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audio-converter: improve _update_config

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Allow NULL config to keep the existing parameters.
Fix the docs.
This commit is contained in:
Wim Taymans 2016-01-26 17:16:52 +01:00
parent 0f757bc23c
commit 6050509b65
1 changed files with 10 additions and 6 deletions
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16
gst-libs/gst/audio/audio-converter.c
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@ -292,13 +292,16 @@ copy_config (GQuark field_id, const GValue * value, gpointer user_data)
* @convert: a #GstAudioConverter
* @in_rate: input rate
* @out_rate: output rate
* @config: (transfer full): a #GstStructure
* @config: (transfer full) (allow-none): a #GstStructure or %NULL
*
* Set @config as extra configuration for @convert.
* Set @in_rate, @out_rate and @config as extra configuration for @convert.
*
* in_rate and @out_rate specify the new sample rates of input and output
* formats. A value of 0 leaves the sample rate unchanged.
*
* @config can be %NULL, in which case, the current configuration is not
* changed.
*
* If the parameters in @config can not be set exactly, this function returns
* %FALSE and will try to update as much state as possible. The new state can
* then be retrieved and refined with gst_audio_converter_get_config().
@ -306,14 +309,13 @@ copy_config (GQuark field_id, const GValue * value, gpointer user_data)
* Look at the #GST_AUDIO_CONVERTER_OPT_* fields to check valid configuration
* option and values.
*
* Returns: %TRUE when @config could be set.
* Returns: %TRUE when the new parameters could be set
*/
gboolean
gst_audio_converter_update_config (GstAudioConverter * convert,
gint in_rate, gint out_rate, GstStructure * config)
{
g_return_val_if_fail (convert != NULL, FALSE);
g_return_val_if_fail (config != NULL, FALSE);
g_return_val_if_fail ((in_rate == 0 && out_rate == 0) ||
convert->flags & GST_AUDIO_CONVERTER_FLAG_VARIABLE_RATE, FALSE);
@ -327,8 +329,10 @@ gst_audio_converter_update_config (GstAudioConverter * convert,
convert->in.rate = in_rate;
convert->out.rate = out_rate;
gst_structure_foreach (config, copy_config, convert);
gst_structure_free (config);
if (config) {
gst_structure_foreach (config, copy_config, convert);
gst_structure_free (config);
}
return TRUE;
}