339 lines
11 KiB
C
339 lines
11 KiB
C
/*
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* Copyright (c) 2007 Nicolas George <nicolas.george@normalesup.org>
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* Copyright (c) 2011 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Based on the test pattern generator demuxer by Nicolas George:
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* http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-October/037845.html
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*/
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#include <float.h>
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "avfilter.h"
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typedef struct {
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const AVClass *class;
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int h, w;
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unsigned int nb_frame;
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AVRational time_base;
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int64_t pts, max_pts;
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char *size; ///< video frame size
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char *rate; ///< video frame rate
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char *duration; ///< total duration of the generated video
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} TestSourceContext;
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#define OFFSET(x) offsetof(TestSourceContext, x)
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static const AVOption testsrc_options[]= {
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{ "size", "set video size", OFFSET(size), FF_OPT_TYPE_STRING, {.str = "320x240"}, 0, 0 },
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{ "s", "set video size", OFFSET(size), FF_OPT_TYPE_STRING, {.str = "320x240"}, 0, 0 },
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{ "rate", "set video rate", OFFSET(rate), FF_OPT_TYPE_STRING, {.str = "25"}, 0, 0 },
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{ "r", "set video rate", OFFSET(rate), FF_OPT_TYPE_STRING, {.str = "25"}, 0, 0 },
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{ "duration", "set video duration", OFFSET(duration), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0 },
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{ NULL },
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};
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static const char *testsrc_get_name(void *ctx)
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{
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return "testsrc";
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}
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static const AVClass testsrc_class = {
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"TestSourceContext",
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testsrc_get_name,
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testsrc_options
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};
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static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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TestSourceContext *test = ctx->priv;
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AVRational frame_rate_q;
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int64_t duration = -1;
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int ret = 0;
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test->class = &testsrc_class;
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av_opt_set_defaults2(test, 0, 0);
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if ((ret = (av_set_options_string(test, args, "=", ":"))) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
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return ret;
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}
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if ((ret = av_parse_video_size(&test->w, &test->h, test->size)) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid frame size: '%s'\n", test->size);
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return ret;
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}
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if ((ret = av_parse_video_rate(&frame_rate_q, test->rate)) < 0 ||
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frame_rate_q.den <= 0 || frame_rate_q.num <= 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: '%s'\n", test->rate);
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return ret;
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}
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if ((test->duration) && (ret = av_parse_time(&duration, test->duration, 1)) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid duration: '%s'\n", test->duration);
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return ret;
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}
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test->time_base.num = frame_rate_q.den;
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test->time_base.den = frame_rate_q.num;
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test->max_pts = duration >= 0 ?
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av_rescale_q(duration, AV_TIME_BASE_Q, test->time_base) : -1;
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test->nb_frame = 0;
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test->pts = 0;
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av_log(ctx, AV_LOG_INFO, "size:%dx%d rate:%d/%d duration:%f\n",
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test->w, test->h, frame_rate_q.num, frame_rate_q.den,
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duration < 0 ? -1 : test->max_pts * av_q2d(test->time_base));
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return 0;
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}
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static int config_props(AVFilterLink *outlink)
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{
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TestSourceContext *test = outlink->src->priv;
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outlink->w = test->w;
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outlink->h = test->h;
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outlink->time_base = test->time_base;
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return 0;
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}
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/**
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* Fill a rectangle with value val.
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*
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* @param val the RGB value to set
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* @param dst pointer to the destination buffer to fill
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* @param dst_linesize linesize of destination
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* @param segment_width width of the segment
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* @param x horizontal coordinate where to draw the rectangle in the destination buffer
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* @param y horizontal coordinate where to draw the rectangle in the destination buffer
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* @param w width of the rectangle to draw, expressed as a number of segment_width units
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* @param h height of the rectangle to draw, expressed as a number of segment_width units
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*/
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static void draw_rectangle(unsigned val, uint8_t *dst, int dst_linesize, unsigned segment_width,
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unsigned x, unsigned y, unsigned w, unsigned h)
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{
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int i;
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int step = 3;
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dst += segment_width * (step * x + y * dst_linesize);
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w *= segment_width * step;
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h *= segment_width;
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for (i = 0; i < h; i++) {
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memset(dst, val, w);
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dst += dst_linesize;
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}
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}
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static void draw_digit(int digit, uint8_t *dst, unsigned dst_linesize,
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unsigned segment_width)
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{
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#define TOP_HBAR 1
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#define MID_HBAR 2
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#define BOT_HBAR 4
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#define LEFT_TOP_VBAR 8
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#define LEFT_BOT_VBAR 16
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#define RIGHT_TOP_VBAR 32
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#define RIGHT_BOT_VBAR 64
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struct {
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int x, y, w, h;
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} segments[] = {
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{ 1, 0, 5, 1 }, /* TOP_HBAR */
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{ 1, 6, 5, 1 }, /* MID_HBAR */
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{ 1, 12, 5, 1 }, /* BOT_HBAR */
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{ 0, 1, 1, 5 }, /* LEFT_TOP_VBAR */
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{ 0, 7, 1, 5 }, /* LEFT_BOT_VBAR */
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{ 6, 1, 1, 5 }, /* RIGHT_TOP_VBAR */
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{ 6, 7, 1, 5 } /* RIGHT_BOT_VBAR */
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};
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static const unsigned char masks[10] = {
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/* 0 */ TOP_HBAR |BOT_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
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/* 1 */ RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
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/* 2 */ TOP_HBAR|MID_HBAR|BOT_HBAR|LEFT_BOT_VBAR |RIGHT_TOP_VBAR,
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/* 3 */ TOP_HBAR|MID_HBAR|BOT_HBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
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/* 4 */ MID_HBAR |LEFT_TOP_VBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
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/* 5 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR |RIGHT_BOT_VBAR,
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/* 6 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR |RIGHT_BOT_VBAR,
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/* 7 */ TOP_HBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
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/* 8 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR|LEFT_BOT_VBAR|RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
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/* 9 */ TOP_HBAR|BOT_HBAR|MID_HBAR|LEFT_TOP_VBAR |RIGHT_TOP_VBAR|RIGHT_BOT_VBAR,
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};
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unsigned mask = masks[digit];
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int i;
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draw_rectangle(0, dst, dst_linesize, segment_width, 0, 0, 8, 13);
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for (i = 0; i < FF_ARRAY_ELEMS(segments); i++)
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if (mask & (1<<i))
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draw_rectangle(255, dst, dst_linesize, segment_width,
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segments[i].x, segments[i].y, segments[i].w, segments[i].h);
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}
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#define GRADIENT_SIZE (6 * 256)
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static void fill_picture(TestSourceContext *test, AVFilterBufferRef *picref)
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{
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uint8_t *p, *p0;
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int x, y;
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int color, color_rest;
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int icolor;
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int radius;
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int quad0, quad;
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int dquad_x, dquad_y;
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int grad, dgrad, rgrad, drgrad;
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int seg_size;
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int second;
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int i;
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uint8_t *data = picref->data[0];
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int width = picref->video->w;
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int height = picref->video->h;
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/* draw colored bars and circle */
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radius = (width + height) / 4;
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quad0 = width * width / 4 + height * height / 4 - radius * radius;
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dquad_y = 1 - height;
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p0 = data;
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for (y = 0; y < height; y++) {
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p = p0;
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color = 0;
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color_rest = 0;
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quad = quad0;
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dquad_x = 1 - width;
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for (x = 0; x < width; x++) {
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icolor = color;
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if (quad < 0)
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icolor ^= 7;
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quad += dquad_x;
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dquad_x += 2;
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*(p++) = icolor & 1 ? 255 : 0;
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*(p++) = icolor & 2 ? 255 : 0;
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*(p++) = icolor & 4 ? 255 : 0;
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color_rest += 8;
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if (color_rest >= width) {
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color_rest -= width;
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color++;
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}
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}
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quad0 += dquad_y;
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dquad_y += 2;
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p0 += picref->linesize[0];
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}
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/* draw sliding color line */
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p = data + picref->linesize[0] * height * 3/4;
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grad = (256 * test->nb_frame * test->time_base.num / test->time_base.den) %
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GRADIENT_SIZE;
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rgrad = 0;
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dgrad = GRADIENT_SIZE / width;
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drgrad = GRADIENT_SIZE % width;
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for (x = 0; x < width; x++) {
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*(p++) =
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grad < 256 || grad >= 5 * 256 ? 255 :
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grad >= 2 * 256 && grad < 4 * 256 ? 0 :
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grad < 2 * 256 ? 2 * 256 - 1 - grad : grad - 4 * 256;
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*(p++) =
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grad >= 4 * 256 ? 0 :
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grad >= 1 * 256 && grad < 3 * 256 ? 255 :
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grad < 1 * 256 ? grad : 4 * 256 - 1 - grad;
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*(p++) =
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grad < 2 * 256 ? 0 :
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grad >= 3 * 256 && grad < 5 * 256 ? 255 :
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grad < 3 * 256 ? grad - 2 * 256 : 6 * 256 - 1 - grad;
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grad += dgrad;
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rgrad += drgrad;
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if (rgrad >= GRADIENT_SIZE) {
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grad++;
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rgrad -= GRADIENT_SIZE;
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}
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if (grad >= GRADIENT_SIZE)
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grad -= GRADIENT_SIZE;
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}
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for (y = height / 8; y > 0; y--) {
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memcpy(p, p - picref->linesize[0], 3 * width);
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p += picref->linesize[0];
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}
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/* draw digits */
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seg_size = width / 80;
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if (seg_size >= 1 && height >= 13 * seg_size) {
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second = test->nb_frame * test->time_base.num / test->time_base.den;
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x = width - (width - seg_size * 64) / 2;
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y = (height - seg_size * 13) / 2;
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p = data + (x*3 + y * picref->linesize[0]);
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for (i = 0; i < 8; i++) {
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p -= 3 * 8 * seg_size;
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draw_digit(second % 10, p, picref->linesize[0], seg_size);
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second /= 10;
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if (second == 0)
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break;
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}
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}
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}
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static int request_frame(AVFilterLink *outlink)
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{
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TestSourceContext *test = outlink->src->priv;
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AVFilterBufferRef *picref;
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if (test->max_pts >= 0 && test->pts > test->max_pts)
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return AVERROR_EOF;
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picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE,
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test->w, test->h);
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picref->pts = test->pts++;
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test->nb_frame++;
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fill_picture(test, picref);
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avfilter_start_frame(outlink, avfilter_ref_buffer(picref, ~0));
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avfilter_draw_slice(outlink, 0, picref->video->h, 1);
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avfilter_end_frame(outlink);
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avfilter_unref_buffer(picref);
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum PixelFormat pix_fmts[] = {
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PIX_FMT_RGB24, PIX_FMT_NONE
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};
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avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
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return 0;
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}
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AVFilter avfilter_vsrc_testsrc = {
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.name = "testsrc",
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.description = NULL_IF_CONFIG_SMALL("Generate test pattern."),
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.priv_size = sizeof(TestSourceContext),
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.init = init,
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.query_formats = query_formats,
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.inputs = (AVFilterPad[]) {{ .name = NULL}},
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.outputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.request_frame = request_frame,
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.config_props = config_props, },
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{ .name = NULL }},
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};
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