226 lines
6.7 KiB
C++
226 lines
6.7 KiB
C++
// Copyright (c) 2005-2006, Rodrigo Braz Monteiro
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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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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file audio_provider.cpp
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/// @brief Baseclass for audio providers
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/// @ingroup audio_input
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///
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#include "config.h"
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#ifndef AGI_PRE
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#include <wx/thread.h>
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#endif
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#include "audio_controller.h"
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#ifdef WITH_AVISYNTH
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#include "audio_provider_avs.h"
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#endif
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#include "audio_provider_convert.h"
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#ifdef WITH_FFMS2
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#include "audio_provider_ffmpegsource.h"
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#endif
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#include "audio_provider_hd.h"
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#include "audio_provider_lock.h"
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#include "audio_provider_pcm.h"
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#include "audio_provider_ram.h"
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#include "compat.h"
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#include "dialog_progress.h"
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#include "frame_main.h"
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#include "main.h"
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#include <libaegisub/log.h>
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void AudioProvider::GetAudioWithVolume(void *buf, int64_t start, int64_t count, double volume) const {
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GetAudio(buf,start,count);
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if (volume == 1.0) return;
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if (bytes_per_sample == 2) {
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// Read raw samples
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short *buffer = (short*) buf;
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int value;
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// Modify
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for (size_t i = 0; i < (size_t)count; ++i) {
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value = (int)(buffer[i]*volume+0.5);
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if (value < -0x8000) value = -0x8000;
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if (value > 0x7FFF) value = 0x7FFF;
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buffer[i] = value;
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}
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}
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}
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void AudioProvider::GetAudio(void *buf, int64_t start, int64_t count) const {
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if (start+count > num_samples) {
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int64_t oldcount = count;
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count = num_samples-start;
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if (count < 0) count = 0;
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// Fill beyond with zero
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if (bytes_per_sample == 1) {
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char *temp = (char *) buf;
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for (int i=count;i<oldcount;i++) {
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temp[i] = 0;
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}
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}
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if (bytes_per_sample == 2) {
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short *temp = (short *) buf;
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for (int i=count;i<oldcount;i++) {
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temp[i] = 0;
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}
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}
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}
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if (start + count > num_samples) {
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int64_t zero_count = std::min(count, start + count - num_samples);
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count -= zero_count;
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char *zero_buf = static_cast<char *>(buf) + count * bytes_per_sample * channels;
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if (bytes_per_sample == 1)
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// 8 bit formats are usually unsigned with bias 127
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memset(zero_buf, 127, zero_count * channels);
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else
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// While everything else is signed
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memset(zero_buf, 0, zero_count * bytes_per_sample * channels);
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}
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if (count > 0) {
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try {
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FillBuffer(buf, start, count);
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}
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catch (AudioDecodeError const& e) {
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LOG_E("audio_provider") << e.GetChainedMessage();
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memset(buf, 0, count*bytes_per_sample);
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return;
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}
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catch (...) {
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// FIXME: Poor error handling though better than none, to patch issue #800.
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// Just return blank audio if real provider fails.
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LOG_E("audio_provider") << "Unknown audio decoding error";
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memset(buf, 0, count*bytes_per_sample);
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return;
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}
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}
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}
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AudioProvider *AudioProviderFactory::GetProvider(wxString const& filename, int cache) {
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AudioProvider *provider = 0;
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bool found_file = false;
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bool found_audio = false;
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std::string msg;
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if (!OPT_GET("Provider/Audio/PCM/Disable")->GetBool()) {
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// Try a PCM provider first
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try {
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provider = CreatePCMAudioProvider(filename);
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LOG_D("audio_provider") << "Using PCM provider";
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}
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catch (agi::FileNotFoundError const& err) {
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msg = "PCM audio provider: " + err.GetMessage() + " not found.\n";
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}
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catch (agi::AudioOpenError const& err) {
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found_file = true;
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msg += err.GetChainedMessage() + "\n";
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}
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}
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if (!provider) {
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std::vector<std::string> list = GetClasses(OPT_GET("Audio/Provider")->GetString());
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if (list.empty()) throw agi::NoAudioProvidersError("No audio providers are available.", 0);
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for (size_t i = 0; i < list.size() ; ++i) {
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try {
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provider = Create(list[i], filename);
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if (provider) {
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LOG_D("audio_provider") << "Using audio provider: " << list[i];
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break;
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}
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}
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catch (agi::FileNotFoundError const& err) {
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msg += list[i] + ": " + err.GetMessage() + " not found.\n";
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}
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catch (agi::AudioDataNotFoundError const& err) {
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found_file = true;
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msg += list[i] + ": " + err.GetChainedMessage() + "\n";
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}
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catch (agi::AudioOpenError const& err) {
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found_audio = true;
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found_file = true;
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msg += list[i] + ": " + err.GetChainedMessage() + "\n";
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}
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}
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}
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if (!provider) {
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if (found_audio)
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throw agi::AudioProviderOpenError(msg, 0);
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if (found_file)
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throw agi::AudioDataNotFoundError(msg, 0);
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throw agi::FileNotFoundError(STD_STR(filename));
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}
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bool needsCache = provider->NeedsCache();
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// Give it a converter if needed
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if (provider->GetBytesPerSample() != 2 || provider->GetSampleRate() < 32000 || provider->GetChannels() != 1)
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provider = CreateConvertAudioProvider(provider);
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// Change provider to RAM/HD cache if needed
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if (cache == -1) cache = OPT_GET("Audio/Cache/Type")->GetInt();
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if (!cache || !needsCache) {
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return new LockAudioProvider(provider);
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}
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DialogProgress progress(wxGetApp().frame, _("Load audio"));
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// Convert to RAM
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if (cache == 1) return new RAMAudioProvider(provider, &progress);
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// Convert to HD
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if (cache == 2) return new HDAudioProvider(provider, &progress);
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throw agi::AudioCacheOpenError("Unknown caching method", 0);
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}
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/// @brief Register all providers
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///
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void AudioProviderFactory::RegisterProviders() {
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#ifdef WITH_AVISYNTH
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Register<AvisynthAudioProvider>("Avisynth");
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#endif
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#ifdef WITH_FFMS2
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Register<FFmpegSourceAudioProvider>("FFmpegSource");
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#endif
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}
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template<> AudioProviderFactory::map *FactoryBase<AudioProvider *(*)(wxString)>::classes = NULL;
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