mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
4abfd37779
A game can leave the SPU CD-enable bit set through voice-only play, which kept the HQ voice mix bypassed. Reported by michaelm-afk. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
85 lines
3.7 KiB
C
85 lines
3.7 KiB
C
/* Synthetic voice taps only; exercises the real shadow mixer and verifier. */
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#include "spu.h"
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#include "spu_shadow.h"
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#undef NDEBUG
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#include <assert.h>
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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static SpuShadowFrameTapPub taps[2048];
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static uint16_t ctrl;
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static uint64_t pushed;
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static uint32_t queued;
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void spu_debug_info(SpuDebugInfo* out) { memset(out,0,sizeof(*out));out->cd_push_frames=pushed;out->cd_frames=queued; }
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void spu_get_global_state(SpuGlobalState* out) { memset(out,0,sizeof(*out));out->ctrl=ctrl; }
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const void *spu_shadow_tap_buffer(void) { return taps; }
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int spu_shadow_tap_count(void) { return 2048; }
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static void feed(unsigned block, int mismatch, int check_output) {
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int16_t canon[4096], reference[4096];
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memset(taps, 0, sizeof(taps));
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for (unsigned i = 0; i < 2048; ++i) {
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int16_t sample = (int16_t)(12000.0 * sin((block * 2048.0 + i) * .0003));
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SpuShadowVoiceTapPub *voice = &taps[i].voice[0];
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for (int j = 0; j < 4; ++j) voice->s[j] = sample;
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voice->env = 32767; voice->active = 1;
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voice->vol_l = voice->vol_r = 16384;
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taps[i].main_l = taps[i].main_r = 16384; taps[i].enabled = 1;
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canon[2*i] = canon[2*i+1] = (int16_t)((float)sample * (32767.0f / 32768.0f) /
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(mismatch ? 32.0f : 1.0f));
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}
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memcpy(reference, canon, sizeof(canon));
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spu_shadow_process(canon, 2048);
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if (check_output == 2) assert(memcmp(canon, reference, sizeof(canon)) == 0);
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else if (check_output)
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for (unsigned i = 0; i < 4096; ++i) assert(abs(canon[i] - reference[i]) <= 1);
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}
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int main(void) {
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#ifdef _WIN32
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_putenv_s("PSX_AUDIO_SHADOW", "");
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#else
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unsetenv("PSX_AUDIO_SHADOW");
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#endif
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spu_shadow_set_enabled(0); spu_shadow_reset();
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feed(0, 0, 2); /* Disabled path preserves canonical audio byte-for-byte. */
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spu_shadow_set_enabled(1); spu_shadow_reset();
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for (unsigned block = 0; block < 48; ++block) feed(block, 0, 1);
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SpuShadowInfo info;
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spu_shadow_get_info(&info);
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assert(info.enabled && info.proven);
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assert(info.last_ratio > .99f && info.last_ratio < 1.01f);
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assert(info.last_r > .99f);
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/* The CD-enable bit alone must not disable an already proven voice mix. */
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ctrl=1;feed(48,0,1);spu_shadow_get_info(&info);assert(info.proven);
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/* A proven voice-only shadow must not replace newly starting XA/CD.
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* Synthetic CD samples, no original audio/game state. */
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ctrl=1;
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for(unsigned block=0;block<8;++block) {
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int16_t canon[4096], reference[4096];
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memset(taps,0,sizeof(taps));
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for(unsigned i=0;i<4096;++i)canon[i]=(int16_t)(4000+(i%511));
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memcpy(reference,canon,sizeof(canon));
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pushed+=2048;queued=0; /* Last FIFO block has drained: still CD activity. */
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spu_shadow_process(canon,2048);
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assert(memcmp(canon,reference,sizeof(canon))==0);
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spu_shadow_get_info(&info);assert(!info.proven);
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}
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queued=2048;
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feed(48,0,2);spu_shadow_get_info(&info);assert(!info.proven);
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queued=0;pushed+=2048;feed(49,0,2); /* Last queued block drains. */
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ctrl=1;
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feed(50,0,2); /* CD exit cannot reuse the pre-CD proof. */
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for(unsigned block=51;block<99;++block)feed(block,0,1);
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spu_shadow_get_info(&info);assert(info.proven);
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for (unsigned block = 97; block < 289; ++block) feed(block, 1, 0);
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spu_shadow_get_info(&info);
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assert(!info.proven && info.pauses > 0); /* Real guard still rejects mismatch. */
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spu_shadow_set_enabled(0); spu_shadow_reset();
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feed(240, 1, 2);
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puts("SPU shadow: normalized proof, output level, idle CD enable, first/queued/last CD passthrough, reproof, mismatch fallback and off passed");
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return 0;
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}
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