<p>dexter has uploaded this change for <strong>review</strong>.</p><p><a href="https://gerrit.osmocom.org/c/libosmocore/+/17325">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">parity: add amr crc14 definition<br><br>AMR not only specifies a 6 bit CRC for regular voice information. It also<br>specifies a 16 bit CRC to protect the comfort noise updates contained in<br>the SID_UPDATE frames.<br><br>Change-Id: I5cfd8ca806aba8d42cb9787f69605cea7de6e900<br>Related: OS#2978<br>---<br>M include/osmocom/coding/gsm0503_parity.h<br>M src/coding/gsm0503_parity.c<br>M src/coding/libosmocoding.map<br>3 files changed, 13 insertions(+), 0 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/25/17325/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/include/osmocom/coding/gsm0503_parity.h b/include/osmocom/coding/gsm0503_parity.h</span><br><span>index 28a5444..c35477f 100644</span><br><span>--- a/include/osmocom/coding/gsm0503_parity.h</span><br><span>+++ b/include/osmocom/coding/gsm0503_parity.h</span><br><span>@@ -19,5 +19,6 @@</span><br><span> const struct osmo_crc8gen_code gsm0503_tch_fr_crc3;</span><br><span> const struct osmo_crc8gen_code gsm0503_tch_efr_crc8;</span><br><span> const struct osmo_crc8gen_code gsm0503_amr_crc6;</span><br><span style="color: hsl(120, 100%, 40%);">+const struct osmo_crc16gen_code gsm0503_amr_crc14;</span><br><span> </span><br><span> /*! @} */</span><br><span>diff --git a/src/coding/gsm0503_parity.c b/src/coding/gsm0503_parity.c</span><br><span>index 874114f..a8daacc 100644</span><br><span>--- a/src/coding/gsm0503_parity.c</span><br><span>+++ b/src/coding/gsm0503_parity.c</span><br><span>@@ -134,4 +134,15 @@</span><br><span>     .remainder = 0x3f,</span><br><span> };</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+/*! GSM AMR parity (SID_UPDATE)</span><br><span style="color: hsl(120, 100%, 40%);">+ *</span><br><span style="color: hsl(120, 100%, 40%);">+ * g(x) = x^14 + x^13 + x^5 + x^3 + x^2 + 1</span><br><span style="color: hsl(120, 100%, 40%);">+ */</span><br><span style="color: hsl(120, 100%, 40%);">+const struct osmo_crc16gen_code gsm0503_amr_crc14 = {</span><br><span style="color: hsl(120, 100%, 40%);">+    .bits = 14,</span><br><span style="color: hsl(120, 100%, 40%);">+   .poly = 0x202d,</span><br><span style="color: hsl(120, 100%, 40%);">+       .init = 0x0000,</span><br><span style="color: hsl(120, 100%, 40%);">+       .remainder = 0x3fff,</span><br><span style="color: hsl(120, 100%, 40%);">+};</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> /*! @} */</span><br><span>diff --git a/src/coding/libosmocoding.map b/src/coding/libosmocoding.map</span><br><span>index 87b3886..7f88111 100644</span><br><span>--- a/src/coding/libosmocoding.map</span><br><span>+++ b/src/coding/libosmocoding.map</span><br><span>@@ -56,6 +56,7 @@</span><br><span> gsm0503_tch_fr_crc3;</span><br><span> gsm0503_tch_efr_crc8;</span><br><span> gsm0503_amr_crc6;</span><br><span style="color: hsl(120, 100%, 40%);">+gsm0503_amr_crc14;</span><br><span> </span><br><span> gsm0503_xcch_burst_unmap;</span><br><span> gsm0503_xcch_burst_map;</span><br><span></span><br></pre><p>To view, visit <a href="https://gerrit.osmocom.org/c/libosmocore/+/17325">change 17325</a>. To unsubscribe, or for help writing mail filters, visit <a href="https://gerrit.osmocom.org/settings">settings</a>.</p><div itemscope itemtype="http://schema.org/EmailMessage"><div itemscope itemprop="action" itemtype="http://schema.org/ViewAction"><link itemprop="url" href="https://gerrit.osmocom.org/c/libosmocore/+/17325"/><meta itemprop="name" content="View Change"/></div></div>

<div style="display:none"> Gerrit-Project: libosmocore </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-Change-Id: I5cfd8ca806aba8d42cb9787f69605cea7de6e900 </div>
<div style="display:none"> Gerrit-Change-Number: 17325 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: dexter <pmaier@sysmocom.de> </div>
<div style="display:none"> Gerrit-MessageType: newchange </div>