diff options
Diffstat (limited to 'libavfilter/vsrc_nullsrc.c')
| -rw-r--r-- | libavfilter/vsrc_nullsrc.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/libavfilter/vsrc_nullsrc.c b/libavfilter/vsrc_nullsrc.c deleted file mode 100644 index 63e90fdd1a..0000000000 --- a/libavfilter/vsrc_nullsrc.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * 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 - * null video source - */ - -#include <stdio.h> - -#include "libavutil/avstring.h" -#include "libavutil/eval.h" -#include "libavutil/internal.h" -#include "libavutil/mathematics.h" -#include "libavutil/opt.h" -#include "libavutil/parseutils.h" -#include "avfilter.h" -#include "formats.h" -#include "internal.h" - -static const char *const var_names[] = { - "E", - "PHI", - "PI", - "AVTB", /* default timebase 1/AV_TIME_BASE */ - NULL -}; - -enum var_name { - VAR_E, - VAR_PHI, - VAR_PI, - VAR_AVTB, - VAR_VARS_NB -}; - -typedef struct NullContext { - const AVClass *class; - int w, h; - char *tb_expr; - double var_values[VAR_VARS_NB]; -} NullContext; - -static int config_props(AVFilterLink *outlink) -{ - AVFilterContext *ctx = outlink->src; - NullContext *priv = ctx->priv; - AVRational tb; - int ret; - double res; - - priv->var_values[VAR_E] = M_E; - priv->var_values[VAR_PHI] = M_PHI; - priv->var_values[VAR_PI] = M_PI; - priv->var_values[VAR_AVTB] = av_q2d(AV_TIME_BASE_Q); - - if ((ret = av_expr_parse_and_eval(&res, priv->tb_expr, var_names, priv->var_values, - NULL, NULL, NULL, NULL, NULL, 0, NULL)) < 0) { - av_log(ctx, AV_LOG_ERROR, "Invalid expression '%s' for timebase.\n", priv->tb_expr); - return ret; - } - tb = av_d2q(res, INT_MAX); - if (tb.num <= 0 || tb.den <= 0) { - av_log(ctx, AV_LOG_ERROR, - "Invalid non-positive value for the timebase %d/%d.\n", - tb.num, tb.den); - return AVERROR(EINVAL); - } - - outlink->w = priv->w; - outlink->h = priv->h; - outlink->time_base = tb; - - av_log(outlink->src, AV_LOG_VERBOSE, "w:%d h:%d tb:%d/%d\n", priv->w, priv->h, - tb.num, tb.den); - - return 0; -} - -static int request_frame(AVFilterLink *link) -{ - return -1; -} - -#define OFFSET(x) offsetof(NullContext, x) -#define FLAGS AV_OPT_FLAG_VIDEO_PARAM -static const AVOption options[] = { - { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 352 }, 1, INT_MAX, FLAGS }, - { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 288 }, 1, INT_MAX, FLAGS }, - { "timebase", NULL, OFFSET(tb_expr), AV_OPT_TYPE_STRING, { .str = "AVTB" }, 0, 0, FLAGS }, - { NULL }, -}; - -static const AVClass nullsrc_class = { - .class_name = "nullsrc", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, -}; - -static const AVFilterPad avfilter_vsrc_nullsrc_outputs[] = { - { - .name = "default", - .type = AVMEDIA_TYPE_VIDEO, - .config_props = config_props, - .request_frame = request_frame, - }, - { NULL } -}; - -AVFilter ff_vsrc_nullsrc = { - .name = "nullsrc", - .description = NULL_IF_CONFIG_SMALL("Null video source, never return images."), - - .priv_size = sizeof(NullContext), - .priv_class = &nullsrc_class, - - .inputs = NULL, - - .outputs = avfilter_vsrc_nullsrc_outputs, -}; |