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/**********************************************************************
Audacity: A Digital Audio Editor
AVFormatContextWrapper.cpp
Dmitry Vedenko
**********************************************************************/
#include "AVFormatContextWrapper.h"
#include "FFmpegFunctions.h"
#include "AVInputFormatWrapper.h"
#include "AVOutputFormatWrapper.h"
#include "AVStreamWrapper.h"
AVFormatContextWrapper::AVFormatContextWrapper(const FFmpegFunctions& ffmpeg) noexcept
: mFFmpeg(ffmpeg)
{
}
AVFormatContext* AVFormatContextWrapper::GetWrappedValue() noexcept
{
return mAVFormatContext;
}
const AVFormatContext* AVFormatContextWrapper::GetWrappedValue() const noexcept
{
return mAVFormatContext;
}
AVFormatContextWrapper::~AVFormatContextWrapper()
{
if (mAVFormatContext != nullptr)
mFFmpeg.avformat_free_context(mAVFormatContext);
}
AVIOContextWrapper::OpenResult AVFormatContextWrapper::OpenInputContext(
const wxString& path,
const AVInputFormatWrapper* inputFormat,
AVDictionaryWrapper options
)
{
auto ioContext = mFFmpeg.CreateAVIOContext();
const auto result = ioContext->Open(path, false);
if (result != AVIOContextWrapper::OpenResult::Success)
return result;
SetAVIOContext(std::move(ioContext));
AVDictionary* dict = options.Release();
/*
Documentation for the last argument:
"A dictionary filled with AVFormatContext and demuxer-private options.
On return this parameter will be destroyed and replaced with a
dict containing options that were not found.
May be NULL."
*/
int rc = (mFFmpeg.avformat_open_input(
&mAVFormatContext, path.c_str(),
inputFormat != nullptr ? inputFormat->GetWrappedValue() : nullptr,
&dict));
// Don't leak the replacement dictionary
AVDictionaryWrapper cleanup{ mFFmpeg, dict };
if (rc)
{
return AVIOContextWrapper::OpenResult::InternalError;
}
if (mFFmpeg.avformat_find_stream_info(mAVFormatContext, nullptr) < 0)
return AVIOContextWrapper::OpenResult::InternalError;
UpdateStreamList();
mInputFormat = mFFmpeg.CreateAVInputFormatWrapper(GetIFormat());
return result;
}
AVIOContextWrapper::OpenResult
AVFormatContextWrapper::OpenOutputContext(const wxString& path)
{
auto ioContext = mFFmpeg.CreateAVIOContext();
const auto result = ioContext->Open(path, true);
if (result != AVIOContextWrapper::OpenResult::Success)
return result;
SetAVIOContext(std::move(ioContext));
return result;
}
std::unique_ptr<AVPacketWrapper> AVFormatContextWrapper::ReadNextPacket()
{
std::unique_ptr<AVPacketWrapper> packet = mFFmpeg.CreateAVPacketWrapper();
if (mFFmpeg.av_read_frame(mAVFormatContext, packet->GetWrappedValue()) < 0)
return {};
return packet;
}
std::unique_ptr<AVStreamWrapper> AVFormatContextWrapper::CreateStream()
{
// The complementary deallocation happens in avformat_free_context
AVStream* stream = mFFmpeg.avformat_new_stream(mAVFormatContext, nullptr);
if (stream == nullptr)
return {};
UpdateStreamList();
return mFFmpeg.CreateAVStreamWrapper(stream, true);
}
const AVInputFormatWrapper*
AVFormatContextWrapper::GetInputFormat() const noexcept
{
return mInputFormat.get();
}
const AVOutputFormatWrapper*
AVFormatContextWrapper::GetOutputFormat() const noexcept
{
return mOutputFormat.get();
}
const AVStreamWrapper*
AVFormatContextWrapper::GetStream(int index) const noexcept
{
if (index < GetStreamsCount())
return GetStreams()[index].get();
return nullptr;
}
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