「.ogg再生(OpenAL)」の編集履歴（バックアップ）一覧はこちら

「.ogg再生(OpenAL)」(2012/12/18 (火) 15:44:45) の最新版変更点

追加された行は緑色になります。

削除された行は赤色になります。

<p><strong>OpenAL　で　.ogg　を再生します。</strong></p>
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<p>#pragma comment ( lib, "libogg_static.lib" )<br />
#pragma comment ( lib, "libvorbis_static.lib" )<br />
#pragma comment ( lib, "libvorbisfile_static.lib" )<br />
#pragma comment ( lib, "OpenAL32.lib" )<br />
#include "vorbis/vorbisfile.h"<br />
#include &lt;windows.h&gt;</p>
<p>#include &lt;al.h&gt;<br />
#include &lt;alc.h&gt;<br />
#include &lt;stdio.h&gt;<br />
#define NUM_BUFFERS 32<br />
#define BUFFER_SIZE 4096<br />
void main()<br />
{<br />
    ALCdevice *device;<br />
    ALCcontext *context;<br />
    ALuint source, buffer;<br />
    ALint state, num;<br />
    device = alcOpenDevice(NULL);<br />
    context = alcCreateContext(device, NULL);<br />
    alcMakeContextCurrent(context);<br />
    alGenSources(1, &amp;source);<br />
    FILE *fp;<br />
 fopen_s(&amp;fp,"sample.ogg", "rb");<br />
    OggVorbis_File vf;<br />
    int current = 0;<br />
    ov_open(fp, &amp;vf, NULL, 0);<br />
    while(1) {<br />
  char data[BUFFER_SIZE];<br />
        long size = ov_read(&amp;vf, data, sizeof(data), 0, 2, 1,
&amp;current);<br />
        vorbis_info *info = ov_info(&amp;vf, -1);<br />
        ALenum format = info-&gt;channels == 1 ? AL_FORMAT_MONO16 :
AL_FORMAT_STEREO16;<br />
        if (size &lt;= 0) {<br />
            break;<br />
        }<br />
        alGetSourcei(source, AL_BUFFERS_QUEUED, &amp;num);<br />
        if (num &lt; NUM_BUFFERS) {<br />
            alGenBuffers(1, &amp;buffer);<br />
        } else {<br />
            alGetSourcei(source, AL_SOURCE_STATE, &amp;state);<br />
            if (state != AL_PLAYING) {<br />
                alSourcePlay(source);<br />
            }<br />
            while (alGetSourcei(source, AL_BUFFERS_PROCESSED, &amp;num), num ==
0) {<br />
                Sleep(100);<br />
            }<br />
            alSourceUnqueueBuffers(source, 1, &amp;buffer);<br />
        }<br />
        alBufferData(buffer, format, data, size, info-&gt;rate);<br />
        alSourceQueueBuffers(source, 1, &amp;buffer);<br />
    }<br />
    ov_clear(&amp;vf);<br />
    alGetSourcei(source, AL_SOURCE_STATE, &amp;state);<br />
    if (state != AL_PLAYING) {<br />
        alSourcePlay(source);<br />
    }<br />
    while (alGetSourcei(source, AL_SOURCE_STATE, &amp;state), state ==
AL_PLAYING) {<br />
        Sleep(100);<br />
    }<br />
    while (alGetSourcei(source, AL_BUFFERS_PROCESSED, &amp;num), num &gt; 0)
{<br />
        alSourceUnqueueBuffers(source, 1, &amp;buffer);<br />
        alDeleteBuffers(1, &amp;buffer);<br />
    }<br />
    alDeleteSources(1, &amp;source);<br />
    alcMakeContextCurrent(NULL);<br />
    alcDestroyContext(context);<br />
    alcCloseDevice(device);<br />
    return;<br />
}</p>
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