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fftools/cmdutils.c: Add cmd line option to override detection of cpu count.

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This commit is contained in:
Thilo Borgmann 2021-06-06 15:15:50 +02:00
parent 87951dcbe7
commit cf12a478b2
3 changed files with 41 additions and 0 deletions
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7
doc/fftools-common-opts.texi
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@ -353,6 +353,13 @@ Possible flags for this option are:
@end table
@end table
@item -cpucount @var{count} (@emph{global})
Override detection of CPU count. This option is intended
for testing. Do not use it unless you know what you're doing.
@example
ffmpeg -cpucount 2
@end example
@item -max_alloc @var{bytes}
Set the maximum size limit for allocating a block on the heap by ffmpeg's
family of malloc functions. Exercise @strong{extreme caution} when using

27
fftools/cmdutils.c
View File

@ -71,6 +71,7 @@ AVDictionary *format_opts, *codec_opts, *resample_opts;
static FILE *report_file;
static int report_file_level = AV_LOG_DEBUG;
int hide_banner = 0;
int cpu_count = -1;
enum show_muxdemuxers {
SHOW_DEFAULT,
@ -853,6 +854,32 @@ int opt_cpuflags(void *optctx, const char *opt, const char *arg)
return 0;
}
int opt_cpucount(void *optctx, const char *opt, const char *arg)
{
int ret;
int count;
static const AVOption opts[] = {
{"count", NULL, 0, AV_OPT_TYPE_INT, { .i64 = -1}, -1, INT_MAX, NULL},
{NULL},
};
static const AVClass class = {
.class_name = "cpucount",
.item_name = av_default_item_name,
.option = opts,
.version = LIBAVUTIL_VERSION_INT,
};
const AVClass *pclass = &class;
ret = av_opt_eval_int(&pclass, opts, arg, &count);
if (!ret) {
av_force_cpu_count(count);
}
return ret;
}
int opt_loglevel(void *optctx, const char *opt, const char *arg)
{
const struct { const char *name; int level; } log_levels[] = {

7
fftools/cmdutils.h
View File

@ -50,6 +50,7 @@ extern AVDictionary *sws_dict;
extern AVDictionary *swr_opts;
extern AVDictionary *format_opts, *codec_opts, *resample_opts;
extern int hide_banner;
extern int cpu_count;
/**
* Register a program-specific cleanup routine.
@ -88,6 +89,11 @@ void log_callback_help(void* ptr, int level, const char* fmt, va_list vl);
*/
int opt_cpuflags(void *optctx, const char *opt, const char *arg);
/**
* Override the cpucount.
*/
int opt_cpucount(void *optctx, const char *opt, const char *arg);
/**
* Fallback for options that are not explicitly handled, these will be
* parsed through AVOptions.
@ -239,6 +245,7 @@ void show_help_options(const OptionDef *options, const char *msg, int req_flags,
{ "report", 0, { .func_arg = opt_report }, "generate a report" }, \
{ "max_alloc", HAS_ARG, { .func_arg = opt_max_alloc }, "set maximum size of a single allocated block", "bytes" }, \
{ "cpuflags", HAS_ARG | OPT_EXPERT, { .func_arg = opt_cpuflags }, "force specific cpu flags", "flags" }, \
{ "cpucount", HAS_ARG | OPT_EXPERT, { .func_arg = opt_cpucount }, "force specific cpu count", "count" }, \
{ "hide_banner", OPT_BOOL | OPT_EXPERT, {&hide_banner}, "do not show program banner", "hide_banner" }, \
CMDUTILS_COMMON_OPTIONS_AVDEVICE \