shithub: zelda3

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Remove constraint on sampling rate configuration (#79)

Sampling rate does not need to be a power of 2.

--- a/main.c

+++ b/main.c

@@ -170,9 +170,9 @@

       h = kRenderHeight / 2;

   }

-  // audio_freq: power of 2 [Values higher than 48000 generally should not be used]

+  // audio_freq: Use common sampling rates (see user config file. values higher than 48000 are not supported.)

   uint16 f = g_config.audio_freq;

-  if (f == 0 || f > 48000 || ((f & (f - 1)) != 0))

+  if (f == 0 || f > 48000)

       g_config.audio_freq = kDefaultFreq;

   // audio_channels: As of SDL 2.0, supported values are 1 (mono), 2 (stereo), 4 (quad), and 6 (5.1).

@@ -228,7 +228,7 @@

     printf("Failed to open audio device: %s\n", SDL_GetError());

     return 1;

   }

-  g_samples_per_block = (534 * g_config.audio_freq) / 32000;

+  g_samples_per_block = (534 * have.freq) / 32000;

   int16_t* audioBuffer = (int16_t * )malloc(g_samples_per_block * 2 * sizeof(int16));

   SDL_PauseAudioDevice(device, 0);

--- a/zelda3.ini

+++ b/zelda3.ini

@@ -14,7 +14,7 @@

 [Sound]

-# DSP frequency in samples per second (power of 2; e.g., 48000, 44100, 22050, 11025)

+# DSP frequency in samples per second (e.g. 48000, 44100, 32000, 22050, 11025)

 AudioFreq = 44100

 # number of separate sound channels (1=mono, 2=stereo)

 AudioChannels = 2