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Added MidiMessage::textMetaEvent method.

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This commit is contained in:
jules 2014-02-19 20:37:15 +00:00
parent b0933193bf
commit 7786943593
4 changed files with 46 additions and 52 deletions
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32
modules/juce_audio_basics/midi/juce_MidiMessage.cpp
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@ -155,7 +155,7 @@ MidiMessage::MidiMessage (const MidiMessage& other, const double newTimeStamp)
MidiMessage::MidiMessage (const void* srcData, int sz, int& numBytesUsed, const uint8 lastStatusByte, double t)
: timeStamp (t)
{
const uint8* src = static_cast <const uint8*> (srcData);
const uint8* src = static_cast<const uint8*> (srcData);
unsigned int byte = (unsigned int) *src;
if (byte < 0x80)
@ -658,6 +658,36 @@ String MidiMessage::getTextFromTextMetaEvent() const
CharPointer_UTF8 (textData + getMetaEventLength()));
}
MidiMessage MidiMessage::textMetaEvent (int type, const StringRef& text)
{
jassert (type > 0 && type < 16)
MidiMessage result;
const size_t textSize = text.text.sizeInBytes() - 1;
uint8 header[8];
size_t n = sizeof (header);
header[--n] = (uint8) (textSize & 0x7f);
for (size_t i = textSize; (i >>= 7) != 0;)
header[--n] = (uint8) ((i & 0x7f) | 0x80);
header[--n] = (uint8) type;
header[--n] = 0xff;
const size_t headerLen = sizeof (header) - n;
uint8* const dest = result.allocateSpace (headerLen + textSize);
result.size = headerLen + textSize;
memcpy (dest, header + n, headerLen);
memcpy (dest + headerLen, text.text.getAddress(), textSize);
return result;
}
bool MidiMessage::isTrackNameEvent() const noexcept { const uint8* data = getRawData(); return (data[1] == 3) && (*data == 0xff); }
bool MidiMessage::isTempoMetaEvent() const noexcept { const uint8* data = getRawData(); return (data[1] == 81) && (*data == 0xff); }
bool MidiMessage::isMidiChannelMetaEvent() const noexcept { const uint8* data = getRawData(); return (data[1] == 0x20) && (*data == 0xff) && (data[2] == 1); }