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Unfork ANS pack_mb_tokens

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This is less code and more like what we have in aom/master.

Change-Id: I5ed915563cbfbc6281113c1eb31455f50710ba9f
This commit is contained in:
Alex Converse
2016-10-11 16:50:56 -07:00
parent 3265ef3d1d
commit dc62b0925d
1 changed files with 16 additions and 78 deletions
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94
av1/encoder/bitstream.c
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@@ -620,7 +620,6 @@ static void update_supertx_probs(AV1_COMMON *cm, aom_writer *w) {
} }
#endif // CONFIG_SUPERTX #endif // CONFIG_SUPERTX
#if !CONFIG_ANS
static void pack_mb_tokens(aom_writer *w, const TOKENEXTRA **tp, static void pack_mb_tokens(aom_writer *w, const TOKENEXTRA **tp,
const TOKENEXTRA *const stop, const TOKENEXTRA *const stop,
aom_bit_depth_t bit_depth, const TX_SIZE tx) { aom_bit_depth_t bit_depth, const TX_SIZE tx) {
@@ -632,9 +631,11 @@ static void pack_mb_tokens(aom_writer *w, const TOKENEXTRA **tp,
while (p < stop && p->token != EOSB_TOKEN) { while (p < stop && p->token != EOSB_TOKEN) {
const int t = p->token; const int t = p->token;
#if !CONFIG_ANS
const struct av1_token *const a = &av1_coef_encodings[t]; const struct av1_token *const a = &av1_coef_encodings[t];
int v = a->value; int v = a->value;
int n = a->len; int n = a->len;
#endif // !CONFIG_ANS
#if CONFIG_AOM_HIGHBITDEPTH #if CONFIG_AOM_HIGHBITDEPTH
const av1_extra_bit *b; const av1_extra_bit *b;
if (bit_depth == AOM_BITS_12) if (bit_depth == AOM_BITS_12)
@@ -648,6 +649,19 @@ static void pack_mb_tokens(aom_writer *w, const TOKENEXTRA **tp,
(void)bit_depth; (void)bit_depth;
#endif // CONFIG_AOM_HIGHBITDEPTH #endif // CONFIG_AOM_HIGHBITDEPTH
#if CONFIG_ANS
/* skip one or two nodes */
if (!p->skip_eob_node) aom_write(w, t != EOB_TOKEN, p->context_tree[0]);
if (t != EOB_TOKEN) {
struct rans_sym s;
const rans_lut *token_cdf = p->token_cdf;
assert(token_cdf);
s.cum_prob = (*token_cdf)[t - ZERO_TOKEN];
s.prob = (*token_cdf)[t - ZERO_TOKEN + 1] - s.cum_prob;
buf_rans_write(w, &s);
}
#else
/* skip one or two nodes */ /* skip one or two nodes */
if (p->skip_eob_node) if (p->skip_eob_node)
n -= p->skip_eob_node; n -= p->skip_eob_node;
@@ -668,6 +682,7 @@ static void pack_mb_tokens(aom_writer *w, const TOKENEXTRA **tp,
} }
} }
} }
#endif // CONFIG_ANS
if (b->base_val) { if (b->base_val) {
const int e = p->extra, l = b->len; const int e = p->extra, l = b->len;
@@ -705,83 +720,6 @@ static void pack_mb_tokens(aom_writer *w, const TOKENEXTRA **tp,
*tp = p; *tp = p;
} }
#else
// This function serializes the tokens in forward order using a buffered ans
// coder.
static void pack_mb_tokens(struct BufAnsCoder *ans, const TOKENEXTRA **tp,
const TOKENEXTRA *const stop,
aom_bit_depth_t bit_depth, const TX_SIZE tx) {
const TOKENEXTRA *p = *tp;
#if CONFIG_VAR_TX
int count = 0;
const int seg_eob = 16 << (tx << 1);
#endif // CONFIG_VAR_TX
while (p < stop && p->token != EOSB_TOKEN) {
const int t = p->token;
#if CONFIG_AOM_HIGHBITDEPTH
const av1_extra_bit *b;
if (bit_depth == AOM_BITS_12)
b = &av1_extra_bits_high12[t];
else if (bit_depth == AOM_BITS_10)
b = &av1_extra_bits_high10[t];
else
b = &av1_extra_bits[t];
#else
const av1_extra_bit *const b = &av1_extra_bits[t];
(void)bit_depth;
#endif // CONFIG_AOM_HIGHBITDEPTH
/* skip one or two nodes */
if (!p->skip_eob_node)
buf_uabs_write(ans, t != EOB_TOKEN, p->context_tree[0]);
if (t != EOB_TOKEN) {
struct rans_sym s;
const rans_lut *token_cdf = p->token_cdf;
assert(token_cdf);
s.cum_prob = (*token_cdf)[t - ZERO_TOKEN];
s.prob = (*token_cdf)[t - ZERO_TOKEN + 1] - s.cum_prob;
buf_rans_write(ans, &s);
if (b->base_val) {
const int e = p->extra, l = b->len;
int skip_bits = (b->base_val == CAT6_MIN_VAL)
? TX_SIZES - 1 - txsize_sqr_up_map[tx]
: 0;
if (l) {
const unsigned char *pb = b->prob;
int v = e >> 1;
int n = l; /* number of bits in v, assumed nonzero */
int i = 0;
do {
const int bb = (v >> --n) & 1;
if (skip_bits) {
skip_bits--;
assert(!bb);
} else {
buf_uabs_write(ans, bb, pb[i >> 1]);
}
i = b->tree[i + bb];
} while (n);
}
buf_uabs_write(ans, e & 1, 128);
}
}
++p;
#if CONFIG_VAR_TX
++count;
if (t == EOB_TOKEN || count == seg_eob) break;
#endif // CONFIG_VAR_TX
}
*tp = p;
}
#endif // !CONFIG_ANS
#if CONFIG_VAR_TX #if CONFIG_VAR_TX
static void pack_txb_tokens(aom_writer *w, const TOKENEXTRA **tp, static void pack_txb_tokens(aom_writer *w, const TOKENEXTRA **tp,