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// this is a decoder plugin skeleton
// use to create new decoder plugins
#include <stdlib.h>
#include <string.h>
#include <deadbeef/deadbeef.h>
#define trace(...) { fprintf(stderr, __VA_ARGS__); }
static DB_decoder_t plugin;
static DB_functions_t *deadbeef;
typedef struct {
DB_fileinfo_t info;
int startsample;
int endsample;
int currentsample;
} example_info_t;
static const char * exts[] = { "example", NULL }; // e.g. mp3
static const char *filetypes[] = { "example", NULL }; // e.g. MP3
// allocate codec control structure
static DB_fileinfo_t *
example_open (uint32_t hints) {
DB_fileinfo_t *_info = malloc (sizeof (example_info_t));
example_info_t *info = (example_info_t *)_info;
memset (info, 0, sizeof (example_info_t));
return _info;
}
// prepare to decode the track, fill in mandatory plugin fields
// return -1 on failure
static int
example_init (DB_fileinfo_t *_info, DB_playItem_t *it) {
example_info_t *info = (example_info_t *)_info;
// take this parameters from your input file
// we set constants for clarity sake
_info->fmt.bps = 16;
_info->fmt.channels = 2;
_info->fmt.samplerate = 44100;
for (int i = 0; i < _info->fmt.channels; i++) {
_info->fmt.channelmask |= 1 << i;
}
_info->readpos = 0;
_info->plugin = &plugin;
if (it->endsample > 0) {
info->startsample = it->startsample;
info->endsample = it->endsample;
plugin.seek_sample (_info, 0);
}
else {
info->startsample = 0;
int TOTALSAMPLES = 1000; // calculate from file
info->endsample = TOTALSAMPLES-1;
}
return 0;
}
// free everything allocated in _init
static void
example_free (DB_fileinfo_t *_info) {
example_info_t *info = (example_info_t *)_info;
if (info) {
free (info);
}
}
// try decode `size' bytes
// return number of decoded bytes
// or 0 on EOF/error
static int
example_read (DB_fileinfo_t *_info, char *bytes, int size) {
example_info_t *info = (example_info_t *)_info;
info->currentsample += size / (_info->fmt.channels * _info->fmt.bps/8);
return size;
}
// seek to specified sample (frame)
// return 0 on success
// return -1 on failure
static int
example_seek_sample (DB_fileinfo_t *_info, int sample) {
example_info_t *info = (example_info_t *)_info;
info->currentsample = sample + info->startsample;
_info->readpos = (float)sample / _info->fmt.samplerate;
return 0;
}
// seek to specified time in seconds
// return 0 on success
// return -1 on failure
static int
example_seek (DB_fileinfo_t *_info, float time) {
return example_seek_sample (_info, time * _info->fmt.samplerate);
}
// read information from the track
// load/process cuesheet if exists
// insert track into playlist
// return track pointer on success
// return NULL on failure
static DB_playItem_t *
example_insert (DB_playItem_t *after, const char *fname) {
// open file
DB_FILE *fp = deadbeef->fopen (fname);
if (!fp) {
trace ("example: failed to fopen %s\n", fname);
return NULL;
}
decoder_info_t *di = decoder_open ();
if (!di) {
trace ("example: failed to init decoder\n");
return NULL;
}
// read track info/tags
track_info_t ti;
if (decoder_read_info (&ti) < 0) {
trace ("example: failed to read info\n");
decoder_free (di);
return NULL;
}
// now we should have track duration, and can try loading cuesheet
// 1st try embedded cuesheet
if (ti.embeddedcuesheet[0]) {
DB_playItem_t *cue = deadbeef->pl_insert_cue_from_buffer (after, fname, ti.embeddedcuesheet, strlen (ti.embeddedcuesheet), &plugin, plugin.filetypes[0], ti.total_num_samples, ti.samplerate);
if (cue) {
// cuesheet loaded
decoder_free (di);
return cue;
}
}
// embedded cuesheet not found, try external one
DB_playItem_t *cue = deadbeef->pl_insert_cue (after, fname, &plugin, plugin.filetypes[0], ti.total_num_samples, ti.samplerate);
if (cue) {
// cuesheet loaded
decoder_free (di);
return cue;
}
// no cuesheet, prepare track for addition
DB_playItem_t *it = deadbeef->pl_item_alloc ();
it->decoder_id = deadbeef->plug_get_decoder_id (plugin.plugin.id);
it->fname = strdup (fname);
it->filetype = filetypes[0];
deadbeef->pl_set_item_duration (it, (float)ti.total_num_samples/ti.samplerate);
// add metainfo
if (!strlen (ti.title)) {
// title is empty, this call will set track title to filename without extension
deadbeef->pl_add_meta (it, "title", NULL);
}
else {
deadbeef->pl_add_meta (it, "title", ti.title);
}
deadbeef->pl_add_meta (it, "artist", ti.artist);
// ... etc ...
// free decoder
decoder_free (di);
// now the track is ready, insert into playlist
after = deadbeef->pl_insert_item (after, it);
deadbeef->pl_item_unref (it);
return after;
}
static int
example_start (void) {
// do one-time plugin initialization here
// e.g. starting threads for background processing, subscribing to events, etc
// return 0 on success
// return -1 on failure
return 0;
}
static int
example_stop (void) {
// undo everything done in _start here
// return 0 on success
// return -1 on failure
return 0;
}
// define plugin interface
static DB_decoder_t plugin = {
DB_PLUGIN_SET_API_VERSION
.plugin.version_major = 0,
.plugin.version_minor = 1,
.plugin.type = DB_PLUGIN_DECODER,
.plugin.name = "short plugin name",
.plugin.descr = "plugin description",
.plugin.author = "author name",
.plugin.email = "author email",
.plugin.website = "author/plugin website",
.plugin.start = example_start,
.plugin.stop = example_stop,
.init = example_init,
.free = example_free,
.read = example_read,
.seek = example_seek,
.seek_sample = example_seek_sample,
.insert = example_insert,
.exts = exts,
.id = "example",
.filetypes = filetypes
};
DB_plugin_t *
example_load (DB_functions_t *api) {
deadbeef = api;
return DB_PLUGIN (&plugin);
}
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