AudioFlinger: Add datapath subproject
Test: ALLOW_LOCAL_TIDY_TRUE=1 mm -j .
Bug: 287521708
Merged-In: I1fbe85ff5c5fc58a3e49fa137b4247b33f919ecb
Change-Id: I1fbe85ff5c5fc58a3e49fa137b4247b33f919ecb
(cherry picked from commit 76913a08cba261ea59ca436ee99ff1ea3f2de6e8)
diff --git a/services/audioflinger/datapath/SpdifStreamOut.cpp b/services/audioflinger/datapath/SpdifStreamOut.cpp
new file mode 100644
index 0000000..43e9c0c
--- /dev/null
+++ b/services/audioflinger/datapath/SpdifStreamOut.cpp
@@ -0,0 +1,125 @@
+/*
+**
+** Copyright 2015, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#define LOG_TAG "AudioFlinger"
+//#define LOG_NDEBUG 0
+#include <system/audio.h>
+#include <utils/Log.h>
+
+#include <audio_utils/spdif/SPDIFEncoder.h>
+
+#include "AudioHwDevice.h"
+#include "SpdifStreamOut.h"
+
+namespace android {
+
+/**
+ * If the AudioFlinger is processing encoded data and the HAL expects
+ * PCM then we need to wrap the data in an SPDIF wrapper.
+ */
+SpdifStreamOut::SpdifStreamOut(AudioHwDevice *dev,
+ audio_output_flags_t flags,
+ audio_format_t format)
+ // Tell the HAL that the data will be compressed audio wrapped in a data burst.
+ : AudioStreamOut(dev, (audio_output_flags_t) (flags | AUDIO_OUTPUT_FLAG_IEC958_NONAUDIO))
+ , mSpdifEncoder(this, format)
+{
+}
+
+status_t SpdifStreamOut::open(
+ audio_io_handle_t handle,
+ audio_devices_t devices,
+ struct audio_config *config,
+ const char *address)
+{
+ struct audio_config customConfig = *config;
+
+ mApplicationFormat = config->format;
+ mApplicationSampleRate = config->sample_rate;
+ mApplicationChannelMask = config->channel_mask;
+
+ // Some data bursts run at a higher sample rate.
+ // TODO Move this into the audio_utils as a static method.
+ switch(config->format) {
+ case AUDIO_FORMAT_E_AC3:
+ case AUDIO_FORMAT_E_AC3_JOC:
+ mRateMultiplier = 4;
+ break;
+ case AUDIO_FORMAT_AC3:
+ case AUDIO_FORMAT_DTS:
+ case AUDIO_FORMAT_DTS_HD:
+ mRateMultiplier = 1;
+ break;
+ default:
+ ALOGE("ERROR SpdifStreamOut::open() unrecognized format 0x%08X\n",
+ config->format);
+ return BAD_VALUE;
+ }
+ customConfig.sample_rate = config->sample_rate * mRateMultiplier;
+
+ customConfig.format = AUDIO_FORMAT_PCM_16_BIT;
+ customConfig.channel_mask = AUDIO_CHANNEL_OUT_STEREO;
+
+ // Always print this because otherwise it could be very confusing if the
+ // HAL and AudioFlinger are using different formats.
+ // Print before open() because HAL may modify customConfig.
+ ALOGI("SpdifStreamOut::open() AudioFlinger requested"
+ " sampleRate %d, format %#x, channelMask %#x",
+ config->sample_rate,
+ config->format,
+ config->channel_mask);
+ ALOGI("SpdifStreamOut::open() HAL configured for"
+ " sampleRate %d, format %#x, channelMask %#x",
+ customConfig.sample_rate,
+ customConfig.format,
+ customConfig.channel_mask);
+
+ const status_t status = AudioStreamOut::open(
+ handle,
+ devices,
+ &customConfig,
+ address);
+
+ ALOGI("SpdifStreamOut::open() status = %d", status);
+
+ return status;
+}
+
+int SpdifStreamOut::flush()
+{
+ mSpdifEncoder.reset();
+ return AudioStreamOut::flush();
+}
+
+int SpdifStreamOut::standby()
+{
+ mSpdifEncoder.reset();
+ return AudioStreamOut::standby();
+}
+
+ssize_t SpdifStreamOut::writeDataBurst(const void* buffer, size_t bytes)
+{
+ return AudioStreamOut::write(buffer, bytes);
+}
+
+ssize_t SpdifStreamOut::write(const void* buffer, size_t numBytes)
+{
+ // Write to SPDIF wrapper. It will call back to writeDataBurst().
+ return mSpdifEncoder.write(buffer, numBytes);
+}
+
+} // namespace android