1 files changed, 110 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/bitwriter.h b/third_party/aom/aom_dsp/bitwriter.h
new file mode 100644
index 0000000000..6aedd8ceb9
--- /dev/null
+++ b/third_party/aom/aom_dsp/bitwriter.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AOM_DSP_BITWRITER_H_
+#define AOM_AOM_DSP_BITWRITER_H_
+
+#include <assert.h>
+
+#include "config/aom_config.h"
+
+#include "aom_dsp/entenc.h"
+#include "aom_dsp/prob.h"
+
+#if CONFIG_RD_DEBUG
+#include "av1/common/blockd.h"
+#include "av1/encoder/cost.h"
+#endif
+
+#if CONFIG_BITSTREAM_DEBUG
+#include "aom_util/debug_util.h"
+#endif  // CONFIG_BITSTREAM_DEBUG
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct aom_writer {
+  unsigned int pos;
+  uint8_t *buffer;
+  od_ec_enc ec;
+  uint8_t allow_update_cdf;
+};
+
+typedef struct aom_writer aom_writer;
+
+typedef struct TOKEN_STATS {
+  int cost;
+#if CONFIG_RD_DEBUG
+  int txb_coeff_cost_map[TXB_COEFF_COST_MAP_SIZE][TXB_COEFF_COST_MAP_SIZE];
+#endif
+} TOKEN_STATS;
+
+static INLINE void init_token_stats(TOKEN_STATS *token_stats) {
+#if CONFIG_RD_DEBUG
+  int r, c;
+  for (r = 0; r < TXB_COEFF_COST_MAP_SIZE; ++r) {
+    for (c = 0; c < TXB_COEFF_COST_MAP_SIZE; ++c) {
+      token_stats->txb_coeff_cost_map[r][c] = 0;
+    }
+  }
+#endif
+  token_stats->cost = 0;
+}
+
+void aom_start_encode(aom_writer *w, uint8_t *buffer);
+
+// Returns a negative number on error. Caller must check the return value and
+// handle error.
+int aom_stop_encode(aom_writer *w);
+
+int aom_tell_size(aom_writer *w);
+
+static INLINE void aom_write(aom_writer *w, int bit, int probability) {
+  int p = (0x7FFFFF - (probability << 15) + probability) >> 8;
+#if CONFIG_BITSTREAM_DEBUG
+  aom_cdf_prob cdf[2] = { (aom_cdf_prob)p, 32767 };
+  bitstream_queue_push(bit, cdf, 2);
+#endif
+
+  od_ec_encode_bool_q15(&w->ec, bit, p);
+}
+
+static INLINE void aom_write_bit(aom_writer *w, int bit) {
+  aom_write(w, bit, 128);  // aom_prob_half
+}
+
+static INLINE void aom_write_literal(aom_writer *w, int data, int bits) {
+  int bit;
+
+  for (bit = bits - 1; bit >= 0; bit--) aom_write_bit(w, 1 & (data >> bit));
+}
+
+static INLINE void aom_write_cdf(aom_writer *w, int symb,
+                                 const aom_cdf_prob *cdf, int nsymbs) {
+#if CONFIG_BITSTREAM_DEBUG
+  bitstream_queue_push(symb, cdf, nsymbs);
+#endif
+
+  od_ec_encode_cdf_q15(&w->ec, symb, cdf, nsymbs);
+}
+
+static INLINE void aom_write_symbol(aom_writer *w, int symb, aom_cdf_prob *cdf,
+                                    int nsymbs) {
+  aom_write_cdf(w, symb, cdf, nsymbs);
+  if (w->allow_update_cdf) update_cdf(cdf, symb, nsymbs);
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AOM_DSP_BITWRITER_H_