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vf_deshake: reduce stack usage.

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Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2014-09-01 23:36:29 +02:00
parent 3980ab12b7
commit 4ea8406e38
2 changed files with 8 additions and 8 deletions
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3
libavfilter/deshake.h
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@ -71,8 +71,11 @@ typedef struct {
#endif
#define MAX_R 64
typedef struct {
const AVClass *class;
int counts[2*MAX_R+1][2*MAX_R+1]; /// < Scratch buffer for motion search
AVFrame *ref; ///< Previous frame
int rx; ///< Maximum horizontal shift
int ry; ///< Maximum vertical shift

13
libavfilter/vf_deshake.c
View File

@ -67,8 +67,6 @@
#define OFFSET(x) offsetof(DeshakeContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define MAX_R 64
static const AVOption deshake_options[] = {
{ "x", "set x for the rectangular search area", OFFSET(cx), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
{ "y", "set y for the rectangular search area", OFFSET(cy), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
@ -242,7 +240,6 @@ static void find_motion(DeshakeContext *deshake, uint8_t *src1, uint8_t *src2,
{
int x, y;
IntMotionVector mv = {0, 0};
int counts[2*MAX_R+1][2*MAX_R+1];
int count_max_value = 0;
int contrast;
@ -254,7 +251,7 @@ static void find_motion(DeshakeContext *deshake, uint8_t *src1, uint8_t *src2,
// Reset counts to zero
for (x = 0; x < deshake->rx * 2 + 1; x++) {
for (y = 0; y < deshake->ry * 2 + 1; y++) {
counts[x][y] = 0;
deshake->counts[x][y] = 0;
}
}
@ -270,7 +267,7 @@ static void find_motion(DeshakeContext *deshake, uint8_t *src1, uint8_t *src2,
//av_log(NULL, AV_LOG_ERROR, "%d\n", contrast);
find_block_motion(deshake, src1, src2, x, y, stride, &mv);
if (mv.x != -1 && mv.y != -1) {
counts[mv.x + deshake->rx][mv.y + deshake->ry] += 1;
deshake->counts[mv.x + deshake->rx][mv.y + deshake->ry] += 1;
if (x > deshake->rx && y > deshake->ry)
angles[pos++] = block_angle(x, y, 0, 0, &mv);
@ -294,11 +291,11 @@ static void find_motion(DeshakeContext *deshake, uint8_t *src1, uint8_t *src2,
// Find the most common motion vector in the frame and use it as the gmv
for (y = deshake->ry * 2; y >= 0; y--) {
for (x = 0; x < deshake->rx * 2 + 1; x++) {
//av_log(NULL, AV_LOG_ERROR, "%5d ", counts[x][y]);
if (counts[x][y] > count_max_value) {
//av_log(NULL, AV_LOG_ERROR, "%5d ", deshake->counts[x][y]);
if (deshake->counts[x][y] > count_max_value) {
t->vector.x = x - deshake->rx;
t->vector.y = y - deshake->ry;
count_max_value = counts[x][y];
count_max_value = deshake->counts[x][y];
}
}
//av_log(NULL, AV_LOG_ERROR, "\n");