Initial community commit

1 files changed, 228 insertions, 0 deletions

diff --git a/Src/replicant/nsid3v2/windows/frame_comments.cpp b/Src/replicant/nsid3v2/windows/frame_comments.cpp
new file mode 100644
index 00000000..4e1beb5f
--- /dev/null
+++ b/Src/replicant/nsid3v2/windows/frame_comments.cpp
@@ -0,0 +1,228 @@
+#include "nsid3v2/nsid3v2.h"
+#include "nsid3v2/header.h"
+#include "nsid3v2/tag.h"
+#include "nsid3v2/frame_utils.h"
+#include "nu/AutoWide.h"
+#include <strsafe.h>
+
+struct ParsedComments
+{
+	const char *language;
+	uint8_t description_encoding; // 0 - iso-8859-1, 1 - UTF16LE, 2 - UTF16BE, 3 - UTF8
+	union 
+	{
+		const char *as8;
+		const wchar_t *as16;
+	} description_data;
+	size_t description_cch;
+	uint8_t value_encoding; // 0 - iso-8859-1, 1 - UTF16LE, 2 - UTF16BE, 3 - UTF8
+	union 
+	{
+		const char *as8;
+		const wchar_t *as16;
+	} value_data;
+	size_t value_cch;
+};
+
+static int ParseComments(const void *data, size_t data_len, ParsedComments &parsed)
+{
+	int ret;
+	if (data_len < 5)
+		return NErr_Error;
+
+	const uint8_t *data8 = (const uint8_t *)data;
+	switch(data8[0])
+	{
+	case 0: // ISO-8859-1
+		parsed.description_encoding = 0;
+		parsed.language = (const char *)&data8[1];
+		
+		parsed.value_encoding = 0;
+		parsed.description_data.as8 = (const char *)&data8[4];
+		data_len-=4;
+
+		ret = ParseDescription(parsed.description_data.as8, data_len, parsed.description_cch);
+		if (ret != NErr_Success)
+			return ret;
+
+		parsed.value_data.as8 = parsed.description_data.as8 + 2 + parsed.description_cch;
+		parsed.value_cch = data_len;
+
+		return NErr_Success;
+	case 1: // UTF-16
+		parsed.language = (const char *)&data8[1];
+		parsed.description_encoding=1;
+		parsed.description_data.as16 = (const wchar_t *)&data8[4];
+		data_len-=4;
+
+		ret = ParseDescription(parsed.description_data.as16, data_len, parsed.description_cch, parsed.description_encoding);
+		if (ret != NErr_Success)
+			return ret;
+
+		parsed.value_data.as16 = parsed.description_data.as16 + 2 + parsed.description_cch;
+		parsed.value_cch = data_len/2;
+
+		if (parsed.value_cch && parsed.value_data.as16[0] == 0xFFFE)
+		{
+			parsed.value_encoding=2;
+			parsed.value_data.as16++;
+			parsed.value_cch--;
+		}
+		else if (parsed.value_cch && parsed.value_data.as16[0] == 0xFEFF)
+		{
+			parsed.value_encoding=1;
+			parsed.value_data.as16++;
+			parsed.value_cch--;
+		}
+		else
+		{
+			parsed.value_encoding=1;
+		}
+
+		return NErr_Success;
+
+	case 2: // UTF-16 BE
+		parsed.language = (const char *)&data8[1];
+		parsed.description_encoding=2;
+		parsed.description_data.as16 = (const wchar_t *)&data8[4];
+		data_len-=3;
+
+		ret = ParseDescription(parsed.description_data.as16, data_len, parsed.description_cch, parsed.description_encoding);
+		if (ret != NErr_Success)
+			return ret;
+
+		parsed.value_data.as16 = parsed.description_data.as16 + 2 + parsed.description_cch;
+		parsed.value_cch = data_len/2;
+		parsed.value_encoding=2;
+
+		return NErr_Success;
+	case 3: // UTF-8
+		parsed.description_encoding = 3;
+		parsed.language = (const char *)&data8[1];
+		parsed.value_encoding = 3;
+		parsed.description_data.as8 = (const char *)&data8[4];
+		data_len-=4;
+
+		ret = ParseDescription(parsed.description_data.as8, data_len, parsed.description_cch);
+		if (ret != NErr_Success)
+			return ret;
+
+		// check for UTF-8 BOM
+		if (parsed.description_cch >= 3 && parsed.description_data.as8[0] == 0xEF && parsed.description_data.as8[1] == 0xBB && parsed.description_data.as8[2] == 0xBF)
+		{
+			parsed.description_data.as8+=3;
+			parsed.description_cch-=3;
+		}
+
+		if (!data_len)
+			return NErr_Error;
+
+		parsed.value_data.as8 = parsed.description_data.as8 + 2 + parsed.description_cch;
+		parsed.value_cch = data_len;
+
+		// check for UTF-8 BOM
+		if (parsed.value_cch >= 3 && parsed.value_data.as8[0] == 0xEF && parsed.value_data.as8[1] == 0xBB && parsed.value_data.as8[2] == 0xBF)
+		{
+			parsed.value_data.as8+=3;
+			parsed.value_cch-=3;
+		}
+
+		return NErr_Success;
+	}
+	return NErr_NotImplemented;
+}
+
+
+int NSID3v2_Tag_Comments_GetUTF16(const nsid3v2_tag_t t, const wchar_t *description, wchar_t *buf, size_t buf_cch, int text_flags)
+{
+	const ID3v2::Tag *tag = (const ID3v2::Tag *)t;
+	const ID3v2::Frame *frame = tag->FindFirstFrame(NSID3V2_FRAME_COMMENTS);
+	while (frame)
+	{
+		const void *data;
+		size_t data_len;
+		ParsedComments parsed;
+		if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParseComments(data, data_len, parsed) == NErr_Success)
+		{
+			// see if our description matches
+			switch(parsed.description_encoding)
+			{
+			case 0:  // ISO-8859-1
+				{
+					UINT codepage = (text_flags & NSID3V2_TEXT_SYSTEM)?28591:CP_ACP;
+					if (CompareStringW(MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT), NORM_IGNORECASE, AutoWide(parsed.description_data.as8, codepage), -1, description, -1) != CSTR_EQUAL)
+						goto next_frame;
+				}
+				break;
+			case 1:
+				if (CompareStringW(MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT), NORM_IGNORECASE, parsed.description_data.as16, -1, description, -1) != CSTR_EQUAL)
+					goto next_frame;
+				break;
+			case 2:
+				// TODO!
+				goto next_frame;
+				break;
+			case 3:		
+				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)
+					goto next_frame;
+				break;
+			}
+
+			switch(parsed.value_encoding)
+			{
+			case 0: // ISO-8859-1
+				{
+					UINT codepage = (text_flags & NSID3V2_TEXT_SYSTEM)?28591:CP_ACP;
+					int utf16_len = MultiByteToWideChar(codepage, 0, parsed.value_data.as8, parsed.value_cch, 0, 0);
+
+					if (utf16_len)
+					{
+						utf16_len = MultiByteToWideChar(codepage, 0, parsed.value_data.as8, parsed.value_cch, buf, utf16_len-1);
+						buf[utf16_len]=0;
+					}
+					else
+					{
+						buf[0]=0;
+					}
+				}
+				return NErr_Success;
+			case 1: // UTF-16
+				StringCchCopyNW(buf, buf_cch, parsed.value_data.as16, parsed.value_cch);
+				return NErr_Success;
+			case 2: // UTF-16BE
+				{
+					size_t toCopy = buf_cch-1;
+					if (parsed.value_cch < toCopy)
+						toCopy = parsed.value_cch;
+					for (size_t i=0;i<toCopy;i++)
+					{
+						buf[i] = ((parsed.value_data.as16[i] >> 8) & 0xFF) | (((parsed.value_data.as16[i]) & 0xFF) << 8);
+					}
+					buf[toCopy]=0;
+				}
+				return NErr_Success;
+			case 3: // UTF-8
+				{
+					int utf16_len = MultiByteToWideChar(CP_UTF8, 0, parsed.value_data.as8, parsed.value_cch, 0, 0);
+
+					if (utf16_len)
+					{
+						utf16_len = MultiByteToWideChar(CP_UTF8, 0, parsed.value_data.as8, parsed.value_cch, buf, utf16_len-1);
+						buf[utf16_len]=0;
+					}
+					else
+					{
+						buf[0]=0;
+					}
+				}
+				return NErr_Success;
+			}
+
+next_frame:
+			frame = tag->FindNextFrame(frame);
+		}
+	}
+
+	return NErr_Error;
+}
+