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#include <stdint.h>
#include <stdio.h>
#include <playit.h>
#include "til.h"
#include "til_audio.h"
#include "til_fb.h"
#include "til_stream.h"
/* Copyright (C) 2023 - Vito Caputo <vcaputo@pengaru.com> */
/* .IT file playback module via libplayit (SchismTracker) */
#define PLAYIT_DEFAULT_ITFILE "play.it"
#define PLAYIT_DEFAULT_SEEKABLE 0
#define PLAYIT_DEFAULT_BUFSIZE 4096
typedef struct playit_context_t {
til_module_context_t til_module_context;
unsigned last_frame;
playit_t *playit;
til_audio_context_t *audio;
unsigned paused:1;
int16_t buf[];
} playit_context_t;
typedef struct playit_setup_t {
til_setup_t til_setup;
unsigned seekable;
unsigned bufsize;
char itfile[];
} playit_setup_t;
static void playit_audio_seeked(void *hook_context, const til_audio_context_t *audio_context, unsigned ticks);
static void playit_audio_paused(void *hook_context, const til_audio_context_t *audio_context);
static void playit_audio_unpaused(void *hook_context, const til_audio_context_t *audio_context);
til_audio_hooks_t playit_audio_hooks = {
playit_audio_seeked,
playit_audio_paused,
playit_audio_unpaused,
};
static void playit_audio_seeked(void *hook_context, const til_audio_context_t *audio_context, unsigned ticks)
{
playit_context_t *ctxt = hook_context;
assert(((playit_setup_t *)ctxt->til_module_context.setup)->seekable);
playit_seek(ctxt->playit, ticks * 44.1f);
}
static void playit_audio_paused(void *hook_context, const til_audio_context_t *audio_context)
{
playit_context_t *ctxt = hook_context;
ctxt->paused = 1;
}
static void playit_audio_unpaused(void *hook_context, const til_audio_context_t *audio_context)
{
playit_context_t *ctxt = hook_context;
ctxt->paused = 0;
}
static til_module_context_t * playit_create_context(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup)
{
playit_setup_t *s = (playit_setup_t *)setup;
playit_context_t *ctxt;
ctxt = til_module_context_new(module, sizeof(playit_context_t) + s->bufsize * sizeof(ctxt->buf[0]) * 2, stream, seed, ticks, n_cpus, setup);
if (!ctxt)
return NULL;
ctxt->audio = til_stream_get_audio_context(stream);
if (!ctxt->audio)
return til_module_context_free(&ctxt->til_module_context);
if (til_audio_set_hooks(ctxt->audio, &playit_audio_hooks, ctxt) < 0)
return til_module_context_free(&ctxt->til_module_context);
ctxt->playit = playit_open_file(s->itfile, s->seekable ? PLAYIT_FLAG_SEEKABLE : 0);
if (!ctxt->playit)
return til_module_context_free(&ctxt->til_module_context);
return &ctxt->til_module_context;
}
static void playit_destroy_context(til_module_context_t *context)
{
playit_context_t *ctxt = (playit_context_t *)context;
til_audio_unset_hooks(ctxt->audio, &playit_audio_hooks, ctxt);
if (ctxt->playit)
playit_destroy(ctxt->playit);
free(ctxt);
}
static void playit_render_audio(til_module_context_t *context, til_stream_t *stream, unsigned ticks)
{
playit_context_t *ctxt = (playit_context_t *)context;
playit_setup_t *s = (playit_setup_t *)context->setup;
ssize_t tomix = s->bufsize;
unsigned frame, frames;
if (ctxt->paused)
return;
tomix -= til_audio_n_queued(ctxt->audio);
if (tomix <= 0)
return;
frames = playit_update(ctxt->playit, ctxt->buf, tomix * sizeof(int16_t) * 2, &frame);
if (!frames)
return;
til_audio_queue(ctxt->audio, ctxt->buf, frames);
}
static int playit_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup);
til_module_t playit_module = {
.create_context = playit_create_context,
.destroy_context = playit_destroy_context,
.render_audio = playit_render_audio,
.setup = playit_setup,
.name = "playit",
.description = ".IT tracked music file player",
.author = "Vito Caputo <vcaputo@pengaru.com>",
.flags = TIL_MODULE_AUDIO_ONLY,
};
static int playit_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup)
{
til_setting_t *itfile;
til_setting_t *seekable;
til_setting_t *bufsize;
const char *seekable_values[] = {
"off",
"on",
NULL
};
int r;
r = til_settings_get_and_describe_setting(settings,
&(til_setting_spec_t){
.name = ".IT file path",
.key = "itfile",
.preferred = PLAYIT_DEFAULT_ITFILE,
.annotations = NULL
},
&itfile,
res_setting,
res_desc);
if (r)
return r;
r = til_settings_get_and_describe_setting(settings,
&(til_setting_spec_t){
.name = "Seekable",
.key = "seekable",
.regex = "^(on|off)",
.preferred = seekable_values[PLAYIT_DEFAULT_SEEKABLE],
.values = seekable_values,
.annotations = NULL
},
&seekable,
res_setting,
res_desc);
if (r)
return r;
r = til_settings_get_and_describe_setting(settings,
&(til_setting_spec_t){
.name = "Buffer size in frames",
.key = "bufsize",
.preferred = TIL_SETTINGS_STR(PLAYIT_DEFAULT_BUFSIZE),
},
&bufsize,
res_setting,
res_desc);
if (r)
return r;
if (res_setup) {
playit_setup_t *setup;
size_t itfile_len = strlen(itfile->value);
setup = til_setup_new(settings, sizeof(*setup) + itfile_len + 1, NULL, &playit_module);
if (!setup)
return -ENOMEM;
strncpy(setup->itfile, itfile->value, itfile_len);
r = til_value_to_pos(seekable_values, seekable->value, &setup->seekable);
if (r < 0)
return til_setup_free_with_failed_setting_ret_err(&setup->til_setup, seekable, res_setting, r);
if (sscanf(bufsize->value, "%u", &setup->bufsize) != 1)
return til_setup_free_with_failed_setting_ret_err(&setup->til_setup, bufsize, res_setting, -EINVAL);
*res_setup = &setup->til_setup;
}
return 0;
}
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