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FFmpeg/libavfilter/vf_yadif.c
Michael Niedermayer a0d15027e3 yadif: check input video size. 
yadif needs at least 3x3 or it will likely crash with out of array reads

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2012-08-10 00:09:34 +02:00

458 lines
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C
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/*
* Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
* 2010 James Darnley <james.darnley@gmail.com>
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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 "libavutil/avassert.h"
#include "libavutil/cpu.h"
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "yadif.h"
#undef NDEBUG
#include <assert.h>
#define CHECK(j)\
{ int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
+ FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
+ FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
if (score < spatial_score) {\
spatial_score= score;\
spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
#define FILTER \
for (x = 0; x < w; x++) { \
int c = cur[mrefs]; \
int d = (prev2[0] + next2[0])>>1; \
int e = cur[prefs]; \
int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
int diff = FFMAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2); \
int spatial_pred = (c+e)>>1; \
int spatial_score = FFABS(cur[mrefs-1] - cur[prefs-1]) + FFABS(c-e) \
+ FFABS(cur[mrefs+1] - cur[prefs+1]) - 1; \
\
CHECK(-1) CHECK(-2) }} }} \
CHECK( 1) CHECK( 2) }} }} \
\
if (mode < 2) { \
int b = (prev2[2*mrefs] + next2[2*mrefs])>>1; \
int f = (prev2[2*prefs] + next2[2*prefs])>>1; \
int max = FFMAX3(d-e, d-c, FFMIN(b-c, f-e)); \
int min = FFMIN3(d-e, d-c, FFMAX(b-c, f-e)); \
\
diff = FFMAX3(diff, min, -max); \
} \
\
if (spatial_pred > d + diff) \
spatial_pred = d + diff; \
else if (spatial_pred < d - diff) \
spatial_pred = d - diff; \
\
dst[0] = spatial_pred; \
\
dst++; \
cur++; \
prev++; \
next++; \
prev2++; \
next2++; \
}
static void filter_line_c(uint8_t *dst,
uint8_t *prev, uint8_t *cur, uint8_t *next,
int w, int prefs, int mrefs, int parity, int mode)
{
int x;
uint8_t *prev2 = parity ? prev : cur ;
uint8_t *next2 = parity ? cur : next;
FILTER
}
static void filter_line_c_16bit(uint16_t *dst,
uint16_t *prev, uint16_t *cur, uint16_t *next,
int w, int prefs, int mrefs, int parity, int mode)
{
int x;
uint16_t *prev2 = parity ? prev : cur ;
uint16_t *next2 = parity ? cur : next;
mrefs /= 2;
prefs /= 2;
FILTER
}
static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
int parity, int tff)
{
YADIFContext *yadif = ctx->priv;
int y, i;
for (i = 0; i < yadif->csp->nb_components; i++) {
int w = dstpic->video->w;
int h = dstpic->video->h;
int refs = yadif->cur->linesize[i];
int absrefs = FFABS(refs);
int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
if (i == 1 || i == 2) {
/* Why is this not part of the per-plane description thing? */
w >>= yadif->csp->log2_chroma_w;
h >>= yadif->csp->log2_chroma_h;
}
if(yadif->temp_line_size < absrefs) {
av_free(yadif->temp_line);
yadif->temp_line = av_mallocz(2*64 + 5*absrefs);
yadif->temp_line_size = absrefs;
}
for (y = 0; y < h; y++) {
if ((y ^ parity) & 1) {
uint8_t *prev = &yadif->prev->data[i][y*refs];
uint8_t *cur = &yadif->cur ->data[i][y*refs];
uint8_t *next = &yadif->next->data[i][y*refs];
uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
int mode = y==1 || y+2==h ? 2 : yadif->mode;
int prefs = y+1<h ? refs : -refs;
int mrefs = y ?-refs : refs;
if(y<=1 || y+2>=h) {
int j;
uint8_t *tmp = yadif->temp_line + 64 + 2*absrefs;
if(mode<2)
memcpy(tmp+2*mrefs, cur+2*mrefs, w*df);
memcpy(tmp+mrefs, cur+mrefs, w*df);
memcpy(tmp , cur , w*df);
if(prefs != mrefs) {
memcpy(tmp+prefs, cur+prefs, w*df);
if(mode<2)
memcpy(tmp+2*prefs, cur+2*prefs, w*df);
}
cur = tmp;
}
yadif->filter_line(dst, prev, cur, next, w, prefs, mrefs, parity ^ tff, mode);
} else {
memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
&yadif->cur->data[i][y*refs], w*df);
}
}
}
emms_c();
}
static int return_frame(AVFilterContext *ctx, int is_second)
{
YADIFContext *yadif = ctx->priv;
AVFilterLink *link= ctx->outputs[0];
int tff, ret;
if (yadif->parity == -1) {
tff = yadif->cur->video->interlaced ?
yadif->cur->video->top_field_first : 1;
} else {
tff = yadif->parity^1;
}
if (is_second) {
yadif->out = ff_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
AV_PERM_REUSE, link->w, link->h);
if (!yadif->out)
return AVERROR(ENOMEM);
avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
yadif->out->video->interlaced = 0;
}
if (!yadif->csp)
yadif->csp = &av_pix_fmt_descriptors[link->format];
if (yadif->csp->comp[0].depth_minus1 / 8 == 1)
yadif->filter_line = (void*)filter_line_c_16bit;
filter(ctx, yadif->out, tff ^ !is_second, tff);
if (is_second) {
int64_t cur_pts = yadif->cur->pts;
int64_t next_pts = yadif->next->pts;
if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
yadif->out->pts = cur_pts + next_pts;
} else {
yadif->out->pts = AV_NOPTS_VALUE;
}
ret = ff_start_frame(ctx->outputs[0], yadif->out);
if (ret < 0)
return ret;
}
if ((ret = ff_draw_slice(ctx->outputs[0], 0, link->h, 1)) < 0 ||
(ret = ff_end_frame(ctx->outputs[0])) < 0)
return ret;
yadif->frame_pending = (yadif->mode&1) && !is_second;
return 0;
}
static int start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
{
AVFilterContext *ctx = link->dst;
YADIFContext *yadif = ctx->priv;
av_assert0(picref);
if (picref->video->h < 3 || picref->video->w < 3) {
av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
return AVERROR(EINVAL);
}
if (yadif->frame_pending)
return_frame(ctx, 1);
if (yadif->prev)
avfilter_unref_buffer(yadif->prev);
yadif->prev = yadif->cur;
yadif->cur = yadif->next;
yadif->next = picref;
link->cur_buf = NULL;
if (!yadif->cur)
return 0;
if (yadif->auto_enable && !yadif->cur->video->interlaced) {
yadif->out = avfilter_ref_buffer(yadif->cur, AV_PERM_READ);
if (!yadif->out)
return AVERROR(ENOMEM);
avfilter_unref_bufferp(&yadif->prev);
if (yadif->out->pts != AV_NOPTS_VALUE)
yadif->out->pts *= 2;
return ff_start_frame(ctx->outputs[0], yadif->out);
}
if (!yadif->prev &&
!(yadif->prev = avfilter_ref_buffer(yadif->cur, AV_PERM_READ)))
return AVERROR(ENOMEM);
yadif->out = ff_get_video_buffer(ctx->outputs[0], AV_PERM_WRITE | AV_PERM_PRESERVE |
AV_PERM_REUSE, link->w, link->h);
if (!yadif->out)
return AVERROR(ENOMEM);
avfilter_copy_buffer_ref_props(yadif->out, yadif->cur);
yadif->out->video->interlaced = 0;
if (yadif->out->pts != AV_NOPTS_VALUE)
yadif->out->pts *= 2;
return ff_start_frame(ctx->outputs[0], yadif->out);
}
static int end_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->dst;
YADIFContext *yadif = ctx->priv;
if (!yadif->out)
return 0;
if (yadif->auto_enable && !yadif->cur->video->interlaced) {
int ret = ff_draw_slice(ctx->outputs[0], 0, link->h, 1);
if (ret >= 0)
ret = ff_end_frame(ctx->outputs[0]);
return ret;
}
return_frame(ctx, 0);
return 0;
}
static int request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
YADIFContext *yadif = ctx->priv;
if (yadif->frame_pending) {
return_frame(ctx, 1);
return 0;
}
do {
int ret;
if (yadif->eof)
return AVERROR_EOF;
ret = ff_request_frame(link->src->inputs[0]);
if (ret == AVERROR_EOF && yadif->cur) {
AVFilterBufferRef *next = avfilter_ref_buffer(yadif->next, AV_PERM_READ);
if (!next)
return AVERROR(ENOMEM);
next->pts = yadif->next->pts * 2 - yadif->cur->pts;
start_frame(link->src->inputs[0], next);
end_frame(link->src->inputs[0]);
yadif->eof = 1;
} else if (ret < 0) {
return ret;
}
} while (!yadif->cur);
return 0;
}
static int poll_frame(AVFilterLink *link)
{
YADIFContext *yadif = link->src->priv;
int ret, val;
if (yadif->frame_pending)
return 1;
val = ff_poll_frame(link->src->inputs[0]);
if (val <= 0)
return val;
if (val >= 1 && !yadif->next) { //FIXME change API to not requre this red tape
if ((ret = ff_request_frame(link->src->inputs[0])) < 0)
return ret;
val = ff_poll_frame(link->src->inputs[0]);
if (val <= 0)
return val;
}
assert(yadif->next || !val);
if (yadif->auto_enable && yadif->next && !yadif->next->video->interlaced)
return val;
return val * ((yadif->mode&1)+1);
}
static av_cold void uninit(AVFilterContext *ctx)
{
YADIFContext *yadif = ctx->priv;
if (yadif->prev) avfilter_unref_bufferp(&yadif->prev);
if (yadif->cur ) avfilter_unref_bufferp(&yadif->cur );
if (yadif->next) avfilter_unref_bufferp(&yadif->next);
av_freep(&yadif->temp_line); yadif->temp_line_size = 0;
}
static int query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
PIX_FMT_YUV420P,
PIX_FMT_YUV422P,
PIX_FMT_YUV444P,
PIX_FMT_YUV410P,
PIX_FMT_YUV411P,
PIX_FMT_GRAY8,
PIX_FMT_YUVJ420P,
PIX_FMT_YUVJ422P,
PIX_FMT_YUVJ444P,
AV_NE( PIX_FMT_GRAY16BE, PIX_FMT_GRAY16LE ),
PIX_FMT_YUV440P,
PIX_FMT_YUVJ440P,
AV_NE( PIX_FMT_YUV420P10BE, PIX_FMT_YUV420P10LE ),
AV_NE( PIX_FMT_YUV422P10BE, PIX_FMT_YUV422P10LE ),
AV_NE( PIX_FMT_YUV444P10BE, PIX_FMT_YUV444P10LE ),
AV_NE( PIX_FMT_YUV420P16BE, PIX_FMT_YUV420P16LE ),
AV_NE( PIX_FMT_YUV422P16BE, PIX_FMT_YUV422P16LE ),
AV_NE( PIX_FMT_YUV444P16BE, PIX_FMT_YUV444P16LE ),
PIX_FMT_YUVA420P,
PIX_FMT_YUVA422P,
PIX_FMT_YUVA444P,
PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static av_cold int init(AVFilterContext *ctx, const char *args)
{
YADIFContext *yadif = ctx->priv;
yadif->mode = 0;
yadif->parity = -1;
yadif->auto_enable = 0;
yadif->csp = NULL;
if (args) sscanf(args, "%d:%d:%d", &yadif->mode, &yadif->parity, &yadif->auto_enable);
yadif->filter_line = filter_line_c;
if (HAVE_MMX)
ff_yadif_init_x86(yadif);
av_log(ctx, AV_LOG_VERBOSE, "mode:%d parity:%d auto_enable:%d\n", yadif->mode, yadif->parity, yadif->auto_enable);
return 0;
}
static int null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
{
return 0;
}
static int config_props(AVFilterLink *link)
{
YADIFContext *yadif = link->src->priv;
link->time_base.num = link->src->inputs[0]->time_base.num;
link->time_base.den = link->src->inputs[0]->time_base.den * 2;
link->w = link->src->inputs[0]->w;
link->h = link->src->inputs[0]->h;
if(yadif->mode&1)
link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1});
return 0;
}
AVFilter avfilter_vf_yadif = {
.name = "yadif",
.description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
.priv_size = sizeof(YADIFContext),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.inputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.start_frame = start_frame,
.draw_slice = null_draw_slice,
.end_frame = end_frame,
.rej_perms = AV_PERM_REUSE2, },
{ .name = NULL}},
.outputs = (const AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.poll_frame = poll_frame,
.request_frame = request_frame,
.config_props = config_props, },
{ .name = NULL}},
};
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