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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
///
#ifdef WITH_FFMS2
#include "ffmpegsource_common.h"
#include "include/aegisub/video_provider.h"
#include "options.h"
#include "utils.h"
#include "video_frame.h"
#include <libaegisub/fs.h>
#include <libaegisub/make_unique.h>
#include <boost/algorithm/string.hpp>
namespace {
typedef enum AGI_ColorSpaces {
AGI_CS_RGB = 0,
AGI_CS_BT709 = 1,
AGI_CS_UNSPECIFIED = 2,
AGI_CS_FCC = 4,
AGI_CS_BT470BG = 5,
AGI_CS_SMPTE170M = 6,
AGI_CS_SMPTE240M = 7,
AGI_CS_YCOCG = 8,
AGI_CS_BT2020_NCL = 9,
AGI_CS_BT2020_CL = 10,
AGI_CS_SMPTE2085 = 11,
AGI_CS_CHROMATICITY_DERIVED_NCL = 12,
AGI_CS_CHROMATICITY_DERIVED_CL = 13,
AGI_CS_ICTCP = 14
} AGI_ColorSpaces;
/// @class FFmpegSourceVideoProvider
/// @brief Implements video loading through the FFMS library.
class FFmpegSourceVideoProvider final : public VideoProvider, FFmpegSourceProvider {
/// video source object
agi::scoped_holder<FFMS_VideoSource*, void (FFMS_CC*)(FFMS_VideoSource*)> VideoSource;
const FFMS_VideoProperties *VideoInfo = nullptr; ///< video properties
int Width = -1; ///< width in pixels
int Height = -1; ///< height in pixels
int CS = -1; ///< Reported colorspace of first frame
int CR = -1; ///< Reported colorrange of first frame
double DAR; ///< display aspect ratio
std::vector<int> KeyFramesList; ///< list of keyframes
agi::vfr::Framerate Timecodes; ///< vfr object
std::string ColorSpace; ///< Colorspace name
std::string RealColorSpace; ///< Colorspace name
char FFMSErrMsg[1024]; ///< FFMS error message
FFMS_ErrorInfo ErrInfo; ///< FFMS error codes/messages
bool has_audio = false;
void LoadVideo(agi::fs::path const& filename, std::string const& colormatrix);
public:
FFmpegSourceVideoProvider(agi::fs::path const& filename, std::string const& colormatrix, agi::BackgroundRunner *br);
void GetFrame(int n, VideoFrame &out) override;
void SetColorSpace(std::string const& matrix) override {
if (matrix == ColorSpace) return;
if (matrix == RealColorSpace)
FFMS_SetInputFormatV(VideoSource, CS, CR, FFMS_GetPixFmt(""), nullptr);
else if (matrix == "TV.601")
FFMS_SetInputFormatV(VideoSource, AGI_CS_BT470BG, CR, FFMS_GetPixFmt(""), nullptr);
else
return;
ColorSpace = matrix;
}
int GetFrameCount() const override { return VideoInfo->NumFrames; }
int GetWidth() const override { return Width; }
int GetHeight() const override { return Height; }
double GetDAR() const override { return DAR; }
agi::vfr::Framerate GetFPS() const override { return Timecodes; }
std::string GetColorSpace() const override { return ColorSpace; }
std::string GetRealColorSpace() const override { return RealColorSpace; }
std::vector<int> GetKeyFrames() const override { return KeyFramesList; };
std::string GetDecoderName() const override { return "FFmpegSource"; }
bool WantsCaching() const override { return true; }
bool HasAudio() const override { return has_audio; }
};
std::string colormatrix_description(int cs, int cr) {
// Assuming TV for unspecified
std::string str = cr == FFMS_CR_JPEG ? "PC" : "TV";
switch (cs) {
case AGI_CS_RGB:
return "None";
case AGI_CS_BT709:
return str + ".709";
case AGI_CS_FCC:
return str + ".FCC";
case AGI_CS_BT470BG:
case AGI_CS_SMPTE170M:
return str + ".601";
case AGI_CS_SMPTE240M:
return str + ".240M";
default:
throw VideoOpenError("Unknown video color space");
}
}
FFmpegSourceVideoProvider::FFmpegSourceVideoProvider(agi::fs::path const& filename, std::string const& colormatrix, agi::BackgroundRunner *br) try
: FFmpegSourceProvider(br)
, VideoSource(nullptr, FFMS_DestroyVideoSource)
{
ErrInfo.Buffer = FFMSErrMsg;
ErrInfo.BufferSize = sizeof(FFMSErrMsg);
ErrInfo.ErrorType = FFMS_ERROR_SUCCESS;
ErrInfo.SubType = FFMS_ERROR_SUCCESS;
SetLogLevel();
LoadVideo(filename, colormatrix);
}
catch (agi::EnvironmentError const& err) {
throw VideoOpenError(err.GetMessage());
}
void FFmpegSourceVideoProvider::LoadVideo(agi::fs::path const& filename, std::string const& colormatrix) {
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);
}
const char* container = FFMS_GetFormatNameI(Indexer);
std::map<int, std::string> TrackList = GetTracksOfType(Indexer, FFMS_TYPE_VIDEO);
if (TrackList.size() <= 0)
throw VideoNotSupported("no video tracks found");
int TrackNumber = -1;
if (TrackList.size() > 1) {
auto Selection = AskForTrackSelection(TrackList, FFMS_TYPE_VIDEO);
if (Selection == TrackSelection::None)
throw agi::UserCancelException("video loading cancelled by user");
TrackNumber = static_cast<int>(Selection);
}
// 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))
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)
Index = nullptr;
}
// moment of truth
if (!Index) {
auto TrackMask = TrackSelection::None;
if (OPT_GET("Provider/FFmpegSource/Index All Tracks")->GetBool() || OPT_GET("Video/Open Audio")->GetBool())
TrackMask = TrackSelection::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);
}
// Check if there's an audio track
has_audio = FFMS_GetFirstTrackOfType(Index, FFMS_TYPE_AUDIO, nullptr) != -1;
// set thread count
int Threads = OPT_GET("Provider/Video/FFmpegSource/Decoding Threads")->GetInt();
// 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;
int VideoCS = CS = TempFrame->ColorSpace;
CR = TempFrame->ColorRange;
if (CS == AGI_CS_UNSPECIFIED)
CS = Width > 1024 || Height >= 600 ? AGI_CS_BT709 : AGI_CS_BT470BG;
RealColorSpace = ColorSpace = colormatrix_description(CS, CR);
if (CS != AGI_CS_RGB && CS != AGI_CS_BT470BG && ColorSpace != colormatrix && colormatrix == "TV.601") {
CS = AGI_CS_BT470BG;
ColorSpace = colormatrix_description(CS, CR);
}
if (CS != VideoCS) {
if (FFMS_SetInputFormatV(VideoSource, CS, CR, FFMS_GetPixFmt(""), &ErrInfo))
throw VideoOpenError(std::string("Failed to set input format: ") + ErrInfo.Buffer);
}
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);
if (FrameData == nullptr)
throw VideoOpenError("failed to get frame data");
const FFMS_TrackTimeBase *TimeBase = FFMS_GetTimeBase(FrameData);
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 {
bool normalize = !boost::algorithm::contains(container, "matroska");
Timecodes = agi::vfr::Framerate(TimecodesVector, normalize);
}
}
void FFmpegSourceVideoProvider::GetFrame(int n, VideoFrame &out) {
n = mid(0, n, GetFrameCount() - 1);
auto frame = FFMS_GetFrame(VideoSource, n, &ErrInfo);
if (!frame)
throw VideoDecodeError(std::string("Failed to retrieve frame: ") + ErrInfo.Buffer);
out.data.assign(frame->Data[0], frame->Data[0] + frame->Linesize[0] * Height);
out.flipped = false;
out.width = Width;
out.height = Height;
out.pitch = frame->Linesize[0];
}
}
std::unique_ptr<VideoProvider> CreateFFmpegSourceVideoProvider(agi::fs::path const& path, std::string const& colormatrix, agi::BackgroundRunner *br) {
return agi::make_unique<FFmpegSourceVideoProvider>(path, colormatrix, br);
}
#endif /* WITH_FFMS2 */