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audio_format: added validation functions

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In addition to audio_format_valid(), provide functions which validate
only one attribute of an audio_format.  These functions are reused by
audio_format_parse().
This commit is contained in:
Max Kellermann
2009-02-11 18:00:48 +01:00
parent 5090cf6484
commit 3bc4224bfd
2 changed files with 37 additions and 6 deletions
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37
src/audio_format.h
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@@ -40,15 +40,46 @@ static inline bool audio_format_defined(const struct audio_format *af)
return af->sample_rate != 0;
}
/**
* Checks whether the sample rate is valid.
*
* @param sample_rate the sample rate in Hz
*/
static inline bool
audio_valid_sample_rate(unsigned sample_rate)
{
return sample_rate > 0 && sample_rate < (1 << 30);
}
/**
* Checks whether the sample format is valid.
*
* @param bits the number of significant bits per sample
*/
static inline bool
audio_valid_sample_format(unsigned bits)
{
return bits == 16 || bits == 24 || bits == 8;
}
/**
* Checks whether the number of channels is valid.
*/
static inline bool
audio_valid_channel_count(unsigned channels)
{
return channels == 1 || channels == 2;
}
/**
* Returns false if the format is not valid for playback with MPD.
* This function performs some basic validity checks.
*/
static inline bool audio_format_valid(const struct audio_format *af)
{
return af->sample_rate > 0 &&
(af->bits == 8 || af->bits == 16 || af->bits == 24) &&
af->channels >= 1;
return audio_valid_sample_rate(af->sample_rate) &&
audio_valid_sample_format(af->bits) &&
audio_valid_channel_count(af->channels);
}
static inline bool audio_format_equals(const struct audio_format *a,