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FFmpeg/libavfilter/src_avsynctest.c
Paul B Mahol 1047fedd0f avfilter: add Audio Video Sync Test filter 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
2022-04-12 10:51:46 +02:00

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/*
* Copyright (c) 2017-2022 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/channel_layout.h"
#include "libavutil/ffmath.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "libavutil/timestamp.h"
#include "libavutil/xga_font_data.h"
#include "avfilter.h"
#include "drawutils.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "audio.h"
#include "video.h"
typedef struct AVSyncTestContext {
const AVClass *class;
int w, h;
AVRational frame_rate;
int sample_rate;
int64_t duration;
int64_t apts, vpts;
float amplitude;
int period;
int delay;
int cycle;
int beep;
int beep_duration;
int flash;
int dir;
AVRational vdelay, delay_max, delay_min;
AVRational delay_range;
int64_t prev_intpart;
uint8_t rgba[3][4];
FFDrawContext draw;
FFDrawColor fg;
FFDrawColor bg;
FFDrawColor ag;
} AVSyncTestContext;
#define OFFSET(x) offsetof(AVSyncTestContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define V AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption avsynctest_options[] = {
{"size", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, V },
{"s", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, V },
{"framerate", "set frame rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="30"}, 0,INT_MAX, V },
{"fr", "set frame rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="30"}, 0,INT_MAX, V },
{"samplerate", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100},8000,384000, A },
{"sr", "set sample rate", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64=44100},8000,384000, A },
{"amplitude", "set beep amplitude", OFFSET(amplitude), AV_OPT_TYPE_FLOAT, {.dbl=.7}, 0., 1., A },
{"a", "set beep amplitude", OFFSET(amplitude), AV_OPT_TYPE_FLOAT, {.dbl=.7}, 0., 1., A },
{"period", "set beep period", OFFSET(period), AV_OPT_TYPE_INT, {.i64=3}, 1, 99., A },
{"p", "set beep period", OFFSET(period), AV_OPT_TYPE_INT, {.i64=3}, 1, 99., A },
{"delay", "set flash delay", OFFSET(delay), AV_OPT_TYPE_INT, {.i64=0}, -30, 30, V },
{"dl", "set flash delay", OFFSET(delay), AV_OPT_TYPE_INT, {.i64=0}, -30, 30, V },
{"cycle", "set delay cycle", OFFSET(cycle), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, V },
{"c", "set delay cycle", OFFSET(cycle), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, V },
{"duration", "set duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, V|A },
{"d", "set duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=0}, 0, INT64_MAX, V|A },
{"fg", "set foreground color", OFFSET(rgba[0]), AV_OPT_TYPE_COLOR, {.str="white"}, 0, 0, V },
{"bg", "set background color", OFFSET(rgba[1]), AV_OPT_TYPE_COLOR, {.str="black"}, 0, 0, V },
{"ag", "set additional color", OFFSET(rgba[2]), AV_OPT_TYPE_COLOR, {.str="gray"}, 0, 0, V },
{NULL},
};
AVFILTER_DEFINE_CLASS(avsynctest);
static av_cold int query_formats(AVFilterContext *ctx)
{
AVSyncTestContext *s = ctx->priv;
AVFilterChannelLayouts *chlayout = NULL;
int sample_rates[] = { s->sample_rate, -1 };
static const enum AVSampleFormat sample_fmts[] = {
AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_NONE
};
AVFilterFormats *formats;
int ret;
formats = ff_make_format_list(sample_fmts);
if (!formats)
return AVERROR(ENOMEM);
if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->incfg.formats)) < 0)
return ret;
formats = ff_draw_supported_pixel_formats(0);
if (!formats)
return AVERROR(ENOMEM);
if ((ret = ff_formats_ref(formats, &ctx->outputs[1]->incfg.formats)) < 0)
return ret;
if ((ret = ff_add_channel_layout(&chlayout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO)) < 0)
return ret;
ret = ff_set_common_channel_layouts(ctx, chlayout);
if (ret < 0)
return ret;
formats = ff_make_format_list(sample_rates);
if (!formats)
return AVERROR(ENOMEM);
return ff_set_common_samplerates(ctx, formats);
}
static av_cold int aconfig_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVSyncTestContext *s = ctx->priv;
outlink->sample_rate = s->sample_rate;
outlink->time_base = (AVRational){1, s->sample_rate};
s->beep_duration = av_rescale(s->sample_rate, s->frame_rate.den, s->frame_rate.num);
s->duration = av_rescale(s->duration, s->sample_rate, AV_TIME_BASE);
return 0;
}
static av_cold int config_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVSyncTestContext *s = ctx->priv;
outlink->w = s->w;
outlink->h = s->h;
outlink->time_base = av_inv_q(s->frame_rate);
outlink->frame_rate = s->frame_rate;
outlink->sample_aspect_ratio = (AVRational) {1, 1};
s->delay_min = av_mul_q(s->frame_rate, av_make_q(-1, 2));
s->delay_max = av_mul_q(s->delay_min, av_make_q(-1, 1));
s->delay_range = av_sub_q(s->delay_max, s->delay_min);
s->vdelay = av_make_q(s->delay, 1);
s->dir = 1;
s->prev_intpart = INT64_MIN;
ff_draw_init(&s->draw, outlink->format, 0);
ff_draw_color(&s->draw, &s->fg, s->rgba[0]);
ff_draw_color(&s->draw, &s->bg, s->rgba[1]);
ff_draw_color(&s->draw, &s->ag, s->rgba[2] );
return 0;
}
#define FPI 0x8000
static int32_t sin32(int32_t x, int shift)
{
const double pi = M_PI;
const int32_t a = ((2.0 * pi) * (1 << 24));
const int32_t b = (1 << 7) * (12.0 / pi - 1.0 - pi) * (1 << 24);
const int32_t c = (1 << 9) * 3.0 * (2.0 + pi - 16.0 / pi) * (1 << 24);
int64_t x2, result;
int32_t t1, t2;
x &= 2 * FPI - 1;
if (x >= (3 * FPI / 2))
x = x - 2 * FPI;
else if (x > FPI / 2)
x = FPI - x;
x2 = x * x;
t1 = (x2 * c) >> 32;
t2 = ((b + t1) * x2) >> 32;
x = x << 8;
result = a + t2;
result *= x;
result += (1U << 31);
result >>= (32 - shift);
return result;
}
static int audio_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVSyncTestContext *s = ctx->priv;
const int a = lrintf(s->amplitude * 15);
int64_t duration[2];
int64_t delta;
AVFrame *out;
int32_t *dst;
delta = av_rescale_q(s->vpts, av_make_q(s->sample_rate, 1), s->frame_rate) - s->apts;
if (delta < 0)
return 1;
duration[0] = av_rescale_rnd(s->sample_rate, s->frame_rate.den, s->frame_rate.num, AV_ROUND_DOWN);
duration[1] = av_rescale_rnd(s->sample_rate, s->frame_rate.den, s->frame_rate.num, AV_ROUND_UP);
delta = duration[delta > 0];
out = ff_get_audio_buffer(outlink, delta);
if (!out)
return AVERROR(ENOMEM);
out->pts = s->apts;
dst = (int32_t *)out->data[0];
for (int i = 0; i < delta; i++) {
if (((s->apts + i) % (s->period * s->sample_rate)) == 0)
s->beep = 1;
if (s->beep) {
dst[i] = sin32(av_rescale_q(800LL * 2LL * FPI, outlink->time_base, av_make_q(1, s->apts + i)), a);
s->beep++;
} else {
dst[i] = 0;
}
if (s->beep >= s->beep_duration) {
s->beep = 0;
}
}
s->apts += out->nb_samples;
return ff_filter_frame(outlink, out);
}
static void draw_text(FFDrawContext *draw, AVFrame *out, FFDrawColor *color,
int x0, int y0, const uint8_t *text)
{
int x = x0;
for (; *text; text++) {
if (*text == '\n') {
x = x0;
y0 += 8;
continue;
}
ff_blend_mask(draw, color, out->data, out->linesize,
out->width, out->height,
avpriv_cga_font + *text * 8, 1, 8, 8, 0, 0, x, y0);
x += 8;
}
}
static int offset(int x, int num, int den)
{
return av_rescale_rnd(x, num, den, AV_ROUND_UP);
}
static int video_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVSyncTestContext *s = ctx->priv;
const int w = outlink->w;
const int h = outlink->h;
const int step = av_rescale_rnd(w, s->delay_range.den, s->delay_range.num, AV_ROUND_DOWN);
char text[128];
int new_offset;
int64_t delta, temp, intpart;
AVFrame *out;
delta = av_rescale_q(s->apts, s->frame_rate, av_make_q(s->sample_rate, 1)) - s->vpts;
if (delta < 0)
return 1;
out = ff_get_video_buffer(outlink, w, h);
if (!out)
return AVERROR(ENOMEM);
ff_fill_rectangle(&s->draw, &s->bg, out->data, out->linesize, 0, 0, w, h);
snprintf(text, sizeof(text), "FRN: %"PRId64"", s->vpts);
draw_text(&s->draw, out, &s->fg, offset(w, 1, 10), offset(h, 1, 10), text);
snprintf(text, sizeof(text), "SEC: %s", av_ts2timestr(s->vpts, &outlink->time_base));
draw_text(&s->draw, out, &s->fg, offset(w, 1, 10), offset(h, 9, 10), text);
snprintf(text, sizeof(text), "DLY: %d", s->vdelay.num);
draw_text(&s->draw, out, &s->fg, offset(w, 9, 10) - strlen(text) * 8, offset(h, 9, 10), text);
snprintf(text, sizeof(text), "FPS: %d/%d", s->frame_rate.num, s->frame_rate.den);
draw_text(&s->draw, out, &s->fg, offset(w, 9, 10) - strlen(text) * 8, offset(h, 1, 10), text);
snprintf(text, sizeof(text), "P: %d", s->period);
draw_text(&s->draw, out, &s->ag, offset(w, 1, 2) - strlen(text) * 4, offset(h, 9, 10), text);
snprintf(text, sizeof(text), "SR: %d", s->sample_rate);
draw_text(&s->draw, out, &s->ag, offset(w, 1, 2) - strlen(text) * 4, offset(h, 1, 10), text);
snprintf(text, sizeof(text), "A: %1.2f", s->amplitude);
draw_text(&s->draw, out, &s->ag, offset(w, 1, 10), offset(h, 1, 2), text);
snprintf(text, sizeof(text), "WxH: %dx%d", w, h);
draw_text(&s->draw, out, &s->ag, offset(w, 9, 10) - strlen(text) * 8, offset(h, 1, 2), text);
temp = s->vpts + s->vdelay.num;
intpart = av_rescale_rnd(temp, outlink->time_base.num, outlink->time_base.den, AV_ROUND_NEAR_INF);
intpart = temp - av_rescale_rnd(intpart, outlink->time_base.den, outlink->time_base.num, AV_ROUND_NEAR_INF);
new_offset = offset(w, 1, 2);
ff_fill_rectangle(&s->draw, &s->fg, out->data, out->linesize,
av_clip(new_offset + step * intpart, 0, w - 2),
offset(h, 141, 200), offset(step, 2, 3), offset(h, 1, 25));
if (intpart == 0 && s->prev_intpart != intpart) {
if (s->flash >= s->period) {
int result;
if (s->cycle)
s->vdelay = av_add_q(s->vdelay, av_make_q(s->dir, 1));
result = av_cmp_q(s->vdelay, s->delay_max);
if (result >= 0)
s->dir = -1;
result = av_cmp_q(s->vdelay, s->delay_min);
if (result <= 0)
s->dir = 1;
ff_fill_rectangle(&s->draw, &s->fg, out->data, out->linesize,
offset(w, 1, 3), offset(h, 1, 3), offset(w, 1, 3), offset(h, 1, 4));
s->flash = 0;
}
s->flash++;
}
s->prev_intpart = intpart;
for (int i = av_rescale(s->delay_min.num, 1, s->delay_min.den);
i < av_rescale(s->delay_max.num, 1, s->delay_max.den); i++) {
ff_fill_rectangle(&s->draw, &s->fg, out->data, out->linesize,
av_clip(new_offset + step * i, 0, w - 2),
offset(h, 7, 10), 1, offset(h, 1, 20));
}
out->pts = s->vpts++;
return ff_filter_frame(outlink, out);
}
static int activate(AVFilterContext *ctx)
{
AVSyncTestContext *s = ctx->priv;
AVFilterLink *aoutlink = ctx->outputs[0];
AVFilterLink *voutlink = ctx->outputs[1];
int ret = FFERROR_NOT_READY;
if (!ff_outlink_frame_wanted(aoutlink) &&
!ff_outlink_frame_wanted(voutlink))
return ret;
if (s->duration > 0 && s->apts >= s->duration) {
ff_outlink_set_status(aoutlink, AVERROR_EOF, s->apts);
ff_outlink_set_status(voutlink, AVERROR_EOF, s->vpts);
return 0;
}
ret = audio_frame(aoutlink);
if (ret < 0)
return ret;
ret = video_frame(voutlink);
return ret;
}
static const AVFilterPad avsynctest_outputs[] = {
{
.name = "audio",
.type = AVMEDIA_TYPE_AUDIO,
.config_props = aconfig_props,
},
{
.name = "video",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_props,
},
};
const AVFilter ff_avsrc_avsynctest = {
.name = "avsynctest",
.description = NULL_IF_CONFIG_SMALL("Generate an Audio Video Sync Test."),
.priv_size = sizeof(AVSyncTestContext),
.priv_class = &avsynctest_class,
.inputs = NULL,
.activate = activate,
FILTER_OUTPUTS(avsynctest_outputs),
FILTER_QUERY_FUNC(query_formats),
};
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