* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/thread.h"
#include "libavcodec/internal.h"
#include "libavcodec/mathops.h"
#include "avcodec.h"
av_cold void ff_init_dsd_data(void)
{
- static int done = 0;
- if (done)
- return;
- dsd_ctables_tableinit();
- done = 1;
+ static AVOnce init_static_once = AV_ONCE_INIT;
+ ff_thread_once(&init_static_once, dsd_ctables_tableinit);
}
void ff_dsd2pcm_translate(DSDContext* s, size_t samples, int lsbf,
- const unsigned char *src, ptrdiff_t src_stride,
+ const uint8_t *src, ptrdiff_t src_stride,
float *dst, ptrdiff_t dst_stride)
{
+ uint8_t buf[FIFOSIZE];
unsigned pos, i;
- unsigned char* p;
+ uint8_t* p;
double sum;
pos = s->pos;
+ memcpy(buf, s->buf, sizeof(buf));
+
while (samples-- > 0) {
- s->buf[pos] = lsbf ? ff_reverse[*src] : *src;
+ buf[pos] = lsbf ? ff_reverse[*src] : *src;
src += src_stride;
- p = s->buf + ((pos - CTABLES) & FIFOMASK);
+ p = buf + ((pos - CTABLES) & FIFOMASK);
*p = ff_reverse[*p];
sum = 0.0;
for (i = 0; i < CTABLES; i++) {
- unsigned char a = s->buf[(pos - i) & FIFOMASK];
- unsigned char b = s->buf[(pos - (CTABLES*2 - 1) + i) & FIFOMASK];
+ uint8_t a = buf[(pos - i) & FIFOMASK];
+ uint8_t b = buf[(pos - (CTABLES*2 - 1) + i) & FIFOMASK];
sum += ctables[i][a] + ctables[i][b];
}
}
s->pos = pos;
+ memcpy(s->buf, buf, sizeof(buf));
}