make OSS detect blocking, adjust audio API

[picodrive.git] / platform / linux / emu.c

diff --git a/platform/linux/emu.c b/platform/linux/emu.c
index f5a21c3..aef2197 100644 (file)
--- a/platform/linux/emu.c
+++ b/platform/linux/emu.c
@@ -210,47 +210,27 @@ void plat_update_volume(int has_changed, int is_up)
 \r
 void pemu_forced_frame(int no_scale, int do_emu)\r
 {\r
-       int po_old = PicoOpt;\r
-\r
-       memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);\r
-\r
-       PicoOpt &= ~POPT_ALT_RENDERER;\r
-       PicoOpt |= POPT_ACC_SPRITES;\r
-       if (!no_scale)\r
-               PicoOpt |= POPT_EN_SOFTSCALE;\r
-\r
-       PicoDrawSetOutFormat(PDF_RGB555, 1);\r
        PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);\r
        PicoDraw32xSetFrameMode(0, 0);\r
-\r
+       PicoDrawSetCallbacks(NULL, NULL);\r
        Pico.m.dirtyPal = 1;\r
-       if (do_emu)\r
-               PicoFrame();\r
-       else\r
-               PicoFrameDrawOnly();\r
+\r
+       emu_cmn_forced_frame(no_scale, do_emu);\r
 \r
        g_menubg_src_ptr = g_screen_ptr;\r
-       PicoOpt = po_old;\r
 }\r
 \r
-static void updateSound(int len)\r
+static void oss_write_nonblocking(int len)\r
 {\r
-       len <<= 1;\r
-       if (PicoOpt & POPT_EN_STEREO)\r
-               len <<= 1;\r
-\r
+       // sndout_oss_can_write() is not reliable, only use with no_frmlimit\r
        if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))\r
                return;\r
 \r
-       /* avoid writing audio when lagging behind to prevent audio lag */\r
-       if (PicoSkipFrame != 2)\r
-               sndout_oss_write(PsndOut, len);\r
+       sndout_oss_write_nb(PsndOut, len);\r
 }\r
 \r
 void pemu_sound_start(void)\r
 {\r
-       int target_fps = Pico.m.pal ? 50 : 60;\r
-\r
        PsndOut = NULL;\r
 \r
        if (currentConfig.EmuOpt & EOPT_EN_SOUND)\r
@@ -263,7 +243,7 @@ void pemu_sound_start(void)
                        PsndRate, PsndLen, is_stereo, Pico.m.pal);\r
                sndout_oss_start(PsndRate, is_stereo, 1);\r
                sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
-               PicoWriteSound = updateSound;\r
+               PicoWriteSound = oss_write_nonblocking;\r
                plat_update_volume(0, 0);\r
                memset(sndBuffer, 0, sizeof(sndBuffer));\r
                PsndOut = sndBuffer;\r