228 lines
4.8 KiB
C++
228 lines
4.8 KiB
C++
/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "DespotifyInputPlugin.hxx"
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#include "lib/despotify/DespotifyUtils.hxx"
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#include "../InputStream.hxx"
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#include "../InputPlugin.hxx"
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#include "tag/Tag.hxx"
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#include "util/StringUtil.hxx"
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#include "Log.hxx"
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extern "C" {
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#include <despotify.h>
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}
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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class DespotifyInputStream final : public InputStream {
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struct despotify_session *session;
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struct ds_track *track;
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Tag tag;
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struct ds_pcm_data pcm;
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size_t len_available;
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bool eof;
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DespotifyInputStream(const char *_uri,
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Mutex &_mutex, Cond &_cond,
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despotify_session *_session,
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ds_track *_track)
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:InputStream(_uri, _mutex, _cond),
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session(_session), track(_track),
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tag(mpd_despotify_tag_from_track(*track)),
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len_available(0), eof(false) {
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memset(&pcm, 0, sizeof(pcm));
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/* Despotify outputs pcm data */
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SetMimeType("audio/x-mpd-cdda-pcm");
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SetReady();
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}
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public:
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~DespotifyInputStream();
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static InputStream *Open(const char *url, Mutex &mutex, Cond &cond,
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Error &error);
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void Callback(int sig);
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/* virtual methods from InputStream */
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bool IsEOF() override {
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return eof;
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}
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Tag *ReadTag() override {
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if (tag.IsEmpty())
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return nullptr;
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Tag *result = new Tag(std::move(tag));
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tag.Clear();
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return result;
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}
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size_t Read(void *ptr, size_t size, Error &error) override;
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private:
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void FillBuffer();
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};
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inline void
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DespotifyInputStream::FillBuffer()
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{
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/* Wait until there is data */
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while (1) {
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int rc = despotify_get_pcm(session, &pcm);
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if (rc == 0 && pcm.len) {
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len_available = pcm.len;
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break;
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}
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if (eof == true)
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break;
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if (rc < 0) {
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LogDebug(despotify_domain, "despotify_get_pcm error");
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eof = true;
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break;
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}
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/* Wait a while until next iteration */
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usleep(50 * 1000);
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}
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}
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inline void
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DespotifyInputStream::Callback(int sig)
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{
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switch (sig) {
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case DESPOTIFY_NEW_TRACK:
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break;
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case DESPOTIFY_TIME_TELL:
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break;
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case DESPOTIFY_TRACK_PLAY_ERROR:
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LogWarning(despotify_domain, "Track play error");
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eof = true;
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len_available = 0;
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break;
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case DESPOTIFY_END_OF_PLAYLIST:
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eof = true;
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LogDebug(despotify_domain, "End of playlist");
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break;
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}
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}
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static void callback(gcc_unused struct despotify_session* ds,
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int sig, gcc_unused void* data, void* callback_data)
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{
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DespotifyInputStream *ctx = (DespotifyInputStream *)callback_data;
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ctx->Callback(sig);
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}
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DespotifyInputStream::~DespotifyInputStream()
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{
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mpd_despotify_unregister_callback(callback);
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despotify_free_track(track);
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}
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inline InputStream *
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DespotifyInputStream::Open(const char *url,
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Mutex &mutex, Cond &cond,
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gcc_unused Error &error)
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{
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if (!StringStartsWith(url, "spt://"))
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return nullptr;
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despotify_session *session = mpd_despotify_get_session();
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if (session == nullptr)
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return nullptr;
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ds_link *ds_link = despotify_link_from_uri(url + 6);
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if (!ds_link) {
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FormatDebug(despotify_domain, "Can't find %s", url);
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return nullptr;
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}
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if (ds_link->type != LINK_TYPE_TRACK) {
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despotify_free_link(ds_link);
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return nullptr;
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}
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ds_track *track = despotify_link_get_track(session, ds_link);
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despotify_free_link(ds_link);
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if (!track)
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return nullptr;
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DespotifyInputStream *ctx =
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new DespotifyInputStream(url, mutex, cond,
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session, track);
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if (!mpd_despotify_register_callback(callback, ctx)) {
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delete ctx;
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return nullptr;
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}
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if (despotify_play(ctx->session, ctx->track, false) == false) {
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mpd_despotify_unregister_callback(callback);
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delete ctx;
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return nullptr;
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}
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return ctx;
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}
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static InputStream *
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input_despotify_open(const char *url, Mutex &mutex, Cond &cond, Error &error)
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{
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return DespotifyInputStream::Open(url, mutex, cond, error);
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}
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size_t
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DespotifyInputStream::Read(void *ptr, size_t read_size,
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gcc_unused Error &error)
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{
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if (len_available == 0)
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FillBuffer();
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size_t to_cpy = std::min(read_size, len_available);
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memcpy(ptr, pcm.buf, to_cpy);
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len_available -= to_cpy;
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offset += to_cpy;
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return to_cpy;
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}
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const InputPlugin input_plugin_despotify = {
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"despotify",
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nullptr,
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nullptr,
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input_despotify_open,
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};
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