forked from mia/Aegisub
158 lines
4.1 KiB
C++
158 lines
4.1 KiB
C++
// Copyright (c) 2005-2006, Rodrigo Braz Monteiro, Fredrik Mellbin
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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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///////////
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// Headers
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#include <wx/wxprec.h>
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#include <wx/filename.h>
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#include "audio_provider_lavc.h"
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#include "options.h"
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//////////////
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// Constructor
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LAVCAudioProvider::LAVCAudioProvider(wxString _filename) {
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// Set filename
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filename = _filename;
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// Init lavc variables
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codecContext = NULL;
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formatContext = NULL;
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codec = NULL;
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stream = NULL;
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frame = NULL;
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// Register types
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static bool avRegistered = false;
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if (!avRegistered) {
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av_register_all();
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avRegistered = true;
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}
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// Load audio
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LoadAudio(filename);
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}
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//////////////
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// Destructor
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LAVCAudioProvider::~LAVCAudioProvider() {
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Close();
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}
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////////////////
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// Get filename
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wxString LAVCAudioProvider::GetFilename() {
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return filename;
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}
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//////////////
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// Load audio
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void LAVCAudioProvider::LoadAudio(wxString file) {
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// Close first
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Close();
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try {
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// Open file
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int result = 0;
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result = av_open_input_file(&formatContext,filename.mb_str(wxConvLocal),NULL,0,NULL);
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if (result != 0) throw _T("Failed opening file.");
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// Get stream info
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result = av_find_stream_info(formatContext);
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if (result < 0) throw _T("Unable to read stream info");
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// Find audio stream
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audStream = -1;
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codecContext = NULL;
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for (int i=0;i<formatContext->nb_streams;i++) {
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codecContext = formatContext->streams[i]->codec;
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if (codecContext->codec_type == CODEC_TYPE_AUDIO) {
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stream = formatContext->streams[i];
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audStream = i;
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break;
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}
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}
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if (audStream == -1) throw _T("Could not find an audio stream");
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// Find codec
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codec = avcodec_find_decoder(codecContext->codec_id);
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if (!codec) throw _T("Could not find suitable audio decoder");
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// Enable truncation
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//if (codec->capabilities & CODEC_CAP_TRUNCATED) codecContext->flags |= CODEC_FLAG_TRUNCATED;
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// Open codec
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result = avcodec_open(codecContext,codec);
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if (result < 0) throw _T("Failed to open audio decoder");
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// TODO: rest of opening
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}
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// Catch errors
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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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// Unload
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void LAVCAudioProvider::Close() {
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// Clean frame
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if (frame) av_free(frame);
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frame = NULL;
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// Close codec context
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if (codec && codecContext) avcodec_close(codecContext);
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codecContext = NULL;
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codec = NULL;
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// Close format context
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if (formatContext) av_close_input_file(formatContext);
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formatContext = NULL;
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}
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/////////////
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// Get audio
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void LAVCAudioProvider::GetAudio(void *buf, __int64 start, __int64 count) {
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// TODO
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}
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