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Workaround a limitation of swscaler that does not like too small width.

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(It begins to have a lots of "workarounds" :(
This commit is contained in:
Laurent Aimar 2008-07-28 00:02:44 +02:00
parent 84387c930d
commit 496977e364
1 changed files with 100 additions and 25 deletions
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125
modules/video_filter/swscale.c
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@ -93,6 +93,9 @@ struct filter_sys_t
struct SwsContext *ctxA;
picture_t *p_src_a;
picture_t *p_dst_a;
int i_extend_factor;
picture_t *p_src_e;
picture_t *p_dst_e;
};
static picture_t *Filter( filter_t *, picture_t * );
@ -106,9 +109,11 @@ static int GetParameters( int *pi_fmti, int *pi_fmto, bool *pb_has_a, int *pi_sw
static int GetSwsCpuMask(void);
/* FFmpeg point resize quality seems really bad, let our scale module do it
/* SwScaler point resize quality seems really bad, let our scale module do it
* (change it to true to try) */
#define ALLOW_YUVP (false)
/* SwScaler does not like too small picture */
#define MINIMUM_WIDTH (16)
/*****************************************************************************
* OpenScaler: probe the filter and return score
@ -172,6 +177,8 @@ static int OpenScaler( vlc_object_t *p_this )
p_sys->ctxA = NULL;
p_sys->p_src_a = NULL;
p_sys->p_dst_a = NULL;
p_sys->p_src_e = NULL;
p_sys->p_dst_e = NULL;
memset( &p_sys->fmt_in, 0, sizeof(p_sys->fmt_in) );
memset( &p_sys->fmt_out, 0, sizeof(p_sys->fmt_out) );
@ -310,15 +317,27 @@ static int Init( filter_t *p_filter )
msg_Err( p_filter, "format not supported" );
return VLC_EGENERIC;
}
if( p_fmti->i_width <= 0 || p_fmto->i_width <= 0 )
{
msg_Err( p_filter, "0 width not supported" );
return VLC_EGENERIC;
}
/* swscale does not like too small width */
p_sys->i_extend_factor = 1;
while( __MIN( p_fmti->i_width, p_fmto->i_width ) * p_sys->i_extend_factor < MINIMUM_WIDTH)
p_sys->i_extend_factor++;
const unsigned i_fmti_width = p_fmti->i_width * p_sys->i_extend_factor;
const unsigned i_fmto_width = p_fmto->i_width * p_sys->i_extend_factor;
for( int n = 0; n < (b_has_a ? 2 : 1); n++ )
{
const int i_fmti = n == 0 ? i_fmt_in : PIX_FMT_GRAY8;
const int i_fmto = n == 0 ? i_fmt_out : PIX_FMT_GRAY8;
struct SwsContext *ctx;
ctx = sws_getContext( p_fmti->i_width, p_fmti->i_height, i_fmti,
p_fmto->i_width, p_fmto->i_height, i_fmto,
ctx = sws_getContext( i_fmti_width, p_fmti->i_height, i_fmti,
i_fmto_width, p_fmto->i_height, i_fmto,
i_sws_flags | p_sys->i_cpu_mask,
p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
if( n == 0 )
@ -328,12 +347,21 @@ static int Init( filter_t *p_filter )
}
if( p_sys->ctxA )
{
p_sys->p_src_a = picture_New( VLC_FOURCC( 'G', 'R', 'E', 'Y' ), p_fmti->i_width, p_fmti->i_height, 0 );
p_sys->p_dst_a = picture_New( VLC_FOURCC( 'G', 'R', 'E', 'Y' ), p_fmto->i_width, p_fmto->i_height, 0 );
p_sys->p_src_a = picture_New( VLC_FOURCC( 'G', 'R', 'E', 'Y' ), i_fmti_width, p_fmti->i_height, 0 );
p_sys->p_dst_a = picture_New( VLC_FOURCC( 'G', 'R', 'E', 'Y' ), i_fmto_width, p_fmto->i_height, 0 );
}
if( p_sys->i_extend_factor != 1 )
{
p_sys->p_src_e = picture_New( p_fmti->i_chroma, i_fmti_width, p_fmti->i_height, 0 );
p_sys->p_dst_e = picture_New( p_fmto->i_chroma, i_fmto_width, p_fmto->i_height, 0 );
memset( p_sys->p_src_e->p[0].p_pixels, 0, p_sys->p_src_e->p[0].i_pitch * p_sys->p_src_e->p[0].i_lines );
memset( p_sys->p_dst_e->p[0].p_pixels, 0, p_sys->p_dst_e->p[0].i_pitch * p_sys->p_dst_e->p[0].i_lines );
}
if( !p_sys->ctx ||
( b_has_a && ( !p_sys->ctxA || !p_sys->p_src_a || !p_sys->p_dst_a ) ) )
( b_has_a && ( !p_sys->ctxA || !p_sys->p_src_a || !p_sys->p_dst_a ) ) ||
( p_sys->i_extend_factor != 1 && ( !p_sys->p_src_e || !p_sys->p_dst_e ) ) )
{
msg_Err( p_filter, "could not init SwScaler and/or allocate memory" );
Clean( p_filter );
@ -343,21 +371,28 @@ static int Init( filter_t *p_filter )
p_sys->fmt_in = *p_fmti;
p_sys->fmt_out = *p_fmto;
msg_Err( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
#if 0
msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s extend by %d",
p_fmti->i_width, p_fmti->i_height, (char *)&p_fmti->i_chroma,
p_fmto->i_width, p_fmto->i_height, (char *)&p_fmto->i_chroma );
p_fmto->i_width, p_fmto->i_height, (char *)&p_fmto->i_chroma,
p_sys->i_extend_factor );
#endif
return VLC_SUCCESS;
}
static void Clean( filter_t *p_filter )
{
filter_sys_t *p_sys = p_filter->p_sys;
if( p_sys->p_src_e )
picture_Release( p_sys->p_src_e );
if( p_sys->p_dst_e )
picture_Release( p_sys->p_dst_e );
if( p_sys->p_src_a )
picture_Release( p_sys->p_src_a );
if( p_sys->p_dst_a )
picture_Release( p_sys->p_dst_a );
if( p_sys->ctxA )
sws_freeContext( p_sys->ctxA );
@ -369,43 +404,67 @@ static void Clean( filter_t *p_filter )
p_sys->ctxA = NULL;
p_sys->p_src_a = NULL;
p_sys->p_dst_a = NULL;
p_sys->p_src_e = NULL;
p_sys->p_dst_e = NULL;
}
static void GetPixels( uint8_t *pp_pixel[3], int pi_pitch[3],
const picture_t *p_picture,
int i_plane_start, int i_plane_count )
{
for( int n = 0; n < __MIN(i_plane_count, p_picture->i_planes-i_plane_start ); n++ )
int n;
for( n = 0; n < __MIN(i_plane_count, p_picture->i_planes-i_plane_start ); n++ )
{
pp_pixel[n] = p_picture->p[i_plane_start+n].p_pixels;
pi_pitch[n] = p_picture->p[i_plane_start+n].i_pitch;
}
for( ; n < 3; n++ )
{
pp_pixel[n] = NULL;
pi_pitch[n] = 0;
}
}
/* XXX is it always 3 even for BIG_ENDIAN (blend.c seems to think so) ? */
#define OFFSET_A (3)
static void ExtractA( picture_t *p_dst, const picture_t *p_src, const video_format_t *p_fmt )
static void ExtractA( picture_t *p_dst, const picture_t *p_src, unsigned i_width, unsigned i_height )
{
plane_t *d = &p_dst->p[0];
const plane_t *s = &p_src->p[0];
for( unsigned y = 0; y < p_fmt->i_height; y++ )
for( unsigned x = 0; x < p_fmt->i_width; x++ )
for( unsigned y = 0; y < i_height; y++ )
for( unsigned x = 0; x < i_width; x++ )
d->p_pixels[y*d->i_pitch+x] = s->p_pixels[y*s->i_pitch+4*x+OFFSET_A];
}
static void InjectA( picture_t *p_dst, const picture_t *p_src, const video_format_t *p_fmt )
static void InjectA( picture_t *p_dst, const picture_t *p_src, unsigned i_width, unsigned i_height )
{
plane_t *d = &p_dst->p[0];
const plane_t *s = &p_src->p[0];
for( unsigned y = 0; y < p_fmt->i_height; y++ )
for( unsigned x = 0; x < p_fmt->i_width; x++ )
for( unsigned y = 0; y < i_height; y++ )
for( unsigned x = 0; x < i_width; x++ )
d->p_pixels[y*d->i_pitch+4*x+OFFSET_A] = s->p_pixels[y*s->i_pitch+x];
}
#undef OFFSET_A
static void CopyPad( picture_t *p_dst, const picture_t *p_src )
{
picture_Copy( p_dst, p_src );
for( int n = 0; n < p_dst->i_planes; n++ )
{
const plane_t *s = &p_src->p[n];
plane_t *d = &p_dst->p[n];
for( int y = 0; y < s->i_lines; y++ )
{
for( int x = s->i_visible_pitch; x < d->i_visible_pitch; x += s->i_pixel_pitch )
memcpy( &d->p_pixels[y*d->i_pitch + x], &d->p_pixels[y*d->i_pitch + s->i_visible_pitch - s->i_pixel_pitch], s->i_pixel_pitch );
}
}
}
static void Convert( struct SwsContext *ctx,
picture_t *p_dst, picture_t *p_src, const video_format_t *p_fmti, int i_plane_start, int i_plane_count )
picture_t *p_dst, picture_t *p_src, int i_height, int i_plane_start, int i_plane_count )
{
uint8_t *src[3]; int src_stride[3];
uint8_t *dst[3]; int dst_stride[3];
@ -414,10 +473,10 @@ static void Convert( struct SwsContext *ctx,
GetPixels( dst, dst_stride, p_dst, i_plane_start, i_plane_count );
#if LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)
sws_scale( ctx, src, src_stride, 0, p_fmti->i_height,
sws_scale( ctx, src, src_stride, 0, i_height,
dst, dst_stride );
#else
sws_scale_ordered( ctx, src, src_stride, 0, p_fmti->i_height,
sws_scale_ordered( ctx, src, src_stride, 0, i_height,
dst, dst_stride );
#endif
}
@ -449,24 +508,40 @@ static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
return NULL;
}
Convert( p_sys->ctx, p_pic_dst, p_pic, p_fmti, 0, 3 );
/* */
picture_t *p_src = p_pic;
picture_t *p_dst = p_pic_dst;
if( p_sys->i_extend_factor != 1 )
{
p_src = p_sys->p_src_e;
p_dst = p_sys->p_dst_e;
CopyPad( p_src, p_pic );
}
Convert( p_sys->ctx, p_dst, p_src, p_fmti->i_height, 0, 3 );
if( p_sys->ctxA )
{
if( p_fmto->i_chroma == VLC_FOURCC( 'R', 'G', 'B', 'A' ) )
{
/* We extract the A plane to rescale it, and then we reinject it. */
ExtractA( p_sys->p_src_a, p_pic, p_fmti );
ExtractA( p_sys->p_src_a, p_src, p_fmti->i_width * p_sys->i_extend_factor, p_fmti->i_height );
Convert( p_sys->ctxA, p_sys->p_dst_a, p_sys->p_src_a, p_fmti, 0, 1 );
Convert( p_sys->ctxA, p_sys->p_dst_a, p_sys->p_src_a, p_fmti->i_height, 0, 1 );
InjectA( p_pic_dst, p_sys->p_dst_a, p_fmto );
InjectA( p_dst, p_sys->p_dst_a, p_fmto->i_width * p_sys->i_extend_factor, p_fmto->i_height );
}
else
{
Convert( p_sys->ctxA, p_pic_dst, p_pic, p_fmti, 3, 1 );
Convert( p_sys->ctxA, p_dst, p_src, p_fmti->i_height, 3, 1 );
}
}
if( p_sys->i_extend_factor != 1 )
{
picture_CopyPixels( p_pic_dst, p_dst );
}
picture_CopyProperties( p_pic_dst, p_pic );
picture_Release( p_pic );
return p_pic_dst;