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TagLib now helps with the tags

This commit is contained in:
Blue 2023-07-25 20:39:56 -03:00
parent 2c913d5f54
commit d6c1cbde1a
Signed by: blue
GPG Key ID: 9B203B252A63EE38
4 changed files with 159 additions and 176 deletions
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3
CHANGELOG.md
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@ -1,5 +1,8 @@
# Changelog
## MLC 1.2.0 (UNRELEASED)
- Better way of handling tags using TagLib
## MLC 1.1.0 (July 23, 2023)
- New logging system
- Artist, Album artist, Album and Title are now utf16 encoded, should fix broten titles

12
CMakeLists.txt
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@ -1,7 +1,7 @@
cmake_minimum_required(VERSION 3.0)
project(
mlc
VERSION 1.0.1
VERSION 1.2.0
DESCRIPTION "Media Library Compiler: rips your media library to a lossy compilation"
LANGUAGES CXX
)
@ -12,10 +12,13 @@ set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
find_package(LAME REQUIRED)
find_package(PkgConfig REQUIRED)
find_package(FLAC REQUIRED)
find_package(JPEG REQUIRED)
pkg_check_modules(LAME REQUIRED IMPORTED_TARGET lame)
pkg_check_modules(TAGLIB REQUIRED IMPORTED_TARGET taglib)
add_executable(mlc
main.cpp
help.cpp
@ -27,9 +30,10 @@ add_executable(mlc
)
target_link_libraries(mlc
${LAME_LIBRARIES}
FLAC
FLAC::FLAC
PkgConfig::LAME
JPEG::JPEG
PkgConfig::TAGLIB
)
install(TARGETS mlc RUNTIME DESTINATION bin)

303
flactomp3.cpp
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@ -2,31 +2,13 @@
#include <cmath>
constexpr uint16_t flacDefaultMaxBlockSize = 4096;
constexpr uint16_t id3v1TagSize = 128;
// constexpr std::wstring_view BOM ({(0xFEFF}); //one day...
#include <tpropertymap.h>
#include <attachedpictureframe.h>
constexpr std::string_view title ("TITLE=");
constexpr std::string_view artist ("ARTIST=");
constexpr std::string_view album ("ALBUM=");
constexpr std::string_view comment ("COMMENT=");
constexpr std::string_view genre ("GENRE=");
constexpr std::string_view track ("TRACKNUMBER=");
constexpr std::string_view date ("DATE=");
constexpr uint16_t flacDefaultMaxBlockSize = 4096;
constexpr std::string_view jpeg ("image/jpeg");
static const std::map<std::string, const std::string> knownTags {
{"ALBUMARTIST=", "TPE2="},
{"PUBLISHER=", "TPUB="},
{"LENGTH=", "TLEN="},
{"ISRC=", "TSRC="},
{"DISCNUMBER=", "TPOS="},
{"BPM=", "TBPM="},
{"LYRICS=", "USLT="} //but it's not supported in LAME
};
FLACtoMP3::FLACtoMP3(Severity severity, uint8_t size) :
Loggable(severity),
inPath(),
@ -44,7 +26,7 @@ FLACtoMP3::FLACtoMP3(Severity severity, uint8_t size) :
outputBufferSize(0),
outputInitilized(false),
downscaleAlbumArt(false),
usc2convertor()
id3v2tag()
{
}
@ -63,30 +45,9 @@ bool FLACtoMP3::run() {
int nwrite = lame_encode_flush(encoder, outputBuffer, pcmSize * 2);
fwrite((char*)outputBuffer, nwrite, 1, output);
if (downscaleAlbumArt) {
fileSize = ftell(output);
lame_mp3_tags_fid(encoder, output);
} else {
int tag1Size = lame_get_id3v1_tag(encoder, outputBuffer, id3v1TagSize);
if (tag1Size > id3v1TagSize)
log(warning, "couldn't write id3v1 tag");
else
fwrite((char*)outputBuffer, tag1Size, 1, output);
fileSize = ftell(output);
fseek(output, 0, SEEK_SET);
int tag2Size = lame_get_id3v2_tag(encoder, outputBuffer, outputBufferSize);
if (tag2Size > outputBufferSize) {
log(Loggable::error, "couldn't write id3v2 tag");
} else
fwrite((char*)outputBuffer, tag2Size, 1, output);
int vbrTagSize = lame_get_lametag_frame(encoder, outputBuffer, outputBufferSize);
if (vbrTagSize > outputBufferSize)
log(Loggable::error, "couldn't write vbr tag");
fwrite((char*)outputBuffer, vbrTagSize, 1, output);
}
fileSize = ftell(output);
lame_mp3_tags_fid(encoder, output);
}
// std::cout << " state: " << FLAC__StreamDecoderStateString[FLAC__stream_decoder_get_state(decoder)] << std::endl;
@ -136,8 +97,6 @@ void FLACtoMP3::setOutputFile(const std::string& path) {
lame_set_VBR(encoder, vbr_default);
lame_set_VBR_quality(encoder, 0);
lame_set_quality(encoder, 0);
if (!downscaleAlbumArt)
lame_set_write_id3tag_automatic(encoder, 0);
}
bool FLACtoMP3::initializeOutput() {
@ -165,14 +124,8 @@ bool FLACtoMP3::initializeOutput() {
pcmSize = lame_get_num_channels(encoder) * flacMaxBlockSize * bufferMultiplier;
outputBufferSize = pcmSize / 2;
if (!downscaleAlbumArt) {
int tag2Size = lame_get_id3v2_tag(encoder, nullptr, 0);
int vbrTagSize = lame_get_lametag_frame(encoder, nullptr, 0);
fseek(output, tag2Size + vbrTagSize, SEEK_SET); //reserve place for tags
if (tag2Size > outputBufferSize)
outputBufferSize = tag2Size;
}
TagLib::ByteVector vector = id3v2tag.render();
fwrite((const char*)vector.data(), vector.size(), 1, output);
pcm = new int16_t[pcmSize];
outputBuffer = new uint8_t[outputBufferSize];
@ -192,47 +145,30 @@ void FLACtoMP3::processInfo(const FLAC__StreamMetadata_StreamInfo& info) {
}
void FLACtoMP3::processTags(const FLAC__StreamMetadata_VorbisComment& tags) {
bool artistSet = false; //in vorbis comment there could be more then 1 artist tag
for (FLAC__uint32 i = 0; i < tags.num_comments; ++i) { //usualy it's about guested and fetured artists
const FLAC__StreamMetadata_VorbisComment_Entry& entry = tags.comments[i]; //gonna keep only the first one for now
TagLib::PropertyMap props;
for (FLAC__uint32 i = 0; i < tags.num_comments; ++i) {
const FLAC__StreamMetadata_VorbisComment_Entry& entry = tags.comments[i];
std::string_view comm((const char*)entry.entry);
if (comm.find(title) == 0) {
setTagTitle(comm.substr(title.size()));
} else if (comm.find(artist) == 0) {
if (!artistSet) {
setTagArtist(comm.substr(artist.size()));
artistSet = true;
} else {
log(minor, "more than one artist tag, ignoring " + std::string(comm.substr(artist.size())));
}
} else if (comm.find(album) == 0) {
setTagAlbum(comm.substr(album.size()));
} else if (comm.find(comment) == 0) {
id3tag_set_comment(encoder, comm.substr(comment.size()).data());
} else if (comm.find(genre) == 0) {
id3tag_set_genre(encoder, comm.substr(genre.size()).data());
} else if (comm.find(track) == 0) {
id3tag_set_track(encoder, comm.substr(track.size()).data());
} else if (comm.find(date) == 0) {
std::string_view fullDate = comm.substr(date.size());
if (fullDate.size() == 10) { //1999-11-11 kind of string
std::string_view month = fullDate.substr(5, std::size_t(2));
std::string_view day = fullDate.substr(8);
std::string md = "TDAT=" + std::string(day) + std::string(month);
int res = id3tag_set_fieldvalue(encoder, md.c_str());
if (res != 0)
log(warning, "wasn't able to set the date tag (" + md + ")");
fullDate = fullDate.substr(0, 4); //year;
}
id3tag_set_year(encoder, std::string(fullDate).data());
} else if (!tryKnownTag(comm)) {
std::string tag = "TXXX=" + std::string(comm);
int res = id3tag_set_fieldvalue(encoder, tag.c_str());
if (res != 0)
log(warning, "wasn't able to set user tag (" + tag + ")");
std::string_view::size_type ePos = comm.find("=");
if (ePos == std::string_view::npos) {
log(warning, "couldn't understand tag (" + std::string(comm) + "), symbol '=' is missing, skipping");
continue;
}
std::string key(comm.substr(0, ePos));
std::string value(comm.substr(ePos + 1));
if (key == "BPM") { //somehow TagLib lets BPM be fractured
std::string::size_type dotPos = value.find("."); //but IDv2.3.0 spec requires it to be integer
if (dotPos != std::string::npos) //I don't know better than just to floor it
value = value.substr(0, dotPos);
}
bool success = props.insert(key, TagLib::String(value, TagLib::String::UTF8));
if (!success)
log(warning, "couldn't understand tag (" + key + "), skipping");
}
id3v2tag.setProperties(props);
}
void FLACtoMP3::processPicture(const FLAC__StreamMetadata_Picture& picture) {
@ -246,9 +182,9 @@ void FLACtoMP3::processPicture(const FLAC__StreamMetadata_Picture& picture) {
log(warning, "failed to rescale album art");
}
} else {
int result = id3tag_set_albumart(encoder, (const char*)picture.data, picture.data_length);
if (result != 0)
log(warning, "couldn't set album art tag, errcode: " + std::to_string(result));
//auch, sorry for copying so much, but I haven't found a way around it yet
TagLib::ByteVector bytes((const char*)picture.data, picture.data_length);
attachPictureFrame(picture, bytes);
}
}
@ -265,8 +201,9 @@ bool FLACtoMP3::scaleJPEG(const FLAC__StreamMetadata_Picture& picture) {
log(Loggable::error, "error reading jpeg header");
return false;
}
TagLib::ByteVector vector (picture.data_length + 1024 * 4); //I allocate a little bit more not to corrupt someone else's the memory
uint64_t mem_size = 0;
uint8_t *mem = new uint8_t[LAME_MAXALBUMART + 1024 * 4]; //I allocate a little bit more not to corrupt someone else's the memory
uint8_t* data = (uint8_t*)vector.data();
dinfo.scale_num = 2; //need to tune it, feels like 500 by 500 is a good size
dinfo.scale_denom = 3;
@ -276,7 +213,7 @@ bool FLACtoMP3::scaleJPEG(const FLAC__StreamMetadata_Picture& picture) {
struct jpeg_error_mgr cerr;
cinfo.err = jpeg_std_error(&cerr);
jpeg_create_compress(&cinfo);
jpeg_mem_dest(&cinfo, &mem, &mem_size);
jpeg_mem_dest(&cinfo, &data, &mem_size);
cinfo.image_width = dinfo.output_width;
cinfo.image_height = dinfo.output_height;
@ -290,14 +227,12 @@ bool FLACtoMP3::scaleJPEG(const FLAC__StreamMetadata_Picture& picture) {
uint8_t* row = new uint8_t[rowSize];
while (dinfo.output_scanline < dinfo.output_height) {
if (mem_size + rowSize > vector.size()) {
vector.resize(vector.size() + rowSize);
log(Loggable::major, "allocated memory for resising the image wasn't enougth, resising");
}
jpeg_read_scanlines(&dinfo, &row, 1);
jpeg_write_scanlines(&cinfo, &row, 1);
if (mem_size > LAME_MAXALBUMART) {
delete[] mem;
log(Loggable::error, "resized album art exceeded reserved buffer size, stopping before memory corrution");
return false;
}
}
jpeg_finish_decompress(&dinfo);
jpeg_destroy_decompress(&dinfo);
@ -307,42 +242,12 @@ bool FLACtoMP3::scaleJPEG(const FLAC__StreamMetadata_Picture& picture) {
delete[] row;
int result = id3tag_set_albumart(encoder, (const char*)mem, mem_size);
delete[] mem;
vector.resize(mem_size); //to shrink if down to the actual size
attachPictureFrame(picture, vector);
return result == 0;
return true;
}
bool FLACtoMP3::tryKnownTag(std::string_view source) {
for (const std::pair<const std::string, const std::string>& pair : knownTags) {
if (source.find(pair.first) == 0) {
if (pair.first == "LYRICS=") {
log(warning, "lyrics tag was not transfered, it is not supported currently");
} else if (pair.first == "BPM=") {
float bpm = std::atof(source.substr(pair.first.size()).data());
bpm = std::round(bpm); //id3 bpm must be integer
int result = id3tag_set_fieldvalue(encoder, std::string(pair.second + std::to_string((int)bpm)).c_str());
if (result != 0)
log(warning, "wasn't able to set BPM tag. Code = " + std::to_string(result));
} else if (pair.first == "ALBUMARTIST=") {
int res = setTagUSC2("TPE2", source.substr(pair.first.size()));
if (res != 0)
log(warning, "wasn't able to album artist tag. Code = " + std::to_string(res));
} else {
std::string tag = pair.second + std::string(source.substr(pair.first.size()));
int res = id3tag_set_fieldvalue(encoder, tag.c_str());
if (res != 0)
log(warning, "wasn't able to set tag (" + std::string(source) + "). Code = " + std::to_string(res));
}
return true;
}
}
return false;
}
bool FLACtoMP3::decodeFrame(const int32_t * const buffer[], uint32_t size) {
if (!outputInitilized) {
bool success = initializeOutput();
@ -459,28 +364,106 @@ void FLACtoMP3::error(const FLAC__StreamDecoder* decoder, FLAC__StreamDecoderErr
self->log(Loggable::error, "Got error callback: " + errText);
}
void FLACtoMP3::setTagTitle(const std::string_view& title) {
id3tag_set_title(encoder, title.data()); //to set at least some possibly encoding broken id3v1 tag
int res = setTagUSC2("TIT2", title);
if (res != 0)
log(warning, "Couldn't set Title tag. Code = " + std::to_string(res));
void FLACtoMP3::attachPictureFrame(const FLAC__StreamMetadata_Picture& picture, const TagLib::ByteVector& bytes) {
TagLib::ID3v2::AttachedPictureFrame* frame = new TagLib::ID3v2::AttachedPictureFrame();
frame->setPicture(bytes);
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Media);
frame->setMimeType(picture.mime_type);
frame->setDescription(TagLib::String((const char*)picture.description, TagLib::String::UTF8));
switch (picture.type) {
case FLAC__STREAM_METADATA_PICTURE_TYPE_OTHER:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Other);
log(info, "attached picture is described as \"other\"");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::FileIcon);
log(info, "attached picture is a standard file icon");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::OtherFileIcon);
log(info, "attached picture is apparently not so standard file icon...");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_FRONT_COVER:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::FrontCover);
log(info, "attached picture is a front album cover");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_BACK_COVER:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::BackCover);
log(info, "attached picture is an back album cover");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_LEAFLET_PAGE:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::LeafletPage);
log(info, "attached picture is a leflet from the album");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_MEDIA:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Media);
log(info, "attached picture is probably an imadge of an album CD");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_LEAD_ARTIST:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::LeadArtist);
log(info, "attached picture is an image of the lead artist");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_ARTIST:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Artist);
log(info, "attached picture is an image the artist");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_CONDUCTOR:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Conductor);
log(info, "attached picture is an image the conductor");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_BAND:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Band);
log(info, "attached picture is an image of the band");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_COMPOSER:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Composer);
log(info, "attached picture is an image of composer");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_LYRICIST:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Lyricist);
log(info, "attached picture is an image of the lyricist");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_RECORDING_LOCATION:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::RecordingLocation);
log(info, "attached picture is an image recording location");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_DURING_RECORDING:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::DuringRecording);
log(info, "attached picture is an image of the process of the recording");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_DURING_PERFORMANCE:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::DuringPerformance);
log(info, "attached picture is an image of process of the performance");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_VIDEO_SCREEN_CAPTURE:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::MovieScreenCapture);
log(info, "attached picture is an frame from a movie");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_FISH:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::ColouredFish);
log(info, "attached picture is ... a bright large colo(u?)red fish...? o_O");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_ILLUSTRATION:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Illustration);
log(info, "attached picture is an track related illustration");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_BAND_LOGOTYPE:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::BandLogo);
log(info, "attached picture is a band logo");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_PUBLISHER_LOGOTYPE:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::PublisherLogo);
log(info, "attached picture is a publisher logo");
break;
case FLAC__STREAM_METADATA_PICTURE_TYPE_UNDEFINED:
frame->setType(TagLib::ID3v2::AttachedPictureFrame::Other);
log(info, "attached picture is something unknown, so, I would assume it's \"other\"");
break;
}
log(info, "attached picture size: " + std::to_string(frame->picture().size()));
std::string description = frame->description().to8Bit();
if (description.size() > 0)
log(info, "attached picture has a description (b'cuz where else would you ever read it?): " + description);
id3v2tag.addFrame(frame);
}
void FLACtoMP3::setTagAlbum(const std::string_view& album) {
id3tag_set_album(encoder, album.data()); //to set at least some possibly encoding broken id3v1 tag
int res = setTagUSC2("TALB", album);
if (res != 0)
log(warning, "Couldn't set Album tag. Code = " + std::to_string(res));
}
void FLACtoMP3::setTagArtist(const std::string_view& artist) {
id3tag_set_artist(encoder, artist.data()); //to set at least some possibly encoding broken id3v1 tag
int res = setTagUSC2("TPE1", artist);
if (res != 0)
log(warning, "Couldn't set Artist tag. Code = " + std::to_string(res));
}
int FLACtoMP3::setTagUSC2(const std::string_view& field, const std::string_view& value) {
std::u16string utf16 = std::u16string({0xFEFF}) + usc2convertor.from_bytes(value.data());
return id3tag_set_textinfo_utf16(encoder, field.data(), (unsigned short*)utf16.c_str());
}

17
flactomp3.h
View File

@ -1,13 +1,12 @@
#pragma once
#include "FLAC/stream_decoder.h"
#include <lame/lame.h>
#include <FLAC/stream_decoder.h>
#include <lame.h>
#include <jpeglib.h>
#include <id3v2tag.h>
#include <string>
#include <string_view>
#include <codecvt>
#include <locale>
#include <map>
#include <stdio.h>
@ -29,14 +28,8 @@ private:
bool decodeFrame(const int32_t * const buffer[], uint32_t size);
bool flush();
bool initializeOutput();
bool tryKnownTag(std::string_view source);
bool scaleJPEG(const FLAC__StreamMetadata_Picture& picture);
void setTagTitle(const std::string_view& title);
void setTagAlbum(const std::string_view& album);
void setTagArtist(const std::string_view& artist);
int setTagUSC2(const std::string_view& field, const std::string_view& value);
void attachPictureFrame(const FLAC__StreamMetadata_Picture& picture, const TagLib::ByteVector& bytes);
static void error(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
static void metadata(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
@ -65,5 +58,5 @@ private:
uint32_t outputBufferSize;
bool outputInitilized;
bool downscaleAlbumArt;
std::wstring_convert<std::codecvt_utf8<char16_t>, char16_t> usc2convertor;
TagLib::ID3v2::Tag id3v2tag;
};