Home | History | Annotate | Download | only in libaudio 
      1 /*
      2 **
      3 ** Copyright 2014, The Android Open Source Project
      4 **
      5 ** Licensed under the Apache License, Version 2.0 (the "License");
      6 ** you may not use this file except in compliance with the License.
      7 ** You may obtain a copy of the License at
      8 **
      9 **     http://www.apache.org/licenses/LICENSE-2.0
     10 **
     11 ** Unless required by applicable law or agreed to in writing, software
     12 ** distributed under the License is distributed on an "AS IS" BASIS,
     13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14 ** See the License for the specific language governing permissions and
     15 ** limitations under the License.
     16 */
     17 
     18 #define LOG_TAG "AudioHAL:HDMIAudioOutput"
     19 
     20 #include <utils/Log.h>
     21 
     22 #include <stdint.h>
     23 
     24 #include "AudioHardwareOutput.h"
     25 #include "AudioStreamOut.h"
     26 #include "HDMIAudioOutput.h"
     27 
     28 namespace android {
     29 
     30 extern AudioHardwareOutput gAudioHardwareOutput;
     31 
     32 HDMIAudioOutput::HDMIAudioOutput()
     33     : AudioOutput(kHDMI_ALSADeviceName, PCM_FORMAT_S24_LE)
     34 {
     35 }
     36 
     37 HDMIAudioOutput::~HDMIAudioOutput()
     38 {
     39 }
     40 
     41 status_t HDMIAudioOutput::setupForStream(const AudioStreamOut& stream)
     42 {
     43     mFramesPerChunk = stream.framesPerChunk();
     44     mFramesPerSec = stream.outputSampleRate();
     45     mBufferChunks = stream.nomChunksInFlight();
     46     mChannelCnt = audio_channel_count_from_out_mask(stream.chanMask());
     47 
     48     ALOGI("setupForStream format %08x, rate = %u", stream.format(), mFramesPerSec);
     49 
     50     if (!gAudioHardwareOutput.getHDMIAudioCaps().supportsFormat(
     51             stream.format(),
     52             stream.sampleRate(),
     53             mChannelCnt)) {
     54         ALOGE("HDMI Sink does not support format = 0x%0X, srate = %d, #channels = 0%d",
     55                 stream.format(), mFramesPerSec, mChannelCnt);
     56         return BAD_VALUE;
     57     }
     58 
     59     if (stream.isEncoded()) {
     60         ALOGI("HDMIAudioOutput::setupForStream() use %d channels for playing encoded data!",
     61             SPDIF_ENCODED_CHANNEL_COUNT);
     62         mChannelCnt = SPDIF_ENCODED_CHANNEL_COUNT;
     63     }
     64 
     65     setupInternal();
     66 
     67     // TODO Maybe set SPDIF channel status to compressed mode.
     68     // Some receivers do not need the bit set. But some might.
     69 
     70     return initCheck();
     71 }
     72 
     73 #define IEC958_AES0_NONAUDIO      (1<<1)   /* 0 = audio, 1 = non-audio */
     74 
     75 void HDMIAudioOutput::applyPendingVolParams()
     76 {
     77 }
     78 
     79 void HDMIAudioOutput::dump(String8& result)
     80 {
     81     const size_t SIZE = 256;
     82     char buffer[SIZE];
     83 
     84     snprintf(buffer, SIZE,
     85             "\t%s Audio Output\n"
     86             "\t\tSample Rate       : %d\n"
     87             "\t\tChannel Count     : %d\n"
     88             "\t\tState             : %d\n",
     89             getOutputName(),
     90             mFramesPerSec,
     91             mChannelCnt,
     92             mState);
     93     result.append(buffer);
     94 }
     95 
     96 } // namespace android
     97