo_v110_sync_ra1_get_user_data_chunk_bitlen(enum osmo_v100_sync_ra1_rate rate); int osmo_v110_sync_ra1_get_user_data_rate(enum osmo_v100_sync_ra1_rate rate); int osmo_v110_sync_ra1_get_intermediate_rate(enum osmo_v100_sync_ra1_rate rate); diff --git a/src/isdn/libosmoisdn.map b/src/isdn/libosmoisdn.map index fe6628b..8f34f0d 100644 --- a/src/isdn/libosmoisdn.map +++ b/src/isdn/libosmoisdn.map @@ -27,6 +27,7 @@ osmo_v110_decode_frame; osmo_v110_encode_frame; osmo_v110_ubit_dump; +osmo_v110_e1e2e3; osmo_v110_sync_ra1_get_user_data_chunk_bitlen; osmo_v110_sync_ra1_get_user_data_rate; osmo_v110_sync_ra1_get_intermediate_rate; diff --git a/src/isdn/v110.c b/src/isdn/v110.c index 46962bf..b4bc4e3 100644 --- a/src/isdn/v110.c +++ b/src/isdn/v110.c @@ -143,6 +143,22 @@ /* I actually couldn't find any reference as to the value of F(ill) bits */ #define F 1 +/*! E1/E2/E3 bit values as per Table 5/V.110 */ +const ubit_t osmo_v110_e1e2e3[_NUM_OSMO_V110_SYNC_RA1][3] = { + [OSMO_V110_SYNC_RA1_600] = { 1, 0, 0 }, + [OSMO_V110_SYNC_RA1_1200] = { 0, 1, 0 }, + [OSMO_V110_SYNC_RA1_2400] = { 1, 1, 0 }, + [OSMO_V110_SYNC_RA1_4800] = { 0, 1, 1 }, + [OSMO_V110_SYNC_RA1_7200] = { 1, 0, 1 }, + [OSMO_V110_SYNC_RA1_9600] = { 0, 1, 1 }, + [OSMO_V110_SYNC_RA1_12000] = { 0, 0, 1 }, + [OSMO_V110_SYNC_RA1_14400] = { 1, 0, 1 }, + [OSMO_V110_SYNC_RA1_19200] = { 0, 1, 1 }, + [OSMO_V110_SYNC_RA1_24000] = { 0, 0, 1 }, + [OSMO_V110_SYNC_RA1_28800] = { 1, 0, 1 }, + [OSMO_V110_SYNC_RA1_38400] = { 0, 1, 1 }, +}; + /*! Adapt from 6 synchronous 600bit/s input bits to a decoded V.110 frame. * \param[out] fr caller-allocated output frame to which E+D bits are stored * \param[in] d_in input user bits @@ -154,9 +170,7 @@ return -EINVAL; /* Table 6a / V.110 */ - fr->e_bits[0] = 1; - fr->e_bits[1] = 0; - fr->e_bits[2] = 0; + osmo_v110_e1e2e3_set(fr->e_bits, OSMO_V110_SYNC_RA1_600); for (int i = 0; i < 6; i++) memset(fr->d_bits + i*8, d_in[i], 8); @@ -168,7 +182,7 @@ if (out_len < 6) return -ENOSPC; - if (fr->e_bits[0] != 1 || fr->e_bits[1] != 0 || fr->e_bits[2] != 0) + if (osmo_v110_e1e2e3_cmp(fr->e_bits, OSMO_V110_SYNC_RA1_600)) return -EINVAL; for (int i = 0; i < 6; i++) { @@ -190,9 +204,7 @@ return -EINVAL; /* Table 6b / V.110 */ - fr->e_bits[0] = 0; - fr->e_bits[1] = 1; - fr->e_bits[2] = 0; + osmo_v110_e1e2e3_set(fr->e_bits, OSMO_V110_SYNC_RA1_1200); for (int i = 0; i < 12; i++) memset(fr->d_bits + i*4, d_in[i], 4); @@ -204,7 +216,7 @@ if (out_len < 12) return -ENOSPC; - if (fr->e_bits[0] != 0 || fr->e_bits[1] != 1 || fr->e_bits[2] != 0) + if (osmo_v110_e1e2e3_cmp(fr->e_bits, OSMO_V110_SYNC_RA1_1200)) return -EINVAL; for (int i = 0; i < 12; i++) { @@ -226,9 +238,7 @@ return -EINVAL; /* Table 6c / V.110 */ - fr->e_bits[0] = 1; - fr->e_bits[1] = 1; - fr->e_bits[2] = 0; + osmo_v110_e1e2e3_set(fr->e_bits, OSMO_V110_SYNC_RA1_2400); for (int i = 0; i < 24; i++) { fr->d_bits[i*2 + 0] = d_in[i]; fr->d_bits[i*2 + 1] = d_in[i]; @@ -243,7 +253,7 @@ return -ENOSPC; /* Table 6c / V.110 */ - if (fr->e_bits[0] != 1 || fr->e_bits[1] != 1 || fr->e_bits[2] != 0) + if (osmo_v110_e1e2e3_cmp(fr->e_bits, OSMO_V110_SYNC_RA1_2400)) return -EINVAL; for (int i = 0; i < 24; i++) { @@ -266,10 +276,8 @@ if (in_len != 36) return -EINVAL; - /* Table 6d / V.110 */ - fr->e_bits[0] = 1; - fr->e_bits[1] = 0; - fr->e_bits[2] = 1; + /* Table 6d / V.110 (7200 is one of Nx3600) */ + osmo_v110_e1e2e3_set(fr->e_bits, OSMO_V110_SYNC_RA1_7200); memcpy(fr->d_bits + d_idx, d_in + 0, 10); d_idx += 10; /* D1..D10 */ memset(fr->d_bits + d_idx, F, 2); d_idx += 2; @@ -297,7 +305,8 @@ if (out_len < 36) return -ENOSPC; - if (fr->e_bits[0] != 1 || fr->e_bits[1] != 0 || fr->e_bits[2] != 1) + /* Table 6d / V.110 (7200 is one of Nx3600) */ + if (osmo_v110_e1e2e3_cmp(fr->e_bits, OSMO_V110_SYNC_RA1_7200)) return -EINVAL; memcpy(d_out + 0, fr->d_bits + d_idx, 10); d_idx += 10; /* D1..D10 */ @@ -330,10 +339,8 @@ if (in_len != 48) return -EINVAL; - /* Table 6e / V.110 */ - fr->e_bits[0] = 0; - fr->e_bits[1] = 1; - fr->e_bits[2] = 1; + /* Table 6e / V.110 (4800 is one of Nx4800) */ + osmo_v110_e1e2e3_set(fr->e_bits, OSMO_V110_SYNC_RA1_4800); memcpy(fr->d_bits, d_in, 48); @@ -345,7 +352,8 @@ if (out_len < 48) return -ENOSPC; - if (fr->e_bits[0] != 0 || fr->e_bits[1] != 1 || fr->e_bits[2] != 1) + /* Table 6e / V.110 (4800 is one of Nx4800) */ + if (osmo_v110_e1e2e3_cmp(fr->e_bits, OSMO_V110_SYNC_RA1_4800)) return -EINVAL; memcpy(d_out, fr->d_bits, 48); @@ -365,10 +373,8 @@ if (in_len != 30) return -EINVAL; - /* Table 6f / V.110 */ - fr->e_bits[0] = 0; - fr->e_bits[1] = 0; - fr->e_bits[2] = 1; + /* Table 6f / V.110 (12000 is one of Nx12000) */ + osmo_v110_e1e2e3_set(fr->e_bits, OSMO_V110_SYNC_RA1_12000); memcpy(fr->d_bits + d_idx, d_in + 0, 10); d_idx += 10; /* D1..D10 */ memset(fr->d_bits + d_idx, F, 2); d_idx += 2; @@ -399,7 +405,8 @@ if (out_len < 30) return -ENOSPC; - if (fr->e_bits[0] != 0 || fr->e_bits[1] != 0 || fr->e_bits[2] != 1) + /* Table 6f / V.110 (12000 is one of Nx12000) */ + if (osmo_v110_e1e2e3_cmp(fr->e_bits, OSMO_V110_SYNC_RA1_12000)) return -EINVAL; memcpy(d_out + 0, fr->d_bits + d_idx, 10); d_idx += 10; /* D1..D10 */ -- To view, visit https://gerrit.osmocom.org/c/libosmocore/+/35587?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: libosmocore Gerrit-Branch: master Gerrit-Change-Id: I6d2f8e250df31c233a2741163113dc07515409ae Gerrit-Change-Number: 35587 Gerrit-PatchSet: 1 Gerrit-Owner: fixeria &lt;vyanitskiy(a)sysmocom.de&gt; Gerrit-MessageType: newchange