158 lines
No EOL
5 KiB
C++
158 lines
No EOL
5 KiB
C++
// Copyright (c) 2008, Karl Blomster
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://aegisub.cellosoft.com
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// Contact: mailto:zeratul@cellosoft.com
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//
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#ifdef WITH_FFMPEGSOURCE
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///////////
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// Headers
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#include "audio_provider_ffmpegsource.h"
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///////////
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// Constructor
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FFmpegSourceAudioProvider::FFmpegSourceAudioProvider(Aegisub::String filename) {
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FFMS_Init();
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MsgSize = sizeof(FFMSErrMsg);
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AudioSource = NULL;
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Index = NULL;
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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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///////////
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// Load audio file
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void FFmpegSourceAudioProvider::LoadAudio(Aegisub::String filename) {
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// clean up
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Close();
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wxString FileNameWX(filename.c_str(), wxConvUTF8);
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// generate a default name for the cache file
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wxString CacheName(filename.c_str());
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CacheName.append(_T(".ffindex"));
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FrameIndex *Index;
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Index = FFMS_ReadIndex(CacheName.char_str(), FFMSErrMsg, MsgSize);
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if (Index == NULL) {
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// index didn't exist or was invalid, we'll have to (re)create it
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IndexingProgressDialog Progress;
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Progress.IndexingCanceled = false;
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Progress.ProgressDialog = new DialogProgress(NULL, _("Indexing"), &Progress.IndexingCanceled, _("Indexing audio file"), 0, 1);
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Progress.ProgressDialog->Show();
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Progress.ProgressDialog->SetProgress(0,1);
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// index all audio tracks
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Index = FFMS_MakeIndex(FileNameWX.char_str(), FFMSTrackMaskAll, CacheName.char_str(), FFmpegSourceProvider::UpdateIndexingProgress, &Progress, FFMSErrMsg, MsgSize);
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if (Index == NULL) {
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Progress.ProgressDialog->Destroy();
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MsgString.Printf(_T("FFmpegSource audio provider: %s"), FFMSErrMsg);
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throw MsgString;
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}
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Progress.ProgressDialog->Destroy();
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// write index to disk for later use
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if (FFMS_WriteIndex(CacheName.char_str(), Index, FFMSErrMsg, MsgSize)) {
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MsgString.Printf(_T("FFmpegSource audio provider: %s"), FFMSErrMsg);
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throw MsgString;
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}
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}
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// FIXME: provide a way to choose which audio track to load?
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AudioSource = FFMS_CreateAudioSource(FileNameWX.char_str(), FFMSFirstSuitableTrack, Index, FFMSErrMsg, MsgSize);
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if (!AudioSource) {
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MsgString.Printf(_T("FFmpegSource audio provider: %s"), FFMSErrMsg);
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throw MsgString;
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}
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const AudioProperties AudioInfo = *FFMS_GetAudioProperties(AudioSource);
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if (AudioInfo.Float)
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throw _T("FFmpegSource audio provider: don't know what to do with floating point audio");
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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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// 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 _T("FFmpegSource audio provider: unknown or unsupported sample format");
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}
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}
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///////////
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// Destructor
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FFmpegSourceAudioProvider::~FFmpegSourceAudioProvider() {
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Close();
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}
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///////////
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// Clean up
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void FFmpegSourceAudioProvider::Close() {
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if (AudioSource)
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FFMS_DestroyAudioSource(AudioSource);
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AudioSource = NULL;
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if (Index)
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FFMS_DestroyFrameIndex(Index);
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Index = NULL;
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}
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///////////
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// Get audio
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void FFmpegSourceAudioProvider::GetAudio(void *Buf, int64_t Start, int64_t Count) {
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if (FFMS_GetAudio(AudioSource, Buf, Start, Count, FFMSErrMsg, MsgSize)) {
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MsgString.Printf(_T("FFmpegSource audio provider: %s"), FFMSErrMsg);
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throw MsgString;
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}
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}
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#endif /* WITH_FFMPEGSOURCE */ |