mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
25c8507818
Also remove other unnecessary headers and include headers directly while at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
224 lines
6.4 KiB
C
224 lines
6.4 KiB
C
/*
|
|
* Copyright (c) 2021 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Change the PTS/DTS timestamps.
|
|
*/
|
|
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/eval.h"
|
|
|
|
#include "bsf.h"
|
|
#include "bsf_internal.h"
|
|
|
|
static const char *const var_names[] = {
|
|
"N", ///< frame number (starting at zero)
|
|
"TS",
|
|
"POS", ///< original position in the file of the frame
|
|
"PREV_INPTS", ///< previous input PTS
|
|
"PREV_INDTS", ///< previous input DTS
|
|
"PREV_OUTPTS", ///< previous output PTS
|
|
"PREV_OUTDTS", ///< previous output DTS
|
|
"PTS", ///< original PTS in the file of the frame
|
|
"DTS", ///< original DTS in the file of the frame
|
|
"STARTPTS", ///< PTS at start of movie
|
|
"STARTDTS", ///< DTS at start of movie
|
|
"TB", ///< timebase of the stream
|
|
"SR", ///< sample rate of the stream
|
|
"NOPTS", ///< The AV_NOPTS_VALUE constant
|
|
NULL
|
|
};
|
|
|
|
enum var_name {
|
|
VAR_N,
|
|
VAR_TS,
|
|
VAR_POS,
|
|
VAR_PREV_INPTS,
|
|
VAR_PREV_INDTS,
|
|
VAR_PREV_OUTPTS,
|
|
VAR_PREV_OUTDTS,
|
|
VAR_PTS,
|
|
VAR_DTS,
|
|
VAR_STARTPTS,
|
|
VAR_STARTDTS,
|
|
VAR_TB,
|
|
VAR_SR,
|
|
VAR_NOPTS,
|
|
VAR_VARS_NB
|
|
};
|
|
|
|
typedef struct SetTSContext {
|
|
const AVClass *class;
|
|
|
|
char *ts_str;
|
|
char *pts_str;
|
|
char *dts_str;
|
|
|
|
int64_t frame_number;
|
|
|
|
int64_t start_pts;
|
|
int64_t start_dts;
|
|
int64_t prev_inpts;
|
|
int64_t prev_indts;
|
|
int64_t prev_outpts;
|
|
int64_t prev_outdts;
|
|
|
|
double var_values[VAR_VARS_NB];
|
|
|
|
AVExpr *ts_expr;
|
|
AVExpr *pts_expr;
|
|
AVExpr *dts_expr;
|
|
} SetTSContext;
|
|
|
|
static int setts_init(AVBSFContext *ctx)
|
|
{
|
|
SetTSContext *s = ctx->priv_data;
|
|
int ret;
|
|
|
|
if ((ret = av_expr_parse(&s->ts_expr, s->ts_str,
|
|
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error while parsing ts expression '%s'\n", s->ts_str);
|
|
return ret;
|
|
}
|
|
|
|
if (s->pts_str) {
|
|
if ((ret = av_expr_parse(&s->pts_expr, s->pts_str,
|
|
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error while parsing pts expression '%s'\n", s->pts_str);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (s->dts_str) {
|
|
if ((ret = av_expr_parse(&s->dts_expr, s->dts_str,
|
|
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Error while parsing dts expression '%s'\n", s->dts_str);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
s->frame_number= 0;
|
|
s->start_pts = AV_NOPTS_VALUE;
|
|
s->start_dts = AV_NOPTS_VALUE;
|
|
s->prev_inpts = AV_NOPTS_VALUE;
|
|
s->prev_indts = AV_NOPTS_VALUE;
|
|
s->prev_outpts = AV_NOPTS_VALUE;
|
|
s->prev_outdts = AV_NOPTS_VALUE;
|
|
s->var_values[VAR_NOPTS] = AV_NOPTS_VALUE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int setts_filter(AVBSFContext *ctx, AVPacket *pkt)
|
|
{
|
|
SetTSContext *s = ctx->priv_data;
|
|
int64_t new_ts, new_pts, new_dts;
|
|
int ret;
|
|
|
|
ret = ff_bsf_get_packet_ref(ctx, pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (s->start_pts == AV_NOPTS_VALUE)
|
|
s->start_pts = pkt->pts;
|
|
|
|
if (s->start_dts == AV_NOPTS_VALUE)
|
|
s->start_dts = pkt->dts;
|
|
|
|
s->var_values[VAR_N] = s->frame_number++;
|
|
s->var_values[VAR_TS] = pkt->dts;
|
|
s->var_values[VAR_POS] = pkt->pos;
|
|
s->var_values[VAR_PTS] = pkt->pts;
|
|
s->var_values[VAR_DTS] = pkt->dts;
|
|
s->var_values[VAR_PREV_INPTS] = s->prev_inpts;
|
|
s->var_values[VAR_PREV_INDTS] = s->prev_indts;
|
|
s->var_values[VAR_PREV_OUTPTS] = s->prev_outpts;
|
|
s->var_values[VAR_PREV_OUTDTS] = s->prev_outdts;
|
|
s->var_values[VAR_STARTPTS] = s->start_pts;
|
|
s->var_values[VAR_STARTDTS] = s->start_dts;
|
|
s->var_values[VAR_TB] = ctx->time_base_out.den ? av_q2d(ctx->time_base_out) : 0;
|
|
s->var_values[VAR_SR] = ctx->par_in->sample_rate;
|
|
|
|
new_ts = llrint(av_expr_eval(s->ts_expr, s->var_values, NULL));
|
|
|
|
if (s->pts_str) {
|
|
s->var_values[VAR_TS] = pkt->pts;
|
|
new_pts = llrint(av_expr_eval(s->pts_expr, s->var_values, NULL));
|
|
} else {
|
|
new_pts = new_ts;
|
|
}
|
|
|
|
if (s->dts_str) {
|
|
s->var_values[VAR_TS] = pkt->dts;
|
|
new_dts = llrint(av_expr_eval(s->dts_expr, s->var_values, NULL));
|
|
} else {
|
|
new_dts = new_ts;
|
|
}
|
|
|
|
s->prev_inpts = pkt->pts;
|
|
s->prev_indts = pkt->dts;
|
|
s->prev_outpts = new_pts;
|
|
s->prev_outdts = new_dts;
|
|
|
|
pkt->pts = new_pts;
|
|
pkt->dts = new_dts;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void setts_close(AVBSFContext *bsf)
|
|
{
|
|
SetTSContext *s = bsf->priv_data;
|
|
|
|
av_expr_free(s->ts_expr);
|
|
s->ts_expr = NULL;
|
|
av_expr_free(s->pts_expr);
|
|
s->pts_expr = NULL;
|
|
av_expr_free(s->dts_expr);
|
|
s->dts_expr = NULL;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(SetTSContext, x)
|
|
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_BSF_PARAM)
|
|
|
|
static const AVOption options[] = {
|
|
{ "ts", "set expression for packet PTS and DTS", OFFSET(ts_str), AV_OPT_TYPE_STRING, {.str="TS"}, 0, 0, FLAGS },
|
|
{ "pts", "set expression for packet PTS", OFFSET(pts_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
|
|
{ "dts", "set expression for packet DTS", OFFSET(dts_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass setts_class = {
|
|
.class_name = "setts_bsf",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
const AVBitStreamFilter ff_setts_bsf = {
|
|
.name = "setts",
|
|
.priv_data_size = sizeof(SetTSContext),
|
|
.priv_class = &setts_class,
|
|
.init = setts_init,
|
|
.close = setts_close,
|
|
.filter = setts_filter,
|
|
};
|