mirror of
https://github.com/badaix/snapcast.git
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314 lines
8.4 KiB
C++
314 lines
8.4 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2014-2016 Johannes Pohl
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <unistd.h>
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#include <assert.h>
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#include <iostream>
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#include "openslPlayer.h"
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#include "common/log.h"
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#include "common/snapException.h"
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using namespace std;
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// source: https://github.com/hrydgard/native/blob/master/android/native-audio-so.cpp
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// This callback handler is called every time a buffer finishes playing.
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// The documentation available is very unclear about how to best manage buffers.
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// I've chosen to this approach: Instantly enqueue a buffer that was rendered to the last time,
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// and then render the next. Hopefully it's okay to spend time in this callback after having enqueued.
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static void bqPlayerCallback(SLAndroidSimpleBufferQueueItf bq, void *context)
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{
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OpenslPlayer* player = static_cast<OpenslPlayer*>(context);
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player->playerCallback(bq);
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}
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OpenslPlayer::OpenslPlayer(const PcmDevice& pcmDevice, Stream* stream) :
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Player(pcmDevice, stream), pubStream_(stream), bqPlayerObject(NULL), curBuffer(0), frames_(0), buff_size(0)
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{
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}
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OpenslPlayer::~OpenslPlayer()
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{
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stop();
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}
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void OpenslPlayer::playerCallback(SLAndroidSimpleBufferQueueItf bq)
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{
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if (bq != bqPlayerBufferQueue)
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{
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logE << "Wrong bq!\n";
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return;
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}
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/* static long lastTick = 0;
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long now = chronos::getTickCount();
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int diff = 0;
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if (lastTick != 0)
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{
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diff = now - lastTick;
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// logE << "diff: " << diff << ", frames: " << player->frames_ / 44.1 << "\n";
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// if (diff <= 50)
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// {
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// usleep(1000 * (50 - diff));
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// diff = 50;
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// }
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}
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lastTick = chronos::getTickCount();
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*/
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// size_t d = player->frames_ / 0.48d;
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// logE << "Delay: " << d << "\n";
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// SLAndroidSimpleBufferQueueState state;
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// (*bq)->GetState(bq, &state);
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// cout << "bqPlayerCallback count: " << state.count << ", idx: " << state.index << "\n";
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// diff = 0;
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// chronos::usec delay((250 - diff) * 1000);
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// while (active_ && !stream_->waitForChunk(100))
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// logO << "Waiting for chunk\n";
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if (!active_)
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return;
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chronos::usec delay(50 * 1000);
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if (!pubStream_->getPlayerChunk(buffer[curBuffer], delay, frames_))
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{
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// logO << "Failed to get chunk. Playing silence.\n";
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memset(buffer[curBuffer], 0, buff_size);
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}
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else
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{
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adjustVolume(buffer[curBuffer], frames_);
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}
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while (active_)
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{
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SLresult result = (*bq)->Enqueue(bq, buffer[curBuffer], buff_size);
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if (result == SL_RESULT_BUFFER_INSUFFICIENT)
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usleep(1000);
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else
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break;
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}
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curBuffer ^= 1; // Switch buffer
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}
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void OpenslPlayer::initOpensl()
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{
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if (active_)
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return;
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const SampleFormat& format = stream_->getFormat();
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frames_ = 960;//rate / 50; // => 50ms
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buff_size = frames_ * format.channels * 2 /* 2 -> sample size */;
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logO << "frames: " << frames_ << ", channels: " << format.channels << ", rate: " << format.rate << ", buff: " << buff_size << "\n";
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buffer[0] = new char[buff_size];
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buffer[1] = new char[buff_size];
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SLresult result;
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// create engine
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result = slCreateEngine(&engineObject, 0, NULL, 0, NULL, NULL);
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assert(SL_RESULT_SUCCESS == result);
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result = (*engineObject)->Realize(engineObject, SL_BOOLEAN_FALSE);
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assert(SL_RESULT_SUCCESS == result);
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result = (*engineObject)->GetInterface(engineObject, SL_IID_ENGINE, &engineEngine);
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assert(SL_RESULT_SUCCESS == result);
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result = (*engineEngine)->CreateOutputMix(engineEngine, &outputMixObject, 0, 0, 0);
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assert(SL_RESULT_SUCCESS == result);
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result = (*outputMixObject)->Realize(outputMixObject, SL_BOOLEAN_FALSE);
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assert(SL_RESULT_SUCCESS == result);
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SLuint32 sr = SL_SAMPLINGRATE_44_1;
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switch(format.rate)
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{
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case 8000:
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sr = SL_SAMPLINGRATE_8;
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break;
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case 11025:
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sr = SL_SAMPLINGRATE_11_025;
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break;
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case 16000:
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sr = SL_SAMPLINGRATE_16;
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break;
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case 22050:
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sr = SL_SAMPLINGRATE_22_05;
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break;
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case 24000:
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sr = SL_SAMPLINGRATE_24;
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break;
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case 32000:
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sr = SL_SAMPLINGRATE_32;
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break;
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case 44100:
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sr = SL_SAMPLINGRATE_44_1;
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break;
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case 48000:
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sr = SL_SAMPLINGRATE_48;
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break;
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case 64000:
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sr = SL_SAMPLINGRATE_64;
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break;
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case 88200:
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sr = SL_SAMPLINGRATE_88_2;
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break;
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case 96000:
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sr = SL_SAMPLINGRATE_96;
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break;
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case 192000:
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sr = SL_SAMPLINGRATE_192;
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break;
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default:
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throw SnapException("Sample rate not supported");
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}
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SLDataLocator_AndroidSimpleBufferQueue loc_bufq = {SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE, 2};
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SLDataFormat_PCM format_pcm =
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{
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SL_DATAFORMAT_PCM,
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2,
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sr,
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SL_PCMSAMPLEFORMAT_FIXED_16,
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SL_PCMSAMPLEFORMAT_FIXED_16,
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SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT,
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SL_BYTEORDER_LITTLEENDIAN
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};
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SLDataSource audioSrc = {&loc_bufq, &format_pcm};
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// configure audio sink
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SLDataLocator_OutputMix loc_outmix = {SL_DATALOCATOR_OUTPUTMIX, outputMixObject};
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SLDataSink audioSnk = {&loc_outmix, NULL};
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// create audio player
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const SLInterfaceID ids[4] = {SL_IID_ANDROIDCONFIGURATION, SL_IID_PLAY, SL_IID_BUFFERQUEUE, SL_IID_VOLUME};
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const SLboolean req[4] = {SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE};
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result = (*engineEngine)->CreateAudioPlayer(engineEngine, &bqPlayerObject, &audioSrc, &audioSnk, 4, ids, req);
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assert(SL_RESULT_SUCCESS == result);
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SLAndroidConfigurationItf playerConfig;
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result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_ANDROIDCONFIGURATION, &playerConfig);
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assert(SL_RESULT_SUCCESS == result);
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SLint32 streamType = SL_ANDROID_STREAM_MEDIA;
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// SLint32 streamType = SL_ANDROID_STREAM_VOICE;
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result = (*playerConfig)->SetConfiguration(playerConfig, SL_ANDROID_KEY_STREAM_TYPE, &streamType, sizeof(SLint32));
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assert(SL_RESULT_SUCCESS == result);
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result = (*bqPlayerObject)->Realize(bqPlayerObject, SL_BOOLEAN_FALSE);
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assert(SL_RESULT_SUCCESS == result);
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result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_PLAY, &bqPlayerPlay);
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assert(SL_RESULT_SUCCESS == result);
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result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_BUFFERQUEUE, &bqPlayerBufferQueue);
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assert(SL_RESULT_SUCCESS == result);
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result = (*bqPlayerBufferQueue)->RegisterCallback(bqPlayerBufferQueue, bqPlayerCallback, this);
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assert(SL_RESULT_SUCCESS == result);
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result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_VOLUME, &bqPlayerVolume);
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assert(SL_RESULT_SUCCESS == result);
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result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_PLAYING);
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assert(SL_RESULT_SUCCESS == result);
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// Render and enqueue a first buffer. (or should we just play the buffer empty?)
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curBuffer = 0;
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//// audioCallback(buffer[curBuffer], framesPerBuffer);
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active_ = true;
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memset(buffer[curBuffer], 0, buff_size);
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result = (*bqPlayerBufferQueue)->Enqueue(bqPlayerBufferQueue, buffer[curBuffer], sizeof(buffer[curBuffer]));
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if (SL_RESULT_SUCCESS != result)
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throw SnapException("SL_RESULT_SUCCESS != result");
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curBuffer ^= 1;
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}
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void OpenslPlayer::uninitOpensl()
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{
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if (!active_)
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return;
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logE << "uninitOpensl\n";
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SLresult result;
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logO << "OpenSLWrap_Shutdown - stopping playback\n";
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result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_STOPPED);
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if (SL_RESULT_SUCCESS != result)
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{
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logE << "SetPlayState failed\n";
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}
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logO << "OpenSLWrap_Shutdown - deleting player object\n";
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if (bqPlayerObject != NULL)
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{
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(*bqPlayerObject)->Destroy(bqPlayerObject);
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bqPlayerObject = NULL;
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bqPlayerPlay = NULL;
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bqPlayerBufferQueue = NULL;
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bqPlayerMuteSolo = NULL;
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bqPlayerVolume = NULL;
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}
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logO << "OpenSLWrap_Shutdown - deleting mix object\n";
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if (outputMixObject != NULL)
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{
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(*outputMixObject)->Destroy(outputMixObject);
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outputMixObject = NULL;
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}
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logO << "OpenSLWrap_Shutdown - deleting engine object\n";
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if (engineObject != NULL)
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{
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(*engineObject)->Destroy(engineObject);
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engineObject = NULL;
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engineEngine = NULL;
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}
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delete [] buffer[0];
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delete [] buffer[1];
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logO << "OpenSLWrap_Shutdown - finished\n";
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active_ = false;
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}
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void OpenslPlayer::start()
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{
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initOpensl();
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}
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void OpenslPlayer::stop()
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{
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uninitOpensl();
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}
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void OpenslPlayer::worker()
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{
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}
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