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Sent: Tuesday, December 09, 2008 8:13 PM To: submit@mamedev.org Cc: atariace@hotmail.com Subject: [patch] Add device parameter to stream_create() Hi mamedev, This patch adds the sound device to the parameters passed to stream_create so that the global Machine can be removed from streams.c. It assumes my previous patch which added CUSTOM_START and SAMPLES_START has been applied. ~aa
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
#include "sndintrf.h"
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#include "streams.h"
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#include "tms3615.h"
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#define VMIN 0x0000
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#define VMAX 0x7fff
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#define TONES 13
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static const int divisor[TONES] = { 478, 451, 426, 402, 379, 358, 338, 319, 301, 284, 268, 253, 239 };
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struct TMS3615 {
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sound_stream *channel; /* returned by stream_create() */
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int samplerate; /* output sample rate */
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int basefreq; /* chip's base frequency */
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int counter8[TONES]; /* tone frequency counter for 8' */
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int counter16[TONES]; /* tone frequency counter for 16'*/
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int output8; /* output signal bits for 8' */
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int output16; /* output signal bits for 16' */
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int enable; /* mask which tones to play */
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};
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static void tms3615_sound_update(void *param, stream_sample_t **inputs, stream_sample_t **_buffer, int length)
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{
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struct TMS3615 *tms = param;
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int samplerate = tms->samplerate;
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stream_sample_t *buffer8 = _buffer[TMS3615_FOOTAGE_8];
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stream_sample_t *buffer16 = _buffer[TMS3615_FOOTAGE_16];
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while( length-- > 0 )
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{
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int sum8 = 0, sum16 = 0, tone = 0;
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for (tone = 0; tone < TONES; tone++)
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{
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// 8'
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tms->counter8[tone] -= (tms->basefreq / divisor[tone]);
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while( tms->counter8[tone] <= 0 )
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{
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tms->counter8[tone] += samplerate;
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tms->output8 ^= 1 << tone;
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}
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if (tms->output8 & tms->enable & (1 << tone))
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{
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sum8 += VMAX;
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}
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// 16'
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tms->counter16[tone] -= (tms->basefreq / divisor[tone] / 2);
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while( tms->counter16[tone] <= 0 )
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{
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tms->counter16[tone] += samplerate;
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tms->output16 ^= 1 << tone;
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}
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if (tms->output16 & tms->enable & (1 << tone))
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{
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sum16 += VMAX;
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}
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}
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*buffer8++ = sum8 / TONES;
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*buffer16++ = sum16 / TONES;
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}
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tms->enable = 0;
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}
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void tms3615_enable_w(int chip, int enable)
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{
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struct TMS3615 *tms = sndti_token(SOUND_TMS3615, chip);
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tms->enable = enable;
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}
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static SND_START( tms3615 )
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{
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struct TMS3615 *tms;
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tms = auto_malloc(sizeof(*tms));
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memset(tms, 0, sizeof(*tms));
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tms->channel = stream_create(device, 0, 2, clock/8, tms, tms3615_sound_update);
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tms->samplerate = clock/8;
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tms->basefreq = clock;
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return tms;
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}
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/**************************************************************************
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* Generic get_info
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**************************************************************************/
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static SND_SET_INFO( tms3615 )
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{
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switch (state)
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{
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/* no parameters to set */
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}
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}
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SND_GET_INFO( tms3615 )
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{
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switch (state)
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{
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/* --- the following bits of info are returned as 64-bit signed integers --- */
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/* --- the following bits of info are returned as pointers to data or functions --- */
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case SNDINFO_PTR_SET_INFO: info->set_info = SND_SET_INFO_NAME( tms3615 ); break;
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case SNDINFO_PTR_START: info->start = SND_START_NAME( tms3615 ); break;
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case SNDINFO_PTR_STOP: /* Nothing */ break;
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case SNDINFO_PTR_RESET: /* Nothing */ break;
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/* --- the following bits of info are returned as NULL-terminated strings --- */
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case SNDINFO_STR_NAME: info->s = "TMS3615"; break;
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case SNDINFO_STR_CORE_FAMILY: info->s = "TI PSG"; break;
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case SNDINFO_STR_CORE_VERSION: info->s = "1.0"; break;
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case SNDINFO_STR_CORE_FILE: info->s = __FILE__; break;
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case SNDINFO_STR_CORE_CREDITS: info->s = "Copyright Nicola Salmoria and the MAME Team"; break;
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}
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}
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