Mercurial > repos > blastem
diff render_sdl.c @ 1117:928a65750345
Initial support for Genesis/Megadrive PBC mode. VDP still needs Mode 4 to be useful.
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Thu, 22 Dec 2016 19:51:25 -0800 |
| parents | 22e87b739ad6 |
| children | e758ddbf0624 |
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--- a/render_sdl.c Thu Dec 22 10:51:33 2016 -0800 +++ b/render_sdl.c Thu Dec 22 19:51:25 2016 -0800 @@ -44,6 +44,7 @@ static SDL_cond * psg_cond; static SDL_cond * ym_cond; static uint8_t quitting = 0; +static uint8_t ym_enabled = 1; static void audio_callback(void * userdata, uint8_t *byte_stream, int len) { @@ -61,26 +62,45 @@ current_psg = NULL; SDL_CondSignal(psg_cond); } - if (!ym_buf) { + if (ym_enabled && !ym_buf) { ym_buf = current_ym; current_ym = NULL; SDL_CondSignal(ym_cond); } - if (!quitting && (!psg_buf || !ym_buf)) { + if (!quitting && (!psg_buf || (ym_enabled && !ym_buf))) { SDL_CondWait(audio_ready, audio_mutex); } - } while(!quitting && (!psg_buf || !ym_buf)); + } while(!quitting && (!psg_buf || (ym_enabled && !ym_buf))); local_quit = quitting; SDL_UnlockMutex(audio_mutex); if (!local_quit) { - for (int i = 0; i < samples; i++) { - *(stream++) = psg_buf[i] + *(ym_buf++); - *(stream++) = psg_buf[i] + *(ym_buf++); + if (ym_enabled) { + for (int i = 0; i < samples; i++) + { + *(stream++) = psg_buf[i] + *(ym_buf++); + *(stream++) = psg_buf[i] + *(ym_buf++); + } + } else { + for (int i = 0; i < samples; i++) + { + *(stream++) = psg_buf[i]; + *(stream++) = psg_buf[i]; + } } } } +void render_disable_ym() +{ + ym_enabled = 0; +} + +void render_enable_ym() +{ + ym_enabled = 1; +} + static void render_close_audio() { SDL_LockMutex(audio_mutex);