vf_rotate.c File Reference

rotation filter, partially based on the tests/rotozoom.c program More...

#include "libavutil/avstring.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "drawutils.h"
#include "internal.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	RotContext
struct	ThreadData

Macros
#define	OFFSET(x)   offsetof(RotContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	SET_SIZE_EXPR(name, opt_name)
#define	FIXP   (1<<16)
#define	INT_PI   205887
#define	TS2T(ts, tb)   ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb))

Enumerations
enum	var_name {   VAR_CH, VAR_N, VAR_NB_IN_CHANNELS, VAR_NB_OUT_CHANNELS,   VAR_T, VAR_S, VAR_VARS_NB, VAR_B1,   VAR_B2, VAR_S1, VAR_S2, VAR_T1,   VAR_T2, VAR_NB, VAR_TB, VAR_PTS,   VAR_START_PTS, VAR_PREV_PTS, VAR_PREV_SELECTED_PTS, VAR_T,   VAR_START_T, VAR_PREV_T, VAR_PREV_SELECTED_T, VAR_PICT_TYPE,   VAR_I, VAR_P, VAR_B, VAR_S,   VAR_SI, VAR_SP, VAR_BI, VAR_PICT_TYPE_I,   VAR_PICT_TYPE_P, VAR_PICT_TYPE_B, VAR_PICT_TYPE_S, VAR_PICT_TYPE_SI,   VAR_PICT_TYPE_SP, VAR_PICT_TYPE_BI, VAR_INTERLACE_TYPE, VAR_INTERLACE_TYPE_P,   VAR_INTERLACE_TYPE_T, VAR_INTERLACE_TYPE_B, VAR_CONSUMED_SAMPLES_N, VAR_SAMPLES_N,   VAR_SAMPLE_RATE, VAR_N, VAR_SELECTED_N, VAR_PREV_SELECTED_N,   VAR_KEY, VAR_POS, VAR_SCENE, VAR_VARS_NB,   VAR_AVTB, VAR_INTB, VAR_SR, VAR_VARS_NB,   VAR_FRAME_RATE, VAR_INTERLACED, VAR_N, VAR_NB_CONSUMED_SAMPLES,   VAR_NB_SAMPLES, VAR_POS, VAR_PREV_INPTS, VAR_PREV_INT,   VAR_PREV_OUTPTS, VAR_PREV_OUTT, VAR_PTS, VAR_SAMPLE_RATE,   VAR_STARTPTS, VAR_STARTT, VAR_T, VAR_TB,   VAR_RTCTIME, VAR_RTCSTART, VAR_S, VAR_SR,   VAR_VARS_NB, VAR_W, VAR_H, VAR_A,   VAR_DAR, VAR_SAR, VAR_HSUB, VAR_VSUB,   VARS_NB, VAR_W, VAR_H, VAR_CW,   VAR_CH, VAR_HSUB, VAR_VSUB, VARS_NB,   VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH,   VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH,   VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB,   VAR_VSUB, VAR_X, VAR_Y, VAR_N,   VAR_POS, VAR_T, VAR_VARS_NB, VAR_DAR,   VAR_HSUB, VAR_VSUB, VAR_IN_H, VAR_IH,   VAR_IN_W, VAR_IW, VAR_SAR, VAR_X,   VAR_Y, VAR_H, VAR_W, VAR_T,   VARS_NB, VAR_DAR, VAR_HSUB, VAR_VSUB,   VAR_LINE_H, VAR_LH, VAR_MAIN_H, VAR_h,   VAR_H, VAR_MAIN_W, VAR_w, VAR_W,   VAR_MAX_GLYPH_A, VAR_ASCENT, VAR_MAX_GLYPH_D, VAR_DESCENT,   VAR_MAX_GLYPH_H, VAR_MAX_GLYPH_W, VAR_N, VAR_SAR,   VAR_T, VAR_TEXT_H, VAR_TH, VAR_TEXT_W,   VAR_TW, VAR_X, VAR_Y, VAR_PICT_TYPE,   VAR_VARS_NB, VAR_N, VAR_PTS, VAR_R,   VAR_T, VAR_TB, VAR_NB, VAR_W,   VAR_H, VAR_VAL, VAR_MAXVAL, VAR_MINVAL,   VAR_NEGVAL, VAR_CLIPVAL, VAR_VARS_NB, VAR_MAIN_W,   VAR_MW, VAR_MAIN_H, VAR_MH, VAR_OVERLAY_W,   VAR_OW, VAR_OVERLAY_H, VAR_OH, VAR_HSUB,   VAR_VSUB, VAR_X, VAR_Y, VAR_N,   VAR_POS, VAR_T, VAR_VARS_NB, VAR_IN_W,   VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W,   VAR_OW, VAR_OUT_H, VAR_OH, VAR_X,   VAR_Y, VAR_A, VAR_SAR, VAR_DAR,   VAR_HSUB, VAR_VSUB, VARS_NB, VAR_IN_W,   VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W,   VAR_OW, VAR_OUT_H, VAR_OH, VAR_HSUB,   VAR_VSUB, VAR_N, VAR_T, VAR_VARS_NB,   VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH,   VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH,   VAR_A, VAR_SAR, VAR_DAR, VAR_HSUB,   VAR_VSUB, VAR_OHSUB, VAR_OVSUB, VARS_NB,   VAR_W, VAR_H, VAR_N, VAR_PTS,   VAR_R, VAR_T, VAR_TB, VAR_NB,   VAR_X, VAR_Y, VAR_W, VAR_H,   VAR_TIME, VAR_SPEED, VAR_TEMPO, VAR_ORDER,   VAR_PATTERN, VAR_ROW, VAR_VARS_NB }

Functions
	AVFILTER_DEFINE_CLASS (rotate)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	query_formats (AVFilterContext *ctx)
static double	get_rotated_w (void *opaque, double angle)
static double	get_rotated_h (void *opaque, double angle)
static int	config_props (AVFilterLink *outlink)
static int64_t	int_sin (int64_t a)
	Compute the sin of a using integer values.
static uint8_t *	interpolate_bilinear (uint8_t *dst_color, const uint8_t *src, int src_linesize, int src_linestep, int x, int y, int max_x, int max_y)
	Interpolate the color in src at position x and y using bilinear interpolation.
static int	filter_slice (AVFilterContext *ctx, void *arg, int job, int nb_jobs)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)
static int	process_command (AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)

Variables
static const char *	var_names []
static const AVOption	rotate_options []
static double(*const	func1 [])(void *, double)
static const char *const	func1_names []
static const AVFilterPad	rotate_inputs []
static const AVFilterPad	rotate_outputs []
AVFilter	ff_vf_rotate

Detailed Description

rotation filter, partially based on the tests/rotozoom.c program

Definition in file vf_rotate.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(RotContext, x)

Definition at line 90 of file vf_rotate.c.

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 91 of file vf_rotate.c.

#define SET_SIZE_EXPR	(		name,
			opt_name
	)

Value:

do {                                         \
    ret = av_expr_parse_and_eval(&res, expr = rot->name##_expr_str,                \
                                 var_names, rot->var_values,                       \
                                 func1_names, func1, NULL, NULL, rot, 0, ctx);     \
    if (ret < 0 || isnan(res) || isinf(res) || res <= 0) {                         \
        av_log(ctx, AV_LOG_ERROR,                                                  \
               "Error parsing or evaluating expression for option %s: "            \
               "invalid expression '%s' or non-positive or indefinite value %f\n", \
               opt_name, expr, res);                                               \
        return ret;                                                                \
    }                                                                              \
} while (0)

Referenced by config_props().

#define FIXP   (1<<16)

Definition at line 254 of file vf_rotate.c.

Referenced by filter_frame(), filter_slice(), and int_sin().

#define INT_PI   205887

Definition at line 255 of file vf_rotate.c.

Referenced by filter_frame(), and int_sin().

#define TS2T	(		ts,
			tb
	)		((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb))

Definition at line 310 of file vf_rotate.c.

Referenced by filter_frame().

Enumeration Type Documentation

enum var_name

Enumerator:

VAR_CH
VAR_N
VAR_NB_IN_CHANNELS
VAR_NB_OUT_CHANNELS
VAR_T
VAR_S
VAR_VARS_NB
VAR_B1
VAR_B2
VAR_S1
VAR_S2
VAR_T1
VAR_T2
VAR_NB
VAR_TB
VAR_PTS
VAR_START_PTS
VAR_PREV_PTS
VAR_PREV_SELECTED_PTS
VAR_T
VAR_START_T
VAR_PREV_T
VAR_PREV_SELECTED_T
VAR_PICT_TYPE
VAR_I
VAR_P
VAR_B
VAR_S
VAR_SI
VAR_SP
VAR_BI
VAR_PICT_TYPE_I
VAR_PICT_TYPE_P
VAR_PICT_TYPE_B
VAR_PICT_TYPE_S
VAR_PICT_TYPE_SI
VAR_PICT_TYPE_SP
VAR_PICT_TYPE_BI
VAR_INTERLACE_TYPE
VAR_INTERLACE_TYPE_P
VAR_INTERLACE_TYPE_T
VAR_INTERLACE_TYPE_B
VAR_CONSUMED_SAMPLES_N
VAR_SAMPLES_N
VAR_SAMPLE_RATE
VAR_N
VAR_SELECTED_N
VAR_PREV_SELECTED_N
VAR_KEY
VAR_POS
VAR_SCENE
VAR_VARS_NB
VAR_AVTB
VAR_INTB
VAR_SR
VAR_VARS_NB
VAR_FRAME_RATE
VAR_INTERLACED
VAR_N
VAR_NB_CONSUMED_SAMPLES
VAR_NB_SAMPLES
VAR_POS
VAR_PREV_INPTS
VAR_PREV_INT
VAR_PREV_OUTPTS
VAR_PREV_OUTT
VAR_PTS
VAR_SAMPLE_RATE
VAR_STARTPTS
VAR_STARTT
VAR_T
VAR_TB
VAR_RTCTIME
VAR_RTCSTART
VAR_S
VAR_SR
VAR_VARS_NB
VAR_W
VAR_H
VAR_A
VAR_DAR
VAR_SAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_W
VAR_H
VAR_CW
VAR_CH
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_POS
VAR_T
VAR_VARS_NB
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_IN_H
VAR_IH
VAR_IN_W
VAR_IW
VAR_SAR
VAR_X
VAR_Y
VAR_H
VAR_W
VAR_T
VARS_NB
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_LINE_H
VAR_LH
VAR_MAIN_H
VAR_h
VAR_H
VAR_MAIN_W
VAR_w
VAR_W
VAR_MAX_GLYPH_A
VAR_ASCENT
VAR_MAX_GLYPH_D
VAR_DESCENT
VAR_MAX_GLYPH_H
VAR_MAX_GLYPH_W
VAR_N
VAR_SAR
VAR_T
VAR_TEXT_H
VAR_TH
VAR_TEXT_W
VAR_TW
VAR_X
VAR_Y
VAR_PICT_TYPE
VAR_VARS_NB
VAR_N
VAR_PTS
VAR_R
VAR_T
VAR_TB
VAR_NB
VAR_W
VAR_H
VAR_VAL
VAR_MAXVAL
VAR_MINVAL
VAR_NEGVAL
VAR_CLIPVAL
VAR_VARS_NB
VAR_MAIN_W
VAR_MW
VAR_MAIN_H
VAR_MH
VAR_OVERLAY_W
VAR_OW
VAR_OVERLAY_H
VAR_OH
VAR_HSUB
VAR_VSUB
VAR_X
VAR_Y
VAR_N
VAR_POS
VAR_T
VAR_VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_X
VAR_Y
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_HSUB
VAR_VSUB
VAR_N
VAR_T
VAR_VARS_NB
VAR_IN_W
VAR_IW
VAR_IN_H
VAR_IH
VAR_OUT_W
VAR_OW
VAR_OUT_H
VAR_OH
VAR_A
VAR_SAR
VAR_DAR
VAR_HSUB
VAR_VSUB
VAR_OHSUB
VAR_OVSUB
VARS_NB
VAR_W
VAR_H
VAR_N
VAR_PTS
VAR_R
VAR_T
VAR_TB
VAR_NB
VAR_X
VAR_Y
VAR_W
VAR_H
VAR_TIME
VAR_SPEED
VAR_TEMPO
VAR_ORDER
VAR_PATTERN
VAR_ROW
VAR_VARS_NB

Definition at line 50 of file vf_rotate.c.

Function Documentation

AVFILTER_DEFINE_CLASS

(

rotate

)

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 108 of file vf_rotate.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 121 of file vf_rotate.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 129 of file vf_rotate.c.

static double get_rotated_w ( void *  opaque, double  angle  )

static

Definition at line 150 of file vf_rotate.c.

static double get_rotated_h ( void *  opaque, double  angle  )

static

Definition at line 162 of file vf_rotate.c.

static int config_props ( AVFilterLink *  outlink )

static

Definition at line 186 of file vf_rotate.c.

static int64_t int_sin ( int64_t  a )

static

Compute the sin of a using integer values.

Input and output values are scaled by FIXP.

Definition at line 261 of file vf_rotate.c.

Referenced by filter_frame().

static uint8_t* interpolate_bilinear ( uint8_t *  dst_color, const uint8_t *  src, int  src_linesize, int  src_linestep, int  x, int  y, int  max_x, int  max_y  )

static

Interpolate the color in src at position x and y using bilinear interpolation.

Definition at line 284 of file vf_rotate.c.

Referenced by avfilter_transform(), and filter_slice().

static int filter_slice ( AVFilterContext *  ctx, void *  arg, int  job, int  nb_jobs  )

static

Definition at line 312 of file vf_rotate.c.

Referenced by filter_frame().

static int filter_frame ( AVFilterLink *  inlink, AVFrame *  in  )

static

Definition at line 382 of file vf_rotate.c.

static int process_command ( AVFilterContext *  ctx, const char *  cmd, const char *  args, char *  res, int  res_len, int  flags  )

static

Definition at line 436 of file vf_rotate.c.

Variable Documentation

const char* var_names[]

static

Initial value:

= {
    "in_w" , "iw",  
    "in_h" , "ih",  
    "out_w", "ow",  
    "out_h", "oh",  
    "hsub", "vsub",
    "n",            
    "t",            
    NULL
}

Definition at line 39 of file vf_rotate.c.

Referenced by config_props(), and process_command().

const AVOption rotate_options[]

static

Initial value:

= {
    { "angle",     "set angle (in radians)",       OFFSET(angle_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "a",         "set angle (in radians)",       OFFSET(angle_expr_str), AV_OPT_TYPE_STRING, {.str="0"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "out_w",     "set output width expression",  OFFSET(outw_expr_str), AV_OPT_TYPE_STRING, {.str="iw"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "ow",        "set output width expression",  OFFSET(outw_expr_str), AV_OPT_TYPE_STRING, {.str="iw"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "out_h",     "set output height expression", OFFSET(outh_expr_str), AV_OPT_TYPE_STRING, {.str="ih"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "oh",        "set output height expression", OFFSET(outh_expr_str), AV_OPT_TYPE_STRING, {.str="ih"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "fillcolor", "set background fill color",    OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "c",         "set background fill color",    OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, CHAR_MIN, CHAR_MAX, .flags=FLAGS },
    { "bilinear",  "use bilinear interpolation",   OFFSET(use_bilinear),  AV_OPT_TYPE_INT, {.i64=1}, 0, 1, .flags=FLAGS },
    { NULL }
}

Definition at line 93 of file vf_rotate.c.

double(* const func1[])(void *, double)

static

Initial value:

= {
    get_rotated_w,
    get_rotated_h,
    NULL
}

Definition at line 174 of file vf_rotate.c.

Referenced by config_props(), ff_rate_control_init(), and parse_channel_expressions().

const char* const func1_names[]

static

Initial value:

= {
    "rotw",
    "roth",
    NULL
}

Definition at line 180 of file vf_rotate.c.

Referenced by av_expr_parse(), config_props(), ff_rate_control_init(), and parse_channel_expressions().

const AVFilterPad rotate_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
    },
    { NULL }
}

Definition at line 459 of file vf_rotate.c.

const AVFilterPad rotate_outputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .config_props = config_props,
    },
    { NULL }
}

Definition at line 468 of file vf_rotate.c.

AVFilter ff_vf_rotate

Initial value:

= {
    .name          = "rotate",
    .description   = NULL_IF_CONFIG_SMALL("Rotate the input image."),
    .priv_size     = sizeof(RotContext),
    .init          = init,
    .uninit        = uninit,
    .query_formats = query_formats,
    .process_command = process_command,
    .inputs        = rotate_inputs,
    .outputs       = rotate_outputs,
    .priv_class    = &rotate_class,
    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
}

Definition at line 477 of file vf_rotate.c.