static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime)
{
int err;
- if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+ err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ if (err < 0)
return err;
- if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
+ err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX);
+ if (err < 0)
return err;
return 0;
}
struct snd_dummy *dummy;
spinlock_t lock;
struct timer_list timer;
- unsigned int pcm_size;
- unsigned int pcm_count;
+ unsigned int pcm_buffer_size;
+ unsigned int pcm_period_size;
unsigned int pcm_bps; /* bytes per second */
- unsigned int pcm_jiffie; /* bytes per one jiffie */
+ unsigned int pcm_hz; /* HZ */
unsigned int pcm_irq_pos; /* IRQ position */
unsigned int pcm_buf_pos; /* position in buffer */
struct snd_pcm_substream *substream;
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dummy_pcm *dpcm = runtime->private_data;
- unsigned int bps;
+ int bps;
+
+ bps = snd_pcm_format_width(runtime->format) * runtime->rate *
+ runtime->channels / 8;
- bps = runtime->rate * runtime->channels;
- bps *= snd_pcm_format_width(runtime->format);
- bps /= 8;
if (bps <= 0)
return -EINVAL;
+
dpcm->pcm_bps = bps;
- dpcm->pcm_jiffie = bps / HZ;
- dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
- dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
+ dpcm->pcm_hz = HZ;
+ dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream);
+ dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream);
dpcm->pcm_irq_pos = 0;
dpcm->pcm_buf_pos = 0;
+
+ snd_pcm_format_set_silence(runtime->format, runtime->dma_area,
+ bytes_to_samples(runtime, runtime->dma_bytes));
+
return 0;
}
spin_lock_irqsave(&dpcm->lock, flags);
dpcm->timer.expires = 1 + jiffies;
add_timer(&dpcm->timer);
- dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
- dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
- dpcm->pcm_buf_pos %= dpcm->pcm_size;
- if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
- dpcm->pcm_irq_pos %= dpcm->pcm_count;
+ dpcm->pcm_irq_pos += dpcm->pcm_bps;
+ dpcm->pcm_buf_pos += dpcm->pcm_bps;
+ dpcm->pcm_buf_pos %= dpcm->pcm_buffer_size * dpcm->pcm_hz;
+ if (dpcm->pcm_irq_pos >= dpcm->pcm_period_size * dpcm->pcm_hz) {
+ dpcm->pcm_irq_pos %= dpcm->pcm_period_size * dpcm->pcm_hz;
spin_unlock_irqrestore(&dpcm->lock, flags);
snd_pcm_period_elapsed(dpcm->substream);
} else
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_dummy_pcm *dpcm = runtime->private_data;
- return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
+ return bytes_to_frames(runtime, dpcm->pcm_buf_pos / dpcm->pcm_hz);
}
static struct snd_pcm_hardware snd_card_dummy_playback =
if ((dpcm = new_pcm_stream(substream)) == NULL)
return -ENOMEM;
runtime->private_data = dpcm;
+ /* makes the infrastructure responsible for freeing dpcm */
runtime->private_free = snd_card_dummy_runtime_free;
runtime->hw = snd_card_dummy_playback;
if (substream->pcm->device & 1) {
}
if (substream->pcm->device & 2)
runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
- if ((err = add_playback_constraints(runtime)) < 0) {
- kfree(dpcm);
+ err = add_playback_constraints(runtime);
+ if (err < 0)
return err;
- }
return 0;
}
if ((dpcm = new_pcm_stream(substream)) == NULL)
return -ENOMEM;
runtime->private_data = dpcm;
+ /* makes the infrastructure responsible for freeing dpcm */
runtime->private_free = snd_card_dummy_runtime_free;
runtime->hw = snd_card_dummy_capture;
if (substream->pcm->device == 1) {
}
if (substream->pcm->device & 2)
runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
- if ((err = add_capture_constraints(runtime)) < 0) {
- kfree(dpcm);
+ err = add_capture_constraints(runtime);
+ if (err < 0)
return err;
- }
return 0;
}
struct snd_pcm *pcm;
int err;
- if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device,
- substreams, substreams, &pcm)) < 0)
+ err = snd_pcm_new(dummy->card, "Dummy PCM", device,
+ substreams, substreams, &pcm);
+ if (err < 0)
return err;
dummy->pcm = pcm;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
unsigned int idx;
int err;
- snd_assert(dummy != NULL, return -EINVAL);
+ if (snd_BUG_ON(!dummy))
+ return -EINVAL;
spin_lock_init(&dummy->mixer_lock);
strcpy(card->mixername, "Dummy Mixer");
for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) {
- if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
+ err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy));
+ if (err < 0)
return err;
}
return 0;
pcm_substreams[dev] = 1;
if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
- if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
+ err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev]);
+ if (err < 0)
goto __nodev;
}
- if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
+ err = snd_card_dummy_new_mixer(dummy);
+ if (err < 0)
goto __nodev;
strcpy(card->driver, "Dummy");
strcpy(card->shortname, "Dummy");
snd_card_set_dev(card, &devptr->dev);
- if ((err = snd_card_register(card)) == 0) {
+ err = snd_card_register(card);
+ if (err == 0) {
platform_set_drvdata(devptr, card);
return 0;
}
{
int i, cards, err;
- if ((err = platform_driver_register(&snd_dummy_driver)) < 0)
+ err = platform_driver_register(&snd_dummy_driver);
+ if (err < 0)
return err;
cards = 0;