29 Jun
2005
29 Jun
'05
9:42 a.m.
On Wed, 2005-06-29 at 13:57 +0300, Artemio wrote:
I have a problem with creating a plugin with more than
one control
port. In the attachment you'll find "booster-simple.c" which has one
"Gain" port and my attempt to add a second port in "booster.c". For
some reason the latter cannot be used - the sources seem to be
correct, it compiles fine, but then if I test with "applyplugin" it
segfaults and other hosts complain about a malloc() error and hang.
From booster.c:
#define BOOSTER_INPUT1 0
#define BOOSTER_OUTPUT1 1
#define BOOSTER_INPUT2 2
#define BOOSTER_OUTPUT2 3
#define BOOSTER_GAIN 4
#define BOOSTER_ASYMMETRY 5
...
g_psMonoDescriptor->PortCount = 4;
piPortDescriptors = (LADSPA_PortDescriptor *)calloc(4,
sizeof(LADSPA_PortDescriptor));
g_psMonoDescriptor->PortDescriptors
= (const LADSPA_PortDescriptor *)piPortDescriptors;
piPortDescriptors[BOOSTER_GAIN] = LADSPA_PORT_INPUT|LADSPA_PORT_CONTROL;
piPortDescriptors[BOOSTER_ASYMMETRY] =
LADSPA_PORT_INPUT|LADSPA_PORT_CONTROL;
piPortDescriptors[BOOSTER_INPUT1] = LADSPA_PORT_INPUT|LADSPA_PORT_AUDIO;
piPortDescriptors[BOOSTER_OUTPUT1] =
LADSPA_PORT_OUTPUT|LADSPA_PORT_AUDIO;
First you set the PortCount to 4 and allocate an array of 4
LADSPA_PortDescriptor variables, and then you try to access index
BOOSTER_GAIN and BOOSTER_ASYMMETRY in the array, which are defined as 4
and 5. That is bound to cause all sorts of problems.
--
Lars Luthman
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