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fdkaacenc: Add support for enabling afterburner

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This is an additional quality parameter. In the default configuration this
quality switch is deactivated because it would cause a workload increase
which might be significant. If workload is not an issue in the application
it can be recommended to activate this feature.
This commit is contained in:
Sanchayan Maity 2021-01-23 18:35:12 +05:30
parent a63d8ee720
commit 734593ccab
3 changed files with 44 additions and 1 deletions
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12
subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json
View file

@ -16714,6 +16714,18 @@
}
},
"properties": {
"afterburner": {
"blurb": "Additional quality control parameter. Can cause workload increase.",
"conditionally-available": false,
"construct": false,
"construct-only": false,
"controllable": false,
"default": "false",
"mutable": "null",
"readable": true,
"type": "gboolean",
"writable": true
},
"bitrate": {
"blurb": "Target Audio Bitrate (0 = fixed value based on sample rate and channel count)",
"conditionally-available": false,

31
subprojects/gst-plugins-bad/ext/fdkaac/gstfdkaacenc.c
View file

@ -30,7 +30,7 @@
/* TODO:
* - Add support for other AOT / profiles
* - Expose more properties, e.g. afterburner and vbr
* - Expose more properties, e.g. vbr
* - Signal encoder delay
* - LOAS / LATM support
*/
@ -38,6 +38,7 @@
enum
{
PROP_0,
PROP_AFTERBURNER,
PROP_BITRATE
};
@ -109,6 +110,9 @@ gst_fdkaacenc_set_property (GObject * object, guint prop_id,
case PROP_BITRATE:
self->bitrate = g_value_get_int (value);
break;
case PROP_AFTERBURNER:
self->afterburner = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -126,6 +130,9 @@ gst_fdkaacenc_get_property (GObject * object, guint prop_id,
case PROP_BITRATE:
g_value_set_int (value, self->bitrate);
break;
case PROP_AFTERBURNER:
g_value_set_boolean (value, self->afterburner);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -427,6 +434,16 @@ gst_fdkaacenc_set_format (GstAudioEncoder * enc, GstAudioInfo * info)
return FALSE;
}
if (self->afterburner) {
if ((err =
aacEncoder_SetParam (self->enc, AACENC_AFTERBURNER,
1)) != AACENC_OK) {
GST_ERROR_OBJECT (self, "Could not enable afterburner: %d", err);
return FALSE;
}
GST_INFO_OBJECT (self, "Afterburner enabled");
}
if ((err = aacEncEncode (self->enc, NULL, NULL, NULL, NULL)) != AACENC_OK) {
GST_ERROR_OBJECT (self, "Unable to initialize encoder: %d", err);
return FALSE;
@ -613,6 +630,7 @@ gst_fdkaacenc_init (GstFdkAacEnc * self)
self->bitrate = DEFAULT_BITRATE;
self->enc = NULL;
self->is_drained = TRUE;
self->afterburner = FALSE;
gst_audio_encoder_set_drainable (GST_AUDIO_ENCODER (self), TRUE);
}
@ -642,6 +660,17 @@ gst_fdkaacenc_class_init (GstFdkAacEncClass * klass)
0, G_MAXINT, DEFAULT_BITRATE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstFdkAacEnc:afterburner:
*
* Afterburner - Quality Parameter.
*
* Since: 1.22
*/
g_object_class_install_property (object_class, PROP_AFTERBURNER,
g_param_spec_boolean ("afterburner", "Afterburner - Quality Parameter",
"Additional quality control parameter. Can cause workload increase.",
FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_static_pad_template (element_class, &sink_template);
gst_element_class_add_static_pad_template (element_class, &src_template);

2
subprojects/gst-plugins-bad/ext/fdkaac/gstfdkaacenc.h
View file

@ -51,6 +51,8 @@ struct _GstFdkAacEnc {
gboolean need_reorder;
const GstAudioChannelPosition *aac_positions;
gboolean is_drained;
gboolean afterburner;
};
struct _GstFdkAacEncClass {