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|
/*
Copyright (C) 2006 Michael Niedermayer <michaelni@gmx.at>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "hb.h"
#include "hbffmpeg.h"
#include "taskset.h"
// yadif_mode is a bit vector with the following flags
#define MODE_YADIF_ENABLE 1
#define MODE_YADIF_SPATIAL 2
#define MODE_YADIF_2PASS 4
#define MODE_YADIF_BOB 8
#define YADIF_MODE_DEFAULT 0
#define YADIF_PARITY_DEFAULT -1
#define ABS(a) ((a) > 0 ? (a) : (-(a)))
#define MIN3(a,b,c) MIN(MIN(a,b),c)
#define MAX3(a,b,c) MAX(MAX(a,b),c)
typedef struct yadif_arguments_s {
hb_buffer_t * dst;
int parity;
int tff;
} yadif_arguments_t;
typedef struct deint_arguments_s {
hb_buffer_t * src;
hb_buffer_t * dst;
} deint_arguments_t;
typedef struct deint_thread_arg_s {
hb_filter_private_t *pv;
int segment;
} deint_thread_arg_t;
struct hb_filter_private_s
{
int width;
int height;
int yadif_mode;
int yadif_parity;
int yadif_ready;
hb_buffer_t * yadif_ref[3];
int cpu_count;
int segments;
int deint_nsegs;
taskset_t deint_taskset; // Threads for fast deint
taskset_t yadif_taskset; // Threads for Yadif
deint_arguments_t *deint_arguments; // Arguments to thread for work
yadif_arguments_t *yadif_arguments; // Arguments to thread for work
};
static int hb_deinterlace_init( hb_filter_object_t * filter,
hb_filter_init_t * init );
static int hb_deinterlace_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static void hb_deinterlace_close( hb_filter_object_t * filter );
hb_filter_object_t hb_filter_deinterlace =
{
.id = HB_FILTER_DEINTERLACE,
.enforce_order = 1,
.name = "Deinterlace",
.settings = NULL,
.init = hb_deinterlace_init,
.work = hb_deinterlace_work,
.close = hb_deinterlace_close,
};
static void yadif_store_ref(hb_filter_private_t *pv, hb_buffer_t *b)
{
hb_buffer_close(&pv->yadif_ref[0]);
memmove(&pv->yadif_ref[0], &pv->yadif_ref[1], sizeof(hb_buffer_t *) * 2 );
pv->yadif_ref[2] = b;
}
static void yadif_filter_line(
hb_filter_private_t * pv,
uint8_t * dst,
uint8_t * prev,
uint8_t * cur,
uint8_t * next,
int width,
int stride,
int parity)
{
uint8_t *prev2 = parity ? prev : cur ;
uint8_t *next2 = parity ? cur : next;
int x;
for( x = 0; x < width; x++)
{
int c = cur[-stride];
int d = (prev2[0] + next2[0])>>1;
int e = cur[+stride];
int temporal_diff0 = ABS(prev2[0] - next2[0]);
int temporal_diff1 = ( ABS(prev[-stride] - c) + ABS(prev[+stride] - e) ) >> 1;
int temporal_diff2 = ( ABS(next[-stride] - c) + ABS(next[+stride] - e) ) >> 1;
int diff = MAX3(temporal_diff0>>1, temporal_diff1, temporal_diff2);
int spatial_pred = (c+e)>>1;
int spatial_score = ABS(cur[-stride-1] - cur[+stride-1]) + ABS(c-e) +
ABS(cur[-stride+1] - cur[+stride+1]) - 1;
#define YADIF_CHECK(j)\
{ int score = ABS(cur[-stride-1+j] - cur[+stride-1-j])\
+ ABS(cur[-stride +j] - cur[+stride -j])\
+ ABS(cur[-stride+1+j] - cur[+stride+1-j]);\
if( score < spatial_score ){\
spatial_score = score;\
spatial_pred = (cur[-stride +j] + cur[+stride -j])>>1;\
YADIF_CHECK(-1) YADIF_CHECK(-2) }} }}
YADIF_CHECK( 1) YADIF_CHECK( 2) }} }}
if( pv->yadif_mode & MODE_YADIF_SPATIAL )
{
int b = (prev2[-2*stride] + next2[-2*stride])>>1;
int f = (prev2[+2*stride] + next2[+2*stride])>>1;
int max = MAX3(d-e, d-c, MIN(b-c, f-e));
int min = MIN3(d-e, d-c, MAX(b-c, f-e));
diff = MAX3( 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++;
}
}
typedef struct yadif_thread_arg_s {
hb_filter_private_t *pv;
int segment;
} yadif_thread_arg_t;
/*
* deinterlace this segment of all three planes in a single thread.
*/
void yadif_filter_thread( void *thread_args_v )
{
yadif_arguments_t *yadif_work = NULL;
hb_filter_private_t * pv;
int run = 1;
int segment, segment_start, segment_stop;
yadif_thread_arg_t *thread_args = thread_args_v;
pv = thread_args->pv;
segment = thread_args->segment;
hb_log("Yadif Deinterlace thread started for segment %d", segment);
while( run )
{
/*
* Wait here until there is work to do.
*/
taskset_thread_wait4start( &pv->yadif_taskset, segment );
if( taskset_thread_stop( &pv->yadif_taskset, segment ) )
{
/*
* No more work to do, exit this thread.
*/
run = 0;
goto report_completion;
}
yadif_work = &pv->yadif_arguments[segment];
if( yadif_work->dst == NULL )
{
hb_error( "Thread started when no work available" );
goto report_completion;
}
/*
* Process all three planes, but only this segment of it.
*/
int pp;
for(pp = 0; pp < 3; pp++)
{
hb_buffer_t *dst = yadif_work->dst;
int w = dst->plane[pp].width;
int s = dst->plane[pp].stride;
int h = dst->plane[pp].height;
int yy;
int parity = yadif_work->parity;
int tff = yadif_work->tff;
int penultimate = h - 2;
int segment_height = (h / pv->segments) & ~1;
segment_start = segment_height * segment;
if( segment == pv->segments - 1 )
{
/*
* Final segment
*/
segment_stop = h;
} else {
segment_stop = segment_height * ( segment + 1 );
}
uint8_t *dst2 = &dst->plane[pp].data[segment_start * s];
uint8_t *prev = &pv->yadif_ref[0]->plane[pp].data[segment_start * s];
uint8_t *cur = &pv->yadif_ref[1]->plane[pp].data[segment_start * s];
uint8_t *next = &pv->yadif_ref[2]->plane[pp].data[segment_start * s];
for( yy = segment_start; yy < segment_stop; yy++ )
{
if(((yy ^ parity) & 1))
{
/* This is the bottom field when TFF and vice-versa.
It's the field that gets filtered. Because yadif
needs 2 lines above and below the one being filtered,
we need to mirror the edges. When TFF, this means
replacing the 2nd line with a copy of the 1st,
and the last with the second-to-last. */
if( yy > 1 && yy < penultimate )
{
/* This isn't the top or bottom,
* proceed as normal to yadif. */
yadif_filter_line(pv, dst2, prev, cur, next, w, s,
parity ^ tff);
}
else
{
// parity == 0 (TFF), y1 = y0
// parity == 1 (BFF), y0 = y1
// parity == 0 (TFF), yu = yp
// parity == 1 (BFF), yp = yu
uint8_t *src = &pv->yadif_ref[1]->plane[pp].data[(yy^parity)*s];
memcpy(dst2, src, w);
}
}
else
{
/* Preserve this field unfiltered */
memcpy(dst2, cur, w);
}
dst2 += s;
prev += s;
cur += s;
next += s;
}
}
report_completion:
/*
* Finished this segment, let everyone know.
*/
taskset_thread_complete( &pv->yadif_taskset, segment );
}
}
/*
* threaded yadif - each thread deinterlaces a single segment of all
* three planes. Where a segment is defined as the frame divided by
* the number of CPUs.
*
* This function blocks until the frame is deinterlaced.
*/
static void yadif_filter( hb_filter_private_t * pv,
hb_buffer_t * dst, int parity, int tff)
{
int segment;
for( segment = 0; segment < pv->segments; segment++ )
{
/*
* Setup the work for this plane.
*/
pv->yadif_arguments[segment].parity = parity;
pv->yadif_arguments[segment].tff = tff;
pv->yadif_arguments[segment].dst = dst;
}
/* Allow the taskset threads to make one pass over the data. */
taskset_cycle( &pv->yadif_taskset );
/*
* Entire frame is now deinterlaced.
*/
}
/*
* deinterlace a frame in a single thread.
*/
void deint_filter_thread( void *thread_args_v )
{
deint_arguments_t *args = NULL;
hb_filter_private_t * pv;
int run = 1;
int segment;
deint_thread_arg_t *thread_args = thread_args_v;
pv = thread_args->pv;
segment = thread_args->segment;
hb_log("Fast Deinterlace thread started for segment %d", segment);
while( run )
{
/*
* Wait here until there is work to do.
*/
taskset_thread_wait4start( &pv->deint_taskset, segment );
if( taskset_thread_stop( &pv->deint_taskset, segment ) )
{
/*
* No more work to do, exit this thread.
*/
run = 0;
goto report_completion;
}
args = &pv->deint_arguments[segment];
if( args->dst == NULL )
{
// This can happen when flushing final buffers.
goto report_completion;
}
/*
* Process all three planes, but only this segment of it.
*/
hb_deinterlace(args->dst, args->src);
report_completion:
/*
* Finished this segment, let everyone know.
*/
taskset_thread_complete( &pv->deint_taskset, segment );
}
}
/*
* threaded fast deint - each thread deinterlaces a single frame.
*
* This function blocks until all frames are deinterlaced.
*/
static hb_buffer_t * deint_fast(hb_filter_private_t * pv, hb_buffer_t * in)
{
int ii;
hb_buffer_t *dst, *src;
if (in != NULL)
{
dst = hb_frame_buffer_init(in->f.fmt, in->f.width, in->f.height);
pv->deint_arguments[pv->deint_nsegs].src = in;
pv->deint_arguments[pv->deint_nsegs].dst = dst;
pv->deint_nsegs++;
}
if (in != NULL && pv->deint_nsegs < pv->segments)
{
return NULL;
}
if (pv->deint_nsegs > 0)
{
/* Allow the taskset threads to make one pass over the data. */
taskset_cycle( &pv->deint_taskset );
}
hb_buffer_t *first = NULL, *last = NULL;
for (ii = 0; ii < pv->deint_nsegs; ii++)
{
src = pv->deint_arguments[ii].src;
dst = pv->deint_arguments[ii].dst;
pv->deint_arguments[ii].src = NULL;
pv->deint_arguments[ii].dst = NULL;
if (first == NULL)
{
first = dst;
}
if (last != NULL)
{
last->next = dst;
}
last = dst;
dst->s = src->s;
hb_buffer_move_subs(dst, src);
hb_buffer_close(&src);
}
if (in == NULL)
{
// Flushing final buffers. Append EOS marker buffer.
dst = hb_buffer_eof_init();
if (first == NULL)
{
first = dst;
}
else
{
last->next = dst;
}
}
pv->deint_nsegs = 0;
return first;
}
static int hb_deinterlace_init( hb_filter_object_t * filter,
hb_filter_init_t * init )
{
filter->private_data = calloc( 1, sizeof(struct hb_filter_private_s) );
hb_filter_private_t * pv = filter->private_data;
pv->width = init->geometry.width;
pv->height = init->geometry.height;
pv->yadif_ready = 0;
pv->yadif_mode = YADIF_MODE_DEFAULT;
pv->yadif_parity = YADIF_PARITY_DEFAULT;
if( filter->settings )
{
sscanf( filter->settings, "%d:%d",
&pv->yadif_mode,
&pv->yadif_parity);
}
pv->cpu_count = hb_get_cpu_count();
/* Allocate yadif specific buffers */
if( pv->yadif_mode & MODE_YADIF_ENABLE )
{
/*
* Setup yadif taskset.
*/
pv->segments = pv->cpu_count;
pv->yadif_arguments = malloc( sizeof( yadif_arguments_t ) * pv->segments );
if( pv->yadif_arguments == NULL ||
taskset_init( &pv->yadif_taskset, /*thread_count*/pv->segments,
sizeof( yadif_thread_arg_t ) ) == 0 )
{
hb_error( "yadif could not initialize taskset" );
}
int ii;
for( ii = 0; ii < pv->segments; ii++ )
{
yadif_thread_arg_t *thread_args;
thread_args = taskset_thread_args( &pv->yadif_taskset, ii );
thread_args->pv = pv;
thread_args->segment = ii;
pv->yadif_arguments[ii].dst = NULL;
if( taskset_thread_spawn( &pv->yadif_taskset, ii,
"yadif_filter_segment",
yadif_filter_thread,
HB_NORMAL_PRIORITY ) == 0 )
{
hb_error( "yadif could not spawn thread" );
}
}
}
else
{
/*
* Setup fast deint taskset.
*/
pv->segments = pv->cpu_count;
pv->deint_arguments = malloc( sizeof( deint_arguments_t ) * pv->segments );
if( pv->deint_arguments == NULL ||
taskset_init( &pv->deint_taskset, pv->segments,
sizeof( deint_thread_arg_t ) ) == 0 )
{
hb_error( "deint could not initialize taskset" );
}
int ii;
for( ii = 0; ii < pv->segments; ii++ )
{
deint_thread_arg_t *thread_args;
thread_args = taskset_thread_args( &pv->deint_taskset, ii );
thread_args->pv = pv;
thread_args->segment = ii;
pv->deint_arguments[ii].dst = NULL;
if( taskset_thread_spawn( &pv->deint_taskset, ii,
"deint_filter_segment",
deint_filter_thread,
HB_NORMAL_PRIORITY ) == 0 )
{
hb_error( "deint could not spawn thread" );
}
}
}
return 0;
}
static void hb_deinterlace_close( hb_filter_object_t * filter )
{
hb_filter_private_t * pv = filter->private_data;
if( !pv )
{
return;
}
/* Cleanup yadif specific buffers */
if( pv->yadif_mode & MODE_YADIF_ENABLE )
{
taskset_fini( &pv->yadif_taskset );
int ii;
for(ii = 0; ii < 3; ii++)
{
hb_buffer_close(&pv->yadif_ref[ii]);
}
free( pv->yadif_arguments );
}
else
{
taskset_fini( &pv->deint_taskset );
free( pv->deint_arguments );
}
free( pv );
filter->private_data = NULL;
}
static int hb_deinterlace_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_filter_private_t * pv = filter->private_data;
hb_buffer_t * in = *buf_in;
hb_buffer_t * last = NULL, * out = NULL;
if (in->s.flags & HB_BUF_FLAG_EOF)
{
*buf_out = in;
*buf_in = NULL;
if( !( pv->yadif_mode & MODE_YADIF_ENABLE ) )
{
// Flush final frames
*buf_out = deint_fast(pv, NULL);
}
return HB_FILTER_DONE;
}
/* Use libavcodec deinterlace if yadif_mode < 0 */
if( !( pv->yadif_mode & MODE_YADIF_ENABLE ) )
{
*buf_in = NULL;
*buf_out = deint_fast(pv, in);
return HB_FILTER_OK;
}
/* Store current frame in yadif cache */
*buf_in = NULL;
yadif_store_ref(pv, in);
// yadif requires 3 buffers, prev, cur, and next. For the first
// frame, there can be no prev, so we duplicate the first frame.
if (!pv->yadif_ready)
{
// If yadif is not ready, store another ref and return HB_FILTER_DELAY
yadif_store_ref(pv, hb_buffer_dup(in));
pv->yadif_ready = 1;
// Wait for next
return HB_FILTER_DELAY;
}
/* Determine if top-field first layout */
int tff;
if( pv->yadif_parity < 0 )
{
tff = !!(in->s.flags & PIC_FLAG_TOP_FIELD_FIRST);
}
else
{
tff = (pv->yadif_parity & 1) ^ 1;
}
/* deinterlace both fields if yadif 2 pass or bob */
int frame, num_frames = 1;
if ((pv->yadif_mode & MODE_YADIF_2PASS) ||
(pv->yadif_mode & MODE_YADIF_BOB))
{
num_frames = 2;
}
// Will need up to 2 buffers simultaneously
int idx = 0;
hb_buffer_t * o_buf[2] = {NULL,};
/* Perform yadif filtering */
for( frame = 0; frame < num_frames; frame++ )
{
int parity = frame ^ tff ^ 1;
if (o_buf[idx] == NULL)
{
o_buf[idx] = hb_frame_buffer_init(in->f.fmt, in->f.width, in->f.height);
}
yadif_filter(pv, o_buf[idx], parity, tff);
// If bob, add both frames
// else, add only final frame
if (( pv->yadif_mode & MODE_YADIF_BOB ) || frame == num_frames - 1)
{
if ( out == NULL )
{
last = out = o_buf[idx];
}
else
{
last->next = o_buf[idx];
last = last->next;
}
last->next = NULL;
// Indicate that buffer was consumed
o_buf[idx] = NULL;
/* Copy buffered settings to output buffer settings */
last->s = pv->yadif_ref[1]->s;
idx ^= 1;
}
}
// Copy subs only to first output buffer
hb_buffer_move_subs( out, pv->yadif_ref[1] );
hb_buffer_close(&o_buf[0]);
hb_buffer_close(&o_buf[1]);
/* if bob mode is engaged, halve the duration of the
* timestamps. */
if (pv->yadif_mode & MODE_YADIF_BOB)
{
out->s.stop -= (out->s.stop - out->s.start) / 2LL;
last->s.start = out->s.stop;
last->s.new_chap = 0;
}
*buf_out = out;
return HB_FILTER_OK;
}
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