Commit 551829d8 authored by Deb Mukherjee's avatar Deb Mukherjee

Miscelleneous changes in detokenize for speed

Changes to reduce branching in detokenization  in order
to improve decode speed.

Change-Id: I23a74d072cc14d99f6fc054c1e6a72021e777903
parent 3a833ea3
......@@ -61,16 +61,18 @@ static const vp9_prob cat6_prob[15] = {
254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0
};
static const int token_to_counttoken[MAX_ENTROPY_TOKENS] = {
ZERO_TOKEN, ONE_TOKEN, TWO_TOKEN, TWO_TOKEN,
TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, TWO_TOKEN,
TWO_TOKEN, TWO_TOKEN, TWO_TOKEN, DCT_EOB_MODEL_TOKEN
};
#define INCREMENT_COUNT(token) \
do { \
if (!cm->frame_parallel_decoding_mode) { \
++coef_counts[type][ref][band][pt] \
[token >= TWO_TOKEN ? \
(token == DCT_EOB_TOKEN ? \
DCT_EOB_MODEL_TOKEN : TWO_TOKEN) : \
token]; \
} \
} while (0)
if (!cm->frame_parallel_decoding_mode) { \
++coef_counts[band][pt][token_to_counttoken[token]]; \
} \
} while (0);
#define WRITE_COEF_CONTINUE(val, token) \
{ \
......@@ -102,7 +104,10 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES];
uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { { 0 } };
const vp9_prob *prob;
vp9_coeff_count_model *coef_counts = counts->coef[tx_size];
unsigned int (*coef_counts)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES + 1] =
counts->coef[tx_size][type][ref];
unsigned int (*eob_branch_count)[PREV_COEF_CONTEXTS] =
counts->eob_branch[tx_size][type][ref];
const int16_t *scan, *nb;
const uint8_t *const band_translate = get_band_translate(tx_size);
get_scan(xd, tx_size, type, block_idx, &scan, &nb);
......@@ -117,7 +122,7 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
band = get_coef_band(band_translate, c);
prob = coef_probs[band][pt];
if (!cm->frame_parallel_decoding_mode)
++counts->eob_branch[tx_size][type][ref][band][pt];
++eob_branch_count[band][pt];
if (!vp9_read(r, prob[EOB_CONTEXT_NODE]))
break;
......@@ -205,7 +210,7 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
if (c < seg_eob) {
if (!cm->frame_parallel_decoding_mode)
++coef_counts[type][ref][band][pt][DCT_EOB_MODEL_TOKEN];
++coef_counts[band][pt][DCT_EOB_MODEL_TOKEN];
}
return c;
......
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