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gst/audioconvert/gstchannelmix.c: walk the samples backwards if out_channels > in_channels so we don't overwrite data

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Original commit message from CVS:
* gst/audioconvert/gstchannelmix.c: (gst_audio_convert_mix):
walk the samples backwards if out_channels > in_channels so we don't
overwrite data
This commit is contained in:
Benjamin Otte 2004-11-28 18:26:36 +00:00
parent 4fdf8d5b16
commit 110fd90222
2 changed files with 12 additions and 2 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2004-11-28 Benjamin Otte <otte@gnome.org>
* gst/audioconvert/gstchannelmix.c: (gst_audio_convert_mix):
walk the samples backwards if out_channels > in_channels so we don't
overwrite data
2004-11-28 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* gst/audioconvert/Makefile.am:

8
gst/audioconvert/gstchannelmix.c
View file

@ -524,16 +524,20 @@ gst_audio_convert_passthrough (GstAudioConvert * this)
return TRUE;
}
/* IMPORTANT: out_data == in_data is possible, make sure to not overwrite data
* you might need later on! */
void
gst_audio_convert_mix (GstAudioConvert * this,
gint32 * in_data, gint32 * out_data, gint samples)
{
gint in, out, n;
gint64 res;
gboolean backwards = this->srccaps.channels > this->sinkcaps.channels;
/* FIXME: use liboil here? */
for (out = 0; out < this->srccaps.channels; out++) {
for (n = 0; n < samples; n++) {
for (n = (backwards ? samples - 1 : 0); n < samples && n >= 0;
backwards ? n-- : n++) {
for (out = 0; out < this->srccaps.channels; out++) {
/* convert */
res = 0;
for (in = 0; in < this->sinkcaps.channels; in++) {