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lavfi: add testsrc source 

Signed-off-by: Anton Khirnov <anton@khirnov.net>
tags/n0.9
Stefano Sabatini Anton Khirnov 14 years ago
parent
4e64c4d51a
commit
0244879f30
5 changed files with 408 additions and 1 deletions
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  1. +46
    -0
      doc/filters.texi
  2. +1
    -0
      libavfilter/Makefile
  3. +1
    -0
      libavfilter/allfilters.c
  4. +1
    -1
      libavfilter/avfilter.h
  5. +359
    -0
      libavfilter/vsrc_testsrc.c

+ 46
- 0
doc/filters.texi View File

@@ -1974,6 +1974,52 @@ Some examples follow:
frei0r_src=200x200:10:partik0l=1234 [overlay]; [in][overlay] overlay
@end example

@section testsrc

Generate a test video pattern, showing a color pattern, a scrolling
gradient and a timestamp. This is mainly intended for testing
purposes.

It accepts an optional sequence of @var{key}=@var{value} pairs,
separated by ":". The description of the accepted options follows.

@table @option

@item size, s
Specify the size of the sourced video, it may be a string of the form
@var{width}x@var{heigth}, or the name of a size abbreviation. The
default value is "320x240".

@item rate, r
Specify the frame rate of the sourced video, as the number of frames
generated per second. It has to be a string in the format
@var{frame_rate_num}/@var{frame_rate_den}, an integer number, a float
number or a valid video frame rate abbreviation. The default value is
"25".

@item sar
Set the sample aspect ratio of the sourced video.

@item duration
Set the video duration of the sourced video. The accepted syntax is:
@example
[-]HH[:MM[:SS[.m...]]]
[-]S+[.m...]
@end example
See also the function @code{av_parse_time()}.

If not specified, or the expressed duration is negative, the video is
supposed to be generated forever.
@end table

For example the following:
@example
testsrc=duration=5.3:size=qcif:rate=10
@end example

will generate a video with a duration of 5.3 seconds, with size
176x144 and a framerate of 10 frames per second.

@c man end VIDEO SOURCES

@chapter Video Sinks


+ 1
- 0
libavfilter/Makefile View File

@@ -64,6 +64,7 @@ OBJS-$(CONFIG_COLOR_FILTER) += vsrc_color.o
OBJS-$(CONFIG_FREI0R_SRC_FILTER) += vf_frei0r.o
OBJS-$(CONFIG_MOVIE_FILTER) += vsrc_movie.o
OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_nullsrc.o
OBJS-$(CONFIG_TESTSRC_FILTER) += vsrc_testsrc.o

OBJS-$(CONFIG_NULLSINK_FILTER) += vsink_nullsink.o



+ 1
- 0
libavfilter/allfilters.c View File

@@ -85,6 +85,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (FREI0R, frei0r_src, vsrc);
REGISTER_FILTER (MOVIE, movie, vsrc);
REGISTER_FILTER (NULLSRC, nullsrc, vsrc);
REGISTER_FILTER (TESTSRC, testsrc, vsrc);

REGISTER_FILTER (NULLSINK, nullsink, vsink);
}

+ 1
- 1
libavfilter/avfilter.h View File

@@ -29,7 +29,7 @@
#include "libavutil/rational.h"

#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 11
#define LIBAVFILTER_VERSION_MINOR 12
#define LIBAVFILTER_VERSION_MICRO 0

#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \


+ 359
- 0
libavfilter/vsrc_testsrc.c View File

@@ -0,0 +1,359 @@
/*
* Copyright (c) 2007 Nicolas George <nicolas.george@normalesup.org>
* Copyright (c) 2011 Stefano Sabatini
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

/**
* @file
* Based on the test pattern generator demuxer by Nicolas George:
* http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-October/037845.html
*/

#include <float.h>

#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"

typedef struct {
const AVClass *class;
int h, w;
unsigned int nb_frame;
AVRational time_base;
int64_t pts, max_pts;
char *size; ///< video frame size
char *rate; ///< video frame rate
char *duration; ///< total duration of the generated video
AVRational sar; ///< sample aspect ratio

void (* fill_picture_fn)(AVFilterContext *ctx, AVFilterBufferRef *picref);
} TestSourceContext;

#define OFFSET(x) offsetof(TestSourceContext, x)

static const AVOption testsrc_options[] = {
{ "size", "set video size", OFFSET(size), FF_OPT_TYPE_STRING, {.str = "320x240"}},
{ "s", "set video size", OFFSET(size), FF_OPT_TYPE_STRING, {.str = "320x240"}},
{ "rate", "set video rate", OFFSET(rate), FF_OPT_TYPE_STRING, {.str = "25"}, },
{ "r", "set video rate", OFFSET(rate), FF_OPT_TYPE_STRING, {.str = "25"}, },
{ "duration", "set video duration", OFFSET(duration), FF_OPT_TYPE_STRING, {.str = NULL}, },
{ "sar", "set video sample aspect ratio", OFFSET(sar), FF_OPT_TYPE_RATIONAL, {1}, 0, INT_MAX },
{ NULL },
};

static av_cold int init_common(AVFilterContext *ctx, const char *args, void *opaque)
{
TestSourceContext *test = ctx->priv;
AVRational frame_rate_q;
int64_t duration = -1;
int ret = 0;

av_opt_set_defaults(test);

if ((ret = (av_set_options_string(test, args, "=", ":"))) < 0) {
av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
return ret;
}

if ((ret = av_parse_video_size(&test->w, &test->h, test->size)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", test->size);
return ret;
}

if ((ret = av_parse_video_rate(&frame_rate_q, test->rate)) < 0 ||
frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", test->rate);
return ret;
}

if ((test->duration) && (ret = av_parse_time(&duration, test->duration, 1)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Invalid duration: '%s'\n", test->duration);
return ret;
}

test->time_base.num = frame_rate_q.den;
test->time_base.den = frame_rate_q.num;
test->max_pts = duration >= 0 ?
av_rescale_q(duration, AV_TIME_BASE_Q, test->time_base) : -1;
test->nb_frame = 0;
test->pts = 0;

av_log(ctx, AV_LOG_DEBUG, "size:%dx%d rate:%d/%d duration:%f sar:%d/%d\n",
test->w, test->h, frame_rate_q.num, frame_rate_q.den,
duration < 0 ? -1 : test->max_pts * av_q2d(test->time_base),
test->sar.num, test->sar.den);
return 0;
}

static int config_props(AVFilterLink *outlink)
{
TestSourceContext *test = outlink->src->priv;

outlink->w = test->w;
outlink->h = test->h;
outlink->sample_aspect_ratio = test->sar;
outlink->time_base = test->time_base;

return 0;
}

static int request_frame(AVFilterLink *outlink)
{
TestSourceContext *test = outlink->src->priv;
AVFilterBufferRef *picref;

if (test->max_pts >= 0 && test->pts > test->max_pts)
return AVERROR_EOF;
picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
test->w, test->h);
picref->pts = test->pts++;
picref->pos = -1;
picref->video->key_frame = 1;
picref->video->interlaced = 0;
picref->video->pict_type = AV_PICTURE_TYPE_I;
picref->video->pixel_aspect = test->sar;
test->nb_frame++;
test->fill_picture_fn(outlink->src, picref);

avfilter_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
avfilter_draw_slice(outlink, 0, picref->video->h, 1);
avfilter_end_frame(outlink);
avfilter_unref_buffer(picref);

return 0;
}

static const char *testsrc_get_name(void *ctx)
{
return "testsrc";
}

static const AVClass testsrc_class = {
.class_name = "TestSourceContext",
.item_name = testsrc_get_name,
.option = testsrc_options,
};

/**
* Fill a rectangle with value val.
*
* @param val the RGB value to set
* @param dst pointer to the destination buffer to fill
* @param dst_linesize linesize of destination
* @param segment_width width of the segment
* @param x horizontal coordinate where to draw the rectangle in the destination buffer
* @param y horizontal coordinate where to draw the rectangle in the destination buffer
* @param w width of the rectangle to draw, expressed as a number of segment_width units
* @param h height of the rectangle to draw, expressed as a number of segment_width units
*/
static void draw_rectangle(unsigned val, uint8_t *dst, int dst_linesize, unsigned segment_width,
unsigned x, unsigned y, unsigned w, unsigned h)
{
int i;
int step = 3;

dst += segment_width * (step * x + y * dst_linesize);
w *= segment_width * step;
h *= segment_width;
for (i = 0; i < h; i++) {
memset(dst, val, w);
dst += dst_linesize;
}
}

static void draw_digit(int digit, uint8_t *dst, unsigned dst_linesize,
unsigned segment_width)
{
#define TOP_HBAR 1
#define MID_HBAR 2
#define BOT_HBAR 4
#define LEFT_TOP_VBAR 8
#define LEFT_BOT_VBAR 16
#define RIGHT_TOP_VBAR 32
#define RIGHT_BOT_VBAR 64
struct {
int x, y, w, h;
} segments[] = {
{ 1, 0, 5, 1 }, /* TOP_HBAR */
{ 1, 6, 5, 1 }, /* MID_HBAR */
{ 1, 12, 5, 1 }, /* BOT_HBAR */
{ 0, 1, 1, 5 }, /* LEFT_TOP_VBAR */
{ 0, 7, 1, 5 }, /* LEFT_BOT_VBAR */
{ 6, 1, 1, 5 }, /* RIGHT_TOP_VBAR */
{ 6, 7, 1, 5 } /* RIGHT_BOT_VBAR */
};
static const unsigned char masks[10] = {
/* 0 */ TOP_HBAR |BOT_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 1 */ RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 2 */ TOP_HBAR|MID_HBAR|BOT_HBAR|LEFT_BOT_VBAR |RIGHT_TOP_VBAR,
/* 3 */ TOP_HBAR|MID_HBAR|BOT_HBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 4 */ MID_HBAR |LEFT_TOP_VBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 5 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR |RIGHT_BOT_VBAR,
/* 6 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR |RIGHT_BOT_VBAR,
/* 7 */ TOP_HBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 8 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
/* 9 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
};
unsigned mask = masks[digit];
int i;

draw_rectangle(0, dst, dst_linesize, segment_width, 0, 0, 8, 13);
for (i = 0; i < FF_ARRAY_ELEMS(segments); i++)
if (mask & (1<<i))
draw_rectangle(255, dst, dst_linesize, segment_width,
segments[i].x, segments[i].y, segments[i].w, segments[i].h);
}

#define GRADIENT_SIZE (6 * 256)

static void test_fill_picture(AVFilterContext *ctx, AVFilterBufferRef *picref)
{
TestSourceContext *test = ctx->priv;
uint8_t *p, *p0;
int x, y;
int color, color_rest;
int icolor;
int radius;
int quad0, quad;
int dquad_x, dquad_y;
int grad, dgrad, rgrad, drgrad;
int seg_size;
int second;
int i;
uint8_t *data = picref->data[0];
int width = picref->video->w;
int height = picref->video->h;

/* draw colored bars and circle */
radius = (width + height) / 4;
quad0 = width * width / 4 + height * height / 4 - radius * radius;
dquad_y = 1 - height;
p0 = data;
for (y = 0; y < height; y++) {
p = p0;
color = 0;
color_rest = 0;
quad = quad0;
dquad_x = 1 - width;
for (x = 0; x < width; x++) {
icolor = color;
if (quad < 0)
icolor ^= 7;
quad += dquad_x;
dquad_x += 2;
*(p++) = icolor & 1 ? 255 : 0;
*(p++) = icolor & 2 ? 255 : 0;
*(p++) = icolor & 4 ? 255 : 0;
color_rest += 8;
if (color_rest >= width) {
color_rest -= width;
color++;
}
}
quad0 += dquad_y;
dquad_y += 2;
p0 += picref->linesize[0];
}

/* draw sliding color line */
p = data + picref->linesize[0] * height * 3/4;
grad = (256 * test->nb_frame * test->time_base.num / test->time_base.den) %
GRADIENT_SIZE;
rgrad = 0;
dgrad = GRADIENT_SIZE / width;
drgrad = GRADIENT_SIZE % width;
for (x = 0; x < width; x++) {
*(p++) =
grad < 256 || grad >= 5 * 256 ? 255 :
grad >= 2 * 256 && grad < 4 * 256 ? 0 :
grad < 2 * 256 ? 2 * 256 - 1 - grad : grad - 4 * 256;
*(p++) =
grad >= 4 * 256 ? 0 :
grad >= 1 * 256 && grad < 3 * 256 ? 255 :
grad < 1 * 256 ? grad : 4 * 256 - 1 - grad;
*(p++) =
grad < 2 * 256 ? 0 :
grad >= 3 * 256 && grad < 5 * 256 ? 255 :
grad < 3 * 256 ? grad - 2 * 256 : 6 * 256 - 1 - grad;
grad += dgrad;
rgrad += drgrad;
if (rgrad >= GRADIENT_SIZE) {
grad++;
rgrad -= GRADIENT_SIZE;
}
if (grad >= GRADIENT_SIZE)
grad -= GRADIENT_SIZE;
}
for (y = height / 8; y > 0; y--) {
memcpy(p, p - picref->linesize[0], 3 * width);
p += picref->linesize[0];
}

/* draw digits */
seg_size = width / 80;
if (seg_size >= 1 && height >= 13 * seg_size) {
second = test->nb_frame * test->time_base.num / test->time_base.den;
x = width - (width - seg_size * 64) / 2;
y = (height - seg_size * 13) / 2;
p = data + (x*3 + y * picref->linesize[0]);
for (i = 0; i < 8; i++) {
p -= 3 * 8 * seg_size;
draw_digit(second % 10, p, picref->linesize[0], seg_size);
second /= 10;
if (second == 0)
break;
}
}
}

static av_cold int test_init(AVFilterContext *ctx, const char *args, void *opaque)
{
TestSourceContext *test = ctx->priv;

test->class = &testsrc_class;
test->fill_picture_fn = test_fill_picture;
return init_common(ctx, args, opaque);
}

static int test_query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
PIX_FMT_RGB24, PIX_FMT_NONE
};
avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}

AVFilter avfilter_vsrc_testsrc = {
.name = "testsrc",
.description = NULL_IF_CONFIG_SMALL("Generate test pattern."),
.priv_size = sizeof(TestSourceContext),
.init = test_init,

.query_formats = test_query_formats,

.inputs = (AVFilterPad[]) {{ .name = NULL}},

.outputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = config_props, },
{ .name = NULL }},
};

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