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Remove callback from cosmoaudio API

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Using callbacks is still problematic with cosmo_dlopen() due to the need
to restore the TLS register. So using callbacks is even more strict than
using signal handlers. We are better off introducing a cosmoaudio_poll()
function. It makes the API more UNIX-like. How bad could the latency be?
This commit is contained in:
Justine Tunney 2024-09-07 17:42:15 -07:00
parent d99f066114
commit d50d954a3c
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GPG key ID: BE714B4575D6E328
17 changed files with 433 additions and 158 deletions
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35
dsp/audio/audio.c
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@ -58,7 +58,9 @@ static struct {
typeof(cosmoaudio_open) *open;
typeof(cosmoaudio_close) *close;
typeof(cosmoaudio_write) *write;
typeof(cosmoaudio_flush) *flush;
typeof(cosmoaudio_read) *read;
typeof(cosmoaudio_poll) *poll;
} g_audio;
static const char *cosmoaudio_tmp_dir(void) {
@ -232,7 +234,9 @@ WeAreGood:
g_audio.open = cosmo_dlsym(handle, "cosmoaudio_open");
g_audio.close = cosmo_dlsym(handle, "cosmoaudio_close");
g_audio.write = cosmo_dlsym(handle, "cosmoaudio_write");
g_audio.flush = cosmo_dlsym(handle, "cosmoaudio_flush");
g_audio.read = cosmo_dlsym(handle, "cosmoaudio_read");
g_audio.poll = cosmo_dlsym(handle, "cosmoaudio_poll");
}
static void cosmoaudio_init(void) {
@ -295,3 +299,34 @@ COSMOAUDIO_ABI int cosmoaudio_read(struct CosmoAudio *ca, float *data,
cosmoaudio_describe_status(sbuf, sizeof(sbuf), status));
return status;
}
COSMOAUDIO_ABI int cosmoaudio_flush(struct CosmoAudio *ca) {
int status;
char sbuf[32];
if (g_audio.flush)
status = g_audio.flush(ca);
else
status = COSMOAUDIO_ELINK;
DATATRACE("cosmoaudio_flush(%p) → %s", ca,
cosmoaudio_describe_status(sbuf, sizeof(sbuf), status));
return status;
}
COSMOAUDIO_ABI int cosmoaudio_poll(struct CosmoAudio *ca,
int *in_out_readFrames,
int *in_out_writeFrames) {
int status;
char sbuf[32];
char fbuf[2][20];
if (g_audio.poll)
status = g_audio.poll(ca, in_out_readFrames, in_out_writeFrames);
else
status = COSMOAUDIO_ELINK;
DATATRACE("cosmoaudio_poll(%p, %s, %s) → %s", ca,
cosmoaudio_describe_poll_frames(fbuf[0], sizeof(fbuf[0]),
in_out_readFrames),
cosmoaudio_describe_poll_frames(fbuf[1], sizeof(fbuf[1]),
in_out_writeFrames),
cosmoaudio_describe_status(sbuf, sizeof(sbuf), status));
return status;
}