#define AVUTIL_TX_PRIV_H
#include "tx.h"
-#include <stddef.h>
#include "thread.h"
-#include "mem.h"
+#include "mem_internal.h"
#include "avassert.h"
#include "attributes.h"
#ifdef TX_FLOAT
#define TX_NAME(x) x ## _float
+#define SCALE_TYPE float
typedef float FFTSample;
typedef AVComplexFloat FFTComplex;
#elif defined(TX_DOUBLE)
#define TX_NAME(x) x ## _double
+#define SCALE_TYPE double
typedef double FFTSample;
typedef AVComplexDouble FFTComplex;
+#elif defined(TX_INT32)
+#define TX_NAME(x) x ## _int32
+#define SCALE_TYPE float
+typedef int32_t FFTSample;
+typedef AVComplexInt32 FFTComplex;
#else
typedef void FFTComplex;
#endif
#if defined(TX_FLOAT) || defined(TX_DOUBLE)
-#define BF(x, y, a, b) do { \
- x = (a) - (b); \
- y = (a) + (b); \
- } while (0)
-#define CMUL(dre, dim, are, aim, bre, bim) do { \
+#define CMUL(dre, dim, are, aim, bre, bim) \
+ do { \
(dre) = (are) * (bre) - (aim) * (bim); \
(dim) = (are) * (bim) + (aim) * (bre); \
} while (0)
+
+#define SMUL(dre, dim, are, aim, bre, bim) \
+ do { \
+ (dre) = (are) * (bre) - (aim) * (bim); \
+ (dim) = (are) * (bim) - (aim) * (bre); \
+ } while (0)
+
+#define UNSCALE(x) (x)
+#define RESCALE(x) (x)
+
+#define FOLD(a, b) ((a) + (b))
+
+#elif defined(TX_INT32)
+
+/* Properly rounds the result */
+#define CMUL(dre, dim, are, aim, bre, bim) \
+ do { \
+ int64_t accu; \
+ (accu) = (int64_t)(bre) * (are); \
+ (accu) -= (int64_t)(bim) * (aim); \
+ (dre) = (int)(((accu) + 0x40000000) >> 31); \
+ (accu) = (int64_t)(bim) * (are); \
+ (accu) += (int64_t)(bre) * (aim); \
+ (dim) = (int)(((accu) + 0x40000000) >> 31); \
+ } while (0)
+
+#define SMUL(dre, dim, are, aim, bre, bim) \
+ do { \
+ int64_t accu; \
+ (accu) = (int64_t)(bre) * (are); \
+ (accu) -= (int64_t)(bim) * (aim); \
+ (dre) = (int)(((accu) + 0x40000000) >> 31); \
+ (accu) = (int64_t)(bim) * (are); \
+ (accu) -= (int64_t)(bre) * (aim); \
+ (dim) = (int)(((accu) + 0x40000000) >> 31); \
+ } while (0)
+
+#define UNSCALE(x) ((double)x/2147483648.0)
+#define RESCALE(x) (av_clip64(lrintf((x) * 2147483648.0), INT32_MIN, INT32_MAX))
+
+#define FOLD(x, y) ((int)((x) + (unsigned)(y) + 32) >> 6)
+
#endif
+#define BF(x, y, a, b) \
+ do { \
+ x = (a) - (b); \
+ y = (a) + (b); \
+ } while (0)
+
#define CMUL3(c, a, b) \
CMUL((c).re, (c).im, (a).re, (a).im, (b).re, (b).im)
-#define COSTABLE(size) \
+#define COSTABLE(size) \
DECLARE_ALIGNED(32, FFTSample, TX_NAME(ff_cos_##size))[size/2]
/* Used by asm, reorder with care */
struct AVTXContext {
- int n; /* Nptwo part */
- int m; /* Ptwo part */
- int inv; /* Is inverted */
+ int n; /* Non-power-of-two part */
+ int m; /* Power-of-two part */
+ int inv; /* Is inverse */
int type; /* Type */
+ uint64_t flags; /* Flags */
+ double scale; /* Scale */
FFTComplex *exptab; /* MDCT exptab */
- FFTComplex *tmp; /* Temporary buffer needed for all compound transforms */
+ FFTComplex *tmp; /* Temporary buffer needed for all compound transforms */
int *pfatab; /* Input/Output mapping for compound transforms */
int *revtab; /* Input mapping for power of two transforms */
+ int *inplace_idx; /* Required indices to revtab for in-place transforms */
};
-/* Shared functions */
+/* Checks if type is an MDCT */
+int ff_tx_type_is_mdct(enum AVTXType type);
+
+/*
+ * Generates the PFA permutation table into AVTXContext->pfatab. The end table
+ * is appended to the start table.
+ */
int ff_tx_gen_compound_mapping(AVTXContext *s);
-int ff_tx_gen_ptwo_revtab(AVTXContext *s);
-
-/* Also used by SIMD init */
-static inline int split_radix_permutation(int i, int n, int inverse)
-{
- int m;
- if (n <= 2)
- return i & 1;
- m = n >> 1;
- if (!(i & m))
- return split_radix_permutation(i, m, inverse)*2;
- m >>= 1;
- if (inverse == !(i & m))
- return split_radix_permutation(i, m, inverse)*4 + 1;
- else
- return split_radix_permutation(i, m, inverse)*4 - 1;
-}
-
-/* Templated functions */
+
+/*
+ * Generates a standard-ish (slightly modified) Split-Radix revtab into
+ * AVTXContext->revtab
+ */
+int ff_tx_gen_ptwo_revtab(AVTXContext *s, int invert_lookup);
+
+/*
+ * Generates an index into AVTXContext->inplace_idx that if followed in the
+ * specific order, allows the revtab to be done in-place. AVTXContext->revtab
+ * must already exist.
+ */
+int ff_tx_gen_ptwo_inplace_revtab_idx(AVTXContext *s);
+
+/* Templated init functions */
int ff_tx_init_mdct_fft_float(AVTXContext *s, av_tx_fn *tx,
enum AVTXType type, int inv, int len,
const void *scale, uint64_t flags);
int ff_tx_init_mdct_fft_double(AVTXContext *s, av_tx_fn *tx,
enum AVTXType type, int inv, int len,
const void *scale, uint64_t flags);
+int ff_tx_init_mdct_fft_int32(AVTXContext *s, av_tx_fn *tx,
+ enum AVTXType type, int inv, int len,
+ const void *scale, uint64_t flags);
typedef struct CosTabsInitOnce {
void (*func)(void);
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