forked from mia/Aegisub
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.
Originally committed to SVN as r5269.
This commit is contained in:
Amar Takhar
parent
b3562eb917
commit
1219b069b1
2 changed files with 277 additions and 0 deletions
220
aegisub/libaegisub/common/ffms_audio.cpp
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220
aegisub/libaegisub/common/ffms_audio.cpp
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// Copyright (c) 2008-2009, Karl Blomster <thefluff@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// $Id$
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/// @file ffms_audio.cpp
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/// @brief FFmpegSource Audio support.
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/// @ingroup fmms audio
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#include "config.h"
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#ifndef AGI_PRE
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#endif
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#include "ffms_audio.h"
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namespace ffms {
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/// @brief Constructor
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/// @param filename
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///
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Audio::Audio(std::string filename)
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: AudioSource(NULL)
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, COMInited(false)
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{
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#ifdef WIN32
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HRESULT res;
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res = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
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if (SUCCEEDED(res))
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COMInited = true;
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else if (res != RPC_E_CHANGED_MODE)
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throw AudioOpenError("COM initialization failure");
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#endif
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// initialize ffmpegsource
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// FIXME: CPU detection?
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#if FFMS_VERSION >= ((2 << 24) | (14 << 16) | (0 << 8) | 0)
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FFMS_Init(0, 1);
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#else
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FFMS_Init(0);
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#endif
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ErrInfo.Buffer = FFMSErrMsg;
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ErrInfo.BufferSize = sizeof(FFMSErrMsg);
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ErrInfo.ErrorType = FFMS_ERROR_SUCCESS;
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ErrInfo.SubType = FFMS_ERROR_SUCCESS;
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// SetLogLevel();
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try {
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LoadAudio(filename);
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} catch (...) {
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Close();
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throw;
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}
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}
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/// @brief Load audio file
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/// @param filename
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///
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void Audio::LoadAudio(std::string filename) {
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// wxString FileNameShort = wxFileName(filename).GetShortPath();
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FFMS_Indexer *Indexer = FFMS_CreateIndexer(filename.c_str(), &ErrInfo);
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if (Indexer == NULL) {
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throw agi::FileNotFoundError(ErrInfo.Buffer);
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}
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std::map<int,std::string> TrackList = GetTracksOfType(Indexer, FFMS_TYPE_AUDIO);
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if (TrackList.size() <= 0)
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throw AudioOpenError("no audio tracks found");
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// initialize the track number to an invalid value so we can detect later on
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// whether the user actually had to choose a track or not
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int TrackNumber = -1;
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if (TrackList.size() > 1) {
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TrackNumber = AskForTrackSelection(TrackList, FFMS_TYPE_AUDIO);
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// if it's still -1 here, user pressed cancel
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if (TrackNumber == -1)
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throw agi::UserCancelException("audio loading cancelled by user");
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}
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// generate a name for the cache file
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std::string CacheName = GetCacheFilename(filename);
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// try to read index
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FFMS_Index *Index = NULL;
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Index = FFMS_ReadIndex(CacheName.c_str(), &ErrInfo);
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bool IndexIsValid = false;
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if (Index != NULL) {
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if (FFMS_IndexBelongsToFile(Index, filename.c_str(), &ErrInfo)) {
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FFMS_DestroyIndex(Index);
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Index = NULL;
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}
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else
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IndexIsValid = true;
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}
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// index valid but track number still not set?
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if (IndexIsValid) {
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// track number not set? just grab the first track
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if (TrackNumber < 0)
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TrackNumber = FFMS_GetFirstTrackOfType(Index, FFMS_TYPE_AUDIO, &ErrInfo);
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if (TrackNumber < 0) {
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FFMS_DestroyIndex(Index);
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Index = NULL;
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throw AudioOpenError(std::string("Couldn't find any audio tracks: ") + ErrInfo.Buffer);
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}
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// index is valid and track number is now set,
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// but do we have indexing info for the desired audio track?
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FFMS_Track *TempTrackData = FFMS_GetTrackFromIndex(Index, TrackNumber);
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if (FFMS_GetNumFrames(TempTrackData) <= 0) {
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IndexIsValid = false;
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FFMS_DestroyIndex(Index);
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Index = NULL;
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}
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}
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// no valid index exists and the file only has one audio track, index it
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else if (TrackNumber < 0)
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TrackNumber = FFMS_TRACKMASK_ALL;
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// else: do nothing (keep track mask as it is)
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// moment of truth
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if (!IndexIsValid) {
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int TrackMask;
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// if (OPT_GET("Provider/FFmpegSource/Index All Tracks")->GetBool() || TrackNumber == FFMS_TRACKMASK_ALL)
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if (TrackNumber == FFMS_TRACKMASK_ALL)
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TrackMask = FFMS_TRACKMASK_ALL;
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else
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TrackMask = (1 << TrackNumber);
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try {
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Index = DoIndexing(Indexer, CacheName, TrackMask, GetErrorHandlingMode());
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}
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catch (std::string const& err) {
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throw AudioOpenError(err);
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}
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// if tracknumber still isn't set we need to set it now
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if (TrackNumber == FFMS_TRACKMASK_ALL)
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TrackNumber = FFMS_GetFirstTrackOfType(Index, FFMS_TYPE_AUDIO, &ErrInfo);
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}
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// update access time of index file so it won't get cleaned away
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///XXX: Add something to libaegisub to support this.
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// if (!wxFileName(CacheName).Touch()) {
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// warn user?
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// }
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#if FFMS_VERSION >= ((2 << 24) | (14 << 16) | (1 << 8) | 0)
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AudioSource = FFMS_CreateAudioSource(FileNameShort.utf8_str(), TrackNumber, Index, -1, &ErrInfo);
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#else
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AudioSource = FFMS_CreateAudioSource(FileNameShort.utf8_str(), TrackNumber, Index, &ErrInfo);
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#endif
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FFMS_DestroyIndex(Index);
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Index = NULL;
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if (!AudioSource) {
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throw AudioOpenError(std::string("Failed to open audio track: %s") + ErrInfo.Buffer);
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}
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const FFMS_AudioProperties AudioInfo = *FFMS_GetAudioProperties(AudioSource);
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channels = AudioInfo.Channels;
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sample_rate = AudioInfo.SampleRate;
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num_samples = AudioInfo.NumSamples;
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if (channels <= 0 || sample_rate <= 0 || num_samples <= 0)
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throw AudioOpenError("sanity check failed, consult your local psychiatrist");
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// FIXME: use the actual sample format too?
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// why not just bits_per_sample/8? maybe there's some oddball format with half bytes out there somewhere...
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switch (AudioInfo.BitsPerSample) {
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case 8: bytes_per_sample = 1; break;
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case 16: bytes_per_sample = 2; break;
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case 24: bytes_per_sample = 3; break;
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case 32: bytes_per_sample = 4; break;
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default:
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throw AudioOpenError("unknown or unsupported sample format");
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}
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}
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/// @brief Destructor
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///
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Audio::~Audio() {
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Close();
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}
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/// @brief Clean up
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///
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void FFmpegSourceAudioProvider::Close() {
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if (AudioSource) FFMS_DestroyAudioSource(AudioSource);
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#ifdef WIN32
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if (COMInited)
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CoUninitialize();
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#endif
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}
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/// @brief Get audio
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/// @param Buf
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/// @param Start
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/// @param Count
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///
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void Audio::GetAudio(void *Buf, int64_t Start, int64_t Count) const {
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if (FFMS_GetAudio(AudioSource, Buf, Start, Count, &ErrInfo)) {
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throw AudioDecodeError(std::string("Failed to get audio samples: ") + ErrInfo.Buffer);
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}
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}
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} // namespace ffms
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57
aegisub/libaegisub/common/ffms_audio.h
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57
aegisub/libaegisub/common/ffms_audio.h
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@ -0,0 +1,57 @@
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// Copyright (c) 2008-2009, Karl Blomster <thefluff@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// $Id$
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/// @file ffms_audio.h
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/// @brief FFmpegSource Audio support.
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/// @ingroup fmms audio
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#include "../../libffms/include/ffms.h"
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#include <libaegisub/exception.h>
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#ifndef AGI_PRE
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#ifdef WIN32
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#include <objbase.h>
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#endif
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#include <map>
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#endif
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namespace ffms {
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class Audio {
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FFMS_AudioSource *AudioSource; ///< audio source object
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bool COMInited; ///< COM initialization state
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mutable char FFMSErrMsg[1024]; ///< FFMS error message
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mutable FFMS_ErrorInfo ErrInfo; ///< FFMS error codes/messages
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void Close();
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void LoadAudio(std::string filename);
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Audio(std::string filename);
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virtual ~Audio();
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/// @brief Checks sample endianness
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/// @return Returns true.
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/// FFMS always delivers native endian samples.
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bool AreSamplesNativeEndian() const { return true; }
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bool NeedsCache() const { return true; }
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virtual void GetAudio(void *buf, int64_t start, int64_t count) const;
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};
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} // namespace ffms
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