audio policy: fix output stream selection
Make sure that all outputs considered by selectOutput()
when called from AudioPolicyManager::getOutputForDevice()
support the requested audio format.
Bug: 17340382.
Change-Id: I76520ce60e9a8fe4d2d23125d6143bb016522754
diff --git a/services/audiopolicy/AudioPolicyManager.cpp b/services/audiopolicy/AudioPolicyManager.cpp
index 6446a6e..6adcde4 100644
--- a/services/audiopolicy/AudioPolicyManager.cpp
+++ b/services/audiopolicy/AudioPolicyManager.cpp
@@ -485,7 +485,9 @@
// request to reuse existing output stream if one is already opened to reach the RX device
SortedVector<audio_io_handle_t> outputs =
getOutputsForDevice(rxDevice, mOutputs);
- audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
+ audio_io_handle_t output = selectOutput(outputs,
+ AUDIO_OUTPUT_FLAG_NONE,
+ AUDIO_FORMAT_INVALID);
if (output != AUDIO_IO_HANDLE_NONE) {
sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
ALOG_ASSERT(!outputDesc->isDuplicated(),
@@ -524,7 +526,9 @@
SortedVector<audio_io_handle_t> outputs =
getOutputsForDevice(AUDIO_DEVICE_OUT_TELEPHONY_TX, mOutputs);
- audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
+ audio_io_handle_t output = selectOutput(outputs,
+ AUDIO_OUTPUT_FLAG_NONE,
+ AUDIO_FORMAT_INVALID);
// request to reuse existing output stream if one is already opened to reach the TX
// path output device
if (output != AUDIO_IO_HANDLE_NONE) {
@@ -1016,7 +1020,9 @@
// routing change will happen when startOutput() will be called
SortedVector<audio_io_handle_t> outputs = getOutputsForDevice(device, mOutputs);
- output = selectOutput(outputs, flags);
+ // at this stage we should ignore the DIRECT flag as no direct output could be found earlier
+ flags = (audio_output_flags_t)(flags & ~AUDIO_OUTPUT_FLAG_DIRECT);
+ output = selectOutput(outputs, flags, format);
}
ALOGW_IF((output == 0), "getOutput() could not find output for stream %d, samplingRate %d,"
"format %d, channels %x, flags %x", stream, samplingRate, format, channelMask, flags);
@@ -1027,7 +1033,8 @@
}
audio_io_handle_t AudioPolicyManager::selectOutput(const SortedVector<audio_io_handle_t>& outputs,
- audio_output_flags_t flags)
+ audio_output_flags_t flags,
+ audio_format_t format)
{
// select one output among several that provide a path to a particular device or set of
// devices (the list was previously build by getOutputsForDevice()).
@@ -1050,6 +1057,17 @@
for (size_t i = 0; i < outputs.size(); i++) {
sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(outputs[i]);
if (!outputDesc->isDuplicated()) {
+ // if a valid format is specified, skip output if not compatible
+ if (format != AUDIO_FORMAT_INVALID) {
+ if (outputDesc->mFlags & AUDIO_OUTPUT_FLAG_DIRECT) {
+ if (format != outputDesc->mFormat) {
+ continue;
+ }
+ } else if (!audio_is_linear_pcm(format)) {
+ continue;
+ }
+ }
+
int commonFlags = popcount(outputDesc->mProfile->mFlags & flags);
if (commonFlags > maxCommonFlags) {
outputFlags = outputs[i];
@@ -2307,7 +2325,9 @@
mOutputs);
// if the sink device is reachable via an opened output stream, request to go via
// this output stream by adding a second source to the patch description
- audio_io_handle_t output = selectOutput(outputs, AUDIO_OUTPUT_FLAG_NONE);
+ audio_io_handle_t output = selectOutput(outputs,
+ AUDIO_OUTPUT_FLAG_NONE,
+ AUDIO_FORMAT_INVALID);
if (output != AUDIO_IO_HANDLE_NONE) {
sp<AudioOutputDescriptor> outputDesc = mOutputs.valueFor(output);
if (outputDesc->isDuplicated()) {