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alsa: Open iec958 device with NONAUDIO bit set in passthrough mode

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This is required for E-AC3 streams, as well as to let receivers we're
sending non-PCM data (which avoids playing noise if the data is
incorrect for some reason).
This commit is contained in:
Arun Raghavan 2011-08-17 22:38:43 +05:30
parent adbdb6259b
commit 814c0371a4
1 changed files with 13 additions and 1 deletions
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14
src/modules/alsa/alsa-sink.c
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@ -990,13 +990,22 @@ static int unsuspend(struct userdata *u) {
int err; int err;
pa_bool_t b, d; pa_bool_t b, d;
snd_pcm_uframes_t period_size, buffer_size; snd_pcm_uframes_t period_size, buffer_size;
char *device_name = NULL;
pa_assert(u); pa_assert(u);
pa_assert(!u->pcm_handle); pa_assert(!u->pcm_handle);
pa_log_info("Trying resume..."); pa_log_info("Trying resume...");
if ((err = snd_pcm_open(&u->pcm_handle, u->device_name, SND_PCM_STREAM_PLAYBACK, if ((is_spdif(u) || is_hdmi(u)) && pa_sink_is_passthrough(u->sink)) {
/* Need to open device in NONAUDIO mode */
int len = strlen(u->device_name) + 8;
device_name = pa_xmalloc(len);
pa_snprintf(device_name, len, "%s,AES0=6", u->device_name);
}
if ((err = snd_pcm_open(&u->pcm_handle, device_name ? device_name : u->device_name, SND_PCM_STREAM_PLAYBACK,
SND_PCM_NONBLOCK| SND_PCM_NONBLOCK|
SND_PCM_NO_AUTO_RESAMPLE| SND_PCM_NO_AUTO_RESAMPLE|
SND_PCM_NO_AUTO_CHANNELS| SND_PCM_NO_AUTO_CHANNELS|
@ -1050,6 +1059,7 @@ static int unsuspend(struct userdata *u) {
pa_log_info("Resumed successfully..."); pa_log_info("Resumed successfully...");
pa_xfree(device_name);
return 0; return 0;
fail: fail:
@ -1058,6 +1068,8 @@ fail:
u->pcm_handle = NULL; u->pcm_handle = NULL;
} }
pa_xfree(device_name);
return -PA_ERR_IO; return -PA_ERR_IO;
} }