gsm0808: add default speech codec configuration

In an AoIP scenario, the speech codec list field specifies the
codecs used in the RTP interface. This patch adds a table
with default codec configurations that match the codec
configurations that are also used on the air interface.

Change-Id: I9dc0165d76a022b2c1b7418bc3133407e61b7261
This commit is contained in:
Philipp Maier 2017-06-02 11:25:28 +02:00 committed by Harald Welte
parent bb8396690e
commit a9b9276948
1 changed files with 21 additions and 0 deletions

View File

@ -449,6 +449,27 @@ struct gsm0808_speech_codec {
uint16_t cfg;
};
/*! \brief Default speech codec configurations: Some codecs specified with
* struct gsm0808_speech_codec, require a configuration (cfg). The following
* default configuration will configure the codec (RTP) to match the
* configuration that is used on the air interface (Um).
*
* Default values for FR_AMR, HR_AMR and OHR_AMR:
* See also: 3GPP TS 28.062, Table 7.11.3.1.3-2: Preferred
* Configurations for the Adaptive Multi-Rate Codec Types
*
* Default values for FR_AMR_WB, OFR_AMR_WB and OHR_AMR_WB:
* See also: 3GPP TS 26.103, Table 5.7-1: Allowed Configurations
* for the Adaptive Multi-Rate - Wideband Codec Types */
enum gsm0808_speech_codec_defaults {
GSM0808_SC_CFG_DEFAULT_FR_AMR = 0xffff,
GSM0808_SC_CFG_DEFAULT_HR_AMR = 0x073f,
GSM0808_SC_CFG_DEFAULT_OHR_AMR = 0xffff,
GSM0808_SC_CFG_DEFAULT_FR_AMR_WB = 0x01,
GSM0808_SC_CFG_DEFAULT_OFR_AMR_WB = 0x3f,
GSM0808_SC_CFG_DEFAULT_OHR_AMR_WB = 0x01,
};
/* 3GPP TS 48.008 3.2.2.103 Speech Codec List */
#define SPEECH_CODEC_MAXLEN 255
struct gsm0808_speech_codec_list {