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/*
DeaDBeeF - ultimate music player for GNU/Linux systems with X11
Copyright (C) 2009 Alexey Yakovenko
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include <SDL/SDL.h>
#include "psdl.h"
#include "streamer.h"
#include "common.h"
static int sdl_player_numsamples = 4096;
static int sdl_player_freq;
static SDL_AudioSpec spec;
static void psdl_callback (void *userdata, Uint8 *stream, int len);
static float sdl_volume = 1;
static inline void
le_int16 (int16_t in, char *out) {
char *pin = (char *)∈
#if !BIGENDIAN
out[0] = pin[0];
out[1] = pin[1];
#else
out[1] = pin[0];
out[0] = pin[1];
#endif
}
int
psdl_init (void) {
SDL_AudioSpec obt;
int formats[] = { AUDIO_S16, -1 };
int freqs[] = { 48000, 44100, 96000, 22050, -1 };
const char *fmtnames[] = { "16 bit signed integer" };
int fmt, frq;
int success = 0;
fprintf (stderr, "sdl_player_init\n");
for (fmt = 0; formats[fmt] != -1; fmt++) {
for (frq = 0; freqs[frq] != -1; frq++) {
fprintf(stderr, "SDL: trying %s @ %dHz\n", fmtnames[fmt], freqs[frq]);
spec.freq = freqs[frq];
spec.format = formats[fmt];
spec.channels = 2;
spec.samples = sdl_player_numsamples;
spec.callback = psdl_callback;
if (SDL_OpenAudio(&spec, &obt) < 0) {
fprintf(stderr, "SDL: couldn't open audio: %s\n", SDL_GetError());
}
else {
success = 1;
break;
}
}
}
if (!success) {
return -1;
}
sdl_player_numsamples = obt.samples; //numsamples;
sdl_player_freq = obt.freq;
fprintf (stderr, "SDL: got %d frame size (requested %d), %dHz\n", obt.samples, sdl_player_numsamples, sdl_player_freq);
return 0;
}
void
psdl_free (void) {
SDL_CloseAudio ();
}
int
psdl_play (void) {
SDL_PauseAudio (0);
return 0;
}
int
psdl_stop (void) {
SDL_PauseAudio (1);
}
int
psdl_ispaused (void) {
return (SDL_GetAudioStatus () == SDL_AUDIO_PAUSED);
}
int
psdl_pause (void) {
SDL_PauseAudio (1);
return 0;
}
int
psdl_unpause (void) {
SDL_PauseAudio (0);
return 0;
}
void
psdl_set_volume (float vol) {
sdl_volume = vol;
}
int
psdl_get_rate (void) {
return sdl_player_freq;
}
static void
psdl_callback (void* userdata, Uint8 *stream, int len) {
int bytesread = streamer_read (stream, len);
int ivolume = sdl_volume * 1000;
for (int i = 0; i < bytesread/2; i++) {
int16_t sample = (int16_t)(((int32_t)(((int16_t*)stream)[i])) * ivolume / 1000);
le_int16 (sample, (char*)&(((int16_t*)stream)[i]));
}
if (bytesread < len) {
memset (stream + bytesread, 0, len-bytesread);
}
}
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