forked from len0rd/rockbox
2882b26a99
1) Adapt Rockboy to smaller screens (H10, X5, and iPod Nano). 2) Add the ability to use a preset palette on color targets. Choose 'Set Palette' from the main menu. 3) Clean up the code to remove any unused code and variables. 4) Changed tabs to spaces. 5) Disable reading and writing sound when sound is disabled. 6) Disbable writing to the RTC since it is not implemented yet. 7) Minor optimizations from WAC gnuboy CE and iBoy. 8) Massive clean up of code to make it appear consistent. 9) Change all C++ style comments to C style. 10) Completely reorganize dynarec. Add fixmes to all unimplemented opcodes. Add debug writes for all opcodes. Attempt to implement a few opcodes myself. 11) Silence some warnings when built using dynarec. 12) Minor reshuffling of IRAM, may or not offer a speed increase. 13) Include fixes found in the short-lived gnuboy CVS. All in all, there's about a 10% improvement on my test roms when sound is disabled and slight improvement with sound. Especially noticable when there are few sprites on screen and less action is occurring. See FS #6567. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12216 a1c6a512-1295-4272-9138-f99709370657
141 lines
2.8 KiB
C
141 lines
2.8 KiB
C
#include "rockmacros.h"
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#include "defs.h"
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#include "pcm.h"
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/*#define ONEBUF*/
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/* Note: I think the single buffer implementation is more
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* responsive with sound(less lag) but it creates more
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* choppyness overall to the sound. 2 buffer's don't seem to
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* make a difference, but 4 buffers is definately noticable
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*/
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struct pcm pcm IBSS_ATTR;
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bool sound = 1;
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#ifdef ONEBUF
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#define N_BUFS 1
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#else
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#define N_BUFS 4
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#endif
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#define BUF_SIZE 1024
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#if CONFIG_CODEC == SWCODEC && !defined(SIMULATOR)
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#ifndef ONEBUF
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static short curbuf,gmcurbuf;
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#else
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bool doneplay=0;
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#endif
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static unsigned char *buf=0;
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static unsigned short *gmbuf;
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static bool newly_started;
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void get_more(unsigned char** start, size_t* size)
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{
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#ifdef ONEBUF
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doneplay=1;
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*start = (unsigned char*)(gmbuf);
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#else
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*start = (unsigned char*)(&gmbuf[pcm.len*curbuf]);
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#endif
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*size = BUF_SIZE*sizeof(short);
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}
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void pcm_init(void)
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{
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newly_started = true;
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pcm.hz = 11025;
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pcm.stereo = 1;
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pcm.len = BUF_SIZE;
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if(!buf){
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buf = my_malloc(pcm.len * N_BUFS);
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gmbuf = my_malloc(pcm.len * N_BUFS*sizeof (short));
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pcm.buf = buf;
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pcm.pos = 0;
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#ifndef ONEBUF
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curbuf = gmcurbuf= 0;
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#endif
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memset(gmbuf, 0, pcm.len * N_BUFS *sizeof(short));
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memset(buf, 0, pcm.len * N_BUFS);
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}
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rb->pcm_play_stop();
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rb->pcm_set_frequency(11025); /* 44100 22050 11025 */
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}
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void pcm_close(void)
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{
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memset(&pcm, 0, sizeof pcm);
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newly_started = true;
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rb->pcm_play_stop();
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rb->pcm_set_frequency(44100);
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}
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int pcm_submit(void)
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{
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if (!options.sound) return 1;
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register int i;
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if (!sound) {
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pcm.pos = 0;
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return 0;
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}
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if (pcm.pos < pcm.len) return 1;
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#ifndef ONEBUF
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curbuf = (curbuf + 1) % N_BUFS;
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pcm.buf = buf + pcm.len * curbuf;
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#endif
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pcm.pos = 0;
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/* gotta convert the 8 bit buffer to 16 */
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for(i=0; i<pcm.len;i++)
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#ifdef ONEBUF
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gmbuf[i] = (pcm.buf[i]<<8)-0x8000;
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#else
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gmbuf[i+pcm.len*curbuf] = (pcm.buf[i]<<8)-0x8000;
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#endif
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if(newly_started)
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{
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rb->pcm_play_data(&get_more,NULL,0);
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newly_started = false;
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}
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/* this while loop and done play are in place to make sure the sound timing
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* is correct(although it's not)
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*/
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#ifdef ONEBUF
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while(doneplay==0) rb->yield();
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doneplay=0;
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#endif
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return 1;
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}
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#else
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static byte buf1_unal[(BUF_SIZE / sizeof(short)) + 2]; /* 4 byte aligned */
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void pcm_init(void)
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{
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pcm.hz = 11025;
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pcm.stereo = 1;
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pcm.buf = buf1_unal;
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pcm.len = (BUF_SIZE / sizeof(short));
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pcm.pos = 0;
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}
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void pcm_close(void)
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{
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memset(&pcm, 0, sizeof pcm);
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}
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int pcm_submit(void)
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{
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pcm.pos =0;
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return 0;
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}
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#endif
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