Package: libxine1
Version: 1.1.2-3
Severity: important
Please look at xine-lib-1.1.2/src/xine-engine/resample.c
This file contains sound resampling functions. They have the property
that the first sample of the output data is the same as the first input
sample, and the last sample of the output data is the same as the last
input sample. And they don't keep any state between resampling chunks,
i.e., the first call resamples the first N samples, then the next call
resamples the next N samples completely independently. The properties
mentioned above guarantee incorrect behaviour at chunk boundaries.
Namely, suppose that the original sample rate is 22.05 kHz, thus, the
interval between samples is normally 45.351 us. Xine concerts the first
576 samples to 48 kHz, then it converts the next 576 samples. However,
the input sample 575 (counting from zero, i.e., the last sample of the
first chunk) maps _exactly_ to the output sample 1253, and the input
sample 576 maps _exactly_ to the output sample 1254. The time distance
between these signal values becomes 20.833 us instead of the correct
45.351 us. In other words, all data that should be inserted between
these output samples are lost. This manifests itself as a click if the
signal has a non-zero derivative at that point.
The problem is aggravated by the fact that, in the default ALSA dmix
setup, xine always resamples its output to 48 kHz (even though ALSA can
do it better itself with "plug" and libsamplerate), thus, all narrowband
internet radios suffer from clicks in xine.
If you can't fix the xine resampler, please make sure it is not used in
the default plug:dmix setup.
-- System Information:
Debian Release: testing/unstable
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.17-2-686
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Versions of packages libxine1 depends on:
ii libasound2 1.0.12-1 ALSA library
ii libc6 2.3.6.ds1-4 GNU C Library: Shared libraries
ii libcdio6 0.76-1 library to read and control
CD-ROM
ii libfreetype6 2.2.1-5 FreeType 2 font engine,
shared lib
ii libgl1-mesa-glx [ 6.5.0.cvs.20060524-1.1 A free implementation of
the OpenG
ii libglu1-mesa [lib 6.5.0.cvs.20060524-1.1 The OpenGL utility library
(GLU)
ii libice6 1:1.0.1-2 X11 Inter-Client Exchange
library
ii libiso9660-4 0.76-1 library to work with
ISO9660 files
ii libmad0 0.15.1b-2.1 MPEG audio decoder library
ii libmodplug0c2 1:0.7-5.2 shared libraries for mod
music bas
ii libogg0 1.1.3-2 Ogg Bitstream Library
ii libsm6 1:1.0.1-3 X11 Session Management library
ii libspeex1 1.1.12-2 The Speex Speech Codec
ii libstdc++6 4.1.1-13 The GNU Standard C++ Library v3
ii libtheora0 0.0.0.alpha7-1 The Theora Video
Compression Codec
ii libvcdinfo0 0.7.23-3 library to extract
information fro
ii libvorbis0a 1.1.2-1 The Vorbis General Audio
Compressi
ii libx11-6 2:1.0.0-9 X11 client-side library
ii libxext6 1:1.0.1-2 X11 miscellaneous extension
librar
ii libxinerama1 1:1.0.1-4.1 X11 Xinerama extension library
ii libxv1 1:1.0.2-1 X11 Video extension library
ii libxvmc1 1:1.0.2-2 X11 Video extension library
ii zlib1g 1:1.2.3-13 compression library - runtime
Versions of packages libxine1 recommends:
ii libmng1 1.0.9-1 Multiple-image Network
Graphics li
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