forked from mia/Aegisub
70ba90f024
Remove pointless volatile modifiers from member variables (there aren't even any threads involved). Eliminate all heap memory allocation during playback. Move comments into the doxygen comments and add some more. Throw typed exceptions. Originally committed to SVN as r5889.
131 lines
4 KiB
C++
131 lines
4 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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//
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// $Id$
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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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#ifndef AGI_PRE
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#include <vector>
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#endif
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#include <libaegisub/exception.h>
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DEFINE_SIMPLE_EXCEPTION_NOINNER(OpenALException, agi::Exception, "audio/player/openal/generic")
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/// DOCME
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/// @class OpenALPlayer
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/// @brief DOCME
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///
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/// DOCME
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class OpenALPlayer : 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 open; ///< Is the player ready to play?
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bool playing; ///< Is audio currently playing?
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float volume; ///< 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; ///< First frame of playbacka
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int64_t cur_frame; ///< Next frame to write to playback buffers
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int64_t end_frame; ///< Last frame to play
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ALCdevice *device; ///< OpenAL device handle
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ALCcontext *context; ///< OpenAL sound context
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ALuint buffers[num_buffers]; ///< OpenAL sound buffers
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ALuint source; ///< 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;
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/// Index into buffers, first queued (non-free) buffer
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ALsizei buf_first_queued;
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/// Number of free buffers
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ALsizei buffers_free;
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/// Number of buffers which have been fully played since playback was last started
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ALsizei buffers_played;
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/// DOCME
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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();
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public:
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OpenALPlayer();
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~OpenALPlayer();
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void OpenStream();
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void CloseStream();
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void Play(int64_t start,int64_t count);
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void Stop(bool timerToo=true);
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bool IsPlaying() { return playing; }
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int64_t GetStartPosition() { return start_frame; }
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int64_t GetEndPosition() { return end_frame; }
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int64_t GetCurrentPosition();
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void SetEndPosition(int64_t pos);
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void SetCurrentPosition(int64_t pos);
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void SetVolume(double vol) { volume = vol; }
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double GetVolume() { return volume; }
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};
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#endif
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