extern void vp8_init_scan_order_mask();
-static void update_mode_info_border(MODE_INFO *mi, int rows, int cols)
+static void update_mode_info_border( VP8_COMMON *cpi, MODE_INFO *mi_base )
{
+ int stride = cpi->mode_info_stride;
int i;
- vpx_memset(mi - cols - 2, 0, sizeof(MODE_INFO) * (cols + 1));
- for (i = 0; i < rows; i++)
+ // Clear down top border row
+ vpx_memset(mi_base, 0, sizeof(MODE_INFO) * cpi->mode_info_stride);
+
+ // Clear left border column
+ for (i = 1; i < cpi->mb_rows+1; i++)
{
- /* TODO(holmer): Bug? This updates the last element of each row
- * rather than the border element!
- */
- vpx_memset(&mi[i*cols-1], 0, sizeof(MODE_INFO));
+ vpx_memset(&mi_base[i*stride], 0, sizeof(MODE_INFO));
+ }
+}
+static void update_mode_info_in_image( VP8_COMMON *cpi, MODE_INFO *mi )
+{
+ int stride = cpi->mode_info_stride;
+ int rows = cpi->mb_rows;
+ int cols = cpi->mb_cols;
+ int i, j;
+
+ // For each in image mode_info element set the in image flag to 1
+ for (i = 0; i < cpi->mb_rows; i++)
+ {
+ for (j = 0; j < cpi->mb_cols; j++)
+ {
+ mi->mbmi.mb_in_image = 1;
+ mi++; // Next element in the row
+ }
+
+ mi++; // Step over border element at start of next row
}
}
return 1;
}
- update_mode_info_border(oci->mi, oci->mb_rows, oci->mb_cols);
+ update_mode_info_border(oci, oci->mip);
+ update_mode_info_in_image(oci, oci->mi);
#if CONFIG_ERROR_CONCEALMENT
- update_mode_info_border(oci->prev_mi, oci->mb_rows, oci->mb_cols);
+ update_mode_info_border(oci, oci->prev_mip);
+ update_mode_info_in_image(oci, oci->prev_mi);
#endif
return 0;
--- /dev/null
+/*
+ * 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 "vp8/common/pred_common.h"
+
+// TBD prediction functions for various bitstream signals
+
+// Returns a context number for the given MB prediction signal
+unsigned char get_pred_context( VP8_COMMON *const cm,
+ MACROBLOCKD *const xd,
+ PRED_ID pred_id )
+{
+ int pred_context;
+ MODE_INFO *m = xd->mode_info_context;
+
+ // Note:
+ // The mode info data structure has a one element border above and to the
+ // left of the entries correpsonding to real macroblocks.
+ // The prediction flags in these dummy entries are initialised to 0.
+ switch (pred_id)
+ {
+ case PRED_SEG_ID:
+ pred_context = (m - 1)->mbmi.seg_id_predicted +
+ (m - cm->mode_info_stride)->mbmi.seg_id_predicted;
+ break;
+
+
+#if CONFIG_COMPRED
+
+ case PRED_REF:
+ pred_context = (m - 1)->mbmi.ref_predicted +
+ (m - cm->mode_info_stride)->mbmi.ref_predicted;
+ break;
+#endif
+
+ default:
+ // TODO *** add error trap code.
+ pred_context = 0;
+ break;
+ }
+
+ return pred_context;
+}
+
+// This function returns a context probability for coding a given
+// prediction signal
+vp8_prob get_pred_prob( VP8_COMMON *const cm,
+ MACROBLOCKD *const xd,
+ PRED_ID pred_id )
+{
+ vp8_prob pred_probability;
+ int pred_context;
+
+ // Get the appropriate prediction context
+ pred_context = get_pred_context( cm, xd, pred_id );
+
+ switch (pred_id)
+ {
+ case PRED_SEG_ID:
+ pred_probability = cm->segment_pred_probs[pred_context];
+ break;
+
+#if CONFIG_COMPRED
+
+ case PRED_REF:
+ pred_probability = cm->ref_pred_probs[pred_context];
+ break;
+#endif
+
+ default:
+ // TODO *** add error trap code.
+ pred_probability = 128;
+ break;
+ }
+
+ return pred_probability;
+}
+
+// This function returns the status of the given prediction signal.
+// I.e. is the predicted value for the given signal correct.
+unsigned char get_pred_flag( MACROBLOCKD *const xd,
+ PRED_ID pred_id )
+{
+ unsigned char pred_flag = 0;
+
+ switch (pred_id)
+ {
+ case PRED_SEG_ID:
+ pred_flag = xd->mode_info_context->mbmi.seg_id_predicted;
+ break;
+
+#if CONFIG_COMPRED
+
+ case PRED_REF:
+ pred_flag = xd->mode_info_context->mbmi.ref_predicted;
+ break;
+#endif
+
+ default:
+ // TODO *** add error trap code.
+ pred_flag = 0;
+ break;
+}
+
+ return pred_flag;
+}
+
+// This function sets the status of the given prediction signal.
+// I.e. is the predicted value for the given signal correct.
+void set_pred_flag( MACROBLOCKD *const xd,
+ PRED_ID pred_id,
+ unsigned char pred_flag)
+{
+ switch (pred_id)
+ {
+ case PRED_SEG_ID:
+ xd->mode_info_context->mbmi.seg_id_predicted = pred_flag;
+ break;
+
+#if CONFIG_COMPRED
+
+ case PRED_REF:
+ xd->mode_info_context->mbmi.ref_predicted = pred_flag;
+ break;
+#endif
+
+ default:
+ // TODO *** add error trap code.
+ break;
+ }
+}
+
+
+// The following contain the guts of the prediction code used to
+// peredict various bitstream signals.
+
+// Macroblock segment id prediction function
+unsigned char get_pred_mb_segid( VP8_COMMON *const cm, int MbIndex )
+{
+ // Currently the prediction for the macroblock segment ID is
+ // the value stored for this macroblock in the previous frame.
+ return cm->last_frame_seg_map[MbIndex];
+}
+
+#if CONFIG_COMPRED
+MV_REFERENCE_FRAME get_pred_ref( VP8_COMMON *const cm,
+ MACROBLOCKD *const xd )
+{
+ MODE_INFO *m = xd->mode_info_context;
+
+ unsigned char left_pred;
+ unsigned char above_pred;
+
+ MV_REFERENCE_FRAME left;
+ MV_REFERENCE_FRAME above;
+ MV_REFERENCE_FRAME above_left;
+ MV_REFERENCE_FRAME pred_ref = LAST_FRAME;
+
+ // Reference frame used by neighbours
+ left = (m - 1)->mbmi.ref_frame;
+ above = (m - cm->mode_info_stride)->mbmi.ref_frame;
+ above_left = (m - 1 - cm->mode_info_stride)->mbmi.ref_frame;
+
+ // Reference frame prediction status of immediate neigbours.
+ // This can only be set if the mb is "in image"
+ left_pred = (m - 1)->mbmi.ref_predicted;
+ above_pred = (m - cm->mode_info_stride)->mbmi.ref_predicted;
+
+ // Boost prediction scores of above / left if they are predicted and match
+ // the above left.
+ if ( left_pred )
+ left_pred += (left == above_left);
+ if ( above_pred )
+ above_pred += (above == above_left);
+
+ // Only consider "in image" mbs as giving valid prediction.
+ if ( (left == above) &&
+ ((m - 1)->mbmi.mb_in_image ||
+ (m - cm->mode_info_stride)->mbmi.mb_in_image) )
+ {
+ pred_ref = left;
+ }
+ else if ( left_pred > above_pred )
+ {
+ pred_ref = left;
+ }
+ else if ( above_pred > left_pred )
+ {
+ pred_ref = above;
+ }
+ else
+ {
+ // Choose from above or left.
+ // For now this is based on a fixed preference order.
+ // Last,Altref,Golden
+ if ( (left == LAST_FRAME) || (above == LAST_FRAME) )
+ pred_ref = LAST_FRAME;
+ else if ( (left == ALTREF_FRAME) || (above == ALTREF_FRAME) )
+ pred_ref = ALTREF_FRAME;
+ else if ( (left == GOLDEN_FRAME) || (above == GOLDEN_FRAME) )
+ pred_ref = GOLDEN_FRAME;
+ }
+
+ return pred_ref;
+}
+
+// Functions to computes a set of modified reference frame probabilities
+// to use when the prediction of the reference frame value fails
+void calc_ref_probs( int * count, vp8_prob * probs )
+{
+ int tot_count;
+
+ tot_count = count[0] + count[1] + count[2] + count[3];
+ if ( tot_count )
+ {
+ probs[0] = (vp8_prob)((count[0] * 255) / tot_count);
+ probs[0] += !probs[0];
+ }
+ else
+ probs[0] = 128;
+
+ tot_count -= count[0];
+ if ( tot_count )
+ {
+ probs[1] = (vp8_prob)((count[1] * 255) / tot_count);
+ probs[1] += !probs[1];
+ }
+ else
+ probs[1] = 128;
+
+ tot_count -= count[1];
+ if ( tot_count )
+ {
+ probs[2] = (vp8_prob)((count[2] * 255) / tot_count);
+ probs[2] += !probs[2];
+ }
+ else
+ probs[2] = 128;
+
+}
+
+void compute_mod_refprobs( VP8_COMMON *const cm )
+{
+ int norm_cnt[MAX_REF_FRAMES];
+ int intra_count;
+ int inter_count;
+ int last_count;
+ int gfarf_count;
+ int gf_count;
+ int arf_count;
+
+ intra_count = cm->prob_intra_coded;
+ inter_count = (255 - intra_count);
+ last_count = (inter_count * cm->prob_last_coded)/255;
+ gfarf_count = inter_count - last_count;
+ gf_count = (gfarf_count * cm->prob_gf_coded)/255;
+ arf_count = gfarf_count - gf_count;
+
+ // Work out modified reference frame probabilities to use where prediction
+ // of the reference frame fails
+ norm_cnt[0] = 0;
+ norm_cnt[1] = last_count;
+ norm_cnt[2] = gf_count;
+ norm_cnt[3] = arf_count;
+ calc_ref_probs( norm_cnt, cm->mod_refprobs[INTRA_FRAME] );
+ cm->mod_refprobs[INTRA_FRAME][0] = 0; // This branch implicit
+
+ norm_cnt[0] = intra_count;
+ norm_cnt[1] = 0;
+ norm_cnt[2] = gf_count;
+ norm_cnt[3] = arf_count;
+ calc_ref_probs( norm_cnt, cm->mod_refprobs[LAST_FRAME]);
+ cm->mod_refprobs[LAST_FRAME][1] = 0; // This branch implicit
+
+ norm_cnt[0] = intra_count;
+ norm_cnt[1] = last_count;
+ norm_cnt[2] = 0;
+ norm_cnt[3] = arf_count;
+ calc_ref_probs( norm_cnt, cm->mod_refprobs[GOLDEN_FRAME] );
+ cm->mod_refprobs[GOLDEN_FRAME][2] = 0; // This branch implicit
+
+ norm_cnt[0] = intra_count;
+ norm_cnt[1] = last_count;
+ norm_cnt[2] = gf_count;
+ norm_cnt[3] = 0;
+ calc_ref_probs( norm_cnt, cm->mod_refprobs[ALTREF_FRAME] );
+ cm->mod_refprobs[ALTREF_FRAME][2] = 0; // This branch implicit
+
+}
+#endif
--- /dev/null
+/*
+ * 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 "type_aliases.h"
+#include "onyxc_int.h"
+#include "vp8/common/blockd.h"
+
+#ifndef __INC_PRED_COMMON_H__
+#define __INC_PRED_COMMON_H__ 1
+
+
+// Predicted items
+typedef enum
+{
+ PRED_SEG_ID = 0, // Segment identifier
+
+#if CONFIG_COMPRED
+ PRED_REF = 1
+#endif
+
+} PRED_ID;
+
+
+extern unsigned char get_pred_context( VP8_COMMON *const cm,
+ MACROBLOCKD *const xd,
+ PRED_ID pred_id );
+
+extern vp8_prob get_pred_prob( VP8_COMMON *const cm,
+ MACROBLOCKD *const xd,
+ PRED_ID pred_id );
+
+extern unsigned char get_pred_flag( MACROBLOCKD *const xd,
+ PRED_ID pred_id );
+
+extern void set_pred_flag( MACROBLOCKD *const xd,
+ PRED_ID pred_id,
+ unsigned char pred_flag);
+
+
+extern unsigned char get_pred_mb_segid( VP8_COMMON *const cm, int MbIndex );
+
+#if CONFIG_COMPRED
+extern MV_REFERENCE_FRAME get_pred_ref( VP8_COMMON *const cm,
+ MACROBLOCKD *const xd );
+extern void compute_mod_refprobs( VP8_COMMON *const cm );
+
+#endif
+
+#endif /* __INC_PRED_COMMON_H__ */
projects / libvpx / commitdiff