unify helix mp3 code, some sound adjustments

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@726 be3aeb3a-fb24-0410-a615-afba39da0efa

diff --git a/platform/common/mp3.h b/platform/common/mp3.h
index aef65ff..31b8d6f 100644 (file)
--- a/platform/common/mp3.h
+++ b/platform/common/mp3.h
@@ -1,6 +1,6 @@
 
 #ifdef __GP2X__
 void mp3_update_local(int *buffer, int length, int stereo);
-void mp3_start_local(void);
+void mp3_start_play_local(FILE *f, int pos);
 #endif
 

diff --git a/platform/common/mp3_helix.c b/platform/common/mp3_helix.c
index 718c3de..5f58aa5 100644 (file)
--- a/platform/common/mp3_helix.c
+++ b/platform/common/mp3_helix.c
@@ -6,14 +6,22 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "../../pico/pico_int.h"
-#include "../../pico/sound/mix.h"
+#include <pico/pico_int.h>
+#include <pico/sound/mix.h>
 #include "helix/pub/mp3dec.h"
+#include "mp3.h"
 #include "lprintf.h"
 
 static HMP3Decoder mp3dec = 0;
+static FILE *mp3_current_file = NULL;
+static int mp3_file_len = 0, mp3_file_pos = 0;
 static int mp3_buffer_offs = 0;
+static unsigned char mp3_input_buffer[2*1024];
 
+#ifdef __GP2X__
+#define mp3_update mp3_update_local
+#define mp3_start_play mp3_start_play_local
+#endif
 
 static int find_sync_word(unsigned char *buf, int nBytes)
 {
@@ -41,7 +49,6 @@ static int find_sync_word(unsigned char *buf, int nBytes)
        return -1;
 }
 
-
 static int try_get_header(unsigned char *buff, MP3FrameInfo *fi)
 {
        int ret, offs1, offs = 0;
@@ -94,111 +101,54 @@ int mp3_get_bitrate(FILE *f, int len)
        return fi.bitrate / 1000;
 }
 
-
-#ifdef __GP2X__
-
-#include "../gp2x/code940/940shared.h"
-
-extern _940_ctl_t *shared_ctl;
-extern unsigned char *mp3_mem;
-
-static int mp3_decode(void)
-{
-       // tried copying this to cached mem, no improvement noticed
-       int mp3_offs = shared_ctl->mp3_offs;
-       unsigned char *readPtr = mp3_mem + mp3_offs;
-       int bytesLeft = shared_ctl->mp3_len - mp3_offs;
-       int offset; // frame offset from readPtr
-       int retries = 0, err;
-
-       if (bytesLeft <= 0) return 1; // EOF, nothing to do
-
-retry:
-       offset = find_sync_word(readPtr, bytesLeft);
-       if (offset < 0) {
-               shared_ctl->mp3_offs = shared_ctl->mp3_len;
-               return 1; // EOF
-       }
-       readPtr += offset;
-       bytesLeft -= offset;
-
-       err = MP3Decode(mp3dec, &readPtr, &bytesLeft, cdda_out_buffer, 0);
-       if (err) {
-               if (err == ERR_MP3_INDATA_UNDERFLOW) {
-                       shared_ctl->mp3_offs = shared_ctl->mp3_len; // EOF
-                       return 1;
-               } else if (err <= -6 && err >= -12) {
-                       // ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*
-                       // just try to skip the offending frame..
-                       readPtr++;
-                       bytesLeft--;
-                       if (retries++ < 2) goto retry;
-                       else lprintf("mp3 decode failed with %i after %i retries\n", err, retries);
-               }
-               shared_ctl->mp3_errors++;
-               shared_ctl->mp3_lasterr = err;
-       }
-       shared_ctl->mp3_offs = readPtr - mp3_mem;
-       return 0;
-}
-
-void mp3_start_local(void)
-{
-       // must re-init decoder for new track
-       if (mp3dec) MP3FreeDecoder(mp3dec);
-       mp3dec = MP3InitDecoder();
-
-       mp3_buffer_offs = 0;
-       mp3_decode();
-}
-
-#define mp3_update mp3_update_local
-
-#else // !__GP2X__
-
-static FILE *mp3_current_file = NULL;
-static int mp3_file_len = 0, mp3_file_pos = 0;
-static unsigned char mp3_input_buffer[2*1024];
-
 static int mp3_decode(void)
 {
        unsigned char *readPtr;
        int bytesLeft;
        int offset; // mp3 frame offset from readPtr
-       int err;
+       int had_err;
+       int err = 0;
 
        do
        {
-               if (mp3_file_pos >= mp3_file_len) return 1; // EOF, nothing to do
+               if (mp3_file_pos >= mp3_file_len)
+                       return 1; /* EOF, nothing to do */
 
                fseek(mp3_current_file, mp3_file_pos, SEEK_SET);
                bytesLeft = fread(mp3_input_buffer, 1, sizeof(mp3_input_buffer), mp3_current_file);
 
                offset = find_sync_word(mp3_input_buffer, bytesLeft);
                if (offset < 0) {
-                       //lprintf("find_sync_word (%i/%i) err %i\n", mp3_file_pos, mp3_file_len, offset);
+                       lprintf("find_sync_word (%i/%i) err %i\n", mp3_file_pos, mp3_file_len, offset);
                        mp3_file_pos = mp3_file_len;
                        return 1; // EOF
                }
                readPtr = mp3_input_buffer + offset;
                bytesLeft -= offset;
 
+               had_err = err;
                err = MP3Decode(mp3dec, &readPtr, &bytesLeft, cdda_out_buffer, 0);
                if (err) {
-                       //lprintf("MP3Decode err (%i/%i) %i\n", mp3_file_pos, mp3_file_len, err);
-                       if (err == ERR_MP3_INDATA_UNDERFLOW) {
+                       if (err == ERR_MP3_MAINDATA_UNDERFLOW && !had_err) {
+                               // just need another frame
+                               mp3_file_pos += readPtr - mp3_input_buffer;
+                               continue;
+                       }
+                       if (err == ERR_MP3_INDATA_UNDERFLOW && !had_err) {
                                if (offset == 0)
                                        // something's really wrong here, frame had to fit
                                        mp3_file_pos = mp3_file_len;
                                else
                                        mp3_file_pos += offset;
                                continue;
-                       } else if (err <= -6 && err >= -12) {
+                       }
+                       if (-12 <= err && err <= -6) {
                                // ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*
                                // just try to skip the offending frame..
                                mp3_file_pos += offset + 1;
                                continue;
                        }
+                       lprintf("MP3Decode err (%i/%i) %i\n", mp3_file_pos, mp3_file_len, err);
                        mp3_file_pos = mp3_file_len;
                        return 1;
                }
@@ -215,14 +165,13 @@ void mp3_start_play(FILE *f, int pos)
        mp3_current_file = NULL;
        mp3_buffer_offs = 0;
 
-       // must re-init decoder for new track
-       if (mp3dec) MP3FreeDecoder(mp3dec);
-       mp3dec = MP3InitDecoder();
-
-       if (!(PicoOpt&POPT_EN_MCD_CDDA) || f == NULL) // cdda disabled or no file?
+       if (!(PicoOpt & POPT_EN_MCD_CDDA) || f == NULL) // cdda disabled or no file?
                return;
 
-       //lprintf("mp3_start_play %p %i\n", f, pos);
+       // must re-init decoder for new track
+       if (mp3dec)
+               MP3FreeDecoder(mp3dec);
+       mp3dec = MP3InitDecoder();
 
        mp3_current_file = f;
        fseek(f, 0, SEEK_END);
@@ -230,41 +179,21 @@ void mp3_start_play(FILE *f, int pos)
 
        // seek..
        if (pos) {
-               mp3_file_pos = (mp3_file_len << 6) >> 10;
-               mp3_file_pos *= pos;
-               mp3_file_pos >>= 6;
+               unsigned long long pos64 = mp3_file_len;
+               pos64 *= pos;
+               mp3_file_pos = pos64 >> 10;
        }
 
        mp3_decode();
 }
 
-int mp3_get_offset(void)
-{
-       unsigned int offs1024 = 0;
-       int cdda_on;
-
-       cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_CDDA) && !(Pico_mcd->s68k_regs[0x36] & 1) &&
-                       (Pico_mcd->scd.Status_CDC & 1) && mp3_current_file != NULL;
-
-       if (cdda_on) {
-               offs1024  = mp3_file_pos << 7;
-               offs1024 /= mp3_file_len >> 3;
-       }
-       //lprintf("mp3_get_offset offs1024=%u (%i/%i)\n", offs1024, mp3_file_pos, mp3_file_len);
-
-       return offs1024;
-}
-
-#endif // ifndef __GP2X__
-
 void mp3_update(int *buffer, int length, int stereo)
 {
        int length_mp3, shr = 0;
        void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;
 
-#ifndef __GP2X__
-       if (mp3_current_file == NULL || mp3_file_pos >= mp3_file_len) return; // no file / EOF
-#endif
+       if (mp3_current_file == NULL || mp3_file_pos >= mp3_file_len)
+               return; /* no file / EOF */
 
        length_mp3 = length;
        if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; length_mp3 <<= 1; shr = 1; }
@@ -287,4 +216,3 @@ void mp3_update(int *buffer, int length, int stereo)
        }
 }
 
-

diff --git a/platform/gp2x/940ctl.c b/platform/gp2x/940ctl.c
index 38a9f9d..afd653f 100644 (file)
--- a/platform/gp2x/940ctl.c
+++ b/platform/gp2x/940ctl.c
@@ -405,24 +405,24 @@ int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)
 }\r
 \r
 \r
+/***********************************************************/\r
+\r
 static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
 static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
 \r
 void mp3_update(int *buffer, int length, int stereo)\r
 {\r
        int length_mp3;\r
-       int cdda_on;\r
-\r
-       // playback was started, track not ended\r
-       cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
 \r
-       if (!cdda_on) return;\r
-\r
-       if (!(PicoOpt&0x200)) {\r
+       if (!(PicoOpt & POPT_EXT_FM)) {\r
                mp3_update_local(buffer, length, stereo);\r
                return;\r
        }\r
 \r
+       // check if playback was started, track not ended\r
+       if (loaded_mp3 == NULL || shared_ctl->mp3_offs >= shared_ctl->mp3_len)\r
+               return;\r
+\r
        length_mp3 = length;\r
        if (PsndRate == 22050) length_mp3 <<= 1;        // mp3s are locked to 44100Hz stereo\r
        else if (PsndRate == 11025) length_mp3 <<= 2;   // so make length 44100ish\r
@@ -475,13 +475,15 @@ void mp3_update(int *buffer, int length, int stereo)
 }\r
 \r
 \r
-/***********************************************************/\r
-\r
 void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
 {\r
        int byte_offs = 0;\r
 \r
-       if (!(PicoOpt&0x800)) { // cdda disabled?\r
+       if (!(PicoOpt & POPT_EN_MCD_CDDA) || f == NULL)\r
+               return;\r
+\r
+       if (!(PicoOpt & POPT_EXT_FM)) {\r
+               mp3_start_play_local(f, pos);\r
                return;\r
        }\r
 \r
@@ -522,31 +524,7 @@ void mp3_start_play(FILE *f, int pos) // pos is 0-1023
        mp3_job_started = 0;\r
        shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
 \r
-       if (PicoOpt & POPT_EXT_FM)\r
-       {\r
-               add_job_940(JOB940_MP3RESET);\r
-               if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
-       }\r
-       else\r
-               mp3_start_local();\r
-}\r
-\r
-\r
-int mp3_get_offset(void)\r
-{\r
-       unsigned int offs1024 = 0;\r
-       int cdda_on;\r
-\r
-       cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
-                       (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
-\r
-       if (cdda_on) {\r
-               offs1024  = shared_ctl->mp3_offs << 7;\r
-               offs1024 /= shared_ctl->mp3_len  >> 3;\r
-       }\r
-       printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
-\r
-       return offs1024;\r
+       add_job_940(JOB940_MP3RESET);\r
+       if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
 }\r
 \r
-\r

diff --git a/platform/gp2x/code940/940.c b/platform/gp2x/code940/940.c
index 90087a3..a4d3a46 100644 (file)
--- a/platform/gp2x/code940/940.c
+++ b/platform/gp2x/code940/940.c
@@ -61,32 +61,43 @@ static void mp3_decode(void)
 \r
        if (bytesLeft <= 0) return; // EOF, nothing to do\r
 \r
-retry:\r
-       offset = find_sync_word(readPtr, bytesLeft);\r
-       if (offset < 0) {\r
-               set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, shared_ctl->mp3_len);\r
-               return; // EOF\r
-       }\r
-       readPtr += offset;\r
-       bytesLeft -= offset;\r
-\r
-       err = MP3Decode(shared_data->mp3dec, &readPtr, &bytesLeft,\r
-                       shared_data->mp3_buffer[shared_ctl->mp3_buffsel], 0);\r
-       if (err) {\r
-               if (err == ERR_MP3_INDATA_UNDERFLOW) {\r
-                       set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, shared_ctl->mp3_len);\r
-                       return;\r
-               } else if (err <= -6 && err >= -12) {\r
-                       // ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*\r
-                       // just try to skip the offending frame..\r
-                       readPtr++;\r
-                       bytesLeft--;\r
-                       if (retries++ < 2) goto retry;\r
+       for (retries = 0; retries < 2; retries++)\r
+       {\r
+               offset = find_sync_word(readPtr, bytesLeft);\r
+               if (offset < 0)\r
+                       goto set_eof;\r
+\r
+               readPtr += offset;\r
+               bytesLeft -= offset;\r
+\r
+               err = MP3Decode(shared_data->mp3dec, &readPtr, &bytesLeft,\r
+                               shared_data->mp3_buffer[shared_ctl->mp3_buffsel], 0);\r
+               if (err) {\r
+                       if (err == ERR_MP3_MAINDATA_UNDERFLOW)\r
+                               // just need another frame\r
+                               continue;\r
+\r
+                       if (err == ERR_MP3_INDATA_UNDERFLOW)\r
+                               goto set_eof;\r
+\r
+                       if (err <= -6 && err >= -12) {\r
+                               // ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*\r
+                               // just try to skip the offending frame..\r
+                               readPtr++;\r
+                               bytesLeft--;\r
+                               continue;\r
+                       }\r
+                       shared_ctl->mp3_errors++;\r
+                       shared_ctl->mp3_lasterr = err;\r
                }\r
-               shared_ctl->mp3_errors++;\r
-               shared_ctl->mp3_lasterr = err;\r
+               break;\r
        }\r
+\r
        set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, readPtr - mp3_data);\r
+       return;\r
+\r
+set_eof:\r
+       set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, shared_ctl->mp3_len);\r
 }\r
 \r
 static void ym_flush_writes(void)\r

diff --git a/platform/gp2x/code940/Makefile b/platform/gp2x/code940/Makefile
index ab88bf1..886ded9 100644 (file)
--- a/platform/gp2x/code940/Makefile
+++ b/platform/gp2x/code940/Makefile
@@ -9,9 +9,10 @@ export CROSS = arm-linux-
 # settings\r
 #up = 1\r
 \r
-DEFINC = -I../.. -I. -D__GP2X__ -DARM # -DBENCHMARK\r
-COPT_COMMON = -static -s -O2 -ftracer -fstrength-reduce -Wall -fomit-frame-pointer -fstrict-aliasing -ffast-math\r
-COPT = $(COPT_COMMON) -mtune=arm940t\r
+DEFINC = -I../.. -I. -D__GP2X__ -DARM\r
+# -ftracer\r
+COPT_COMMON = -static -s -O2 -Wall -fomit-frame-pointer -fstrict-aliasing -ffast-math\r
+CFLAGS = $(COPT_COMMON) $(DEFINC) -mcpu=arm940t -mtune=arm940t\r
 GCC = $(CROSS)gcc\r
 STRIP = $(CROSS)strip\r
 AS = $(CROSS)as\r
@@ -25,16 +26,16 @@ all: $(BIN)
 \r
 .c.o:\r
        @echo ">>>" $<\r
-       $(GCC) $(COPT) $(DEFINC) -c $< -o $@\r
+       $(GCC) $(CFLAGS) -c $< -o $@\r
 .s.o:\r
        @echo ">>>" $<\r
-       $(GCC) $(COPT) $(DEFINC) -c $< -o $@\r
+       $(GCC) $(CFLAGS) -c $< -o $@\r
 \r
 \r
 # stuff for 940 core\r
 \r
 # init, emu_control, emu\r
-OBJS940 += 940init.o 940.o 940ym2612.o memcpy.o mix.o misc.o\r
+OBJS940 += 940init.o 940.o 940ym2612.o memcpy.o misc_arm.o\r
 # the asm code seems to be faster when run on 920, but not on 940 for some reason\r
 # OBJS940 += ../../Pico/sound/ym2612_asm.o\r
 \r
@@ -43,24 +44,24 @@ OBJS940 += uClibc/memset.o uClibc/s_floor.o uClibc/e_pow.o uClibc/e_sqrt.o uClib
 OBJS940 += uClibc/s_scalbn.o uClibc/s_copysign.o uClibc/k_sin.o uClibc/k_cos.o uClibc/s_sin.o\r
 OBJS940 += uClibc/e_rem_pio2.o uClibc/k_rem_pio2.o uClibc/e_log.o uClibc/wrappers.o\r
 \r
-$(BIN) : code940.gpe\r
+$(BIN) : code940.elf\r
        @echo ">>>" $@\r
        $(OBJCOPY) -O binary $< $@\r
 \r
-code940.gpe : $(OBJS940) ../../common/helix/helix_mp3.a\r
+code940.elf : $(OBJS940) ../../common/helix/$(CROSS)helix-mp3.a\r
        @echo ">>>" $@\r
        $(LD) -static -e code940 -Ttext 0x0 $^ -L$(lgcc_path) -lgcc -o $@ -Map code940.map\r
 \r
-940ym2612.o : ../../../Pico/sound/ym2612.c\r
+940ym2612.o : ../../../pico/sound/ym2612.c\r
        @echo ">>>" $@\r
-       $(GCC) $(COPT) -Os $(DEFINC) -DEXTERNAL_YM2612 -c $< -o $@\r
+       $(GCC) $(CFLAGS) -Os -DEXTERNAL_YM2612 -c $< -o $@\r
 \r
-mix.o : ../../../Pico/sound/mix.s\r
+mix.o : ../../../pico/sound/mix.s\r
        @echo ">>>" $@\r
-       $(GCC) $(COPT) $(DEFINC) -DEXTERNAL_YM2612 -c $< -o $@\r
-misc.o : ../../../Pico/Misc.s\r
+       $(GCC) $(CFLAGS) -DEXTERNAL_YM2612 -c $< -o $@\r
+misc_arm.o : ../../../pico/misc_arm.s\r
        @echo ">>>" $@\r
-       $(GCC) $(COPT) $(DEFINC) -DEXTERNAL_YM2612 -c $< -o $@\r
+       $(GCC) $(CFLAGS) -DEXTERNAL_YM2612 -c $< -o $@\r
 \r
 ../../common/helix/helix_mp3.a:\r
        @make -C ../../common/helix/\r
@@ -72,9 +73,9 @@ up: $(BIN)
 \r
 # cleanup\r
 clean: tidy\r
-       @$(RM) code940.bin\r
+       $(RM) $(BIN)\r
 tidy:\r
-       @$(RM) code940.gpe $(OBJS940) code940.map\r
+       $(RM) code940.elf $(OBJS940) code940.map\r
 \r
 \r
 OBJSMP3T = mp3test.o ../gp2x.o ../asmutils.o ../usbjoy.o\r
@@ -89,8 +90,8 @@ cleanmp3test:
 \r
 # uClibc/e_pow.o : uClibc/e_pow.c\r
 #      @echo $<\r
-#      @$(GCC) $(COPT) $(DEFINC) -fno-profile-generate -c $< -o $@\r
+#      @$(GCC) $(CFLAGS) -fno-profile-generate -c $< -o $@\r
 \r
 # uClibc/e_sqrt.o : uClibc/e_sqrt.c\r
 #      @echo $<\r
-#      @$(GCC) $(COPT) $(DEFINC) -fno-profile-generate -c $< -o $@\r
+#      @$(GCC) $(CFLAGS) -fno-profile-generate -c $< -o $@\r

diff --git a/platform/gp2x/emu.c b/platform/gp2x/emu.c
index 372ce56..0700e81 100644 (file)
--- a/platform/gp2x/emu.c
+++ b/platform/gp2x/emu.c
@@ -409,6 +409,7 @@ void plat_status_msg_busy_next(const char *msg)
 {\r
        plat_status_msg_clear();\r
        pemu_update_display("", msg);\r
+       emu_status_msg("");\r
 \r
        /* assumption: msg_busy_next gets called only when\r
         * something slow is about to happen */\r
@@ -600,22 +601,26 @@ static void updateSound(int len)
 void pemu_sound_start(void)\r
 {\r
        static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;\r
-       int target_fps = Pico.m.pal ? 50 : 60;\r
 \r
        PsndOut = NULL;\r
 \r
        // prepare sound stuff\r
-       if (currentConfig.EmuOpt & 4)\r
+       if (currentConfig.EmuOpt & EOPT_EN_SOUND)\r
        {\r
+               int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;\r
+               int target_fps = Pico.m.pal ? 50 : 60;\r
                int snd_excess_add;\r
-               if (PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old ||\r
-                               ((PicoOpt&0x200) && crashed_940)) {\r
+               gp2x_soc_t soc;\r
+\r
+               #define SOUND_RERATE_FLAGS (POPT_EN_FM|POPT_EN_PSG|POPT_EN_STEREO|POPT_EXT_FM|POPT_EN_MCD_CDDA)\r
+               if (PsndRate != PsndRate_old || Pico.m.pal != pal_old || ((PicoOpt & POPT_EXT_FM) && crashed_940) ||\r
+                               ((PicoOpt ^ PicoOpt_old) & SOUND_RERATE_FLAGS)) {\r
                        PsndRerate(Pico.m.frame_count ? 1 : 0);\r
                }\r
-               snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
+               snd_excess_add = ((PsndRate - PsndLen * target_fps)<<16) / target_fps;\r
                printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",\r
-                       PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);\r
-               sndout_oss_start(PsndRate, 16, (PicoOpt&8)>>3);\r
+                       PsndRate, PsndLen, snd_excess_add, is_stereo, Pico.m.pal);\r
+               sndout_oss_start(PsndRate, 16, is_stereo);\r
                sndout_oss_setvol(currentConfig.volume, currentConfig.volume);\r
                PicoWriteSound = updateSound;\r
                plat_update_volume(0, 0);\r
@@ -624,6 +629,11 @@ void pemu_sound_start(void)
                PsndRate_old = PsndRate;\r
                PicoOpt_old  = PicoOpt;\r
                pal_old = Pico.m.pal;\r
+\r
+               /* Wiz's sound hardware needs more prebuffer */\r
+               soc = soc_detect();\r
+               if (soc == SOCID_POLLUX)\r
+                       updateSound(PsndLen);\r
        }\r
 }\r
 \r