169 lines
3.7 KiB
C++
169 lines
3.7 KiB
C++
/*
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* Copyright 2003-2016 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 "WildmidiDecoderPlugin.hxx"
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#include "../DecoderAPI.hxx"
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#include "tag/TagHandler.hxx"
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#include "util/Domain.hxx"
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#include "fs/AllocatedPath.hxx"
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#include "fs/FileSystem.hxx"
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#include "fs/Path.hxx"
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#include "Log.hxx"
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extern "C" {
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#include <wildmidi_lib.h>
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}
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static constexpr Domain wildmidi_domain("wildmidi");
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static constexpr unsigned WILDMIDI_SAMPLE_RATE = 48000;
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static bool
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wildmidi_init(const ConfigBlock &block)
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{
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const AllocatedPath path =
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block.GetPath("config_file",
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"/etc/timidity/timidity.cfg");
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if (!FileExists(path)) {
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const auto utf8 = path.ToUTF8();
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FormatDebug(wildmidi_domain,
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"configuration file does not exist: %s",
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utf8.c_str());
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return false;
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}
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return WildMidi_Init(path.c_str(), WILDMIDI_SAMPLE_RATE, 0) == 0;
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}
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static void
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wildmidi_finish(void)
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{
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WildMidi_Shutdown();
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}
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static DecoderCommand
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wildmidi_output(DecoderClient &client, midi *wm)
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{
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#ifdef LIBWILDMIDI_VER_MAJOR
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/* WildMidi 0.4 has switched from "char*" to "int8_t*" */
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int8_t buffer[4096];
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#else
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/* pre 0.4 */
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char buffer[4096];
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#endif
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int length = WildMidi_GetOutput(wm, buffer, sizeof(buffer));
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if (length <= 0)
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return DecoderCommand::STOP;
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return client.SubmitData(nullptr, buffer, length, 0);
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}
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static void
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wildmidi_file_decode(DecoderClient &client, Path path_fs)
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{
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static constexpr AudioFormat audio_format = {
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WILDMIDI_SAMPLE_RATE,
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SampleFormat::S16,
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2,
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};
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midi *wm;
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const struct _WM_Info *info;
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wm = WildMidi_Open(path_fs.c_str());
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if (wm == nullptr)
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return;
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info = WildMidi_GetInfo(wm);
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if (info == nullptr) {
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WildMidi_Close(wm);
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return;
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}
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const auto duration =
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SongTime::FromScale<uint64_t>(info->approx_total_samples,
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WILDMIDI_SAMPLE_RATE);
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client.Ready(audio_format, true, duration);
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DecoderCommand cmd;
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do {
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info = WildMidi_GetInfo(wm);
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if (info == nullptr)
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break;
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cmd = wildmidi_output(client, wm);
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if (cmd == DecoderCommand::SEEK) {
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unsigned long seek_where = client.GetSeekFrame();
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WildMidi_FastSeek(wm, &seek_where);
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client.CommandFinished();
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cmd = DecoderCommand::NONE;
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}
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} while (cmd == DecoderCommand::NONE);
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WildMidi_Close(wm);
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}
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static bool
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wildmidi_scan_file(Path path_fs,
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const TagHandler &handler, void *handler_ctx)
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{
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midi *wm = WildMidi_Open(path_fs.c_str());
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if (wm == nullptr)
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return false;
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const struct _WM_Info *info = WildMidi_GetInfo(wm);
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if (info == nullptr) {
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WildMidi_Close(wm);
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return false;
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}
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const auto duration =
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SongTime::FromScale<uint64_t>(info->approx_total_samples,
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WILDMIDI_SAMPLE_RATE);
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tag_handler_invoke_duration(handler, handler_ctx, duration);
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WildMidi_Close(wm);
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return true;
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}
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static const char *const wildmidi_suffixes[] = {
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"mid",
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nullptr
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};
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const struct DecoderPlugin wildmidi_decoder_plugin = {
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"wildmidi",
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wildmidi_init,
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wildmidi_finish,
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nullptr,
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wildmidi_file_decode,
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wildmidi_scan_file,
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nullptr,
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nullptr,
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wildmidi_suffixes,
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nullptr,
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};
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