96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
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#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 ParsedPopularimeter
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{
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ParsedString email;
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uint8_t rating;
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uint64_t playcount;
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};
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static int ParsePopularimeter(const void *data, size_t data_len, ParsedPopularimeter &parsed)
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{
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int ret;
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if (data_len < 6)
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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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/* read email (Always latin-1) */
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ret = ParseNullTerminatedString(&byte_reader, 0, parsed.email);
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if (ret != NErr_Success)
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return ret;
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if (bytereader_size(&byte_reader) == 0)
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return NErr_Insufficient;
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parsed.rating = bytereader_read_u8(&byte_reader);
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parsed.playcount=0;
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while (bytereader_size(&byte_reader))
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{
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parsed.playcount <<= 8;
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parsed.playcount |= bytereader_read_u8(&byte_reader);
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}
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return NErr_Success;
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}
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int NSID3v2_Tag_Popularimeter_GetRatingPlaycount(const nsid3v2_tag_t t, const char *email, uint8_t *rating, uint64_t *playcount)
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{
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const ID3v2::Tag *tag = (const ID3v2::Tag *)t;
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if (!tag)
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return NErr_Empty;
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const ID3v2::Frame *frame = tag->FindFirstFrame(NSID3V2_FRAME_POPULARIMETER);
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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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ParsedPopularimeter parsed;
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if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParsePopularimeter(data, data_len, parsed) == NErr_Success)
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{
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if (!strcasecmp(email, (const char *)parsed.email.data))
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{
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*rating = parsed.rating;
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*playcount = parsed.playcount;
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return NErr_Success;
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}
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}
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frame = tag->FindNextFrame(frame);
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}
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return NErr_Empty;
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}
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int NSID3v2_Frame_Popularity_Get(nsid3v2_frame_t f, nx_string_t *email, uint8_t *rating, uint64_t *playcount, 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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ParsedPopularimeter parsed;
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if (frame->GetData(&data, &data_len) == NErr_Success && data_len > 0 && ParsePopularimeter(data, data_len, parsed) == NErr_Success)
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{
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int ret = NXStringCreateFromParsedString(email, parsed.email, text_flags);
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if (ret != NErr_Success)
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return ret;
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*rating = parsed.rating;
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*playcount = parsed.playcount;
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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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