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#include <stdio.h>
#include <stdlib.h>
#include <alsa/asoundlib.h>
#include "sndfile.h"
#include "fmt.h"
/*
* gcc -O2 -o playit-alsa playit-alsa.c -I.. -I../src/include -DHAVE_CONFIG_H -lm `pkg-config alsa --cflags --libs` -s ../src/libplayit.a
*/
song_t * song_load_it(const char *file)
{
slurp_t *s;
song_t *song;
s = slurp(file, NULL, 0);
if (!s) {
printf("failed to open \"%s\"\n", file);
goto _fail;
}
song = csf_allocate();
if (!song) {
printf("failed to allocate song\n");
goto _fail_slurp;
}
if (fmt_it_load_song(song, s, 0) != LOAD_SUCCESS)
goto _fail_song;
unslurp(s);
return song;
_fail_song:
csf_free(song);
_fail_slurp:
unslurp(s);
_fail:
return NULL;
}
static snd_pcm_t * alsa_open(const char *dev)
{
snd_pcm_hw_params_t *hw_params;
snd_pcm_sw_params_t *sw_params;
int err;
unsigned int rate = 44100;
snd_pcm_t *pcm;
if((err = snd_pcm_open(&pcm, dev, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
fprintf(stderr, "cannot open audio device %s (%s)\n",
dev,
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_hw_params_malloc(&hw_params)) < 0) {
fprintf(stderr, "cannot allocate hardware parameter structure(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_hw_params_any(pcm, hw_params)) < 0) {
fprintf(stderr, "cannot initialize hardware parameter structure(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_hw_params_set_access(pcm, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
fprintf(stderr, "cannot set access type(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_hw_params_set_format(pcm, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) {
fprintf(stderr, "cannot set sample format(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_hw_params_set_rate_near(pcm, hw_params, &rate, 0)) < 0) {
fprintf(stderr, "cannot set sample rate(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_hw_params_set_channels(pcm, hw_params, 2)) < 0) {
fprintf(stderr, "cannot set channel count(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_hw_params(pcm, hw_params)) < 0) {
fprintf(stderr, "cannot set parameters(%s)\n",
snd_strerror(err));
return NULL;
}
snd_pcm_hw_params_free(hw_params);
if((err = snd_pcm_sw_params_malloc(&sw_params)) < 0) {
fprintf(stderr, "cannot allocate software parameters structure(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_sw_params_current(pcm, sw_params)) < 0) {
fprintf(stderr, "cannot initialize software parameters structure(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_sw_params_set_avail_min(pcm, sw_params, 4096)) < 0) {
fprintf(stderr, "cannot set minimum available count(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_sw_params_set_start_threshold(pcm, sw_params, 0U)) < 0) {
fprintf(stderr, "cannot set start mode(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_sw_params(pcm, sw_params)) < 0) {
fprintf(stderr, "cannot set software parameters(%s)\n",
snd_strerror(err));
return NULL;
}
if((err = snd_pcm_prepare(pcm)) < 0) {
fprintf(stderr, "cannot prepare audio interface for use(%s)\n",
snd_strerror(err));
return NULL;
}
return pcm;
}
static void alsa_close(snd_pcm_t *pcm)
{
snd_pcm_close(pcm);
}
int main(int argc, char *argv[])
{
song_t *song;
uint8_t buf[8192];
int len;
snd_pcm_t *pcm;
if (argc != 2) {
printf("usage: %s song.it\n", argv[0]);
goto _fail;
}
song = song_load_it(argv[1]);
if (!song) {
printf("failed to load song!\n");
goto _fail;
}
if (!(pcm = alsa_open("default"))) {
printf("Failed to open ALSA device\n");
goto _fail_song;
}
csf_set_current_order(song, 0);
song->repeat_count = 0;
song->buffer_count = 0;
song->stop_at_order = -1;
song->stop_at_row = -1;
song->flags &= ~(SONG_PAUSED | SONG_PATTERNLOOP | SONG_ENDREACHED);
csf_reset_playmarks(song);
csf_set_resampling_mode(song, SRCMODE_LINEAR);
csf_set_wave_config(song, 44100, 16, 2);
while ((len = csf_read(song, buf, sizeof(buf)))) {
int err;
if ((err = snd_pcm_writei(pcm, buf, len)) < 0) {
fprintf (stderr, "write failed (%s)\n", snd_strerror(err));
break;
}
}
alsa_close(pcm);
return EXIT_SUCCESS;
_fail_song:
/* TODO cleanup song */
_fail:
return EXIT_FAILURE;
}
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