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gstengine: Add a caps filter in pipeline before tee

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This commit is contained in:
Jim Broadus 2021-01-05 14:37:11 -08:00 committed by John Maguire
parent 2b17170bf8
commit 06066dfba4
2 changed files with 17 additions and 9 deletions
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25
src/engines/gstenginepipeline.cpp
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@ -98,6 +98,7 @@ GstEnginePipeline::GstEnginePipeline(GstEngine* engine)
volume_(nullptr),
audioscale_(nullptr),
audiosink_(nullptr),
capsfilter_(nullptr),
tee_(nullptr),
tee_probe_pad_(nullptr),
tee_audio_pad_(nullptr) {
@ -252,8 +253,8 @@ bool GstEnginePipeline::InitAudioBin() {
// right type of source and decoder for the URI.
// The audio bin gets created here and contains:
// queue ! audioconvert ! <caps32>
// ! ( rgvolume ! rglimiter ! audioconvert2 ) ! tee
// queue ! audioconvert
// ! ( rgvolume ! rglimiter ! audioconvert2 ) ! capsfilter ! tee
// rgvolume and rglimiter are only created when replaygain is enabled.
// After the tee the pipeline splits. One split is converted to 16-bit int
@ -321,27 +322,29 @@ bool GstEnginePipeline::InitAudioBin() {
volume_ = engine_->CreateElement("volume", audiobin_);
audioscale_ = engine_->CreateElement("audioresample", audiobin_);
convert = engine_->CreateElement("audioconvert", audiobin_);
capsfilter_ = engine_->CreateElement("capsfilter", audiobin_);
if (!queue_ || !audioconvert_ || !tee_ || !probe_queue || !probe_converter ||
!probe_sink || !audio_queue || !equalizer_preamp_ || !equalizer_ ||
!stereo_panorama_ || !volume_ || !audioscale_ || !convert) {
!stereo_panorama_ || !volume_ || !audioscale_ || !convert ||
!capsfilter_) {
qLog(Error) << "Failed to create elements";
return false;
}
// Create the replaygain elements if it's enabled. event_probe is the
// audioconvert element we attach the probe to, which will change depending
// on whether replaygain is enabled. convert_sink is the element after the
// first audioconvert, which again will change.
// on whether replaygain is enabled. tee_src is the element that links to
// the tee.
GstElement* event_probe = audioconvert_;
GstElement* convert_sink = tee_;
GstElement* tee_src = audioconvert_;
if (rg_enabled_) {
rgvolume_ = engine_->CreateElement("rgvolume", audiobin_);
rglimiter_ = engine_->CreateElement("rglimiter", audiobin_);
audioconvert2_ = engine_->CreateElement("audioconvert", audiobin_);
event_probe = audioconvert2_;
convert_sink = rgvolume_;
tee_src = audioconvert2_;
if (!rgvolume_ || !rglimiter_ || !audioconvert2_) {
qLog(Error) << "Failed to create rg elements";
@ -434,7 +437,7 @@ bool GstEnginePipeline::InitAudioBin() {
g_object_set(G_OBJECT(probe_queue), "max-size-bytes", 0, nullptr);
g_object_set(G_OBJECT(probe_queue), "max-size-time", 0, nullptr);
gst_element_link_many(queue_, audioconvert_, convert_sink, nullptr);
gst_element_link(queue_, audioconvert_);
GstCaps* caps16 = gst_caps_new_simple("audio/x-raw", "format", G_TYPE_STRING,
"S16LE", NULL);
@ -454,9 +457,13 @@ bool GstEnginePipeline::InitAudioBin() {
// Link replaygain elements if enabled.
if (rg_enabled_) {
gst_element_link_many(rgvolume_, rglimiter_, audioconvert2_, tee_, nullptr);
gst_element_link_many(audioconvert_, rgvolume_, rglimiter_, audioconvert2_,
nullptr);
}
// Link the trunk to the tee via filter.
gst_element_link_many(tee_src, capsfilter_, tee_, nullptr);
// Link the analyzer output of the tee
gst_element_link(probe_queue, probe_converter);

1
src/engines/gstenginepipeline.h
View File

@ -297,6 +297,7 @@ class GstEnginePipeline : public QObject {
GstElement* volume_;
GstElement* audioscale_;
GstElement* audiosink_;
GstElement* capsfilter_;
// tee and request pads.
GstElement* tee_;