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#include "nsid3v2.h"
#include "nsid3v2/header.h"
#include "nsid3v2/tag.h"
#include "nsid3v2/frame_utils.h"
#include "nu/ByteReader.h"
#include "nu/ByteWriter.h"
#include "nx/nxstring.h"
struct ParsedUserText
{
ParsedString description;
ParsedString value;
};
static int ParseUserText(const void *data, size_t data_len, ParsedUserText &parsed)
{
int ret;
if (data_len == 0)
return NErr_Insufficient;
bytereader_value_t byte_reader;
bytereader_init(&byte_reader, data, data_len);
uint8_t encoding = bytereader_read_u8(&byte_reader);
ret = ParseNullTerminatedString(&byte_reader, encoding, parsed.description);
if (ret != NErr_Success)
return ret;
return ParseFrameTerminatedString(&byte_reader, encoding, parsed.value);
}
int NSID3v2_Tag_TXXX_Find(const nsid3v2_tag_t t, const char *description, nsid3v2_frame_t *out_frame, int text_flags)
{
const ID3v2::Tag *tag = (const ID3v2::Tag *)t;
if (!tag)
return NErr_Empty;
const ID3v2::Frame *frame = tag->FindFirstFrame(NSID3V2_FRAME_USER_TEXT);
while (frame)
{
const void *data;
size_t data_len;
ParsedUserText parsed;
if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParseUserText(data, data_len, parsed) == NErr_Success && DescriptionMatches(parsed.description, description, text_flags))
{
*out_frame = (nsid3v2_frame_t)frame;
return NErr_Success;
}
frame = tag->FindNextFrame(frame);
}
return NErr_Empty;
}
int NSID3v2_Tag_TXXX_Get(const nsid3v2_tag_t t, const char *description, nx_string_t *value, int text_flags)
{
const ID3v2::Tag *tag = (const ID3v2::Tag *)t;
if (!tag)
return NErr_Empty;
const ID3v2::Frame *frame = tag->FindFirstFrame(NSID3V2_FRAME_USER_TEXT);
while (frame)
{
const void *data;
size_t data_len;
ParsedUserText parsed;
if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParseUserText(data, data_len, parsed) == NErr_Success && DescriptionMatches(parsed.description, description, text_flags))
{
return NXStringCreateFromParsedString(value, parsed.value, text_flags);
}
frame = tag->FindNextFrame(frame);
}
return NErr_Empty;
}
int NSID3v2_Frame_UserText_Get(const nsid3v2_frame_t f, nx_string_t *description, nx_string_t *value, int text_flags)
{
const ID3v2::Frame *frame = (const ID3v2::Frame *)f;
if (frame)
{
const void *data;
size_t data_len;
ParsedUserText parsed;
if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParseUserText(data, data_len, parsed) == NErr_Success)
{
int ret = NXStringCreateFromParsedString(value, parsed.value, text_flags);
if (ret != NErr_Success)
return ret;
if (description)
return NXStringCreateFromParsedString(description, parsed.description, text_flags);
else
return NErr_Success;
}
}
return NErr_Error;
}
/* ---------------- Setters ---------------- */
int NSID3v2_Frame_UserText_Set(nsid3v2_frame_t f, const char *description, nx_string_t value, int text_flags)
{
ID3v2::Frame *frame = (ID3v2::Frame *)f;
if (frame)
{
/* benski> for now, we're going to store UTF-16LE always. in the future, we'll add functions to NXString to determine a 'best' encoding */
size_t description_length=strlen(description);
size_t byte_count_value=0;
int ret = NXStringGetBytesSize(&byte_count_value, value, nx_charset_utf16le, 0);
if (ret != NErr_DirectPointer && ret != NErr_Success)
return ret;
/* TODO: overflow check */
size_t total_size = 1 /* encoding */ + 2 /* BOM for description */ + description_length*2 + 2 /* null separator */ + 2 /* BOM for value */ + byte_count_value;
void *data;
size_t data_len;
ret = frame->NewData(total_size, &data, &data_len);
if (ret != NErr_Success)
return ret;
size_t bytes_copied;
bytewriter_s byte_writer;
bytewriter_init(&byte_writer, data, data_len);
bytewriter_write_u8(&byte_writer, 1); /* mark as UTF-16LE */
bytewriter_write_u16_le(&byte_writer, 0xFEFF); /* BOM for description */
for (size_t i=0;i<description_length;i++)
bytewriter_write_u16_le(&byte_writer, description[i]);
bytewriter_write_u16_le(&byte_writer, 0); /* NULL separator*/
bytewriter_write_u16_le(&byte_writer, 0xFEFF); /* BOM for value */
NXStringGetBytes(&bytes_copied, value, bytewriter_pointer(&byte_writer), bytewriter_size(&byte_writer), nx_charset_utf16le, 0);
return NErr_Success;
}
return NErr_Error;
}
int NSID3v2_Tag_TXXX_Set(nsid3v2_tag_t t, const char *description, nx_string_t value, int text_flags)
{
ID3v2::Tag *tag = (ID3v2::Tag *)t;
if (!tag)
return NErr_Empty;
ID3v2::Frame *frame = tag->FindFirstFrame(NSID3V2_FRAME_USER_TEXT);
while (frame)
{
const void *data;
size_t data_len;
ParsedUserText parsed;
if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParseUserText(data, data_len, parsed) == NErr_Success && DescriptionMatches(parsed.description, description, text_flags))
{
break;
}
frame = tag->FindNextFrame(frame);
}
if (!frame)
{
frame = tag->NewFrame(NSID3V2_FRAME_USER_TEXT, 0);
if (!frame)
return NErr_OutOfMemory;
tag->AddFrame(frame);
}
return NSID3v2_Frame_UserText_Set((nsid3v2_frame_t)frame, description, value, text_flags);
}
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