mirror of
https://github.com/vale981/tdesktop
synced 2025-03-08 19:21:39 -05:00
95399bef2b
It looks like different AVFrame-s can have different audio encoding parameters, so now we setup/re-setup swr context using parameters from current audio frame. Hopefully it will fix some audio crashes.
139 lines
3.6 KiB
C++
139 lines
3.6 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) 2014-2017 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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#include "media/media_audio.h"
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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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class AbstractFFMpegLoader : public AudioPlayerLoader {
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public:
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AbstractFFMpegLoader(
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const FileLocation &file,
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const QByteArray &data,
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base::byte_vector &&bytes)
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: AudioPlayerLoader(file, data, std::move(bytes)) {
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}
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bool open(TimeMs positionMs) override;
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int64 samplesCount() override {
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return _samplesCount;
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}
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int samplesFrequency() override {
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return _samplesFrequency;
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}
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static uint64_t ComputeChannelLayout(
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uint64_t channel_layout,
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int channels);
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~AbstractFFMpegLoader();
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protected:
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static int64 Mul(int64 value, AVRational rational);
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int _samplesFrequency = Media::Player::kDefaultFrequency;
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int64 _samplesCount = 0;
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uchar *ioBuffer = nullptr;
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AVIOContext *ioContext = nullptr;
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AVFormatContext *fmtContext = nullptr;
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AVCodec *codec = nullptr;
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int32 streamId = 0;
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bool _opened = false;
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private:
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static int _read_data(void *opaque, uint8_t *buf, int buf_size);
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static int64_t _seek_data(void *opaque, int64_t offset, int whence);
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static int _read_bytes(void *opaque, uint8_t *buf, int buf_size);
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static int64_t _seek_bytes(void *opaque, int64_t offset, int whence);
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static int _read_file(void *opaque, uint8_t *buf, int buf_size);
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static int64_t _seek_file(void *opaque, int64_t offset, int whence);
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};
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class FFMpegLoader : public AbstractFFMpegLoader {
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public:
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FFMpegLoader(
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const FileLocation &file,
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const QByteArray &data,
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base::byte_vector &&bytes);
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bool open(TimeMs positionMs) override;
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int64 samplesCount() override {
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return _swrDstSamplesCount;
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}
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int samplesFrequency() override {
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return _swrDstRate;
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}
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int format() override {
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return _format;
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}
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ReadResult readMore(QByteArray &result, int64 &samplesAdded) override;
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~FFMpegLoader();
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protected:
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int sampleSize = 2 * sizeof(uint16);
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private:
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ReadResult readFromReadyFrame(QByteArray &result, int64 &samplesAdded);
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bool frameHasDesiredFormat() const;
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bool initResampleForFrame();
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bool initResampleUsingFormat();
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bool ensureResampleSpaceAvailable(int samples);
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AVCodecContext *_codecContext = nullptr;
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AVPacket _packet;
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int _format = AL_FORMAT_STEREO16;
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AVFrame *_frame = nullptr;
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SwrContext *_swrContext = nullptr;
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int _swrSrcRate = 0;
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AVSampleFormat _swrSrcFormat = AV_SAMPLE_FMT_NONE;
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uint64_t _swrSrcChannelLayout = 0;
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const int _swrDstRate = Media::Player::kDefaultFrequency;
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AVSampleFormat _swrDstFormat = AV_SAMPLE_FMT_S16;
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uint64_t _swrDstChannelLayout = AV_CH_LAYOUT_STEREO;
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int _swrDstChannels = 2;
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int64 _swrDstSamplesCount = 0;
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uint8_t **_swrDstData = nullptr;
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int _swrDstDataCapacity = 0;
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};
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