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Diffstat (limited to '')
-rw-r--r-- | media/libvpx/libvpx/vp9/encoder/vp9_aq_360.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/vp9_aq_360.c b/media/libvpx/libvpx/vp9/encoder/vp9_aq_360.c new file mode 100644 index 0000000000..dba017ffcc --- /dev/null +++ b/media/libvpx/libvpx/vp9/encoder/vp9_aq_360.c @@ -0,0 +1,75 @@ +/* + * Copyright (c) 2013 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 <math.h> + +#include "vpx_ports/mem.h" +#include "vpx_ports/system_state.h" + +#include "vp9/encoder/vp9_aq_360.h" +#include "vp9/encoder/vp9_aq_variance.h" + +#include "vp9/common/vp9_seg_common.h" + +#include "vp9/encoder/vp9_ratectrl.h" +#include "vp9/encoder/vp9_rd.h" +#include "vp9/encoder/vp9_segmentation.h" + +static const double rate_ratio[MAX_SEGMENTS] = { 1.0, 0.75, 0.6, 0.5, + 0.4, 0.3, 0.25 }; + +// Sets segment id 0 for the equatorial region, 1 for temperate region +// and 2 for the polar regions +unsigned int vp9_360aq_segment_id(int mi_row, int mi_rows) { + if (mi_row < mi_rows / 8 || mi_row > mi_rows - mi_rows / 8) + return 2; + else if (mi_row < mi_rows / 4 || mi_row > mi_rows - mi_rows / 4) + return 1; + else + return 0; +} + +void vp9_360aq_frame_setup(VP9_COMP *cpi) { + VP9_COMMON *cm = &cpi->common; + struct segmentation *seg = &cm->seg; + int i; + + if (frame_is_intra_only(cm) || cpi->force_update_segmentation || + cm->error_resilient_mode) { + vp9_enable_segmentation(seg); + vp9_clearall_segfeatures(seg); + + seg->abs_delta = SEGMENT_DELTADATA; + + vpx_clear_system_state(); + + for (i = 0; i < MAX_SEGMENTS; ++i) { + int qindex_delta = + vp9_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex, + rate_ratio[i], cm->bit_depth); + + // We don't allow qindex 0 in a segment if the base value is not 0. + // Q index 0 (lossless) implies 4x4 encoding only and in AQ mode a segment + // Q delta is sometimes applied without going back around the rd loop. + // This could lead to an illegal combination of partition size and q. + if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) { + qindex_delta = -cm->base_qindex + 1; + } + + // No need to enable SEG_LVL_ALT_Q for this segment. + if (rate_ratio[i] == 1.0) { + continue; + } + + vp9_set_segdata(seg, i, SEG_LVL_ALT_Q, qindex_delta); + vp9_enable_segfeature(seg, i, SEG_LVL_ALT_Q); + } + } +} |