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#pragma once
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswresample/swresample.h>
} // extern "C"
#include "sources/readaheadframebuffer.h"
#include "sources/soundsourceprovider.h"
namespace mixxx {
class SoundSourceFFmpeg : public SoundSource {
public:
explicit SoundSourceFFmpeg(const QUrl& url);
~SoundSourceFFmpeg() override;
void close() override;
protected:
ReadableSampleFrames readSampleFramesClamped(
const WritableSampleFrames& sampleFrames) override;
private:
OpenResult tryOpen(
OpenMode mode,
const OpenParams& params) override;
bool initResampling(
audio::ChannelCount* pResampledChannelCount,
audio::SampleRate* pResampledSampleRate);
const CSAMPLE* resampleDecodedAVFrame();
// Seek to the requested start index (if needed) or return false
// upon seek errors.
bool adjustCurrentPosition(
SINT startIndex);
bool consumeNextAVPacket(
AVPacket** ppavNextPacket);
// Takes ownership of an input format context and ensures that
// the corresponding AVFormatContext is closed, either explicitly
// or implicitly by the destructor. The wrapper can only be
// moved, copying is disabled.
class InputAVFormatContextPtr final {
public:
explicit InputAVFormatContextPtr(AVFormatContext* pavInputFormatContext = nullptr)
: m_pavInputFormatContext(pavInputFormatContext) {
}
InputAVFormatContextPtr(const InputAVFormatContextPtr&) = delete;
InputAVFormatContextPtr(InputAVFormatContextPtr&& that)
: m_pavInputFormatContext(that.m_pavInputFormatContext) {
that.m_pavInputFormatContext = nullptr;
}
~InputAVFormatContextPtr() {
close();
}
void take(AVFormatContext** ppavInputFormatContext);
void close();
friend void swap(InputAVFormatContextPtr& lhs, InputAVFormatContextPtr& rhs) {
std::swap(lhs.m_pavInputFormatContext, rhs.m_pavInputFormatContext);
}
InputAVFormatContextPtr& operator=(const InputAVFormatContextPtr&) = delete;
InputAVFormatContextPtr& operator=(InputAVFormatContextPtr&& that) {
swap(*this, that);
return *this;
}
AVFormatContext* operator->() {
return m_pavInputFormatContext;
}
operator AVFormatContext*() {
return m_pavInputFormatContext;
}
private:
AVFormatContext* m_pavInputFormatContext;
};
InputAVFormatContextPtr m_pavInputFormatContext;
AVStream* m_pavStream;
// Takes ownership of an opened (audio) codec context and ensures that
// the corresponding AVCodecContext is closed, either explicitly or
// implicitly by the destructor. The wrapper can only be moved,
// copying is disabled.
class AVCodecContextPtr final {
public:
static AVCodecContextPtr alloc(const AVCodec* codec);
explicit AVCodecContextPtr(AVCodecContext* pavCodecContext = nullptr)
: m_pavCodecContext(pavCodecContext) {
}
AVCodecContextPtr(const AVCodecContextPtr&) = delete;
AVCodecContextPtr(AVCodecContextPtr&& that)
: m_pavCodecContext(that.m_pavCodecContext) {
that.m_pavCodecContext = nullptr;
}
~AVCodecContextPtr() {
close();
}
void take(AVCodecContext** ppavCodecContext);
void close();
friend void swap(AVCodecContextPtr& lhs, AVCodecContextPtr& rhs) {
std::swap(lhs.m_pavCodecContext, rhs.m_pavCodecContext);
}
AVCodecContextPtr& operator=(const AVCodecContextPtr&) = delete;
AVCodecContextPtr& operator=(AVCodecContextPtr&& that) {
swap(*this, that);
return *this;
}
AVCodecContext* operator->() {
return m_pavCodecContext;
}
operator AVCodecContext*() {
return m_pavCodecContext;
}
private:
AVCodecContext* m_pavCodecContext;
};
AVCodecContextPtr m_pavCodecContext;
// Resampler
class SwrContextPtr final {
public:
explicit SwrContextPtr(SwrContext* m_pSwrContext = nullptr)
: m_pSwrContext(m_pSwrContext) {
}
SwrContextPtr(const SwrContextPtr&) = delete;
SwrContextPtr(SwrContextPtr&& that)
: m_pSwrContext(that.m_pSwrContext) {
that.m_pSwrContext = nullptr;
}
~SwrContextPtr() {
close();
}
void take(SwrContext** ppSwrContext);
void close();
friend void swap(SwrContextPtr& lhs, SwrContextPtr& rhs) {
std::swap(lhs.m_pSwrContext, rhs.m_pSwrContext);
}
SwrContextPtr& operator=(const SwrContextPtr&) = delete;
SwrContextPtr& operator=(SwrContextPtr&& that) {
swap(*this, that);
return *this;
}
SwrContext* operator->() {
return m_pSwrContext;
}
operator SwrContext*() {
return m_pSwrContext;
}
private:
SwrContext* m_pSwrContext;
};
SwrContextPtr m_pSwrContext;
uint64_t m_avStreamChannelLayout;
uint64_t m_avResampledChannelLayout;
AVPacket* m_pavPacket;
AVFrame* m_pavDecodedFrame;
AVFrame* m_pavResampledFrame;
FrameCount m_seekPrerollFrameCount;
ReadAheadFrameBuffer m_frameBuffer;
};
class SoundSourceProviderFFmpeg : public SoundSourceProvider {
public:
static const QString kDisplayName;
SoundSourceProviderFFmpeg();
QString getDisplayName() const override {
return kDisplayName;
}
QStringList getSupportedFileExtensions() const override;
SoundSourceProviderPriority getPriorityHint(
const QString& supportedFileExtension) const override;
SoundSourcePointer newSoundSource(const QUrl& url) override {
return newSoundSourceFromUrl<SoundSourceFFmpeg>(url);
}
};
} // namespace mixxx
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