Aegisub/aegisub/src/video_provider_ffmpegsource.cpp

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// Copyright (c) 2008-2009, Karl Blomster
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
//
// $Id$
/// @file video_provider_ffmpegsource.cpp
/// @brief FFmpegSource2-based video provider
/// @ingroup video_input ffms
///
#include "config.h"
#ifdef WITH_FFMPEGSOURCE
///////////
// Headers
#ifndef AGI_PRE
#ifdef __WINDOWS__
#include <objbase.h>
#endif
#include <map>
#include <wx/choicdlg.h>
#include <wx/msgdlg.h>
#include <wx/utils.h>
#endif
#include "aegisub_endian.h"
#include "include/aegisub/aegisub.h"
#include "options.h"
#include "video_context.h"
#include "video_provider_ffmpegsource.h"
/// @brief Constructor
/// @param filename The filename to open
FFmpegSourceVideoProvider::FFmpegSourceVideoProvider(wxString filename) {
COMInited = false;
#ifdef WIN32
HRESULT res;
res = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
if (SUCCEEDED(res))
COMInited = true;
else if (res != RPC_E_CHANGED_MODE)
throw _T("FFmpegSource video provider: COM initialization failure");
#endif
// initialize ffmpegsource
// FIXME: CPU detection?
FFMS_Init(0);
// clean up variables
VideoSource = NULL;
KeyFramesLoaded = false;
FrameNumber = -1;
ErrInfo.Buffer = FFMSErrMsg;
ErrInfo.BufferSize = sizeof(FFMSErrMsg);
ErrInfo.ErrorType = FFMS_ERROR_SUCCESS;
ErrInfo.SubType = FFMS_ERROR_SUCCESS;
ErrorMsg = _T("FFmpegSource video provider: ");
SetLogLevel();
// and here we go
try {
LoadVideo(filename);
} catch (...) {
Close();
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throw;
}
}
/// @brief Destructor
FFmpegSourceVideoProvider::~FFmpegSourceVideoProvider() {
Close();
#ifdef WIN32
if (COMInited)
CoUninitialize();
#endif
}
/// @brief Opens video
/// @param filename The filename to open
void FFmpegSourceVideoProvider::LoadVideo(wxString filename) {
// make sure we don't have anything messy lying around
Close();
wxString FileNameShort = wxFileName(filename).GetShortPath();
FFMS_Indexer *Indexer = FFMS_CreateIndexer(FileNameShort.utf8_str(), &ErrInfo);
if (Indexer == NULL) {
// error messages that can possibly contain a filename use this method instead of
// wxString::Format because they may contain utf8 characters
ErrorMsg.Append(_T("Failed to create indexer: ")).Append(wxString(ErrInfo.Buffer, wxConvUTF8));
throw ErrorMsg;
}
std::map<int,wxString> TrackList = GetTracksOfType(Indexer, FFMS_TYPE_VIDEO);
if (TrackList.size() <= 0)
throw _T("FFmpegSource video provider: no video tracks found");
// initialize the track number to an invalid value so we can detect later on
// whether the user actually had to choose a track or not
int TrackNumber = -1;
if (TrackList.size() > 1) {
TrackNumber = AskForTrackSelection(TrackList, FFMS_TYPE_VIDEO);
// if it's still -1 here, user pressed cancel
if (TrackNumber == -1)
throw _T("FFmpegSource video provider: video loading cancelled by user");
}
// generate a name for the cache file
wxString CacheName = GetCacheFilename(filename);
// try to read index
FFMS_Index *Index = NULL;
Index = FFMS_ReadIndex(CacheName.utf8_str(), &ErrInfo);
bool IndexIsValid = false;
if (Index != NULL) {
if (FFMS_IndexBelongsToFile(Index, FileNameShort.utf8_str(), &ErrInfo)) {
FFMS_DestroyIndex(Index);
Index = NULL;
}
else
IndexIsValid = true;
}
// time to examine the index and check if the track we want is indexed
// technically this isn't really needed since all video tracks should always be indexed,
// but a bit of sanity checking never hurt anyone
if (IndexIsValid && TrackNumber >= 0) {
FFMS_Track *TempTrackData = FFMS_GetTrackFromIndex(Index, TrackNumber);
if (FFMS_GetNumFrames(TempTrackData) <= 0) {
IndexIsValid = false;
FFMS_DestroyIndex(Index);
Index = NULL;
}
}
// moment of truth
if (!IndexIsValid) {
int TrackMask = Options.AsBool(_T("FFmpegSource always index all tracks")) ? FFMS_TRACKMASK_ALL : FFMS_TRACKMASK_NONE;
try {
// ignore audio decoding errors here, we don't care right now
Index = DoIndexing(Indexer, CacheName, TrackMask, true);
} catch (wxString temp) {
ErrorMsg.Append(temp);
throw ErrorMsg;
} catch (...) {
throw;
}
}
// update access time of index file so it won't get cleaned away
wxFileName(CacheName).Touch();
// we have now read the index and may proceed with cleaning the index cache
if (!CleanCache()) {
//do something?
}
// track number still not set?
if (TrackNumber < 0) {
// just grab the first track
TrackNumber = FFMS_GetFirstIndexedTrackOfType(Index, FFMS_TYPE_VIDEO, &ErrInfo);
if (TrackNumber < 0) {
FFMS_DestroyIndex(Index);
Index = NULL;
ErrorMsg.Append(wxString::Format(_T("Couldn't find any video tracks: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
}
// set thread count
int Threads = Options.AsInt(_T("FFmpegSource decoding threads"));
if (Threads < 1)
throw _T("FFmpegSource video provider: invalid decoding thread count");
// set seekmode
// TODO: give this its own option?
int SeekMode;
if (Options.AsBool(_T("FFmpeg allow unsafe seeking")))
SeekMode = FFMS_SEEK_UNSAFE;
else
SeekMode = FFMS_SEEK_NORMAL;
VideoSource = FFMS_CreateVideoSource(FileNameShort.utf8_str(), TrackNumber, Index, Threads, SeekMode, &ErrInfo);
FFMS_DestroyIndex(Index);
Index = NULL;
if (VideoSource == NULL) {
ErrorMsg.Append(wxString::Format(_T("Failed to open video track: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
// load video properties
VideoInfo = FFMS_GetVideoProperties(VideoSource);
const FFMS_Frame *TempFrame = FFMS_GetFrame(VideoSource, 0, &ErrInfo);
if (TempFrame == NULL) {
ErrorMsg.Append(wxString::Format(_T("Failed to decode first frame: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
Width = TempFrame->EncodedWidth;
Height = TempFrame->EncodedHeight;
if (FFMS_SetOutputFormatV(VideoSource, 1 << FFMS_GetPixFmt("bgra"), Width, Height, FFMS_RESIZER_BICUBIC, &ErrInfo)) {
ErrorMsg.Append(wxString::Format(_T("Failed to set output format: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
// get frame info data
FFMS_Track *FrameData = FFMS_GetTrackFromVideo(VideoSource);
if (FrameData == NULL)
throw _T("FFmpegSource video provider: failed to get frame data");
const FFMS_TrackTimeBase *TimeBase = FFMS_GetTimeBase(FrameData);
if (TimeBase == NULL)
throw _T("FFmpegSource video provider: failed to get track time base");
const FFMS_FrameInfo *CurFrameData;
// build list of keyframes and timecodes
for (int CurFrameNum = 0; CurFrameNum < VideoInfo->NumFrames; CurFrameNum++) {
CurFrameData = FFMS_GetFrameInfo(FrameData, CurFrameNum);
if (CurFrameData == NULL) {
ErrorMsg.Append(wxString::Format(_T("Couldn't get info about frame %d"), CurFrameNum));
throw ErrorMsg;
}
// keyframe?
if (CurFrameData->KeyFrame)
KeyFramesList.Add(CurFrameNum);
// calculate timestamp and add to timecodes vector
int Timestamp = (int)((CurFrameData->PTS * TimeBase->Num) / TimeBase->Den);
TimecodesVector.push_back(Timestamp);
}
KeyFramesLoaded = true;
// override already loaded timecodes?
Timecodes.SetVFR(TimecodesVector);
int OverrideTC = wxYES;
if (VFR_Output.IsLoaded()) {
OverrideTC = wxMessageBox(_("You already have timecodes loaded. Would you like to replace them with timecodes from the video file?"), _("Replace timecodes?"), wxYES_NO | wxICON_QUESTION);
if (OverrideTC == wxYES) {
VFR_Input.SetVFR(TimecodesVector);
VFR_Output.SetVFR(TimecodesVector);
}
} else { // no timecodes loaded, go ahead and apply
VFR_Input.SetVFR(TimecodesVector);
VFR_Output.SetVFR(TimecodesVector);
}
FrameNumber = 0;
}
/// @brief Close video
///
void FFmpegSourceVideoProvider::Close() {
FFMS_DestroyVideoSource(VideoSource);
VideoSource = NULL;
KeyFramesLoaded = false;
KeyFramesList.clear();
TimecodesVector.clear();
FrameNumber = -1;
CurFrame.Clear();
}
/// @brief Get frame
/// @param _n
/// @return
///
const AegiVideoFrame FFmpegSourceVideoProvider::GetFrame(int _n) {
// don't try to seek to insane places
int n = _n;
if (n < 0)
n = 0;
if (n >= GetFrameCount())
n = GetFrameCount()-1;
// set position
FrameNumber = n;
// decode frame
const FFMS_Frame *SrcFrame = FFMS_GetFrame(VideoSource, n, &ErrInfo);
if (SrcFrame == NULL) {
ErrorMsg.Append(wxString::Format(_T("Failed to retrieve frame: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
CurFrame.SetTo(SrcFrame->Data, Width, Height, SrcFrame->Linesize, FORMAT_RGB32);
return CurFrame;
}
/// @brief Utility functions
/// @return
///
int FFmpegSourceVideoProvider::GetWidth() {
return Width;
}
/// @brief DOCME
/// @return
///
int FFmpegSourceVideoProvider::GetHeight() {
return Height;
}
/// @brief DOCME
/// @return
///
int FFmpegSourceVideoProvider::GetFrameCount() {
return VideoInfo->NumFrames;
}
/// @brief DOCME
/// @return
///
int FFmpegSourceVideoProvider::GetPosition() {
return FrameNumber;
}
/// @brief DOCME
///
double FFmpegSourceVideoProvider::GetFPS() {
return double(VideoInfo->FPSNumerator) / double(VideoInfo->FPSDenominator);
}
#endif /* WITH_FFMPEGSOURCE */