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audio-converter: add API to determine passthrough mode

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audioconvert's passthrough status can no longer be determined
strictly from input / output caps equality, as a mix-matrix can
now be specified.

We now call gst_base_transform_set_passthrough dynamically, based
on the return from the new gst_audio_converter_is_passthrough()
API, which takes the mix matrix into account.
This commit is contained in:
Mathieu Duponchelle 2018-12-17 13:33:56 +01:00 committed by Mathieu Duponchelle
parent 98386927ee
commit 1edb2c4242
4 changed files with 27 additions and 0 deletions
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1
docs/libs/gst-plugins-base-libs-sections.txt
View file

@ -708,6 +708,7 @@ gst_audio_converter_update_config
gst_audio_converter_get_config
gst_audio_converter_reset
gst_audio_converter_supports_inplace
gst_audio_converter_is_passthrough
<SUBSECTION Standard>
gst_audio_converter_flags_get_type
GST_TYPE_AUDIO_CONVERTER_FLAGS

20
gst-libs/gst/audio/audio-converter.c
View file

@ -111,6 +111,8 @@ struct _GstAudioConverter
gboolean in_place; /* the conversion can be done in place; returned by gst_audio_converter_supports_inplace() */
gboolean passthrough;
/* unpack */
gboolean in_default;
gboolean unpack_ip;
@ -1373,6 +1375,7 @@ gst_audio_converter_new (GstAudioConverterFlags flags, GstAudioInfo * in_info,
convert->convert = converter_generic;
convert->in_place = FALSE;
convert->passthrough = FALSE;
/* optimize */
if (convert->mix_passthrough) {
@ -1383,6 +1386,7 @@ gst_audio_converter_new (GstAudioConverterFlags flags, GstAudioInfo * in_info,
"passthrough mixing -> passthrough");
convert->convert = converter_passthrough;
convert->in_place = TRUE;
convert->passthrough = TRUE;
}
} else {
if (is_intermediate_format (in_info->finfo->format)) {
@ -1645,3 +1649,19 @@ gst_audio_converter_supports_inplace (GstAudioConverter * convert)
{
return convert->in_place;
}
/**
* gst_audio_converter_is_passthrough:
*
* Returns whether the audio converter will operate in passthrough mode.
* The return value would be typically input to gst_base_transform_set_passthrough()
*
* Returns: %TRUE when no conversion will actually occur.
*
* Since: 1.16
*/
gboolean
gst_audio_converter_is_passthrough (GstAudioConverter * convert)
{
return convert->passthrough;
}

3
gst-libs/gst/audio/audio-converter.h
View file

@ -159,6 +159,9 @@ gboolean gst_audio_converter_samples (GstAudioConverter * co
GST_AUDIO_API
gboolean gst_audio_converter_supports_inplace (GstAudioConverter *convert);
GST_AUDIO_API
gboolean gst_audio_converter_is_passthrough (GstAudioConverter *convert);
GST_AUDIO_API
gboolean gst_audio_converter_convert (GstAudioConverter * convert,
GstAudioConverterFlags flags,

3
gst/audioconvert/gstaudioconvert.c
View file

@ -775,6 +775,9 @@ gst_audio_convert_set_caps (GstBaseTransform * base, GstCaps * incaps,
in_place = gst_audio_converter_supports_inplace (this->convert);
gst_base_transform_set_in_place (base, in_place);
gst_base_transform_set_passthrough (base,
gst_audio_converter_is_passthrough (this->convert));
this->in_info = in_info;
this->out_info = out_info;