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alsa-util: Perform format and rate detection before setting HW params

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Perform detection of supported sample format and rates just after device is
opened, before `snd_pcm_hw_params()` is called for the first time. This fixes a
problem where device restricts available sample rates after HW params are set
preventing sample rate detection (seen with UAC2 devices and kernel 6.1.9)
This commit is contained in:
Wim Taymans 2023-03-20 18:22:09 +01:00
parent 43770c533c
commit 96ed03e1fc
6 changed files with 69 additions and 5 deletions
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31
spa/plugins/alsa/acp/compat.h
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@ -350,6 +350,37 @@ static inline void pa_xstrfreev(char **a) {
pa_xfreev((void**)a);
}
typedef struct {
size_t size;
char *ptr;
FILE *f;
} pa_strbuf;
static inline pa_strbuf *pa_strbuf_new(void)
{
pa_strbuf *s = pa_xnew0(pa_strbuf,1);
s->f = open_memstream(&s->ptr, &s->size);
return s;
}
static PA_PRINTF_FUNC(2,3) inline size_t pa_strbuf_printf(pa_strbuf *sb, const char *format, ...)
{
int ret;
va_list args;
va_start(args, format);
ret = fprintf(sb->f, format, args);
va_end(args);
return ret > 0 ? ret : 0;
}
static inline char *pa_strbuf_to_string_free(pa_strbuf *sb)
{
char *ptr;
fclose(sb->f);
ptr = sb->ptr;
free(sb);
return ptr;
}
#define pa_cstrerror strerror