diff options
Diffstat (limited to '')
| -rw-r--r-- | src/decoder/plugins/WildmidiDecoderPlugin.cxx | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/decoder/plugins/WildmidiDecoderPlugin.cxx b/src/decoder/plugins/WildmidiDecoderPlugin.cxx new file mode 100644 index 000000000..fc58f0977 --- /dev/null +++ b/src/decoder/plugins/WildmidiDecoderPlugin.cxx @@ -0,0 +1,164 @@ +/* + * Copyright (C) 2003-2014 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 "WildmidiDecoderPlugin.hxx" +#include "../DecoderAPI.hxx" +#include "tag/TagHandler.hxx" +#include "util/Error.hxx" +#include "util/Domain.hxx" +#include "fs/AllocatedPath.hxx" +#include "fs/FileSystem.hxx" +#include "fs/Path.hxx" +#include "system/FatalError.hxx" +#include "Log.hxx" + +extern "C" { +#include <wildmidi_lib.h> +} + +static constexpr Domain wildmidi_domain("wildmidi"); + +static constexpr unsigned WILDMIDI_SAMPLE_RATE = 48000; + +static bool +wildmidi_init(const config_param ¶m) +{ + Error error; + const AllocatedPath path = + param.GetBlockPath("config_file", + "/etc/timidity/timidity.cfg", + error); + if (path.IsNull()) + FatalError(error); + + if (!FileExists(path)) { + const auto utf8 = path.ToUTF8(); + FormatDebug(wildmidi_domain, + "configuration file does not exist: %s", + utf8.c_str()); + return false; + } + + return WildMidi_Init(path.c_str(), WILDMIDI_SAMPLE_RATE, 0) == 0; +} + +static void +wildmidi_finish(void) +{ + WildMidi_Shutdown(); +} + +static void +wildmidi_file_decode(Decoder &decoder, Path path_fs) +{ + static constexpr AudioFormat audio_format = { + WILDMIDI_SAMPLE_RATE, + SampleFormat::S16, + 2, + }; + midi *wm; + const struct _WM_Info *info; + + wm = WildMidi_Open(path_fs.c_str()); + if (wm == nullptr) + return; + + info = WildMidi_GetInfo(wm); + if (info == nullptr) { + WildMidi_Close(wm); + return; + } + + const auto duration = + SongTime::FromScale<uint64_t>(info->approx_total_samples, + WILDMIDI_SAMPLE_RATE); + + decoder_initialized(decoder, audio_format, true, duration); + + DecoderCommand cmd; + do { + char buffer[4096]; + int len; + + info = WildMidi_GetInfo(wm); + if (info == nullptr) + break; + + len = WildMidi_GetOutput(wm, buffer, sizeof(buffer)); + if (len <= 0) + break; + + cmd = decoder_data(decoder, nullptr, buffer, len, 0); + + if (cmd == DecoderCommand::SEEK) { + unsigned long seek_where = + decoder_seek_where_frame(decoder); + + WildMidi_FastSeek(wm, &seek_where); + decoder_command_finished(decoder); + cmd = DecoderCommand::NONE; + } + + } while (cmd == DecoderCommand::NONE); + + WildMidi_Close(wm); +} + +static bool +wildmidi_scan_file(Path path_fs, + const struct tag_handler *handler, void *handler_ctx) +{ + midi *wm = WildMidi_Open(path_fs.c_str()); + if (wm == nullptr) + return false; + + const struct _WM_Info *info = WildMidi_GetInfo(wm); + if (info == nullptr) { + WildMidi_Close(wm); + return false; + } + + const auto duration = + SongTime::FromScale<uint64_t>(info->approx_total_samples, + WILDMIDI_SAMPLE_RATE); + tag_handler_invoke_duration(handler, handler_ctx, duration); + + WildMidi_Close(wm); + + return true; +} + +static const char *const wildmidi_suffixes[] = { + "mid", + nullptr +}; + +const struct DecoderPlugin wildmidi_decoder_plugin = { + "wildmidi", + wildmidi_init, + wildmidi_finish, + nullptr, + wildmidi_file_decode, + wildmidi_scan_file, + nullptr, + nullptr, + wildmidi_suffixes, + nullptr, +}; |