#include <stdint.h>
#include <stdbool.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/bits.h>
Go to the source code of this file.
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enum | osmo_amr_type {
AMR_4_75 = 0
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AMR_5_15 = 1
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AMR_5_90 = 2
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AMR_6_70 = 3
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AMR_7_40 = 4
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AMR_7_95 = 5
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AMR_10_2 = 6
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AMR_12_2 = 7
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AMR_SID = 8
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AMR_GSM_EFR_SID = 9
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AMR_TDMA_EFR_SID = 10
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AMR_PDC_EFR_SID = 11
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AMR_NO_DATA = 15
} |
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enum | osmo_amr_quality {
AMR_BAD = 0
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AMR_GOOD = 1
} |
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static const char * | osmo_amr_type_name (enum osmo_amr_type type) |
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int | osmo_amr_s_to_d (ubit_t *out, const ubit_t *in, uint16_t n_bits, enum osmo_amr_type amr_mode) |
| Convert from S-bits (codec output) to d-bits.
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int | osmo_amr_d_to_s (ubit_t *out, const ubit_t *in, uint16_t n_bits, enum osmo_amr_type amr_mode) |
| Convert from d-bits to s-bits (codec input).
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static bool | osmo_amr_is_speech (enum osmo_amr_type ft) |
| Check if given AMR Frame Type is a speech frame.
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bool | osmo_fr_check_sid (const uint8_t *rtp_payload, size_t payload_len) |
| Check whether RTP frame contains FR SID code word according to TS 101 318 §5.1.2.
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bool | osmo_hr_check_sid (const uint8_t *rtp_payload, size_t payload_len) |
| Check whether RTP frame contains HR SID code word according to TS 101 318 §5.2.2.
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int | osmo_amr_rtp_enc (uint8_t *payload, uint8_t cmr, enum osmo_amr_type ft, enum osmo_amr_quality bfi) |
| Encode various AMR parameters from RTP payload (RFC 4867)
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int | osmo_amr_rtp_dec (const uint8_t *payload, int payload_len, uint8_t *cmr, int8_t *cmi, enum osmo_amr_type *ft, enum osmo_amr_quality *bfi, int8_t *sti) |
| Decode various AMR parameters from RTP payload (RFC 4867) acording to 3GPP TS 26.101.
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◆ GSM_EFR_BYTES
◆ GSM_FR_BYTES
◆ GSM_HR_BYTES
◆ osmo_amr_quality
Enumerator |
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AMR_BAD | |
AMR_GOOD | |
◆ osmo_amr_type
Enumerator |
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AMR_4_75 | |
AMR_5_15 | |
AMR_5_90 | |
AMR_6_70 | |
AMR_7_40 | |
AMR_7_95 | |
AMR_10_2 | |
AMR_12_2 | |
AMR_SID | |
AMR_GSM_EFR_SID | |
AMR_TDMA_EFR_SID | |
AMR_PDC_EFR_SID | |
AMR_NO_DATA | |
◆ osmo_amr_d_to_s()
◆ osmo_amr_is_speech()
◆ osmo_amr_rtp_dec()
int osmo_amr_rtp_dec |
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const uint8_t * |
rtppayload, |
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int |
payload_len, |
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uint8_t * |
cmr, |
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int8_t * |
cmi, |
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enum osmo_amr_type * |
ft, |
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enum osmo_amr_quality * |
bfi, |
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int8_t * |
sti |
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) |
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Decode various AMR parameters from RTP payload (RFC 4867) acording to 3GPP TS 26.101.
- Parameters
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[in] | rtppayload | Payload from RTP packet |
[in] | payload_len | length of rtppayload |
[out] | cmr | AMR Codec Mode Request, not filled if NULL |
[out] | cmi | AMR Codec Mode Indicator, -1 if not applicable for this type, not filled if NULL |
[out] | ft | AMR Frame Type, not filled if NULL |
[out] | bfi | AMR Bad Frame Indicator, not filled if NULL |
[out] | sti | AMR SID Type Indicator, -1 if not applicable for this type, not filled if NULL |
- Returns
- length of AMR data or negative value on error
References amr_len_by_ft, AMR_SID, ENOTSUP, and type.
◆ osmo_amr_rtp_enc()
Encode various AMR parameters from RTP payload (RFC 4867)
- Parameters
-
[out] | payload | Payload for RTP packet, contains speech data (if any) except for have 2 first bytes where header will be built |
[in] | cmr | AMR codec Mode Request |
[in] | ft | AMR Frame Type |
[in] | bfi | AMR Bad Frame Indicator |
- Returns
- length of AMR data (header + ToC + speech data) or negative value on error
Note: only octet-aligned mode is supported so the header occupies 2 full bytes. Optional interleaving header is not supported.
References amr_len_by_ft, and ENOTSUP.
◆ osmo_amr_s_to_d()
◆ osmo_amr_type_name()
static const char * osmo_amr_type_name |
( |
enum osmo_amr_type |
type | ) |
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inlinestatic |
◆ osmo_fr_check_sid()
bool osmo_fr_check_sid |
( |
const uint8_t * |
rtp_payload, |
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size_t |
payload_len |
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) |
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◆ osmo_hr_check_sid()
bool osmo_hr_check_sid |
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const uint8_t * |
rtp_payload, |
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size_t |
payload_len |
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) |
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◆ gsm610_bitorder
const uint16_t gsm610_bitorder[] |
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extern |
◆ gsm620_unvoiced_bitorder
const uint16_t gsm620_unvoiced_bitorder[] |
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extern |
◆ gsm620_voiced_bitorder
const uint16_t gsm620_voiced_bitorder[] |
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◆ gsm660_bitorder
const uint16_t gsm660_bitorder[] |
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extern |
◆ gsm690_10_2_bitorder
const uint16_t gsm690_10_2_bitorder[] |
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extern |
◆ gsm690_12_2_bitorder
const uint16_t gsm690_12_2_bitorder[] |
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◆ gsm690_4_75_bitorder
const uint16_t gsm690_4_75_bitorder[] |
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extern |
◆ gsm690_5_15_bitorder
const uint16_t gsm690_5_15_bitorder[] |
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extern |
◆ gsm690_5_9_bitorder
const uint16_t gsm690_5_9_bitorder[] |
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◆ gsm690_6_7_bitorder
const uint16_t gsm690_6_7_bitorder[] |
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◆ gsm690_7_4_bitorder
const uint16_t gsm690_7_4_bitorder[] |
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◆ gsm690_7_95_bitorder
const uint16_t gsm690_7_95_bitorder[] |
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extern |
◆ gsm690_bitlength
These constants refer to the length of one "AMR core frame" as per TS 26.101 Section 4.2.2 / Table 2.
◆ osmo_amr_type_names