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/*
* Copyright (C) 2003-2015 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.
*/
#include "config.h"
#include "DespotifyInputPlugin.hxx"
#include "lib/despotify/DespotifyUtils.hxx"
#include "../InputStream.hxx"
#include "../InputPlugin.hxx"
#include "tag/Tag.hxx"
#include "util/StringUtil.hxx"
#include "Log.hxx"
extern "C" {
#include <despotify.h>
}
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
class DespotifyInputStream final : public InputStream {
struct despotify_session *session;
struct ds_track *track;
Tag tag;
struct ds_pcm_data pcm;
size_t len_available;
bool eof;
DespotifyInputStream(const char *_uri,
Mutex &_mutex, Cond &_cond,
despotify_session *_session,
ds_track *_track)
:InputStream(_uri, _mutex, _cond),
session(_session), track(_track),
tag(mpd_despotify_tag_from_track(*track)),
len_available(0), eof(false) {
memset(&pcm, 0, sizeof(pcm));
/* Despotify outputs pcm data */
SetMimeType("audio/x-mpd-cdda-pcm");
SetReady();
}
public:
~DespotifyInputStream();
static InputStream *Open(const char *url, Mutex &mutex, Cond &cond,
Error &error);
void Callback(int sig);
/* virtual methods from InputStream */
bool IsEOF() override {
return eof;
}
Tag *ReadTag() override {
if (tag.IsEmpty())
return nullptr;
Tag *result = new Tag(std::move(tag));
tag.Clear();
return result;
}
size_t Read(void *ptr, size_t size, Error &error) override;
private:
void FillBuffer();
};
inline void
DespotifyInputStream::FillBuffer()
{
/* Wait until there is data */
while (1) {
int rc = despotify_get_pcm(session, &pcm);
if (rc == 0 && pcm.len) {
len_available = pcm.len;
break;
}
if (eof == true)
break;
if (rc < 0) {
LogDebug(despotify_domain, "despotify_get_pcm error");
eof = true;
break;
}
/* Wait a while until next iteration */
usleep(50 * 1000);
}
}
inline void
DespotifyInputStream::Callback(int sig)
{
switch (sig) {
case DESPOTIFY_NEW_TRACK:
break;
case DESPOTIFY_TIME_TELL:
break;
case DESPOTIFY_TRACK_PLAY_ERROR:
LogWarning(despotify_domain, "Track play error");
eof = true;
len_available = 0;
break;
case DESPOTIFY_END_OF_PLAYLIST:
eof = true;
LogDebug(despotify_domain, "End of playlist");
break;
}
}
static void callback(gcc_unused struct despotify_session* ds,
int sig, gcc_unused void* data, void* callback_data)
{
DespotifyInputStream *ctx = (DespotifyInputStream *)callback_data;
ctx->Callback(sig);
}
DespotifyInputStream::~DespotifyInputStream()
{
mpd_despotify_unregister_callback(callback);
despotify_free_track(track);
}
inline InputStream *
DespotifyInputStream::Open(const char *url,
Mutex &mutex, Cond &cond,
gcc_unused Error &error)
{
if (!StringStartsWith(url, "spt://"))
return nullptr;
despotify_session *session = mpd_despotify_get_session();
if (session == nullptr)
return nullptr;
ds_link *ds_link = despotify_link_from_uri(url + 6);
if (!ds_link) {
FormatDebug(despotify_domain, "Can't find %s", url);
return nullptr;
}
if (ds_link->type != LINK_TYPE_TRACK) {
despotify_free_link(ds_link);
return nullptr;
}
ds_track *track = despotify_link_get_track(session, ds_link);
despotify_free_link(ds_link);
if (!track)
return nullptr;
DespotifyInputStream *ctx =
new DespotifyInputStream(url, mutex, cond,
session, track);
if (!mpd_despotify_register_callback(callback, ctx)) {
delete ctx;
return nullptr;
}
if (despotify_play(ctx->session, ctx->track, false) == false) {
mpd_despotify_unregister_callback(callback);
delete ctx;
return nullptr;
}
return ctx;
}
static InputStream *
input_despotify_open(const char *url, Mutex &mutex, Cond &cond, Error &error)
{
return DespotifyInputStream::Open(url, mutex, cond, error);
}
size_t
DespotifyInputStream::Read(void *ptr, size_t read_size,
gcc_unused Error &error)
{
if (len_available == 0)
FillBuffer();
size_t to_cpy = std::min(read_size, len_available);
memcpy(ptr, pcm.buf, to_cpy);
len_available -= to_cpy;
offset += to_cpy;
return to_cpy;
}
const InputPlugin input_plugin_despotify = {
"despotify",
nullptr,
nullptr,
input_despotify_open,
};
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