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Diffstat (limited to 'src/decoder/plugins/ModplugDecoderPlugin.cxx')
| -rw-r--r-- | src/decoder/plugins/ModplugDecoderPlugin.cxx | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/src/decoder/plugins/ModplugDecoderPlugin.cxx b/src/decoder/plugins/ModplugDecoderPlugin.cxx new file mode 100644 index 000000000..336870817 --- /dev/null +++ b/src/decoder/plugins/ModplugDecoderPlugin.cxx @@ -0,0 +1,215 @@ +/* + * 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 "ModplugDecoderPlugin.hxx" +#include "../DecoderAPI.hxx" +#include "input/InputStream.hxx" +#include "tag/TagHandler.hxx" +#include "system/FatalError.hxx" +#include "util/WritableBuffer.hxx" +#include "util/Domain.hxx" +#include "Log.hxx" + +#include <libmodplug/modplug.h> + + +#include <assert.h> + +static constexpr Domain modplug_domain("modplug"); + +static constexpr size_t MODPLUG_FRAME_SIZE = 4096; +static constexpr size_t MODPLUG_PREALLOC_BLOCK = 256 * 1024; +static constexpr InputStream::offset_type MODPLUG_FILE_LIMIT = 100 * 1024 * 1024; + +static int modplug_loop_count; + +static bool +modplug_decoder_init(const config_param ¶m) +{ + modplug_loop_count = param.GetBlockValue("loop_count", 0); + if (modplug_loop_count < -1) + FormatFatalError("Invalid loop count in line %d: %i", + param.line, modplug_loop_count); + + return true; +} + +static WritableBuffer<uint8_t> +mod_loadfile(Decoder *decoder, InputStream &is) +{ + const InputStream::offset_type size = is.GetSize(); + + if (size == 0) { + LogWarning(modplug_domain, "file is empty"); + return { nullptr, 0 }; + } + + if (size > MODPLUG_FILE_LIMIT) { + LogWarning(modplug_domain, "file too large"); + return { nullptr, 0 }; + } + + //known/unknown size, preallocate array, lets read in chunks + + const bool is_stream = size < 0; + + WritableBuffer<uint8_t> buffer; + buffer.size = is_stream ? MODPLUG_PREALLOC_BLOCK : size; + buffer.data = new uint8_t[buffer.size]; + + uint8_t *const end = buffer.end(); + uint8_t *p = buffer.begin(); + + while (true) { + size_t ret = decoder_read(decoder, is, p, end - p); + if (ret == 0) { + if (is.LockIsEOF()) + /* end of file */ + break; + + /* I/O error - skip this song */ + delete[] buffer.data; + buffer.data = nullptr; + return buffer; + } + + p += ret; + if (p == end) { + if (!is_stream) + break; + + LogWarning(modplug_domain, "stream too large"); + delete[] buffer.data; + buffer.data = nullptr; + return buffer; + } + } + + buffer.size = p - buffer.data; + return buffer; +} + +static ModPlugFile * +LoadModPlugFile(Decoder *decoder, InputStream &is) +{ + const auto buffer = mod_loadfile(decoder, is); + if (buffer.IsNull()) { + LogWarning(modplug_domain, "could not load stream"); + return nullptr; + } + + ModPlugFile *f = ModPlug_Load(buffer.data, buffer.size); + delete[] buffer.data; + return f; +} + +static void +mod_decode(Decoder &decoder, InputStream &is) +{ + ModPlug_Settings settings; + int ret; + char audio_buffer[MODPLUG_FRAME_SIZE]; + + ModPlug_GetSettings(&settings); + /* alter setting */ + settings.mResamplingMode = MODPLUG_RESAMPLE_FIR; /* RESAMP */ + settings.mChannels = 2; + settings.mBits = 16; + settings.mFrequency = 44100; + settings.mLoopCount = modplug_loop_count; + /* insert more setting changes here */ + ModPlug_SetSettings(&settings); + + ModPlugFile *f = LoadModPlugFile(&decoder, is); + if (f == nullptr) { + LogWarning(modplug_domain, "could not decode stream"); + return; + } + + static constexpr AudioFormat audio_format(44100, SampleFormat::S16, 2); + assert(audio_format.IsValid()); + + decoder_initialized(decoder, audio_format, + is.IsSeekable(), + ModPlug_GetLength(f) / 1000.0); + + DecoderCommand cmd; + do { + ret = ModPlug_Read(f, audio_buffer, MODPLUG_FRAME_SIZE); + if (ret <= 0) + break; + + cmd = decoder_data(decoder, nullptr, + audio_buffer, ret, + 0); + + if (cmd == DecoderCommand::SEEK) { + float where = decoder_seek_where(decoder); + + ModPlug_Seek(f, (int)(where * 1000.0)); + + decoder_command_finished(decoder); + } + + } while (cmd != DecoderCommand::STOP); + + ModPlug_Unload(f); +} + +static bool +modplug_scan_stream(InputStream &is, + const struct tag_handler *handler, void *handler_ctx) +{ + ModPlugFile *f = LoadModPlugFile(nullptr, is); + if (f == nullptr) + return false; + + tag_handler_invoke_duration(handler, handler_ctx, + ModPlug_GetLength(f) / 1000); + + const char *title = ModPlug_GetName(f); + if (title != nullptr) + tag_handler_invoke_tag(handler, handler_ctx, + TAG_TITLE, title); + + ModPlug_Unload(f); + + return true; +} + +static const char *const mod_suffixes[] = { + "669", "amf", "ams", "dbm", "dfm", "dsm", "far", "it", + "med", "mdl", "mod", "mtm", "mt2", "okt", "s3m", "stm", + "ult", "umx", "xm", + nullptr +}; + +const struct DecoderPlugin modplug_decoder_plugin = { + "modplug", + modplug_decoder_init, + nullptr, + mod_decode, + nullptr, + nullptr, + modplug_scan_stream, + nullptr, + mod_suffixes, + nullptr, +}; |