Index: apps/tree.c =================================================================== --- apps/tree.c (revision 12293) +++ apps/tree.c (working copy) @@ -111,6 +111,7 @@ { "adx", TREE_ATTR_MPA, Icon_Audio, VOICE_EXT_MPA }, { "nsf", TREE_ATTR_MPA, Icon_Audio, VOICE_EXT_MPA }, { "nsfe", TREE_ATTR_MPA, Icon_Audio, VOICE_EXT_MPA }, + { "spc", TREE_ATTR_MPA, Icon_Audio, VOICE_EXT_MPA }, #endif { "m3u", TREE_ATTR_M3U, Icon_Playlist, LANG_PLAYLIST }, { "m3u8", TREE_ATTR_M3U, Icon_Playlist, LANG_PLAYLIST }, Index: apps/metadata.c =================================================================== --- apps/metadata.c (revision 12293) +++ apps/metadata.c (working copy) @@ -2229,7 +2229,10 @@ return false; } break; - + case AFMT_SPC: + track->id3.filesize = filesize(fd); + track->id3.genre = 36; + break; case AFMT_ADX: if (!get_adx_metadata(fd, &(track->id3))) { Index: apps/codecs/spc/Spc_Dsp.h =================================================================== --- apps/codecs/spc/Spc_Dsp.h (revision 0) +++ apps/codecs/spc/Spc_Dsp.h (revision 0) @@ -0,0 +1,969 @@ +enum { voice_count = 8 }; +enum { register_count = 128 }; + +typedef struct raw_voice_t +{ + int8_t volume [2]; + uint8_t rate [2]; + uint8_t waveform; + uint8_t adsr [2]; // envelope rates for attack, decay, and sustain + uint8_t gain; // envelope gain (if not using ADSR) + int8_t envx; // current envelope level + int8_t outx; // current sample + int8_t unused [6]; +} raw_voice_t; + +struct globals_t +{ + int8_t unused1 [12]; + int8_t volume_0; // 0C Main Volume Left (-.7) + int8_t echo_feedback; // 0D Echo Feedback (-.7) + int8_t unused2 [14]; + int8_t volume_1; // 1C Main Volume Right (-.7) + int8_t unused3 [15]; + int8_t echo_volume_0; // 2C Echo Volume Left (-.7) + uint8_t pitch_mods; // 2D Pitch Modulation on/off for each voice + int8_t unused4 [14]; + int8_t echo_volume_1; // 3C Echo Volume Right (-.7) + uint8_t noise_enables; // 3D Noise output on/off for each voice + int8_t unused5 [14]; + uint8_t key_ons; // 4C Key On for each voice + uint8_t echo_ons; // 4D Echo on/off for each voice + int8_t unused6 [14]; + uint8_t key_offs; // 5C key off for each voice (instantiates release mode) + uint8_t wave_page; // 5D source directory (wave table offsets) + int8_t unused7 [14]; + uint8_t flags; // 6C flags and noise freq + uint8_t echo_page; // 6D + int8_t unused8 [14]; + uint8_t wave_ended; // 7C + uint8_t echo_delay; // 7D ms >> 4 + char unused9 [2]; +}; + +enum state_t { // -1, 0, +1 allows more efficient if statements + state_decay = -1, + state_sustain = 0, + state_attack = +1, + state_release = 2 +}; + +typedef struct cache_entry_t +{ + int16_t const* samples; + unsigned end; // past-the-end position + unsigned loop; // number of samples in loop + unsigned start_addr; +} cache_entry_t; + +enum { brr_block_size = 16 }; + +typedef struct voice_t +{ +#if SPC_BRRCACHE + int16_t const* samples; + long wave_end; + int wave_loop; +#else + int16_t samples [3 + brr_block_size + 1]; + int block_header; // header byte from current block +#endif + uint8_t const* addr; + short volume [2]; + long position;// position in samples buffer, with 12-bit fraction + short envx; + short env_mode; + short env_timer; + short key_on_delay; +} voice_t; + +#if SPC_BRRCACHE +static int16_t BRRcache [0x20000 + 32]; // a little extra for samples that go past end +#endif + +enum { fir_buf_half = 8 }; + +typedef struct Spc_Dsp +{ + union + { + raw_voice_t voice [voice_count]; + uint8_t reg [register_count]; + struct globals_t g; + int16_t align; + } r; + + unsigned echo_pos; + int keys_down; + int noise_count; + uint16_t noise; // also read as int16_t + + // fir_buf [i + 8] == fir_buf [i], to avoid wrap checking in FIR code + int fir_pos; // (0 to 7) + int fir_buf [fir_buf_half * 2] [2]; + int fir_coeff [voice_count]; // copy of echo FIR constants as int, for faster access + + voice_t voice_state [voice_count]; + +#if SPC_BRRCACHE + uint8_t oldsize; + cache_entry_t wave_entry [256]; + cache_entry_t wave_entry_old [256]; +#endif +} Spc_Dsp; + +typedef struct src_dir +{ + char start [2]; + char loop [2]; +} src_dir; + +static void DSP_reset( Spc_Dsp* this ) +{ + this->keys_down = 0; + this->echo_pos = 0; + this->noise_count = 0; + this->noise = 2; + this->fir_pos = 0; + + this->r.g.flags = 0xE0; // reset, mute, echo off + this->r.g.key_ons = 0; + + memset( this->voice_state, 0, sizeof this->voice_state ); + + int i; + for ( i = voice_count; --i >= 0; ) + { + voice_t* v = this->voice_state + i; + v->env_mode = state_release; + v->addr = ram.ram; + } + + #if SPC_BRRCACHE + this->oldsize = 0; + for ( i = 0; i < 256; i++ ) + this->wave_entry [i].start_addr = -1; + #endif + + memset( this->fir_buf, 0, sizeof this->fir_buf ); + assert( offsetof (struct globals_t,unused9 [2]) == register_count ); + assert( sizeof (this->r.voice) == register_count ); +} + +static void DSP_write( Spc_Dsp* this, int i, int data ) ICODE_ATTR; +static void DSP_write( Spc_Dsp* this, int i, int data ) +{ + assert( (unsigned) i < register_count ); + + this->r.reg [i] = data; + int high = i >> 4; + int low = i & 0x0F; + if ( low < 2 ) // voice volumes + { + int left = *(int8_t const*) &this->r.reg [i & ~1]; + int right = *(int8_t const*) &this->r.reg [i | 1]; + voice_t* v = this->voice_state + high; + v->volume [0] = left; + v->volume [1] = right; + } + else if ( low == 0x0F ) // fir coefficients + { + this->fir_coeff [7 - high] = (int8_t) data; // sign-extend + } +} + +static inline int DSP_read( Spc_Dsp* this, int i ) +{ + assert( (unsigned) i < register_count ); + return this->r.reg [i]; +} + +// if ( n < -32768 ) out = -32768; +// if ( n > 32767 ) out = 32767; +#define CLAMP16( n, out )\ +{\ + if ( (int16_t) n != n )\ + out = 0x7FFF ^ (n >> 31);\ +} + +#if SPC_BRRCACHE +static void decode_brr( Spc_Dsp* this, unsigned start_addr, voice_t* voice, raw_voice_t const* const raw_voice ) ICODE_ATTR; +static void decode_brr( Spc_Dsp* this, unsigned start_addr, voice_t* voice, raw_voice_t const* const raw_voice ) +{ + // setup same variables as where decode_brr() is called from + #undef RAM + #define RAM ram.ram + src_dir const* const sd = (src_dir*) &RAM [this->r.g.wave_page * 0x100]; + cache_entry_t* const wave_entry = &this->wave_entry [raw_voice->waveform]; + + // the following block can be put in place of the call to decode_brr() below + { + DEBUGF( "decode at %08x (wave #%d)\n", start_addr, raw_voice->waveform ); + + // see if in cache + int i; + for ( i = 0; i < this->oldsize; i++ ) + { + cache_entry_t* e = &this->wave_entry_old [i]; + if ( e->start_addr == start_addr ) + { + DEBUGF( "found in wave_entry_old (oldsize=%d)\n", this->oldsize ); + *wave_entry = *e; + goto wave_in_cache; + } + } + + wave_entry->start_addr = start_addr; + + uint8_t const* const loop_ptr = RAM + GET_LE16A( sd [raw_voice->waveform].loop ); + short* loop_start = 0; + + short* out = BRRcache + start_addr * 2; + wave_entry->samples = out; + *out++ = 0; + int smp1 = 0; + int smp2 = 0; + + uint8_t const* addr = RAM + start_addr; + int block_header; + do + { + if ( addr == loop_ptr ) + { + loop_start = out; + DEBUGF( "loop at %08x (wave #%d)\n", addr - RAM, raw_voice->waveform ); + } + + // header + block_header = *addr; + addr += 9; + voice->addr = addr; + int const filter = (block_header & 0x0C) - 0x08; + + // scaling (invalid scaling gives -4096 for neg nybble, 0 for pos) + static unsigned char const right_shifts [16] = { + 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 29, 29, 29, + }; + static unsigned char const left_shifts [16] = { + 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 11, 11 + }; + int const scale = block_header >> 4; + int const right_shift = right_shifts [scale]; + int const left_shift = left_shifts [scale]; + + // output position + out += brr_block_size; + int offset = -brr_block_size << 2; + + do // decode and filter 16 samples + { + // Get nybble, sign-extend, then scale + // get byte, select which nybble, sign-extend, then shift based + // on scaling. also handles invalid scaling values. + int delta = (int) (int8_t) (addr [offset >> 3] << (offset & 4)) >> + right_shift << left_shift; + + out [offset >> 2] = smp2; + + if ( filter == 0 ) // mode 0x08 (30-90% of the time) + { + delta -= smp2 >> 1; + delta += smp2 >> 5; + smp2 = smp1; + delta += smp1; + delta += (-smp1 - (smp1 >> 1)) >> 5; + } + else + { + if ( filter == -4 ) // mode 0x04 + { + delta += smp1 >> 1; + delta += (-smp1) >> 5; + } + else if ( filter > -4 ) // mode 0x0C + { + delta -= smp2 >> 1; + delta += (smp2 + (smp2 >> 1)) >> 4; + delta += smp1; + delta += (-smp1 * 13) >> 7; + } + smp2 = smp1; + } + + CLAMP16( delta, delta ); + smp1 = (int16_t) (delta * 2); // sign-extend + } + while ( (offset += 4) != 0 ); + + // if next block has end flag set, this block ends early (verified) + if ( (block_header & 3) != 3 && (*addr & 3) == 1 ) + { + // skip last 9 samples + out -= 9; + goto early_end; + } + } + while ( !(block_header & 1) && addr < RAM + 0x10000 ); + + out [0] = smp2; + out [1] = smp1; + + early_end: + wave_entry->end = (out - 1 - wave_entry->samples) << 12; + + wave_entry->loop = 0; + if ( (block_header & 2) ) + { + if ( loop_start ) + { + int loop = out - loop_start; + wave_entry->loop = loop; + wave_entry->end += 0x3000; + out [2] = loop_start [2]; + out [3] = loop_start [3]; + out [4] = loop_start [4]; + } + else + { + DEBUGF( "loop point outside initial wave\n" ); + } + } + + DEBUGF( "end at %08x (wave #%d)\n", addr - RAM, raw_voice->waveform ); + + // add to cache + this->wave_entry_old [this->oldsize++] = *wave_entry; +wave_in_cache:; + } +} +#endif + +static void key_on(Spc_Dsp* const this, voice_t* const voice, src_dir const* const sd, raw_voice_t const* const raw_voice, const int key_on_delay, const int vbit) { + #undef RAM + #define RAM ram.ram + int const env_rate_init = 0x7800; + voice->key_on_delay = key_on_delay; + if ( key_on_delay == 0 ) + { + this->keys_down |= vbit; + voice->envx = 0; + voice->env_mode = state_attack; + voice->env_timer = env_rate_init; // TODO: inaccurate? + unsigned start_addr = GET_LE16A( sd [raw_voice->waveform].start ); + #if !SPC_BRRCACHE + { + voice->addr = RAM + start_addr; + voice->samples [brr_block_size + 1] = 0; // BRR filter uses previous samples + voice->samples [brr_block_size + 2] = 0; + voice->position = (brr_block_size + 3) * 0x1000 - 1; // decode three samples immediately + voice->block_header = 0; // "previous" BRR header + } + #else + { + voice->position = 3 * 0x1000 - 1; + cache_entry_t* const wave_entry = &this->wave_entry [raw_voice->waveform]; + + // predecode BRR if not already + if ( wave_entry->start_addr != start_addr ) + { + // the following line can be replaced by the indicated block + // in decode_brr() + decode_brr( this, start_addr, voice, raw_voice ); + } + + voice->samples = wave_entry->samples; + voice->wave_end = wave_entry->end; + voice->wave_loop = wave_entry->loop; + } + #endif + } +} + +static void DSP_run_( Spc_Dsp* this, long count, sample_t* out_buf ) ICODE_ATTR; +static void DSP_run_( Spc_Dsp* this, long count, sample_t* out_buf ) +{ + #undef RAM +#ifdef CPU_ARM + uint8_t* const ram_ = ram.ram; + #define RAM ram_ +#else + #define RAM ram.ram +#endif + //EXIT_TIMER(cpu); + //ENTER_TIMER(dsp); + + // Here we check for keys on/off. Docs say that successive writes + // to KON/KOF must be separated by at least 2 Ts periods or risk + // being neglected. Therefore DSP only looks at these during an + // update, and not at the time of the write. Only need to do this + // once however, since the regs haven't changed over the whole + // period we need to catch up with. + + { + int key_ons = this->r.g.key_ons; + int key_offs = this->r.g.key_offs; + this->r.g.wave_ended &= ~key_ons; // keying on a voice resets that bit in ENDX + this->r.g.key_ons = key_ons & key_offs; // key_off bits prevent key_on from being acknowledged + + // process key events outside loop, since they won't re-occur + voice_t* voice = this->voice_state + 8; + int vbit = 0x80; + do + { + --voice; + if ( key_offs & vbit ) + { + voice->env_mode = state_release; + voice->key_on_delay = 0; + } + else if ( key_ons & vbit ) + { + voice->key_on_delay = 8; + } + } + while ( (vbit >>= 1) != 0 ); + } + + src_dir const* const sd = (src_dir*) &RAM [this->r.g.wave_page * 0x100]; + +#if !SPC_NOINTERP + int const slow_gaussian = (this->r.g.pitch_mods >> 1) | this->r.g.noise_enables; +#endif + int const global_muting = ((this->r.g.flags & 0x40) >> 2) + 14; // (g.flags & 0x40) ? 30 : 14 + + int const global_vol_0 = this->r.g.volume_0; + int const global_vol_1 = this->r.g.volume_1; + + // each rate divides exactly into 0x7800 without remainder + int const env_rate_init = 0x7800; + static unsigned short const env_rates [0x20] = + { + 0x0000, 0x000F, 0x0014, 0x0018, 0x001E, 0x0028, 0x0030, 0x003C, + 0x0050, 0x0060, 0x0078, 0x00A0, 0x00C0, 0x00F0, 0x0140, 0x0180, + 0x01E0, 0x0280, 0x0300, 0x03C0, 0x0500, 0x0600, 0x0780, 0x0A00, + 0x0C00, 0x0F00, 0x1400, 0x1800, 0x1E00, 0x2800, 0x3C00, 0x7800 + }; + + do // one pair of output samples per iteration + { + // Noise + if ( this->r.g.noise_enables ) + { + if ( (this->noise_count -= env_rates [this->r.g.flags & 0x1F]) <= 0 ) + { + this->noise_count = env_rate_init; + int feedback = (this->noise << 13) ^ (this->noise << 14); + this->noise = (feedback & 0x8000) ^ (this->noise >> 1 & ~1); + } + } + +#if !SPC_NOECHO + int echo_0 = 0; + int echo_1 = 0; +#endif + long prev_outx = 0; // TODO: correct value for first channel? + int chans_0 = 0; + int chans_1 = 0; + raw_voice_t * raw_voice = this->r.voice; // TODO: put raw_voice pointer in voice_t? + voice_t* voice = this->voice_state; + int vbit = 1; + for ( ; vbit < 0x100; vbit <<= 1, ++voice, ++raw_voice ) + { + /* pregen involves checking keyon, etc */ + //ENTER_TIMER(dsp_pregen); + + // Key on events are delayed + int key_on_delay = voice->key_on_delay; + + if ( --key_on_delay >= 0 ) // <1% of the time + { + key_on(this,voice,sd,raw_voice,key_on_delay,vbit); + } + + if ( !(this->keys_down & vbit) ) // Silent channel + { + silent_chan: + raw_voice->envx = 0; + raw_voice->outx = 0; + prev_outx = 0; + continue; + } + + // Envelope + { + int const env_range = 0x800; + int env_mode = voice->env_mode; + int adsr0 = raw_voice->adsr [0]; + int env_timer; + if ( env_mode != state_release ) // 99% of the time + { + env_timer = voice->env_timer; + if ( adsr0 & 0x80 ) // 79% of the time + { + int adsr1 = raw_voice->adsr [1]; + if ( env_mode == state_sustain ) // 74% of the time + { + if ( (env_timer -= env_rates [adsr1 & 0x1F]) > 0 ) + goto write_env_timer; + + int envx = voice->envx; + envx--; // envx *= 255 / 256 + envx -= envx >> 8; + voice->envx = envx; + raw_voice->envx = envx >> 4; // TODO: should this be 8? + goto init_env_timer; + } + else if ( env_mode < 0 ) // 25% state_decay + { + int envx = voice->envx; + if ( (env_timer -= env_rates [(adsr0 >> 3 & 0x0E) + 0x10]) <= 0 ) + { + envx--; // envx *= 255 / 256 + envx -= envx >> 8; + voice->envx = envx; + raw_voice->envx = envx >> 4; // TODO: should this be 8? + env_timer = env_rate_init; + } + + int sustain_level = adsr1 >> 5; + if ( envx <= (sustain_level + 1) * 0x100 ) + voice->env_mode = state_sustain; + + goto write_env_timer; + } + else // state_attack + { + int t = adsr0 & 0x0F; + if ( (env_timer -= env_rates [t * 2 + 1]) > 0 ) + goto write_env_timer; + + int envx = voice->envx; + + int const step = env_range / 64; + envx += step; + if ( t == 15 ) + envx += env_range / 2 - step; + + if ( envx >= env_range ) + { + envx = env_range - 1; + voice->env_mode = state_decay; + } + voice->envx = envx; + raw_voice->envx = envx >> 4; // TODO: should this be 8? + goto init_env_timer; + } + } + else // gain mode + { + int t = raw_voice->gain; + if ( t < 0x80 ) + { + raw_voice->envx = t; + voice->envx = t << 4; + goto env_end; + } + else + { + if ( (env_timer -= env_rates [t & 0x1F]) > 0 ) + goto write_env_timer; + + int envx = voice->envx; + int mode = t >> 5; + if ( mode <= 5 ) // decay + { + int step = env_range / 64; + if ( mode == 5 ) // exponential + { + envx--; // envx *= 255 / 256 + step = envx >> 8; + } + if ( (envx -= step) < 0 ) + { + envx = 0; + if ( voice->env_mode == state_attack ) + voice->env_mode = state_decay; + } + } + else // attack + { + int const step = env_range / 64; + envx += step; + if ( mode == 7 && envx >= env_range * 3 / 4 + step ) + envx += env_range / 256 - step; + + if ( envx >= env_range ) + envx = env_range - 1; + } + voice->envx = envx; + raw_voice->envx = envx >> 4; // TODO: should this be 8? + goto init_env_timer; + } + } + } + else // state_release + { + int envx = voice->envx; + if ( (envx -= env_range / 256) > 0 ) + { + voice->envx = envx; + raw_voice->envx = envx >> 8; + goto env_end; + } + else + { + this->keys_down ^= vbit; // bit was set, so this clears it + voice->envx = 0; + goto silent_chan; + } + } + init_env_timer: + env_timer = env_rate_init; + write_env_timer: + voice->env_timer = env_timer; + env_end:; + } + + //EXIT_TIMER(dsp_pregen); + + //ENTER_TIMER(dsp_gen); + + #if !SPC_BRRCACHE + if ( voice->position >= brr_block_size * 0x1000 ) // Decode BRR block + { + voice->position -= brr_block_size * 0x1000; + + uint8_t const* addr = voice->addr; + if ( addr >= RAM + 0x10000 ) + addr -= 0x10000; + + // action based on previous block's header + if ( voice->block_header & 1 ) + { + addr = RAM + GET_LE16A( sd [raw_voice->waveform].loop ); + this->r.g.wave_ended |= vbit; + if ( !(voice->block_header & 2) ) // 1% of the time + { + // first block was end block; don't play anything (verified) + this->keys_down ^= vbit; // bit was set, so this clears it + + // since voice->envx is 0, samples and position don't matter + raw_voice->envx = 0; + voice->envx = 0; + goto skip_decode; + } + } + + // header + int const block_header = *addr; + addr += 9; + voice->addr = addr; + voice->block_header = block_header; + int const filter = (block_header & 0x0C) - 0x08; + + // scaling (invalid scaling gives -4096 for neg nybble, 0 for pos) + static unsigned char const right_shifts [16] = { + 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 29, 29, 29, + }; + static unsigned char const left_shifts [16] = { + 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 11, 11 + }; + int const scale = block_header >> 4; + int const right_shift = right_shifts [scale]; + int const left_shift = left_shifts [scale]; + + // previous samples + int smp2 = voice->samples [brr_block_size + 1]; + int smp1 = voice->samples [brr_block_size + 2]; + voice->samples [0] = voice->samples [brr_block_size]; + + // output position + short* out = voice->samples + (1 + brr_block_size); + int offset = -brr_block_size << 2; + + // if next block has end flag set, this block ends early (verified) + if ( (block_header & 3) != 3 && (*addr & 3) == 1 ) + { + // arrange for last 9 samples to be skipped + int const skip = 9; + out += (skip & 1); + voice->samples [skip] = voice->samples [brr_block_size]; + voice->position += skip * 0x1000; + offset = (-brr_block_size + (skip & ~1)) << 2; + addr -= skip / 2; + voice->block_header = 1; // force sample to end on next decode + } + + do // decode and filter 16 samples + { + // Get nybble, sign-extend, then scale + // get byte, select which nybble, sign-extend, then shift based + // on scaling. also handles invalid scaling values. + int delta = (int) (int8_t) (addr [offset >> 3] << (offset & 4)) >> + right_shift << left_shift; + + out [offset >> 2] = smp2; + + if ( filter == 0 ) // mode 0x08 (30-90% of the time) + { + delta -= smp2 >> 1; + delta += smp2 >> 5; + smp2 = smp1; + delta += smp1; + delta += (-smp1 - (smp1 >> 1)) >> 5; + } + else + { + if ( filter == -4 ) // mode 0x04 + { + delta += smp1 >> 1; + delta += (-smp1) >> 5; + } + else if ( filter > -4 ) // mode 0x0C + { + delta -= smp2 >> 1; + delta += (smp2 + (smp2 >> 1)) >> 4; + delta += smp1; + delta += (-smp1 * 13) >> 7; + } + smp2 = smp1; + } + + CLAMP16( delta, delta ); + smp1 = (int16_t) (delta * 2); // sign-extend + } + while ( (offset += 4) != 0 ); + + out [0] = smp2; + out [1] = smp1; + + skip_decode:; + } + #endif + + // Get rate (with possible modulation) + int rate = GET_LE16A( raw_voice->rate ) & 0x3FFF; + if ( this->r.g.pitch_mods & vbit ) + rate = (rate * (prev_outx + 32768)) >> 15; + + #if !SPC_NOINTERP + // Interleved gauss table (to improve cache coherency). + // gauss [i * 2 + j] = normal_gauss [(1 - j) * 256 + i] + static short const gauss [512] = + { + 370,1305, 366,1305, 362,1304, 358,1304, 354,1304, 351,1304, 347,1304, 343,1303, + 339,1303, 336,1303, 332,1302, 328,1302, 325,1301, 321,1300, 318,1300, 314,1299, + 311,1298, 307,1297, 304,1297, 300,1296, 297,1295, 293,1294, 290,1293, 286,1292, + 283,1291, 280,1290, 276,1288, 273,1287, 270,1286, 267,1284, 263,1283, 260,1282, + 257,1280, 254,1279, 251,1277, 248,1275, 245,1274, 242,1272, 239,1270, 236,1269, + 233,1267, 230,1265, 227,1263, 224,1261, 221,1259, 218,1257, 215,1255, 212,1253, + 210,1251, 207,1248, 204,1246, 201,1244, 199,1241, 196,1239, 193,1237, 191,1234, + 188,1232, 186,1229, 183,1227, 180,1224, 178,1221, 175,1219, 173,1216, 171,1213, + 168,1210, 166,1207, 163,1205, 161,1202, 159,1199, 156,1196, 154,1193, 152,1190, + 150,1186, 147,1183, 145,1180, 143,1177, 141,1174, 139,1170, 137,1167, 134,1164, + 132,1160, 130,1157, 128,1153, 126,1150, 124,1146, 122,1143, 120,1139, 118,1136, + 117,1132, 115,1128, 113,1125, 111,1121, 109,1117, 107,1113, 106,1109, 104,1106, + 102,1102, 100,1098, 99,1094, 97,1090, 95,1086, 94,1082, 92,1078, 90,1074, + 89,1070, 87,1066, 86,1061, 84,1057, 83,1053, 81,1049, 80,1045, 78,1040, + 77,1036, 76,1032, 74,1027, 73,1023, 71,1019, 70,1014, 69,1010, 67,1005, + 66,1001, 65, 997, 64, 992, 62, 988, 61, 983, 60, 978, 59, 974, 58, 969, + 56, 965, 55, 960, 54, 955, 53, 951, 52, 946, 51, 941, 50, 937, 49, 932, + 48, 927, 47, 923, 46, 918, 45, 913, 44, 908, 43, 904, 42, 899, 41, 894, + 40, 889, 39, 884, 38, 880, 37, 875, 36, 870, 36, 865, 35, 860, 34, 855, + 33, 851, 32, 846, 32, 841, 31, 836, 30, 831, 29, 826, 29, 821, 28, 816, + 27, 811, 27, 806, 26, 802, 25, 797, 24, 792, 24, 787, 23, 782, 23, 777, + 22, 772, 21, 767, 21, 762, 20, 757, 20, 752, 19, 747, 19, 742, 18, 737, + 17, 732, 17, 728, 16, 723, 16, 718, 15, 713, 15, 708, 15, 703, 14, 698, + 14, 693, 13, 688, 13, 683, 12, 678, 12, 674, 11, 669, 11, 664, 11, 659, + 10, 654, 10, 649, 10, 644, 9, 640, 9, 635, 9, 630, 8, 625, 8, 620, + 8, 615, 7, 611, 7, 606, 7, 601, 6, 596, 6, 592, 6, 587, 6, 582, + 5, 577, 5, 573, 5, 568, 5, 563, 4, 559, 4, 554, 4, 550, 4, 545, + 4, 540, 3, 536, 3, 531, 3, 527, 3, 522, 3, 517, 2, 513, 2, 508, + 2, 504, 2, 499, 2, 495, 2, 491, 2, 486, 1, 482, 1, 477, 1, 473, + 1, 469, 1, 464, 1, 460, 1, 456, 1, 451, 1, 447, 1, 443, 1, 439, + 0, 434, 0, 430, 0, 426, 0, 422, 0, 418, 0, 414, 0, 410, 0, 405, + 0, 401, 0, 397, 0, 393, 0, 389, 0, 385, 0, 381, 0, 378, 0, 374, + }; + + // Gaussian interpolation using most recent 4 samples + long position = voice->position; + voice->position += rate; + short const* interp = voice->samples + (position >> 12); + int offset = position >> 4 & 0xFF; + + // Only left half of gaussian kernel is in table, so we must mirror for right half + short const* fwd = gauss + offset * 2; + short const* rev = gauss + 510 - offset * 2; + + // Use faster gaussian interpolation when exact result isn't needed by pitch + // modulator of next channel + int amp_0, amp_1; + if ( !(slow_gaussian & vbit) ) // 99% of the time + { + // Main optimization is lack of clamping. Not a problem since output + // never goes more than +/- 16 outside 16-bit range and things are + // clamped later anyway. Other optimization is to preserve fractional + // accuracy, eliminating several masks. + int output = (((fwd [0] * interp [0] + + fwd [1] * interp [1] + + rev [1] * interp [2] + + rev [0] * interp [3] ) >> 11) * voice->envx) >> 11; + + // duplicated here to give compiler more to run in parallel + amp_0 = voice->volume [0] * output; + amp_1 = voice->volume [1] * output; + raw_voice->outx = output >> 8; + } + else + { + int output = *(int16_t*) &this->noise; + if ( !(this->r.g.noise_enables & vbit) ) + { + output = (fwd [0] * interp [0]) & ~0xFFF; + output = (output + fwd [1] * interp [1]) & ~0xFFF; + output = (output + rev [1] * interp [2]) >> 12; + output = (int16_t) (output * 2); + output += ((rev [0] * interp [3]) >> 12) * 2; + CLAMP16( output, output ); + } + output = (output * voice->envx) >> 11 & ~1; + + // duplicated here to give compiler more to run in parallel + amp_0 = voice->volume [0] * output; + amp_1 = voice->volume [1] * output; + prev_outx = output; + raw_voice->outx = (int8_t) (output >> 8); + } + #else + // two-point linear interpolation + int fraction = voice->position & 0xFFF; + short const* const pos = voice->samples + (voice->position >> 12); + voice->position += rate; + int output = (pos [2] * fraction + pos [1] * (0x1000 - fraction)) >> 12; + //int output = pos [0]; // no interpolation (hardly faster, and crappy sounding) + if ( this->r.g.noise_enables & vbit ) + output = *(int16_t*) &this->noise; + + output = (output * voice->envx) >> 11; + + // duplicated here to give compiler more to run in parallel + int amp_0 = voice->volume [0] * output; + int amp_1 = voice->volume [1] * output; + prev_outx = output; + raw_voice->outx = (int8_t) (output >> 8); + #endif + + #if SPC_BRRCACHE + if ( voice->position >= voice->wave_end ) + { + long loop_len = voice->wave_loop << 12; + voice->position -= loop_len; + this->r.g.wave_ended |= vbit; + if ( !loop_len ) + { + this->keys_down ^= vbit; + raw_voice->envx = 0; + voice->envx = 0; + } + } + #endif + + //EXIT_TIMER(dsp_gen); + + //ENTER_TIMER(dsp_mix); + + chans_0 += amp_0; + chans_1 += amp_1; + #if !SPC_NOECHO + if ( this->r.g.echo_ons & vbit ) + { + echo_0 += amp_0; + echo_1 += amp_1; + } + #endif + + //EXIT_TIMER(dsp_mix); + } + // end of voice loop + + #if !SPC_NOECHO + // Read feedback from echo buffer + int echo_pos = this->echo_pos; + uint8_t* const echo_ptr = RAM + + ((this->r.g.echo_page * 0x100 + echo_pos) & 0xFFFF); + echo_pos += 4; + if ( echo_pos >= (this->r.g.echo_delay & 15) * 0x800 ) + echo_pos = 0; + this->echo_pos = echo_pos; + int fb_0 = GET_LE16SA( echo_ptr ); + int fb_1 = GET_LE16SA( echo_ptr + 2 ); + + // Keep last 8 samples + int (* const fir_ptr) [2] = this->fir_buf + this->fir_pos; + this->fir_pos = (this->fir_pos + 1) & (fir_buf_half - 1); + fir_ptr [ 0] [0] = fb_0; + fir_ptr [ 0] [1] = fb_1; + fir_ptr [fir_buf_half] [0] = fb_0; // duplicate at +8 eliminates wrap checking below + fir_ptr [fir_buf_half] [1] = fb_1; + + // Apply FIR + fb_0 *= this->fir_coeff [0]; + fb_1 *= this->fir_coeff [0]; + + #define DO_PT( i )\ + fb_0 += fir_ptr [i] [0] * this->fir_coeff [i];\ + fb_1 += fir_ptr [i] [1] * this->fir_coeff [i]; + + DO_PT( 1 ) + DO_PT( 2 ) + DO_PT( 3 ) + DO_PT( 4 ) + DO_PT( 5 ) + DO_PT( 6 ) + DO_PT( 7 ) + + // Generate output + int amp_0 = (chans_0 * global_vol_0 + fb_0 * this->r.g.echo_volume_0) >> global_muting; + int amp_1 = (chans_1 * global_vol_1 + fb_1 * this->r.g.echo_volume_1) >> global_muting; + CLAMP16( amp_0, amp_0 ); + out_buf [0] = amp_0 * (1 << 8); + CLAMP16( amp_1, amp_1 ); + out_buf [WAV_CHUNK_SIZE] = amp_1 * (1 << 8); + out_buf ++; + + // Feedback into echo buffer + int e0 = (echo_0 >> 7) + ((fb_0 * this->r.g.echo_feedback) >> 14); + int e1 = (echo_1 >> 7) + ((fb_1 * this->r.g.echo_feedback) >> 14); + if ( !(this->r.g.flags & 0x20) ) + { + CLAMP16( e0, e0 ); + SET_LE16A( echo_ptr , e0 ); + CLAMP16( e1, e1 ); + SET_LE16A( echo_ptr + 2, e1 ); + } + #else + // Generate output + int amp_0 = (chans_0 * global_vol_0) >> global_muting; + int amp_1 = (chans_1 * global_vol_1) >> global_muting; + CLAMP16( amp_0, amp_0 ); + out_buf [0] = amp_0 * (1 << 8); + CLAMP16( amp_1, amp_1 ); + out_buf [WAV_CHUNK_SIZE] = amp_1 * (1 << 8); + out_buf ++; + #endif + } + while ( --count ); + + //EXIT_TIMER(dsp); + //ENTER_TIMER(cpu); +} + +static inline void DSP_run( Spc_Dsp* this, long count, sample_t* out ) +{ + // Should we just fill the buffer with silence? Flags won't be cleared + // during this run so it seems it should keep resetting every sample. + if ( this->r.g.flags & 0x80 ) + DSP_reset( this ); + + DSP_run_( this, count, out ); +} Index: apps/codecs/spc/Spc_Cpu.h =================================================================== --- apps/codecs/spc/Spc_Cpu.h (revision 0) +++ apps/codecs/spc/Spc_Cpu.h (revision 0) @@ -0,0 +1,1006 @@ +#define READ( addr ) (SPC_read( this, addr, spc_time_ )) +#define WRITE( addr, value ) (SPC_write( this, addr, value, spc_time_ )) + +#define READ_DP( addr ) READ( (addr) + dp ) +#define WRITE_DP( addr, value ) WRITE( (addr) + dp, value ) + +#define READ_PROG16( addr ) GET_LE16( RAM + (addr) ) + +#define READ_PC( pc ) (*(pc)) +#define READ_PC16( pc ) GET_LE16( pc ) + +#define SET_PC( n ) (pc = RAM + (n)) +#define GET_PC() (pc - RAM) + +static unsigned char const cycle_table [0x100] = { + 2,8,4,5,3,4,3,6,2,6,5,4,5,4,6,8, // 0 + 2,8,4,5,4,5,5,6,5,5,6,5,2,2,4,6, // 1 + 2,8,4,5,3,4,3,6,2,6,5,4,5,4,5,4, // 2 + 2,8,4,5,4,5,5,6,5,5,6,5,2,2,3,8, // 3 + 2,8,4,5,3,4,3,6,2,6,4,4,5,4,6,6, // 4 + 2,8,4,5,4,5,5,6,5,5,4,5,2,2,4,3, // 5 + 2,8,4,5,3,4,3,6,2,6,4,4,5,4,5,5, // 6 + 2,8,4,5,4,5,5,6,5,5,5,5,2,2,3,6, // 7 + 2,8,4,5,3,4,3,6,2,6,5,4,5,2,4,5, // 8 + 2,8,4,5,4,5,5,6,5,5,5,5,2,2,12,5,// 9 + 3,8,4,5,3,4,3,6,2,6,4,4,5,2,4,4, // A + 2,8,4,5,4,5,5,6,5,5,5,5,2,2,3,4, // B + 3,8,4,5,4,5,4,7,2,5,6,4,5,2,4,9, // C + 2,8,4,5,5,6,6,7,4,5,4,5,2,2,6,3, // D + 2,8,4,5,3,4,3,6,2,4,5,3,4,3,4,3, // E + 2,8,4,5,4,5,5,6,3,4,5,4,2,2,4,3 // F +}; + +#define MEM_BIT() CPU_mem_bit( this, pc, spc_time_ ) + +static unsigned CPU_mem_bit( THIS, uint8_t const* pc, spc_time_t const spc_time_ ) ICODE_ATTR; + +static unsigned CPU_mem_bit( THIS, uint8_t const* pc, spc_time_t const spc_time_ ) +{ + unsigned addr = READ_PC16( pc ); + unsigned t = READ( addr & 0x1FFF ) >> (addr >> 13); + return (t << 8) & 0x100; +} + +// status flags +enum { st_n = 0x80 }; +enum { st_v = 0x40 }; +enum { st_p = 0x20 }; +enum { st_b = 0x10 }; +enum { st_h = 0x08 }; +enum { st_i = 0x04 }; +enum { st_z = 0x02 }; +enum { st_c = 0x01 }; + +#define IS_NEG (nz & 0x880) + +#define CALC_STATUS( out )\ +{\ + out = status & ~(st_n | st_z | st_c);\ + out |= (c >> 8) & st_c;\ + out |= (dp >> 3) & st_p;\ + if ( IS_NEG ) out |= st_n;\ + if ( !(nz & 0xFF) ) out |= st_z;\ +} + +#define SET_STATUS( in )\ +{\ + status = in & ~(st_n | st_z | st_c | st_p);\ + c = in << 8;\ + nz = ((in << 4) & 0x800) | (~in & st_z);\ + dp = (in << 3) & 0x100;\ +} + + +// stack +#define PUSH( v ) (*--sp = (uint8_t) (v)) +#define PUSH16( v ) (sp -= 2, SET_LE16( sp, v )) +#define POP() (*sp++) +#define SET_SP( v ) (sp = RAM + 0x101 + (v)) +#define GET_SP() (sp - 0x101 - RAM) + +static spc_time_t CPU_run( THIS, spc_time_t start_time ) ICODE_ATTR; + +static spc_time_t CPU_run( THIS, spc_time_t start_time ) +{ + //ENTER_TIMER(cpu); + + register spc_time_t spc_time_ = start_time; + +#ifdef CPU_ARM + uint8_t* const ram_ = ram.ram; + #undef RAM + #define RAM ram_ +#endif + + int a = this->r.a; + int x = this->r.x; + int y = this->r.y; + + uint8_t const* pc; + SET_PC( this->r.pc ); + + uint8_t* sp; + SET_SP( this->r.sp ); + + int status; + int c; + int nz; + unsigned dp; + { + int temp = this->r.status; + SET_STATUS( temp ); + } + + goto loop; + + // main loop +cbranch_taken_loop: + pc += *(int8_t const*) pc; + spc_time_ += 2; +inc_pc_loop: + pc++; +loop: + check( (unsigned) GET_PC() < 0x10000 ); + check( (unsigned) GET_SP() < 0x100 ); + check( (unsigned) a < 0x100 ); + check( (unsigned) x < 0x100 ); + check( (unsigned) y < 0x100 ); + + unsigned opcode = *pc; + int cycles = this->cycle_table [opcode]; + unsigned data = *++pc; + if ( (spc_time_ += cycles) > 0 ) + goto out_of_time; + switch ( opcode ) + { + +// Common instructions + +#define BRANCH( cond )\ +{\ + pc++;\ + int offset = (int8_t) data;\ + if ( cond ) {\ + pc += offset;\ + spc_time_ += 2;\ + }\ + goto loop;\ +} + + case 0xF0: // BEQ (most common) + BRANCH( !(uint8_t) nz ) + + case 0xD0: // BNE + BRANCH( (uint8_t) nz ) + + case 0x3F: // CALL + PUSH16( GET_PC() + 2 ); + SET_PC( READ_PC16( pc ) ); + goto loop; + + case 0x6F: // RET + SET_PC( POP() ); + pc += POP() * 0x100; + goto loop; + +#define CASE( n ) case n: + +// Define common address modes based on opcode for immediate mode. Execution +// ends with data set to the address of the operand. +#define ADDR_MODES( op )\ + CASE( op - 0x02 ) /* (X) */\ + data = x + dp;\ + pc--;\ + goto end_##op;\ + CASE( op + 0x0F ) /* (dp)+Y */\ + data = READ_PROG16( data + dp ) + y;\ + goto end_##op;\ + CASE( op - 0x01 ) /* (dp+X) */\ + data = READ_PROG16( ((uint8_t) (data + x)) + dp );\ + goto end_##op;\ + CASE( op + 0x0E ) /* abs+Y */\ + data += y;\ + goto abs_##op;\ + CASE( op + 0x0D ) /* abs+X */\ + data += x;\ + CASE( op - 0x03 ) /* abs */\ + abs_##op:\ + data += 0x100 * READ_PC( ++pc );\ + goto end_##op;\ + CASE( op + 0x0C ) /* dp+X */\ + data = (uint8_t) (data + x);\ + CASE( op - 0x04 ) /* dp */\ + data += dp;\ + end_##op: + +// 1. 8-bit Data Transmission Commands. Group I + + ADDR_MODES( 0xE8 ) // MOV A,addr + // case 0xE4: // MOV a,dp (most common) + mov_a_addr: + a = nz = READ( data ); + goto inc_pc_loop; + case 0xBF: // MOV A,(X)+ + data = x + dp; + x = (uint8_t) (x + 1); + pc--; + goto mov_a_addr; + + case 0xE8: // MOV A,imm + a = data; + nz = data; + goto inc_pc_loop; + + case 0xF9: // MOV X,dp+Y + data = (uint8_t) (data + y); + case 0xF8: // MOV X,dp + data += dp; + goto mov_x_addr; + case 0xE9: // MOV X,abs + data = READ_PC16( pc ); + pc++; + mov_x_addr: + data = READ( data ); + case 0xCD: // MOV X,imm + x = data; + nz = data; + goto inc_pc_loop; + + case 0xFB: // MOV Y,dp+X + data = (uint8_t) (data + x); + case 0xEB: // MOV Y,dp + data += dp; + goto mov_y_addr; + case 0xEC: // MOV Y,abs + data = READ_PC16( pc ); + pc++; + mov_y_addr: + data = READ( data ); + case 0x8D: // MOV Y,imm + y = data; + nz = data; + goto inc_pc_loop; + +// 2. 8-BIT DATA TRANSMISSION COMMANDS, GROUP 2 + + ADDR_MODES( 0xC8 ) // MOV addr,A + WRITE( data, a ); + goto inc_pc_loop; + + { + int temp; + case 0xCC: // MOV abs,Y + temp = y; + goto mov_abs_temp; + case 0xC9: // MOV abs,X + temp = x; + mov_abs_temp: + WRITE( READ_PC16( pc ), temp ); + pc += 2; + goto loop; + } + + case 0xD9: // MOV dp+Y,X + data = (uint8_t) (data + y); + case 0xD8: // MOV dp,X + WRITE( data + dp, x ); + goto inc_pc_loop; + + case 0xDB: // MOV dp+X,Y + data = (uint8_t) (data + x); + case 0xCB: // MOV dp,Y + WRITE( data + dp, y ); + goto inc_pc_loop; + + case 0xFA: // MOV dp,dp + data = READ( data + dp ); + case 0x8F: // MOV dp,#imm + WRITE_DP( READ_PC( ++pc ), data ); + goto inc_pc_loop; + +// 3. 8-BIT DATA TRANSMISSIN COMMANDS, GROUP 3. + + case 0x7D: // MOV A,X + a = x; + nz = x; + goto loop; + + case 0xDD: // MOV A,Y + a = y; + nz = y; + goto loop; + + case 0x5D: // MOV X,A + x = a; + nz = a; + goto loop; + + case 0xFD: // MOV Y,A + y = a; + nz = a; + goto loop; + + case 0x9D: // MOV X,SP + x = nz = GET_SP(); + goto loop; + + case 0xBD: // MOV SP,X + SET_SP( x ); + goto loop; + + //case 0xC6: // MOV (X),A (handled by MOV addr,A in group 2) + + case 0xAF: // MOV (X)+,A + WRITE_DP( x, a ); + x++; + goto loop; + +// 5. 8-BIT LOGIC OPERATION COMMANDS + +#define LOGICAL_OP( op, func )\ + ADDR_MODES( op ) /* addr */\ + data = READ( data );\ + case op: /* imm */\ + nz = a func##= data;\ + goto inc_pc_loop;\ + { unsigned addr;\ + case op + 0x11: /* X,Y */\ + data = READ_DP( y );\ + addr = x + dp;\ + pc--;\ + goto addr_##op;\ + case op + 0x01: /* dp,dp */\ + data = READ_DP( data );\ + case op + 0x10: /*dp,imm*/\ + addr = READ_PC( ++pc ) + dp;\ + addr_##op:\ + nz = data func READ( addr );\ + WRITE( addr, nz );\ + goto inc_pc_loop;\ + } + + LOGICAL_OP( 0x28, & ); // AND + + LOGICAL_OP( 0x08, | ); // OR + + LOGICAL_OP( 0x48, ^ ); // EOR + +// 4. 8-BIT ARITHMETIC OPERATION COMMANDS + + ADDR_MODES( 0x68 ) // CMP addr + data = READ( data ); + case 0x68: // CMP imm + nz = a - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + case 0x79: // CMP (X),(Y) + data = READ_DP( x ); + nz = data - READ_DP( y ); + c = ~nz; + nz &= 0xFF; + goto loop; + + case 0x69: // CMP (dp),(dp) + data = READ_DP( data ); + case 0x78: // CMP dp,imm + nz = READ_DP( READ_PC( ++pc ) ) - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + case 0x3E: // CMP X,dp + data += dp; + goto cmp_x_addr; + case 0x1E: // CMP X,abs + data = READ_PC16( pc ); + pc++; + cmp_x_addr: + data = READ( data ); + case 0xC8: // CMP X,imm + nz = x - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + case 0x7E: // CMP Y,dp + data += dp; + goto cmp_y_addr; + case 0x5E: // CMP Y,abs + data = READ_PC16( pc ); + pc++; + cmp_y_addr: + data = READ( data ); + case 0xAD: // CMP Y,imm + nz = y - data; + c = ~nz; + nz &= 0xFF; + goto inc_pc_loop; + + { + int addr; + case 0xB9: // SBC (x),(y) + case 0x99: // ADC (x),(y) + pc--; // compensate for inc later + data = READ_DP( x ); + addr = y + dp; + goto adc_addr; + case 0xA9: // SBC dp,dp + case 0x89: // ADC dp,dp + data = READ_DP( data ); + case 0xB8: // SBC dp,imm + case 0x98: // ADC dp,imm + addr = READ_PC( ++pc ) + dp; + adc_addr: + nz = READ( addr ); + goto adc_data; + +// catch ADC and SBC together, then decode later based on operand +#undef CASE +#define CASE( n ) case n: case (n) + 0x20: + ADDR_MODES( 0x88 ) // ADC/SBC addr + data = READ( data ); + case 0xA8: // SBC imm + case 0x88: // ADC imm + addr = -1; // A + nz = a; + adc_data: { + if ( opcode & 0x20 ) + data ^= 0xFF; // SBC + int carry = (c >> 8) & 1; + int ov = (nz ^ 0x80) + carry + (int8_t) data; // sign-extend + int hc = (nz & 15) + carry; + c = nz += data + carry; + hc = (nz & 15) - hc; + status = (status & ~(st_v | st_h)) | ((ov >> 2) & st_v) | ((hc >> 1) & st_h); + if ( addr < 0 ) { + a = (uint8_t) nz; + goto inc_pc_loop; + } + WRITE( addr, (uint8_t) nz ); + goto inc_pc_loop; + } + + } + +// 6. ADDITION & SUBTRACTION COMMANDS + +#define INC_DEC_REG( reg, n )\ + nz = reg + n;\ + reg = (uint8_t) nz;\ + goto loop; + + case 0xBC: INC_DEC_REG( a, 1 ) // INC A + case 0x3D: INC_DEC_REG( x, 1 ) // INC X + case 0xFC: INC_DEC_REG( y, 1 ) // INC Y + + case 0x9C: INC_DEC_REG( a, -1 ) // DEC A + case 0x1D: INC_DEC_REG( x, -1 ) // DEC X + case 0xDC: INC_DEC_REG( y, -1 ) // DEC Y + + case 0x9B: // DEC dp+X + case 0xBB: // INC dp+X + data = (uint8_t) (data + x); + case 0x8B: // DEC dp + case 0xAB: // INC dp + data += dp; + goto inc_abs; + case 0x8C: // DEC abs + case 0xAC: // INC abs + data = READ_PC16( pc ); + pc++; + inc_abs: + nz = ((opcode >> 4) & 2) - 1; + nz += READ( data ); + WRITE( data, (uint8_t) nz ); + goto inc_pc_loop; + +// 7. SHIFT, ROTATION COMMANDS + + case 0x5C: // LSR A + c = 0; + case 0x7C:{// ROR A + nz = ((c >> 1) & 0x80) | (a >> 1); + c = a << 8; + a = nz; + goto loop; + } + + case 0x1C: // ASL A + c = 0; + case 0x3C:{// ROL A + int temp = (c >> 8) & 1; + c = a << 1; + nz = c | temp; + a = (uint8_t) nz; + goto loop; + } + + case 0x0B: // ASL dp + c = 0; + data += dp; + goto rol_mem; + case 0x1B: // ASL dp+X + c = 0; + case 0x3B: // ROL dp+X + data = (uint8_t) (data + x); + case 0x2B: // ROL dp + data += dp; + goto rol_mem; + case 0x0C: // ASL abs + c = 0; + case 0x2C: // ROL abs + data = READ_PC16( pc ); + pc++; + rol_mem: + nz = (c >> 8) & 1; + nz |= (c = READ( data ) << 1); + WRITE( data, (uint8_t) nz ); + goto inc_pc_loop; + + case 0x4B: // LSR dp + c = 0; + data += dp; + goto ror_mem; + case 0x5B: // LSR dp+X + c = 0; + case 0x7B: // ROR dp+X + data = (uint8_t) (data + x); + case 0x6B: // ROR dp + data += dp; + goto ror_mem; + case 0x4C: // LSR abs + c = 0; + case 0x6C: // ROR abs + data = READ_PC16( pc ); + pc++; + ror_mem: { + int temp = READ( data ); + nz = ((c >> 1) & 0x80) | (temp >> 1); + c = temp << 8; + WRITE( data, nz ); + goto inc_pc_loop; + } + + case 0x9F: // XCN + nz = a = (a >> 4) | (uint8_t) (a << 4); + goto loop; + +// 8. 16-BIT TRANSMISION COMMANDS + + case 0xBA: // MOVW YA,dp + a = READ_DP( data ); + nz = (a & 0x7F) | (a >> 1); + y = READ_DP( (uint8_t) (data + 1) ); + nz |= y; + goto inc_pc_loop; + + case 0xDA: // MOVW dp,YA + WRITE_DP( data, a ); + WRITE_DP( (uint8_t) (data + 1), y ); + goto inc_pc_loop; + +// 9. 16-BIT OPERATION COMMANDS + + case 0x3A: // INCW dp + case 0x1A:{// DECW dp + data += dp; + + // low byte + int temp = READ( data ); + temp += ((opcode >> 4) & 2) - 1; // +1 for INCW, -1 for DECW + nz = ((temp >> 1) | temp) & 0x7F; + WRITE( data, (uint8_t) temp ); + + // high byte + data = ((uint8_t) (data + 1)) + dp; + temp >>= 8; + temp = (uint8_t) (temp + READ( data )); + nz |= temp; + WRITE( data, temp ); + + goto inc_pc_loop; + } + + case 0x9A: // SUBW YA,dp + case 0x7A: // ADDW YA,dp + { + // read 16-bit addend + int temp = READ_DP( data ); + int sign = READ_DP( (uint8_t) (data + 1) ); + temp += 0x100 * sign; + status &= ~(st_v | st_h); + + // to do: fix half-carry for SUBW (it's probably wrong) + + // for SUBW, negate and truncate to 16 bits + if ( opcode & 0x80 ) { + temp = (temp ^ 0xFFFF) + 1; + sign = temp >> 8; + } + + // add low byte (A) + temp += a; + a = (uint8_t) temp; + nz = (temp | (temp >> 1)) & 0x7F; + + // add high byte (Y) + temp >>= 8; + c = y + temp; + nz = (nz | c) & 0xFF; + + // half-carry (temporary avoids CodeWarrior optimizer bug) + unsigned hc = (c & 15) - (y & 15); + status |= (hc >> 4) & st_h; + + // overflow if sign of YA changed when previous sign and addend sign were same + status |= (((c ^ y) & ~(y ^ sign)) >> 1) & st_v; + + y = (uint8_t) c; + + goto inc_pc_loop; + } + + case 0x5A: { // CMPW YA,dp + int temp = a - READ_DP( data ); + nz = ((temp >> 1) | temp) & 0x7F; + temp = y + (temp >> 8); + temp -= READ_DP( (uint8_t) (data + 1) ); + nz |= temp; + c = ~temp; + nz &= 0xFF; + goto inc_pc_loop; + } + +// 10. MULTIPLICATION & DIVISON COMMANDS + + case 0xCF: { // MUL YA + unsigned temp = y * a; + a = (uint8_t) temp; + nz = ((temp >> 1) | temp) & 0x7F; + y = temp >> 8; + nz |= y; + goto loop; + } + + case 0x9E: // DIV YA,X + { + // behavior based on SPC CPU tests + + status &= ~(st_h | st_v); + + if ( (y & 15) >= (x & 15) ) + status |= st_h; + + if ( y >= x ) + status |= st_v; + + unsigned ya = y * 0x100 + a; + if ( y < x * 2 ) + { + a = ya / x; + y = ya - a * x; + } + else + { + a = 255 - (ya - x * 0x200) / (256 - x); + y = x + (ya - x * 0x200) % (256 - x); + } + + nz = (uint8_t) a; + a = (uint8_t) a; + + goto loop; + } + +// 11. DECIMAL COMPENSATION COMMANDS + + // seem unused + // case 0xDF: // DAA + // case 0xBE: // DAS + +// 12. BRANCHING COMMANDS + + case 0x2F: // BRA rel + pc += (int8_t) data; + goto inc_pc_loop; + + case 0x30: // BMI + BRANCH( IS_NEG ) + + case 0x10: // BPL + BRANCH( !IS_NEG ) + + case 0xB0: // BCS + BRANCH( c & 0x100 ) + + case 0x90: // BCC + BRANCH( !(c & 0x100) ) + + case 0x70: // BVS + BRANCH( status & st_v ) + + case 0x50: // BVC + BRANCH( !(status & st_v) ) + + case 0x03: // BBS dp.bit,rel + case 0x23: + case 0x43: + case 0x63: + case 0x83: + case 0xA3: + case 0xC3: + case 0xE3: + pc++; + if ( (READ_DP( data ) >> (opcode >> 5)) & 1 ) + goto cbranch_taken_loop; + goto inc_pc_loop; + + case 0x13: // BBC dp.bit,rel + case 0x33: + case 0x53: + case 0x73: + case 0x93: + case 0xB3: + case 0xD3: + case 0xF3: + pc++; + if ( !((READ_DP( data ) >> (opcode >> 5)) & 1) ) + goto cbranch_taken_loop; + goto inc_pc_loop; + + case 0xDE: // CBNE dp+X,rel + data = (uint8_t) (data + x); + // fall through + case 0x2E: // CBNE dp,rel + pc++; + if ( READ_DP( data ) != a ) + goto cbranch_taken_loop; + goto inc_pc_loop; + + case 0xFE: // DBNZ Y,rel + y = (uint8_t) (y - 1); + BRANCH( y ) + + case 0x6E: { // DBNZ dp,rel + pc++; + unsigned temp = READ_DP( data ) - 1; + WRITE_DP( (uint8_t) data, (uint8_t) temp ); + if ( temp ) + goto cbranch_taken_loop; + goto inc_pc_loop; + } + + case 0x1F: // JMP (abs+X) + SET_PC( READ_PC16( pc ) + x ); + // fall through + case 0x5F: // JMP abs + SET_PC( READ_PC16( pc ) ); + goto loop; + +// 13. SUB-ROUTINE CALL RETURN COMMANDS + + case 0x0F:{// BRK + check( 0 ); // untested + PUSH16( GET_PC() + 1 ); + SET_PC( READ_PROG16( 0xFFDE ) ); // vector address verified + int temp; + CALC_STATUS( temp ); + PUSH( temp ); + status = (status | st_b) & ~st_i; + goto loop; + } + + case 0x4F: // PCALL offset + PUSH16( GET_PC() + 1 ); + SET_PC( 0xFF00 + data ); + goto loop; + + case 0x01: // TCALL n + case 0x11: + case 0x21: + case 0x31: + case 0x41: + case 0x51: + case 0x61: + case 0x71: + case 0x81: + case 0x91: + case 0xA1: + case 0xB1: + case 0xC1: + case 0xD1: + case 0xE1: + case 0xF1: + PUSH16( GET_PC() ); + SET_PC( READ_PROG16( 0xFFDE - (opcode >> 3) ) ); + goto loop; + +// 14. STACK OPERATION COMMANDS + + { + int temp; + case 0x7F: // RET1 + temp = POP(); + SET_PC( POP() ); + pc += POP() << 8; + goto set_status; + case 0x8E: // POP PSW + temp = POP(); + set_status: + SET_STATUS( temp ); + goto loop; + } + + case 0x0D: { // PUSH PSW + int temp; + CALC_STATUS( temp ); + PUSH( temp ); + goto loop; + } + + case 0x2D: // PUSH A + PUSH( a ); + goto loop; + + case 0x4D: // PUSH X + PUSH( x ); + goto loop; + + case 0x6D: // PUSH Y + PUSH( y ); + goto loop; + + case 0xAE: // POP A + a = POP(); + goto loop; + + case 0xCE: // POP X + x = POP(); + goto loop; + + case 0xEE: // POP Y + y = POP(); + goto loop; + +// 15. BIT OPERATION COMMANDS + + case 0x02: // SET1 + case 0x22: + case 0x42: + case 0x62: + case 0x82: + case 0xA2: + case 0xC2: + case 0xE2: + case 0x12: // CLR1 + case 0x32: + case 0x52: + case 0x72: + case 0x92: + case 0xB2: + case 0xD2: + case 0xF2: { + data += dp; + int bit = 1 << (opcode >> 5); + int mask = ~bit; + if ( opcode & 0x10 ) + bit = 0; + WRITE( data, (READ( data ) & mask) | bit ); + goto inc_pc_loop; + } + + case 0x0E: // TSET1 abs + case 0x4E:{// TCLR1 abs + data = READ_PC16( pc ); + pc += 2; + unsigned temp = READ( data ); + nz = temp & a; + temp &= ~a; + if ( !(opcode & 0x40) ) + temp |= a; + WRITE( data, temp ); + goto loop; + } + + case 0x4A: // AND1 C,mem.bit + c &= MEM_BIT(); + pc += 2; + goto loop; + + case 0x6A: // AND1 C,/mem.bit + check( 0 ); // untested + c &= ~MEM_BIT(); + pc += 2; + goto loop; + + case 0x0A: // OR1 C,mem.bit + check( 0 ); // untested + c |= MEM_BIT(); + pc += 2; + goto loop; + + case 0x2A: // OR1 C,/mem.bit + check( 0 ); // untested + c |= ~MEM_BIT(); + pc += 2; + goto loop; + + case 0x8A: // EOR1 C,mem.bit + c ^= MEM_BIT(); + pc += 2; + goto loop; + + case 0xEA: { // NOT1 mem.bit + data = READ_PC16( pc ); + pc += 2; + unsigned temp = READ( data & 0x1FFF ); + temp ^= 1 << (data >> 13); + WRITE( data & 0x1FFF, temp ); + goto loop; + } + + case 0xCA: { // MOV1 mem.bit,C + data = READ_PC16( pc ); + pc += 2; + unsigned temp = READ( data & 0x1FFF ); + unsigned bit = data >> 13; + temp = (temp & ~(1 << bit)) | (((c >> 8) & 1) << bit); + WRITE( data & 0x1FFF, temp ); + goto loop; + } + + case 0xAA: // MOV1 C,mem.bit + c = MEM_BIT(); + pc += 2; + goto loop; + +// 16. PROGRAM STATUS FLAG OPERATION COMMANDS + + case 0x60: // CLRC + c = 0; + goto loop; + + case 0x80: // SETC + c = ~0; + goto loop; + + case 0xED: // NOTC + c ^= 0x100; + goto loop; + + case 0xE0: // CLRV + status &= ~(st_v | st_h); + goto loop; + + case 0x20: // CLRP + dp = 0; + goto loop; + + case 0x40: // SETP + dp = 0x100; + goto loop; + + case 0xA0: // EI + check( 0 ); // untested + status |= st_i; + goto loop; + + case 0xC0: // DI + check( 0 ); // untested + status &= ~st_i; + goto loop; + +// 17. OTHER COMMANDS + + case 0x00: // NOP + goto loop; + + //case 0xEF: // SLEEP + //case 0xFF: // STOP + case 0xFF: + c |= 1; // force switch table to have 256 entries, hopefully helping optimizer + } // switch + + // unhandled instructions fall out of switch so emulator can catch them + +out_of_time: + spc_time_ -= this->cycle_table [*--pc]; // undo partial execution of opcode + { + int temp; + CALC_STATUS( temp ); + this->r.status = (uint8_t) temp; + } + + this->r.pc = GET_PC(); + this->r.sp = (uint8_t) GET_SP(); + this->r.a = (uint8_t) a; + this->r.x = (uint8_t) x; + this->r.y = (uint8_t) y; + + //EXIT_TIMER(cpu); + + return spc_time_; +} Index: apps/codecs/spc/spc_profiler.h =================================================================== --- apps/codecs/spc/spc_profiler.h (revision 0) +++ apps/codecs/spc/spc_profiler.h (revision 0) @@ -0,0 +1,63 @@ +#if defined(SPC_PROFILE) && defined(USEC_TIMER) + +#define CREATE_TIMER(name) static uint32_t spc_timer_##name##_start,\ + spc_timer_##name##_total +#define ENTER_TIMER(name) spc_timer_##name##_start=USEC_TIMER +#define EXIT_TIMER(name) spc_timer_##name##_total+=\ + (USEC_TIMER-spc_timer_##name##_start) +#define READ_TIMER(name) (spc_timer_##name##_total) +#define RESET_TIMER(name) spc_timer_##name##_total=0 + +#define PRINT_TIMER_PCT(bname,tname,nstr) ci->fdprintf( \ + logfd,"%10ld ",READ_TIMER(bname));\ + ci->fdprintf(logfd,"(%3d%%) " nstr "\t",\ + ((uint64_t)READ_TIMER(bname))*100/READ_TIMER(tname)) + +CREATE_TIMER(total); +CREATE_TIMER(render); +//CREATE_TIMER(cpu); +//CREATE_TIMER(dsp); +//CREATE_TIMER(dsp_pregen); +//CREATE_TIMER(dsp_gen); +//CREATE_TIMER(dsp_mix); + +static void reset_profile_timers(void) { + RESET_TIMER(total); + RESET_TIMER(render); + //RESET_TIMER(cpu); + //RESET_TIMER(dsp); + //RESET_TIMER(dsp_pregen); + //RESET_TIMER(dsp_gen); + //RESET_TIMER(dsp_mix); +} + +static int logfd=-1; + +static void print_timers(char * path) { + logfd = ci->open("/spclog.txt",O_WRONLY|O_CREAT|O_APPEND); + ci->fdprintf(logfd,"%s:\t",path); + ci->fdprintf(logfd,"%10ld total\t",READ_TIMER(total)); + PRINT_TIMER_PCT(render,total,"render"); + //PRINT_TIMER_PCT(cpu,total,"CPU"); + //PRINT_TIMER_PCT(dsp,total,"DSP"); + //ci->fdprintf(logfd,"("); + //PRINT_TIMER_PCT(dsp_pregen,dsp,"pregen"); + //PRINT_TIMER_PCT(dsp_gen,dsp,"gen"); + //PRINT_TIMER_PCT(dsp_mix,dsp,"mix"); + ci->fdprintf(logfd,"\n"); + + ci->close(logfd); + logfd=-1; +} + +#else + +#define CREATE_TIMER(name) +#define ENTER_TIMER(name) +#define EXIT_TIMER(name) +#define READ_TIMER(name) +#define RESET_TIMER(name) +#define print_timers(path) +#define reset_profile_timers() + +#endif Index: apps/codecs/spc.c =================================================================== --- apps/codecs/spc.c (revision 0) +++ apps/codecs/spc.c (revision 0) @@ -0,0 +1,845 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * + * Copyright (C) 2006-2007 Adam Gashlin (hcs) + * Copyright (C) 2004-2007 Shay Green (blargg) + * Copyright (C) 2002 Brad Martin + * + * All files in this archive are subject to the GNU General Public License. + * See the file COPYING in the source tree root for full license agreement. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +/* lovingly ripped off from Game_Music_Emu 0.5.2. http://www.slack.net/~ant/ */ +/* DSP Based on Brad Martin's OpenSPC DSP emulator */ +/* tag reading from sexyspc by John Brawn (John_Brawn@yahoo.com) and others */ + +#include "codeclib.h" +#include "inttypes.h" +#include "system.h" + +// rather than comment out asserts, just define NDEBUG +#define NDEBUG +#include +#undef check +#define check assert + +CODEC_HEADER + +#ifdef CPU_ARM + #undef ICODE_ATTR + #define ICODE_ATTR + + #undef IDATA_ATTR + #define IDATA_ATTR +#endif + +/* TGB is the only target fast enough for gaussian and realtime BRR decode */ +/* echo is almost fast enough but not quite */ +#ifndef TOSHIBA_GIGABEAT_F + // Cache BRR waves + #define SPC_BRRCACHE 1 + + // Disable gaussian interpolation + #define SPC_NOINTERP 1 + + // Disable echo processing + #define SPC_NOECHO 1 +#endif + +/* Samples per channel per iteration */ +#define WAV_CHUNK_SIZE 2048 + +/* simple profiling with USEC_TIMER */ +//#define SPC_PROFILE + +#include "spc/spc_profiler.h" + +#define THIS struct Spc_Emu* const this + +typedef int32_t sample_t; +typedef long spc_time_t; + +/**************** Little-endian handling ****************/ + +static inline unsigned get_le16( void const* p ) +{ + return ((unsigned char const*) p) [1] * 0x100u + + ((unsigned char const*) p) [0]; +} + +static inline int get_le16s( void const* p ) +{ + return ((signed char const*) p) [1] * 0x100 + + ((unsigned char const*) p) [0]; +} + +static inline void set_le16( void* p, unsigned n ) +{ + ((unsigned char*) p) [1] = (unsigned char) (n >> 8); + ((unsigned char*) p) [0] = (unsigned char) n; +} + +#define GET_LE16( addr ) get_le16( addr ) +#define SET_LE16( addr, data ) set_le16( addr, data ) + +#if ROCKBOX_LITTLE_ENDIAN + #define GET_LE16A( addr ) (*(uint16_t*) (addr)) + #define GET_LE16SA( addr ) (*( int16_t*) (addr)) + #define SET_LE16A( addr, data ) (void) (*(uint16_t*) (addr) = (data)) +#else + #define GET_LE16A( addr ) get_le16 ( addr ) + #define GET_LE16SA( addr ) get_le16s( addr ) + #define SET_LE16A( addr, data ) set_le16 ( addr, data ) +#endif + +static struct +{ + union { + uint8_t padding1 [0x100]; + uint16_t align; + } padding1 [1]; + uint8_t ram [0x10000]; + uint8_t padding2 [0x100]; +} ram; + +#include "spc/Spc_Dsp.h" + +#undef RAM +#define RAM ram.ram + +/**************** Timers ****************/ + +enum { timer_count = 3 }; + +typedef struct Timer +{ + spc_time_t next_tick; + int period; + int count; + int shift; + int enabled; + int counter; +} Timer; + +static void Timer_run_( Timer* t, spc_time_t time ) ICODE_ATTR; +static void Timer_run_( Timer* t, spc_time_t time ) +{ + assert( t->enabled ); // when disabled, next_tick should always be in the future + + int elapsed = ((time - t->next_tick) >> t->shift) + 1; + t->next_tick += elapsed << t->shift; + + elapsed += t->count; + if ( elapsed >= t->period ) // avoid unnecessary division + { + int n = elapsed / t->period; + elapsed -= n * t->period; + t->counter = (t->counter + n) & 15; + } + t->count = elapsed; +} + +static inline void Timer_run( Timer* t, spc_time_t time ) +{ + if ( time >= t->next_tick ) + Timer_run_( t, time ); +} + +/**************** SPC emulator ****************/ + +enum { clocks_per_sample = 32 }; // 1.024 MHz clock / 32000 samples per second + +enum { extra_clocks = clocks_per_sample / 2 }; + +// using this disables timer (since this will always be in the future) +enum { timer_disabled_time = 127 }; + +enum { rom_size = 64 }; +enum { rom_addr = 0xFFC0 }; + +struct cpu_regs_t +{ + long pc; // more than 16 bits to allow overflow detection + uint8_t a; + uint8_t x; + uint8_t y; + uint8_t status; + uint8_t sp; +}; + + +struct Spc_Emu +{ + uint8_t cycle_table [0x100]; + struct cpu_regs_t r; + + sample_t* sample_buf; + spc_time_t next_dsp; + int rom_enabled; + int extra_cycles; + + Timer timer [timer_count]; + + // large objects at end + Spc_Dsp dsp; + uint8_t extra_ram [rom_size]; + uint8_t boot_rom [rom_size]; +}; + +static void SPC_enable_rom( THIS, int enable ) +{ + if ( this->rom_enabled != enable ) + { + this->rom_enabled = enable; + memcpy( RAM + rom_addr, (enable ? this->boot_rom : this->extra_ram), rom_size ); + // TODO: ROM can still get overwritten when DSP writes to echo buffer + } +} + +static void SPC_Init( THIS ) +{ + this->timer [0].shift = 4 + 3; // 8 kHz + this->timer [1].shift = 4 + 3; // 8 kHz + this->timer [2].shift = 4; // 8 kHz + + // Put STOP instruction around memory to catch PC underflow/overflow. + memset( ram.padding1, 0xFF, sizeof ram.padding1 ); + memset( ram.padding2, 0xFF, sizeof ram.padding2 ); + + // A few tracks read from the last four bytes of IPL ROM + this->boot_rom [sizeof this->boot_rom - 2] = 0xC0; + this->boot_rom [sizeof this->boot_rom - 1] = 0xFF; + memset( this->boot_rom, 0, sizeof this->boot_rom - 2 ); +} + +static void SPC_load_state( THIS, struct cpu_regs_t const* cpu_state, + const void* new_ram, const void* dsp_state ) +{ + memcpy(&(this->r),cpu_state,sizeof this->r); + + // ram + memcpy( RAM, new_ram, sizeof RAM ); + memcpy( this->extra_ram, RAM + rom_addr, sizeof this->extra_ram ); + + // boot rom (have to force enable_rom() to update it) + this->rom_enabled = !(RAM [0xF1] & 0x80); + SPC_enable_rom( this, !this->rom_enabled ); + + // dsp + this->extra_cycles = 32; // some SPCs rely on DSP immediately generating one sample + DSP_reset( &this->dsp ); + int i; + for ( i = 0; i < register_count; i++ ) + DSP_write( &this->dsp, i, ((uint8_t const*) dsp_state) [i] ); + + // timers + for ( i = 0; i < timer_count; i++ ) + { + Timer* t = &this->timer [i]; + + t->next_tick = -extra_clocks; + t->enabled = (RAM [0xF1] >> i) & 1; + if ( !t->enabled ) + t->next_tick = timer_disabled_time; + t->count = 0; + t->counter = RAM [0xFD + i] & 15; + + int p = RAM [0xFA + i]; + if ( !p ) + p = 0x100; + t->period = p; + } + + // Handle registers which already give 0 when read by setting RAM and not changing it. + // Put STOP instruction in registers which can be read, to catch attempted execution. + RAM [0xF0] = 0; + RAM [0xF1] = 0; + RAM [0xF3] = 0xFF; + RAM [0xFA] = 0; + RAM [0xFB] = 0; + RAM [0xFC] = 0; + RAM [0xFD] = 0xFF; + RAM [0xFE] = 0xFF; + RAM [0xFF] = 0xFF; +} + +static void clear_echo( THIS ) +{ + if ( !(DSP_read( &this->dsp, 0x6C ) & 0x20) ) + { + unsigned addr = 0x100 * DSP_read( &this->dsp, 0x6D ); + size_t size = 0x800 * DSP_read( &this->dsp, 0x7D ); + size_t max_size = sizeof RAM - addr; + if ( size > max_size ) + size = sizeof RAM - addr; + memset( RAM + addr, 0xFF, size ); + } +} + +enum { spc_file_size = 0x10180 }; + +struct spc_file_t +{ + char signature [27]; + char unused [10]; + uint8_t pc [2]; + uint8_t a; + uint8_t x; + uint8_t y; + uint8_t status; + uint8_t sp; + char unused2 [212]; + uint8_t ram [0x10000]; + uint8_t dsp [128]; + uint8_t ipl_rom [128]; +}; + +static int SPC_load_spc( THIS, const void* data, long size ) +{ + struct spc_file_t const* spc = (struct spc_file_t const*) data; + struct cpu_regs_t regs; + + if ( size < spc_file_size ) + return -1; + + if ( memcmp( spc->signature, "SNES-SPC700 Sound File Data", 27 ) != 0 ) + return -1; + + regs.pc = spc->pc [1] * 0x100 + spc->pc [0]; + regs.a = spc->a; + regs.x = spc->x; + regs.y = spc->y; + regs.status = spc->status; + regs.sp = spc->sp; + + if ( (unsigned long) size >= sizeof *spc ) + memcpy( this->boot_rom, spc->ipl_rom, sizeof this->boot_rom ); + + SPC_load_state( this, ®s, spc->ram, spc->dsp ); + + clear_echo(this); + + return 0; +} + +/**************** DSP interaction ****************/ + +static void SPC_run_dsp_( THIS, spc_time_t time ) ICODE_ATTR; +static void SPC_run_dsp_( THIS, spc_time_t time ) +{ + int count = ((time - this->next_dsp) >> 5) + 1; // divide by clocks_per_sample + sample_t* buf = this->sample_buf; + this->sample_buf = buf + count; + this->next_dsp += count * clocks_per_sample; + DSP_run( &this->dsp, count, buf ); +} + +static inline void SPC_run_dsp( THIS, spc_time_t time ) +{ + if ( time >= this->next_dsp ) + SPC_run_dsp_( this, time ); +} + +static int SPC_read( THIS, unsigned addr, spc_time_t const time ) ICODE_ATTR; +static int SPC_read( THIS, unsigned addr, spc_time_t const time ) +{ + int result = RAM [addr]; + + if ( ((unsigned) (addr - 0xF0)) < 0x10 ) + { + assert( 0xF0 <= addr && addr <= 0xFF ); + + // counters + int i = addr - 0xFD; + if ( i >= 0 ) + { + Timer* t = &this->timer [i]; + Timer_run( t, time ); + result = t->counter; + t->counter = 0; + } + // dsp + else if ( addr == 0xF3 ) + { + SPC_run_dsp( this, time ); + result = DSP_read( &this->dsp, RAM [0xF2] & 0x7F ); + } + } + return result; +} + +static void SPC_write( THIS, unsigned addr, int data, spc_time_t const time ) ICODE_ATTR; +static void SPC_write( THIS, unsigned addr, int data, spc_time_t const time ) +{ + // first page is very common + if ( addr < 0xF0 ) + { + RAM [addr] = (uint8_t) data; + } + else switch ( addr ) + { + // RAM + default: + if ( addr < rom_addr ) + { + RAM [addr] = (uint8_t) data; + } + else + { + this->extra_ram [addr - rom_addr] = (uint8_t) data; + if ( !this->rom_enabled ) + RAM [addr] = (uint8_t) data; + } + break; + + // DSP + //case 0xF2: // mapped to RAM + case 0xF3: { + SPC_run_dsp( this, time ); + int reg = RAM [0xF2]; + if ( reg < register_count ) { + DSP_write( &this->dsp, reg, data ); + } + else { + //dprintf( "DSP write to $%02X\n", (int) reg ); + } + break; + } + + case 0xF0: // Test register + //dprintf( "Wrote $%02X to $F0\n", (int) data ); + break; + + // Config + case 0xF1: + { + int i; + // timers + for ( i = 0; i < timer_count; i++ ) + { + Timer * t = this->timer+i; + if ( !(data & (1 << i)) ) + { + t->enabled = 0; + t->next_tick = timer_disabled_time; + } + else if ( !t->enabled ) + { + // just enabled + t->enabled = 1; + t->counter = 0; + t->count = 0; + t->next_tick = time; + } + } + + // port clears + if ( data & 0x10 ) + { + RAM [0xF4] = 0; + RAM [0xF5] = 0; + } + if ( data & 0x20 ) + { + RAM [0xF6] = 0; + RAM [0xF7] = 0; + } + + SPC_enable_rom( this, (data & 0x80) != 0 ); + break; + } + + // Ports + case 0xF4: + case 0xF5: + case 0xF6: + case 0xF7: + // to do: handle output ports + break; + + //case 0xF8: // verified on SNES that these are read/write (RAM) + //case 0xF9: + + // Timers + case 0xFA: + case 0xFB: + case 0xFC: { + int i = addr - 0xFA; + Timer* t = &this->timer [i]; + if ( (t->period & 0xFF) != data ) + { + Timer_run( t, time ); + this->timer[i].period = data ? data : 0x100; + } + break; + } + + // Counters (cleared on write) + case 0xFD: + case 0xFE: + case 0xFF: + //dprintf( "Wrote to counter $%02X\n", (int) addr ); + this->timer [addr - 0xFD].counter = 0; + break; + } +} + +#include "spc/Spc_Cpu.h" + +/**************** Sample generation ****************/ + +static int SPC_play( THIS, long count, sample_t* out ) ICODE_ATTR; +static int SPC_play( THIS, long count, sample_t* out ) +{ + int i; + assert( count % 2 == 0 ); // output is always in pairs of samples + + spc_time_t start_time = -(count >> 1) * clocks_per_sample - extra_clocks; + + // DSP output is made on-the-fly when DSP registers are read or written + this->sample_buf = out; + this->next_dsp = start_time + clocks_per_sample; + + // Localize timer next_tick times and run them to the present to prevent a running + // but ignored timer's next_tick from getting too far behind and overflowing. + for ( i = 0; i < timer_count; i++ ) + { + Timer* t = &this->timer [i]; + if ( t->enabled ) + { + t->next_tick += start_time + extra_clocks; + Timer_run( t, start_time ); + } + } + + // Run from start_time to 0, pre-advancing by extra cycles from last run + this->extra_cycles = CPU_run( this, start_time + this->extra_cycles ) + extra_clocks; + if ( this->extra_cycles < 0 ) + { + //dprintf( "Unhandled instruction $%02X, pc = $%04X\n", + // (int) CPU_read( r.pc ), (unsigned) r.pc ); + + return -1; + } + + // Catch DSP up to present + //ENTER_TIMER(cpu); + SPC_run_dsp( this, -extra_clocks ); + //EXIT_TIMER(cpu); + assert( this->next_dsp == clocks_per_sample - extra_clocks ); + assert( this->sample_buf - out == count ); + + return 0; +} + +/**************** ID666 parsing ****************/ + +struct { + unsigned char isBinary; + char song[32]; + char game[32]; + char dumper[16]; + char comments[32]; + int day,month,year; + unsigned long length; + unsigned long fade; + char artist[32]; + unsigned char muted; + unsigned char emulator; +} ID666; + +static int LoadID666(unsigned char *buf) { + unsigned char *ib=buf; + int isbinary = 1; + int i; + + memcpy(ID666.song,ib,32); + ID666.song[31]=0; + ib+=32; + + memcpy(ID666.game,ib,32); + ID666.game[31]=0; + ib+=32; + + memcpy(ID666.dumper,ib,16); + ID666.dumper[15]=0; + ib+=16; + + memcpy(ID666.comments,ib,32); + ID666.comments[31]=0; + ib+=32; + + /* Ok, now comes the fun part. */ + + /* Date check */ + if(ib[2] == '/' && ib[5] == '/' ) + isbinary = 0; + + /* Reserved bytes check */ + if(ib[0xD2 - 0x2E - 112] >= '0' && ib[0xD2 - 0x2E - 112] <= '9' && ib[0xD3 - 0x2E - 112] == 0x00) + isbinary = 0; + + /* is length & fade only digits? */ + for (i=0;i<8 && ( (ib[0xA9 - 0x2E - 112+i]>='0'&&ib[0xA9 - 0x2E - 112+i]<='9') || ib[0xA9 - 0x2E - 112+i]=='\0'); i++) { } + if (i==8) isbinary=0; + + //printf("%02x\n",ib[0xD2 - 0x2E - 112]); + + //printf("%d\n", isbinary); + + ID666.isBinary = isbinary; + + if(isbinary) { + DEBUGF("binary tag detected\n"); + ID666.year=*ib; + ib++; + ID666.year|=*ib<<8; + ib++; + ID666.month=*ib; + ib++; + ID666.day=*ib; + ib++; + + ib+=7; + + ID666.length=*ib; + ib++; + + ID666.length|=*ib<<8; + ib++; + + ID666.length|=*ib<<16; + ID666.length*=1000; + ib++; + + ID666.fade=*ib; + ib++; + ID666.fade|=*ib<<8; + ib++; + ID666.fade|=*ib<<16; + ib++; + ID666.fade|=*ib<<24; + //ID666.fade; + ib++; + + memcpy(ID666.artist,ib,32); + ID666.artist[31]=0; + ib+=32; + + ID666.muted=*ib; + ib++; + + ID666.emulator=*ib; + ib++; + } else { + int year, month, day; + unsigned long tmp; + char buf[64]; + + DEBUGF("text tag detected\n"); + + year=month=day=0; + //ib[10] = 0; + //sscanf(ib, "%02d/%02d/%04d", &month, &day, &year); + //ID666.year = year; + //ID666.day = day; + //ID666.month = month; + ib+=11; + + memcpy(buf, ib, 3); + buf[3] = 0; + tmp = 0; + //sscanf(buf, "%d", &tmp); + for (i=0;i<3 && buf[i]>='0' && buf[i]<='9';i++) tmp=tmp*10+buf[i]-'0'; + ID666.length = tmp * 1000; + ib+=3; + + memcpy(buf, ib, 5); + buf[5] = 0; + tmp = 0; + //sscanf(buf, "%d", &tmp); + for (i=0;i<5 && buf[i]>='0' && buf[i]<='9';i++) tmp=tmp*10+buf[i]-'0'; + ID666.fade = tmp; + ib+=5; + + memcpy(ID666.artist,ib,32); + ID666.artist[31]=0; + ib+=32; + + //I have no idea if this is right or not. + ID666.muted=*ib; + ib++; + // + + memcpy(buf, ib, 1); + buf[1] = 0; + tmp = 0; + //sscanf(buf, "%d", &tmp); + //ID666.emulator=tmp; + ib++; + } + return 1; +} + +/**************** Codec ****************/ + +static int32_t samples[WAV_CHUNK_SIZE*2] IBSS_ATTR; + +static struct Spc_Emu spc_emu IDATA_ATTR; + +enum {sample_rate = 32000}; + +/* The main decoder loop */ +static int play_track( void ) +{ + int sampleswritten=0; + + unsigned long fadestartsample = ID666.length*(long long) sample_rate/1000; + unsigned long fadeendsample = (ID666.length+ID666.fade)*(long long) sample_rate/1000; + int fadedec = 0; + int fadevol = 0x7fffffffl; + + if (fadeendsample>fadestartsample) + fadedec=0x7fffffffl/(fadeendsample-fadestartsample)+1; + + ENTER_TIMER(total); + + while ( 1 ) + { + ci->yield(); + if (ci->stop_codec || ci->new_track) { + break; + } + + if (ci->seek_time) { + int curtime = sampleswritten*1000LL/sample_rate; + DEBUGF("seek to %d\ncurrently at %d\n",ci->seek_time,curtime); + if (ci->seek_time < curtime) { + DEBUGF("seek backwards = reset\n"); + ci->seek_complete(); + return 1; + } + ci->seek_complete(); + } + + ENTER_TIMER(render); + // fill samples buffer + if ( SPC_play(&spc_emu,WAV_CHUNK_SIZE*2,samples) ) + assert( false ); + EXIT_TIMER(render); + + sampleswritten+=WAV_CHUNK_SIZE; + + /* is track timed? */ + if (ci->global_settings->repeat_mode!=REPEAT_ONE && ci->id3->length) { + unsigned long curtime = sampleswritten*1000LL/sample_rate; + unsigned long lasttimesample = (sampleswritten-WAV_CHUNK_SIZE); + + /* fade? */ + if (curtime>ID666.length) + { + int i; + for (i=0;ifadestartsample) { + if (fadevol>0) { + samples[i] = (samples[i]*(fadevol>>24))>>7; + samples[i+WAV_CHUNK_SIZE] = (samples[i+WAV_CHUNK_SIZE]*(fadevol>>24))>>7; + } else samples[i]=samples[i+WAV_CHUNK_SIZE]=0; + fadevol-=fadedec; + } + } + } + /* end? */ + if (lasttimesample>=fadeendsample) + break; + } + + ci->pcmbuf_insert(samples, samples+WAV_CHUNK_SIZE, WAV_CHUNK_SIZE); + + if (ci->global_settings->repeat_mode!=REPEAT_ONE) + ci->set_elapsed(sampleswritten*1000LL/sample_rate); + else + ci->set_elapsed(0); + } + + EXIT_TIMER(total); + + return 0; +} + +/* this is the codec entry point */ +enum codec_status codec_main(void) +{ + /* Generic codec initialisation */ + /* we only render 16 bits */ + /*ci->configure(CODEC_SET_FILEBUF_CHUNKSIZE, (int *)(1024*256));*/ + + memcpy( spc_emu.cycle_table, cycle_table, sizeof cycle_table ); + + do + { + DEBUGF("SPC: next_track\n"); + if (codec_init()) { + return CODEC_ERROR; + } + DEBUGF("SPC: after init\n"); + + ci->configure(DSP_SET_SAMPLE_DEPTH, 24); + ci->configure(DSP_SET_FREQUENCY, sample_rate); + ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED); + + /* wait for track info to load */ + while (!*ci->taginfo_ready && !ci->stop_codec) + ci->sleep(1); + + /* Read the entire file */ + DEBUGF("SPC: request initial buffer\n"); + ci->configure(CODEC_SET_FILEBUF_WATERMARK, ci->filesize); + + ci->seek_buffer(0); + size_t buffersize; + uint8_t* buffer = ci->request_buffer(&buffersize, ci->filesize); + if (!buffer) { + return CODEC_ERROR; + } + + DEBUGF("SPC: read size = 0x%x\n",buffersize); + do + { + SPC_Init(&spc_emu); + if (SPC_load_spc(&spc_emu,buffer,buffersize)) { + DEBUGF("SPC load failure\n"); + return CODEC_ERROR; + } + + LoadID666(buffer+0x2e); + + if (ci->global_settings->repeat_mode!=REPEAT_ONE && ID666.length==0) { + ID666.length=3*60*1000; /* 3 minutes */ + ID666.fade=5*1000; /* 5 seconds */ + } + ci->id3->length = ID666.length+ID666.fade; + ci->id3->title = ID666.song; + ci->id3->album = ID666.game; + ci->id3->artist = ID666.artist; + + reset_profile_timers(); + } + + while ( play_track() ); + + print_timers(ci->id3->path); + } + while ( ci->request_next_track() ); + + return CODEC_OK; +} Index: apps/codecs/Makefile =================================================================== --- apps/codecs/Makefile (revision 12293) +++ apps/codecs/Makefile (working copy) @@ -52,6 +52,7 @@ $(OBJDIR)/sid.elf : $(OBJDIR)/sid.o $(OBJDIR)/adx.elf : $(OBJDIR)/adx.o $(OBJDIR)/nsf.elf : $(OBJDIR)/nsf.o +$(OBJDIR)/spc.elf : $(OBJDIR)/spc.o $(OBJDIR)/aiff.elf : $(OBJDIR)/aiff.o $(OBJDIR)/mpa.elf : $(OBJDIR)/mpa.o $(BUILDDIR)/libmad.a $(OBJDIR)/a52.elf : $(OBJDIR)/a52.o $(BUILDDIR)/liba52.a Index: apps/codecs/SOURCES =================================================================== --- apps/codecs/SOURCES (revision 12293) +++ apps/codecs/SOURCES (working copy) @@ -17,6 +17,7 @@ sid.c adx.c nsf.c +spc.c #if defined(HAVE_RECORDING) && !defined(SIMULATOR) /* encoders */ aiff_enc.c Index: firmware/export/id3.h =================================================================== --- firmware/export/id3.h (revision 12293) +++ firmware/export/id3.h (working copy) @@ -52,6 +52,7 @@ AFMT_ADX, /* ADX File Format */ AFMT_NSF, /* NESM (NES Sound Format) */ AFMT_SPEEX, /* Ogg Speex speech */ + AFMT_SPC, /* SPC700 save state */ #endif /* add new formats at any index above this line to have a sensible order - Index: firmware/id3.c =================================================================== --- firmware/id3.c (revision 12293) +++ firmware/id3.c (working copy) @@ -104,6 +104,9 @@ /* Speex File Format */ [AFMT_SPEEX] = AFMT_ENTRY("Speex","speex", NULL, "spx\0" ), + /* SPC700 Save State */ + [AFMT_SPC] = + AFMT_ENTRY("SPC", "spc", NULL, "spc\0" ), #endif };