diff options
Diffstat (limited to 'src/libbsc/bsc_api.c')
| -rw-r--r-- | src/libbsc/bsc_api.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/src/libbsc/bsc_api.c b/src/libbsc/bsc_api.c index 142efef02..19859cf8a 100644 --- a/src/libbsc/bsc_api.c +++ b/src/libbsc/bsc_api.c @@ -296,16 +296,17 @@ static int chan_compat_with_mode(struct gsm_lchan *lchan, int chan_mode, int ful } } -/** - * Send a GSM08.08 Assignment Request. Right now this does not contain the - * audio codec type or the allowed rates for the config. It is assumed that - * this is for audio handling only. In case the current channel does not allow - * the selected mode a new one will be allocated. - * - * TODO: Add multirate configuration, make it work for more than audio. - */ +/*! Send a GSM08.08 Assignment Request. Right now this does not contain the + * audio codec type or the allowed rates for the config. In case the current + * channel does not allow the selected mode a new one will be allocated. + * \param[out] conn related subscriber connection + * \param[in] chan_mode mode of the channel (see enum gsm48_chan_mode) + * \param[in] full_rate select full rate or half rate channel + * \returns 0 on success, 1 when no operation is neccessary, -1 on failure */ int gsm0808_assign_req(struct gsm_subscriber_connection *conn, int chan_mode, int full_rate) { + /* TODO: Add multirate configuration, make it work for more than audio. */ + struct bsc_api *api; api = conn->network->bsc_api; @@ -313,6 +314,11 @@ int gsm0808_assign_req(struct gsm_subscriber_connection *conn, int chan_mode, in if (handle_new_assignment(conn, chan_mode, full_rate) != 0) goto error; } else { + /* Check if the channel is already in the requested mode, if + * yes, we skip unnecessary channel mode modify operations. */ + if (conn->lchan->tch_mode == chan_mode) + return 1; + if (chan_mode == GSM48_CMODE_SPEECH_AMR) handle_mr_config(conn, conn->lchan, full_rate); |