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implement new behaviour of fluid_synth_process()

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This commit is contained in:
derselbst 2018-06-18 12:47:32 +02:00
parent 109db1484b
commit 723816cd5d
1 changed files with 147 additions and 20 deletions
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167
src/synth/fluid_synth.c
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@ -3126,29 +3126,156 @@ int
fluid_synth_process(fluid_synth_t* synth, int len, int nfx, float* fx[],
int nout, float* out[])
{
if (nout==2) {
return fluid_synth_write_float(synth, len, out[0], 0, 1, out[1], 0, 1);
}
else {
float **left, **right;
int i;
left = FLUID_ARRAY(float*, nout/2);
right = FLUID_ARRAY(float*, nout/2);
if ((left == NULL) || (right == NULL)) {
FLUID_LOG(FLUID_ERR, "Out of memory.");
FLUID_FREE(left);
FLUID_FREE(right);
return FLUID_FAILED;
fluid_real_t* left_in, *fx_left_in;
fluid_real_t* right_in, *fx_right_in;
int nfxchan, naudchan;
double time = fluid_utime();
int i, num, count;
float cpu_load;
fluid_return_val_if_fail(synth != NULL, FLUID_FAILED);
fluid_return_val_if_fail(nfx % 2 == 0, FLUID_FAILED);
fluid_return_val_if_fail(nout % 2 == 0, FLUID_FAILED);
nfxchan = synth->effects_channels;
naudchan = synth->audio_channels;
fluid_return_val_if_fail(0 <= nfx/2 && nfx/2 <= nfxchan, FLUID_FAILED);
fluid_return_val_if_fail(0 <= nout/2 && nout/2 <= naudchan, FLUID_FAILED);
fluid_rvoice_mixer_get_bufs(synth->eventhandler->mixer, &left_in, &right_in);
fluid_rvoice_mixer_get_fx_bufs(synth->eventhandler->mixer, &fx_left_in, &fx_right_in);
fluid_rvoice_mixer_set_mix_fx(synth->eventhandler->mixer, FALSE);
/* First, take what's still available in the buffer */
count = 0;
num = synth->cur;
if (synth->cur < FLUID_BUFSIZE)
{
int available = FLUID_BUFSIZE - synth->cur;
num = (available > len)? len : available;
if(nout != 0)
{
for (i = 0; i < naudchan; i++)
{
int j;
float* out_buf = out[(i*2) % nout];
if (out_buf != NULL)
{
for (j = 0; j < num; j++)
{
out_buf[j] += (float) left_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j + synth->cur];
}
}
out_buf = out[(i*2+1) % nout];
if(out_buf != NULL)
{
for (j = 0; j < num; j++)
{
out_buf[j] += (float) right_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j + synth->cur];
}
}
}
}
if(nfx != 0)
{
for (i = 0; i < nfxchan; i++)
{
int j;
float* out_buf = fx[(i*2) % nfx];
if(out_buf != NULL)
{
for (j = 0; j < num; j++)
out_buf[j] += (float) fx_left_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j + synth->cur];
}
out_buf = fx[(i*2+1) % nfx];
if(out_buf != NULL)
{
for (j = 0; j < num; j++)
out_buf[j] += (float) fx_right_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j + synth->cur];
}
}
}
count += num;
num += synth->cur; /* if we're now done, num becomes the new synth->cur below */
}
for(i=0; i<nout/2; i++) {
left[i] = out[2*i];
right[i] = out[2*i+1];
/* Then, render blocks and copy till we have 'len' samples */
while (count < len)
{
int blocksleft = (len-count+FLUID_BUFSIZE-1) / FLUID_BUFSIZE;
int blockcount = fluid_synth_render_blocks(synth, blocksleft);
num = (blockcount*FLUID_BUFSIZE > len - count)? len - count : blockcount*FLUID_BUFSIZE;
if(nout != 0)
{
for (i = 0; i < naudchan; i++)
{
int j;
float* out_buf = out[(i*2) % nout];
if (out_buf != NULL)
{
for (j = 0; j < num; j++)
{
out_buf[j + count] += (float) left_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j];
}
}
out_buf = out[(i*2+1) % nout];
if(out_buf != NULL)
{
for (j = 0; j < num; j++)
{
out_buf[j + count] += (float) right_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j];
}
}
}
}
fluid_synth_nwrite_float(synth, len, left, right, NULL, NULL);
FLUID_FREE(left);
FLUID_FREE(right);
return FLUID_OK;
if(nfx != 0)
{
for (i = 0; i < nfxchan; i++)
{
int j;
float* out_buf = fx[(i*2) % nfx];
if(out_buf != NULL)
{
for (j = 0; j < num; j++)
out_buf[j + count] += (float) fx_left_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j];
}
out_buf = fx[(i*2+1) % nfx];
if(out_buf != NULL)
{
for (j = 0; j < num; j++)
out_buf[j + count] += (float) fx_right_in[i * FLUID_BUFSIZE * FLUID_MIXER_MAX_BUFFERS_DEFAULT + j];
}
}
}
count += num;
}
synth->cur = num;
time = fluid_utime() - time;
cpu_load = 0.5 * (fluid_atomic_float_get(&synth->cpu_load) + time * synth->sample_rate / len / 10000.0);
fluid_atomic_float_set (&synth->cpu_load, cpu_load);
return FLUID_OK;
}
/**