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/*
DeaDBeeF - ultimate music player for GNU/Linux systems with X11
Copyright (C) 2009-2010 Alexey Yakovenko <waker@users.sourceforge.net>
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 2
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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
// this is a decoder plugin skeleton
// use to create new decoder plugins
#include "../../deadbeef.h"
static DB_decoder_t plugin;
static DB_functions_t *deadbeef;
static const char * exts[] = { "example", NULL }; // e.g. mp3
static const char *filetypes[] = { "example", NULL }; // e.g. MP3
static int
example_init (DB_playItem_t *it) {
// prepare to decode the track
// return -1 on failure
// fill in mandatory plugin fields
plugin.info.bps = deadbeef->get_output ()->bitspersample ();
plugin.info.channels = deadbeef->get_output ()->channels ();
plugin.info.samplerate = decoder->samplerate;
plugin.info.readpos = 0;
return 0;
}
static void
example_free (void) {
// free everything allocated in _init
}
static int
example_read_int16 (char *bytes, int size) {
// try decode `size' bytes
// return number of decoded bytes
// return 0 on EOF
plugin.info.readpos = (float)currentsample / plugin.info.samplerate;
return size;
}
static int
example_seek_sample (int sample) {
// seek to specified sample (frame)
// return 0 on success
// return -1 on failure
// update readpos
plugin.info.readpos = (float)sample / plugin.info.samplerate;
return 0;
}
static int
example_seek (float time) {
// seek to specified time in seconds
// return 0 on success
// return -1 on failure
return example_seek_sample (time * plugin.info.samplerate);
return 0;
}
static DB_playItem_t *
example_insert (DB_playItem_t *after, const char *fname) {
// read information from the track
// load/process cuesheet if exists
// insert track into playlist
// return track pointer on success
// return NULL on failure
example:
// open file
DB_FILE *fp = deadbeef->fopen (fname);
if (!fp) {
trace ("example: failed to fopen %s\n", fname);
return NULL;
}
// setup decoder to use vfs
decoder_callbacks_t cb = {
open = vfs_open_wrapper,
.... etc ....
}
decoder_info_t *di = decoder_open_callbacks (&cb);
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 = &plugin;
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);
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_int16 = example_read_int16,
// .read_float32 = example_read_float32,
.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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