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 #include <sound/asound.h> // bionic 24 25 #include "AudioHardwareOutput.h" 26 #include "AudioStreamOut.h" 27 #include "HDMIAudioOutput.h" 28 29 namespace android { 30 31 extern AudioHardwareOutput gAudioHardwareOutput; 32 33 HDMIAudioOutput::HDMIAudioOutput() 34 : AudioOutput(kHDMI_ALSADeviceName, PCM_FORMAT_S24_LE) 35 { 36 } 37 38 HDMIAudioOutput::~HDMIAudioOutput() 39 { 40 } 41 42 status_t HDMIAudioOutput::setupForStream(const AudioStreamOut& stream) 43 { 44 mFramesPerChunk = stream.framesPerChunk(); 45 mFramesPerSec = stream.outputSampleRate(); 46 mBufferChunks = stream.nomChunksInFlight(); 47 mChannelCnt = audio_channel_count_from_out_mask(stream.chanMask()); 48 49 ALOGI("setupForStream format %08x, rate = %u", stream.format(), mFramesPerSec); 50 51 if (!gAudioHardwareOutput.getHDMIAudioCaps().supportsFormat( 52 stream.format(), 53 stream.sampleRate(), 54 mChannelCnt, 55 stream.isIec958NonAudio())) { 56 ALOGE("HDMI Sink does not support format = 0x%0X, srate = %d, #channels = 0%d", 57 stream.format(), mFramesPerSec, mChannelCnt); 58 return BAD_VALUE; 59 } 60 61 setupInternal(); 62 63 setChannelStatusToCompressed(stream.isIec958NonAudio()); 64 65 return initCheck(); 66 } 67 68 void HDMIAudioOutput::applyPendingVolParams() 69 { 70 } 71 72 #define IEC958_AES0_NONAUDIO (1<<1) /* 0 = audio, 1 = non-audio */ 73 74 void HDMIAudioOutput::setChannelStatusToCompressed(bool compressed) 75 { 76 struct snd_aes_iec958 iec958; 77 struct mixer* mixer; 78 int err; 79 const size_t count = 1; 80 81 ALOGI("setChannelStatusToCompressed %d", compressed); 82 83 mixer = mixer_open(mALSACardID); 84 if (mixer == NULL) { 85 ALOGE("Couldn't open mixer on alsa id %d", mALSACardID); 86 return; 87 } 88 89 const char *ctlName = "IEC958 Playback Default"; 90 struct mixer_ctl *ctl = mixer_get_ctl_by_name(mixer, ctlName); 91 if (ctl == NULL) { 92 ALOGE("Couldn't get mixer ctl %s", ctlName); 93 goto finish; 94 } 95 96 // Set count to 1 so we get one complete iec958 structure. 97 err = mixer_ctl_get_array(ctl, &iec958, count); 98 if (err < 0) { 99 ALOGE("Channel Status bit get has failed\n"); 100 goto finish; 101 } 102 103 if (compressed) { 104 iec958.status[0] |= IEC958_AES0_NONAUDIO; 105 } else { 106 iec958.status[0] &= ~IEC958_AES0_NONAUDIO; 107 } 108 109 err = mixer_ctl_set_array(ctl, &iec958, count); 110 if (err < 0) { 111 ALOGE("Channel Status bit set has failed\n"); 112 } 113 114 finish: 115 mixer_close(mixer); 116 } 117 118 void HDMIAudioOutput::dump(String8& result) 119 { 120 const size_t SIZE = 256; 121 char buffer[SIZE]; 122 123 snprintf(buffer, SIZE, 124 "\t%s Audio Output\n" 125 "\t\tSample Rate : %d\n" 126 "\t\tChannel Count : %d\n" 127 "\t\tState : %d\n", 128 getOutputName(), 129 mFramesPerSec, 130 mChannelCnt, 131 mState); 132 result.append(buffer); 133 } 134 135 } // namespace android 136