diff options
Diffstat (limited to 'src/plugins/Input/mad')
| -rw-r--r-- | src/plugins/Input/mad/decodermadfactory.cpp | 38 |
1 files changed, 32 insertions, 6 deletions
diff --git a/src/plugins/Input/mad/decodermadfactory.cpp b/src/plugins/Input/mad/decodermadfactory.cpp index ec64c92ae..c3aebda8a 100644 --- a/src/plugins/Input/mad/decodermadfactory.cpp +++ b/src/plugins/Input/mad/decodermadfactory.cpp @@ -60,24 +60,50 @@ DecoderMADFactory::DecoderMADFactory() bool DecoderMADFactory::canDecode(QIODevice *input) const { - char buf[16 * 512]; + char buf[8192]; + qint64 buf_at = sizeof(buf); - if (input->peek(buf,sizeof(buf)) == sizeof(buf)) + if(input->peek(buf, sizeof(buf)) != sizeof(buf)) + return false; + + if (!memcmp(buf + 8, "WAVE", 4) && !memcmp(buf + 20, "U" ,1)) + return true; + + if(!memcmp(buf, "ID3", 3)) { - if (!memcmp(buf + 8, "WAVE", 4) && !memcmp(buf + 20, "U" ,1)) - return true; + TagLib::ByteVector byteVector(buf, sizeof(buf)); + TagLib::ID3v2::Header header(byteVector); + + //skip id3v2tag if possible + if(input->isSequential()) + { + if(header.tagSize() >= sizeof(buf)) + return false; + + buf_at = sizeof(buf) - header.tagSize(); + memmove(buf, buf + header.tagSize() + header.tagSize(), sizeof(buf) - header.tagSize()); + } + else + { + input->seek(header.tagSize()); + buf_at = input->read(buf, sizeof(buf)); + input->seek(0); + } + } + if(buf_at > 0) + { struct mad_stream stream; struct mad_header header; int dec_res; mad_stream_init (&stream); mad_header_init (&header); - mad_stream_buffer (&stream, (unsigned char *) buf, sizeof(buf)); + mad_stream_buffer (&stream, (unsigned char *) buf, buf_at); stream.error = MAD_ERROR_NONE; while ((dec_res = mad_header_decode(&header, &stream)) == -1 - && MAD_RECOVERABLE(stream.error)) + && MAD_RECOVERABLE(stream.error)) ; return dec_res != -1 ? true: false; } |