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* add µlaw/alaw support

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* abstracted resampler API
* add integer-only resampler ("trivial")
* show used resampler wherever useful
* add mixing/volume adjusting for float32ne and u8


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@294 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-11-20 16:23:53 +00:00
parent 8641af3c6d
commit 5f647c8fef
28 changed files with 3237 additions and 192 deletions
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26
polyp/resampler.h
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@ -22,18 +22,44 @@
USA.
***/
#include <samplerate.h>
#include "sample.h"
#include "memblock.h"
#include "memchunk.h"
struct pa_resampler;
enum pa_resample_method {
PA_RESAMPLER_INVALID = -1,
PA_RESAMPLER_SRC_SINC_BEST_QUALITY = SRC_SINC_BEST_QUALITY,
PA_RESAMPLER_SRC_SINC_MEDIUM_QUALITY = SRC_SINC_MEDIUM_QUALITY,
PA_RESAMPLER_SRC_SINC_FASTEST = SRC_SINC_FASTEST,
PA_RESAMPLER_SRC_ZERO_ORDER_HOLD = SRC_ZERO_ORDER_HOLD,
PA_RESAMPLER_SRC_LINEAR = SRC_LINEAR,
PA_RESAMPLER_TRIVIAL,
PA_RESAMPLER_MAX
};
struct pa_resampler* pa_resampler_new(const struct pa_sample_spec *a, const struct pa_sample_spec *b, struct pa_memblock_stat *s, int resample_method);
void pa_resampler_free(struct pa_resampler *r);
/* Returns the size of an input memory block which is required to return the specified amount of output data */
size_t pa_resampler_request(struct pa_resampler *r, size_t out_length);
/* Pass the specified memory chunk to the resampler and return the newly resampled data */
void pa_resampler_run(struct pa_resampler *r, const struct pa_memchunk *in, struct pa_memchunk *out);
/* Change the input rate of the resampler object */
void pa_resampler_set_input_rate(struct pa_resampler *r, uint32_t rate);
/* Return the resampling method of the resampler object */
enum pa_resample_method pa_resampler_get_method(struct pa_resampler *r);
/* Try to parse the resampler method */
enum pa_resample_method pa_parse_resample_method(const char *string);
/* return a human readable string for the specified resampling method. Inverse of pa_parse_resample_method() */
const char *pa_resample_method_to_string(enum pa_resample_method m);
#endif