aeval.c File Reference

eval audio source More...

#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "audio.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	EvalContext

Macros
#define	OFFSET(x)   offsetof(EvalContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	ADD_EXPRESSION(expr_)
#define	OFFSET(x)   offsetof(EvalContext, x)
#define	FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#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
static double	val (void *priv, double ch)
	AVFILTER_DEFINE_CLASS (aevalsrc)
static int	parse_channel_expressions (AVFilterContext *ctx, int expected_nb_channels)
static av_cold int	init (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)
static int	config_props (AVFilterLink *outlink)
static int	query_formats (AVFilterContext *ctx)
static int	request_frame (AVFilterLink *outlink)
	AVFILTER_DEFINE_CLASS (aeval)
static int	aeval_query_formats (AVFilterContext *ctx)
static int	aeval_config_output (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *in)

Variables
static const char *const	var_names []
static double(*const	aeval_func1 [])(void *, double) = { val, NULL }
static const char *const	aeval_func1_names [] = { "val", NULL }
static const AVOption	aevalsrc_options []
static const AVOption	aeval_options []

Detailed Description

eval audio source

Definition in file aeval.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(EvalContext, x)

Definition at line 314 of file aeval.c.

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 315 of file aeval.c.

#define ADD_EXPRESSION

(

expr_

)

Value:

do {                                      \
        if (!av_dynarray2_add((void **)&eval->expr, &eval->nb_channels, \
                              sizeof(*eval->expr), NULL)) {             \
            ret = AVERROR(ENOMEM);                                      \
            goto end;                                                   \
        }                                                               \
        eval->expr[eval->nb_channels-1] = NULL;                         \
        ret = av_expr_parse(&eval->expr[eval->nb_channels - 1], expr_,  \
                            var_names, func1_names, func1,              \
                            NULL, NULL, 0, ctx);                        \
        if (ret < 0)                                                    \
            goto end;                                                   \
    } while (0)

Referenced by parse_channel_expressions().

#define OFFSET

(

x

)

offsetof(EvalContext, x)

Definition at line 314 of file aeval.c.

#define FLAGS   AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 315 of file aeval.c.

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

Definition at line 396 of file aeval.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 46 of file aeval.c.

Function Documentation

static double val ( void *  priv, double  ch  )

static

Definition at line 76 of file aeval.c.

AVFILTER_DEFINE_CLASS

(

aevalsrc

)

static int parse_channel_expressions ( AVFilterContext *  ctx, int  expected_nb_channels  )

static

Definition at line 103 of file aeval.c.

Referenced by aeval_config_output(), and init().

static av_cold int init ( AVFilterContext *  ctx )

static

Definition at line 172 of file aeval.c.

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 210 of file aeval.c.

static int config_props ( AVFilterLink *  outlink )

static

Definition at line 222 of file aeval.c.

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 243 of file aeval.c.

static int request_frame ( AVFilterLink *  outlink )

static

Definition at line 257 of file aeval.c.

Referenced by ff_request_frame().

AVFILTER_DEFINE_CLASS

(

aeval

)

static int aeval_query_formats ( AVFilterContext *  ctx )

static

Definition at line 326 of file aeval.c.

static int aeval_config_output ( AVFilterLink *  outlink )

static

Definition at line 368 of file aeval.c.

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

static

Definition at line 398 of file aeval.c.

Referenced by ff_filter_frame(), ff_filter_frame_framed(), and ffmpeg_cleanup().

Variable Documentation

const char* const var_names[]

static

Initial value:

= {
    "ch",           
    "n",            
    "nb_in_channels",
    "nb_out_channels",
    "t",            
    "s",            
    NULL
}

Definition at line 36 of file aeval.c.

double(* const aeval_func1[])(void *, double) = { val, NULL }

static

Definition at line 82 of file aeval.c.

Referenced by parse_channel_expressions().

const char* const aeval_func1_names[] = { "val", NULL }

static

Definition at line 83 of file aeval.c.

Referenced by parse_channel_expressions().

const AVOption aevalsrc_options[]

static

Initial value:

= {
    { "exprs",       "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS },
    { "nb_samples",  "set the number of samples per requested frame", OFFSET(nb_samples),      AV_OPT_TYPE_INT,    {.i64 = 1024},    0,        INT_MAX, FLAGS },
    { "n",           "set the number of samples per requested frame", OFFSET(nb_samples),      AV_OPT_TYPE_INT,    {.i64 = 1024},    0,        INT_MAX, FLAGS },
    { "sample_rate", "set the sample rate",                           OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "s",           "set the sample rate",                           OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS },
    { "duration",    "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS },
    { "d",           "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS },
    { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "c",              "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { NULL }
}

Definition at line 88 of file aeval.c.

const AVOption aeval_options[]

static

Initial value:

= {
    { "exprs", "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS },
    { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { "c",              "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
    { NULL }
}

Definition at line 317 of file aeval.c.