forked from len0rd/rockbox
4597ebe24b
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13604 a1c6a512-1295-4272-9138-f99709370657
114 lines
2.1 KiB
C
114 lines
2.1 KiB
C
#include "rockmacros.h"
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#include "defs.h"
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#include "pcm.h"
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struct pcm pcm IBSS_ATTR;
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#define N_BUFS 2
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#define BUF_SIZE 1024
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#if CONFIG_CODEC == SWCODEC && !defined(SIMULATOR)
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bool doneplay=1;
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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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*start = (unsigned char*)(&gmbuf[pcm.len*doneplay]);
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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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if(plugbuf)
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return;
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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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{
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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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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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#if INPUT_SRC_CAPS != 0
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/* Select playback */
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rb->audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
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rb->audio_set_output_source(AUDIO_SRC_PLAYBACK);
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#endif
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rb->pcm_set_frequency(SAMPR_11); /* 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(HW_SAMPR_DEFAULT);
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}
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int pcm_submit(void)
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{
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register int i;
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if (pcm.pos < pcm.len) return 1;
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doneplay=!doneplay;
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if(doneplay)
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pcm.buf = buf + pcm.len;
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else
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pcm.buf = buf;
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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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gmbuf[i+pcm.len*doneplay] = (pcm.buf[i]<<8)-0x8000;
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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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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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