87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
#include "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/ByteReader.h"
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#include "nx/nxstring.h"
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#if defined(_WIN32) && !defined(strcasecmp)
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#define strcasecmp _stricmp
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#else
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#include <strings.h>
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#endif
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struct ParsedObject
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{
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ParsedString mime;
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ParsedString filename;
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ParsedString description;
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const void *object_data;
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size_t object_byte_length;
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};
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static int ParseObject(const void *data, size_t data_len, ParsedObject &parsed)
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{
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int ret;
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if (data_len == 0)
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return NErr_Insufficient;
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bytereader_value_t byte_reader;
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bytereader_init(&byte_reader, data, data_len);
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/* encoding */
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uint8_t encoding = bytereader_read_u8(&byte_reader);
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/* read mime type (Always latin-1) */
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ret = ParseNullTerminatedString(&byte_reader, 0, parsed.mime);
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if (ret != NErr_Success)
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return ret;
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/* read filename */
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ret = ParseNullTerminatedString(&byte_reader, encoding, parsed.filename);
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if (ret != NErr_Success)
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return ret;
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/* read content description */
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ret = ParseNullTerminatedString(&byte_reader, encoding, parsed.description);
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if (ret != NErr_Success)
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return ret;
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parsed.object_data = bytereader_pointer(&byte_reader);
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parsed.object_byte_length = bytereader_size(&byte_reader);
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return NErr_Success;
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}
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int NSID3v2_Frame_Object_Get(const nsid3v2_frame_t f, nx_string_t *mime, nx_string_t *filename, nx_string_t *description, const void **out_data, size_t *length, int text_flags)
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{
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const ID3v2::Frame *frame = (const ID3v2::Frame *)f;
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if (frame)
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{
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const void *data;
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size_t data_len;
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ParsedObject parsed;
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if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParseObject(data, data_len, parsed) == NErr_Success)
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{
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int ret = NXStringCreateFromParsedString(mime, parsed.mime, text_flags);
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if (ret != NErr_Success)
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return ret;
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ret = NXStringCreateFromParsedString(filename, parsed.filename, text_flags);
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if (ret != NErr_Success)
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return ret;
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ret = NXStringCreateFromParsedString(description, parsed.description, text_flags);
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if (ret != NErr_Success)
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return ret;
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*out_data = parsed.object_data;
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*length = parsed.object_byte_length;
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return NErr_Success;
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}
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}
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return NErr_Empty;
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}
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