mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
417 lines
13 KiB
417 lines
13 KiB
/* |
|
* Copyright (c) 2016 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 |
|
* filter for manipulating frame metadata |
|
*/ |
|
|
|
#include "config_components.h" |
|
|
|
#include <float.h> |
|
|
|
#include "libavutil/avassert.h" |
|
#include "libavutil/avstring.h" |
|
#include "libavutil/eval.h" |
|
#include "libavutil/internal.h" |
|
#include "libavutil/opt.h" |
|
#include "libavutil/timestamp.h" |
|
#include "libavformat/avio.h" |
|
#include "avfilter.h" |
|
#include "audio.h" |
|
#include "filters.h" |
|
#include "video.h" |
|
|
|
enum MetadataMode { |
|
METADATA_SELECT, |
|
METADATA_ADD, |
|
METADATA_MODIFY, |
|
METADATA_DELETE, |
|
METADATA_PRINT, |
|
METADATA_NB |
|
}; |
|
|
|
enum MetadataFunction { |
|
METADATAF_SAME_STR, |
|
METADATAF_STARTS_WITH, |
|
METADATAF_LESS, |
|
METADATAF_EQUAL, |
|
METADATAF_GREATER, |
|
METADATAF_EXPR, |
|
METADATAF_ENDS_WITH, |
|
METADATAF_NB |
|
}; |
|
|
|
static const char *const var_names[] = { |
|
"VALUE1", |
|
"VALUE2", |
|
"FRAMEVAL", |
|
"USERVAL", |
|
NULL |
|
}; |
|
|
|
enum var_name { |
|
VAR_VALUE1, |
|
VAR_VALUE2, |
|
VAR_FRAMEVAL, |
|
VAR_USERVAL, |
|
VAR_VARS_NB |
|
}; |
|
|
|
typedef struct MetadataContext { |
|
const AVClass *class; |
|
|
|
int mode; |
|
char *key; |
|
char *value; |
|
int function; |
|
|
|
char *expr_str; |
|
AVExpr *expr; |
|
double var_values[VAR_VARS_NB]; |
|
|
|
AVIOContext* avio_context; |
|
char *file_str; |
|
|
|
int (*compare)(struct MetadataContext *s, |
|
const char *value1, const char *value2); |
|
void (*print)(AVFilterContext *ctx, const char *msg, ...) av_printf_format(2, 3); |
|
|
|
int direct; // reduces buffering when printing to user-supplied URL |
|
} MetadataContext; |
|
|
|
#define OFFSET(x) offsetof(MetadataContext, x) |
|
#define DEFINE_OPTIONS(filt_name, FLAGS) \ |
|
static const AVOption filt_name##_options[] = { \ |
|
{ "mode", "set a mode of operation", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, METADATA_NB-1, FLAGS, .unit = "mode" }, \ |
|
{ "select", "select frame", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_SELECT }, 0, 0, FLAGS, .unit = "mode" }, \ |
|
{ "add", "add new metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_ADD }, 0, 0, FLAGS, .unit = "mode" }, \ |
|
{ "modify", "modify metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_MODIFY }, 0, 0, FLAGS, .unit = "mode" }, \ |
|
{ "delete", "delete metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_DELETE }, 0, 0, FLAGS, .unit = "mode" }, \ |
|
{ "print", "print metadata", 0, AV_OPT_TYPE_CONST, {.i64 = METADATA_PRINT }, 0, 0, FLAGS, .unit = "mode" }, \ |
|
{ "key", "set metadata key", OFFSET(key), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \ |
|
{ "value", "set metadata value", OFFSET(value), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \ |
|
{ "function", "function for comparing values", OFFSET(function), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, METADATAF_NB-1, FLAGS, .unit = "function" }, \ |
|
{ "same_str", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_SAME_STR }, 0, 3, FLAGS, .unit = "function" }, \ |
|
{ "starts_with", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_STARTS_WITH }, 0, 0, FLAGS, .unit = "function" }, \ |
|
{ "less", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_LESS }, 0, 3, FLAGS, .unit = "function" }, \ |
|
{ "equal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EQUAL }, 0, 3, FLAGS, .unit = "function" }, \ |
|
{ "greater", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_GREATER }, 0, 3, FLAGS, .unit = "function" }, \ |
|
{ "expr", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_EXPR }, 0, 3, FLAGS, .unit = "function" }, \ |
|
{ "ends_with", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = METADATAF_ENDS_WITH }, 0, 0, FLAGS, .unit = "function" }, \ |
|
{ "expr", "set expression for expr function", OFFSET(expr_str), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, FLAGS }, \ |
|
{ "file", "set file where to print metadata information", OFFSET(file_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS }, \ |
|
{ "direct", "reduce buffering when printing to user-set file or pipe", OFFSET(direct), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS }, \ |
|
{ NULL } \ |
|
} |
|
|
|
static int same_str(MetadataContext *s, const char *value1, const char *value2) |
|
{ |
|
return !strcmp(value1, value2); |
|
} |
|
|
|
static int starts_with(MetadataContext *s, const char *value1, const char *value2) |
|
{ |
|
return !strncmp(value1, value2, strlen(value2)); |
|
} |
|
|
|
static int ends_with(MetadataContext *s, const char *value1, const char *value2) |
|
{ |
|
const int len1 = strlen(value1); |
|
const int len2 = strlen(value2); |
|
|
|
return !strncmp(value1 + FFMAX(len1 - len2, 0), value2, len2); |
|
} |
|
|
|
static int equal(MetadataContext *s, const char *value1, const char *value2) |
|
{ |
|
float f1, f2; |
|
|
|
if (sscanf(value1, "%f", &f1) + sscanf(value2, "%f", &f2) != 2) |
|
return 0; |
|
|
|
return fabsf(f1 - f2) < FLT_EPSILON; |
|
} |
|
|
|
static int less(MetadataContext *s, const char *value1, const char *value2) |
|
{ |
|
float f1, f2; |
|
|
|
if (sscanf(value1, "%f", &f1) + sscanf(value2, "%f", &f2) != 2) |
|
return 0; |
|
|
|
return (f1 - f2) < FLT_EPSILON; |
|
} |
|
|
|
static int greater(MetadataContext *s, const char *value1, const char *value2) |
|
{ |
|
float f1, f2; |
|
|
|
if (sscanf(value1, "%f", &f1) + sscanf(value2, "%f", &f2) != 2) |
|
return 0; |
|
|
|
return (f2 - f1) < FLT_EPSILON; |
|
} |
|
|
|
static int parse_expr(MetadataContext *s, const char *value1, const char *value2) |
|
{ |
|
double f1, f2; |
|
|
|
if (sscanf(value1, "%lf", &f1) + sscanf(value2, "%lf", &f2) != 2) |
|
return 0; |
|
|
|
s->var_values[VAR_VALUE1] = s->var_values[VAR_FRAMEVAL] = f1; |
|
s->var_values[VAR_VALUE2] = s->var_values[VAR_USERVAL] = f2; |
|
|
|
return av_expr_eval(s->expr, s->var_values, NULL); |
|
} |
|
|
|
static void print_log(AVFilterContext *ctx, const char *msg, ...) |
|
{ |
|
va_list argument_list; |
|
|
|
va_start(argument_list, msg); |
|
if (msg) |
|
av_vlog(ctx, AV_LOG_INFO, msg, argument_list); |
|
va_end(argument_list); |
|
} |
|
|
|
static void print_file(AVFilterContext *ctx, const char *msg, ...) |
|
{ |
|
MetadataContext *s = ctx->priv; |
|
va_list argument_list; |
|
|
|
va_start(argument_list, msg); |
|
if (msg) { |
|
char buf[128]; |
|
vsnprintf(buf, sizeof(buf), msg, argument_list); |
|
avio_write(s->avio_context, buf, av_strnlen(buf, sizeof(buf))); |
|
} |
|
va_end(argument_list); |
|
} |
|
|
|
static av_cold int init(AVFilterContext *ctx) |
|
{ |
|
MetadataContext *s = ctx->priv; |
|
int ret; |
|
|
|
if (!s->key && s->mode != METADATA_PRINT && s->mode != METADATA_DELETE) { |
|
av_log(ctx, AV_LOG_WARNING, "Metadata key must be set\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
if ((s->mode == METADATA_MODIFY || |
|
s->mode == METADATA_ADD) && !s->value) { |
|
av_log(ctx, AV_LOG_WARNING, "Missing metadata value\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
switch (s->function) { |
|
case METADATAF_SAME_STR: |
|
s->compare = same_str; |
|
break; |
|
case METADATAF_STARTS_WITH: |
|
s->compare = starts_with; |
|
break; |
|
case METADATAF_ENDS_WITH: |
|
s->compare = ends_with; |
|
break; |
|
case METADATAF_LESS: |
|
s->compare = less; |
|
break; |
|
case METADATAF_EQUAL: |
|
s->compare = equal; |
|
break; |
|
case METADATAF_GREATER: |
|
s->compare = greater; |
|
break; |
|
case METADATAF_EXPR: |
|
s->compare = parse_expr; |
|
break; |
|
default: |
|
av_assert0(0); |
|
}; |
|
|
|
if (s->function == METADATAF_EXPR) { |
|
if (!s->expr_str) { |
|
av_log(ctx, AV_LOG_WARNING, "expr option not set\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
if ((ret = av_expr_parse(&s->expr, s->expr_str, |
|
var_names, NULL, NULL, NULL, NULL, 0, ctx)) < 0) { |
|
av_log(ctx, AV_LOG_ERROR, "Error while parsing expression '%s'\n", s->expr_str); |
|
return ret; |
|
} |
|
} |
|
|
|
if (s->mode == METADATA_PRINT && s->file_str) { |
|
s->print = print_file; |
|
} else { |
|
s->print = print_log; |
|
} |
|
|
|
s->avio_context = NULL; |
|
if (s->file_str) { |
|
if (!strcmp("-", s->file_str)) { |
|
ret = avio_open(&s->avio_context, "pipe:1", AVIO_FLAG_WRITE); |
|
} else { |
|
ret = avio_open(&s->avio_context, s->file_str, AVIO_FLAG_WRITE); |
|
} |
|
|
|
if (ret < 0) { |
|
av_log(ctx, AV_LOG_ERROR, "Could not open %s: %s\n", |
|
s->file_str, av_err2str(ret)); |
|
return ret; |
|
} |
|
|
|
if (s->direct) |
|
s->avio_context->direct = AVIO_FLAG_DIRECT; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static av_cold void uninit(AVFilterContext *ctx) |
|
{ |
|
MetadataContext *s = ctx->priv; |
|
|
|
av_expr_free(s->expr); |
|
s->expr = NULL; |
|
if (s->avio_context) { |
|
avio_closep(&s->avio_context); |
|
} |
|
} |
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
|
{ |
|
FilterLink *inl = ff_filter_link(inlink); |
|
AVFilterContext *ctx = inlink->dst; |
|
AVFilterLink *outlink = ctx->outputs[0]; |
|
MetadataContext *s = ctx->priv; |
|
AVDictionary **metadata = &frame->metadata; |
|
const AVDictionaryEntry *e; |
|
|
|
e = av_dict_get(*metadata, !s->key ? "" : s->key, NULL, |
|
!s->key ? AV_DICT_IGNORE_SUFFIX: 0); |
|
|
|
switch (s->mode) { |
|
case METADATA_SELECT: |
|
if (!s->value && e && e->value) { |
|
return ff_filter_frame(outlink, frame); |
|
} else if (s->value && e && e->value && |
|
s->compare(s, e->value, s->value)) { |
|
return ff_filter_frame(outlink, frame); |
|
} |
|
break; |
|
case METADATA_ADD: |
|
if (e && e->value) { |
|
; |
|
} else { |
|
av_dict_set(metadata, s->key, s->value, 0); |
|
} |
|
return ff_filter_frame(outlink, frame); |
|
case METADATA_MODIFY: |
|
if (e && e->value) { |
|
av_dict_set(metadata, s->key, s->value, 0); |
|
} |
|
return ff_filter_frame(outlink, frame); |
|
case METADATA_PRINT: |
|
if (!s->key && e) { |
|
s->print(ctx, "frame:%-4"PRId64" pts:%-7s pts_time:%s\n", |
|
inl->frame_count_out, av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base)); |
|
s->print(ctx, "%s=%s\n", e->key, e->value); |
|
while ((e = av_dict_iterate(*metadata, e)) != NULL) { |
|
s->print(ctx, "%s=%s\n", e->key, e->value); |
|
} |
|
} else if (e && e->value && (!s->value || (e->value && s->compare(s, e->value, s->value)))) { |
|
s->print(ctx, "frame:%-4"PRId64" pts:%-7s pts_time:%s\n", |
|
inl->frame_count_out, av_ts2str(frame->pts), av_ts2timestr(frame->pts, &inlink->time_base)); |
|
s->print(ctx, "%s=%s\n", s->key, e->value); |
|
} |
|
return ff_filter_frame(outlink, frame); |
|
case METADATA_DELETE: |
|
if (!s->key) { |
|
av_dict_free(metadata); |
|
} else if (e && e->value && (!s->value || s->compare(s, e->value, s->value))) { |
|
av_dict_set(metadata, s->key, NULL, 0); |
|
} |
|
return ff_filter_frame(outlink, frame); |
|
default: |
|
av_assert0(0); |
|
}; |
|
|
|
av_frame_free(&frame); |
|
|
|
return 0; |
|
} |
|
|
|
#if CONFIG_AMETADATA_FILTER |
|
|
|
DEFINE_OPTIONS(ametadata, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM); |
|
AVFILTER_DEFINE_CLASS(ametadata); |
|
|
|
static const AVFilterPad ainputs[] = { |
|
{ |
|
.name = "default", |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
.filter_frame = filter_frame, |
|
}, |
|
}; |
|
|
|
const AVFilter ff_af_ametadata = { |
|
.name = "ametadata", |
|
.description = NULL_IF_CONFIG_SMALL("Manipulate audio frame metadata."), |
|
.priv_size = sizeof(MetadataContext), |
|
.priv_class = &ametadata_class, |
|
.init = init, |
|
.uninit = uninit, |
|
FILTER_INPUTS(ainputs), |
|
FILTER_OUTPUTS(ff_audio_default_filterpad), |
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | |
|
AVFILTER_FLAG_METADATA_ONLY, |
|
}; |
|
#endif /* CONFIG_AMETADATA_FILTER */ |
|
|
|
#if CONFIG_METADATA_FILTER |
|
|
|
DEFINE_OPTIONS(metadata, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM); |
|
AVFILTER_DEFINE_CLASS(metadata); |
|
|
|
static const AVFilterPad inputs[] = { |
|
{ |
|
.name = "default", |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.filter_frame = filter_frame, |
|
}, |
|
}; |
|
|
|
const AVFilter ff_vf_metadata = { |
|
.name = "metadata", |
|
.description = NULL_IF_CONFIG_SMALL("Manipulate video frame metadata."), |
|
.priv_size = sizeof(MetadataContext), |
|
.priv_class = &metadata_class, |
|
.init = init, |
|
.uninit = uninit, |
|
FILTER_INPUTS(inputs), |
|
FILTER_OUTPUTS(ff_video_default_filterpad), |
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | |
|
AVFILTER_FLAG_METADATA_ONLY, |
|
}; |
|
#endif /* CONFIG_METADATA_FILTER */
|
|
|