#include "video.h"
#define NAME "crop"
#define FAIL_IF_ERROR( cond, ... ) FAIL_IF_ERR( cond, NAME, __VA_ARGS__ )
cli_vid_filter_t crop_filter;
typedef struct
{
hnd_t prev_hnd;
cli_vid_filter_t prev_filter;
int dims[4];
const x264_cli_csp_t *csp;
} crop_hnd_t;
static void help( int longhelp )
{
printf( " "NAME":left,top,right,bottom\n" );
if( !longhelp )
return;
printf( " removes pixels from the edges of the frame\n" );
}
static int init( hnd_t *handle, cli_vid_filter_t *filter, video_info_t *info, x264_param_t *param, char *opt_string )
{
FAIL_IF_ERROR( x264_cli_csp_is_invalid( info->csp ), "invalid csp %d\n", info->csp )
crop_hnd_t *h = calloc( 1, sizeof(crop_hnd_t) );
if( !h )
return -1;
h->csp = x264_cli_get_csp( info->csp );
static const char *optlist[] = { "left", "top", "right", "bottom", NULL };
char **opts = x264_split_options( opt_string, optlist );
if( !opts )
return -1;
for( int i = 0; i < 4; i++ )
{
char *opt = x264_get_option( optlist[i], opts );
FAIL_IF_ERROR( !opt, "%s crop value not specified\n", optlist[i] )
h->dims[i] = x264_otoi( opt, -1 );
FAIL_IF_ERROR( h->dims[i] < 0, "%s crop value `%s' is less than 0\n", optlist[i], opt )
int dim_mod = i&1 ? (h->csp->mod_height << info->interlaced) : h->csp->mod_width;
FAIL_IF_ERROR( h->dims[i] % dim_mod, "%s crop value `%s' is not a multiple of %d\n", optlist[i], opt, dim_mod )
}
x264_free_string_array( opts );
h->dims[2] = info->width - h->dims[0] - h->dims[2];
h->dims[3] = info->height - h->dims[1] - h->dims[3];
FAIL_IF_ERROR( h->dims[2] <= 0 || h->dims[3] <= 0, "invalid output resolution %dx%d\n", h->dims[2], h->dims[3] )
if( info->width != h->dims[2] || info->height != h->dims[3] )
x264_cli_log( NAME, X264_LOG_INFO, "cropping to %dx%d\n", h->dims[2], h->dims[3] );
else
{
free( h );
return 0;
}
info->width = h->dims[2];
info->height = h->dims[3];
h->prev_filter = *filter;
h->prev_hnd = *handle;
*handle = h;
*filter = crop_filter;
return 0;
}
static int get_frame( hnd_t handle, cli_pic_t *output, int frame )
{
crop_hnd_t *h = handle;
if( h->prev_filter.get_frame( h->prev_hnd, output, frame ) )
return -1;
output->img.width = h->dims[2];
output->img.height = h->dims[3];
for( int i = 0; i < output->img.planes; i++ )
{
intptr_t offset = output->img.stride[i] * h->dims[1] * h->csp->height[i];
offset += h->dims[0] * h->csp->width[i] * x264_cli_csp_depth_factor( output->img.csp );
output->img.plane[i] += offset;
}
return 0;
}
static int release_frame( hnd_t handle, cli_pic_t *pic, int frame )
{
crop_hnd_t *h = handle;
return h->prev_filter.release_frame( h->prev_hnd, pic, frame );
}
static void free_filter( hnd_t handle )
{
crop_hnd_t *h = handle;
h->prev_filter.free( h->prev_hnd );
free( h );
}
cli_vid_filter_t crop_filter = { NAME, help, init, get_frame, release_frame, free_filter, NULL };