libosmocore[master]: gsm0808: add function gsm0808_extrapolate_speech_codec()

[Harald Welte]

Patch Set 8:

(1 comment)

https://gerrit.osmocom.org/#/c/2831/8/src/gsm/gsm0808_utils.c
File src/gsm/gsm0808_utils.c:

Line 691: int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
name: what about gsm0808_speech_codec_from_chan_type() ? I think current name 
leaves it unclear from where/what it is extrapolated?


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Gerrit-Change-Id: I257c972e9fdf0dfe940a8d483447085bd62e50a2
Gerrit-PatchSet: 8
Gerrit-Project: libosmocore
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Gerrit-Owner: dexter 
Gerrit-Reviewer: Harald Welte 
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Gerrit-Reviewer: Neels Hofmeyr 
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[PATCH] libosmocore[master]: gsm0808: add function gsm0808_extrapolate_speech_codec()

[dexter]

Hello Neels Hofmeyr, Jenkins Builder,

I'd like you to reexamine a change.  Please visit

https://gerrit.osmocom.org/2831

to look at the new patch set (#8).

gsm0808: add function gsm0808_extrapolate_speech_codec()

The contents of the speech codec element (struct gsm0808_speech_codec),
that is also used in the speech codec list element (struct
gsm0808_speech_codec_list) can be extrapolated directly from the
permitted speech parameter in the channel type field (struct
gsm0808_channel_type) when full AoIP with compressed speech via
RTP/UDP/IP is assumed and when the codec configuration on the air
interface exactly matches the codec configuration on the IP backhaul.

This patch adds a function that can be used as a helper to fill
out spech codec fields by only giving a permitted speech parameter
as input.

Change-Id: I257c972e9fdf0dfe940a8d483447085bd62e50a2
---
M include/osmocom/gsm/gsm0808_utils.h
M src/gsm/gsm0808_utils.c
M src/gsm/libosmogsm.map
3 files changed, 57 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/31/2831/8

diff --git a/include/osmocom/gsm/gsm0808_utils.h 
b/include/osmocom/gsm/gsm0808_utils.h
index 9057273..0c69e31 100644
--- a/include/osmocom/gsm/gsm0808_utils.h
+++ b/include/osmocom/gsm/gsm0808_utils.h
@@ -73,3 +73,5 @@
 const uint8_t *elem, uint8_t len);
 
 int gsm0808_convert_to_speech_codec_type(uint8_t perm_spch);
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch);
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index f7062a5..efa29a1 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -682,4 +682,58 @@
return -EINVAL;
 }
 
+/*! \brief Extrapolate a speech codec field from a given permitted speech
+ *  parameter (channel type).
+ *  \param[out] sc Caller provided memory to store the resulting speech codec
+ *  \param[in] perm_spch value that is used to derive the speech codec info
+ *  (see also: enum gsm0808_speech_codec_type in gsm0808_utils.h)
+ *  \returns zero when successful; negative on error */
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch)
+{
+   int rc;
+
+   memset(sc, 0, sizeof(*sc));
+
+   /* Determine codec type */
+   rc = gsm0808_convert_to_speech_codec_type(perm_spch);
+   if (rc < 0)
+   return -EINVAL;
+   sc->type = (uint8_t) rc;
+
+   /* Depending on the speech codec type, pick a default codec
+* configuration that exactly matches the configuration on the
+* air interface. */
+   switch (sc->type) {
+   case GSM0808_SCT_FR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR;
+   break;
+   case GSM0808_SCT_FR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OFR_AMR_WB;
+   break;
+   case GSM0808_SCT_FR5:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_HR_AMR;
+   break;
+   case GSM0808_SCT_HR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR6:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR;
+   break;
+   default:
+   /* Note: Not all codec types specify a default setting,
+* in this case, we just set the field to zero. */
+   sc->cfg = 0;
+   }
+
+   /* Tag all codecs as "Full IP"
+* (see als 3GPP TS 48.008 3.2.2.103) */
+   sc->fi = true;
+
+   return 0;
+}
+
 /*! @} */
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index ccc5b9a..36cba39 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -163,6 +163,7 @@
 gsm0808_enc_cell_id_list;
 gsm0808_dec_cell_id_list;
 gsm0808_convert_to_speech_codec_type;
+gsm0808_extrapolate_speech_codec;
 
 gsm0858_rsl_ul_meas_enc;
 

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libosmocore[master]: gsm0808: add function gsm0808_extrapolate_speech_codec()

[Neels Hofmeyr]

Patch Set 7: Code-Review-1

(3 comments)

https://gerrit.osmocom.org/#/c/2831/7/src/gsm/gsm0808_utils.c
File src/gsm/gsm0808_utils.c:

Line 688:  *  \param[in] perm_spch value from where the speech codec is derived 
from
'from where derived from' is incorrect.
"perm_spch value the speech codec is derived from"
(optionally include "that" or "which" after "value")


Line 704:   /* Depending on the speech codec type, pick a default codc
(codec)


Line 725:   break;
why did you drop the 'default: return -EINVAL'? There should be a default case. 
(loosely related, callers should check for -EINVAL rc)


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Gerrit-Change-Id: I257c972e9fdf0dfe940a8d483447085bd62e50a2
Gerrit-PatchSet: 7
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Gerrit-Reviewer: Neels Hofmeyr 
Gerrit-HasComments: Yes

[PATCH] libosmocore[master]: gsm0808: add function gsm0808_extrapolate_speech_codec()

[dexter]

Hello Neels Hofmeyr, Jenkins Builder,

I'd like you to reexamine a change.  Please visit

https://gerrit.osmocom.org/2831

to look at the new patch set (#7).

gsm0808: add function gsm0808_extrapolate_speech_codec()

The contents of the speech codec element (struct gsm0808_speech_codec),
that is also used in the speech codec list element (struct
gsm0808_speech_codec_list) can be extrapolated directly from the
permitted speech parameter in the channel type field (struct
gsm0808_channel_type) when full AoIP with compressed speech via
RTP/UDP/IP is assumed and when the codec configuration on the air
interface exactly matches the codec configuration on the IP backhaul.

This patch adds a function that can be used as a helper to fill
out spech codec fields by only giving a permitted speech parameter
as input.

Change-Id: I257c972e9fdf0dfe940a8d483447085bd62e50a2
---
M include/osmocom/gsm/gsm0808_utils.h
M src/gsm/gsm0808_utils.c
M src/gsm/libosmogsm.map
3 files changed, 53 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/31/2831/7

diff --git a/include/osmocom/gsm/gsm0808_utils.h 
b/include/osmocom/gsm/gsm0808_utils.h
index 9057273..0c69e31 100644
--- a/include/osmocom/gsm/gsm0808_utils.h
+++ b/include/osmocom/gsm/gsm0808_utils.h
@@ -73,3 +73,5 @@
 const uint8_t *elem, uint8_t len);
 
 int gsm0808_convert_to_speech_codec_type(uint8_t perm_spch);
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch);
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index 2d4b15c..d27ca5b 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -682,4 +682,54 @@
return -EINVAL;
 }
 
+/*! \brief Extrapolate a speech codec field from a given permitted speech
+ *  parameter (channel type).
+ *  \param[out] sc Caller provided memory to store the resulting speech codec
+ *  \param[in] perm_spch value from where the speech codec is derived from
+ *  (see also: enum gsm0808_speech_codec_type in gsm0808_utils.h)
+ *  \returns zero when successful; negative on error */
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch)
+{
+   int rc;
+
+   memset(sc, 0, sizeof(*sc));
+
+   /* Determine codec type */
+   rc = gsm0808_convert_to_speech_codec_type(perm_spch);
+   if (rc < 0)
+   return -EINVAL;
+   sc->type = (uint8_t) rc;
+
+   /* Depending on the speech codec type, pick a default codc
+* configuration that exactly matches the configuration on the
+* air interface. */
+   switch (sc->type) {
+   case GSM0808_SCT_FR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR;
+   break;
+   case GSM0808_SCT_FR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OFR_AMR_WB;
+   break;
+   case GSM0808_SCT_FR5:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_HR_AMR;
+   break;
+   case GSM0808_SCT_HR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR6:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR;
+   break;
+   }
+
+   /* Tag all codecs as "Full IP"
+* (see als 3GPP TS 48.008 3.2.2.103) */
+   sc->fi = true;
+
+   return 0;
+}
+
 /*! @} */
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index ccc5b9a..36cba39 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -163,6 +163,7 @@
 gsm0808_enc_cell_id_list;
 gsm0808_dec_cell_id_list;
 gsm0808_convert_to_speech_codec_type;
+gsm0808_extrapolate_speech_codec;
 
 gsm0858_rsl_ul_meas_enc;
 

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Gerrit-Owner: dexter 
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Neels Hofmeyr 

[PATCH] libosmocore[master]: gsm0808: add function gsm0808_extrapolate_speech_codec()

[dexter]

Hello Neels Hofmeyr, Jenkins Builder,

I'd like you to reexamine a change.  Please visit

https://gerrit.osmocom.org/2831

to look at the new patch set (#6).

gsm0808: add function gsm0808_extrapolate_speech_codec()

The contents of the speech codec element (struct gsm0808_speech_codec),
that is also used in the speech codec list element (struct
gsm0808_speech_codec_list) can be extrapolated directly from the
permitted speech parameter in the channel type field (struct
gsm0808_channel_type) when full AoIP with compressed speech via
RTP/UDP/IP is assumed and when the codec configuration on the air
interface exactly matches the codec configuration on the IP backhaul.

This patch adds a function that can be used as a helper to fill
out spech codec fields by only giving a permitted speech parameter
as input.

Change-Id: I257c972e9fdf0dfe940a8d483447085bd62e50a2
---
M include/osmocom/gsm/gsm0808_utils.h
M src/gsm/gsm0808_utils.c
M src/gsm/libosmogsm.map
3 files changed, 55 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/31/2831/6

diff --git a/include/osmocom/gsm/gsm0808_utils.h 
b/include/osmocom/gsm/gsm0808_utils.h
index 9057273..0c69e31 100644
--- a/include/osmocom/gsm/gsm0808_utils.h
+++ b/include/osmocom/gsm/gsm0808_utils.h
@@ -73,3 +73,5 @@
 const uint8_t *elem, uint8_t len);
 
 int gsm0808_convert_to_speech_codec_type(uint8_t perm_spch);
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch);
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index 2d4b15c..eeb9b42 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -682,4 +682,56 @@
return -EINVAL;
 }
 
+/*! \brief Extrapolate a speech codec field from a given permitted speech
+ *  parameter (channel type).
+ *  \param[out] sc Caller provided memory to store the resulting speech codec
+ *  \param[in] perm_spch value from where the speech codec is derived from
+ *  (see also: enum gsm0808_speech_codec_type in gsm0808_utils.h)
+ *  \returns zero when successful; negative on error */
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch)
+{
+   int rc;
+
+   memset(sc, 0, sizeof(*sc));
+
+   /* Determine codec type */
+   rc = gsm0808_convert_to_speech_codec_type(perm_spch);
+   if (rc < 0)
+   return -EINVAL;
+   sc->type = (uint8_t) rc;
+
+   /* Depending on the speech codec type, pick a default codc
+* configuration that exactly matches the configuration on the
+* air interface. */
+   switch (sc->type) {
+   case GSM0808_SCT_FR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR;
+   break;
+   case GSM0808_SCT_FR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OFR_AMR_WB;
+   break;
+   case GSM0808_SCT_FR5:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_HR_AMR;
+   break;
+   case GSM0808_SCT_HR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR6:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR;
+   break;
+   default:
+   return -EINVAL;
+   }
+
+   /* Tag all codecs as "Full IP"
+* (see als 3GPP TS 48.008 3.2.2.103) */
+   sc->fi = true;
+
+   return 0;
+}
+
 /*! @} */
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index ccc5b9a..36cba39 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -163,6 +163,7 @@
 gsm0808_enc_cell_id_list;
 gsm0808_dec_cell_id_list;
 gsm0808_convert_to_speech_codec_type;
+gsm0808_extrapolate_speech_codec;
 
 gsm0858_rsl_ul_meas_enc;
 

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Gerrit-Owner: dexter 
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Gerrit-Reviewer: Neels Hofmeyr 

libosmocore[master]: gsm0808: add function gsm0808_extrapolate_speech_codec()

[Neels Hofmeyr]

Patch Set 4: Code-Review-1

(4 comments)

https://gerrit.osmocom.org/#/c/2831/4/src/gsm/gsm0808_utils.c
File src/gsm/gsm0808_utils.c:

Line 688:  *  speech parameter 
(whitespace error)


Line 690:  *  \param[in] perm_spch value from where the speech codec is derived 
from
"value which the speech codec is derived from" and please also explicitly say 
which kind of value; the comment as it is leaves the reader guessing which 
constants or values might match this uint8_t.


Line 691:  *  \returns zero when successfull; negative on error */
"successful"


Line 695:   /*! Note: This function accepts the permitted speech 
configuration
doxygen comment in the C block? Rather include this entire paragraph in above 
API doc for the function, e.g. separated by "blank" line below the param 
description (or between brief and params if you prefer that). Also best to 
stick to the imperative form, dropping things like "this function does".

  /*! \brief summary bla.
   *  \param ...
   *
   * Accept the permitted speech configuration from the channel type
   * information and compute an ...
   */


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[PATCH] libosmocore[master]: gsm0808: add function gsm0808_extrapolate_speech_codec()

[dexter]

Hello Neels Hofmeyr, Jenkins Builder,

I'd like you to reexamine a change.  Please visit

https://gerrit.osmocom.org/2831

to look at the new patch set (#4).

gsm0808: add function gsm0808_extrapolate_speech_codec()

The contents of the speech codec element (struct gsm0808_speech_codec),
that is also used in the speech codec list element (struct
gsm0808_speech_codec_list) can be extrapolated directly from the
permitted speech parameter in the channel type field (struct
gsm0808_channel_type) when full AoIP with compressed speech via
RTP/UDP/IP is assumed and when the codec configuration on the air
interface exactly matches the codec configuration on the IP backhaul.

This patch adds a function that can be used as a helper to fill
out spech codec fields by only giving a permitted speech parameter
as input.

Change-Id: I257c972e9fdf0dfe940a8d483447085bd62e50a2
---
M include/osmocom/gsm/gsm0808_utils.h
M src/gsm/gsm0808_utils.c
M src/gsm/libosmogsm.map
3 files changed, 63 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/31/2831/4

diff --git a/include/osmocom/gsm/gsm0808_utils.h 
b/include/osmocom/gsm/gsm0808_utils.h
index 59f64ca..2a53508 100644
--- a/include/osmocom/gsm/gsm0808_utils.h
+++ b/include/osmocom/gsm/gsm0808_utils.h
@@ -76,3 +76,7 @@
  * that is used in struct gsm0808_channel_type to the speech codec
  * representation we use in struct gsm0808_speech_codec */
 int gsm0808_convert_to_speech_codec_type(uint8_t perm_spch);
+
+/* Extrapolate a speech codec field from a given permitted speech parameter */
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch);
diff --git a/src/gsm/gsm0808_utils.c b/src/gsm/gsm0808_utils.c
index 5ff280a..8282f02 100644
--- a/src/gsm/gsm0808_utils.c
+++ b/src/gsm/gsm0808_utils.c
@@ -684,4 +684,62 @@
return -EINVAL;
 }
 
+/*! \brief Extrapolate a speech codec field from a given permitted
+ *  speech parameter 
+ *  \param[out] sc Caller provided memory to store the resulting speech codec
+ *  \param[in] perm_spch value from where the speech codec is derived from
+ *  \returns zero when successfull; negative on error */
+int gsm0808_extrapolate_speech_codec(struct gsm0808_speech_codec *sc,
+uint8_t perm_spch)
+{
+   /*! Note: This function accepts the permitted speech configuration
+*  from the channel type information and computes an AoIP speech
+*  codec that field that consistently matches the channel type
+*  configuration. This reflects a a non-transcoding-situation.
+*  (In transcoding scenarios, the codec used in the RTP stream
+*  may be differ from the codec used on the air interface) */
+
+   int rc;
+
+   memset(sc, 0, sizeof(*sc));
+
+   /* Determine codec type */
+   rc = gsm0808_convert_to_speech_codec_type(perm_spch);
+   if (rc < 0)
+   return -EINVAL;
+   sc->type = (uint8_t) rc;
+
+   /* Depending on the speech codec type, pick a default codc
+* configuration that exactly matches the configuration on the
+* air interface. */
+   switch (sc->type) {
+   case GSM0808_SCT_FR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR;
+   break;
+   case GSM0808_SCT_FR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OFR_AMR_WB;
+   break;
+   case GSM0808_SCT_FR5:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_FR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR3:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_HR_AMR;
+   break;
+   case GSM0808_SCT_HR4:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR_WB;
+   break;
+   case GSM0808_SCT_HR6:
+   sc->cfg = GSM0808_SC_CFG_DEFAULT_OHR_AMR;
+   break;
+   default:
+   return -EINVAL;
+   }
+
+   /* Tag all codecs as "Full IP"
+* (see als 3GPP TS 48.008 3.2.2.103) */
+   sc->fi = true;
+
+   return 0;
+}
+
 /*! @} */
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index ccc5b9a..36cba39 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -163,6 +163,7 @@
 gsm0808_enc_cell_id_list;
 gsm0808_dec_cell_id_list;
 gsm0808_convert_to_speech_codec_type;
+gsm0808_extrapolate_speech_codec;
 
 gsm0858_rsl_ul_meas_enc;
 

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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I257c972e9fdf0dfe940a8d483447085bd62e50a2
Gerrit-PatchSet: 4
Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Owner: dexter 
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Neels Hofmeyr