Apple-2-Tools/apple2ix
1
0
Fork 0
mirror of https://github.com/mauiaaron/apple2.git synced 2025-02-19 06:30:55 +00:00
Code Issues Projects Releases Wiki Activity

Enable semi-hackish codepath to reduce audio glitching on fast loading

Browse Source
This commit is contained in:
Aaron Culliney 2018-11-20 12:08:37 -08:00
parent ab0c796249
commit 3a35404fa3
1 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/audio/speaker.c
View File

@ -31,6 +31,9 @@
#define SPKR_SILENT_STEP 1
// TODO FIXME : still need to investigate better way to fix audio glitches when fast-loading (auto-adjusting speed) ...
#define HACKISHLY_REDUCE_AUDIO_GLITCHES_FOR_FAST_LOADING 1
static unsigned long bufferTotalSize = 0;
static unsigned long bufferSizeIdealMin = 0;
static unsigned long bufferSizeIdealMax = 0;
@ -203,9 +206,13 @@ static void _speaker_update(/*bool toggled*/) {
if (NUM_CHANNELS == 2) {
samples_buffer[samples_buffer_idx++] = speaker_data;
}
#if !defined(ANDROID)
#if HACKISHLY_REDUCE_AUDIO_GLITCHES_FOR_FAST_LOADING
if (speaker_going_silent && speaker_data) {
speaker_data -= SPKR_SILENT_STEP;
if (speaker_data < 0) {
speaker_data += SPKR_SILENT_STEP;
} else {
speaker_data -= SPKR_SILENT_STEP;
}
}
#endif
--num_samples;
@ -465,7 +472,7 @@ void speaker_flush(void) {
// After 0.2sec of //e cycles time set inactive flag (allows auto-switch to full speed for fast disk access)
speaker_recently_active = false;
} else if ((speaker_data != 0) && (cycles_count_total - cycles_quiet_time > cycles_diff)) {
#if defined(ANDROID)
#if !HACKISHLY_REDUCE_AUDIO_GLITCHES_FOR_FAST_LOADING
// OpenSLES seems to be able to pause output without the nasty pops that I hear with OpenAL on Linux
// desktop. So this speaker_going_silent hack is not needed. There is also a noticeable glitch in
// OpenSLES when this codepath is enabled.
@ -545,9 +552,10 @@ GLUE_C_READ(speaker_toggle)
if (!is_fullspeed) {
if (speaker_data == speaker_amplitude) {
#ifdef ANDROID
#if defined(ANDROID)
speaker_data = -speaker_amplitude;
#else
# error FIXME TODO : investigate whether this is still needed
speaker_data = 0;
#endif
} else {