static AVSValue __cdecl CreateFFAudioSource(AVSValue Args, void* UserData, IScriptEnvironment* Env) {
FFMS_Init((int)AvisynthToFFCPUFlags(Env->GetCPUFlags()), Args[5].AsBool(false));
char ErrorMsg[1024];
FFMS_ErrorInfo E;
E.Buffer = ErrorMsg;
E.BufferSize = sizeof(ErrorMsg);
if (!Args[0].Defined())
Env->ThrowError("FFAudioSource: No source specified");
const char *Source = Args[0].AsString();
int Track = Args[1].AsInt(-1);
bool Cache = Args[2].AsBool(true);
const char *CacheFile = Args[3].AsString("");
int AdjustDelay = Args[4].AsInt(-1);
const char *VarPrefix = Args[6].AsString("");
if (Track <= -2)
Env->ThrowError("FFAudioSource: No audio track selected");
FFMS_Index *Index = NULL;
std::string DefaultCache;
if (Cache) {
if (*CacheFile) {
if (!_stricmp(Source, CacheFile))
Env->ThrowError("FFAudioSource: Cache will overwrite the source");
Index = FFMS_ReadIndex(CacheFile, &E);
}
else {
DefaultCache = Source;
DefaultCache += ".ffindex";
CacheFile = DefaultCache.c_str();
Index = FFMS_ReadIndex(CacheFile, &E);
// Reindex if the index doesn't match the file and its name wasn't
// explicitly given
if (Index && FFMS_IndexBelongsToFile(Index, Source, 0) != FFMS_ERROR_SUCCESS) {
FFMS_DestroyIndex(Index);
Index = 0;
}
}
}
// Index needs to be remade if it is an unindexed audio track
if (Index && Track >= 0 && Track < FFMS_GetNumTracks(Index)
&& FFMS_GetTrackType(FFMS_GetTrackFromIndex(Index, Track)) == FFMS_TYPE_AUDIO
&& FFMS_GetNumFrames(FFMS_GetTrackFromIndex(Index, Track)) == 0) {
FFMS_DestroyIndex(Index);
Index = NULL;
}
// More complicated for finding a default track, reindex the file if at least one audio track exists
if (Index && FFMS_GetFirstTrackOfType(Index, FFMS_TYPE_AUDIO, &E) >= 0
&& FFMS_GetFirstIndexedTrackOfType(Index, FFMS_TYPE_AUDIO, &E) < 0) {
for (int i = 0; i < FFMS_GetNumTracks(Index); i++) {
if (FFMS_GetTrackType(FFMS_GetTrackFromIndex(Index, i)) == FFMS_TYPE_AUDIO) {
FFMS_DestroyIndex(Index);
Index = NULL;
break;
}
}
}
if (!Index) {
if (!(Index = FFMS_MakeIndex(Source, -1, 0, NULL, NULL, true, NULL, NULL, &E)))
Env->ThrowError("FFAudioSource: %s", E.Buffer);
if (Cache)
if (FFMS_WriteIndex(CacheFile, Index, &E)) {
FFMS_DestroyIndex(Index);
Env->ThrowError("FFAudioSource: %s", E.Buffer);
}
}
if (Track == -1)
Track = FFMS_GetFirstIndexedTrackOfType(Index, FFMS_TYPE_AUDIO, &E);
if (Track < 0)
Env->ThrowError("FFAudioSource: No audio track found");
if (AdjustDelay < -3)
Env->ThrowError("FFAudioSource: Invalid delay adjustment specified");
if (AdjustDelay >= FFMS_GetNumTracks(Index))
Env->ThrowError("FFAudioSource: Invalid track to calculate delay from specified");
AvisynthAudioSource *Filter;
try {
Filter = new AvisynthAudioSource(Source, Track, Index, AdjustDelay, VarPrefix, Env);
} catch (...) {
FFMS_DestroyIndex(Index);
throw;
}
FFMS_DestroyIndex(Index);
return Filter;
}
/// @brief Load audio file
/// @param filename
///
void FFmpegSourceAudioProvider::LoadAudio(std::string filename) {
// wxString FileNameShort = wxFileName(filename).GetShortPath();
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_AUDIO);
if (TrackList.size() <= 0)
throw AudioOpenError("no audio 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_AUDIO);
// if it's still -1 here, user pressed cancel
if (TrackNumber == -1)
throw agi::UserCancelException("audio 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;
}
// index valid but track number still not set?
if (IndexIsValid) {
// track number not set? just grab the first track
if (TrackNumber < 0)
TrackNumber = FFMS_GetFirstTrackOfType(Index, FFMS_TYPE_AUDIO, &ErrInfo);
if (TrackNumber < 0) {
FFMS_DestroyIndex(Index);
Index = NULL;
throw AudioOpenError(std::string("Couldn't find any audio tracks: ") + ErrInfo.Buffer);
}
// index is valid and track number is now set,
// but do we have indexing info for the desired audio track?
FFMS_Track *TempTrackData = FFMS_GetTrackFromIndex(Index, TrackNumber);
if (FFMS_GetNumFrames(TempTrackData) <= 0) {
IndexIsValid = false;
FFMS_DestroyIndex(Index);
Index = NULL;
}
}
// no valid index exists and the file only has one audio track, index it
else if (TrackNumber < 0)
TrackNumber = FFMS_TRACKMASK_ALL;
// else: do nothing (keep track mask as it is)
// moment of truth
if (!IndexIsValid) {
int TrackMask;
// if (OPT_GET("Provider/FFmpegSource/Index All Tracks")->GetBool() || TrackNumber == FFMS_TRACKMASK_ALL)
if (TrackNumber == FFMS_TRACKMASK_ALL)
TrackMask = FFMS_TRACKMASK_ALL;
else
TrackMask = (1 << TrackNumber);
try {
Index = DoIndexing(Indexer, CacheName, TrackMask, GetErrorHandlingMode());
}
catch (std::string const& err) {
throw AudioOpenError(err);
}
// if tracknumber still isn't set we need to set it now
if (TrackNumber == FFMS_TRACKMASK_ALL)
TrackNumber = FFMS_GetFirstTrackOfType(Index, FFMS_TYPE_AUDIO, &ErrInfo);
}
// update access time of index file so it won't get cleaned away
///XXX: Add something to libaegisub to support this.
// if (!wxFileName(CacheName).Touch()) {
// warn user?
// }
#if FFMS_VERSION >= ((2 << 24) | (14 << 16) | (1 << 8) | 0)
AudioSource = FFMS_CreateAudioSource(filename.c_str(), TrackNumber, Index, -1, &ErrInfo);
#else
AudioSource = FFMS_CreateAudioSource(filename.c_str(), TrackNumber, Index, &ErrInfo);
#endif
FFMS_DestroyIndex(Index);
Index = NULL;
if (!AudioSource) {
throw AudioOpenError(std::string("Failed to open audio track: %s") + ErrInfo.Buffer);
}
const FFMS_AudioProperties AudioInfo = *FFMS_GetAudioProperties(AudioSource);
channels = AudioInfo.Channels;
sample_rate = AudioInfo.SampleRate;
num_samples = AudioInfo.NumSamples;
if (channels <= 0 || sample_rate <= 0 || num_samples <= 0)
throw AudioOpenError("sanity check failed, consult your local psychiatrist");
// FIXME: use the actual sample format too?
// why not just bits_per_sample/8? maybe there's some oddball format with half bytes out there somewhere...
switch (AudioInfo.BitsPerSample) {
case 8: bytes_per_sample = 1; break;
case 16: bytes_per_sample = 2; break;
case 24: bytes_per_sample = 3; break;
case 32: bytes_per_sample = 4; break;
default:
throw AudioOpenError("unknown or unsupported sample format");
}
}
// Constructor and destructor
c_media_file_ffms::c_media_file_ffms(boost::filesystem::path path) :
// Path
m_path(path),
// File
m_source(nullptr),
// Info
m_frames(0), m_rate(0), m_aspect(1), m_width(0), m_height(0)
{
// Debug
//std::cout << boost::format("FFMS: Opening file! path = %1%") % path << std::endl;
// FFMS error
m_fferr.Buffer = m_ffmsg.data();
m_fferr.BufferSize = m_ffmsg.size();
m_fferr.ErrorType = FFMS_ERROR_SUCCESS;
m_fferr.SubType = FFMS_ERROR_SUCCESS;
// Library
FFMS_Init(0, 1);
// Index
FFMS_Index* index = nullptr;
// Cached index
auto path_index = m_path;
path_index.replace_extension(".ffindex");
if (boost::filesystem::is_regular_file(path_index)) {
// Read index
index = FFMS_ReadIndex(path_index.c_str(), &m_fferr);
if (index) {
// Check validity
int result = FFMS_IndexBelongsToFile(index, m_path.c_str(), &m_fferr);
if (result) {
// Invalid index
FFMS_DestroyIndex(index);
index = nullptr;
// Delete index file too
boost::filesystem::remove(path_index);
}
}
}
// Create index
if (!index) {
// Indexer
FFMS_Indexer* indexer = FFMS_CreateIndexer(m_path.c_str(), &m_fferr);
if (!indexer)
throw c_exception("FFMS: Could not create indexer!", { throw_format("path", m_path) });
//index = FFMS_DoIndexing2(indexer, FFMS_IEH_ABORT, &m_fferr);
index = FFMS_DoIndexing(indexer, 0, 0, nullptr, nullptr, FFMS_IEH_ABORT, nullptr, nullptr, &m_fferr);
if (!index)
throw c_exception("FFMS: Failed to index media!", { throw_format("path", m_path) });
// Write index to file
FFMS_WriteIndex(path_index.c_str(), index, &m_fferr);
}
// Track
int track_id = FFMS_GetFirstTrackOfType(index, FFMS_TYPE_VIDEO, &m_fferr);
if (track_id < 0) {
FFMS_DestroyIndex(index);
throw c_exception("FFMS: Failed to find any video tracks!", { throw_format("path", m_path) });
}
// Source
m_source = FFMS_CreateVideoSource(m_path.c_str(), track_id, index, 1, FFMS_SEEK_NORMAL, &m_fferr);
if (!m_source) {
FFMS_DestroyIndex(index);
throw c_exception("FFMS: Failed to create video source!", { throw_format("path", m_path) });
}
// Destroy index
FFMS_DestroyIndex(index);
index = nullptr;
// Video properties
const FFMS_VideoProperties* props = FFMS_GetVideoProperties(m_source);
m_frames = props->NumFrames;
if (props->FirstTime < props->LastTime && props->LastTime > 0.0)
m_rate = (props->LastTime - props->FirstTime) / static_cast<double>(m_frames);
else if (props->FPSNumerator != 0)
m_rate = static_cast<double>(props->FPSNumerator) / static_cast<double>(props->FPSDenominator);
if (props->SARNum != 0)
m_aspect = static_cast<double>(props->SARNum) / static_cast<double>(props->SARDen);
// First frame
const FFMS_Frame* frame = FFMS_GetFrame(m_source, 0, &m_fferr);
if (!frame)
throw c_exception("FFMS: Failed to get first video frame!", { throw_format("path", m_path) });
if (frame->ScaledWidth > 0)
m_width = frame->ScaledWidth;
else
m_width = frame->EncodedWidth;
if (frame->ScaledHeight > 0)
m_height = frame->ScaledHeight;
else
m_height = frame->EncodedHeight;
// Conversion
int pixfmts[2];
pixfmts[0] = FFMS_GetPixFmt("rgb24");
pixfmts[1] = -1;
if (FFMS_SetOutputFormatV2(m_source, pixfmts, frame->EncodedWidth, frame->EncodedHeight, FFMS_RESIZER_POINT, &m_fferr))
throw c_exception("FFMS: Failed to set output format!", { throw_format("path", m_path) });
// Info
std::cout << boost::format("FFMS: width = %d, height = %d, frames = %d, rate = %.3f, aspect = %.3f") %
m_width % m_height % m_frames % m_rate % m_aspect << std::endl;
}
