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Create rate converter plugin SDK

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Created a new rate converter plugin SDK.
A rate converter can be replaced as an extra plugin now.
The default rate converter is a built-in linear converter.

You can find a sample external converter in alsa-plugins package.
This commit is contained in:
Takashi Iwai 2006-04-06 18:37:55 +02:00
parent 8f605df24a
commit 33d69ef33b
8 changed files with 879 additions and 461 deletions
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2
src/pcm/pcm_local.h
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@ -755,6 +755,8 @@ int snd_pcm_hw_open_fd(snd_pcm_t **pcmp, const char *name, int fd, int mmap_emul
int snd_pcm_wait_nocheck(snd_pcm_t *pcm, int timeout);
const char *snd_pcm_rate_get_default_converter(snd_config_t *root);
#define SND_PCM_HW_PARBIT_ACCESS (1U << SND_PCM_HW_PARAM_ACCESS)
#define SND_PCM_HW_PARBIT_FORMAT (1U << SND_PCM_HW_PARAM_FORMAT)
#define SND_PCM_HW_PARBIT_SUBFORMAT (1U << SND_PCM_HW_PARAM_SUBFORMAT)