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PCM: Allow to run older version of extplug plugin

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Also show the incompatible plugin version number in error messages.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2012-08-15 17:05:37 +02:00
parent d0ca075621
commit 59de61e5b5
2 changed files with 8 additions and 4 deletions
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9
src/pcm/pcm_extplug.c
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@ -641,8 +641,11 @@ int snd_pcm_extplug_create(snd_pcm_extplug_t *extplug, const char *name,
assert(extplug->callback->transfer);
assert(slave_conf);
if (extplug->version != SND_PCM_EXTPLUG_VERSION) {
SNDERR("extplug: Plugin version mismatch\n");
/* We support 1.0.0 to current */
if (extplug->version < 0x010000 ||
extplug->version > SND_PCM_EXTPLUG_VERSION) {
SNDERR("extplug: Plugin version mismatch: 0x%x\n",
extplug->version);
return -ENXIO;
}
@ -668,7 +671,7 @@ int snd_pcm_extplug_create(snd_pcm_extplug_t *extplug, const char *name,
ext->plug.undo_write = snd_pcm_plugin_undo_write_generic;
ext->plug.gen.slave = spcm;
ext->plug.gen.close_slave = 1;
if (extplug->callback->init)
if (extplug->version >= 0x010001 && extplug->callback->init)
ext->plug.init = snd_pcm_extplug_init;
err = snd_pcm_new(&pcm, SND_PCM_TYPE_EXTPLUG, name, stream, mode);