avf_abitscope.c File Reference

#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "audio.h"
#include "video.h"
#include "internal.h"

Go to the source code of this file.

Data Structures
struct	AudioBitScopeContext

Macros
#define	OFFSET(x)   offsetof(AudioBitScopeContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define	BARS(type, depth, one)
#define	DO_TRACE(type, depth, one)

Functions
	AVFILTER_DEFINE_CLASS (abitscope)
static int	query_formats (AVFilterContext *ctx)
static int	config_input (AVFilterLink *inlink)
static int	config_output (AVFilterLink *outlink)
static int	filter_frame (AVFilterLink *inlink, AVFrame *insamples)
static int	activate (AVFilterContext *ctx)
static av_cold void	uninit (AVFilterContext *ctx)

Variables
static const AVOption	abitscope_options []
static const AVFilterPad	inputs []
static const AVFilterPad	outputs []
const AVFilter	ff_avf_abitscope

Macro Definition Documentation

OFFSET

#define OFFSET

(

x

)

offsetof(AudioBitScopeContext, x)

Definition at line 50 of file avf_abitscope.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 51 of file avf_abitscope.c.

BARS

#define BARS	(		type,
			depth,
			one
	)

Value:

    for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) {            \
        const type *in = (const type *)insamples->extended_data[ch];        \
        const int w = outpicref->width / inlink->ch_layout.nb_channels;     \
        const int h = outpicref->height / depth;                            \
        const uint32_t color = AV_RN32(&s->fg[4 * ch]);                     \
                                                                            \
        memset(s->counter, 0, sizeof(s->counter));                          \
        for (int i = 0; i < insamples->nb_samples; i++) {                   \
            for (int j = 0; j < depth; j++) {                               \
                if (in[i] & (one << j))                                     \
                    s->counter[j]++;                                        \
            }                                                               \
        }                                                                   \
                                                                            \
        for (int b = 0; b < depth; b++) {                                   \
            for (int j = 1; j < h - 1; j++) {                               \
                uint8_t *dst = outpicref->data[0] + (b * h + j) * outpicref->linesize[0] + w * ch * 4; \
                const int ww = (s->counter[depth - b - 1] / (float)insamples->nb_samples) * (w - 1); \
                                                                            \
                for (int i = 0; i < ww; i++) {                              \
                    AV_WN32(&dst[i * 4], color);                            \
                }                                                           \
            }                                                               \
        }                                                                   \
    }

Definition at line 150 of file avf_abitscope.c.

DO_TRACE

#define DO_TRACE	(		type,
			depth,
			one
	)

Value:

    for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) {            \
        const int w = outpicref->width / inlink->ch_layout.nb_channels;     \
        const type *in = (const type *)insamples->extended_data[ch];        \
        const int wb = w / depth;                                           \
        int wv;                                                             \
                                                                            \
        memset(s->counter, 0, sizeof(s->counter));                          \
        for (int i = 0; i < insamples->nb_samples; i++) {                   \
            for (int j = 0; j < depth; j++) {                               \
                if (in[i] & (one << j))                                     \
                    s->counter[j]++;                                        \
            }                                                               \
        }                                                                   \
                                                                            \
        for (int b = 0; b < depth; b++) {                                   \
            uint8_t colors[4];                                              \
            uint32_t color;                                                 \
            uint8_t *dst = outpicref->data[0] + w * ch * 4 + wb * b * 4 +   \
                           s->current_vpos * outpicref->linesize[0];        \
            wv = (s->counter[depth - b - 1] * 255) / insamples->nb_samples; \
            colors[0] = (wv * s->fg[ch * 4 + 0] + 127) / 255;               \
            colors[1] = (wv * s->fg[ch * 4 + 1] + 127) / 255;               \
            colors[2] = (wv * s->fg[ch * 4 + 2] + 127) / 255;               \
            colors[3] = (wv * s->fg[ch * 4 + 3] + 127) / 255;               \
            color = AV_RN32(colors);                                        \
                                                                            \
            for (int x = 0; x < wb; x++)                                    \
                AV_WN32(&dst[x * 4], color);                                \
        }                                                                   \
    }

Definition at line 177 of file avf_abitscope.c.

Function Documentation

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

abitscope

)

query_formats()

static int query_formats ( AVFilterContext *  ctx )

static

Definition at line 68 of file avf_abitscope.c.

config_input()

static int config_input ( AVFilterLink *  inlink )

static

Definition at line 102 of file avf_abitscope.c.

config_output()

static int config_output ( AVFilterLink *  outlink )

static

Definition at line 138 of file avf_abitscope.c.

filter_frame()

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

static

Definition at line 209 of file avf_abitscope.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 264 of file avf_abitscope.c.

uninit()

static av_cold void uninit ( AVFilterContext *  ctx )

static

Definition at line 286 of file avf_abitscope.c.

Variable Documentation

abitscope_options

const AVOption abitscope_options[]

static

Initial value:

= {
    { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { "r",    "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
    { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
    { "mode", "set output mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, "mode" },
    { "m",    "set output mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, "mode" },
    { "bars",  NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "mode" },
    { "trace", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "mode" },
    { NULL }
}

Definition at line 53 of file avf_abitscope.c.

inputs

const AVFilterPad inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .config_props = config_input,
    },
}

Definition at line 293 of file avf_abitscope.c.

outputs

const AVFilterPad outputs[]

static

Initial value:

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

Definition at line 301 of file avf_abitscope.c.

ff_avf_abitscope

const AVFilter ff_avf_abitscope

Initial value:

= {
    .name          = "abitscope",
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to audio bit scope video output."),
    .priv_size     = sizeof(AudioBitScopeContext),
    FILTER_INPUTS(inputs),
    FILTER_OUTPUTS(outputs),
    FILTER_QUERY_FUNC(query_formats),
    .uninit        = uninit,
    .activate      = activate,
    .priv_class    = &abitscope_class,
}

Definition at line 309 of file avf_abitscope.c.