229 lines
6.3 KiB
C++
229 lines
6.3 KiB
C++
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#include "nsid3v2/nsid3v2.h"
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#include "nsid3v2/header.h"
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#include "nsid3v2/tag.h"
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#include "nsid3v2/frame_utils.h"
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#include "nu/AutoWide.h"
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#include <strsafe.h>
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struct ParsedComments
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{
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const char *language;
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uint8_t description_encoding; // 0 - iso-8859-1, 1 - UTF16LE, 2 - UTF16BE, 3 - UTF8
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union
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{
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const char *as8;
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const wchar_t *as16;
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} description_data;
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size_t description_cch;
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uint8_t value_encoding; // 0 - iso-8859-1, 1 - UTF16LE, 2 - UTF16BE, 3 - UTF8
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union
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{
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const char *as8;
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const wchar_t *as16;
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} value_data;
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size_t value_cch;
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};
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static int ParseComments(const void *data, size_t data_len, ParsedComments &parsed)
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{
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int ret;
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if (data_len < 5)
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return NErr_Error;
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const uint8_t *data8 = (const uint8_t *)data;
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switch(data8[0])
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{
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case 0: // ISO-8859-1
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parsed.description_encoding = 0;
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parsed.language = (const char *)&data8[1];
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parsed.value_encoding = 0;
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parsed.description_data.as8 = (const char *)&data8[4];
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data_len-=4;
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ret = ParseDescription(parsed.description_data.as8, data_len, parsed.description_cch);
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if (ret != NErr_Success)
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return ret;
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parsed.value_data.as8 = parsed.description_data.as8 + 2 + parsed.description_cch;
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parsed.value_cch = data_len;
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return NErr_Success;
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case 1: // UTF-16
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parsed.language = (const char *)&data8[1];
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parsed.description_encoding=1;
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parsed.description_data.as16 = (const wchar_t *)&data8[4];
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data_len-=4;
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ret = ParseDescription(parsed.description_data.as16, data_len, parsed.description_cch, parsed.description_encoding);
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if (ret != NErr_Success)
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return ret;
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parsed.value_data.as16 = parsed.description_data.as16 + 2 + parsed.description_cch;
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parsed.value_cch = data_len/2;
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if (parsed.value_cch && parsed.value_data.as16[0] == 0xFFFE)
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{
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parsed.value_encoding=2;
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parsed.value_data.as16++;
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parsed.value_cch--;
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}
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else if (parsed.value_cch && parsed.value_data.as16[0] == 0xFEFF)
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{
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parsed.value_encoding=1;
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parsed.value_data.as16++;
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parsed.value_cch--;
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}
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else
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{
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parsed.value_encoding=1;
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}
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return NErr_Success;
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case 2: // UTF-16 BE
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parsed.language = (const char *)&data8[1];
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parsed.description_encoding=2;
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parsed.description_data.as16 = (const wchar_t *)&data8[4];
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data_len-=3;
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ret = ParseDescription(parsed.description_data.as16, data_len, parsed.description_cch, parsed.description_encoding);
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if (ret != NErr_Success)
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return ret;
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parsed.value_data.as16 = parsed.description_data.as16 + 2 + parsed.description_cch;
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parsed.value_cch = data_len/2;
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parsed.value_encoding=2;
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return NErr_Success;
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case 3: // UTF-8
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parsed.description_encoding = 3;
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parsed.language = (const char *)&data8[1];
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parsed.value_encoding = 3;
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parsed.description_data.as8 = (const char *)&data8[4];
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data_len-=4;
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ret = ParseDescription(parsed.description_data.as8, data_len, parsed.description_cch);
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if (ret != NErr_Success)
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return ret;
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// check for UTF-8 BOM
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if (parsed.description_cch >= 3 && parsed.description_data.as8[0] == 0xEF && parsed.description_data.as8[1] == 0xBB && parsed.description_data.as8[2] == 0xBF)
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{
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parsed.description_data.as8+=3;
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parsed.description_cch-=3;
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}
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if (!data_len)
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return NErr_Error;
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parsed.value_data.as8 = parsed.description_data.as8 + 2 + parsed.description_cch;
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parsed.value_cch = data_len;
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// check for UTF-8 BOM
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if (parsed.value_cch >= 3 && parsed.value_data.as8[0] == 0xEF && parsed.value_data.as8[1] == 0xBB && parsed.value_data.as8[2] == 0xBF)
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{
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parsed.value_data.as8+=3;
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parsed.value_cch-=3;
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}
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return NErr_Success;
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}
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return NErr_NotImplemented;
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}
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int NSID3v2_Tag_Comments_GetUTF16(const nsid3v2_tag_t t, const wchar_t *description, wchar_t *buf, size_t buf_cch, int text_flags)
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{
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const ID3v2::Tag *tag = (const ID3v2::Tag *)t;
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const ID3v2::Frame *frame = tag->FindFirstFrame(NSID3V2_FRAME_COMMENTS);
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while (frame)
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{
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const void *data;
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size_t data_len;
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ParsedComments parsed;
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if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParseComments(data, data_len, parsed) == NErr_Success)
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{
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// see if our description matches
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switch(parsed.description_encoding)
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{
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case 0: // ISO-8859-1
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{
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UINT codepage = (text_flags & NSID3V2_TEXT_SYSTEM)?28591:CP_ACP;
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if (CompareStringW(MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT), NORM_IGNORECASE, AutoWide(parsed.description_data.as8, codepage), -1, description, -1) != CSTR_EQUAL)
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goto next_frame;
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}
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break;
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case 1:
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if (CompareStringW(MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT), NORM_IGNORECASE, parsed.description_data.as16, -1, description, -1) != CSTR_EQUAL)
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goto next_frame;
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break;
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case 2:
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// TODO!
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goto next_frame;
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break;
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case 3:
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if (CompareStringW(MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT), NORM_IGNORECASE, AutoWide(parsed.description_data.as8, CP_UTF8), -1, description, -1) != CSTR_EQUAL)
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goto next_frame;
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break;
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}
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switch(parsed.value_encoding)
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{
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case 0: // ISO-8859-1
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{
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UINT codepage = (text_flags & NSID3V2_TEXT_SYSTEM)?28591:CP_ACP;
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int utf16_len = MultiByteToWideChar(codepage, 0, parsed.value_data.as8, parsed.value_cch, 0, 0);
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if (utf16_len)
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{
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utf16_len = MultiByteToWideChar(codepage, 0, parsed.value_data.as8, parsed.value_cch, buf, utf16_len-1);
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buf[utf16_len]=0;
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}
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else
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{
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buf[0]=0;
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}
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}
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return NErr_Success;
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case 1: // UTF-16
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StringCchCopyNW(buf, buf_cch, parsed.value_data.as16, parsed.value_cch);
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return NErr_Success;
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case 2: // UTF-16BE
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{
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size_t toCopy = buf_cch-1;
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if (parsed.value_cch < toCopy)
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toCopy = parsed.value_cch;
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for (size_t i=0;i<toCopy;i++)
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{
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buf[i] = ((parsed.value_data.as16[i] >> 8) & 0xFF) | (((parsed.value_data.as16[i]) & 0xFF) << 8);
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}
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buf[toCopy]=0;
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}
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return NErr_Success;
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case 3: // UTF-8
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{
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int utf16_len = MultiByteToWideChar(CP_UTF8, 0, parsed.value_data.as8, parsed.value_cch, 0, 0);
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if (utf16_len)
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{
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utf16_len = MultiByteToWideChar(CP_UTF8, 0, parsed.value_data.as8, parsed.value_cch, buf, utf16_len-1);
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buf[utf16_len]=0;
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}
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else
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{
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buf[0]=0;
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}
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}
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return NErr_Success;
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}
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next_frame:
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frame = tag->FindNextFrame(frame);
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}
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}
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return NErr_Error;
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}
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