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webpmux: add an '-set loop <value>' option

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This allows to change the loop count option on animated files.

BUG=webp:494

Change-Id: I6849f56d7bff8b33a94f14b409e40f99789009ad
This commit is contained in:
Pascal Massimino 2020-12-12 09:27:38 +01:00 committed by Pascal Massimino
parent c9a3f6a1d0
commit cccf5e337a
3 changed files with 42 additions and 1 deletions
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1
README.mux
View File

@ -44,6 +44,7 @@ GET_OPTIONS:
SET_OPTIONS:
Set color profile/metadata:
loop LOOP_COUNT set the loop count
icc file.icc set ICC profile
exif file.exif set EXIF metadata
xmp file.xmp set XMP metadata

35
examples/webpmux.c
View File

@ -26,6 +26,7 @@
webpmux -set icc image_profile.icc in.webp -o out_icc_container.webp
webpmux -set exif image_metadata.exif in.webp -o out_exif_container.webp
webpmux -set xmp image_metadata.xmp in.webp -o out_xmp_container.webp
webpmux -set loop 1 in.webp -o out_looped.webp
Extract relevant data from WebP container file:
webpmux -get frame n in.webp -o out_frame.webp
@ -97,6 +98,7 @@ typedef enum {
FEATURE_ICCP,
FEATURE_ANMF,
FEATURE_DURATION,
FEATURE_LOOP,
LAST_FEATURE
} FeatureType;
@ -314,6 +316,7 @@ static void PrintHelp(void) {
printf("\n");
printf("SET_OPTIONS:\n");
printf(" Set color profile/metadata:\n");
printf(" loop LOOP_COUNT set the loop count\n");
printf(" icc file.icc set ICC profile\n");
printf(" exif file.exif set EXIF metadata\n");
printf(" xmp file.xmp set XMP metadata\n");
@ -768,6 +771,13 @@ static int ParseCommandLine(Config* config, const W_CHAR** const unicode_argv) {
arg->params_ = argv[i + 1];
++feature_arg_index;
i += 2;
} else if (!strcmp(argv[i], "loop") &&
(config->action_type_ == ACTION_SET)) {
CHECK_NUM_ARGS_AT_LEAST(2, ErrParse);
config->type_ = FEATURE_LOOP;
arg->params_ = argv[i + 1];
++feature_arg_index;
i += 2;
} else { // Assume input file.
if (config->input_ == NULL) {
config->input_ = wargv[i];
@ -1018,6 +1028,31 @@ static int Process(const Config* config) {
}
break;
}
case FEATURE_LOOP: {
WebPMuxAnimParams params = { 0xFFFFFFFF, 0 };
int parse_error = 0;
const int loop_count =
ExUtilGetInt(config->args_[0].params_, 10, &parse_error);
if (loop_count < 0 || loop_count > 65535 || parse_error) {
ERROR_GOTO1("ERROR: Loop count must be in the range 0 to 65535.\n",
Err2);
}
ok = CreateMux(config->input_, &mux);
if (!ok) goto Err2;
ok = (WebPMuxGetAnimationParams(mux, &params) == WEBP_MUX_OK);
if (!ok) {
ERROR_GOTO1("ERROR: input file does not seem to be an animation.\n",
Err2);
}
params.loop_count = loop_count;
err = WebPMuxSetAnimationParams(mux, &params);
ok = (err == WEBP_MUX_OK);
if (!ok) {
ERROR_GOTO2("ERROR (%s): Could not set animation parameters.\n",
ErrorString(err), Err2);
}
break;
}
default: {
ERROR_GOTO1("ERROR: Invalid feature for action 'set'.\n", Err2);
break;

7
man/webpmux.1
View File

@ -1,5 +1,5 @@
.\" Hey, EMACS: -*- nroff -*-
.TH WEBPMUX 1 "May 1, 2020"
.TH WEBPMUX 1 "December 12, 2020"
.SH NAME
webpmux \- create animated WebP files from non\-animated WebP images, extract
frames from animated WebP images, and manage XMP/EXIF metadata and ICC profile.
@ -77,6 +77,11 @@ Get nth frame from an animated image. (n = 0 has a special meaning: last frame).
.SS SET_OPTIONS (\-set)
.TP
.BI loop " loop_count
Set loop count on an animated file.
.P
Where: 'loop_count' must be in range [0, 65535].
.TP
.BI icc " file.icc
Set ICC profile.
.P