mirror of https://git.ffmpeg.org/ffmpeg.git
cmdutils: split per-option code out of parse_options().
This allows options like -target, which are just shortcuts for other options, to work without dummy function for all options they invoke.
This commit is contained in:
Anton Khirnov
parent
7cc8d6385a
commit
2f8e586df1
112
cmdutils.c
112
cmdutils.c
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@ -203,12 +203,66 @@ static inline void prepare_app_arguments(int *argc_ptr, char ***argv_ptr)
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}
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#endif /* WIN32 && !__MINGW32CE__ */
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int parse_option(void *optctx, const char *opt, const char *arg, const OptionDef *options)
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{
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const OptionDef *po;
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int bool_val = 1;
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void *dst;
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po = find_option(options, opt);
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if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
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/* handle 'no' bool option */
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po = find_option(options, opt + 2);
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if (!(po->name && (po->flags & OPT_BOOL)))
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goto unknown_opt;
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bool_val = 0;
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}
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if (!po->name)
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po = find_option(options, "default");
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if (!po->name) {
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unknown_opt:
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av_log(NULL, AV_LOG_ERROR, "Unrecognized option '%s'\n", opt);
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return AVERROR(EINVAL);
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}
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if (po->flags & HAS_ARG && !arg) {
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av_log(NULL, AV_LOG_ERROR, "Missing argument for option '%s'\n", opt);
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return AVERROR(EINVAL);
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}
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/* new-style options contain an offset into optctx, old-style address of
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* a global var*/
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dst = po->flags & (OPT_OFFSET) ? (uint8_t*)optctx + po->u.off : po->u.dst_ptr;
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if (po->flags & OPT_STRING) {
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char *str;
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str = av_strdup(arg);
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*(char**)dst = str;
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} else if (po->flags & OPT_BOOL) {
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*(int*)dst = bool_val;
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} else if (po->flags & OPT_INT) {
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*(int*)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
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} else if (po->flags & OPT_INT64) {
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*(int64_t*)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
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} else if (po->flags & OPT_FLOAT) {
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*(float*)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
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} else if (po->u.func_arg) {
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int ret = po->flags & OPT_FUNC2 ? po->u.func2_arg(optctx, opt, arg) :
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po->u.func_arg(opt, arg);
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if (ret < 0) {
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av_log(NULL, AV_LOG_ERROR, "Failed to set value '%s' for option '%s'\n", arg, opt);
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return ret;
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}
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}
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if (po->flags & OPT_EXIT)
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exit_program(0);
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return !!(po->flags & HAS_ARG);
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}
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void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
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void (* parse_arg_function)(void *, const char*))
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{
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const char *opt, *arg;
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int optindex, handleoptions=1;
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const OptionDef *po;
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const char *opt;
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int optindex, handleoptions = 1, ret;
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/* perform system-dependent conversions for arguments list */
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prepare_app_arguments(&argc, &argv);
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@ -216,64 +270,18 @@ void parse_options(void *optctx, int argc, char **argv, const OptionDef *options
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/* parse options */
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optindex = 1;
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while (optindex < argc) {
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void *dst;
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opt = argv[optindex++];
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if (handleoptions && opt[0] == '-' && opt[1] != '\0') {
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int bool_val = 1;
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if (opt[1] == '-' && opt[2] == '\0') {
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handleoptions = 0;
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continue;
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}
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opt++;
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po= find_option(options, opt);
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if (!po->name && opt[0] == 'n' && opt[1] == 'o') {
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/* handle 'no' bool option */
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po = find_option(options, opt + 2);
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if (!(po->name && (po->flags & OPT_BOOL)))
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goto unknown_opt;
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bool_val = 0;
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}
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if (!po->name)
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po= find_option(options, "default");
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if (!po->name) {
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unknown_opt:
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fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
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if ((ret = parse_option(optctx, opt, argv[optindex], options)) < 0)
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exit_program(1);
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}
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arg = NULL;
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if (po->flags & HAS_ARG) {
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arg = argv[optindex++];
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if (!arg) {
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fprintf(stderr, "%s: missing argument for option '%s'\n", argv[0], opt);
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exit_program(1);
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}
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}
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/* new-style options contain an offset into optctx, old-style address of
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* a global var*/
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dst = po->flags & OPT_OFFSET ? (uint8_t*)optctx + po->u.off : po->u.dst_ptr;
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if (po->flags & OPT_STRING) {
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char *str;
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str = av_strdup(arg);
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*(char**)dst = str;
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} else if (po->flags & OPT_BOOL) {
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*(int*)dst = bool_val;
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} else if (po->flags & OPT_INT) {
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*(int*)dst = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
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} else if (po->flags & OPT_INT64) {
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*(int64_t*)dst = parse_number_or_die(opt, arg, OPT_INT64, INT64_MIN, INT64_MAX);
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} else if (po->flags & OPT_FLOAT) {
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*(float*)dst = parse_number_or_die(opt, arg, OPT_FLOAT, -INFINITY, INFINITY);
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} else if (po->u.func_arg) {
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int ret = po->flags & OPT_FUNC2 ? po->u.func2_arg(optctx, opt, arg) :
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po->u.func_arg(opt, arg);
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if (ret < 0) {
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fprintf(stderr, "%s: failed to set value '%s' for option '%s'\n", argv[0], arg, opt);
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exit_program(1);
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}
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}
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if(po->flags & OPT_EXIT)
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exit_program(0);
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optindex += ret;
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} else {
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if (parse_arg_function)
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parse_arg_function(optctx, opt);
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@ -151,6 +151,13 @@ void show_help_options(const OptionDef *options, const char *msg, int mask, int
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void parse_options(void *optctx, int argc, char **argv, const OptionDef *options,
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void (* parse_arg_function)(void *optctx, const char*));
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/**
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* Parse one given option.
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*
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* @return on success 1 if arg was consumed, 0 otherwise; negative number on error
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*/
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int parse_option(void *optctx, const char *opt, const char *arg, const OptionDef *options);
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/**
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* Check if the given stream matches a stream specifier.
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*
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