forked from len0rd/rockbox
54b3b6f797
Kind of skippy and only supports WAV. MP3 would be nice, especially if using Rockbox's codec. Change-Id: I0bba195603da32da1e4d1dcf2ee821fa5696824a
105 lines
2.1 KiB
C
105 lines
2.1 KiB
C
|
|
#include <stdio.h>
|
|
#include "SDL_audio.h"
|
|
#include "SDL_byteorder.h"
|
|
#include "SDL_mixer.h"
|
|
#include "quakedef.h"
|
|
|
|
static dma_t the_shm;
|
|
static int snd_inited;
|
|
|
|
extern int desired_speed;
|
|
extern int desired_bits;
|
|
|
|
// SDL hereby demands `len' samples in stream, *NOW*!
|
|
static void paint_audio(int chan, Uint8 *stream, int len, void *unused)
|
|
{
|
|
if ( shm ) {
|
|
shm->buffer = stream;
|
|
shm->samplepos += len/(shm->samplebits/8)/2;
|
|
// Check for samplepos overflow?
|
|
S_PaintChannels (shm->samplepos);
|
|
}
|
|
}
|
|
|
|
qboolean SNDDMA_Init(void)
|
|
{
|
|
SDL_AudioSpec desired, obtained;
|
|
|
|
snd_inited = 0;
|
|
|
|
/* Set up the desired format */
|
|
desired.freq = desired_speed;
|
|
switch (desired_bits) {
|
|
case 8:
|
|
desired.format = AUDIO_U8;
|
|
break;
|
|
case 16:
|
|
if ( SDL_BYTEORDER == SDL_BIG_ENDIAN )
|
|
desired.format = AUDIO_S16MSB;
|
|
else
|
|
desired.format = AUDIO_S16LSB;
|
|
break;
|
|
default:
|
|
Con_Printf("Unknown number of audio bits: %d\n",
|
|
desired_bits);
|
|
return 0;
|
|
}
|
|
desired.channels = 2;
|
|
desired.samples = 1024;
|
|
//desired.callback = paint_audio;
|
|
|
|
if( Mix_OpenAudio(desired_speed, desired.format, desired.channels, desired.samples) < 0 )
|
|
{
|
|
Con_Printf("Couldn't open SDL audio: %s\n", Mix_GetError());
|
|
return 0;
|
|
}
|
|
|
|
Mix_RegisterEffect(0, paint_audio, NULL, NULL);
|
|
|
|
#if 0
|
|
/* Open the audio device */
|
|
if ( SDL_OpenAudio(&desired, &obtained) < 0 ) {
|
|
Con_Printf("Couldn't open SDL audio: %s\n", SDL_GetError());
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
void *blank_buf = (Uint8 *)malloc(4096);
|
|
memset(blank_buf, 0, 4096);
|
|
|
|
Mix_Chunk *blank = Mix_QuickLoad_RAW(blank_buf, 4096);
|
|
|
|
Mix_PlayChannel(0, blank, -1);
|
|
|
|
SDL_PauseAudio(0);
|
|
|
|
/* Fill the audio DMA information block */
|
|
shm = &the_shm;
|
|
shm->splitbuffer = 0;
|
|
shm->samplebits = (desired.format & 0xFF);
|
|
shm->speed = desired.freq;
|
|
shm->channels = desired.channels;
|
|
shm->samples = desired.samples*shm->channels;
|
|
shm->samplepos = 0;
|
|
shm->submission_chunk = 1;
|
|
shm->buffer = NULL;
|
|
|
|
snd_inited = 1;
|
|
return 1;
|
|
}
|
|
|
|
int SNDDMA_GetDMAPos(void)
|
|
{
|
|
return shm->samplepos;
|
|
}
|
|
|
|
void SNDDMA_Shutdown(void)
|
|
{
|
|
if (snd_inited)
|
|
{
|
|
SDL_CloseAudio();
|
|
snd_inited = 0;
|
|
}
|
|
}
|
|
|