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/
/// @file video_provider_ffmpegsource.cpp
/// @brief FFmpegSource2-based video provider
/// @ingroup video_input ffms
///
#include "config.h"
#ifdef WITH_FFMS2
#include "video_provider_ffmpegsource.h"
#include "aegisub_endian.h"
#include "compat.h"
#include "options.h"
#include "utils.h"
#include "video_context.h"
#include <libaegisub/fs.h>
#include <wx/choicdlg.h>
#include <wx/msgdlg.h>
FFmpegSourceVideoProvider::FFmpegSourceVideoProvider(agi::fs::path const& filename) try
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: VideoSource(nullptr, FFMS_DestroyVideoSource)
, VideoInfo(nullptr)
, Width(-1)
, Height(-1)
, FrameNumber(-1)
{
ErrInfo.Buffer = FFMSErrMsg;
ErrInfo.BufferSize = sizeof(FFMSErrMsg);
ErrInfo.ErrorType = FFMS_ERROR_SUCCESS;
ErrInfo.SubType = FFMS_ERROR_SUCCESS;
SetLogLevel();
LoadVideo(filename);
}
catch (std::string const& err) {
throw VideoOpenError(err);
}
catch (const char * err) {
throw VideoOpenError(err);
}
void FFmpegSourceVideoProvider::LoadVideo(agi::fs::path const& filename) {
FFMS_Indexer *Indexer = FFMS_CreateIndexer(filename.string().c_str(), &ErrInfo);
if (!Indexer) {
if (ErrInfo.SubType == FFMS_ERROR_FILE_READ)
throw agi::fs::FileNotFound(std::string(ErrInfo.Buffer));
else
throw VideoNotSupported(ErrInfo.Buffer);
}
std::map<int, std::string> TrackList = GetTracksOfType(Indexer, FFMS_TYPE_VIDEO);
if (TrackList.size() <= 0)
throw VideoNotSupported("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 agi::UserCancelException("video loading cancelled by user");
}
// generate a name for the cache file
auto CacheName = GetCacheFilename(filename);
// try to read index
agi::scoped_holder<FFMS_Index*, void (FFMS_CC*)(FFMS_Index*)>
Index(FFMS_ReadIndex(CacheName.string().c_str(), &ErrInfo), FFMS_DestroyIndex);
if (Index && FFMS_IndexBelongsToFile(Index, filename.string().c_str(), &ErrInfo))
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Index = nullptr;
// 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 (Index && TrackNumber >= 0) {
FFMS_Track *TempTrackData = FFMS_GetTrackFromIndex(Index, TrackNumber);
if (FFMS_GetNumFrames(TempTrackData) <= 0)
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Index = nullptr;
}
// moment of truth
if (!Index) {
int TrackMask = FFMS_TRACKMASK_NONE;
if (OPT_GET("Provider/FFmpegSource/Index All Tracks")->GetBool() || OPT_GET("Video/Open Audio")->GetBool())
TrackMask = FFMS_TRACKMASK_ALL;
Index = DoIndexing(Indexer, CacheName, TrackMask, GetErrorHandlingMode());
}
else {
FFMS_CancelIndexing(Indexer);
}
// update access time of index file so it won't get cleaned away
agi::fs::Touch(CacheName);
// we have now read the index and may proceed with cleaning the index cache
CleanCache();
// track number still not set?
if (TrackNumber < 0) {
// just grab the first track
TrackNumber = FFMS_GetFirstIndexedTrackOfType(Index, FFMS_TYPE_VIDEO, &ErrInfo);
if (TrackNumber < 0)
throw VideoNotSupported(std::string("Couldn't find any video tracks: ") + ErrInfo.Buffer);
}
// set thread count
int Threads = OPT_GET("Provider/Video/FFmpegSource/Decoding Threads")->GetInt();
if (FFMS_GetVersion() < ((2 << 24) | (17 << 16) | (2 << 8) | 1) && FFMS_GetSourceType(Index) == FFMS_SOURCE_LAVF)
Threads = 1;
// set seekmode
// TODO: give this its own option?
int SeekMode;
if (OPT_GET("Provider/Video/FFmpegSource/Unsafe Seeking")->GetBool())
SeekMode = FFMS_SEEK_UNSAFE;
else
SeekMode = FFMS_SEEK_NORMAL;
VideoSource = FFMS_CreateVideoSource(filename.string().c_str(), TrackNumber, Index, Threads, SeekMode, &ErrInfo);
if (!VideoSource)
throw VideoOpenError(std::string("Failed to open video track: ") + ErrInfo.Buffer);
// load video properties
VideoInfo = FFMS_GetVideoProperties(VideoSource);
const FFMS_Frame *TempFrame = FFMS_GetFrame(VideoSource, 0, &ErrInfo);
if (!TempFrame)
throw VideoOpenError(std::string("Failed to decode first frame: ") + ErrInfo.Buffer);
Width = TempFrame->EncodedWidth;
Height = TempFrame->EncodedHeight;
if (VideoInfo->SARDen > 0 && VideoInfo->SARNum > 0)
DAR = double(Width) * VideoInfo->SARNum / ((double)Height * VideoInfo->SARDen);
else
DAR = double(Width) / Height;
// Assuming TV for unspecified
ColorSpace = TempFrame->ColorRange == FFMS_CR_JPEG ? "PC" : "TV";
int CS = TempFrame->ColorSpace;
#if FFMS_VERSION >= ((2 << 24) | (17 << 16) | (1 << 8) | 0)
if (CS != FFMS_CS_RGB && CS != FFMS_CS_BT470BG && OPT_GET("Video/Force BT.601")->GetBool()) {
if (FFMS_SetInputFormatV(VideoSource, FFMS_CS_BT470BG, TempFrame->ColorRange, FFMS_GetPixFmt(""), &ErrInfo))
throw VideoOpenError(std::string("Failed to set input format: ") + ErrInfo.Buffer);
CS = FFMS_CS_BT470BG;
}
#endif
switch (CS) {
case FFMS_CS_RGB:
ColorSpace = "None";
break;
case FFMS_CS_BT709:
ColorSpace += ".709";
break;
case FFMS_CS_UNSPECIFIED:
ColorSpace += Width > 1024 || Height >= 600 ? "709" : "601";
break;
case FFMS_CS_FCC:
ColorSpace += ".FCC";
break;
case FFMS_CS_BT470BG:
case FFMS_CS_SMPTE170M:
ColorSpace += ".601";
break;
case FFMS_CS_SMPTE240M:
ColorSpace += ".240M";
break;
default:
throw VideoOpenError("Unknown video color space");
break;
}
const int TargetFormat[] = { FFMS_GetPixFmt("bgra"), -1 };
if (FFMS_SetOutputFormatV2(VideoSource, TargetFormat, Width, Height, FFMS_RESIZER_BICUBIC, &ErrInfo)) {
throw VideoOpenError(std::string("Failed to set output format: ") + ErrInfo.Buffer);
}
// get frame info data
FFMS_Track *FrameData = FFMS_GetTrackFromVideo(VideoSource);
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if (FrameData == nullptr)
throw VideoOpenError("failed to get frame data");
const FFMS_TrackTimeBase *TimeBase = FFMS_GetTimeBase(FrameData);
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if (TimeBase == nullptr)
throw VideoOpenError("failed to get track time base");
// build list of keyframes and timecodes
std::vector<int> TimecodesVector;
for (int CurFrameNum = 0; CurFrameNum < VideoInfo->NumFrames; CurFrameNum++) {
const FFMS_FrameInfo *CurFrameData = FFMS_GetFrameInfo(FrameData, CurFrameNum);
if (!CurFrameData)
throw VideoOpenError("Couldn't get info about frame " + std::to_string(CurFrameNum));
// keyframe?
if (CurFrameData->KeyFrame)
KeyFramesList.push_back(CurFrameNum);
// calculate timestamp and add to timecodes vector
int Timestamp = (int)((CurFrameData->PTS * TimeBase->Num) / TimeBase->Den);
TimecodesVector.push_back(Timestamp);
}
if (TimecodesVector.size() < 2)
Timecodes = 25.0;
else
Timecodes = agi::vfr::Framerate(TimecodesVector);
FrameNumber = 0;
}
const AegiVideoFrame FFmpegSourceVideoProvider::GetFrame(int n) {
FrameNumber = mid(0, n, GetFrameCount() - 1);
// decode frame
const FFMS_Frame *SrcFrame = FFMS_GetFrame(VideoSource, FrameNumber, &ErrInfo);
if (!SrcFrame)
throw VideoDecodeError(std::string("Failed to retrieve frame: ") + ErrInfo.Buffer);
CurFrame.SetTo(SrcFrame->Data[0], Width, Height, SrcFrame->Linesize[0]);
return CurFrame;
}
#endif /* WITH_FFMS2 */