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Copy audio_provider_ffmpegsource.(cpp|h) to ./ffms_audio.(cpp|h) and remove wx usage.. The plan is to move a/v support to libaegisub and write unit tests to make sure we can open/close/seek the "official" formats we want to support.

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Originally committed to SVN as r5269.
This commit is contained in:
Amar Takhar 2011-02-02 23:11:17 +00:00
parent b3562eb917
commit 1219b069b1
2 changed files with 277 additions and 0 deletions
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220
aegisub/libaegisub/common/ffms_audio.cpp Normal file
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// 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_audio.cpp
/// @brief FFmpegSource Audio support.
/// @ingroup fmms audio
#include "config.h"
#ifndef AGI_PRE
#endif
#include "ffms_audio.h"
namespace ffms {
/// @brief Constructor
/// @param filename
///
Audio::Audio(std::string filename)
: AudioSource(NULL)
, COMInited(false)
{
#ifdef WIN32
HRESULT res;
res = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
if (SUCCEEDED(res))
COMInited = true;
else if (res != RPC_E_CHANGED_MODE)
throw AudioOpenError("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();
try {
LoadAudio(filename);
} catch (...) {
Close();
throw;
}
}
/// @brief Load audio file
/// @param filename
///
void Audio::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(FileNameShort.utf8_str(), TrackNumber, Index, -1, &ErrInfo);
#else
AudioSource = FFMS_CreateAudioSource(FileNameShort.utf8_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");
}
}
/// @brief Destructor
///
Audio::~Audio() {
Close();
}
/// @brief Clean up
///
void FFmpegSourceAudioProvider::Close() {
if (AudioSource) FFMS_DestroyAudioSource(AudioSource);
#ifdef WIN32
if (COMInited)
CoUninitialize();
#endif
}
/// @brief Get audio
/// @param Buf
/// @param Start
/// @param Count
///
void Audio::GetAudio(void *Buf, int64_t Start, int64_t Count) const {
if (FFMS_GetAudio(AudioSource, Buf, Start, Count, &ErrInfo)) {
throw AudioDecodeError(std::string("Failed to get audio samples: ") + ErrInfo.Buffer);
}
}
} // namespace ffms

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aegisub/libaegisub/common/ffms_audio.h Normal file
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// 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_audio.h
/// @brief FFmpegSource Audio support.
/// @ingroup fmms audio
#include "../../libffms/include/ffms.h"
#include <libaegisub/exception.h>
#ifndef AGI_PRE
#ifdef WIN32
#include <objbase.h>
#endif
#include <map>
#endif
namespace ffms {
class Audio {
FFMS_AudioSource *AudioSource; ///< audio source object
bool COMInited; ///< COM initialization state
mutable char FFMSErrMsg[1024]; ///< FFMS error message
mutable FFMS_ErrorInfo ErrInfo; ///< FFMS error codes/messages
void Close();
void LoadAudio(std::string filename);
Audio(std::string filename);
virtual ~Audio();
/// @brief Checks sample endianness
/// @return Returns true.
/// FFMS always delivers native endian samples.
bool AreSamplesNativeEndian() const { return true; }
bool NeedsCache() const { return true; }
virtual void GetAudio(void *buf, int64_t start, int64_t count) const;
};
} // namespace ffms