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Refactored sound code - slight speedup.

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This commit is contained in:
TomW 2016-02-10 20:49:28 +00:00
commit 3a57341837
33 changed files with 706 additions and 535 deletions
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29
src/sound_speaker.c
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@ -11,31 +11,42 @@ static int speaker_pos = 0;
int speaker_gated = 0;
int speaker_enable = 0, was_speaker_enable = 0;
static void speaker_poll(void *p)
void speaker_update()
{
if (speaker_pos >= SOUNDBUFLEN) return;
int16_t val;
// printf("SPeaker - %i %i %i %02X\n",speakval,gated,speakon,pit.m[2]);
if (speaker_gated && was_speaker_enable)
{
if (!pit.m[2] || pit.m[2]==4)
speaker_buffer[speaker_pos] = speakval;
val = speakval;
else if (pit.l[2] < 0x40)
speaker_buffer[speaker_pos] = 0xa00;
val = 0xa00;
else
speaker_buffer[speaker_pos] = speakon ? 0x1400 : 0;
val = speakon ? 0x1400 : 0;
}
else
speaker_buffer[speaker_pos] = was_speaker_enable ? 0x1400 : 0;
speaker_pos++;
val = was_speaker_enable ? 0x1400 : 0;
if (!speaker_enable)
was_speaker_enable = 0;
if (speaker_pos != sound_pos_global)
speaker_buffer[speaker_pos] = val;
if (!speaker_gated)
val = 0;
for (; speaker_pos < sound_pos_global; speaker_pos++)
speaker_buffer[speaker_pos] = val;
}
static void speaker_get_buffer(int16_t *buffer, int len, void *p)
{
int c;
speaker_update();
if (!speaker_mute)
{
for (c = 0; c < len * 2; c++)
@ -47,6 +58,6 @@ static void speaker_get_buffer(int16_t *buffer, int len, void *p)
void speaker_init()
{
sound_add_handler(speaker_poll, speaker_get_buffer, NULL);
sound_add_handler(speaker_get_buffer, NULL);
speaker_mute = 0;
}