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ALSA: pcmtest: Move buffer iterator initialization to prepare callback 

Trigger callback is not the best place for buffer iterator
initialization, so move it out to the prepare callback, where it
have to be.

Minor enhancement: remove blank line.

Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20230804110740.9867-1-ivan.orlov0322@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Ivan Orlov 2023-08-04 15:07:39 +04:00 committed by Takashi Iwai
parent d700a11633
commit 205b96e307
1 changed files with 16 additions and 17 deletions
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33
sound/drivers/pcmtest.c
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@ -92,7 +92,6 @@ MODULE_PARM_DESC(inject_trigger_err, "Inject EINVAL error in the 'trigger' callb
module_param(inject_open_err, bool, 0600);
MODULE_PARM_DESC(inject_open_err, "Inject EBUSY error in the 'open' callback");
struct pcmtst {
struct snd_pcm *pcm;
struct snd_card *card;
@ -405,25 +404,9 @@ static int snd_pcmtst_pcm_close(struct snd_pcm_substream *substream)
static int snd_pcmtst_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct pcmtst_buf_iter *v_iter = runtime->private_data;
if (inject_trigger_err)
return -EINVAL;
v_iter->sample_bytes = runtime->sample_bits / 8;
v_iter->period_bytes = frames_to_bytes(runtime, runtime->period_size);
if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED ||
runtime->access == SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED) {
v_iter->chan_block = runtime->dma_bytes / runtime->channels;
v_iter->interleaved = false;
} else {
v_iter->interleaved = true;
}
// We want to record RATE * ch_cnt samples per sec, it is rate * sample_bytes * ch_cnt bytes
v_iter->s_rw_ch = runtime->rate / TIMER_PER_SEC;
v_iter->b_rw = v_iter->s_rw_ch * v_iter->sample_bytes * runtime->channels;
return 0;
}
@ -454,8 +437,24 @@ static void pcmtst_pdev_release(struct device *dev)
static int snd_pcmtst_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct pcmtst_buf_iter *v_iter = runtime->private_data;
if (inject_prepare_err)
return -EINVAL;
v_iter->sample_bytes = samples_to_bytes(runtime, 1);
v_iter->period_bytes = snd_pcm_lib_period_bytes(substream);
v_iter->interleaved = true;
if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED ||
runtime->access == SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED) {
v_iter->chan_block = snd_pcm_lib_buffer_bytes(substream) / runtime->channels;
v_iter->interleaved = false;
}
// We want to record RATE * ch_cnt samples per sec, it is rate * sample_bytes * ch_cnt bytes
v_iter->s_rw_ch = runtime->rate / TIMER_PER_SEC;
v_iter->b_rw = v_iter->s_rw_ch * v_iter->sample_bytes * runtime->channels;
return 0;
}