forked from mia/Aegisub
116 lines
3.6 KiB
C
116 lines
3.6 KiB
C
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// 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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// -----------------------------------------------------------------------------
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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:jiifurusu@gmail.com
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//
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#ifdef WITH_ALSA
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///////////
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// Headers
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#include <wx/wxprec.h>
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#include "audio_player.h"
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#include "audio_provider.h"
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#include "utils.h"
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#include "main.h"
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#include "frame_main.h"
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#include "audio_player.h"
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#include <alsa/asoundlib.h>
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#include "options.h"
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///////////////
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// Alsa player
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class AlsaPlayer : public AudioPlayer {
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private:
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bool open;
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volatile bool playing;
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volatile float volume;
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volatile unsigned long start_frame; // first frame of playback
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volatile unsigned long cur_frame; // last written frame + 1
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volatile unsigned long end_frame; // last frame to play
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unsigned long bpf; // bytes per frame
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AudioProvider *provider;
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snd_pcm_t *pcm_handle; // device handle
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snd_pcm_stream_t stream; // stream direction
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snd_async_handler_t *pcm_callback;
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snd_pcm_format_t sample_format;
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unsigned int rate; // sample rate of audio
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unsigned int real_rate; // actual sample rate played back
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unsigned int period_len; // length of period in microseconds
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unsigned int buflen; // length of buffer in microseconds
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snd_pcm_uframes_t period; // size of period in frames
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snd_pcm_uframes_t bufsize; // size of buffer in frames
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void SetUpHardware();
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void SetUpAsync();
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static void async_write_handler(snd_async_handler_t *pcm_callback);
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public:
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AlsaPlayer();
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~AlsaPlayer();
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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();
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int64_t GetStartPosition();
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int64_t GetEndPosition();
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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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///////////
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// Factory
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class AlsaPlayerFactory : public AudioPlayerFactory {
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public:
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AudioPlayer *CreatePlayer() { return new AlsaPlayer(); }
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AlsaPlayerFactory() : AudioPlayerFactory(_T("alsa")) {}
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};
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#endif
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