cellular-infrastructure
/
osmo-msc
mirror of https://gerrit.osmocom.org/osmo-msc
9
0
Fork 0
Code Issues Releases Wiki Activity

only first AMR mode-set wip 

Change-Id: I66d7822357648c5eb8e2edf27f4f6ce31f4091b4
This commit is contained in:
Neels Hofmeyr 2024-02-04 07:39:00 +01:00
parent e72a58d4bf
commit d70e0e355f
1 changed files with 17 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/libmsc/ran_msg_iu.c
View File

@ -357,29 +357,39 @@ static uint32_t gsm0808_cfg_to_rab_modes(bool full_rate, uint16_t cfg)
return rab_modes;
}
/* Combine all the AMR cfg bits across the codecs */
static const struct sdp_audio_codec *first_amr(const struct sdp_audio_codecs *codecs)
{
const struct sdp_audio_codec *c;
sdp_audio_codecs_foreach (c, codecs) {
if (!strcmp("AMR", c->subtype_name))
return c;
}
return NULL;
}
/* Get the RAB modes (AMR rates) from the first AMR codec in this list */
static uint32_t codecs_to_rab_modes(const struct sdp_audio_codecs *codecs)
{
const struct sdp_audio_codec *c;
struct gsm0808_speech_codec_list scl = {};
int i;
uint32_t rab_modes = 0;
sdp_audio_codecs_to_speech_codec_list(&scl, codecs);
c = first_amr(codecs);
if (!c)
return 0;
sdp_audio_codec_to_speech_codec_list(&scl, c);
for (i = 0; i < scl.len; i++) {
bool amr = false;
bool fr = false;
switch (scl.codec[i].type) {
case GSM0808_SCT_FR3:
amr = true;
fr = true;
break;
case GSM0808_SCT_HR3:
amr = true;
break;
default:
break;
}
if (amr)
rab_modes |= gsm0808_cfg_to_rab_modes(fr, scl.codec[i].cfg);
rab_modes |= gsm0808_cfg_to_rab_modes(fr, scl.codec[i].cfg);
}
return rab_modes;
}