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pcm: file: use snd_pcm_file_areas_read_infile for readi

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use previously introduced helper function, this commit unifies behavior
of readi and readn

corner case behavior of readi is changed by this commit, previously,
in case 0 bytes were red from file (EOF), frames = 0 was returned,
signaling api user as if no data was red from slave, after the patch,
amount of frames red from slave with data red from slave stored in buffer
is returned when EOF is reached

Signed-off-by: Adam Miartus <amiartus@de.adit-jv.com>
Reviewed-by: Timo Wischer <twischer@de.adit-jv.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Adam Miartus 2019-05-21 15:33:08 +02:00 • committed by Takashi Iwai
parent 5f2e5af61b
commit 349b42f547
1 changed files with 13 additions and 14 deletions
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25
src/pcm/pcm_file.c
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@ -579,22 +579,21 @@ static snd_pcm_sframes_t snd_pcm_file_readi(snd_pcm_t *pcm, void *buffer, snd_pc
{
snd_pcm_file_t *file = pcm->private_data;
snd_pcm_channel_area_t areas[pcm->channels];
snd_pcm_sframes_t n;
snd_pcm_sframes_t frames;
n = _snd_pcm_readi(file->gen.slave, buffer, size);
if (n <= 0)
return n;
if (file->ifd >= 0) {
__snd_pcm_lock(pcm);
n = read(file->ifd, buffer, n * pcm->frame_bits / 8);
__snd_pcm_unlock(pcm);
if (n < 0)
return n;
n = n * 8 / pcm->frame_bits;
}
frames = _snd_pcm_readi(file->gen.slave, buffer, size);
if (frames <= 0)
return frames;
snd_pcm_areas_from_buf(pcm, areas, buffer);
snd_pcm_file_add_frames(pcm, areas, 0, n);
return n;
snd_pcm_file_areas_read_infile(pcm, areas, 0, frames);
snd_pcm_file_add_frames(pcm, areas, 0, frames);
__snd_pcm_unlock(pcm);
return frames;
}
/* locking */