+enum OptGroup {
+ GROUP_OUTFILE,
+ GROUP_INFILE,
+};
+
+static const OptionGroupDef groups[] = {
+ [GROUP_OUTFILE] = { "output file", NULL, OPT_OUTPUT },
+ [GROUP_INFILE] = { "input file", "i", OPT_INPUT },
+};
+
+static int open_files(OptionGroupList *l, const char *inout,
+ int (*open_file)(OptionsContext*, const char*))
+{
+ int i, ret;
+
+ for (i = 0; i < l->nb_groups; i++) {
+ OptionGroup *g = &l->groups[i];
+ OptionsContext o;
+
+ init_options(&o);
+ o.g = g;
+
+ ret = parse_optgroup(&o, g);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_ERROR, "Error parsing options for %s file "
+ "%s.\n", inout, g->arg);
+ return ret;
+ }
+
+ av_log(NULL, AV_LOG_DEBUG, "Opening an %s file: %s.\n", inout, g->arg);
+ ret = open_file(&o, g->arg);
+ uninit_options(&o);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_ERROR, "Error opening %s file %s.\n",
+ inout, g->arg);
+ return ret;
+ }
+ av_log(NULL, AV_LOG_DEBUG, "Successfully opened the file.\n");
+ }
+
+ return 0;
+}
+
+int avconv_parse_options(int argc, char **argv)
+{
+ OptionParseContext octx;
+ uint8_t error[128];
+ int ret;
+
+ memset(&octx, 0, sizeof(octx));
+
+ /* split the commandline into an internal representation */
+ ret = split_commandline(&octx, argc, argv, options, groups,
+ FF_ARRAY_ELEMS(groups));
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_FATAL, "Error splitting the argument list: ");
+ goto fail;
+ }
+
+ /* apply global options */
+ ret = parse_optgroup(NULL, &octx.global_opts);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_FATAL, "Error parsing global options: ");
+ goto fail;
+ }
+
+ /* open input files */
+ ret = open_files(&octx.groups[GROUP_INFILE], "input", open_input_file);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_FATAL, "Error opening input files: ");
+ goto fail;
+ }
+
+ /* open output files */
+ ret = open_files(&octx.groups[GROUP_OUTFILE], "output", open_output_file);
+ if (ret < 0) {
+ av_log(NULL, AV_LOG_FATAL, "Error opening output files: ");
+ goto fail;
+ }
+
+fail:
+ uninit_parse_context(&octx);
+ if (ret < 0) {
+ av_strerror(ret, error, sizeof(error));
+ av_log(NULL, AV_LOG_FATAL, "%s\n", error);
+ }
+ return ret;
+}