AudioFlinger: add audio session for device effects
Add specific audio session ID for effects applied to a
particular audio device.
Device specific effects will be attached to a particular audio sink or
source device identified by its unique audio port ID and will all use
this same session ID.
Only one session of this type exists on a given playback or record
thread.
All effects in this session apply to the same device ID and are created/released
when the routing (audio patch) of this thread output or input stream is updated.
Bug: 136294538
Test: make
Change-Id: I4e3a55ed1244b918429dd9e217b6efecc1ec6449
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 63bbcc6..e70c776 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1164,7 +1164,7 @@
// and applications not using global effects.
// Enabling post processing in AUDIO_SESSION_OUTPUT_STAGE session does not affect
// global effects
- if ((sessionId != AUDIO_SESSION_OUTPUT_MIX) && (sessionId != AUDIO_SESSION_OUTPUT_STAGE)) {
+ if (!audio_is_global_session(sessionId)) {
setEffectSuspended_l(NULL, enabled, AUDIO_SESSION_OUTPUT_MIX);
}
}
@@ -1179,8 +1179,9 @@
status_t AudioFlinger::RecordThread::checkEffectCompatibility_l(
const effect_descriptor_t *desc, audio_session_t sessionId)
{
- // No global effect sessions on record threads
- if (sessionId == AUDIO_SESSION_OUTPUT_MIX || sessionId == AUDIO_SESSION_OUTPUT_STAGE) {
+ // No global output effect sessions on record threads
+ if (sessionId == AUDIO_SESSION_OUTPUT_MIX
+ || sessionId == AUDIO_SESSION_OUTPUT_STAGE) {
ALOGW("checkEffectCompatibility_l(): global effect %s on record thread %s",
desc->name, mThreadName);
return BAD_VALUE;
@@ -1254,6 +1255,13 @@
" on output stage session", desc->name);
return BAD_VALUE;
}
+ } else if (sessionId == AUDIO_SESSION_DEVICE) {
+ // only post processing on output stage session
+ if ((desc->flags & EFFECT_FLAG_TYPE_MASK) != EFFECT_FLAG_TYPE_POST_PROC) {
+ ALOGW("checkEffectCompatibility_l(): non post processing effect %s not allowed"
+ " on device session", desc->name);
+ return BAD_VALUE;
+ }
} else {
// no restriction on effects applied on non fast tracks
if ((hasAudioSession_l(sessionId) & ThreadBase::FAST_SESSION) == 0) {
@@ -1295,7 +1303,7 @@
return BAD_VALUE;
}
#endif
- if ((sessionId == AUDIO_SESSION_OUTPUT_STAGE) || (sessionId == AUDIO_SESSION_OUTPUT_MIX)) {
+ if (audio_is_global_session(sessionId)) {
ALOGW("checkEffectCompatibility_l(): global effect %s on DUPLICATING"
" thread %s", desc->name, mThreadName);
return BAD_VALUE;
@@ -2051,6 +2059,7 @@
{ // scope for mLock
Mutex::Autolock _l(mLock);
for (audio_session_t session : {
+ AUDIO_SESSION_DEVICE,
AUDIO_SESSION_OUTPUT_STAGE,
AUDIO_SESSION_OUTPUT_MIX,
sessionId,
@@ -3103,7 +3112,7 @@
halOutBuffer = halInBuffer;
effect_buffer_t *buffer = reinterpret_cast<effect_buffer_t*>(halInBuffer->externalData());
ALOGV("addEffectChain_l() %p on thread %p for session %d", chain.get(), this, session);
- if (session > AUDIO_SESSION_OUTPUT_MIX) {
+ if (!audio_is_global_session(session)) {
// Only one effect chain can be present in direct output thread and it uses
// the sink buffer as input
if (mType != DIRECT) {
@@ -3143,8 +3152,11 @@
chain->setThread(this);
chain->setInBuffer(halInBuffer);
chain->setOutBuffer(halOutBuffer);
- // Effect chain for session AUDIO_SESSION_OUTPUT_STAGE is inserted at end of effect
- // chains list in order to be processed last as it contains output stage effects.
+ // Effect chain for session AUDIO_SESSION_DEVICE is inserted at end of effect
+ // chains list in order to be processed last as it contains output device effects.
+ // Effect chain for session AUDIO_SESSION_OUTPUT_STAGE is inserted just before to apply post
+ // processing effects specific to an output stream before effects applied to all streams
+ // routed to a given device.
// Effect chain for session AUDIO_SESSION_OUTPUT_MIX is inserted before
// session AUDIO_SESSION_OUTPUT_STAGE to be processed
// after track specific effects and before output stage.
@@ -3154,7 +3166,8 @@
// chains list to be processed before output mix effects. Relative order between other
// sessions is not important.
static_assert(AUDIO_SESSION_OUTPUT_MIX == 0 &&
- AUDIO_SESSION_OUTPUT_STAGE < AUDIO_SESSION_OUTPUT_MIX,
+ AUDIO_SESSION_OUTPUT_STAGE < AUDIO_SESSION_OUTPUT_MIX &&
+ AUDIO_SESSION_DEVICE < AUDIO_SESSION_OUTPUT_STAGE,
"audio_session_t constants misdefined");
size_t size = mEffectChains.size();
size_t i = 0;
@@ -9099,8 +9112,8 @@
const effect_descriptor_t *desc, audio_session_t sessionId)
{
// No global effect sessions on mmap threads
- if (sessionId == AUDIO_SESSION_OUTPUT_MIX || sessionId == AUDIO_SESSION_OUTPUT_STAGE) {
- ALOGW("checkEffectCompatibility_l(): global effect %s on record thread %s",
+ if (audio_is_global_session(sessionId)) {
+ ALOGW("checkEffectCompatibility_l(): global effect %s on MMAP thread %s",
desc->name, mThreadName);
return BAD_VALUE;
}
@@ -9122,7 +9135,6 @@
}
return NO_ERROR;
-
}
void AudioFlinger::MmapThread::checkInvalidTracks_l()