Nyaaori/rockbox
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Increase temp buffer size to fit more samples, put in simple safeguard to avoid memory corruption when writing to the temp buffer

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15253 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nils Wallménius 2007-10-21 22:50:10 +00:00
parent 47d8323deb
commit 2d91cf3ea3
1 changed files with 17 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
apps/plugins/midi/synth.c
View file

@ -424,29 +424,33 @@ static inline void synthVoice(struct SynthObject * so, int32_t * out, unsigned i
/* buffer to hold all the samples for the current tick, this is a hack
neccesary for coldfire targets as pcm_play_data uses the dma which cannot
access iram */
int32_t samp_buf[256] IBSS_ATTR;
int32_t samp_buf[512] IBSS_ATTR;
/* synth num_samples samples and write them to the */
/* buffer pointed to by buf_ptr */
void synthSamples(int32_t *buf_ptr, unsigned int num_samples) ICODE_ATTR;
void synthSamples(int32_t *buf_ptr, unsigned int num_samples)
{
int i;
struct SynthObject *voicept;
rb->memset(samp_buf, 0, num_samples*4);
for(i=0; i < MAX_VOICES; i++)
if (num_samples > 512)
DEBUGF("num_samples is too big!\n");
else
{
voicept=&voices[i];
if(voicept->isUsed==1)
int i;
struct SynthObject *voicept;
rb->memset(samp_buf, 0, num_samples*4);
for(i=0; i < MAX_VOICES; i++)
{
synthVoice(voicept, samp_buf, num_samples);
voicept=&voices[i];
if(voicept->isUsed==1)
{
synthVoice(voicept, samp_buf, num_samples);
}
}
rb->memcpy(buf_ptr, samp_buf, num_samples*4);
}
rb->memcpy(buf_ptr, samp_buf, num_samples*4);
/* TODO: Automatic Gain Control, anyone? */
/* Or, should this be implemented on the DSP's output volume instead? */