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Diffstat (limited to 'media/ffvpx/libavcodec/vp9mvs.c')
-rw-r--r--media/ffvpx/libavcodec/vp9mvs.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/vp9mvs.c b/media/ffvpx/libavcodec/vp9mvs.c
new file mode 100644
index 0000000000..88db1c341c
--- /dev/null
+++ b/media/ffvpx/libavcodec/vp9mvs.c
@@ -0,0 +1,364 @@
+/*
+ * VP9 compatible video decoder
+ *
+ * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
+ * Copyright (C) 2013 Clément Bœsch <u pkh me>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "internal.h"
+#include "vp56.h"
+#include "vp9.h"
+#include "vp9data.h"
+#include "vp9dec.h"
+
+static av_always_inline void clamp_mv(VP56mv *dst, const VP56mv *src,
+ VP9TileData *td)
+{
+ dst->x = av_clip(src->x, td->min_mv.x, td->max_mv.x);
+ dst->y = av_clip(src->y, td->min_mv.y, td->max_mv.y);
+}
+
+static void find_ref_mvs(VP9TileData *td,
+ VP56mv *pmv, int ref, int z, int idx, int sb)
+{
+ static const int8_t mv_ref_blk_off[N_BS_SIZES][8][2] = {
+ [BS_64x64] = { { 3, -1 }, { -1, 3 }, { 4, -1 }, { -1, 4 },
+ { -1, -1 }, { 0, -1 }, { -1, 0 }, { 6, -1 } },
+ [BS_64x32] = { { 0, -1 }, { -1, 0 }, { 4, -1 }, { -1, 2 },
+ { -1, -1 }, { 0, -3 }, { -3, 0 }, { 2, -1 } },
+ [BS_32x64] = { { -1, 0 }, { 0, -1 }, { -1, 4 }, { 2, -1 },
+ { -1, -1 }, { -3, 0 }, { 0, -3 }, { -1, 2 } },
+ [BS_32x32] = { { 1, -1 }, { -1, 1 }, { 2, -1 }, { -1, 2 },
+ { -1, -1 }, { 0, -3 }, { -3, 0 }, { -3, -3 } },
+ [BS_32x16] = { { 0, -1 }, { -1, 0 }, { 2, -1 }, { -1, -1 },
+ { -1, 1 }, { 0, -3 }, { -3, 0 }, { -3, -3 } },
+ [BS_16x32] = { { -1, 0 }, { 0, -1 }, { -1, 2 }, { -1, -1 },
+ { 1, -1 }, { -3, 0 }, { 0, -3 }, { -3, -3 } },
+ [BS_16x16] = { { 0, -1 }, { -1, 0 }, { 1, -1 }, { -1, 1 },
+ { -1, -1 }, { 0, -3 }, { -3, 0 }, { -3, -3 } },
+ [BS_16x8] = { { 0, -1 }, { -1, 0 }, { 1, -1 }, { -1, -1 },
+ { 0, -2 }, { -2, 0 }, { -2, -1 }, { -1, -2 } },
+ [BS_8x16] = { { -1, 0 }, { 0, -1 }, { -1, 1 }, { -1, -1 },
+ { -2, 0 }, { 0, -2 }, { -1, -2 }, { -2, -1 } },
+ [BS_8x8] = { { 0, -1 }, { -1, 0 }, { -1, -1 }, { 0, -2 },
+ { -2, 0 }, { -1, -2 }, { -2, -1 }, { -2, -2 } },
+ [BS_8x4] = { { 0, -1 }, { -1, 0 }, { -1, -1 }, { 0, -2 },
+ { -2, 0 }, { -1, -2 }, { -2, -1 }, { -2, -2 } },
+ [BS_4x8] = { { 0, -1 }, { -1, 0 }, { -1, -1 }, { 0, -2 },
+ { -2, 0 }, { -1, -2 }, { -2, -1 }, { -2, -2 } },
+ [BS_4x4] = { { 0, -1 }, { -1, 0 }, { -1, -1 }, { 0, -2 },
+ { -2, 0 }, { -1, -2 }, { -2, -1 }, { -2, -2 } },
+ };
+ VP9Context *s = td->s;
+ VP9Block *b = td->b;
+ int row = td->row, col = td->col, row7 = td->row7;
+ const int8_t (*p)[2] = mv_ref_blk_off[b->bs];
+#define INVALID_MV 0x80008000U
+ uint32_t mem = INVALID_MV, mem_sub8x8 = INVALID_MV;
+ int i;
+
+#define RETURN_DIRECT_MV(mv) \
+ do { \
+ uint32_t m = AV_RN32A(&mv); \
+ if (!idx) { \
+ AV_WN32A(pmv, m); \
+ return; \
+ } else if (mem == INVALID_MV) { \
+ mem = m; \
+ } else if (m != mem) { \
+ AV_WN32A(pmv, m); \
+ return; \
+ } \
+ } while (0)
+
+ if (sb >= 0) {
+ if (sb == 2 || sb == 1) {
+ RETURN_DIRECT_MV(b->mv[0][z]);
+ } else if (sb == 3) {
+ RETURN_DIRECT_MV(b->mv[2][z]);
+ RETURN_DIRECT_MV(b->mv[1][z]);
+ RETURN_DIRECT_MV(b->mv[0][z]);
+ }
+
+#define RETURN_MV(mv) \
+ do { \
+ if (sb > 0) { \
+ VP56mv tmp; \
+ uint32_t m; \
+ av_assert2(idx == 1); \
+ av_assert2(mem != INVALID_MV); \
+ if (mem_sub8x8 == INVALID_MV) { \
+ clamp_mv(&tmp, &mv, td); \
+ m = AV_RN32A(&tmp); \
+ if (m != mem) { \
+ AV_WN32A(pmv, m); \
+ return; \
+ } \
+ mem_sub8x8 = AV_RN32A(&mv); \
+ } else if (mem_sub8x8 != AV_RN32A(&mv)) { \
+ clamp_mv(&tmp, &mv, td); \
+ m = AV_RN32A(&tmp); \
+ if (m != mem) { \
+ AV_WN32A(pmv, m); \
+ } else { \
+ /* BUG I'm pretty sure this isn't the intention */ \
+ AV_WN32A(pmv, 0); \
+ } \
+ return; \
+ } \
+ } else { \
+ uint32_t m = AV_RN32A(&mv); \
+ if (!idx) { \
+ clamp_mv(pmv, &mv, td); \
+ return; \
+ } else if (mem == INVALID_MV) { \
+ mem = m; \
+ } else if (m != mem) { \
+ clamp_mv(pmv, &mv, td); \
+ return; \
+ } \
+ } \
+ } while (0)
+
+ if (row > 0) {
+ VP9mvrefPair *mv = &s->s.frames[CUR_FRAME].mv[(row - 1) * s->sb_cols * 8 + col];
+ if (mv->ref[0] == ref)
+ RETURN_MV(s->above_mv_ctx[2 * col + (sb & 1)][0]);
+ else if (mv->ref[1] == ref)
+ RETURN_MV(s->above_mv_ctx[2 * col + (sb & 1)][1]);
+ }
+ if (col > td->tile_col_start) {
+ VP9mvrefPair *mv = &s->s.frames[CUR_FRAME].mv[row * s->sb_cols * 8 + col - 1];
+ if (mv->ref[0] == ref)
+ RETURN_MV(td->left_mv_ctx[2 * row7 + (sb >> 1)][0]);
+ else if (mv->ref[1] == ref)
+ RETURN_MV(td->left_mv_ctx[2 * row7 + (sb >> 1)][1]);
+ }
+ i = 2;
+ } else {
+ i = 0;
+ }
+
+ // previously coded MVs in this neighborhood, using same reference frame
+ for (; i < 8; i++) {
+ int c = p[i][0] + col, r = p[i][1] + row;
+
+ if (c >= td->tile_col_start && c < s->cols &&
+ r >= 0 && r < s->rows) {
+ VP9mvrefPair *mv = &s->s.frames[CUR_FRAME].mv[r * s->sb_cols * 8 + c];
+
+ if (mv->ref[0] == ref)
+ RETURN_MV(mv->mv[0]);
+ else if (mv->ref[1] == ref)
+ RETURN_MV(mv->mv[1]);
+ }
+ }
+
+ // MV at this position in previous frame, using same reference frame
+ if (s->s.h.use_last_frame_mvs) {
+ VP9mvrefPair *mv = &s->s.frames[REF_FRAME_MVPAIR].mv[row * s->sb_cols * 8 + col];
+
+ if (!s->s.frames[REF_FRAME_MVPAIR].uses_2pass)
+ ff_thread_await_progress(&s->s.frames[REF_FRAME_MVPAIR].tf, row >> 3, 0);
+ if (mv->ref[0] == ref)
+ RETURN_MV(mv->mv[0]);
+ else if (mv->ref[1] == ref)
+ RETURN_MV(mv->mv[1]);
+ }
+
+#define RETURN_SCALE_MV(mv, scale) \
+ do { \
+ if (scale) { \
+ VP56mv mv_temp = { -mv.x, -mv.y }; \
+ RETURN_MV(mv_temp); \
+ } else { \
+ RETURN_MV(mv); \
+ } \
+ } while (0)
+
+ // previously coded MVs in this neighborhood, using different reference frame
+ for (i = 0; i < 8; i++) {
+ int c = p[i][0] + col, r = p[i][1] + row;
+
+ if (c >= td->tile_col_start && c < s->cols && r >= 0 && r < s->rows) {
+ VP9mvrefPair *mv = &s->s.frames[CUR_FRAME].mv[r * s->sb_cols * 8 + c];
+
+ if (mv->ref[0] != ref && mv->ref[0] >= 0)
+ RETURN_SCALE_MV(mv->mv[0],
+ s->s.h.signbias[mv->ref[0]] != s->s.h.signbias[ref]);
+ if (mv->ref[1] != ref && mv->ref[1] >= 0 &&
+ // BUG - libvpx has this condition regardless of whether
+ // we used the first ref MV and pre-scaling
+ AV_RN32A(&mv->mv[0]) != AV_RN32A(&mv->mv[1])) {
+ RETURN_SCALE_MV(mv->mv[1], s->s.h.signbias[mv->ref[1]] != s->s.h.signbias[ref]);
+ }
+ }
+ }
+
+ // MV at this position in previous frame, using different reference frame
+ if (s->s.h.use_last_frame_mvs) {
+ VP9mvrefPair *mv = &s->s.frames[REF_FRAME_MVPAIR].mv[row * s->sb_cols * 8 + col];
+
+ // no need to await_progress, because we already did that above
+ if (mv->ref[0] != ref && mv->ref[0] >= 0)
+ RETURN_SCALE_MV(mv->mv[0], s->s.h.signbias[mv->ref[0]] != s->s.h.signbias[ref]);
+ if (mv->ref[1] != ref && mv->ref[1] >= 0 &&
+ // BUG - libvpx has this condition regardless of whether
+ // we used the first ref MV and pre-scaling
+ AV_RN32A(&mv->mv[0]) != AV_RN32A(&mv->mv[1])) {
+ RETURN_SCALE_MV(mv->mv[1], s->s.h.signbias[mv->ref[1]] != s->s.h.signbias[ref]);
+ }
+ }
+
+ AV_ZERO32(pmv);
+ clamp_mv(pmv, pmv, td);
+#undef INVALID_MV
+#undef RETURN_MV
+#undef RETURN_SCALE_MV
+}
+
+static av_always_inline int read_mv_component(VP9TileData *td, int idx, int hp)
+{
+ VP9Context *s = td->s;
+ int bit, sign = vp56_rac_get_prob(td->c, s->prob.p.mv_comp[idx].sign);
+ int n, c = vp8_rac_get_tree(td->c, ff_vp9_mv_class_tree,
+ s->prob.p.mv_comp[idx].classes);
+
+ td->counts.mv_comp[idx].sign[sign]++;
+ td->counts.mv_comp[idx].classes[c]++;
+ if (c) {
+ int m;
+
+ for (n = 0, m = 0; m < c; m++) {
+ bit = vp56_rac_get_prob(td->c, s->prob.p.mv_comp[idx].bits[m]);
+ n |= bit << m;
+ td->counts.mv_comp[idx].bits[m][bit]++;
+ }
+ n <<= 3;
+ bit = vp8_rac_get_tree(td->c, ff_vp9_mv_fp_tree,
+ s->prob.p.mv_comp[idx].fp);
+ n |= bit << 1;
+ td->counts.mv_comp[idx].fp[bit]++;
+ if (hp) {
+ bit = vp56_rac_get_prob(td->c, s->prob.p.mv_comp[idx].hp);
+ td->counts.mv_comp[idx].hp[bit]++;
+ n |= bit;
+ } else {
+ n |= 1;
+ // bug in libvpx - we count for bw entropy purposes even if the
+ // bit wasn't coded
+ td->counts.mv_comp[idx].hp[1]++;
+ }
+ n += 8 << c;
+ } else {
+ n = vp56_rac_get_prob(td->c, s->prob.p.mv_comp[idx].class0);
+ td->counts.mv_comp[idx].class0[n]++;
+ bit = vp8_rac_get_tree(td->c, ff_vp9_mv_fp_tree,
+ s->prob.p.mv_comp[idx].class0_fp[n]);
+ td->counts.mv_comp[idx].class0_fp[n][bit]++;
+ n = (n << 3) | (bit << 1);
+ if (hp) {
+ bit = vp56_rac_get_prob(td->c, s->prob.p.mv_comp[idx].class0_hp);
+ td->counts.mv_comp[idx].class0_hp[bit]++;
+ n |= bit;
+ } else {
+ n |= 1;
+ // bug in libvpx - we count for bw entropy purposes even if the
+ // bit wasn't coded
+ td->counts.mv_comp[idx].class0_hp[1]++;
+ }
+ }
+
+ return sign ? -(n + 1) : (n + 1);
+}
+
+void ff_vp9_fill_mv(VP9TileData *td, VP56mv *mv, int mode, int sb)
+{
+ VP9Context *s = td->s;
+ VP9Block *b = td->b;
+
+ if (mode == ZEROMV) {
+ AV_ZERO64(mv);
+ } else {
+ int hp;
+
+ // FIXME cache this value and reuse for other subblocks
+ find_ref_mvs(td, &mv[0], b->ref[0], 0, mode == NEARMV,
+ mode == NEWMV ? -1 : sb);
+ // FIXME maybe move this code into find_ref_mvs()
+ if ((mode == NEWMV || sb == -1) &&
+ !(hp = s->s.h.highprecisionmvs &&
+ abs(mv[0].x) < 64 && abs(mv[0].y) < 64)) {
+ if (mv[0].y & 1) {
+ if (mv[0].y < 0)
+ mv[0].y++;
+ else
+ mv[0].y--;
+ }
+ if (mv[0].x & 1) {
+ if (mv[0].x < 0)
+ mv[0].x++;
+ else
+ mv[0].x--;
+ }
+ }
+ if (mode == NEWMV) {
+ enum MVJoint j = vp8_rac_get_tree(td->c, ff_vp9_mv_joint_tree,
+ s->prob.p.mv_joint);
+
+ td->counts.mv_joint[j]++;
+ if (j >= MV_JOINT_V)
+ mv[0].y += read_mv_component(td, 0, hp);
+ if (j & 1)
+ mv[0].x += read_mv_component(td, 1, hp);
+ }
+
+ if (b->comp) {
+ // FIXME cache this value and reuse for other subblocks
+ find_ref_mvs(td, &mv[1], b->ref[1], 1, mode == NEARMV,
+ mode == NEWMV ? -1 : sb);
+ if ((mode == NEWMV || sb == -1) &&
+ !(hp = s->s.h.highprecisionmvs &&
+ abs(mv[1].x) < 64 && abs(mv[1].y) < 64)) {
+ if (mv[1].y & 1) {
+ if (mv[1].y < 0)
+ mv[1].y++;
+ else
+ mv[1].y--;
+ }
+ if (mv[1].x & 1) {
+ if (mv[1].x < 0)
+ mv[1].x++;
+ else
+ mv[1].x--;
+ }
+ }
+ if (mode == NEWMV) {
+ enum MVJoint j = vp8_rac_get_tree(td->c, ff_vp9_mv_joint_tree,
+ s->prob.p.mv_joint);
+
+ td->counts.mv_joint[j]++;
+ if (j >= MV_JOINT_V)
+ mv[1].y += read_mv_component(td, 0, hp);
+ if (j & 1)
+ mv[1].x += read_mv_component(td, 1, hp);
+ }
+ }
+ }
+}
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