Aegisub/aegisub/src/audio_provider_ffmpegsource...

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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 audio_provider_ffmpegsource.cpp
/// @brief ffms2-based audio provider
/// @ingroup audio_input ffms
///
#include "config.h"
#ifdef WITH_FFMPEGSOURCE
///////////
// Headers
#ifndef AGI_PRE
#ifdef WIN32
#include <objbase.h>
#endif
#include <map>
#endif
#include "audio_provider_ffmpegsource.h"
#include "include/aegisub/aegisub.h"
#include "main.h"
/// @brief Constructor
/// @param filename
///
FFmpegSourceAudioProvider::FFmpegSourceAudioProvider(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
FFMS_Init(0);
ErrInfo.Buffer = FFMSErrMsg;
ErrInfo.BufferSize = sizeof(FFMSErrMsg);
ErrInfo.ErrorType = FFMS_ERROR_SUCCESS;
ErrInfo.SubType = FFMS_ERROR_SUCCESS;
ErrorMsg = _T("FFmpegSource audio provider: ");
AudioSource = NULL;
SetLogLevel();
try {
LoadAudio(filename);
} catch (...) {
Close();
throw;
}
}
/// @brief Load audio file
/// @param filename
///
void FFmpegSourceAudioProvider::LoadAudio(wxString filename) {
// clean up
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_AUDIO);
if (TrackList.size() <= 0)
throw _T("FFmpegSource audio provider: 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 _T("FFmpegSource audio provider: audio 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;
}
// 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;
ErrorMsg.Append(wxString::Format(_T("Couldn't find any audio tracks: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
// 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)
TrackMask = FFMS_TRACKMASK_ALL;
else
TrackMask = (1 << TrackNumber);
try {
Index = DoIndexing(Indexer, CacheName, TrackMask, GetErrorHandlingMode());
} catch (wxString temp) {
ErrorMsg.Append(temp);
throw ErrorMsg;
} catch (...) {
throw;
}
// 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
if (!wxFileName(CacheName).Touch()) {
// warn user?
}
AudioSource = FFMS_CreateAudioSource(FileNameShort.utf8_str(), TrackNumber, Index, &ErrInfo);
FFMS_DestroyIndex(Index);
Index = NULL;
if (!AudioSource) {
ErrorMsg.Append(wxString::Format(_T("Failed to open audio track: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
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 _T("FFmpegSource audio provider: 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 _T("FFmpegSource audio provider: unknown or unsupported sample format");
}
}
/// @brief Destructor
///
FFmpegSourceAudioProvider::~FFmpegSourceAudioProvider() {
Close();
#ifdef WIN32
if (COMInited)
CoUninitialize();
#endif
}
/// @brief Clean up
///
void FFmpegSourceAudioProvider::Close() {
FFMS_DestroyAudioSource(AudioSource);
AudioSource = NULL;
}
/// @brief Get audio
/// @param Buf
/// @param Start
/// @param Count
///
void FFmpegSourceAudioProvider::GetAudio(void *Buf, int64_t Start, int64_t Count) {
if (FFMS_GetAudio(AudioSource, Buf, Start, Count, &ErrInfo)) {
ErrorMsg.Append(wxString::Format(_T("Failed to get audio samples: %s"), ErrInfo.Buffer));
throw ErrorMsg;
}
}
#endif /* WITH_FFMPEGSOURCE */