mirror of https://github.com/odrling/Aegisub
112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
// Copyright (c) 2007, Niels Martin Hansen
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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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/// @file audio_player_openal.h
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/// @see audio_player_openal.cpp
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/// @ingroup audio_output
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///
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#ifdef WITH_OPENAL
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#include "include/aegisub/audio_player.h"
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#include "include/aegisub/audio_provider.h"
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#ifdef __WINDOWS__
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#include <al.h>
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#include <alc.h>
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#elif defined(__APPLE__)
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#include <OpenAL/al.h>
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#include <OpenAL/alc.h>
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#else
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#include <AL/al.h>
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#include <AL/alc.h>
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#endif
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#include <vector>
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#include <wx/timer.h>
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class OpenALPlayer final : public AudioPlayer, wxTimer {
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/// Number of OpenAL buffers to use
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static const ALsizei num_buffers = 8;
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bool playing = false; ///< Is audio currently playing?
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float volume = 1.f; ///< Current audio volume
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ALsizei samplerate; ///< Sample rate of the audio
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int bpf; ///< Bytes per frame
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int64_t start_frame = 0; ///< First frame of playbacka
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int64_t cur_frame = 0; ///< Next frame to write to playback buffers
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int64_t end_frame = 0; ///< Last frame to play
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ALCdevice *device = nullptr; ///< OpenAL device handle
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ALCcontext *context = nullptr; ///< OpenAL sound context
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ALuint buffers[num_buffers]; ///< OpenAL sound buffers
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ALuint source = 0; ///< OpenAL playback source
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/// Index into buffers, first free (unqueued) buffer to be filled
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ALsizei buf_first_free = 0;
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/// Index into buffers, first queued (non-free) buffer
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ALsizei buf_first_queued = 0;
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/// Number of free buffers
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ALsizei buffers_free = 0;
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/// Number of buffers which have been fully played since playback was last started
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ALsizei buffers_played = 0;
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wxStopWatch playback_segment_timer;
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/// Buffer to decode audio into
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std::vector<char> decode_buffer;
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/// Fill count OpenAL buffers
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void FillBuffers(ALsizei count);
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protected:
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/// wxTimer override to periodically fill available buffers
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void Notify() override;
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public:
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OpenALPlayer(AudioProvider *provider);
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~OpenALPlayer();
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void Play(int64_t start,int64_t count) override;
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void Stop() override;
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bool IsPlaying() override { return playing; }
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int64_t GetEndPosition() override { return end_frame; }
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int64_t GetCurrentPosition() override;
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void SetEndPosition(int64_t pos) override;
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void SetVolume(double vol) override { volume = vol; }
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};
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#endif
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