Aegisub/aegisub/libmedia/video/ffms_video.cpp

278 lines
7.9 KiB
C++

// Copyright (c) 2008-2009, Karl Blomster <thefluff@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// $Id$
/// @file ffms_video.h
/// @brief FFmpegSource Video support.
/// @ingroup fmms video
#include "config.h"
#ifdef WITH_FFMPEGSOURCE
#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 "ffms_video.h"
#include "libaegisub/util.h"
//#include "aegisub_endian.h"
//#include "compat.h"
//#include "main.h"
//#include "utils.h"
//#include "video_context.h"
//#include "video_provider_ffmpegsource.h"
namespace media {
namespace ffms {
/// @brief Constructor
/// @param filename The filename to open
FFmpegSourceVideoProvider::FFmpegSourceVideoProvider(std::string filename)
: VideoSource(NULL)
, VideoInfo(NULL)
, Width(-1)
, Height(-1)
, FrameNumber(-1)
, COMInited(false)
{
#ifdef WIN32
HRESULT res = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
if (SUCCEEDED(res))
COMInited = true;
else if (res != RPC_E_CHANGED_MODE)
throw VideoOpenError("COM initialization failure");
#endif
// initialize ffmpegsource
// FIXME: CPU detection?
#if FFMS_VERSION >= ((2 << 24) | (14 << 16) | (0 << 8) | 0)
FFMS_Init(0, 1);
#else
FFMS_Init(0);
#endif
ErrInfo.Buffer = FFMSErrMsg;
ErrInfo.BufferSize = sizeof(FFMSErrMsg);
ErrInfo.ErrorType = FFMS_ERROR_SUCCESS;
ErrInfo.SubType = FFMS_ERROR_SUCCESS;
// SetLogLevel();
// and here we go
try {
LoadVideo(filename);
}
catch (std::string const& err) {
Close();
throw VideoOpenError(err);
}
catch (...) {
Close();
throw;
}
}
/// @brief Destructor
FFmpegSourceVideoProvider::~FFmpegSourceVideoProvider() {
Close();
}
/// @brief Opens video
/// @param filename The filename to open
void FFmpegSourceVideoProvider::LoadVideo(std::string filename) {
FFMS_Indexer *Indexer = FFMS_CreateIndexer(filename.c_str(), &ErrInfo);
if (Indexer == NULL) {
throw agi::FileNotFoundError(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
std::string CacheName = GetCacheFilename(filename);
// try to read index
FFMS_Index *Index = NULL;
Index = FFMS_ReadIndex(CacheName.c_str(), &ErrInfo);
bool IndexIsValid = false;
if (Index != NULL) {
if (FFMS_IndexBelongsToFile(Index, filename.c_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 = OPT_GET("Provider/FFmpegSource/Index All Tracks")->GetBool() ? FFMS_TRACKMASK_ALL : FFMS_TRACKMASK_NONE;
int TrackMask = 1 ? FFMS_TRACKMASK_ALL : FFMS_TRACKMASK_NONE;
try {
// ignore audio decoding errors here, we don't care right now
Index = DoIndexing(Indexer, CacheName, TrackMask, FFMS_IEH_IGNORE);
}
catch (std::string err) {
throw VideoOpenError(err);
}
}
// update access time of index file so it won't get cleaned away
//XXX: wxFileName(CacheName).Touch();
// 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;
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();
int Threads = 1;
if (Threads < 1)
throw VideoOpenError("invalid decoding thread count");
// 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.c_str(), TrackNumber, Index, Threads, SeekMode, &ErrInfo);
FFMS_DestroyIndex(Index);
Index = NULL;
if (VideoSource == NULL) {
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 == NULL) {
throw VideoOpenError(std::string("Failed to decode first frame: ") + ErrInfo.Buffer);
}
Width = TempFrame->EncodedWidth;
Height = TempFrame->EncodedHeight;
if (FFMS_SetOutputFormatV(VideoSource, 1LL << FFMS_GetPixFmt("bgra"), 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 == NULL)
throw VideoOpenError("failed to get frame data");
const FFMS_TrackTimeBase *TimeBase = FFMS_GetTimeBase(FrameData);
if (TimeBase == NULL)
throw VideoOpenError("failed to get track time base");
const FFMS_FrameInfo *CurFrameData;
// build list of keyframes and timecodes
std::vector<int> TimecodesVector;
for (int CurFrameNum = 0; CurFrameNum < VideoInfo->NumFrames; CurFrameNum++) {
CurFrameData = FFMS_GetFrameInfo(FrameData, CurFrameNum);
if (CurFrameData == NULL) {
//XXX throw VideoOpenError(STD_STR(wxString::Format(L"Couldn't get info about frame %d", CurFrameNum)));
throw VideoOpenError("Couldn't get info about frame %d");
}
// 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);
}
Timecodes = agi::vfr::Framerate(TimecodesVector);
FrameNumber = 0;
}
/// @brief Close video
///
void FFmpegSourceVideoProvider::Close() {
if (VideoSource) FFMS_DestroyVideoSource(VideoSource);
#ifdef WIN32
if (COMInited)
CoUninitialize();
#endif
}
/// @brief Get frame
/// @param _n
/// @return
///
const media::AegiVideoFrame FFmpegSourceVideoProvider::GetFrame(int n) {
FrameNumber = agi::util::mid(0, n, GetFrameCount() - 1);
// decode frame
const FFMS_Frame *SrcFrame = FFMS_GetFrame(VideoSource, FrameNumber, &ErrInfo);
if (SrcFrame == NULL) {
throw VideoDecodeError(std::string("Failed to retrieve frame:") + ErrInfo.Buffer);
}
CurFrame.SetTo(SrcFrame->Data[0], Width, Height, SrcFrame->Linesize[0]);
return CurFrame;
}
#endif /* WITH_FFMPEGSOURCE */
} // namespace ffms
} // namespace media