Bug 160894 – [audioscale] support resampling >2 channel audio or floating-point

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Bug 160894 - [audioscale] support resampling >2 channel audio or floating-point


Summary:	[audioscale] support resampling >2 channel audio or floating-point


Status:	RESOLVED OBSOLETE

Product:	GStreamer
Classification:	Platform
Component:	gst-plugins-base
Version:	git master
Hardware:	Other Linux

Importance:	Normal enhancement
Target Milestone:	NONE
Assigned To:	GStreamer Maintainers
QA Contact:	GStreamer Maintainers

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2004-12-09 20:46 UTC by Tim-Philipp Müller
Modified:	2006-07-24 16:15 UTC

See Also:
GNOME target:	---
GNOME version:	---

Description Tim-Philipp Müller 2004-12-09 20:46:10 UTC

This produces noise when the DVD title has 6-channel sound (works fine with 
2-channel titles): 
 
% gst-launch-0.8 -v dvdreadsrc ! dvddemux ! a52dec !audioconvert ! 
audioscale ! audio/x-raw-int,rate=44100 ! alsasink 
RUNNING pipeline ... 
/pipeline0/dvdreadsrc0.src: caps = video/mpeg, mpegversion=(int)1, 
systemstream=(boolean)true 
/pipeline0/dvddemux0.sink: caps = video/mpeg, mpegversion=(int)1, 
systemstream=(boolean)true 
/pipeline0/dvdreadsrc0.src: active = TRUE 
/pipeline0/dvddemux0.sink: active = TRUE 
/pipeline0/dvddemux0.src: active = TRUE 
/pipeline0/dvddemux0.current_video: active = TRUE 
/pipeline0/dvddemux0.current_audio: active = TRUE 
/pipeline0/dvddemux0.current_subpicture: active = TRUE 
/pipeline0/a52dec0.sink: active = TRUE 
/pipeline0/a52dec0.src: active = TRUE 
/pipeline0/audioconvert0.sink: active = TRUE 
/pipeline0/audioconvert0.src: active = TRUE 
/pipeline0/audioscale0.sink: active = TRUE 
/pipeline0/audioscale0.src: active = TRUE 
/pipeline0/alsasink0.sink: active = TRUE 
/pipeline0/dvddemux0.video_00: active = TRUE 
/pipeline0/dvddemux0.current_audio: caps = audio/x-ac3 
/pipeline0/a52dec0.sink: caps = audio/x-ac3 
/pipeline0/dvddemux0.audio_00: active = TRUE 
/pipeline0/audioscale0.src: caps = audio/x-raw-int, rate=(int)44100, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/alsasink0.sink: caps = audio/x-raw-int, rate=(int)44100, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/audioconvert0.src: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/audioscale0.sink: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/a52dec0.src: caps = audio/x-raw-float, endianness=(int)1234, 
width=(int)32, channels=(int)6, rate=(int)48000, buffer-frames=(int)0, 
channel-positions=(GstAudioChannelPosition)< GST_AUDIO_CHANNEL_POSITION_LFE, 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, 
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, 
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT > 
/pipeline0/audioconvert0.sink: caps = audio/x-raw-float, endianness=(int)1234, 
width=(int)32, channels=(int)6, rate=(int)48000, buffer-frames=(int)0, 
channel-positions=(GstAudioChannelPosition)< GST_AUDIO_CHANNEL_POSITION_LFE, 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, 
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, 
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT > 
/pipeline0/dvddemux0.audio_01: active = TRUE 
/pipeline0/dvddemux0.audio_03: active = TRUE 
/pipeline0/dvddemux0.audio_04: active = TRUE 
Caught interrupt. 
 
 
 
 
This, however, works (note: a52dec outputs @ 48kHz by default): 
 
% gst-launch-0.8 -v dvdreadsrc ! dvddemux ! a52dec !audioconvert ! 
audioscale ! audio/x-raw-int,rate=48000 ! alsasink 
RUNNING pipeline ... 
/pipeline0/dvdreadsrc0.src: caps = video/mpeg, mpegversion=(int)1, 
systemstream=(boolean)true 
/pipeline0/dvddemux0.sink: caps = video/mpeg, mpegversion=(int)1, 
systemstream=(boolean)true 
/pipeline0/dvdreadsrc0.src: active = TRUE 
/pipeline0/dvddemux0.sink: active = TRUE 
/pipeline0/dvddemux0.src: active = TRUE 
/pipeline0/dvddemux0.current_video: active = TRUE 
/pipeline0/dvddemux0.current_audio: active = TRUE 
/pipeline0/dvddemux0.current_subpicture: active = TRUE 
/pipeline0/a52dec0.sink: active = TRUE 
/pipeline0/a52dec0.src: active = TRUE 
/pipeline0/audioconvert0.sink: active = TRUE 
/pipeline0/audioconvert0.src: active = TRUE 
/pipeline0/audioscale0.sink: active = TRUE 
/pipeline0/audioscale0.src: active = TRUE 
/pipeline0/alsasink0.sink: active = TRUE 
/pipeline0/dvddemux0.video_00: active = TRUE 
/pipeline0/dvddemux0.current_audio: caps = audio/x-ac3 
/pipeline0/a52dec0.sink: caps = audio/x-ac3 
/pipeline0/dvddemux0.audio_00: active = TRUE 
/pipeline0/audioscale0.src: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/alsasink0.sink: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/audioconvert0.src: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/audioscale0.sink: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/a52dec0.src: caps = audio/x-raw-float, endianness=(int)1234, 
width=(int)32, channels=(int)6, rate=(int)48000, buffer-frames=(int)0, 
channel-positions=(GstAudioChannelPosition)< GST_AUDIO_CHANNEL_POSITION_LFE, 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, 
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, 
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT > 
/pipeline0/audioconvert0.sink: caps = audio/x-raw-float, endianness=(int)1234, 
width=(int)32, channels=(int)6, rate=(int)48000, buffer-frames=(int)0, 
channel-positions=(GstAudioChannelPosition)< GST_AUDIO_CHANNEL_POSITION_LFE, 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, 
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, 
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT > 
/pipeline0/dvddemux0.audio_01: active = TRUE 
/pipeline0/dvddemux0.audio_03: active = TRUE 
/pipeline0/dvddemux0.audio_04: active = TRUE 
/pipeline0/dvddemux0.subpicture_02: active = TRUE 
Caught interrupt. 
 
 
 
Strangely, however, this works though (despite same caps on audioscale pads as 
above): 
% gst-launch-0.8 -v dvdreadsrc ! dvddemux ! a52dec !audioconvert ! 
audioscale ! alsasink 
RUNNING pipeline ... 
/pipeline0/dvdreadsrc0.src: caps = video/mpeg, mpegversion=(int)1, 
systemstream=(boolean)true 
/pipeline0/dvddemux0.sink: caps = video/mpeg, mpegversion=(int)1, 
systemstream=(boolean)true 
/pipeline0/dvdreadsrc0.src: active = TRUE 
/pipeline0/dvddemux0.sink: active = TRUE 
/pipeline0/dvddemux0.src: active = TRUE 
/pipeline0/dvddemux0.current_video: active = TRUE 
/pipeline0/dvddemux0.current_audio: active = TRUE 
/pipeline0/dvddemux0.current_subpicture: active = TRUE 
/pipeline0/a52dec0.sink: active = TRUE 
/pipeline0/a52dec0.src: active = TRUE 
/pipeline0/audioconvert0.sink: active = TRUE 
/pipeline0/audioconvert0.src: active = TRUE 
/pipeline0/audioscale0.sink: active = TRUE 
/pipeline0/audioscale0.src: active = TRUE 
/pipeline0/alsasink0.sink: active = TRUE 
/pipeline0/dvddemux0.video_00: active = TRUE 
/pipeline0/dvddemux0.current_audio: caps = audio/x-ac3 
/pipeline0/a52dec0.sink: caps = audio/x-ac3 
/pipeline0/dvddemux0.audio_00: active = TRUE 
/pipeline0/audioscale0.src: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/alsasink0.sink: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/audioconvert0.src: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/audioscale0.sink: caps = audio/x-raw-int, rate=(int)48000, 
channels=(int)6, endianness=(int)1234, width=(int)16, depth=(int)16, 
signed=(boolean)true, channel-positions=(GstAudioChannelPosition)< 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE > 
/pipeline0/a52dec0.src: caps = audio/x-raw-float, endianness=(int)1234, 
width=(int)32, channels=(int)6, rate=(int)48000, buffer-frames=(int)0, 
channel-positions=(GstAudioChannelPosition)< GST_AUDIO_CHANNEL_POSITION_LFE, 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, 
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, 
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT > 
/pipeline0/audioconvert0.sink: caps = audio/x-raw-float, endianness=(int)1234, 
width=(int)32, channels=(int)6, rate=(int)48000, buffer-frames=(int)0, 
channel-positions=(GstAudioChannelPosition)< GST_AUDIO_CHANNEL_POSITION_LFE, 
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, 
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, 
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, 
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT > 
/pipeline0/dvddemux0.audio_01: active = TRUE 
/pipeline0/dvddemux0.audio_03: active = TRUE 
/pipeline0/dvddemux0.audio_04: active = TRUE 
/pipeline0/dvddemux0.subpicture_02: active = TRUE 
/pipeline0/dvddemux0.subpicture_01: active = TRUE 
/pipeline0/dvddemux0.subpicture_00: active = TRUE 
Caught interrupt. 
 
 
Cheers 
 -Tim

Comment 1 Tim-Philipp Müller 2004-12-09 20:47:35 UTC

Errm, ignore third remark please - it doesn't make sense ;) 
 
Cheers 
 -Tim

Comment 2 David Schleef 2004-12-16 22:33:10 UTC

audioscale doesn't handle more than 2 channels, and should probably enforce that
in caps.  Fixed.

Comment 3 Ronald Bultje 2004-12-16 22:55:50 UTC

That's a good fix, but I'd still like to have a decent >2 channels resampler.

Comment 4 David Schleef 2004-12-16 23:52:16 UTC

I reenabled passthru of multichannel audio, which should cover many use cases.

Comment 5 Ronald Bultje 2004-12-23 15:27:14 UTC

Thomas, passthrough != resampling. This needs to stay open as an enhancement
request.

Comment 6 Tim-Philipp Müller 2006-07-24 16:15:18 UTC

This works all fine these days, at least in HEAD, closing.