libvpx: Add VP9 decoder.

source/libvpx/vp9/encoder/vp9_encodeintra.c

+/*
+ *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "vpx_ports/config.h"
+#include "vp9_rtcd.h"
+#include "vp9/encoder/vp9_quantize.h"
+#include "vp9/common/vp9_reconintra.h"
+#include "vp9/common/vp9_reconintra4x4.h"
+#include "vp9/encoder/vp9_encodemb.h"
+#include "vp9/common/vp9_invtrans.h"
+#include "vp9/encoder/vp9_encodeintra.h"
+
+int vp9_encode_intra(VP9_COMP *cpi, MACROBLOCK *x, int use_16x16_pred) {
+  int i;
+  int intra_pred_var = 0;
+  MB_MODE_INFO * mbmi = &x->e_mbd.mode_info_context->mbmi;
+  (void) cpi;
+
+  if (use_16x16_pred) {
+    mbmi->mode = DC_PRED;
+#if CONFIG_COMP_INTRA_PRED
+    mbmi->second_mode = (MB_PREDICTION_MODE)(DC_PRED - 1);
+#endif
+    mbmi->uv_mode = DC_PRED;
+    mbmi->ref_frame = INTRA_FRAME;
+
+    vp9_encode_intra16x16mby(x);
+  } else {
+    for (i = 0; i < 16; i++) {
+      x->e_mbd.block[i].bmi.as_mode.first = B_DC_PRED;
+      vp9_encode_intra4x4block(x, i);
+    }
+  }
+
+  intra_pred_var = vp9_get_mb_ss(x->src_diff);
+
+  return intra_pred_var;
+}
+
+void vp9_encode_intra4x4block(MACROBLOCK *x, int ib) {
+  BLOCKD *b = &x->e_mbd.block[ib];
+  BLOCK *be = &x->block[ib];
+  TX_TYPE tx_type;
+
+#if CONFIG_NEWBINTRAMODES
+  b->bmi.as_mode.context = vp9_find_bpred_context(b);
+#endif
+
+#if CONFIG_COMP_INTRA_PRED
+  if (b->bmi.as_mode.second == (B_PREDICTION_MODE)(B_DC_PRED - 1)) {
+#endif
+    vp9_intra4x4_predict(b, b->bmi.as_mode.first, b->predictor);
+#if CONFIG_COMP_INTRA_PRED
+  } else {
+    vp9_comp_intra4x4_predict(b, b->bmi.as_mode.first, b->bmi.as_mode.second,
+                              b->predictor);
+  }
+#endif
+
+  vp9_subtract_b(be, b, 16);
+
+  tx_type = get_tx_type_4x4(&x->e_mbd, b);
+  if (tx_type != DCT_DCT) {
+    vp9_fht(be->src_diff, 32, be->coeff, tx_type, 4);
+    vp9_ht_quantize_b_4x4(be, b, tx_type);
+    vp9_ihtllm(b->dqcoeff, b->diff, 32, tx_type, 4);
+  } else {
+    x->vp9_short_fdct4x4(be->src_diff, be->coeff, 32);
+    x->quantize_b_4x4(be, b) ;
+    vp9_inverse_transform_b_4x4(&x->e_mbd, ib, 32);
+  }
+
+  vp9_recon_b(b->predictor, b->diff, *(b->base_dst) + b->dst, b->dst_stride);
+}
+
+void vp9_encode_intra4x4mby(MACROBLOCK *mb) {
+  int i;
+
+  for (i = 0; i < 16; i++)
+    vp9_encode_intra4x4block(mb, i);
+  return;
+}
+
+void vp9_encode_intra16x16mby(MACROBLOCK *x) {
+  MACROBLOCKD *xd = &x->e_mbd;
+  BLOCK *b = &x->block[0];
+  TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
+
+#if CONFIG_COMP_INTRA_PRED
+  if (xd->mode_info_context->mbmi.second_mode == (MB_PREDICTION_MODE)(DC_PRED - 1))
+#endif
+    vp9_build_intra_predictors_mby(xd);
+#if CONFIG_COMP_INTRA_PRED
+  else
+    vp9_build_comp_intra_predictors_mby(xd);
+#endif
+
+  vp9_subtract_mby(x->src_diff, *(b->base_src), xd->predictor, b->src_stride);
+
+  if (tx_size == TX_16X16) {
+    vp9_transform_mby_16x16(x);
+    vp9_quantize_mby_16x16(x);
+    if (x->optimize)
+      vp9_optimize_mby_16x16(x);
+    vp9_inverse_transform_mby_16x16(xd);
+  } else if (tx_size == TX_8X8) {
+    vp9_transform_mby_8x8(x);
+    vp9_quantize_mby_8x8(x);
+    if (x->optimize)
+      vp9_optimize_mby_8x8(x);
+    vp9_inverse_transform_mby_8x8(xd);
+  } else {
+    vp9_transform_mby_4x4(x);
+    vp9_quantize_mby_4x4(x);
+    if (x->optimize)
+      vp9_optimize_mby_4x4(x);
+    vp9_inverse_transform_mby_4x4(xd);
+  }
+
+  vp9_recon_mby(xd);
+}
+
+void vp9_encode_intra16x16mbuv(MACROBLOCK *x) {
+  MACROBLOCKD *xd = &x->e_mbd;
+  TX_SIZE tx_size = xd->mode_info_context->mbmi.txfm_size;
+
+#if CONFIG_COMP_INTRA_PRED
+  if (xd->mode_info_context->mbmi.second_uv_mode == (MB_PREDICTION_MODE)(DC_PRED - 1)) {
+#endif
+    vp9_build_intra_predictors_mbuv(xd);
+#if CONFIG_COMP_INTRA_PRED
+  } else {
+    vp9_build_comp_intra_predictors_mbuv(xd);
+  }
+#endif
+
+  vp9_subtract_mbuv(x->src_diff, x->src.u_buffer, x->src.v_buffer,
+                    xd->predictor, x->src.uv_stride);
+
+  if (tx_size == TX_4X4) {
+    vp9_transform_mbuv_4x4(x);
+    vp9_quantize_mbuv_4x4(x);
+    if (x->optimize)
+      vp9_optimize_mbuv_4x4(x);
+    vp9_inverse_transform_mbuv_4x4(xd);
+  } else /* 16x16 or 8x8 */ {
+    vp9_transform_mbuv_8x8(x);
+    vp9_quantize_mbuv_8x8(x);
+    if (x->optimize)
+      vp9_optimize_mbuv_8x8(x);
+    vp9_inverse_transform_mbuv_8x8(xd);
+  }
+
+  vp9_recon_intra_mbuv(xd);
+}
+
+void vp9_encode_intra8x8(MACROBLOCK *x, int ib) {
+  MACROBLOCKD *xd = &x->e_mbd;
+  BLOCKD *b = &xd->block[ib];
+  BLOCK *be = &x->block[ib];
+  const int iblock[4] = {0, 1, 4, 5};
+  int i;
+  TX_TYPE tx_type;
+
+#if CONFIG_COMP_INTRA_PRED
+  if (b->bmi.as_mode.second == (MB_PREDICTION_MODE)(DC_PRED - 1)) {
+#endif
+    vp9_intra8x8_predict(b, b->bmi.as_mode.first, b->predictor);
+#if CONFIG_COMP_INTRA_PRED
+  } else {
+    vp9_comp_intra8x8_predict(b, b->bmi.as_mode.first, b->bmi.as_mode.second,
+                              b->predictor);
+  }
+#endif
+  // generate residual blocks
+  vp9_subtract_4b_c(be, b, 16);
+
+  if (xd->mode_info_context->mbmi.txfm_size == TX_8X8) {
+    int idx = (ib & 0x02) ? (ib + 2) : ib;
+
+    tx_type = get_tx_type_8x8(xd, &xd->block[ib]);
+    if (tx_type != DCT_DCT) {
+      vp9_fht(be->src_diff, 32, (x->block + idx)->coeff,
+                tx_type, 8);
+      x->quantize_b_8x8(x->block + idx, xd->block + idx);
+      vp9_ihtllm(xd->block[idx].dqcoeff, xd->block[ib].diff, 32,
+                   tx_type, 8);
+    } else {
+      x->vp9_short_fdct8x8(be->src_diff, (x->block + idx)->coeff, 32);
+      x->quantize_b_8x8(x->block + idx, xd->block + idx);
+      vp9_short_idct8x8(xd->block[idx].dqcoeff, xd->block[ib].diff, 32);
+    }
+  } else {
+    for (i = 0; i < 4; i++) {
+      b = &xd->block[ib + iblock[i]];
+      be = &x->block[ib + iblock[i]];
+      tx_type = get_tx_type_4x4(xd, b);
+      if (tx_type != DCT_DCT) {
+        vp9_fht_c(be->src_diff, 32, be->coeff, tx_type, 4);
+        vp9_ht_quantize_b_4x4(be, b, tx_type);
+        vp9_ihtllm(b->dqcoeff, b->diff, 32, tx_type, 4);
+      } else {
+        x->vp9_short_fdct4x4(be->src_diff, be->coeff, 32);
+        x->quantize_b_4x4(be, b);
+        vp9_inverse_transform_b_4x4(xd, ib + iblock[i], 32);
+      }
+    }
+  }
+
+  // reconstruct submacroblock
+  for (i = 0; i < 4; i++) {
+    b = &xd->block[ib + iblock[i]];
+    vp9_recon_b_c(b->predictor, b->diff, *(b->base_dst) + b->dst,
+                  b->dst_stride);
+  }
+}
+
+void vp9_encode_intra8x8mby(MACROBLOCK *x) {
+  int i, ib;
+
+  for (i = 0; i < 4; i++) {
+    ib = vp9_i8x8_block[i];
+    vp9_encode_intra8x8(x, ib);
+  }
+}
+
+void vp9_encode_intra_uv4x4(MACROBLOCK *x, int ib,
+                            int mode, int second) {
+  BLOCKD *b = &x->e_mbd.block[ib];
+  BLOCK *be = &x->block[ib];
+
+#if CONFIG_COMP_INTRA_PRED
+  if (second == -1) {
+#endif
+    vp9_intra_uv4x4_predict(b, mode, b->predictor);
+#if CONFIG_COMP_INTRA_PRED
+  } else {
+    vp9_comp_intra_uv4x4_predict(b, mode, second, b->predictor);
+  }
+#endif
+
+  vp9_subtract_b(be, b, 8);
+
+  x->vp9_short_fdct4x4(be->src_diff, be->coeff, 16);
+  x->quantize_b_4x4(be, b);
+  vp9_inverse_transform_b_4x4(&x->e_mbd, ib, 16);
+
+  vp9_recon_uv_b_c(b->predictor, b->diff, *(b->base_dst) + b->dst,
+                   b->dst_stride);
+}
+
+void vp9_encode_intra8x8mbuv(MACROBLOCK *x) {
+  int i, ib, mode, second;
+  BLOCKD *b;
+
+  for (i = 0; i < 4; i++) {
+    ib = vp9_i8x8_block[i];
+    b = &x->e_mbd.block[ib];
+    mode = b->bmi.as_mode.first;
+#if CONFIG_COMP_INTRA_PRED
+    second = b->bmi.as_mode.second;
+#else
+    second = -1;
+#endif
+    /*u */
+    vp9_encode_intra_uv4x4(x, i + 16, mode, second);
+    /*v */
+    vp9_encode_intra_uv4x4(x, i + 20, mode, second);
+  }
+}