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spark: implement AC3 passthrough on SPDIF and HDMI

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Note: untested (no hardware). AC3 on HDMI will only work if
AC3 on SPDIF is also selected.
This commit is contained in:
Stefan Seyfried
2012-06-08 22:17:30 +02:00
parent 33e44c8ca3
commit b9f3ae5372
2 changed files with 14 additions and 8 deletions
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18
libspark/audio.cpp
View File

@@ -380,9 +380,17 @@ void cAudio::SetSRS(int /*iq_enable*/, int /*nmgr_enable*/, int /*iq_mode*/, int
lt_debug("%s\n", __FUNCTION__); lt_debug("%s\n", __FUNCTION__);
}; };
void cAudio::SetHdmiDD(bool enable)
{
const char *opt[] = { "pcm", "spdif" };
lt_debug("%s %d\n", __func__, enable);
proc_put("/proc/stb/hdmi/audio_source", opt[enable], strlen(opt[enable]));
}
void cAudio::SetSpdifDD(bool enable) void cAudio::SetSpdifDD(bool enable)
{ {
lt_debug("%s %d\n", __FUNCTION__, enable); lt_debug("%s %d\n", __func__, enable);
setBypassMode(!enable);
}; };
void cAudio::ScheduleMute(bool On) void cAudio::ScheduleMute(bool On)
@@ -399,9 +407,7 @@ void cAudio::EnableAnalogOut(bool enable)
#define AUDIO_BYPASS_OFF 1 #define AUDIO_BYPASS_OFF 1
void cAudio::setBypassMode(bool disable) void cAudio::setBypassMode(bool disable)
{ {
lt_debug("%s %d\n", __FUNCTION__, disable); const char *opt[] = { "passthrough", "downmix" };
int mode = disable ? AUDIO_BYPASS_OFF : AUDIO_BYPASS_ON; lt_debug("%s %d\n", __func__, disable);
if (ioctl(fd, AUDIO_SET_BYPASS_MODE, mode) < 0) proc_put("/proc/stb/audio/ac3", opt[disable], strlen(opt[disable]));
lt_info("%s AUDIO_SET_BYPASS_MODE %d: %m\n", __func__, mode);
return;
} }

4
libspark/audio_lib.h
View File

@@ -86,8 +86,8 @@ class cAudio
int StopClip(); int StopClip();
void getAudioInfo(int &type, int &layer, int& freq, int &bitrate, int &mode); void getAudioInfo(int &type, int &layer, int& freq, int &bitrate, int &mode);
void SetSRS(int iq_enable, int nmgr_enable, int iq_mode, int iq_level); void SetSRS(int iq_enable, int nmgr_enable, int iq_mode, int iq_level);
bool IsHdmiDDSupported() { return false; }; bool IsHdmiDDSupported() { return true; };
void SetHdmiDD(bool) { return; }; void SetHdmiDD(bool enable);
void SetSpdifDD(bool enable); void SetSpdifDD(bool enable);
void ScheduleMute(bool On); void ScheduleMute(bool On);
void EnableAnalogOut(bool enable); void EnableAnalogOut(bool enable);