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MIDI: Make seeking neater by moving it into another file. Will be more useful later.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15467 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Stepan Moskovchenko 2007-11-05 05:35:10 +00:00
parent 47eb569b62
commit bdfe87c0f1
3 changed files with 71 additions and 63 deletions
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73
apps/plugins/midi/sequencer.c
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@ -142,7 +142,6 @@ const uint32_t pitchTbl[] ICONST_ATTR={
static void findDelta(struct SynthObject * so, int ch, int note)
{
struct GWaveform * wf = patchSet[chPat[ch]]->waveforms[patchSet[chPat[ch]]->noteTable[note]];
so->wf=wf;
unsigned int delta= 0;
@ -152,6 +151,18 @@ static void findDelta(struct SynthObject * so, int ch, int note)
so->delta = delta;
}
static inline void computeDeltas(int ch)
{
int a=0;
for(a = 0; a<MAX_VOICES; a++)
{
if(voices[a].isUsed==1 && voices[a].ch == ch)
{
findDelta(&voices[a], ch, voices[a].note);
}
}
}
static inline void setPW(int ch, int msb, int lsb)
{
chPW[ch] = msb<<2|lsb>>5;
@ -160,14 +171,7 @@ static inline void setPW(int ch, int msb, int lsb)
chPBNoteOffset[ch] = totalBend >> 8;
chPBFractBend[ch] = pitchTbl[(totalBend & 0xFF) + 256];
int a=0;
for(a = 0; a<MAX_VOICES; a++)
{
if(voices[a].isUsed==1 && voices[a].ch == ch)
{
findDelta(&voices[a], ch, voices[a].note);
}
}
computeDeltas(ch);
}
inline void pressNote(int ch, int note, int vol)
@ -376,7 +380,58 @@ void rewindFile(void)
}
}
int tick(void) ICODE_ATTR;
void seekBackward(int nsec)
{
int notesUsed = 0, a=0;
int desiredTime = playingTime - nsec; /* Rewind 5 sec */
if(desiredTime < 0)
desiredTime = 0;
/* Set controllers to default values */
resetControllers();
/* Set the tempo to defalt */
bpm=mf->div*1000000/tempo;
numberOfSamples=SAMPLE_RATE/bpm;
/* Reset the tracks to start */
rewindFile();
/* Reset the time counter to 0 */
playingTime = 0;
samplesThisSecond = 0;
/* Quickly run through any initial things that occur before notes */
do
{
notesUsed = 0;
for(a=0; a<MAX_VOICES; a++)
if(voices[a].isUsed == 1)
notesUsed++;
tick();
} while(notesUsed == 0);
/* Reset the time counter to 0 */
playingTime = 0;
samplesThisSecond = 0;
/* Tick until goal is reached */
while(playingTime < desiredTime)
tick();
}
void seekForward(int nsec)
{
int desiredTime = playingTime + nsec;
while(tick() && playingTime < desiredTime);
}
int tick(void)
{
if(mf==NULL)