diff options
Diffstat (limited to 'backends/gp32/gp32std_sound.cpp')
| -rw-r--r-- | backends/gp32/gp32std_sound.cpp | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/backends/gp32/gp32std_sound.cpp b/backends/gp32/gp32std_sound.cpp deleted file mode 100644 index 56335f1c4f..0000000000 --- a/backends/gp32/gp32std_sound.cpp +++ /dev/null @@ -1,188 +0,0 @@ -/* ScummVM - Scumm Interpreter - * Copyright (C) 2001-2006 The ScummVM project - * Copyright (C) 2002 Ph0x - GP32 Backend - * Copyright (C) 2003/2004 DJWillis - GP32 Backend - * Copyright (C) 2005 Won Star - GP32 Backend - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - * $URL$ - * $Id$ - * - */ - -#include "stdafx.h" -#include "common/scummsys.h" - -#include "gp32std.h" -#include "gp32std_sound.h" - -#define GP32_TIMER_AUDIO_IDX 0 - -// Global variables -static volatile unsigned int frame = 0; -static volatile unsigned int *soundPos = 0; -static volatile int idx_buf; -static volatile unsigned int shiftVal = 0; -static void *buffer; -static GPSOUNDBUF soundBuf; - -// This routine gets called by the timer interrupt and -// polls the current playing position within the buffer. - -static void soundTimer() { - static int locked = false; - - if (locked) { - return; - } - - locked = true; - - unsigned int sampleshiftVal = soundBuf.samples << shiftVal; - unsigned int t = (((unsigned int)(*soundPos) - (unsigned int)buffer) >> shiftVal) >= soundBuf.samples ? 1 : 0; - if (t != frame) { - unsigned int offs = ((frame == 1) ? (sampleshiftVal) : 0); - //memset((uint8 *)buffer + offs, 0, sampleshiftVal); - soundBuf.callback(soundBuf.userdata, (uint8 *)((unsigned int)buffer + offs), sampleshiftVal); - frame = t; - { - // Play silence - register uint16 *d = (uint16 *)((uint8 *)buffer + offs); // alignment-safe - register uint32 max = (uint32)((uint8 *)buffer + offs + sampleshiftVal); - do { - *d++ ^= 0x8000; // 1 - *d++ ^= 0x8000; // 2 - *d++ ^= 0x8000; // 3 - *d++ ^= 0x8000; // 4 - *d++ ^= 0x8000; // 5 - *d++ ^= 0x8000; // 6 - *d++ ^= 0x8000; // 7 - *d++ ^= 0x8000; // 8 - *d++ ^= 0x8000; // 9 - *d++ ^= 0x8000; // 10 - *d++ ^= 0x8000; // 11 - *d++ ^= 0x8000; // 12 - *d++ ^= 0x8000; // 13 - *d++ ^= 0x8000; // 14 - *d++ ^= 0x8000; // 15 - *d++ ^= 0x8000; // 16 - *d++ ^= 0x8000; // 17 - *d++ ^= 0x8000; // 18 - *d++ ^= 0x8000; // 19 - *d++ ^= 0x8000; // 20 - *d++ ^= 0x8000; // 21 - *d++ ^= 0x8000; // 22 - *d++ ^= 0x8000; // 23 - *d++ ^= 0x8000; // 24 - *d++ ^= 0x8000; // 25 - *d++ ^= 0x8000; // 26 - *d++ ^= 0x8000; // 27 - *d++ ^= 0x8000; // 28 - *d++ ^= 0x8000; // 29 - *d++ ^= 0x8000; // 30 - *d++ ^= 0x8000; // 31 - *d++ ^= 0x8000; // 32 - } while ((uint32)d < max); - } - } - - locked = false; -} - -int gp_soundBufStart(GPSOUNDBUF *sb) { - int bufferSize = 0; - - PCM_SR gpFreq = PCM_S11; - PCM_BIT gpFormat = PCM_16BIT; - - frame = 0; - - // Copy the structure - memcpy(&soundBuf, sb, sizeof(GPSOUNDBUF)); - - // Calculate size of a single sample in bytes - // and a corresponding shift value - shiftVal = 0; - - switch (soundBuf.format) { - case 8: - gpFormat = PCM_8BIT; - break; - case 16: - gpFormat = PCM_16BIT; - shiftVal++; - break; - } - - switch (soundBuf.freq) { - case 11025: - if (soundBuf.channels == 2) { - gpFreq = PCM_S11; - shiftVal++; - } else - gpFreq = PCM_M11; - break; - case 22050: - if (soundBuf.channels == 2) { - gpFreq = PCM_S22; - shiftVal++; - } else - gpFreq = PCM_M22; - break; - case 44100: - if (soundBuf.channels == 2) { - gpFreq = PCM_S44; - shiftVal++; - } else - gpFreq = PCM_M44; - break; - } - - soundBuf.samplesize = 1 << shiftVal; - - // Allocate memory for the playing buffer - bufferSize = soundBuf.samplesize * soundBuf.samples * 2; - buffer = malloc(bufferSize); - - // Clear the buffer - uint16 *tmpBuf = (uint16 *)buffer; - for (int i = 0; i < bufferSize / 2; i++) - tmpBuf[i] = 0x8000; - - // Frequency of the timer interrupt which polls the playing position - // FIXME: This frequency should not be multiplied by 4. - soundBuf.pollfreq = 4 * (2 * soundBuf.freq) / soundBuf.samples; - - // Set timer interrupt - if (GpTimerOptSet(GP32_TIMER_AUDIO_IDX, soundBuf.pollfreq, 0, soundTimer) == GPOS_ERR_ALREADY_USED) { - GPDEBUG(" Timer is already used... kill timer"); - GpTimerKill(GP32_TIMER_AUDIO_IDX); - } - GpTimerSet(GP32_TIMER_AUDIO_IDX); - - GpPcmInit(gpFreq, gpFormat); - GpPcmPlay((unsigned short *)buffer, bufferSize, 1); - GpPcmLock((unsigned short *)buffer, (int *)&idx_buf, (unsigned int *)&soundPos); - - return 0; -} - -void gp_soundBufStop() { - GpTimerKill(GP32_TIMER_AUDIO_IDX); - GpPcmStop(); - GpPcmRemove((unsigned short *)buffer); - free(buffer); -} |