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-rw-r--r--libavcodec/vc1_pred.c119
1 files changed, 50 insertions, 69 deletions
diff --git a/libavcodec/vc1_pred.c b/libavcodec/vc1_pred.c
index 07e9d91f6b..f74992b70d 100644
--- a/libavcodec/vc1_pred.c
+++ b/libavcodec/vc1_pred.c
@@ -4,20 +4,20 @@
* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -392,17 +392,13 @@ void ff_vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y,
/* Pullback MV as specified in 8.3.5.3.4 */
if (!v->field_mode) {
int qx, qy, X, Y;
+ int MV = mv1 ? -60 : -28;
qx = (s->mb_x << 6) + ((n == 1 || n == 3) ? 32 : 0);
qy = (s->mb_y << 6) + ((n == 2 || n == 3) ? 32 : 0);
X = (s->mb_width << 6) - 4;
Y = (s->mb_height << 6) - 4;
- if (mv1) {
- if (qx + px < -60) px = -60 - qx;
- if (qy + py < -60) py = -60 - qy;
- } else {
- if (qx + px < -28) px = -28 - qx;
- if (qy + py < -28) py = -28 - qy;
- }
+ if (qx + px < MV) px = MV - qx;
+ if (qy + py < MV) py = MV - qy;
if (qx + px > X) px = X - qx;
if (qy + py > Y) py = Y - qy;
}
@@ -468,7 +464,7 @@ void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,
MpegEncContext *s = &v->s;
int xy, wrap, off = 0;
int A[2], B[2], C[2];
- int px, py;
+ int px = 0, py = 0;
int a_valid = 0, b_valid = 0, c_valid = 0;
int field_a, field_b, field_c; // 0: same, 1: opposit
int total_valid, num_samefield, num_oppfield;
@@ -602,11 +598,10 @@ void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,
px = mid_pred(A[0], B[0], C[0]);
py = mid_pred(A[1], B[1], C[1]);
} else if (total_valid) {
- if (a_valid) { px = A[0]; py = A[1]; }
- if (b_valid) { px = B[0]; py = B[1]; }
- if (c_valid) { px = C[0]; py = C[1]; }
- } else
- px = py = 0;
+ if (a_valid) { px = A[0]; py = A[1]; }
+ else if (b_valid) { px = B[0]; py = B[1]; }
+ else { px = C[0]; py = C[1]; }
+ }
}
} else {
if (a_valid)
@@ -645,7 +640,8 @@ void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,
} else if (!field_b && b_valid) {
px = B[0];
py = B[1];
- } else if (c_valid) {
+ } else /*if (c_valid)*/ {
+ av_assert1(c_valid);
px = C[0];
py = C[1];
}
@@ -653,7 +649,8 @@ void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,
if (field_a && a_valid) {
px = A[0];
py = A[1];
- } else if (field_b && b_valid) {
+ } else /*if (field_b && b_valid)*/ {
+ av_assert1(field_b && b_valid);
px = B[0];
py = B[1];
}
@@ -661,8 +658,7 @@ void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y,
} else if (total_valid == 1) {
px = (a_valid) ? A[0] : ((b_valid) ? B[0] : C[0]);
py = (a_valid) ? A[1] : ((b_valid) ? B[1] : C[1]);
- } else
- px = py = 0;
+ }
}
/* store MV using signed modulus of MV range defined in 4.11 */
@@ -694,6 +690,8 @@ void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
int r_x, r_y;
const uint8_t *is_intra = v->mb_type[0];
+ av_assert0(!v->field_mode);
+
r_x = v->range_x;
r_y = v->range_y;
/* scale MV difference to be quad-pel */
@@ -706,13 +704,15 @@ void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
xy = s->block_index[0];
if (s->mb_intra) {
- s->current_picture.motion_val[0][xy + v->blocks_off][0] =
- s->current_picture.motion_val[0][xy + v->blocks_off][1] =
- s->current_picture.motion_val[1][xy + v->blocks_off][0] =
- s->current_picture.motion_val[1][xy + v->blocks_off][1] = 0;
+ s->current_picture.motion_val[0][xy][0] =
+ s->current_picture.motion_val[0][xy][1] =
+ s->current_picture.motion_val[1][xy][0] =
+ s->current_picture.motion_val[1][xy][1] = 0;
return;
}
- if (!v->field_mode) {
+ if (direct && s->next_picture_ptr->field_picture)
+ av_log(s->avctx, AV_LOG_WARNING, "Mixed frame/field direct mode not supported\n");
+
s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);
s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);
s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);
@@ -723,12 +723,11 @@ void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
s->mv[0][0][1] = av_clip(s->mv[0][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
s->mv[1][0][0] = av_clip(s->mv[1][0][0], -60 - (s->mb_x << 6), (s->mb_width << 6) - 4 - (s->mb_x << 6));
s->mv[1][0][1] = av_clip(s->mv[1][0][1], -60 - (s->mb_y << 6), (s->mb_height << 6) - 4 - (s->mb_y << 6));
- }
if (direct) {
- s->current_picture.motion_val[0][xy + v->blocks_off][0] = s->mv[0][0][0];
- s->current_picture.motion_val[0][xy + v->blocks_off][1] = s->mv[0][0][1];
- s->current_picture.motion_val[1][xy + v->blocks_off][0] = s->mv[1][0][0];
- s->current_picture.motion_val[1][xy + v->blocks_off][1] = s->mv[1][0][1];
+ s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];
+ s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];
+ s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];
+ s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];
return;
}
@@ -756,25 +755,16 @@ void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
/* Pullback MV as specified in 8.3.5.3.4 */
{
int qx, qy, X, Y;
- if (v->profile < PROFILE_ADVANCED) {
- qx = (s->mb_x << 5);
- qy = (s->mb_y << 5);
- X = (s->mb_width << 5) - 4;
- Y = (s->mb_height << 5) - 4;
- if (qx + px < -28) px = -28 - qx;
- if (qy + py < -28) py = -28 - qy;
- if (qx + px > X) px = X - qx;
- if (qy + py > Y) py = Y - qy;
- } else {
- qx = (s->mb_x << 6);
- qy = (s->mb_y << 6);
- X = (s->mb_width << 6) - 4;
- Y = (s->mb_height << 6) - 4;
- if (qx + px < -60) px = -60 - qx;
- if (qy + py < -60) py = -60 - qy;
- if (qx + px > X) px = X - qx;
- if (qy + py > Y) py = Y - qy;
- }
+ int sh = v->profile < PROFILE_ADVANCED ? 5 : 6;
+ int MV = 4 - (1 << sh);
+ qx = (s->mb_x << sh);
+ qy = (s->mb_y << sh);
+ X = (s->mb_width << sh) - 4;
+ Y = (s->mb_height << sh) - 4;
+ if (qx + px < MV) px = MV - qx;
+ if (qy + py < MV) py = MV - qy;
+ if (qx + px > X) px = X - qx;
+ if (qy + py > Y) py = Y - qy;
}
/* Calculate hybrid prediction as specified in 8.3.5.3.5 */
if (0 && !s->first_slice_line && s->mb_x) {
@@ -835,25 +825,16 @@ void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
/* Pullback MV as specified in 8.3.5.3.4 */
{
int qx, qy, X, Y;
- if (v->profile < PROFILE_ADVANCED) {
- qx = (s->mb_x << 5);
- qy = (s->mb_y << 5);
- X = (s->mb_width << 5) - 4;
- Y = (s->mb_height << 5) - 4;
- if (qx + px < -28) px = -28 - qx;
- if (qy + py < -28) py = -28 - qy;
- if (qx + px > X) px = X - qx;
- if (qy + py > Y) py = Y - qy;
- } else {
- qx = (s->mb_x << 6);
- qy = (s->mb_y << 6);
- X = (s->mb_width << 6) - 4;
- Y = (s->mb_height << 6) - 4;
- if (qx + px < -60) px = -60 - qx;
- if (qy + py < -60) py = -60 - qy;
- if (qx + px > X) px = X - qx;
- if (qy + py > Y) py = Y - qy;
- }
+ int sh = v->profile < PROFILE_ADVANCED ? 5 : 6;
+ int MV = 4 - (1 << sh);
+ qx = (s->mb_x << sh);
+ qy = (s->mb_y << sh);
+ X = (s->mb_width << sh) - 4;
+ Y = (s->mb_height << sh) - 4;
+ if (qx + px < MV) px = MV - qx;
+ if (qy + py < MV) py = MV - qy;
+ if (qx + px > X) px = X - qx;
+ if (qy + py > Y) py = Y - qy;
}
/* Calculate hybrid prediction as specified in 8.3.5.3.5 */
if (0 && !s->first_slice_line && s->mb_x) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 21:26:18 +0000