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ioplug - Fix the refinement of period_* after periods

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When changing only PERIODS after BUFFER_*, ioplug doesn't update
the corresponding PERIOD_* parameters properly.  This should fix
ALSA bug#2601.
This commit is contained in:
Takashi Iwai 2007-11-05 12:46:46 +01:00
parent 2e7cc001a9
commit 07137c0267
1 changed files with 21 additions and 1 deletions
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22
src/pcm/pcm_ioplug.c
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@ -313,7 +313,7 @@ static int snd_pcm_ioplug_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
if (err < 0) if (err < 0)
return err; return err;
change2 |= err; change2 |= err;
/* periods = buffer_bytes / periods */ /* periods = buffer_bytes / period_bytes */
err = rule_div(params, SND_PCM_HW_PARAM_PERIODS, err = rule_div(params, SND_PCM_HW_PARAM_PERIODS,
SND_PCM_HW_PARAM_BUFFER_BYTES, SND_PCM_HW_PARAM_BUFFER_BYTES,
SND_PCM_HW_PARAM_PERIOD_BYTES); SND_PCM_HW_PARAM_PERIOD_BYTES);
@ -344,6 +344,26 @@ static int snd_pcm_ioplug_hw_refine(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
return err; return err;
} }
/* period_bytes = buffer_bytes / periods */
err = rule_div(params, SND_PCM_HW_PARAM_PERIOD_BYTES,
SND_PCM_HW_PARAM_BUFFER_BYTES,
SND_PCM_HW_PARAM_PERIODS);
if (err < 0)
return err;
if (err) {
/* update period_size and period_time */
change |= err;
err = snd_ext_parm_interval_refine(hw_param_interval(params, SND_PCM_HW_PARAM_PERIOD_BYTES),
io->params, SND_PCM_IOPLUG_HW_PERIOD_BYTES);
if (err < 0)
return err;
err = refine_back_time_and_size(params, SND_PCM_HW_PARAM_PERIOD_TIME,
SND_PCM_HW_PARAM_PERIOD_SIZE,
SND_PCM_HW_PARAM_PERIOD_BYTES);
if (err < 0)
return err;
}
params->info = SND_PCM_INFO_BLOCK_TRANSFER; params->info = SND_PCM_INFO_BLOCK_TRANSFER;
p = &io->params[SND_PCM_IOPLUG_HW_ACCESS]; p = &io->params[SND_PCM_IOPLUG_HW_ACCESS];
if (p->active) { if (p->active) {