[gstreamer-bugs] [Bug 627263] New: add property for pulsesrc to "use native format without any conversions"

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=627263
  GStreamer | gst-plugins-good | unspecified

           Summary: add property for pulsesrc to "use native format
                    without any conversions"
    Classification: Desktop
           Product: GStreamer
           Version: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: bug-track at fisher-privat.net
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Pleas add option to pulsesrc to use same format in source.
For example:
i have webcam which provide "s16le 1ch 16000Hz" pulsesrc
will take "float32le 1ch 44100Hz". In this case pulse will convert it.
At end point we have bigger file with 44100Hz even if we used source
with 16000Hz and more CPU load.

Solution is to use flags when creating the stream: PA_STREAM_FIX_FORMAT,
PA_STREAM_FIX_RATE and PA_STREAM_FIX_CHANNELS.

here is patch what i used to hard code this flags, it work fine for me:
--- gst-plugins-good0.10-0.10.24.3.orig/ext/pulse/pulsesrc.c
+++ gst-plugins-good0.10-0.10.24.3/ext/pulse/pulsesrc.c
@@ -963,6 +963,8 @@ gst_pulsesrc_prepare (GstAudioSrc * asrc
 #ifdef HAVE_PULSE_0_9_11
           PA_STREAM_ADJUST_LATENCY |
 #endif
+          PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
+          PA_STREAM_FIX_CHANNELS |
           PA_STREAM_START_CORKED) < 0) {
     GST_ELEMENT_ERROR (pulsesrc, RESOURCE, FAILED,
         ("Failed to connect stream: %s",

Take a loot to this discussion:
http://comments.gmane.org/gmane.comp.video.gstreamer.devel/30839?set_blog_all=yes

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