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audacity/src/FFmpeg.cpp

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/**********************************************************************
Audacity: A Digital Audio Editor
FFmpeg.cpp
Audacity(R) is copyright (c) 1999-2009 Audacity Team.
License: GPL v2. See License.txt.
******************************************************************//**
\class FFmpegLibs
\brief Class used to dynamically load FFmpeg libraries
*//*******************************************************************/
// Store function pointers here when including FFmpeg.h
#define DEFINE_FFMPEG_POINTERS
#include "Audacity.h" // for config*.h // for USE_* macros
#include "FFmpeg.h"
#include "FileNames.h"
#include "widgets/HelpSystem.h"
#include "widgets/AudacityMessageBox.h"
#include <wx/checkbox.h>
#include <wx/dynlib.h>
#include <wx/file.h>
#include <wx/filedlg.h>
#include <wx/log.h>
#include <wx/textctrl.h>
#if !defined(USE_FFMPEG)
/// FFmpeg support may or may not be compiled in,
/// but Preferences dialog requires this function nevertheless
wxString GetFFmpegVersion(wxWindow *parent)
{
return wxString(_("FFmpeg support not compiled in"));
}
#else
/** This pointer to the shared object has global scope and is used to track the
* singleton object which wraps the FFmpeg codecs */
std::unique_ptr<FFmpegLibs> FFmpegLibsPtr{};
FFmpegLibs *FFmpegLibsInst()
{
return FFmpegLibsPtr.get();
}
FFmpegLibs *PickFFmpegLibs()
{
if (FFmpegLibsPtr)
FFmpegLibsPtr->refcount++;
else
FFmpegLibsPtr = std::make_unique<FFmpegLibs>();
return FFmpegLibsPtr.get();
}
void DropFFmpegLibs()
{
if (FFmpegLibsPtr)
{
FFmpegLibsPtr->refcount--;
if (FFmpegLibsPtr->refcount == 0)
FFmpegLibsPtr.reset();
}
}
bool LoadFFmpeg(bool showerror)
{
PickFFmpegLibs();
if (FFmpegLibsInst()->ValidLibsLoaded())
{
DropFFmpegLibs();
return true;
}
if (!FFmpegLibsInst()->LoadLibs(NULL, showerror))
{
DropFFmpegLibs();
gPrefs->Write(wxT("/FFmpeg/Enabled"), false);
gPrefs->Flush();
return false;
}
else
{
gPrefs->Write(wxT("/FFmpeg/Enabled"), true);
gPrefs->Flush();
return true;
}
}
/** Called during Audacity start-up to try and load the ffmpeg libraries */
void FFmpegStartup()
{
bool enabled = false;
gPrefs->Read(wxT("/FFmpeg/Enabled"),&enabled);
// 'false' means that no errors should be shown whatsoever
if (!LoadFFmpeg(false))
{
if (enabled)
{
AudacityMessageBox(XO(
"FFmpeg was configured in Preferences and successfully loaded before, \
\nbut this time Audacity failed to load it at startup. \
\n\nYou may want to go back to Preferences > Libraries and re-configure it."),
XO("FFmpeg startup failed"));
}
}
}
wxString GetFFmpegVersion(wxWindow * WXUNUSED(parent))
{
PickFFmpegLibs();
wxString versionString = _("FFmpeg library not found");
if (FFmpegLibsInst()->ValidLibsLoaded()) {
versionString = FFmpegLibsInst()->GetLibraryVersion();
}
DropFFmpegLibs();
return versionString;
}
void av_log_wx_callback(void* ptr, int level, const char* fmt, va_list vl)
{
//Most of this stuff is taken from FFmpeg tutorials and FFmpeg itself
int av_log_level = AV_LOG_INFO;
AVClass* avc = ptr ? *(AVClass**)ptr : NULL;
if (level > av_log_level)
return;
wxString printstring(wxT(""));
if (avc) {
printstring.Append(wxString::Format(wxT("[%s @ %p] "), wxString::FromUTF8(avc->item_name(ptr)), avc));
}
wxString frm(fmt,wxConvLibc);
printstring.Append(wxString::FormatV(frm,vl));
wxString cpt;
switch (level)
{
case 0: cpt = wxT("Error"); break;
case 1: cpt = wxT("Info"); break;
case 2: cpt = wxT("Debug"); break;
default: cpt = wxT("Log"); break;
}
wxLogDebug(wxT("%s: %s"),cpt,printstring);
}
//======================= Unicode aware uri protocol for FFmpeg
// Code inspired from ffmpeg-users mailing list sample
static int ufile_read(void *opaque, uint8_t *buf, int size)
{
int ret = (int)((wxFile *) opaque)->Read(buf, size);
return ret;
}
static int ufile_write(void *opaque, uint8_t *buf, int size)
{
auto bytes = (int) ((wxFile *) opaque)->Write(buf, size);
if (bytes != size)
return -ENOSPC;
return bytes;
}
static int64_t ufile_seek(void *opaque, int64_t pos, int whence)
{
wxSeekMode mode = wxFromStart;
#if !defined(AVSEEK_FORCE)
#define AVSEEK_FORCE 0
#endif
switch (whence & ~AVSEEK_FORCE)
{
case (SEEK_SET):
mode = wxFromStart;
break;
case (SEEK_CUR):
mode = wxFromCurrent;
break;
case (SEEK_END):
mode = wxFromEnd;
break;
case (AVSEEK_SIZE):
return ((wxFile *) opaque)->Length();
}
return ((wxFile *) opaque)->Seek(pos, mode);
}
int ufile_close(AVIOContext *pb)
{
std::unique_ptr<wxFile> f{ (wxFile *)pb->opaque };
bool success = true;
if (f) {
success = f->Flush() && f->Close();
pb->opaque = nullptr;
}
// We're not certain that a close error is for want of space, but we'll
// guess that
return success ? 0 : -ENOSPC;
// Implicitly destroy the wxFile object here
}
// Open a file with a (possibly) Unicode filename
int ufile_fopen(AVIOContext **s, const FilePath & name, int flags)
{
wxFile::OpenMode mode;
auto f = std::make_unique<wxFile>();
if (!f) {
return -ENOMEM;
}
if (flags == (AVIO_FLAG_READ | AVIO_FLAG_WRITE)) {
return -EINVAL;
} else if (flags == AVIO_FLAG_WRITE) {
mode = wxFile::write;
} else {
mode = wxFile::read;
}
if (!f->Open(name, mode)) {
return -ENOENT;
}
*s = avio_alloc_context((unsigned char*)av_malloc(32768), 32768,
flags & AVIO_FLAG_WRITE,
/*opaque*/f.get(),
ufile_read,
ufile_write,
ufile_seek);
if (!*s) {
return -ENOMEM;
}
f.release(); // s owns the file object now
return 0;
}
// Detect type of input file and open it if recognized. Routine
// based on the av_open_input_file() libavformat function.
int ufile_fopen_input(std::unique_ptr<FFmpegContext> &context_ptr, FilePath & name)
{
context_ptr.reset();
auto context = std::make_unique<FFmpegContext>();
wxFileName ff{ name };
wxCharBuffer fname;
const char *filename;
int err;
fname = ff.GetFullName().mb_str();
filename = (const char *) fname;
// Open the file to prepare for probing
if ((err = ufile_fopen(&context->pb, name, AVIO_FLAG_READ)) < 0) {
goto fail;
}
context->ic_ptr = avformat_alloc_context();
context->ic_ptr->pb = context->pb;
// And finally, attempt to associate an input stream with the file
err = avformat_open_input(&context->ic_ptr, filename, NULL, NULL);
if (err) {
goto fail;
}
// success
context_ptr = std::move(context);
return 0;
fail:
return err;
}
FFmpegContext::~FFmpegContext()
{
if (FFmpegLibsInst()->ValidLibsLoaded())
{
if (ic_ptr)
avformat_close_input(&ic_ptr);
av_log_set_callback(av_log_default_callback);
}
if (pb) {
ufile_close(pb);
if (FFmpegLibsInst()->ValidLibsLoaded())
{
av_free(pb->buffer);
av_free(pb);
}
}
}
streamContext *import_ffmpeg_read_next_frame(AVFormatContext* formatContext,
streamContext** streams,
unsigned int numStreams)
{
streamContext *sc = NULL;
AVPacketEx pkt;
if (av_read_frame(formatContext, &pkt) < 0)
{
return NULL;
}
// Find a stream to which this frame belongs
for (unsigned int i = 0; i < numStreams; i++)
{
if (streams[i]->m_stream->index == pkt.stream_index)
sc = streams[i];
}
// Off-stream packet. Don't panic, just skip it.
// When not all streams are selected for import this will happen very often.
if (sc == NULL)
{
return (streamContext*)1;
}
// Copy the frame to the stream context
sc->m_pkt.emplace(std::move(pkt));
sc->m_pktDataPtr = sc->m_pkt->data;
sc->m_pktRemainingSiz = sc->m_pkt->size;
return sc;
}
int import_ffmpeg_decode_frame(streamContext *sc, bool flushing)
{
int nBytesDecoded;
wxUint8 *pDecode = sc->m_pktDataPtr;
int nDecodeSiz = sc->m_pktRemainingSiz;
sc->m_frameValid = 0;
if (flushing)
{
// If we're flushing the decoders we don't actually have any NEW data to decode.
pDecode = NULL;
nDecodeSiz = 0;
}
else
{
if (!sc->m_pkt || (sc->m_pktRemainingSiz <= 0))
{
//No more data
return -1;
}
}
AVPacketEx avpkt;
avpkt.data = pDecode;
avpkt.size = nDecodeSiz;
AVFrameHolder frame{ av_frame_alloc() };
int got_output = 0;
nBytesDecoded =
avcodec_decode_audio4(sc->m_codecCtx,
frame.get(), // out
&got_output, // out
&avpkt); // in
if (nBytesDecoded < 0)
{
// Decoding failed. Don't stop.
return -1;
}
sc->m_samplefmt = sc->m_codecCtx->sample_fmt;
sc->m_samplesize = static_cast<size_t>(av_get_bytes_per_sample(sc->m_samplefmt));
int channels = sc->m_codecCtx->channels;
auto newsize = sc->m_samplesize * frame->nb_samples * channels;
sc->m_decodedAudioSamplesValidSiz = newsize;
// Reallocate the audio sample buffer if it's smaller than the frame size.
if (newsize > sc->m_decodedAudioSamplesSiz )
{
// Reallocate a bigger buffer. But av_realloc is NOT compatible with the returns of av_malloc!
// So do this:
sc->m_decodedAudioSamples.reset(static_cast<uint8_t *>(av_malloc(newsize)));
sc->m_decodedAudioSamplesSiz = newsize;
if (!sc->m_decodedAudioSamples)
{
//Can't allocate bytes
return -1;
}
}
if (frame->data[1]) {
for (int i = 0; i<frame->nb_samples; i++) {
for (int ch = 0; ch<channels; ch++) {
memcpy(sc->m_decodedAudioSamples.get() + sc->m_samplesize * (ch + channels*i),
frame->extended_data[ch] + sc->m_samplesize*i,
sc->m_samplesize);
}
}
} else {
memcpy(sc->m_decodedAudioSamples.get(), frame->data[0], newsize);
}
// We may not have read all of the data from this packet. If so, the user can call again.
// Whether or not they do depends on if m_pktRemainingSiz == 0 (they can check).
sc->m_pktDataPtr += nBytesDecoded;
sc->m_pktRemainingSiz -= nBytesDecoded;
// At this point it's normally safe to assume that we've read some samples. However, the MPEG
// audio decoder is broken. If this is the case then we just return with m_frameValid == 0
// but m_pktRemainingSiz perhaps != 0, so the user can call again.
if (sc->m_decodedAudioSamplesValidSiz > 0)
{
sc->m_frameValid = 1;
}
return 0;
}
/*******************************************************/
class FFmpegNotFoundDialog;
//----------------------------------------------------------------------------
// FindFFmpegDialog
//----------------------------------------------------------------------------
#define ID_FFMPEG_BROWSE 5000
#define ID_FFMPEG_DLOAD 5001
/// Allows user to locate libav* libraries
class FindFFmpegDialog final : public wxDialogWrapper
{
public:
FindFFmpegDialog(wxWindow *parent, const wxString &path, const wxString &name,
FileNames::FileTypes types)
: wxDialogWrapper(parent, wxID_ANY, XO("Locate FFmpeg"))
{
SetName();
ShuttleGui S(this, eIsCreating);
mPath = path;
mName = name;
mTypes = std::move( types );
mLibPath.Assign(mPath, mName);
PopulateOrExchange(S);
}
void PopulateOrExchange(ShuttleGui & S)
{
S.SetBorder(10);
S.StartVerticalLay(true);
{
S.AddTitle(
XO(
"Audacity needs the file '%s' to import and export audio via FFmpeg.")
.Format( mName ) );
S.SetBorder(3);
S.StartHorizontalLay(wxALIGN_LEFT, true);
{
S.AddTitle( XO("Location of '%s':").Format( mName ) );
}
S.EndHorizontalLay();
S.StartMultiColumn(2, wxEXPAND);
S.SetStretchyCol(0);
{
if (mLibPath.GetFullPath().empty()) {
mPathText = S.AddTextBox( {},
wxString::Format(_("To find '%s', click here -->"), mName), 0);
}
else {
mPathText = S.AddTextBox( {}, mLibPath.GetFullPath(), 0);
}
S.Id(ID_FFMPEG_BROWSE).AddButton(XO("Browse..."), wxALIGN_RIGHT);
S.AddVariableText(
XO("To get a free copy of FFmpeg, click here -->"), true);
S.Id(ID_FFMPEG_DLOAD).AddButton(XO("Download"), wxALIGN_RIGHT);
}
S.EndMultiColumn();
S.AddStandardButtons();
}
S.EndVerticalLay();
Layout();
Fit();
SetMinSize(GetSize());
Center();
return;
}
void OnBrowse(wxCommandEvent & WXUNUSED(event))
{
/* i18n-hint: It's asking for the location of a file, for
example, "Where is lame_enc.dll?" - you could translate
"Where would I find the file '%s'?" instead if you want. */
auto question = XO("Where is '%s'?").Format( mName );
wxString path = FileNames::SelectFile(FileNames::Operation::_None,
question,
mLibPath.GetPath(),
mLibPath.GetName(),
wxT(""),
mTypes,
wxFD_OPEN | wxRESIZE_BORDER,
this);
if (!path.empty()) {
mLibPath = path;
mPathText->SetValue(path);
}
}
void OnDownload(wxCommandEvent & WXUNUSED(event))
{
HelpSystem::ShowHelp(this, wxT("FAQ:Installing_the_FFmpeg_Import_Export_Library"));
}
wxString GetLibPath()
{
return mLibPath.GetFullPath();
}
private:
wxFileName mLibPath;
wxString mPath;
wxString mName;
FileNames::FileTypes mTypes;
wxTextCtrl *mPathText;
DECLARE_EVENT_TABLE()
};
BEGIN_EVENT_TABLE(FindFFmpegDialog, wxDialogWrapper)
EVT_BUTTON(ID_FFMPEG_BROWSE, FindFFmpegDialog::OnBrowse)
EVT_BUTTON(ID_FFMPEG_DLOAD, FindFFmpegDialog::OnDownload)
END_EVENT_TABLE()
//----------------------------------------------------------------------------
// FFmpegNotFoundDialog
//----------------------------------------------------------------------------
FFmpegNotFoundDialog::FFmpegNotFoundDialog(wxWindow *parent)
: wxDialogWrapper(parent, wxID_ANY, XO("FFmpeg not found"))
{
SetName();
ShuttleGui S(this, eIsCreating);
PopulateOrExchange(S);
}
void FFmpegNotFoundDialog::PopulateOrExchange(ShuttleGui & S)
{
wxString text;
S.SetBorder(10);
S.StartVerticalLay(true);
{
S.AddFixedText(XO(
"Audacity attempted to use FFmpeg to import an audio file,\n\
but the libraries were not found.\n\n\
To use FFmpeg import, go to Edit > Preferences > Libraries\n\
to download or locate the FFmpeg libraries."
));
mDontShow = S
.AddCheckBox(XO("Do not show this warning again"),
gPrefs->ReadBool(wxT("/FFmpeg/NotFoundDontShow"), false) );
S.AddStandardButtons(eOkButton);
}
S.EndVerticalLay();
Layout();
Fit();
SetMinSize(GetSize());
Center();
return;
}
void FFmpegNotFoundDialog::OnOk(wxCommandEvent & WXUNUSED(event))
{
if (mDontShow->GetValue())
{
gPrefs->Write(wxT("/FFmpeg/NotFoundDontShow"),1);
gPrefs->Flush();
}
this->EndModal(0);
}
BEGIN_EVENT_TABLE(FFmpegNotFoundDialog, wxDialogWrapper)
EVT_BUTTON(wxID_OK, FFmpegNotFoundDialog::OnOk)
END_EVENT_TABLE()
//----------------------------------------------------------------------------
// FFmpegLibs
//----------------------------------------------------------------------------
FFmpegLibs::FFmpegLibs()
{
mLibsLoaded = false;
refcount = 1;
if (gPrefs) {
mLibAVFormatPath = gPrefs->Read(wxT("/FFmpeg/FFmpegLibPath"), wxT(""));
}
}
FFmpegLibs::~FFmpegLibs()
{
FreeLibs();
};
bool FFmpegLibs::FindLibs(wxWindow *parent)
{
wxString path;
wxString name;
// If we're looking for the lib, use the standard name, as the
// configured name is not found.
name = GetLibAVFormatName();
wxLogMessage(wxT("Looking for FFmpeg libraries..."));
if (!mLibAVFormatPath.empty()) {
wxLogMessage(wxT("mLibAVFormatPath ('%s') is not empty."), mLibAVFormatPath);
const wxFileName fn{ mLibAVFormatPath };
path = fn.GetPath();
}
else {
path = GetLibAVFormatPath();
wxLogMessage(wxT("mLibAVFormatPath is empty, starting with path '%s', name '%s'."),
path, name);
}
FindFFmpegDialog fd(parent,
path,
name,
GetLibraryTypes());
if (fd.ShowModal() == wxID_CANCEL) {
wxLogMessage(wxT("User canceled the dialog. Failed to find FFmpeg libraries."));
return false;
}
path = fd.GetLibPath();
wxLogMessage(wxT("User-specified path = '%s'"), path);
if (!::wxFileExists(path)) {
wxLogError(wxT("User-specified file does not exist. Failed to find FFmpeg libraries."));
return false;
}
wxLogMessage(wxT("User-specified FFmpeg file exists. Success."));
mLibAVFormatPath = path;
gPrefs->Write(wxT("/FFmpeg/FFmpegLibPath"), mLibAVFormatPath);
gPrefs->Flush();
return true;
}
bool FFmpegLibs::LoadLibs(wxWindow * WXUNUSED(parent), bool showerr)
{
#if defined(DISABLE_DYNAMIC_LOADING_FFMPEG)
mLibsLoaded = InitLibs(wxEmptyString, showerr);
return mLibsLoaded;
#endif
wxLogMessage(wxT("Trying to load FFmpeg libraries..."));
if (ValidLibsLoaded()) {
wxLogMessage(wxT("FFmpeg libraries are already loaded."));
FreeLibs();
}
// First try loading it from a previously located path
if (!mLibAVFormatPath.empty()) {
wxLogMessage(wxT("mLibAVFormatPath ('%s') is not empty. Loading from it."),mLibAVFormatPath);
mLibsLoaded = InitLibs(mLibAVFormatPath,showerr);
}
// If not successful, try loading it from default path
if (!mLibsLoaded && !GetLibAVFormatPath().empty()) {
const wxFileName fn{ GetLibAVFormatPath(), GetLibAVFormatName() };
wxString path = fn.GetFullPath();
wxLogMessage(wxT("Trying to load FFmpeg libraries from default path, '%s'."), path);
mLibsLoaded = InitLibs(path,showerr);
if (mLibsLoaded) {
mLibAVFormatPath = path;
}
}
#if defined(__WXMAC__)
// If not successful, try loading it from legacy path
if (!mLibsLoaded && !GetLibAVFormatPath().empty()) {
const wxFileName fn{wxT("/usr/local/lib/audacity"), GetLibAVFormatName()};
wxString path = fn.GetFullPath();
wxLogMessage(wxT("Trying to load FFmpeg libraries from legacy path, '%s'."), path);
mLibsLoaded = InitLibs(path,showerr);
if (mLibsLoaded) {
mLibAVFormatPath = path;
}
}
#endif
// If not successful, try loading using system search paths
if (!ValidLibsLoaded()) {
wxString path = GetLibAVFormatName();
wxLogMessage(wxT("Trying to load FFmpeg libraries from system paths. File name is '%s'."), path);
mLibsLoaded = InitLibs(path,showerr);
if (mLibsLoaded) {
mLibAVFormatPath = path;
}
}
// If libraries aren't loaded - nag user about that
/*
if (!ValidLibsLoaded())
{
wxLogError(wxT("Failed to load libraries altogether."));
int dontShowDlg;
gPrefs->Read(wxT("/FFmpeg/NotFoundDontShow"),&dontShowDlg,0);
if ((dontShowDlg == 0) && (showerr))
FFmpegNotFoundDialog{nullptr}.ShowModal();
}
*/
// Oh well, just give up
if (!ValidLibsLoaded()) {
auto msg = XO("Failed to find compatible FFmpeg libraries.");
if (showerr)
AudacityMessageBox( msg );
wxLogError(msg.Debug());
return false;
}
wxLogMessage(wxT("FFmpeg libraries loaded successfully."));
return true;
}
bool FFmpegLibs::ValidLibsLoaded()
{
return mLibsLoaded;
}
bool FFmpegLibs::InitLibs(const wxString &libpath_format, bool WXUNUSED(showerr))
{
#if !defined(DISABLE_DYNAMIC_LOADING_FFMPEG)
FreeLibs();
#if defined(__WXMSW__)
wxString syspath;
bool pathfix = false;
wxLogMessage(wxT("Looking up PATH environment variable..."));
// First take PATH environment variable and store its content.
if (wxGetEnv(wxT("PATH"),&syspath))
{
wxLogMessage(wxT("PATH = '%s'"), syspath);
const wxString &fmtdir{ wxPathOnly(libpath_format) };
wxString fmtdirsc = fmtdir + wxT(";");
wxString scfmtdir = wxT(";") + fmtdir;
wxLogMessage(wxT("Checking that '%s' is in PATH..."), fmtdir);
// If the directory, where libavformat is, is not in PATH - add it
if (!syspath.Contains(fmtdirsc) && !syspath.Contains(scfmtdir) && !syspath.Contains(fmtdir))
{
wxLogWarning(wxT("FFmpeg directory '%s' is not in PATH."), fmtdir);
if (syspath.Left(1) == wxT(';'))
{
wxLogMessage(wxT("Temporarily prepending '%s' to PATH..."), fmtdir);
syspath.Prepend(scfmtdir);
}
else
{
wxLogMessage(wxT("Temporarily prepending '%s' to PATH..."), scfmtdir);
syspath.Prepend(fmtdirsc);
}
if (wxSetEnv(wxT("PATH"),syspath))
// Remember to change PATH back to normal after we're done
pathfix = true;
else
wxLogSysError(wxT("Setting PATH via wxSetEnv('%s') failed."),syspath);
}
else
{
wxLogMessage(wxT("FFmpeg directory is in PATH."));
}
}
else
{
wxLogSysError(wxT("PATH does not exist."));
}
#endif
//Load libavformat
// Initially we don't know where are the avcodec and avutl libs
wxDynamicLibrary *codec = NULL;
wxDynamicLibrary *util = NULL;
wxFileName avcodec_filename;
wxFileName avutil_filename;
wxFileName name{ libpath_format };
wxString nameFull{name.GetFullPath()};
bool gotError = false;
// Check for a monolithic avformat
avformat = std::make_unique<wxDynamicLibrary>();
wxLogMessage(wxT("Checking for monolithic avformat from '%s'."), nameFull);
gotError = !avformat->Load(nameFull, wxDL_LAZY);
// Verify it really is monolithic
if (!gotError) {
avutil_filename = FileNames::PathFromAddr(avformat->GetSymbol(wxT("avutil_version")));
avcodec_filename = FileNames::PathFromAddr(avformat->GetSymbol(wxT("avcodec_version")));
if (avutil_filename.GetFullPath() == nameFull) {
if (avcodec_filename.GetFullPath() == nameFull) {
util = avformat.get();
codec = avformat.get();
}
}
if (!avcodec_filename.FileExists()) {
avcodec_filename = GetLibAVCodecName();
}
if (!avutil_filename.FileExists()) {
avutil_filename = GetLibAVUtilName();
}
if (util == NULL || codec == NULL) {
wxLogMessage(wxT("avformat not monolithic"));
avformat->Unload();
util = NULL;
codec = NULL;
}
else {
wxLogMessage(wxT("avformat is monolithic"));
}
}
// The two wxFileNames don't change after this
const wxString avcodec_filename_full{ avcodec_filename.GetFullPath() };
const wxString avutil_filename_full{ avutil_filename.GetFullPath() };
if (!util) {
util = (avutil = std::make_unique<wxDynamicLibrary>()).get();
wxLogMessage(wxT("Loading avutil from '%s'."), avutil_filename_full);
util->Load(avutil_filename_full, wxDL_LAZY);
}
if (!codec) {
codec = (avcodec = std::make_unique<wxDynamicLibrary>()).get();
wxLogMessage(wxT("Loading avcodec from '%s'."), avcodec_filename_full);
codec->Load(avcodec_filename_full, wxDL_LAZY);
}
if (!avformat->IsLoaded()) {
name.SetFullName(libpath_format);
nameFull = name.GetFullPath();
wxLogMessage(wxT("Loading avformat from '%s'."), nameFull);
gotError = !avformat->Load(nameFull, wxDL_LAZY);
}
#if defined(__WXMSW__)
//Return PATH to normal
if ( pathfix )
{
wxString oldpath = syspath.BeforeLast(wxT(';'));
wxLogMessage(wxT("Returning PATH to previous setting..."));
wxSetEnv(wxT("PATH"),oldpath);
}
#endif
if (gotError) {
wxLogError(wxT("Failed to load FFmpeg libraries."));
FreeLibs();
return false;
}
// Show the actual libraries loaded
if (avutil) {
wxLogMessage(wxT("Actual avutil path %s"),
FileNames::PathFromAddr(avutil->GetSymbol(wxT("avutil_version"))));
}
if (avcodec) {
wxLogMessage(wxT("Actual avcodec path %s"),
FileNames::PathFromAddr(avcodec->GetSymbol(wxT("avcodec_version"))));
}
if (avformat) {
wxLogMessage(wxT("Actual avformat path %s"),
FileNames::PathFromAddr(avformat->GetSymbol(wxT("avformat_version"))));
}
wxLogMessage(wxT("Importing symbols..."));
FFMPEG_INITDYN(avformat, av_register_all);
FFMPEG_INITDYN(avformat, avformat_find_stream_info);
FFMPEG_INITDYN(avformat, av_read_frame);
FFMPEG_INITDYN(avformat, av_seek_frame);
FFMPEG_INITDYN(avformat, avformat_close_input);
FFMPEG_INITDYN(avformat, avformat_write_header);
FFMPEG_INITDYN(avformat, av_interleaved_write_frame);
FFMPEG_INITDYN(avformat, av_oformat_next);
FFMPEG_INITDYN(avformat, avformat_new_stream);
FFMPEG_INITDYN(avformat, avformat_alloc_context);
FFMPEG_INITDYN(avformat, av_write_trailer);
FFMPEG_INITDYN(avformat, av_codec_get_tag);
FFMPEG_INITDYN(avformat, avformat_version);
FFMPEG_INITDYN(avformat, avformat_open_input);
FFMPEG_INITDYN(avformat, avio_size);
FFMPEG_INITDYN(avformat, avio_alloc_context);
FFMPEG_INITALT(avformat, av_guess_format, avformat, guess_format);
FFMPEG_INITDYN(avformat, avformat_free_context);
FFMPEG_INITDYN(avcodec, av_init_packet);
FFMPEG_INITDYN(avcodec, av_free_packet);
FFMPEG_INITDYN(avcodec, avcodec_find_encoder);
FFMPEG_INITDYN(avcodec, avcodec_find_encoder_by_name);
FFMPEG_INITDYN(avcodec, avcodec_find_decoder);
FFMPEG_INITDYN(avcodec, avcodec_get_name);
FFMPEG_INITDYN(avcodec, avcodec_open2);
FFMPEG_INITDYN(avcodec, avcodec_decode_audio4);
FFMPEG_INITDYN(avcodec, avcodec_encode_audio2);
FFMPEG_INITDYN(avcodec, avcodec_close);
FFMPEG_INITDYN(avcodec, avcodec_register_all);
FFMPEG_INITDYN(avcodec, avcodec_version);
FFMPEG_INITDYN(avcodec, av_codec_next);
FFMPEG_INITDYN(avcodec, av_codec_is_encoder);
FFMPEG_INITDYN(avcodec, avcodec_fill_audio_frame);
FFMPEG_INITDYN(avutil, av_free);
FFMPEG_INITDYN(avutil, av_dict_free);
FFMPEG_INITDYN(avutil, av_dict_get);
FFMPEG_INITDYN(avutil, av_dict_set);
FFMPEG_INITDYN(avutil, av_get_bytes_per_sample);
FFMPEG_INITDYN(avutil, av_log_set_callback);
FFMPEG_INITDYN(avutil, av_log_default_callback);
FFMPEG_INITDYN(avutil, av_fifo_alloc);
FFMPEG_INITDYN(avutil, av_fifo_generic_read);
FFMPEG_INITDYN(avutil, av_fifo_realloc2);
FFMPEG_INITDYN(avutil, av_fifo_free);
FFMPEG_INITDYN(avutil, av_fifo_size);
FFMPEG_INITDYN(avutil, av_malloc);
FFMPEG_INITDYN(avutil, av_fifo_generic_write);
// FFMPEG_INITDYN(avutil, av_freep);
FFMPEG_INITDYN(avutil, av_rescale_q);
FFMPEG_INITDYN(avutil, avutil_version);
FFMPEG_INITALT(avutil, av_frame_alloc, avcodec, avcodec_alloc_frame);
FFMPEG_INITALT(avutil, av_frame_free, avcodec, avcodec_free_frame);
FFMPEG_INITDYN(avutil, av_samples_get_buffer_size);
FFMPEG_INITDYN(avutil, av_get_default_channel_layout);
wxLogMessage(wxT("All symbols loaded successfully. Initializing the library."));
#endif
//FFmpeg initialization
avcodec_register_all();
av_register_all();
wxLogMessage(wxT("Retrieving FFmpeg library version numbers:"));
int avfver = avformat_version();
int avcver = avcodec_version();
int avuver = avutil_version();
mAVCodecVersion = wxString::Format(wxT("%d.%d.%d"),avcver >> 16 & 0xFF, avcver >> 8 & 0xFF, avcver & 0xFF);
mAVFormatVersion = wxString::Format(wxT("%d.%d.%d"),avfver >> 16 & 0xFF, avfver >> 8 & 0xFF, avfver & 0xFF);
mAVUtilVersion = wxString::Format(wxT("%d.%d.%d"),avuver >> 16 & 0xFF, avuver >> 8 & 0xFF, avuver & 0xFF);
wxLogMessage(wxT(" AVCodec version 0x%06x - %s (built against 0x%06x - %s)"),
avcver, mAVCodecVersion, LIBAVCODEC_VERSION_INT,
wxString::FromUTF8(AV_STRINGIFY(LIBAVCODEC_VERSION)));
wxLogMessage(wxT(" AVFormat version 0x%06x - %s (built against 0x%06x - %s)"),
avfver, mAVFormatVersion, LIBAVFORMAT_VERSION_INT,
wxString::FromUTF8(AV_STRINGIFY(LIBAVFORMAT_VERSION)));
wxLogMessage(wxT(" AVUtil version 0x%06x - %s (built against 0x%06x - %s)"),
avuver,mAVUtilVersion, LIBAVUTIL_VERSION_INT,
wxString::FromUTF8(AV_STRINGIFY(LIBAVUTIL_VERSION)));
int avcverdiff = (avcver >> 16 & 0xFF) - (int)(LIBAVCODEC_VERSION_MAJOR);
int avfverdiff = (avfver >> 16 & 0xFF) - (int)(LIBAVFORMAT_VERSION_MAJOR);
int avuverdiff = (avuver >> 16 & 0xFF) - (int)(LIBAVUTIL_VERSION_MAJOR);
if (avcverdiff != 0)
wxLogError(wxT("AVCodec version mismatch = %d"), avcverdiff);
if (avfverdiff != 0)
wxLogError(wxT("AVFormat version mismatch = %d"), avfverdiff);
if (avuverdiff != 0)
wxLogError(wxT("AVUtil version mismatch = %d"), avuverdiff);
//make sure that header and library major versions are the same
if (avcverdiff != 0 || avfverdiff != 0 || avuverdiff != 0)
{
wxLogError(wxT("Version mismatch. FFmpeg libraries are unusable."));
return false;
}
return true;
}
void FFmpegLibs::FreeLibs()
{
avformat.reset();
avcodec.reset();
avutil.reset();
mLibsLoaded = false;
return;
}
#endif //USE_FFMPEG
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