--- /dev/null
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Mupen64plus-rsp-hle - musyx.c *
+ * Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ *
+ * Copyright (C) 2013 Bobby Smiles *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU General Public License *
+ * along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+#include <stddef.h>
+
+#include "m64p_plugin.h"
+#include "m64p_types.h"
+#include "hle.h"
+#include "musyx.h"
+
+/* various constants */
+enum { SUBFRAME_SIZE = 192 };
+enum { MAX_VOICES = 32 };
+
+enum { SAMPLE_BUFFER_SIZE = 0x200 };
+
+
+enum {
+ SFD_VOICE_COUNT = 0x0,
+ SFD_SFX_INDEX = 0x2,
+ SFD_VOICE_BITMASK = 0x4,
+ SFD_STATE_PTR = 0x8,
+ SFD_SFX_PTR = 0xc,
+
+ SFD_VOICES = 0x10
+};
+
+enum {
+ VOICE_ENV_BEGIN = 0x00,
+ VOICE_ENV_STEP = 0x10,
+ VOICE_PITCH_Q16 = 0x20,
+ VOICE_PITCH_SHIFT = 0x22,
+ VOICE_CATSRC_0 = 0x24,
+ VOICE_CATSRC_1 = 0x30,
+ VOICE_ADPCM_FRAMES = 0x3c,
+ VOICE_SKIP_SAMPLES = 0x3e,
+
+ /* for PCM16 */
+ VOICE_U16_40 = 0x40,
+ VOICE_U16_42 = 0x42,
+
+ /* for ADPCM */
+ VOICE_ADPCM_TABLE_PTR = 0x40,
+
+ VOICE_INTERLEAVED_PTR = 0x44,
+ VOICE_END_POINT = 0x48,
+ VOICE_RESTART_POINT = 0x4a,
+ VOICE_U16_4C = 0x4c,
+ VOICE_U16_4E = 0x4e,
+
+ VOICE_SIZE = 0x50
+};
+
+enum {
+ CATSRC_PTR1 = 0x00,
+ CATSRC_PTR2 = 0x04,
+ CATSRC_SIZE1 = 0x08,
+ CATSRC_SIZE2 = 0x0a
+};
+
+enum {
+ STATE_LAST_SAMPLE = 0x0,
+ STATE_BASE_VOL = 0x100,
+ STATE_CC0 = 0x110,
+ STATE_740_LAST4 = 0x290
+};
+
+enum {
+ SFX_CBUFFER_PTR = 0x00,
+ SFX_CBUFFER_LENGTH = 0x04,
+ SFX_TAP_COUNT = 0x08,
+ SFX_FIR4_HGAIN = 0x0a,
+ SFX_TAP_DELAYS = 0x0c,
+ SFX_TAP_GAINS = 0x2c,
+ /* padding = 0x3c */
+ SFX_FIR4_HCOEFFS = 0x40
+};
+
+
+/* struct definition */
+typedef struct {
+ /* internal subframes */
+ int16_t left[SUBFRAME_SIZE];
+ int16_t right[SUBFRAME_SIZE];
+ int16_t cc0[SUBFRAME_SIZE];
+ int16_t e50[SUBFRAME_SIZE];
+
+ /* internal subframes base volumes */
+ int32_t base_vol[4];
+
+ /* */
+ int16_t subframe_740_last4[4];
+} musyx_t;
+
+/* helper functions prototypes */
+static void load_base_vol(int32_t *base_vol, uint32_t address);
+static void save_base_vol(const int32_t *base_vol, uint32_t address);
+static void update_base_vol(int32_t *base_vol, uint32_t voice_mask,
+ uint32_t last_sample_ptr);
+
+static void init_subframes(musyx_t *musyx);
+
+static uint32_t voice_stage(musyx_t *musyx, uint32_t voice_ptr,
+ uint32_t last_sample_ptr);
+
+static void dma_cat8(uint8_t *dst, uint32_t catsrc_ptr);
+static void dma_cat16(uint16_t *dst, uint32_t catsrc_ptr);
+
+static void load_samples_PCM16(uint32_t voice_ptr, int16_t *samples,
+ unsigned *segbase, unsigned *offset);
+static void load_samples_ADPCM(uint32_t voice_ptr, int16_t *samples,
+ unsigned *segbase, unsigned *offset);
+
+static void adpcm_decode_frames(int16_t *dst, const uint8_t *src,
+ const int16_t *table, uint8_t count,
+ uint8_t skip_samples);
+
+static int16_t adpcm_get_predicted_sample(uint8_t byte, uint8_t mask,
+ unsigned lshift, unsigned rshift);
+static void adpcm_get_predicted_frame(int16_t *dst, const uint8_t *src,
+ const uint8_t *nibbles,
+ unsigned int rshift);
+static void adpcm_decode_upto_8_samples(int16_t *dst, const int16_t *src,
+ const int16_t *cb_entry,
+ const int16_t *last_samples,
+ size_t size);
+
+static void mix_voice_samples(musyx_t *musyx, uint32_t voice_ptr,
+ const int16_t *samples, unsigned segbase,
+ unsigned offset, uint32_t last_sample_ptr);
+
+static void sfx_stage(musyx_t *musyx, uint32_t sfx_ptr, uint16_t idx);
+static void mix_subframes(int16_t *y, const int16_t *x, int16_t hgain);
+static void mix_fir4(int16_t *y, const int16_t *x, int16_t hgain, const int16_t *hcoeffs);
+
+
+static void interleave_stage(musyx_t *musyx, uint32_t output_ptr);
+
+
+static uint8_t *dram_u8(uint32_t address);
+static uint16_t *dram_u16(uint32_t address);
+static uint32_t *dram_u32(uint32_t address);
+
+static void load_u8(uint8_t *dst, uint32_t address, size_t count);
+static void load_u16(uint16_t *dst, uint32_t address, size_t count);
+static void load_u32(uint32_t *dst, uint32_t address, size_t count);
+
+static void store_u16(const uint16_t *src, uint32_t address, size_t count);
+
+static inline unsigned int align(unsigned int x, unsigned amount)
+{
+ --amount;
+ return (x + amount) & ~amount;
+}
+
+static int32_t rdot(size_t n, const int16_t *x, const int16_t *y)
+{
+ int32_t accu = 0;
+
+ y += n;
+
+ while (n != 0) {
+ accu += ((int32_t)*(x++) * (int32_t)*(--y));
+ --n;
+ }
+
+ return accu;
+}
+
+
+static int32_t dot4(const int16_t *x, const int16_t *y)
+{
+ size_t i;
+ int32_t accu = 0;
+
+ for (i = 0; i < 4; ++i)
+ accu = clamp_s16(accu + (((int32_t)x[i] * (int32_t)y[i]) >> 15));
+
+ return accu;
+}
+
+/* Fast and dirty way of reading dram memory
+ * Assume properly aligned access
+ */
+static uint8_t *dram_u8(uint32_t address)
+{
+ return (uint8_t *)&rsp.RDRAM[(address & 0xffffff) ^ S8];
+}
+
+static uint16_t *dram_u16(uint32_t address)
+{
+ return (uint16_t *)&rsp.RDRAM[(address & 0xffffff) ^ S16];
+}
+
+static uint32_t *dram_u32(uint32_t address)
+{
+ return (uint32_t *)&rsp.RDRAM[address & 0xffffff];
+}
+
+static void load_u8(uint8_t *dst, uint32_t address, size_t count)
+{
+ while (count != 0) {
+ *(dst++) = *dram_u8(address);
+ address += 1;
+ --count;
+ }
+}
+
+static void load_u16(uint16_t *dst, uint32_t address, size_t count)
+{
+ while (count != 0) {
+ *(dst++) = *dram_u16(address);
+ address += 2;
+ --count;
+ }
+}
+
+static void load_u32(uint32_t *dst, uint32_t address, size_t count)
+{
+ /* Optimization for uint32_t */
+ const uint32_t *src = dram_u32(address);
+
+ memcpy(dst, src, count * sizeof(uint32_t));
+}
+
+static void store_u16(const uint16_t *src, uint32_t address, size_t count)
+{
+ while (count != 0) {
+ *dram_u16(address) = *(src++);
+ address += 2;
+ --count;
+ }
+}
+
+/**************************************************************************
+ * MusyX audio ucode
+ **************************************************************************/
+void musyx_task(void)
+{
+ const OSTask_t *const task = get_task();
+
+ uint32_t sfd_ptr = task->data_ptr;
+ uint32_t sfd_count = task->data_size;
+ uint32_t state_ptr;
+ musyx_t musyx;
+
+ DebugMessage(M64MSG_VERBOSE, "musyx_task: *data=%x, #SF=%d",
+ sfd_ptr,
+ sfd_count);
+
+ state_ptr = *dram_u32(sfd_ptr + SFD_STATE_PTR);
+
+ /* load initial state */
+ load_base_vol(musyx.base_vol, state_ptr + STATE_BASE_VOL);
+ load_u16((uint16_t *)musyx.cc0, state_ptr + STATE_CC0, SUBFRAME_SIZE);
+ load_u16((uint16_t *)musyx.subframe_740_last4, state_ptr + STATE_740_LAST4,
+ 4);
+
+ for (;;) {
+ /* parse SFD structure */
+ uint16_t sfx_index = *dram_u16(sfd_ptr + SFD_SFX_INDEX);
+ uint32_t voice_mask = *dram_u32(sfd_ptr + SFD_VOICE_BITMASK);
+ uint32_t sfx_ptr = *dram_u32(sfd_ptr + SFD_SFX_PTR);
+ uint32_t voice_ptr = sfd_ptr + SFD_VOICES;
+ uint32_t last_sample_ptr = state_ptr + STATE_LAST_SAMPLE;
+ uint32_t output_ptr;
+
+ /* initialize internal subframes using updated base volumes */
+ update_base_vol(musyx.base_vol, voice_mask, last_sample_ptr);
+ init_subframes(&musyx);
+
+ /* active voices get mixed into L,R,cc0,e50 subframes (optional) */
+ output_ptr = voice_stage(&musyx, voice_ptr, last_sample_ptr);
+
+ /* apply delay-based effects (optional) */
+ sfx_stage(&musyx, sfx_ptr, sfx_index);
+
+ /* emit interleaved L,R subframes */
+ interleave_stage(&musyx, output_ptr);
+
+ --sfd_count;
+ if (sfd_count == 0)
+ break;
+
+ sfd_ptr += SFD_VOICES + MAX_VOICES * VOICE_SIZE;
+ state_ptr = *dram_u32(sfd_ptr + SFD_STATE_PTR);
+ }
+
+ /* writeback updated state */
+ save_base_vol(musyx.base_vol, state_ptr + STATE_BASE_VOL);
+ store_u16((uint16_t *)musyx.cc0, state_ptr + STATE_CC0, SUBFRAME_SIZE);
+ store_u16((uint16_t *)musyx.subframe_740_last4, state_ptr + STATE_740_LAST4,
+ 4);
+}
+
+static void load_base_vol(int32_t *base_vol, uint32_t address)
+{
+ base_vol[0] = ((uint32_t)(*dram_u16(address)) << 16) | (*dram_u16(address + 8));
+ base_vol[1] = ((uint32_t)(*dram_u16(address + 2)) << 16) | (*dram_u16(address + 10));
+ base_vol[2] = ((uint32_t)(*dram_u16(address + 4)) << 16) | (*dram_u16(address + 12));
+ base_vol[3] = ((uint32_t)(*dram_u16(address + 6)) << 16) | (*dram_u16(address + 14));
+}
+
+static void save_base_vol(const int32_t *base_vol, uint32_t address)
+{
+ unsigned k;
+
+ for (k = 0; k < 4; ++k) {
+ *dram_u16(address) = (uint16_t)(base_vol[k] >> 16);
+ address += 2;
+ }
+
+ for (k = 0; k < 4; ++k) {
+ *dram_u16(address) = (uint16_t)(base_vol[k]);
+ address += 2;
+ }
+}
+
+static void update_base_vol(int32_t *base_vol, uint32_t voice_mask,
+ uint32_t last_sample_ptr)
+{
+ unsigned i, k;
+ uint32_t mask;
+
+ DebugMessage(M64MSG_VERBOSE, "base_vol voice_mask = %08x", voice_mask);
+ DebugMessage(M64MSG_VERBOSE, "BEFORE: base_vol = %08x %08x %08x %08x",
+ base_vol[0], base_vol[1], base_vol[2], base_vol[3]);
+
+ /* optim: skip voices contributions entirely if voice_mask is empty */
+ if (voice_mask != 0) {
+ for (i = 0, mask = 1; i < MAX_VOICES;
+ ++i, mask <<= 1, last_sample_ptr += 8) {
+ if ((voice_mask & mask) == 0)
+ continue;
+
+ for (k = 0; k < 4; ++k)
+ base_vol[k] += (int16_t)*dram_u16(last_sample_ptr + k * 2);
+ }
+ }
+
+ /* apply 3% decay */
+ for (k = 0; k < 4; ++k)
+ base_vol[k] = (base_vol[k] * 0x0000f850) >> 16;
+
+ DebugMessage(M64MSG_VERBOSE, "AFTER: base_vol = %08x %08x %08x %08x",
+ base_vol[0], base_vol[1], base_vol[2], base_vol[3]);
+}
+
+static void init_subframes(musyx_t *musyx)
+{
+ unsigned i;
+
+ int16_t base_cc0 = clamp_s16(musyx->base_vol[2]);
+ int16_t base_e50 = clamp_s16(musyx->base_vol[3]);
+
+ int16_t *left = musyx->left;
+ int16_t *right = musyx->right;
+ int16_t *cc0 = musyx->cc0;
+ int16_t *e50 = musyx->e50;
+
+ for (i = 0; i < SUBFRAME_SIZE; ++i) {
+ *(e50++) = base_e50;
+ *(left++) = clamp_s16(*cc0 + base_cc0);
+ *(right++) = clamp_s16(-*cc0 - base_cc0);
+ *(cc0++) = 0;
+ }
+}
+
+/* Process voices, and returns interleaved subframe destination address */
+static uint32_t voice_stage(musyx_t *musyx, uint32_t voice_ptr,
+ uint32_t last_sample_ptr)
+{
+ uint32_t output_ptr;
+ int i = 0;
+
+ /* voice stage can be skipped if first voice has no samples */
+ if (*dram_u16(voice_ptr + VOICE_CATSRC_0 + CATSRC_SIZE1) == 0) {
+ DebugMessage(M64MSG_VERBOSE, "Skipping Voice stage");
+ output_ptr = *dram_u32(voice_ptr + VOICE_INTERLEAVED_PTR);
+ } else {
+ /* otherwise process voices until a non null output_ptr is encountered */
+ for (;;) {
+ /* load voice samples (PCM16 or APDCM) */
+ int16_t samples[SAMPLE_BUFFER_SIZE];
+ unsigned segbase;
+ unsigned offset;
+
+ DebugMessage(M64MSG_VERBOSE, "Processing Voice #%d", i);
+
+ if (*dram_u8(voice_ptr + VOICE_ADPCM_FRAMES) == 0)
+ load_samples_PCM16(voice_ptr, samples, &segbase, &offset);
+ else
+ load_samples_ADPCM(voice_ptr, samples, &segbase, &offset);
+
+ /* mix them with each internal subframes */
+ mix_voice_samples(musyx, voice_ptr, samples, segbase, offset,
+ last_sample_ptr + i * 8);
+
+ /* check break condition */
+ output_ptr = *dram_u32(voice_ptr + VOICE_INTERLEAVED_PTR);
+ if (output_ptr != 0)
+ break;
+
+ /* next voice */
+ ++i;
+ voice_ptr += VOICE_SIZE;
+ }
+ }
+
+ return output_ptr;
+}
+
+static void dma_cat8(uint8_t *dst, uint32_t catsrc_ptr)
+{
+ uint32_t ptr1 = *dram_u32(catsrc_ptr + CATSRC_PTR1);
+ uint32_t ptr2 = *dram_u32(catsrc_ptr + CATSRC_PTR2);
+ uint16_t size1 = *dram_u16(catsrc_ptr + CATSRC_SIZE1);
+ uint16_t size2 = *dram_u16(catsrc_ptr + CATSRC_SIZE2);
+
+ size_t count1 = size1;
+ size_t count2 = size2;
+
+ DebugMessage(M64MSG_VERBOSE, "dma_cat: %08x %08x %04x %04x",
+ ptr1,
+ ptr2,
+ size1,
+ size2);
+
+ load_u8(dst, ptr1, count1);
+
+ if (size2 == 0)
+ return;
+
+ load_u8(dst + count1, ptr2, count2);
+}
+
+static void dma_cat16(uint16_t *dst, uint32_t catsrc_ptr)
+{
+ uint32_t ptr1 = *dram_u32(catsrc_ptr + CATSRC_PTR1);
+ uint32_t ptr2 = *dram_u32(catsrc_ptr + CATSRC_PTR2);
+ uint16_t size1 = *dram_u16(catsrc_ptr + CATSRC_SIZE1);
+ uint16_t size2 = *dram_u16(catsrc_ptr + CATSRC_SIZE2);
+
+ size_t count1 = size1 >> 1;
+ size_t count2 = size2 >> 1;
+
+ DebugMessage(M64MSG_VERBOSE, "dma_cat: %08x %08x %04x %04x",
+ ptr1,
+ ptr2,
+ size1,
+ size2);
+
+ load_u16(dst, ptr1, count1);
+
+ if (size2 == 0)
+ return;
+
+ load_u16(dst + count1, ptr2, count2);
+}
+
+static void load_samples_PCM16(uint32_t voice_ptr, int16_t *samples,
+ unsigned *segbase, unsigned *offset)
+{
+
+ uint8_t u8_3e = *dram_u8(voice_ptr + VOICE_SKIP_SAMPLES);
+ uint16_t u16_40 = *dram_u16(voice_ptr + VOICE_U16_40);
+ uint16_t u16_42 = *dram_u16(voice_ptr + VOICE_U16_42);
+
+ unsigned count = align(u16_40 + u8_3e, 4);
+
+ DebugMessage(M64MSG_VERBOSE, "Format: PCM16");
+
+ *segbase = SAMPLE_BUFFER_SIZE - count;
+ *offset = u8_3e;
+
+ dma_cat16((uint16_t *)samples + *segbase, voice_ptr + VOICE_CATSRC_0);
+
+ if (u16_42 != 0)
+ dma_cat16((uint16_t *)samples, voice_ptr + VOICE_CATSRC_1);
+}
+
+static void load_samples_ADPCM(uint32_t voice_ptr, int16_t *samples,
+ unsigned *segbase, unsigned *offset)
+{
+ /* decompressed samples cannot exceed 0x400 bytes;
+ * ADPCM has a compression ratio of 5/16 */
+ uint8_t buffer[SAMPLE_BUFFER_SIZE * 2 * 5 / 16];
+ int16_t adpcm_table[128];
+
+ uint8_t u8_3c = *dram_u8(voice_ptr + VOICE_ADPCM_FRAMES );
+ uint8_t u8_3d = *dram_u8(voice_ptr + VOICE_ADPCM_FRAMES + 1);
+ uint8_t u8_3e = *dram_u8(voice_ptr + VOICE_SKIP_SAMPLES );
+ uint8_t u8_3f = *dram_u8(voice_ptr + VOICE_SKIP_SAMPLES + 1);
+ uint32_t adpcm_table_ptr = *dram_u32(voice_ptr + VOICE_ADPCM_TABLE_PTR);
+ unsigned count;
+
+ DebugMessage(M64MSG_VERBOSE, "Format: ADPCM");
+
+ DebugMessage(M64MSG_VERBOSE, "Loading ADPCM table: %08x", adpcm_table_ptr);
+ load_u16((uint16_t *)adpcm_table, adpcm_table_ptr, 128);
+
+ count = u8_3c << 5;
+
+ *segbase = SAMPLE_BUFFER_SIZE - count;
+ *offset = u8_3e & 0x1f;
+
+ dma_cat8(buffer, voice_ptr + VOICE_CATSRC_0);
+ adpcm_decode_frames(samples + *segbase, buffer, adpcm_table, u8_3c, u8_3e);
+
+ if (u8_3d != 0) {
+ dma_cat8(buffer, voice_ptr + VOICE_CATSRC_1);
+ adpcm_decode_frames(samples, buffer, adpcm_table, u8_3d, u8_3f);
+ }
+}
+
+static void adpcm_decode_frames(int16_t *dst, const uint8_t *src,
+ const int16_t *table, uint8_t count,
+ uint8_t skip_samples)
+{
+ int16_t frame[32];
+ const uint8_t *nibbles = src + 8;
+ unsigned i;
+ bool jump_gap = false;
+
+ DebugMessage(M64MSG_VERBOSE, "ADPCM decode: count=%d, skip=%d", count,
+ skip_samples);
+
+ if (skip_samples >= 32) {
+ jump_gap = true;
+ nibbles += 16;
+ src += 4;
+ }
+
+ for (i = 0; i < count; ++i) {
+ uint8_t c2 = nibbles[0];
+
+ const int16_t *book = (c2 & 0xf0) + table;
+ unsigned int rshift = (c2 & 0x0f);
+
+ adpcm_get_predicted_frame(frame, src, nibbles, rshift);
+
+ memcpy(dst, frame, 2 * sizeof(frame[0]));
+ adpcm_decode_upto_8_samples(dst + 2, frame + 2, book, dst , 6);
+ adpcm_decode_upto_8_samples(dst + 8, frame + 8, book, dst + 6, 8);
+ adpcm_decode_upto_8_samples(dst + 16, frame + 16, book, dst + 14, 8);
+ adpcm_decode_upto_8_samples(dst + 24, frame + 24, book, dst + 22, 8);
+
+ if (jump_gap) {
+ nibbles += 8;
+ src += 32;
+ }
+
+ jump_gap = !jump_gap;
+ nibbles += 16;
+ src += 4;
+ dst += 32;
+ }
+}
+
+static int16_t adpcm_get_predicted_sample(uint8_t byte, uint8_t mask,
+ unsigned lshift, unsigned rshift)
+{
+ int16_t sample = ((uint16_t)byte & (uint16_t)mask) << lshift;
+ sample >>= rshift; /* signed */
+ return sample;
+}
+
+static void adpcm_get_predicted_frame(int16_t *dst, const uint8_t *src,
+ const uint8_t *nibbles,
+ unsigned int rshift)
+{
+ unsigned int i;
+
+ *(dst++) = (src[0] << 8) | src[1];
+ *(dst++) = (src[2] << 8) | src[3];
+
+ for (i = 1; i < 16; ++i) {
+ uint8_t byte = nibbles[i];
+
+ *(dst++) = adpcm_get_predicted_sample(byte, 0xf0, 8, rshift);
+ *(dst++) = adpcm_get_predicted_sample(byte, 0x0f, 12, rshift);
+ }
+}
+
+static void adpcm_decode_upto_8_samples(int16_t *dst, const int16_t *src,
+ const int16_t *cb_entry,
+ const int16_t *last_samples,
+ size_t size)
+{
+ const int16_t *const book1 = cb_entry;
+ const int16_t *const book2 = cb_entry + 8;
+
+ const int16_t l1 = last_samples[0];
+ const int16_t l2 = last_samples[1];
+
+ size_t i;
+ int32_t accu;
+
+ for (i = 0; i < size; ++i) {
+ accu = (int32_t)src[i] << 11;
+ accu += book1[i] * l1 + book2[i] * l2 + rdot(i, book2, src);
+ dst[i] = clamp_s16(accu >> 11);
+ }
+}
+
+static void mix_voice_samples(musyx_t *musyx, uint32_t voice_ptr,
+ const int16_t *samples, unsigned segbase,
+ unsigned offset, uint32_t last_sample_ptr)
+{
+ int i, k;
+
+ /* parse VOICE structure */
+ const uint16_t pitch_q16 = *dram_u16(voice_ptr + VOICE_PITCH_Q16);
+ const uint16_t pitch_shift = *dram_u16(voice_ptr + VOICE_PITCH_SHIFT); /* Q4.12 */
+
+ const uint16_t end_point = *dram_u16(voice_ptr + VOICE_END_POINT);
+ const uint16_t restart_point = *dram_u16(voice_ptr + VOICE_RESTART_POINT);
+
+ const uint16_t u16_4e = *dram_u16(voice_ptr + VOICE_U16_4E);
+
+ /* init values and pointers */
+ const int16_t *sample = samples + segbase + offset + u16_4e;
+ const int16_t *const sample_end = samples + segbase + end_point;
+ const int16_t *const sample_restart = samples + (restart_point & 0x7fff) +
+ (((restart_point & 0x8000) != 0) ? 0x000 : segbase);
+
+
+ uint32_t pitch_accu = pitch_q16;
+ uint32_t pitch_step = pitch_shift << 4;
+
+ int32_t v4_env[4];
+ int32_t v4_env_step[4];
+ int16_t *v4_dst[4];
+ int16_t v4[4];
+
+ load_u32((uint32_t *)v4_env, voice_ptr + VOICE_ENV_BEGIN, 4);
+ load_u32((uint32_t *)v4_env_step, voice_ptr + VOICE_ENV_STEP, 4);
+
+ v4_dst[0] = musyx->left;
+ v4_dst[1] = musyx->right;
+ v4_dst[2] = musyx->cc0;
+ v4_dst[3] = musyx->e50;
+
+ DebugMessage(M64MSG_VERBOSE,
+ "Voice debug: segbase=%d"
+ "\tu16_4e=%04x\n"
+ "\tpitch: frac0=%04x shift=%04x\n"
+ "\tend_point=%04x restart_point=%04x\n"
+ "\tenv = %08x %08x %08x %08x\n"
+ "\tenv_step = %08x %08x %08x %08x\n",
+ segbase,
+ u16_4e,
+ pitch_q16, pitch_shift,
+ end_point, restart_point,
+ v4_env[0], v4_env[1], v4_env[2], v4_env[3],
+ v4_env_step[0], v4_env_step[1], v4_env_step[2], v4_env_step[3]);
+
+ for (i = 0; i < SUBFRAME_SIZE; ++i) {
+ /* update sample and resample_lut pointers and then pitch_accu */
+ const int16_t *lut = (int16_t *)(ResampleLUT + ((pitch_accu & 0xfc00) >> 8));
+ int dist;
+ int16_t v;
+
+ sample += (pitch_accu >> 16);
+ pitch_accu &= 0xffff;
+ pitch_accu += pitch_step;
+
+ /* handle end/restart points */
+ dist = sample - sample_end;
+ if (dist >= 0)
+ sample = sample_restart + dist;
+
+ /* apply resample filter */
+ v = clamp_s16(dot4(sample, lut));
+
+ for (k = 0; k < 4; ++k) {
+ /* envmix */
+ int32_t accu = (v * (v4_env[k] >> 16)) >> 15;
+ v4[k] = clamp_s16(accu);
+ *(v4_dst[k]) = clamp_s16(accu + *(v4_dst[k]));
+
+ /* update envelopes and dst pointers */
+ ++(v4_dst[k]);
+ v4_env[k] += v4_env_step[k];
+ }
+ }
+
+ /* save last resampled sample */
+ store_u16((uint16_t *)v4, last_sample_ptr, 4);
+
+ DebugMessage(M64MSG_VERBOSE, "last_sample = %04x %04x %04x %04x",
+ v4[0], v4[1], v4[2], v4[3]);
+}
+
+
+static void sfx_stage(musyx_t *musyx, uint32_t sfx_ptr, uint16_t idx)
+{
+ unsigned int i;
+
+ int16_t buffer[SUBFRAME_SIZE + 4];
+ int16_t *subframe = buffer + 4;
+
+ uint32_t tap_delays[8];
+ int16_t tap_gains[8];
+ int16_t fir4_hcoeffs[4];
+
+ int16_t delayed[SUBFRAME_SIZE];
+ int dpos, dlength;
+
+ const uint32_t pos = idx * SUBFRAME_SIZE;
+
+ uint32_t cbuffer_ptr;
+ uint32_t cbuffer_length;
+ uint16_t tap_count;
+ int16_t fir4_hgain;
+
+ DebugMessage(M64MSG_VERBOSE, "SFX: %08x, idx=%d", sfx_ptr, idx);
+
+ if (sfx_ptr == 0)
+ return;
+
+ /* load sfx parameters */
+ cbuffer_ptr = *dram_u32(sfx_ptr + SFX_CBUFFER_PTR);
+ cbuffer_length = *dram_u32(sfx_ptr + SFX_CBUFFER_LENGTH);
+
+ tap_count = *dram_u16(sfx_ptr + SFX_TAP_COUNT);
+
+ load_u32(tap_delays, sfx_ptr + SFX_TAP_DELAYS, 8);
+ load_u16((uint16_t *)tap_gains, sfx_ptr + SFX_TAP_GAINS, 8);
+
+ fir4_hgain = *dram_u16(sfx_ptr + SFX_FIR4_HGAIN);
+ load_u16((uint16_t *)fir4_hcoeffs, sfx_ptr + SFX_FIR4_HCOEFFS, 4);
+
+ DebugMessage(M64MSG_VERBOSE, "cbuffer: ptr=%08x length=%x", cbuffer_ptr,
+ cbuffer_length);
+
+ DebugMessage(M64MSG_VERBOSE, "fir4: hgain=%04x hcoeff=%04x %04x %04x %04x",
+ fir4_hgain, fir4_hcoeffs[0], fir4_hcoeffs[1], fir4_hcoeffs[2],
+ fir4_hcoeffs[3]);
+
+ DebugMessage(M64MSG_VERBOSE,
+ "tap count=%d\n"
+ "delays: %08x %08x %08x %08x %08x %08x %08x %08x\n"
+ "gains: %04x %04x %04x %04x %04x %04x %04x %04x",
+ tap_count,
+ tap_delays[0], tap_delays[1], tap_delays[2], tap_delays[3],
+ tap_delays[4], tap_delays[5], tap_delays[6], tap_delays[7],
+ tap_gains[0], tap_gains[1], tap_gains[2], tap_gains[3],
+ tap_gains[4], tap_gains[5], tap_gains[6], tap_gains[7]);
+
+ /* mix up to 8 delayed subframes */
+ memset(subframe, 0, SUBFRAME_SIZE * sizeof(subframe[0]));
+ for (i = 0; i < tap_count; ++i) {
+
+ dpos = pos - tap_delays[i];
+ if (dpos <= 0)
+ dpos += cbuffer_length;
+ dlength = SUBFRAME_SIZE;
+
+ if (dpos + SUBFRAME_SIZE > cbuffer_length) {
+ dlength = cbuffer_length - dpos;
+ load_u16((uint16_t *)delayed + dlength, cbuffer_ptr, SUBFRAME_SIZE - dlength);
+ }
+
+ load_u16((uint16_t *)delayed, cbuffer_ptr + dpos * 2, dlength);
+
+ mix_subframes(subframe, delayed, tap_gains[i]);
+ }
+
+ /* add resulting subframe to L/R subframes */
+ for (i = 0; i < SUBFRAME_SIZE; ++i) {
+ int16_t v = subframe[i];
+ musyx->left[i] = clamp_s16(musyx->left[i] + v);
+ musyx->right[i] = clamp_s16(musyx->right[i] + v);
+ }
+
+ /* apply FIR4 filter and writeback filtered result */
+ memcpy(buffer, musyx->subframe_740_last4, 4 * sizeof(int16_t));
+ memcpy(musyx->subframe_740_last4, subframe + SUBFRAME_SIZE - 4, 4 * sizeof(int16_t));
+ mix_fir4(musyx->e50, buffer + 1, fir4_hgain, fir4_hcoeffs);
+ store_u16((uint16_t *)musyx->e50, cbuffer_ptr + pos * 2, SUBFRAME_SIZE);
+}
+
+static void mix_subframes(int16_t *y, const int16_t *x, int16_t hgain)
+{
+ unsigned int i;
+
+ for (i = 0; i < SUBFRAME_SIZE; ++i) {
+ int32_t v = (hgain * x[i]) >> 15;
+ y[i] = clamp_s16(y[i] + v);
+ }
+}
+
+static void mix_fir4(int16_t *y, const int16_t *x, int16_t hgain, const int16_t *hcoeffs)
+{
+ unsigned int i;
+ int32_t h[4];
+
+ h[0] = (hgain * hcoeffs[0]) >> 15;
+ h[1] = (hgain * hcoeffs[1]) >> 15;
+ h[2] = (hgain * hcoeffs[2]) >> 15;
+ h[3] = (hgain * hcoeffs[3]) >> 15;
+
+ for (i = 0; i < SUBFRAME_SIZE; ++i) {
+ int32_t v = (h[0] * x[i] + h[1] * x[i + 1] + h[2] * x[i + 2] + h[3] * x[i + 3]) >> 15;
+ y[i] = clamp_s16(y[i] + v);
+ }
+}
+
+
+static void interleave_stage(musyx_t *musyx, uint32_t output_ptr)
+{
+ size_t i;
+
+ int16_t base_left;
+ int16_t base_right;
+
+ int16_t *left;
+ int16_t *right;
+ uint32_t *dst;
+
+ DebugMessage(M64MSG_VERBOSE, "interleave: %08x", output_ptr);
+
+ base_left = clamp_s16(musyx->base_vol[0]);
+ base_right = clamp_s16(musyx->base_vol[1]);
+
+ left = musyx->left;
+ right = musyx->right;
+ dst = dram_u32(output_ptr);
+
+ for (i = 0; i < SUBFRAME_SIZE; ++i) {
+ uint16_t l = clamp_s16(*(left++) + base_left);
+ uint16_t r = clamp_s16(*(right++) + base_right);
+
+ *(dst++) = (l << 16) | r;
+ }
+}
notaz.gp2x.de / mupen64plus-pandora.git / blobdiff