Initial Commit

2019-09-01 21:43:40 +01:00
commit 56b69d2281
176 changed files with 41262 additions and 0 deletions
--- a/seal-hack/examples/example6.c
+++ b/seal-hack/examples/example6.c
@@ -0,0 +1,100 @@
+/* example6.c - play a streamed sample (sine wave) using triple buffering */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <audio.h>
+
+#if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__WATCOMC__) || defined(__DJGPP__)
+#include <conio.h>
+#else
+#define kbhit() 0
+#endif
+
+int main(void)
+{
+    AUDIOINFO info;
+    AUDIOCAPS caps;
+    AUDIOWAVE wave;
+    HAC voice;
+    int i;
+    float t, dt;
+    long position, chunkSize, chunkPosition;
+
+    /* initialize library */
+    AInitialize();
+
+    /* open audio device */
+    info.nDeviceId = AUDIO_DEVICE_MAPPER;
+    info.wFormat = AUDIO_FORMAT_16BITS | AUDIO_FORMAT_STEREO;
+    info.nSampleRate = 44100;
+    AOpenAudio(&info);
+
+    /* show device name */
+    AGetAudioDevCaps(info.nDeviceId, &caps);
+    printf("%s detected. Press any key to exit.\n", caps.szProductName);
+
+    /* open audio voice */
+    AOpenVoices(1);
+    ACreateAudioVoice(&voice);
+    ASetVoiceVolume(voice, 64);
+    ASetVoicePanning(voice, 128);
+
+    /* setup buffer length to 1/60th of a second */
+    chunkPosition = 0;
+    chunkSize = info.nSampleRate / 60;
+
+    /* create a looped sound buffer of 3 x 1/60th secs */
+    wave.nSampleRate = info.nSampleRate;
+    wave.dwLength = 3 * chunkSize;
+    wave.dwLoopStart = 0;
+    wave.dwLoopEnd = wave.dwLength;
+    wave.wFormat = AUDIO_FORMAT_8BITS | AUDIO_FORMAT_MONO | AUDIO_FORMAT_LOOP;
+    ACreateAudioData(&wave);
+
+    /* clean up sound buffer */
+    memset(wave.lpData, 0, wave.dwLength);
+    AWriteAudioData(&wave, 0, wave.dwLength);
+
+    /* setup 200 Hz sine wave parameters */
+    t = 0.0;
+    dt = 2.0 * M_PI * 200.0 / wave.nSampleRate;
+
+    printf("%d-bit %s %u Hz, buffer size = %ld, chunk size = %ld\n",
+           info.wFormat & AUDIO_FORMAT_16BITS ? 16 : 8,
+           info.wFormat & AUDIO_FORMAT_STEREO ? "stereo" : "mono",
+           info.nSampleRate, wave.dwLength, chunkSize);
+ 
+    /* start playing the sound buffer */ 
+    APlayVoice(voice, &wave);
+
+    while (!kbhit()) {
+      /* do not fill more than 'chunkSize' samples */
+      AUpdateAudioEx(chunkSize);
+
+      /* update the chunk of samples at 'chunkPosition' */
+      AGetVoicePosition(voice, &position);
+      if (position < chunkPosition || position >= chunkPosition + chunkSize) {
+        for (i = 0; i < chunkSize; i++)
+          wave.lpData[chunkPosition++] = 64.0 * sin(t += dt);
+        AWriteAudioData(&wave, chunkPosition - chunkSize, chunkSize);
+        if (chunkPosition >= wave.dwLength)
+          chunkPosition = 0;
+      }
+    }
+
+    /* stop playing the buffer */
+    AStopVoice(voice);
+
+    /* release sound buffer */
+    ADestroyAudioData(&wave);
+
+    /* release audio voices */
+    ADestroyAudioVoice(voice);
+    ACloseVoices();
+
+    /* close audio device */
+    ACloseAudio();
+    return 0;
+}