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/*
* Copyright 2003-2021 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 "ModplugDecoderPlugin.hxx"
#include "../DecoderAPI.hxx"
#include "input/InputStream.hxx"
#include "tag/Handler.hxx"
#include "util/WritableBuffer.hxx"
#include "util/Domain.hxx"
#include "util/RuntimeError.hxx"
#include "util/StringView.hxx"
#include "Log.hxx"
#ifdef _WIN32
/* assume ModPlug is built as static library on Windows; without
this, linking to the static library would fail */
#define MODPLUG_STATIC
#endif
#include <libmodplug/modplug.h>
#include <cassert>
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 offset_type MODPLUG_FILE_LIMIT = 100 * 1024 * 1024;
static int modplug_loop_count;
static unsigned char modplug_resampling_mode;
static bool
modplug_decoder_init(const ConfigBlock &block)
{
const char* modplug_resampling_mode_value = block.GetBlockValue("resampling_mode", "fir");
if (strcmp(modplug_resampling_mode_value, "nearest") == 0) {
modplug_resampling_mode = MODPLUG_RESAMPLE_NEAREST;
} else if (strcmp(modplug_resampling_mode_value, "linear") == 0) {
modplug_resampling_mode = MODPLUG_RESAMPLE_LINEAR;
} else if (strcmp(modplug_resampling_mode_value, "spline") == 0) {
modplug_resampling_mode = MODPLUG_RESAMPLE_SPLINE;
} else if (strcmp(modplug_resampling_mode_value, "fir") == 0) {
modplug_resampling_mode = MODPLUG_RESAMPLE_FIR;
} else {
throw FormatRuntimeError("Invalid resampling mode in line %d: %s",
block.line, modplug_resampling_mode_value);
}
modplug_loop_count = block.GetBlockValue("loop_count", 0);
if (modplug_loop_count < -1)
throw FormatRuntimeError("Invalid loop count in line %d: %i",
block.line, modplug_loop_count);
return true;
}
static WritableBuffer<uint8_t>
mod_loadfile(DecoderClient *client, InputStream &is)
{
//known/unknown size, preallocate array, lets read in chunks
const bool is_stream = !is.KnownSize();
WritableBuffer<uint8_t> buffer;
if (is_stream)
buffer.size = MODPLUG_PREALLOC_BLOCK;
else {
const auto size = is.GetSize();
if (size == 0) {
LogWarning(modplug_domain, "file is empty");
return nullptr;
}
if (size > MODPLUG_FILE_LIMIT) {
LogWarning(modplug_domain, "file too large");
return nullptr;
}
buffer.size = 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(client, 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(DecoderClient *client, InputStream &is)
{
const auto buffer = mod_loadfile(client, 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(DecoderClient &client, InputStream &is)
{
ModPlug_Settings settings;
int ret;
char audio_buffer[MODPLUG_FRAME_SIZE];
ModPlug_GetSettings(&settings);
/* alter setting */
settings.mResamplingMode = modplug_resampling_mode;
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(&client, 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());
client.Ready(audio_format, is.IsSeekable(),
SongTime::FromMS(ModPlug_GetLength(f)));
DecoderCommand cmd;
do {
ret = ModPlug_Read(f, audio_buffer, MODPLUG_FRAME_SIZE);
if (ret <= 0)
break;
cmd = client.SubmitData(nullptr,
audio_buffer, ret,
0);
if (cmd == DecoderCommand::SEEK) {
ModPlug_Seek(f, client.GetSeekTime().ToMS());
client.CommandFinished();
}
} while (cmd != DecoderCommand::STOP);
ModPlug_Unload(f);
}
static bool
modplug_scan_stream(InputStream &is, TagHandler &handler) noexcept
{
ModPlugFile *f = LoadModPlugFile(nullptr, is);
if (f == nullptr)
return false;
handler.OnDuration(SongTime::FromMS(ModPlug_GetLength(f)));
const char *title = ModPlug_GetName(f);
if (title != nullptr)
handler.OnTag(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
};
constexpr DecoderPlugin modplug_decoder_plugin =
DecoderPlugin("modplug", mod_decode, modplug_scan_stream)
.WithInit(modplug_decoder_init)
.WithSuffixes(mod_suffixes);
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