diff options
Diffstat (limited to 'libavfilter/vf_setpts.c')
| -rw-r--r-- | libavfilter/vf_setpts.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/libavfilter/vf_setpts.c b/libavfilter/vf_setpts.c deleted file mode 100644 index f2b86a16af..0000000000 --- a/libavfilter/vf_setpts.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * Copyright (c) 2010 Stefano Sabatini - * Copyright (c) 2008 Victor Paesa - * - * 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 - * video presentation timestamp (PTS) modification filter - */ - -/* #define DEBUG */ - -#include "libavutil/eval.h" -#include "libavutil/internal.h" -#include "libavutil/mathematics.h" -#include "avfilter.h" -#include "internal.h" -#include "video.h" - -static const char *const var_names[] = { - "E", ///< Euler number - "INTERLACED", ///< tell if the current frame is interlaced - "N", ///< frame number (starting at zero) - "PHI", ///< golden ratio - "PI", ///< greek pi - "POS", ///< original position in the file of the frame - "PREV_INPTS", ///< previous input PTS - "PREV_OUTPTS", ///< previous output PTS - "PTS", ///< original pts in the file of the frame - "STARTPTS", ///< PTS at start of movie - "TB", ///< timebase - NULL -}; - -enum var_name { - VAR_E, - VAR_INTERLACED, - VAR_N, - VAR_PHI, - VAR_PI, - VAR_POS, - VAR_PREV_INPTS, - VAR_PREV_OUTPTS, - VAR_PTS, - VAR_STARTPTS, - VAR_TB, - VAR_VARS_NB -}; - -typedef struct { - AVExpr *expr; - double var_values[VAR_VARS_NB]; -} SetPTSContext; - -static av_cold int init(AVFilterContext *ctx, const char *args) -{ - SetPTSContext *setpts = ctx->priv; - int ret; - - if ((ret = av_expr_parse(&setpts->expr, args ? args : "PTS", - var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) { - av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", args); - return ret; - } - - setpts->var_values[VAR_E ] = M_E; - setpts->var_values[VAR_N ] = 0.0; - setpts->var_values[VAR_PHI ] = M_PHI; - setpts->var_values[VAR_PI ] = M_PI; - setpts->var_values[VAR_PREV_INPTS ] = NAN; - setpts->var_values[VAR_PREV_OUTPTS] = NAN; - setpts->var_values[VAR_STARTPTS ] = NAN; - return 0; -} - -static int config_input(AVFilterLink *inlink) -{ - SetPTSContext *setpts = inlink->dst->priv; - - setpts->var_values[VAR_TB] = av_q2d(inlink->time_base); - - av_log(inlink->src, AV_LOG_VERBOSE, "TB:%f\n", setpts->var_values[VAR_TB]); - return 0; -} - -#define D2TS(d) (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d)) -#define TS2D(ts) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)) - -static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *inpicref) -{ - SetPTSContext *setpts = inlink->dst->priv; - double d; - AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~0); - - if (!outpicref) - return AVERROR(ENOMEM); - - if (isnan(setpts->var_values[VAR_STARTPTS])) - setpts->var_values[VAR_STARTPTS] = TS2D(inpicref->pts); - - setpts->var_values[VAR_INTERLACED] = inpicref->video->interlaced; - setpts->var_values[VAR_PTS ] = TS2D(inpicref->pts); - setpts->var_values[VAR_POS ] = inpicref->pos == -1 ? NAN : inpicref->pos; - - d = av_expr_eval(setpts->expr, setpts->var_values, NULL); - outpicref->pts = D2TS(d); - -#ifdef DEBUG - av_log(inlink->dst, AV_LOG_DEBUG, - "n:%"PRId64" interlaced:%d pos:%"PRId64" pts:%"PRId64" t:%f -> pts:%"PRId64" t:%f\n", - (int64_t)setpts->var_values[VAR_N], - (int)setpts->var_values[VAR_INTERLACED], - inpicref ->pos, - inpicref ->pts, inpicref ->pts * av_q2d(inlink->time_base), - outpicref->pts, outpicref->pts * av_q2d(inlink->time_base)); -#endif - - setpts->var_values[VAR_N] += 1.0; - setpts->var_values[VAR_PREV_INPTS ] = TS2D(inpicref ->pts); - setpts->var_values[VAR_PREV_OUTPTS] = TS2D(outpicref->pts); - return ff_start_frame(inlink->dst->outputs[0], outpicref); -} - -static av_cold void uninit(AVFilterContext *ctx) -{ - SetPTSContext *setpts = ctx->priv; - av_expr_free(setpts->expr); - setpts->expr = NULL; -} - -static const AVFilterPad avfilter_vf_setpts_inputs[] = { - { - .name = "default", - .type = AVMEDIA_TYPE_VIDEO, - .get_video_buffer = ff_null_get_video_buffer, - .config_props = config_input, - .start_frame = start_frame, - }, - { NULL } -}; - -static const AVFilterPad avfilter_vf_setpts_outputs[] = { - { - .name = "default", - .type = AVMEDIA_TYPE_VIDEO, - }, - { NULL } -}; - -AVFilter avfilter_vf_setpts = { - .name = "setpts", - .description = NULL_IF_CONFIG_SMALL("Set PTS for the output video frame."), - .init = init, - .uninit = uninit, - - .priv_size = sizeof(SetPTSContext), - - .inputs = avfilter_vf_setpts_inputs, - .outputs = avfilter_vf_setpts_outputs, -}; |