提交 b46be727 编写于 作者: T Timofei Bondarenko 提交者: Jaroslav Kysela

[ALSA] cmipci - allow capture of raw spdif subframes

Enable capturing of raw 32bit IEC958_SUBFRAME.
The 24-bits PCM data can be obtained using iec958 plugin.
Known problem: captured stream may begin with either left or right
subframe. Since the iec958 plugin doesn't decode preamble it may swap
the channels sometime.
Signed-off-by: NTimofei Bondarenko <tim@ipi.ac.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>
上级 feb77712
......@@ -1407,6 +1407,11 @@ static int snd_cmipci_capture_spdif_prepare(struct snd_pcm_substream *substream)
else
snd_cmipci_clear_bit(cm, CM_REG_CHFORMAT, CM_DBLSPDS);
}
if (snd_pcm_format_width(substream->runtime->format) > 16)
snd_cmipci_set_bit(cm, CM_REG_MISC_CTRL, CM_SPD32SEL);
else
snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_SPD32SEL);
spin_unlock_irq(&cm->reg_lock);
return snd_cmipci_pcm_prepare(cm, &cm->channel[CM_CH_CAPT], substream);
......@@ -1418,6 +1423,7 @@ static int snd_cmipci_capture_spdif_hw_free(struct snd_pcm_substream *subs)
spin_lock_irq(&cm->reg_lock);
snd_cmipci_clear_bit(cm, CM_REG_FUNCTRL1, CM_CAPTURE_SPDF);
snd_cmipci_clear_bit(cm, CM_REG_MISC_CTRL, CM_SPD32SEL);
spin_unlock_irq(&cm->reg_lock);
return snd_cmipci_hw_free(subs);
......@@ -1569,7 +1575,8 @@ static struct snd_pcm_hardware snd_cmipci_capture_spdif =
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME | SNDRV_PCM_INFO_MMAP_VALID),
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
.rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
.rate_min = 44100,
.rate_max = 48000,
......
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