136 lines
3.5 KiB
C++
136 lines
3.5 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop 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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It 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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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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#include "media/media_audio_loader.h"
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extern "C" {
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libavutil/opt.h>
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#include <libswresample/swresample.h>
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} // extern "C"
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#include <AL/al.h>
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struct VideoSoundData {
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AVCodecContext *context = nullptr;
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int32 frequency = AudioVoiceMsgFrequency;
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int64 length = 0;
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~VideoSoundData();
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};
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struct VideoSoundPart {
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AVPacket *packet = nullptr;
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uint64 videoPlayId = 0;
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};
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namespace FFMpeg {
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// AVPacket has a deprecated field, so when you copy an AVPacket
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// variable (e.g. inside QQueue), a compile warning is emited.
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// We wrap full AVPacket data in a new AVPacketDataWrap struct.
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// All other fields are copied from AVPacket without modifications.
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struct AVPacketDataWrap {
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char __data[sizeof(AVPacket)];
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};
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inline void packetFromDataWrap(AVPacket &packet, const AVPacketDataWrap &data) {
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memcpy(&packet, &data, sizeof(data));
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}
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inline AVPacketDataWrap dataWrapFromPacket(const AVPacket &packet) {
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AVPacketDataWrap data;
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memcpy(&data, &packet, sizeof(data));
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return data;
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}
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inline bool isNullPacket(const AVPacket &packet) {
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return packet.data == nullptr && packet.size == 0;
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}
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inline bool isNullPacket(const AVPacket *packet) {
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return isNullPacket(*packet);
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}
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inline void freePacket(AVPacket *packet) {
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if (!isNullPacket(packet)) {
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av_packet_unref(packet);
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}
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}
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} // namespace FFMpeg
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class ChildFFMpegLoader : public AudioPlayerLoader {
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public:
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ChildFFMpegLoader(uint64 videoPlayId, std_::unique_ptr<VideoSoundData> &&data);
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bool open(qint64 &position) override;
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bool check(const FileLocation &file, const QByteArray &data) override {
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return true;
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}
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int32 format() override {
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return _format;
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}
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int64 duration() override {
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return _parentData->length;
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}
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int32 frequency() override {
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return _parentData->frequency;
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}
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ReadResult readMore(QByteArray &result, int64 &samplesAdded) override;
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void enqueuePackets(QQueue<FFMpeg::AVPacketDataWrap> &packets);
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uint64 playId() const {
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return _videoPlayId;
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}
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bool eofReached() const {
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return _eofReached;
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}
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~ChildFFMpegLoader();
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private:
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ReadResult readFromReadyFrame(QByteArray &result, int64 &samplesAdded);
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bool _eofReached = false;
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int32 _sampleSize = 2 * sizeof(uint16);
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int32 _format = AL_FORMAT_STEREO16;
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int32 _srcRate = AudioVoiceMsgFrequency;
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int32 _dstRate = AudioVoiceMsgFrequency;
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int32 _maxResampleSamples = 1024;
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uint8_t **_dstSamplesData = nullptr;
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uint64 _videoPlayId = 0;
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std_::unique_ptr<VideoSoundData> _parentData;
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AVSampleFormat _inputFormat;
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AVFrame *_frame = nullptr;
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SwrContext *_swrContext = nullptr;
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QQueue<FFMpeg::AVPacketDataWrap> _queue;
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};
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