Initial community commit

1 files changed, 185 insertions, 0 deletions

diff --git a/Src/replicant/nsid3v2/frame_comments.cpp b/Src/replicant/nsid3v2/frame_comments.cpp
new file mode 100644
index 00000000..d6e5b331
--- /dev/null
+++ b/Src/replicant/nsid3v2/frame_comments.cpp
@@ -0,0 +1,185 @@
+#include "nsid3v2.h"
+#include "nsid3v2/header.h"
+#include "nsid3v2/tag.h"
+#include "nsid3v2/frame_utils.h"
+#include "nu/AutoWide.h"
+#include "nx/nxstring.h"
+#include "nu/ByteWriter.h"
+
+struct ParsedComments
+{
+	char language[3];
+	ParsedString description;
+	ParsedString value;
+};
+
+static int ParseComments(const void *data, size_t data_len, ParsedComments &parsed)
+{
+	int ret;
+	if (data_len < 5)
+		return NErr_Insufficient;
+	
+	bytereader_value_t byte_reader;
+	bytereader_init(&byte_reader, data, data_len);
+	
+	// Get encoding
+	uint8_t encoding = bytereader_read_u8(&byte_reader);
+	// Get language
+	for (int i = 0; i < 3; i++)
+		parsed.language[i] = bytereader_read_u8(&byte_reader);
+
+	// Get description
+	ret = ParseNullTerminatedString(&byte_reader, encoding, parsed.description);
+	if (ret != NErr_Success)
+		return ret;
+	// Get actual text value
+	ret = ParseFrameTerminatedString(&byte_reader, encoding, parsed.value);
+
+	return ret;
+}
+
+int NSID3v2_Tag_Comments_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_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 && (!description || 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_Comments_Get(const nsid3v2_tag_t t, const char *description, char language[3], 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_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 && (!description || DescriptionMatches(parsed.description, description, text_flags)))
+		{
+			if (language)
+				memcpy(language, parsed.language, 3);
+			return NXStringCreateFromParsedString(value, parsed.value, text_flags);
+		}
+
+		frame = tag->FindNextFrame(frame);
+	}
+
+	return NErr_Empty;
+}
+
+int NSID3v2_Frame_Comments_Get(const nsid3v2_frame_t f, nx_string_t *description, char language[3], nx_string_t *value, int text_flags)
+{
+	const ID3v2::Frame *frame = (const ID3v2::Frame *)f;
+	if (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)
+		{
+			if (language)
+				memcpy(language, parsed.language, 3);
+			
+			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_Comments_Set(nsid3v2_frame_t f, const char *description, const char language[3], 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=description?strlen(description):0;
+
+		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 */ + 3 /* language */ + 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 */
+		if (language)
+			bytewriter_write_n(&byte_writer, language, 3);
+		else
+			bytewriter_write_zero_n(&byte_writer, 3);
+		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_Comments_Set(nsid3v2_tag_t t, const char *description, const char language[3], 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_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 && (!description || DescriptionMatches(parsed.description, description, text_flags)))
+		{
+			break;
+		}
+
+		frame = tag->FindNextFrame(frame);
+	}
+
+	if (!frame)
+	{
+		frame = tag->NewFrame(NSID3V2_FRAME_COMMENTS, 0);
+		if (!frame)
+			return NErr_OutOfMemory;
+		tag->AddFrame(frame);
+	}
+
+	return NSID3v2_Frame_Comments_Set((nsid3v2_frame_t)frame, description, language, value, text_flags);
+}