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gaelco soundcore
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dinkc64
parent
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@ -57,7 +57,7 @@ drvobj = d_dodonpachi.o d_donpachi.o d_esprade.o d_feversos.o d_gaia.o d_guwang
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d_xain.o d_xxmissio.o \
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\
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d_1945kiii.o d_aerofgt.o d_airbustr.o d_aquarium.o d_blmbycar.o d_bloodbro.o d_crospang.o d_crshrace.o d_dcon.o d_ddragon3.o \
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d_deniam.o d_diverboy.o d_dooyong.o d_drgnmst.o d_drtomy.o d_egghunt.o d_esd16.o d_f1gp.o d_funybubl.o d_fuukifg3.o d_gaelco.o \
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d_deniam.o d_diverboy.o d_dooyong.o d_drgnmst.o d_drtomy.o d_egghunt.o d_esd16.o d_f1gp.o d_funybubl.o d_fuukifg3.o d_gaelco.o d_gaelco2.o \
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d_gaiden.o d_galpanic.o d_galspnbl.o d_gotcha.o d_gumbo.o d_hyperpac.o d_jchan.o d_kaneko16.o d_lordgun.o d_mcatadv.o d_midas.o \
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d_mugsmash.o d_mwarr.o d_news.o d_nmg5.o d_nmk16.o d_ohmygod.o d_pass.o d_pirates.o d_playmark.o d_powerins.o d_pushman.o \
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d_raiden.o d_raiden2.o d_sandscrp.o d_seta.o d_seta2.o d_shadfrce.o d_silkroad.o d_silvmil.o d_speedspn.o d_suna16.o \
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@ -91,7 +91,7 @@ depobj := $(drvobj) \
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v3021.o vdc.o tms9928a.o \
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\
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ay8910.o burn_y8950.o burn_ym2151.o burn_ym2203.o burn_ym2413.o burn_ym2608.o burn_ym2610.o burn_ym2612.o \
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burn_ym3526.o burn_ym3812.o burn_ymf278b.o c6280.o dac.o es5506.o es8712.o flt_rc.o fm.o fmopl.o ics2115.o iremga20.o \
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burn_ym3526.o burn_ym3812.o burn_ymf278b.o c6280.o dac.o es5506.o es8712.o flt_rc.o fm.o fmopl.o gaelco.o ics2115.o iremga20.o \
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k005289.o k007232.o k051649.o k053260.o k054539.o msm5205.o msm5232.o msm6295.o namco_snd.o nes_apu.o pokey.o rf5c68.o saa1099.o \
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samples.o segapcm.o sn76496.o upd7759.o vlm5030.o x1010.o ym2151.o ym2413.o ymdeltat.o ymf278b.o ymz280b.o \
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\
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242
src/burn/snd/gaelco.cpp
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242
src/burn/snd/gaelco.cpp
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@ -0,0 +1,242 @@
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/***************************************************************************
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Gaelco Sound Hardware
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By Manuel Abadia <manu@teleline.es>
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CG-1V/GAE1 (Gaelco custom GFX & Sound chip):
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The CG-1V/GAE1 can handle up to 7 stereo channels.
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The chip output is connected to a TDA1543 (16 bit DAC).
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Registers per channel:
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======================
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Word | Bit(s) | Description
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-----+-FEDCBA98-76543210-+--------------------------
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0 | xxxxxxxx xxxxxxxx | not used?
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1 | xxxx---- -------- | left channel volume (0x00..0x0f)
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1 | ----xxxx -------- | right channel volume (0x00..0x0f)
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1 | -------- xxxx---- | sample type (0x0c = PCM 8 bits mono, 0x08 = PCM 8 bits stereo)
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1 | -------- ----xxxx | ROM Bank
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2 | xxxxxxxx xxxxxxxx | sample end position
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3 | xxxxxxxx xxxxxxxx | remaining bytes to play
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the following are used only when looping (usually used for music)
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4 | xxxxxxxx xxxxxxxx | not used?
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5 | xxxx---- -------- | left channel volume (0x00..0x0f)
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5 | ----xxxx -------- | right channel volume (0x00..0x0f)
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5 | -------- xxxx---- | sample type (0x0c = PCM 8 bits mono, 0x08 = PCM 8 bits stereo)
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5 | -------- ----xxxx | ROM Bank
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6 | xxxxxxxx xxxxxxxx | sample end position
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7 | xxxxxxxx xxxxxxxx | remaining bytes to play
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The samples are played from (end position + length) to (end position)!
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***************************************************************************/
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#include "burnint.h"
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#include "burn_sound.h"
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#include "gaelco.h"
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#define GAELCO_NUM_CHANNELS 0x07
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#define GAELCO_VOLUME_LEVELS 0x10
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struct gaelco_sound_channel
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{
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INT32 active; // is it playing?
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INT32 loop; // = 0 no looping, = 1 looping
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INT32 chunkNum; // current chunk if looping
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};
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//sound_stream *m_stream; /* our stream */
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static UINT8 *m_snd_data; /* PCM data */
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static INT32 m_banks[4]; /* start of each ROM bank */
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static gaelco_sound_channel m_channel[GAELCO_NUM_CHANNELS]; /* 7 stereo channels */
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static UINT16 m_sndregs[0x38];
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// Table for converting from 8 to 16 bits with volume control
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static INT16 m_volume_table[GAELCO_VOLUME_LEVELS][256];
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static void gaelco_set_bank_offsets(INT32 offs1, INT32 offs2, INT32 offs3, INT32 offs4)
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{
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m_banks[0] = offs1;
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m_banks[1] = offs2;
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m_banks[2] = offs3;
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m_banks[3] = offs4;
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}
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/*============================================================================
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CG-1V/GAE1 Sound Update
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Writes length bytes to the sound buffer
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============================================================================*/
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void gaelcosnd_update(INT16 *outputs, INT32 samples)
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{
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INT32 j, ch;
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memset(outputs, 0, samples * sizeof(UINT16) * 2);
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/* fill all data needed */
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//for(j = 0; j < samples; j++){
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while (samples > 0) {
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INT32 output_l = 0, output_r = 0;
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/* for each channel */
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for (ch = 0; ch < GAELCO_NUM_CHANNELS; ch ++){
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INT32 ch_data_l = 0, ch_data_r = 0;
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gaelco_sound_channel *channel = &m_channel[ch];
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/* if the channel is playing */
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if (channel->active == 1){
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INT32 data, chunkNum = 0;
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INT32 base_offset, type, bank, vol_r, vol_l, end_pos;
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/* if the channel is looping, get current chunk to play */
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if (channel->loop == 1){
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chunkNum = channel->chunkNum;
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}
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base_offset = ch*8 + chunkNum*4;
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/* get channel parameters */
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type = ((m_sndregs[base_offset + 1] >> 4) & 0x0f);
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bank = m_banks[((m_sndregs[base_offset + 1] >> 0) & 0x03)];
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vol_l = ((m_sndregs[base_offset + 1] >> 12) & 0x0f);
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vol_r = ((m_sndregs[base_offset + 1] >> 8) & 0x0f);
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end_pos = m_sndregs[base_offset + 2] << 8;
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/* generates output data (range 0x00000..0xffff) */
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if (type == 0x08){
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/* PCM, 8 bits mono */
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data = m_snd_data[bank + end_pos + m_sndregs[base_offset + 3]];
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ch_data_l = m_volume_table[vol_l][data];
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ch_data_r = m_volume_table[vol_r][data];
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m_sndregs[base_offset + 3]--;
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} else if (type == 0x0c){
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/* PCM, 8 bits stereo */
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data = m_snd_data[bank + end_pos + m_sndregs[base_offset + 3]];
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ch_data_l = m_volume_table[vol_l][data];
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m_sndregs[base_offset + 3]--;
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if (m_sndregs[base_offset + 3] > 0){
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data = m_snd_data[bank + end_pos + m_sndregs[base_offset + 3]];
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ch_data_r = m_volume_table[vol_r][data];
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m_sndregs[base_offset + 3]--;
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}
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} else {
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//LOG_SOUND(("(GAE1) Playing unknown sample format in channel: %02d, type: %02x, bank: %02x, end: %08x, Length: %04x\n", ch, type, bank, end_pos, m_sndregs[base_offset + 3]));
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channel->active = 0;
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}
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/* check if the current sample has finished playing */
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if (m_sndregs[base_offset + 3] == 0){
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if (channel->loop == 0){ /* if no looping, we're done */
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channel->active = 0;
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} else { /* if we're looping, swap chunks */
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channel->chunkNum = (channel->chunkNum + 1) & 0x01;
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/* if the length of the next chunk is 0, we're done */
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if (m_sndregs[ch*8 + channel->chunkNum*4 + 3] == 0){
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channel->active = 0;
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}
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}
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}
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}
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/* add the contribution of this channel to the current data output */
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output_l += ch_data_l;
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output_r += ch_data_r;
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}
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for (INT32 i = 0; (i < 7) && (samples > 0); i++) { // simple scaling
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outputs[0] = BURN_SND_CLIP(output_l);
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outputs[1] = BURN_SND_CLIP(output_r);
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outputs += 2;
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samples--;
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}
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}
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}
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/*============================================================================
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CG-1V/GAE1 Read Handler
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============================================================================*/
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UINT16 gaelcosnd_r(INT32 offset)
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{
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//LOG_READ_WRITES(("%s: (GAE1): read from %04x\n", machine().describe_context(), offset));
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return m_sndregs[offset];
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}
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/*============================================================================
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CG-1V/GAE1 Write Handler
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============================================================================*/
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void gaelcosnd_w(INT32 offset, UINT16 data)
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{
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gaelco_sound_channel *channel = &m_channel[offset >> 3];
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m_sndregs[offset] = data;
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switch(offset & 0x07){
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case 0x03:
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/* trigger sound */
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if ((m_sndregs[offset - 1] != 0) && (data != 0)){
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if (!channel->active){
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channel->active = 1;
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channel->chunkNum = 0;
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channel->loop = 0;
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bprintf(0, _T("(GAE1) Playing sample channel: %02d, type: %02x, bank: %02x, end: %08x, Length: %04x\n"), offset >> 3, (m_sndregs[offset - 2] >> 4) & 0x0f, m_sndregs[offset - 2] & 0x03, m_sndregs[offset - 1] << 8, data);
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}
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} else {
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channel->active = 0;
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}
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break;
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case 0x07: /* enable/disable looping */
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if ((m_sndregs[offset - 1] != 0) && (data != 0)){
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bprintf(0, _T("(GAE1) Looping in channel: %02d, type: %02x, bank: %02x, end: %08x, Length: %04x\n"), offset >> 3, (m_sndregs[offset - 2] >> 4) & 0x0f, m_sndregs[offset - 2] & 0x03, m_sndregs[offset - 1] << 8, data);
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channel->loop = 1;
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} else {
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channel->loop = 0;
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}
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break;
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}
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}
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/*============================================================================
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CG-1V/GAE1 Init / Close
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============================================================================*/
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void gaelcosnd_start(UINT8 *soundrom, INT32 offs1, INT32 offs2, INT32 offs3, INT32 offs4)
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{
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m_snd_data = soundrom;
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memset(&m_channel, 0, sizeof(m_channel));
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memset(&m_sndregs, 0, sizeof(m_sndregs));
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gaelco_set_bank_offsets(offs1, offs2, offs3, offs4);
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/* init volume table */
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for (INT32 vol = 0; vol < GAELCO_VOLUME_LEVELS; vol++){
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for (INT32 j = -128; j <= 127; j++){
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m_volume_table[vol][(j ^ 0x80) & 0xff] = (vol*j*256)/(GAELCO_VOLUME_LEVELS - 1);
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}
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}
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}
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void gaelcosnd_exit()
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{
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m_snd_data = NULL;
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}
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void gaelcosnd_scan()
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{
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SCAN_VAR(m_channel);
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SCAN_VAR(m_sndregs);
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}
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7
src/burn/snd/gaelco.h
Normal file
7
src/burn/snd/gaelco.h
Normal file
@ -0,0 +1,7 @@
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// gaelco sound
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void gaelcosnd_update(INT16 *outputs, INT32 samples);
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UINT16 gaelcosnd_r(INT32 offset);
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void gaelcosnd_w(INT32 offset, UINT16 data);
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void gaelcosnd_start(UINT8 *soundrom, int offs1, int offs2, int offs3, int offs4);
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void gaelcosnd_exit();
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void gaelcosnd_scan();
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