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fix for no seek handler defined

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We need to use the emitv signal emit function to be able to set a default value.
This commit is contained in:
John Cupitt 2019-12-06 16:58:01 +00:00
parent a50405c1f7
commit d10c870a32
1 changed files with 26 additions and 4 deletions
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30
libvips/iofuncs/streamiu.c
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@ -95,16 +95,38 @@ static gint64
vips_streamiu_seek_real( VipsStreami *streami,
gint64 offset, int whence )
{
GValue args[3] = { 0 };
GValue result = { 0 };
gint64 new_position;
VIPS_DEBUG_MSG( "vips_streamiu_seek_real:\n" );
/* If there's no user action attached, we fail.
/* Set the signal args.
*/
new_position = -1;
g_value_init( &args[0], G_TYPE_OBJECT );
g_value_set_object( &args[0], streami );
g_value_init( &args[1], G_TYPE_INT64 );
g_value_set_int64( &args[1], offset );
g_value_init( &args[2], G_TYPE_INT );
g_value_set_int( &args[2], whence );
g_signal_emit( streami, vips_streamiu_signals[SIG_SEEK], 0,
offset, whence, &new_position );
/* Set the default value if no handlers are attached.
*/
g_value_init( &result, G_TYPE_INT64 );
g_value_set_int64( &result, -1 );
/* We need to use this signal interface since we want a default value
* if no handlers are attached.
*/
g_signal_emitv( (const GValue *) &args,
vips_streamiu_signals[SIG_SEEK], 0, &result );
new_position = g_value_get_int64( &result );
g_value_unset( &args[0] );
g_value_unset( &args[1] );
g_value_unset( &args[2] );
g_value_unset( &result );
VIPS_DEBUG_MSG( " vips_streamiu_seek_real, seen new pos %zd\n",
new_position );