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filter_plugin: allow open() to force an input format

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Make the audio_format argument non-const.  Allow the open() method to
modify it, to indicate that it wants a different input audio format
than the one specified.  Check that condition in chain_filter_open(),
and fail.
This commit is contained in:
Max Kellermann
2009-12-25 14:27:32 +01:00
parent d2051c7f50
commit b54bde6f2b
8 changed files with 64 additions and 40 deletions
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13
src/filter_plugin.c
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@@ -74,18 +74,23 @@ filter_free(struct filter *filter)
}
const struct audio_format *
filter_open(struct filter *filter, const struct audio_format *audio_format,
filter_open(struct filter *filter, struct audio_format *audio_format,
GError **error_r)
{
const struct audio_format *out_audio_format;
assert(filter != NULL);
assert(audio_format != NULL);
assert(audio_format_valid(audio_format));
assert(error_r == NULL || *error_r == NULL);
audio_format = filter->plugin->open(filter, audio_format, error_r);
assert(audio_format == NULL || audio_format_valid(audio_format));
out_audio_format = filter->plugin->open(filter, audio_format, error_r);
return audio_format;
assert(out_audio_format == NULL || audio_format_valid(audio_format));
assert(out_audio_format == NULL ||
audio_format_valid(out_audio_format));
return out_audio_format;
}
void