tdesktop/Telegram/SourceFiles/media/media_audio_loaders.cpp

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/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "media/media_audio_loaders.h"
#include "media/media_audio.h"
#include "media/media_audio_ffmpeg_loader.h"
#include "media/media_child_ffmpeg_loader.h"
namespace Media {
namespace Player {
Loaders::Loaders(QThread *thread) : _fromVideoNotify([this] { videoSoundAdded(); }) {
moveToThread(thread);
_fromVideoNotify.moveToThread(thread);
connect(thread, SIGNAL(started()), this, SLOT(onInit()));
connect(thread, SIGNAL(finished()), this, SLOT(deleteLater()));
}
void Loaders::feedFromVideo(VideoSoundPart &&part) {
auto invoke = false;
{
QMutexLocker lock(&_fromVideoMutex);
_fromVideoQueues[part.audio].enqueue(FFMpeg::dataWrapFromPacket(*part.packet));
invoke = true;
}
if (invoke) {
_fromVideoNotify.call();
}
}
void Loaders::videoSoundAdded() {
auto waitingAndAdded = false;
auto queues = decltype(_fromVideoQueues)();
{
QMutexLocker lock(&_fromVideoMutex);
queues = base::take(_fromVideoQueues);
}
auto tryLoader = [this](auto &audio, auto &loader, auto &it) {
if (audio == it.key() && loader) {
loader->enqueuePackets(it.value());
if (loader->holdsSavedDecodedSamples()) {
onLoad(audio);
}
return true;
}
return false;
};
for (auto i = queues.begin(), e = queues.end(); i != e; ++i) {
if (!tryLoader(_audio, _audioLoader, i)
&& !tryLoader(_song, _songLoader, i)
&& !tryLoader(_video, _videoLoader, i)) {
for (auto &packetData : i.value()) {
AVPacket packet;
FFMpeg::packetFromDataWrap(packet, packetData);
FFMpeg::freePacket(&packet);
}
}
}
if (waitingAndAdded) {
onLoad(_video);
}
}
Loaders::~Loaders() {
QMutexLocker lock(&_fromVideoMutex);
clearFromVideoQueue();
}
void Loaders::clearFromVideoQueue() {
auto queues = base::take(_fromVideoQueues);
for (auto &queue : queues) {
for (auto &packetData : queue) {
AVPacket packet;
FFMpeg::packetFromDataWrap(packet, packetData);
FFMpeg::freePacket(&packet);
}
}
}
void Loaders::onInit() {
}
void Loaders::onStart(const AudioMsgId &audio, qint64 position) {
auto type = audio.type();
clear(type);
{
QMutexLocker lock(internal::audioPlayerMutex());
if (!mixer()) return;
auto track = mixer()->trackForType(type);
if (!track) return;
track->loading = true;
}
loadData(audio, position);
}
AudioMsgId Loaders::clear(AudioMsgId::Type type) {
AudioMsgId result;
switch (type) {
case AudioMsgId::Type::Voice: std::swap(result, _audio); _audioLoader = nullptr; break;
case AudioMsgId::Type::Song: std::swap(result, _song); _songLoader = nullptr; break;
case AudioMsgId::Type::Video: std::swap(result, _video); _videoLoader = nullptr; break;
}
return result;
}
void Loaders::setStoppedState(Mixer::Track *track, State state) {
mixer()->setStoppedState(track, state);
}
void Loaders::emitError(AudioMsgId::Type type) {
emit error(clear(type));
}
void Loaders::onLoad(const AudioMsgId &audio) {
loadData(audio, 0);
}
void Loaders::loadData(AudioMsgId audio, qint64 position) {
auto err = SetupNoErrorStarted;
auto type = audio.type();
auto l = setupLoader(audio, err, position);
if (!l) {
if (err == SetupErrorAtStart) {
emitError(type);
}
return;
}
auto started = (err == SetupNoErrorStarted);
auto finished = false;
auto waiting = false;
auto errAtStart = started;
QByteArray samples;
int64 samplesCount = 0;
if (l->holdsSavedDecodedSamples()) {
l->takeSavedDecodedSamples(&samples, &samplesCount);
}
while (samples.size() < AudioVoiceMsgBufferSize) {
auto res = l->readMore(samples, samplesCount);
using Result = AudioPlayerLoader::ReadResult;
if (res == Result::Error) {
if (errAtStart) {
{
QMutexLocker lock(internal::audioPlayerMutex());
if (auto track = checkLoader(type)) {
track->state.state = State::StoppedAtStart;
}
}
emitError(type);
return;
}
finished = true;
break;
} else if (res == Result::EndOfFile) {
finished = true;
break;
} else if (res == Result::Ok) {
errAtStart = false;
} else if (res == Result::Wait) {
waiting = (samples.size() < AudioVoiceMsgBufferSize);
if (waiting) {
l->saveDecodedSamples(&samples, &samplesCount);
}
break;
}
QMutexLocker lock(internal::audioPlayerMutex());
if (!checkLoader(type)) {
clear(type);
return;
}
}
QMutexLocker lock(internal::audioPlayerMutex());
auto track = checkLoader(type);
if (!track) {
clear(type);
return;
}
if (started) {
Audio::AttachToDevice();
track->started();
if (!internal::audioCheckError()) {
setStoppedState(track, State::StoppedAtStart);
emitError(type);
return;
}
track->bufferedPosition = position;
track->state.position = position;
track->fadeStartPosition = position;
track->format = l->format();
track->frequency = l->samplesFrequency();
}
if (samplesCount) {
track->ensureStreamCreated();
auto bufferIndex = track->getNotQueuedBufferIndex();
if (!internal::audioCheckError()) {
setStoppedState(track, State::StoppedAtError);
emitError(type);
return;
}
if (bufferIndex < 0) { // No free buffers, wait.
l->saveDecodedSamples(&samples, &samplesCount);
return;
}
track->bufferSamples[bufferIndex] = samples;
track->samplesCount[bufferIndex] = samplesCount;
track->bufferedLength += samplesCount;
alBufferData(track->stream.buffers[bufferIndex], track->format, samples.constData(), samples.size(), track->frequency);
alSourceQueueBuffers(track->stream.source, 1, track->stream.buffers + bufferIndex);
if (!internal::audioCheckError()) {
setStoppedState(track, State::StoppedAtError);
emitError(type);
return;
}
} else {
if (waiting) {
return;
}
finished = true;
}
if (finished) {
track->loaded = true;
track->state.length = track->bufferedPosition + track->bufferedLength;
clear(type);
}
track->loading = false;
if (track->state.state == State::Resuming || track->state.state == State::Playing || track->state.state == State::Starting) {
ALint state = AL_INITIAL;
alGetSourcei(track->stream.source, AL_SOURCE_STATE, &state);
if (internal::audioCheckError()) {
if (state != AL_PLAYING) {
if (state == AL_STOPPED && !internal::CheckAudioDeviceConnected()) {
return;
}
alSourcef(track->stream.source, AL_GAIN, ComputeVolume(type));
if (!internal::audioCheckError()) {
setStoppedState(track, State::StoppedAtError);
emitError(type);
return;
}
alSourcePlay(track->stream.source);
if (!internal::audioCheckError()) {
setStoppedState(track, State::StoppedAtError);
emitError(type);
return;
}
emit needToCheck();
}
} else {
setStoppedState(track, State::StoppedAtError);
emitError(type);
}
}
}
AudioPlayerLoader *Loaders::setupLoader(const AudioMsgId &audio, SetupError &err, qint64 &position) {
err = SetupErrorAtStart;
QMutexLocker lock(internal::audioPlayerMutex());
if (!mixer()) return nullptr;
auto track = mixer()->trackForType(audio.type());
if (!track || track->state.id != audio || !track->loading) {
emit error(audio);
LOG(("Audio Error: trying to load part of audio, that is not current at the moment"));
err = SetupErrorNotPlaying;
return nullptr;
}
bool isGoodId = false;
AudioPlayerLoader *l = nullptr;
switch (audio.type()) {
case AudioMsgId::Type::Voice: l = _audioLoader.get(); isGoodId = (_audio == audio); break;
case AudioMsgId::Type::Song: l = _songLoader.get(); isGoodId = (_song == audio); break;
case AudioMsgId::Type::Video: l = _videoLoader.get(); isGoodId = (_video == audio); break;
}
if (l && (!isGoodId || !l->check(track->file, track->data))) {
clear(audio.type());
l = nullptr;
}
if (!l) {
std::unique_ptr<AudioPlayerLoader> *loader = nullptr;
switch (audio.type()) {
case AudioMsgId::Type::Voice: _audio = audio; loader = &_audioLoader; break;
case AudioMsgId::Type::Song: _song = audio; loader = &_songLoader; break;
case AudioMsgId::Type::Video: _video = audio; loader = &_videoLoader; break;
}
if (audio.playId()) {
if (!track->videoData) {
clear(audio.type());
track->state.state = State::StoppedAtError;
emit error(audio);
LOG(("Audio Error: video sound data not ready"));
return nullptr;
}
*loader = std::make_unique<ChildFFMpegLoader>(std::move(track->videoData));
} else {
*loader = std::make_unique<FFMpegLoader>(track->file, track->data, base::byte_vector());
}
l = loader->get();
if (!l->open(position)) {
track->state.state = State::StoppedAtStart;
return nullptr;
}
auto length = l->samplesCount();
if (length <= 0) {
track->state.state = State::StoppedAtStart;
return nullptr;
}
track->state.length = length;
track->state.frequency = l->samplesFrequency();
if (!track->state.frequency) track->state.frequency = kDefaultFrequency;
err = SetupNoErrorStarted;
} else if (track->loaded) {
err = SetupErrorLoadedFull;
LOG(("Audio Error: trying to load part of audio, that is already loaded to the end"));
return nullptr;
}
return l;
}
Mixer::Track *Loaders::checkLoader(AudioMsgId::Type type) {
if (!mixer()) return nullptr;
auto track = mixer()->trackForType(type);
auto isGoodId = false;
AudioPlayerLoader *l = nullptr;
switch (type) {
case AudioMsgId::Type::Voice: l = _audioLoader.get(); isGoodId = (track->state.id == _audio); break;
case AudioMsgId::Type::Song: l = _songLoader.get(); isGoodId = (track->state.id == _song); break;
case AudioMsgId::Type::Video: l = _videoLoader.get(); isGoodId = (track->state.id == _video); break;
}
if (!l || !track) return nullptr;
if (!isGoodId || !track->loading || !l->check(track->file, track->data)) {
LOG(("Audio Error: playing changed while loading"));
return nullptr;
}
return track;
}
void Loaders::onCancel(const AudioMsgId &audio) {
switch (audio.type()) {
case AudioMsgId::Type::Voice: if (_audio == audio) clear(audio.type()); break;
case AudioMsgId::Type::Song: if (_song == audio) clear(audio.type()); break;
case AudioMsgId::Type::Video: if (_video == audio) clear(audio.type()); break;
}
QMutexLocker lock(internal::audioPlayerMutex());
if (!mixer()) return;
for (auto i = 0; i != kTogetherLimit; ++i) {
auto track = mixer()->trackForType(audio.type(), i);
if (track->state.id == audio) {
track->loading = false;
}
}
}
} // namespace Player
} // namespace Media