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alsa-sink: Set more AES bits for passthrough audio

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Based on what PipeWire and Kodi's ALSA engine do.
This commit is contained in:
Arun Raghavan 2022-01-17 22:39:34 -05:00
parent 09e8033c49
commit ce069ebd61
1 changed files with 24 additions and 2 deletions
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26
src/modules/alsa/alsa-sink.c
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@ -1205,10 +1205,32 @@ static int unsuspend(struct userdata *u, bool recovering) {
if ((is_iec958(u) || is_hdmi(u)) && pa_sink_is_passthrough(u->sink)) {
/* Need to open device in NONAUDIO mode */
int len = strlen(u->device_name) + 8;
int len = strlen(u->device_name) + 50;
uint8_t aes3;
switch (u->sink->sample_spec.rate) {
case 22050: aes3 = IEC958_AES3_CON_FS_22050; break;
case 24000: aes3 = IEC958_AES3_CON_FS_24000; break;
case 32000: aes3 = IEC958_AES3_CON_FS_32000; break;
case 44100: aes3 = IEC958_AES3_CON_FS_44100; break;
case 48000: aes3 = IEC958_AES3_CON_FS_48000; break;
case 88200: aes3 = IEC958_AES3_CON_FS_88200; break;
case 96000: aes3 = IEC958_AES3_CON_FS_96000; break;
case 176400: aes3 = IEC958_AES3_CON_FS_176400; break;
case 192000: aes3 = IEC958_AES3_CON_FS_192000; break;
case 768000: aes3 = IEC958_AES3_CON_FS_768000; break;
default: aes3 = IEC958_AES3_CON_FS_NOTID; break;
}
if (u->sink->sample_spec.channels == 8)
aes3 = IEC958_AES3_CON_FS_768000;
device_name = pa_xmalloc(len);
pa_snprintf(device_name, len, "%s,AES0=6", u->device_name);
pa_snprintf(device_name, len, "%s,AES0=0x%02x,AES1=0x%02x,AES2=0x%02x,AES3=0x%02x", u->device_name,
IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO,
IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER,
0, aes3);
pa_log_debug("Opening device for passthrough as: %s", device_name);
}
/*