Remove global motion from compressed header

This requires making a temporary copy of the functions in
binary_codes_writer/reader to take in the aom_write_bit_buffer type.

Change-Id: Idb60b29cff69b45224535c6e6a4079a34a2c6871

aom_dsp/binary_codes_reader.c

@@ -53,6 +53,15 @@ uint16_t aom_read_primitive_quniform_(aom_reader *r,
   return v < m ? v : (v << 1) - m + aom_read_bit(r, ACCT_STR_NAME);
 }
 
+static uint16_t aom_rb_read_primitive_quniform(struct aom_read_bit_buffer *rb,
+                                               uint16_t n) {
+  if (n <= 1) return 0;
+  const int l = get_msb(n - 1) + 1;
+  const int m = (1 << l) - n;
+  const int v = aom_rb_read_literal(rb, l - 1);
+  return v < m ? v : (v << 1) - m + aom_rb_read_bit(rb);
+}
+
 uint16_t aom_read_primitive_refbilevel_(aom_reader *r, uint16_t n, uint16_t p,
                                         uint16_t ref ACCT_STR_PARAM) {
   if (n <= 1) return 0;
@@ -101,15 +110,42 @@ uint16_t aom_read_primitive_subexpfin_(aom_reader *r, uint16_t n,
   return v;
 }
 
-// Decode finite subexponential code that for a symbol v in [0, n-1] with
-// parameter k
-// based on a reference ref also in [0, n-1].
+static uint16_t aom_rb_read_primitive_subexpfin(struct aom_read_bit_buffer *rb,
+                                                uint16_t n, uint16_t k) {
+  int i = 0;
+  int mk = 0;
+  uint16_t v;
+  while (1) {
+    int b = (i ? k + i - 1 : k);
+    int a = (1 << b);
+    if (n <= mk + 3 * a) {
+      v = aom_rb_read_primitive_quniform(rb, n - mk) + mk;
+      break;
+    } else {
+      if (aom_rb_read_bit(rb)) {
+        i = i + 1;
+        mk += a;
+      } else {
+        v = aom_rb_read_literal(rb, b) + mk;
+        break;
+      }
+    }
+  }
+  return v;
+}
+
 uint16_t aom_read_primitive_refsubexpfin_(aom_reader *r, uint16_t n, uint16_t k,
                                           uint16_t ref ACCT_STR_PARAM) {
   return inv_recenter_finite_nonneg(
       n, ref, aom_read_primitive_subexpfin(r, n, k, ACCT_STR_NAME));
 }
 
+static uint16_t aom_rb_read_primitive_refsubexpfin(
+    struct aom_read_bit_buffer *rb, uint16_t n, uint16_t k, uint16_t ref) {
+  return inv_recenter_finite_nonneg(n, ref,
+                                    aom_rb_read_primitive_subexpfin(rb, n, k));
+}
+
 // Decode finite subexponential code that for a symbol v in [-(n-1), n-1] with
 // parameter k based on a reference ref also in [-(n-1), n-1].
 int16_t aom_read_signed_primitive_refsubexpfin_(aom_reader *r, uint16_t n,
@@ -120,3 +156,10 @@ int16_t aom_read_signed_primitive_refsubexpfin_(aom_reader *r, uint16_t n,
   return aom_read_primitive_refsubexpfin(r, scaled_n, k, ref, ACCT_STR_NAME) -
          n + 1;
 }
+
+int16_t aom_rb_read_signed_primitive_refsubexpfin(
+    struct aom_read_bit_buffer *rb, uint16_t n, uint16_t k, int16_t ref) {
+  ref += n - 1;
+  const uint16_t scaled_n = (n << 1) - 1;
+  return aom_rb_read_primitive_refsubexpfin(rb, scaled_n, k, ref) - n + 1;
+}

aom_dsp/binary_codes_reader.h

@@ -17,9 +17,11 @@ extern "C" {
 #endif
 
 #include <assert.h>
+
 #include "./aom_config.h"
 #include "aom/aom_integer.h"
 #include "aom_dsp/bitreader.h"
+#include "aom_dsp/bitreader_buffer.h"
 
 #define aom_read_primitive_symmetric(r, n, ACCT_STR_NAME) \
   aom_read_primitive_symmetric_(r, n ACCT_STR_ARG(ACCT_STR_NAME))
@@ -47,6 +49,9 @@ uint16_t aom_read_primitive_refsubexpfin_(aom_reader *r, uint16_t n, uint16_t k,
 int16_t aom_read_signed_primitive_refsubexpfin_(aom_reader *r, uint16_t n,
                                                 uint16_t k,
                                                 int16_t ref ACCT_STR_PARAM);
+
+int16_t aom_rb_read_signed_primitive_refsubexpfin(
+    struct aom_read_bit_buffer *rb, uint16_t n, uint16_t k, int16_t ref);
 #ifdef __cplusplus
 }  // extern "C"
 #endif

aom_dsp/binary_codes_writer.c

@@ -10,6 +10,7 @@
  */
 
 #include "aom_dsp/bitwriter.h"
+#include "aom_dsp/binary_codes_writer.h"
 
 #include "av1/common/common.h"
 
@@ -68,6 +69,19 @@ void aom_write_primitive_quniform(aom_writer *w, uint16_t n, uint16_t v) {
   }
 }
 
+static void aom_wb_write_primitive_quniform(struct aom_write_bit_buffer *wb,
+                                            uint16_t n, uint16_t v) {
+  if (n <= 1) return;
+  const int l = get_msb(n - 1) + 1;
+  const int m = (1 << l) - n;
+  if (v < m) {
+    aom_wb_write_literal(wb, v, l - 1);
+  } else {
+    aom_wb_write_literal(wb, m + ((v - m) >> 1), l - 1);
+    aom_wb_write_bit(wb, (v - m) & 1);
+  }
+}
+
 int aom_count_primitive_quniform(uint16_t n, uint16_t v) {
   if (n <= 1) return 0;
   const int l = get_msb(n - 1) + 1;
@@ -155,6 +169,31 @@ void aom_write_primitive_subexpfin(aom_writer *w, uint16_t n, uint16_t k,
   }
 }
 
+static void aom_wb_write_primitive_subexpfin(struct aom_write_bit_buffer *wb,
+                                             uint16_t n, uint16_t k,
+                                             uint16_t v) {
+  int i = 0;
+  int mk = 0;
+  while (1) {
+    int b = (i ? k + i - 1 : k);
+    int a = (1 << b);
+    if (n <= mk + 3 * a) {
+      aom_wb_write_primitive_quniform(wb, n - mk, v - mk);
+      break;
+    } else {
+      int t = (v >= mk + a);
+      aom_wb_write_bit(wb, t);
+      if (t) {
+        i = i + 1;
+        mk += a;
+      } else {
+        aom_wb_write_literal(wb, v - mk, b);
+        break;
+      }
+    }
+  }
+}
+
 int aom_count_primitive_subexpfin(uint16_t n, uint16_t k, uint16_t v) {
   int count = 0;
   int i = 0;
@@ -184,19 +223,34 @@ int aom_count_primitive_subexpfin(uint16_t n, uint16_t k, uint16_t v) {
 // based on a reference ref also in [0, n-1].
 // Recenters symbol around r first and then uses a finite subexponential code.
 void aom_write_primitive_refsubexpfin(aom_writer *w, uint16_t n, uint16_t k,
-                                      int16_t ref, int16_t v) {
+                                      uint16_t ref, uint16_t v) {
   aom_write_primitive_subexpfin(w, n, k, recenter_finite_nonneg(n, ref, v));
 }
 
+static void aom_wb_write_primitive_refsubexpfin(struct aom_write_bit_buffer *wb,
+                                                uint16_t n, uint16_t k,
+                                                uint16_t ref, uint16_t v) {
+  aom_wb_write_primitive_subexpfin(wb, n, k, recenter_finite_nonneg(n, ref, v));
+}
+
 void aom_write_signed_primitive_refsubexpfin(aom_writer *w, uint16_t n,
-                                             uint16_t k, uint16_t ref,
-                                             uint16_t v) {
+                                             uint16_t k, int16_t ref,
+                                             int16_t v) {
   ref += n - 1;
   v += n - 1;
   const uint16_t scaled_n = (n << 1) - 1;
   aom_write_primitive_refsubexpfin(w, scaled_n, k, ref, v);
 }
 
+void aom_wb_write_signed_primitive_refsubexpfin(struct aom_write_bit_buffer *wb,
+                                                uint16_t n, uint16_t k,
+                                                int16_t ref, int16_t v) {
+  ref += n - 1;
+  v += n - 1;
+  const uint16_t scaled_n = (n << 1) - 1;
+  aom_wb_write_primitive_refsubexpfin(wb, scaled_n, k, ref, v);
+}
+
 int aom_count_primitive_refsubexpfin(uint16_t n, uint16_t k, uint16_t ref,
                                      uint16_t v) {
   return aom_count_primitive_subexpfin(n, k, recenter_finite_nonneg(n, ref, v));

aom_dsp/binary_codes_writer.h

@@ -20,6 +20,7 @@ extern "C" {
 #include "./aom_config.h"
 #include "aom/aom_integer.h"
 #include "aom_dsp/bitwriter.h"
+#include "aom_dsp/bitwriter_buffer.h"
 
 // Codes a symbol v in [-2^mag_bits, 2^mag_bits]
 // mag_bits is number of bits for magnitude. The alphabet is of size
@@ -53,6 +54,10 @@ void aom_write_signed_primitive_refsubexpfin(aom_writer *w, uint16_t n,
                                              uint16_t k, int16_t ref,
                                              int16_t v);
 
+void aom_wb_write_signed_primitive_refsubexpfin(struct aom_write_bit_buffer *wb,
+                                                uint16_t n, uint16_t k,
+                                                int16_t ref, int16_t v);
+
 // Functions that counts bits for the above primitives
 int aom_count_primitive_symmetric(int16_t v, unsigned int mag_bits);
 int aom_count_primitive_quniform(uint16_t n, uint16_t v);