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format: Allow format->sample spec conversion for compressed formats

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This allows clients to get a "fake" sample space for compressed formats
that we can support. This should make size/time conversion for things
like calculating buffer attributes simpler.
This commit is contained in:
Arun Raghavan 2012-03-05 20:30:33 +05:30
parent 8baf8e90c2
commit a0706e7c84
6 changed files with 38 additions and 43 deletions
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7
src/pulse/format.h
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@ -118,8 +118,11 @@ pa_format_info* pa_format_info_from_string(const char *str);
/** Utility function to take a \a pa_sample_spec and generate the corresponding \a pa_format_info. \since 2.0 */
pa_format_info* pa_format_info_from_sample_spec(pa_sample_spec *ss, pa_channel_map *map);
/** Utility function to generate a \a pa_sample_spec and \a pa_channel_map corresponding to a given \a pa_format_info. Returns
* a negative integer if conversion failed and 0 on success. \since 2.0 */
/** Utility function to generate a \a pa_sample_spec and \a pa_channel_map corresponding to a given \a pa_format_info. The
* conversion for PCM formats is straight-forward. For non-PCM formats, if there is a fixed size-time conversion (i.e. all
* IEC61937-encapsulated formats), a "fake" sample spec whose size-time conversion corresponds to this format is provided and
* the channel map argument is ignored. For formats with variable size-time conversion, this function will fail. Returns a
* negative integer if conversion failed and 0 on success. \since 2.0 */
int pa_format_info_to_sample_spec(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map);
/** Represents the type of value type of a property on a \ref pa_format_info. \since 2.0 */