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-rw-r--r--Emu8000.cpp30
-rw-r--r--emu8k.c59
-rw-r--r--emu8k.h5
-rw-r--r--emu8k_internal.h3
4 files changed, 67 insertions, 30 deletions
diff --git a/Emu8000.cpp b/Emu8000.cpp
index 86dcb11..4e3fd01 100644
--- a/Emu8000.cpp
+++ b/Emu8000.cpp
@@ -132,9 +132,12 @@ typedef struct {
bool volatile fShutdown;
/** Flag from render thread indicated it has shutdown (e.g. due to error or timeout). */
bool volatile fStopped;
- /** (System clock) timestamp of last OPL chip access. */
+ /** (System clock) timestamp of last port write. */
uint64_t tmLastWrite;
+ /** (Virtual clock) timestamp of last frame rendered. */
+ uint64_t tmLastRender;
+
/** To protect access to opl3_chip from the render thread and main thread. */
RTCRITSECT critSect;
/** Handle to emu8k. */
@@ -148,18 +151,26 @@ typedef EMUSTATE *PEMUSTATE;
#ifndef VBOX_DEVICE_STRUCT_TESTCASE
-static inline uint64_t emuCalculateFramesFromMilli(PEMUSTATE pThis, uint64_t milli)
+DECLINLINE(uint64_t) emuCalculateFramesFromMilli(PEMUSTATE pThis, uint64_t milli)
{
uint64_t rate = pThis->uSampleRate;
return (rate * milli) / 1000;
}
-static inline size_t emuCalculateBytesFromFrames(PEMUSTATE pThis, uint64_t frames)
+DECLINLINE(uint64_t) emuCalculateFramesFromNano(PEMUSTATE pThis, uint64_t nano)
+{
+ uint64_t rate = pThis->uSampleRate;
+ return (rate * nano) / 1000000000;
+}
+
+DECLINLINE(size_t) emuCalculateBytesFromFrames(PEMUSTATE pThis, uint64_t frames)
{
NOREF(pThis);
return frames * sizeof(uint16_t) * EMU_NUM_CHANNELS;
}
+
+
/**
* The render thread calls into the emulator to render audio frames, and then pushes them
* on the PCM output device.
@@ -172,7 +183,8 @@ static inline size_t emuCalculateBytesFromFrames(PEMUSTATE pThis, uint64_t frame
static DECLCALLBACK(int) emuRenderThread(RTTHREAD ThreadSelf, void *pvUser)
{
RT_NOREF(ThreadSelf);
- PEMUSTATE pThis = (PEMUSTATE)pvUser;
+ PPDMDEVINS pDevIns = (PPDMDEVINS)pvUser;
+ PEMUSTATE pThis = PDMDEVINS_2_DATA(pDevIns, PEMUSTATE);
PCMOutBackend *pPcmOut = &pThis->pcmOut;
// Compute the max number of frames we can store on our temporary buffer.
@@ -190,6 +202,7 @@ static DECLCALLBACK(int) emuRenderThread(RTTHREAD ThreadSelf, void *pvUser)
RTCritSectEnter(&pThis->critSect);
emu8k_render(pThis->emu, buf, buf_frames);
+ pThis->tmLastRender = PDMDevHlpTMTimeVirtGetNano(pDevIns);
RTCritSectLeave(&pThis->critSect);
Log9(("writing %lld frames\n", buf_frames));
@@ -275,7 +288,7 @@ static void emuWakeRenderThread(PPDMDEVINS pDevIns)
Log3(("Creating render thread\n"));
- int rc = RTThreadCreateF(&pThis->hRenderThread, emuRenderThread, pThis, 0,
+ int rc = RTThreadCreateF(&pThis->hRenderThread, emuRenderThread, pDevIns, 0,
RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE,
"emu%u_render", pDevIns->iInstance);
AssertLogRelRCReturnVoid(rc);
@@ -291,6 +304,10 @@ static DECLCALLBACK(VBOXSTRICTRC) emuIoPortRead(PPDMDEVINS pDevIns, void *pvUser
PEMUSTATE pThis = PDMDEVINS_2_DATA(pDevIns, PEMUSTATE);
+ RTCritSectEnter(&pThis->critSect);
+ uint64_t frames_since_last_render = emuCalculateFramesFromNano(pThis, PDMDevHlpTMTimeVirtGetNano(pDevIns) - pThis->tmLastRender);
+ emu8k_update_virtual_sample_count(pThis->emu, frames_since_last_render);
+
switch (cb) {
case sizeof(uint8_t):
*pu32 = emu8k_inb(pThis->emu, port);
@@ -307,6 +324,8 @@ static DECLCALLBACK(VBOXSTRICTRC) emuIoPortRead(PPDMDEVINS pDevIns, void *pvUser
break;
}
+ RTCritSectLeave(&pThis->critSect);
+
Log9Func(("read port 0x%X (%u): %#04x\n", port, cb, *pu32));
return VINF_SUCCESS;
@@ -397,6 +416,7 @@ static DECLCALLBACK(void) emuR3Reset(PPDMDEVINS pDevIns)
RTCritSectEnter(&pThis->critSect);
emu8k_reset(pThis->emu);
+ pThis->tmLastRender = PDMDevHlpTMTimeVirtGetNano(pDevIns);
RTCritSectLeave(&pThis->critSect);
}
diff --git a/emu8k.c b/emu8k.c
index fdcf773..6737616 100644
--- a/emu8k.c
+++ b/emu8k.c
@@ -685,7 +685,7 @@ uint16_t emu8k_inw(emu8k_t *emu8k, uint16_t addr)
it is used by programs to wait. Not critical, but should help reduce
the amount of calls and wait time */
case 27: /*Sample Counter ( 44Khz clock) */
- return emu8k->wc;
+ return emu8k->sample_count + emu8k->sample_count_virtual;
}
break;
@@ -753,9 +753,11 @@ uint16_t emu8k_inw(emu8k_t *emu8k, uint16_t addr)
void emu8k_outw(emu8k_t *emu8k, uint16_t addr, uint16_t val)
{
+#if 0
/*TODO: I would like to not call this here, but i found it was needed or else cubic player would not finish opening (take a looot more of time than usual).
* Basically, being here means that the audio is generated in the emulation thread, instead of the audio thread.*/
- // TODO emu8k_update(emu8k);
+ emu8k_update(emu8k);
+#endif
#ifdef EMU8K_DEBUG_REGISTERS
if (addr == 0xE22)
@@ -2150,7 +2152,8 @@ I've recopilated these sentences to get an idea of how to loop
}
/* Update EMU clock. */
- emu8k->wc += (new_pos - emu8k->pos);
+ emu8k->sample_count += (new_pos - emu8k->pos);
+ emu8k->sample_count_virtual = 0;
emu8k->pos = new_pos;
}
@@ -2388,29 +2391,32 @@ void emu8k_free(emu8k_t* emu8k)
void emu8k_reset(emu8k_t* emu8k)
{
- /* NOTE! read_pos and buffer content is implicitly initialized to zero by the sb_t structure memset on sb_awe32_init() */
- emu8k->reverb_engine.reflections[0].bufsize = 2 * REV_BUFSIZE_STEP;
- emu8k->reverb_engine.reflections[1].bufsize = 4 * REV_BUFSIZE_STEP;
- emu8k->reverb_engine.reflections[2].bufsize = 8 * REV_BUFSIZE_STEP;
- emu8k->reverb_engine.reflections[3].bufsize = 13 * REV_BUFSIZE_STEP;
- emu8k->reverb_engine.reflections[4].bufsize = 19 * REV_BUFSIZE_STEP;
- emu8k->reverb_engine.reflections[5].bufsize = 26 * REV_BUFSIZE_STEP;
-
- /*This is a bit random.*/
- for (int c = 0; c < 4; c++)
- {
- emu8k->reverb_engine.allpass[3 - c].feedback = 0.5;
- emu8k->reverb_engine.allpass[3 - c].bufsize = (4 * c) * REV_BUFSIZE_STEP + 55;
- emu8k->reverb_engine.allpass[7 - c].feedback = 0.5;
- emu8k->reverb_engine.allpass[7 - c].bufsize = (4 * c) * REV_BUFSIZE_STEP + 55;
- }
+ /* NOTE! read_pos and buffer content is implicitly initialized to zero by the sb_t structure memset on sb_awe32_init() */
+ emu8k->reverb_engine.reflections[0].bufsize = 2 * REV_BUFSIZE_STEP;
+ emu8k->reverb_engine.reflections[1].bufsize = 4 * REV_BUFSIZE_STEP;
+ emu8k->reverb_engine.reflections[2].bufsize = 8 * REV_BUFSIZE_STEP;
+ emu8k->reverb_engine.reflections[3].bufsize = 13 * REV_BUFSIZE_STEP;
+ emu8k->reverb_engine.reflections[4].bufsize = 19 * REV_BUFSIZE_STEP;
+ emu8k->reverb_engine.reflections[5].bufsize = 26 * REV_BUFSIZE_STEP;
+
+ /*This is a bit random.*/
+ for (int c = 0; c < 4; c++)
+ {
+ emu8k->reverb_engine.allpass[3 - c].feedback = 0.5;
+ emu8k->reverb_engine.allpass[3 - c].bufsize = (4 * c) * REV_BUFSIZE_STEP + 55;
+ emu8k->reverb_engine.allpass[7 - c].feedback = 0.5;
+ emu8k->reverb_engine.allpass[7 - c].bufsize = (4 * c) * REV_BUFSIZE_STEP + 55;
+ }
- /* Even when the documentation says that this has to be written by applications to initialize the card,
+ /* Even when the documentation says that this has to be written by applications to initialize the card,
* several applications and drivers ( aweman on windows, linux oss driver..) read it to detect an AWE card. */
- emu8k->hwcf1 = 0x59;
- emu8k->hwcf2 = 0x20;
- /* Initial state is muted. 0x04 is unmuted. */
- emu8k->hwcf3 = 0x00;
+ emu8k->hwcf1 = 0x59;
+ emu8k->hwcf2 = 0x20;
+ /* Initial state is muted. 0x04 is unmuted. */
+ emu8k->hwcf3 = 0x00;
+
+ emu8k->sample_count = 0;
+ emu8k->sample_count_virtual = 0;
}
void emu8k_render(emu8k_t *emu8k, int16_t *buf, size_t frames)
@@ -2425,3 +2431,8 @@ void emu8k_render(emu8k_t *emu8k, int16_t *buf, size_t frames)
emu8k->pos = 0;
}
+
+void emu8k_update_virtual_sample_count(emu8k_t *emu8k, uint8_t sample_count)
+{
+ emu8k->sample_count_virtual = sample_count;
+}
diff --git a/emu8k.h b/emu8k.h
index 86b8e58..01782a9 100644
--- a/emu8k.h
+++ b/emu8k.h
@@ -61,6 +61,11 @@ void emu8k_outb(emu8k_t *emu8k, uint16_t addr, uint8_t val);
void emu8k_render(emu8k_t *emu8k, int16_t *buf, size_t frames);
+/** Between calls to emu8k_render, the virtual sample count is used to keep the "sample count" register ticking at a reasonable pace. */
+void emu8k_update_virtual_sample_count(emu8k_t *emu8k, uint8_t sample_count);
+/* Many programs seem to rely in this counter incrementing frequently, and may hang/error out if it doesn't.
+ * It is reset to 0 whenever we render and therefore increment the real sample count.
+ * This means that effectively the sample count register may readjust itself (go back or jump ahead) on _render :(. */
#ifdef __cplusplus
} /* extern "C" */
diff --git a/emu8k_internal.h b/emu8k_internal.h
index a8e3ea8..19132fa 100644
--- a/emu8k_internal.h
+++ b/emu8k_internal.h
@@ -401,7 +401,8 @@ typedef struct emu8k_t
uint32_t smalr, smarr, smalw, smarw;
uint16_t smld_buffer, smrd_buffer;
- uint16_t wc;
+ uint16_t sample_count;
+ uint16_t sample_count_virtual;
uint16_t id;
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 13:14:50 +0000