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pw-cat: improve DSD file reading

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Support reading non-multiples of the blocksize.
Stop reading at the end of the file.
This commit is contained in:
Wim Taymans 2022-03-03 16:05:03 +01:00
parent ce2f1b3737
commit a6304b47f6
2 changed files with 29 additions and 21 deletions
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45
src/tools/dsffile.c
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@ -214,32 +214,39 @@ ssize_t
dsf_file_read(struct dsf_file *f, void *data, size_t samples, const struct dsf_layout *layout)
{
uint8_t *d = data;
const uint8_t *s;
uint32_t i, j, k, total, stride, bytes, step = SPA_ABS(layout->interleave);
int step = SPA_ABS(layout->interleave);
bool rev = layout->lsb != f->info.lsb;
size_t total, block, offset, pos;
stride = layout->channels * step;
bytes = samples * stride;
bytes -= bytes % f->info.blocksize;
block = f->offset / f->info.blocksize;
offset = block * f->info.blocksize * f->info.channels;
pos = f->offset % f->info.blocksize;
for (total = 0; total < bytes; total += layout->channels * f->info.blocksize) {
s = f->p + f->offset;
for (total = 0; total < samples && offset + pos < f->info.length; total++) {
const uint8_t *s = f->p + offset + pos;
uint32_t i;
for (i = 0; i < f->info.blocksize; i += step) {
for (j = 0; j < layout->channels; j++) {
const uint8_t *c = &s[f->info.blocksize * j + i];
if (layout->interleave > 0) {
for (k = 0; k < step; k++)
*d++ = rev ? bitrev[c[k]] : c[k];
} else {
for (k = step; k > 0; k--)
*d++ = rev ? bitrev[c[k-1]] : c[k-1];
}
for (i = 0; i < layout->channels; i++) {
const uint8_t *c = &s[f->info.blocksize * i];
int j;
if (layout->interleave > 0) {
for (j = 0; j < step; j++)
*d++ = rev ? bitrev[c[j]] : c[j];
} else {
for (j = step-1; j >= 0; j--)
*d++ = rev ? bitrev[c[j]] : c[j];
}
}
f->offset += f->info.channels * f->info.blocksize;
pos += step;
if (pos == f->info.blocksize) {
pos = 0;
offset += f->info.blocksize * f->info.channels;
}
}
return total / stride;
f->offset += total * step;
return total;
}
int dsf_file_close(struct dsf_file *f)