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fftools/ffmpeg_mux_init: improve of_add_programs() 

Replace duplicated(!) and broken* custom string parsing with
av_dict_parse_string(). Return error codes instead of aborting.

* e.g. it treats NULL returned from av_get_token() as "separator not
  found", when in fact av_get_token() only returns NULL on memory
  allocation failure
This commit is contained in:
Anton Khirnov 2023-07-12 17:58:53 +02:00
parent fd40197170
commit dd44871eb9
1 changed files with 52 additions and 59 deletions
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111
fftools/ffmpeg_mux_init.c
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@ -1782,76 +1782,66 @@ static int setup_sync_queues(Muxer *mux, AVFormatContext *oc, int64_t buf_size_u
return 0;
}
static void of_add_programs(Muxer *mux, const OptionsContext *o)
static int of_add_programs(Muxer *mux, const OptionsContext *o)
{
AVFormatContext *oc = mux->fc;
/* process manually set programs */
for (int i = 0; i < o->nb_program; i++) {
const char *p = o->program[i].u.str;
int progid = i+1;
AVDictionary *dict = NULL;
const AVDictionaryEntry *e;
AVProgram *program;
int ret, progid = i + 1;
while(*p) {
const char *p2 = av_get_token(&p, ":");
const char *to_dealloc = p2;
char *key;
if (!p2)
break;
ret = av_dict_parse_string(&dict, o->program[i].u.str, "=", ":",
AV_DICT_MULTIKEY);
if (ret < 0) {
av_log(mux, AV_LOG_ERROR, "Error parsing program specification %s\n",
o->program[i].u.str);
return ret;
}
if(*p) p++;
key = av_get_token(&p2, "=");
if (!key || !*p2) {
av_freep(&to_dealloc);
av_freep(&key);
break;
}
p2++;
if (!strcmp(key, "program_num"))
progid = strtol(p2, NULL, 0);
av_freep(&to_dealloc);
av_freep(&key);
e = av_dict_get(dict, "program_num", NULL, 0);
if (e) {
progid = strtol(e->value, NULL, 0);
av_dict_set(&dict, e->key, NULL, 0);
}
program = av_new_program(oc, progid);
if (!program)
report_and_exit(AVERROR(ENOMEM));
p = o->program[i].u.str;
while(*p) {
const char *p2 = av_get_token(&p, ":");
const char *to_dealloc = p2;
char *key;
if (!p2)
break;
if(*p) p++;
key = av_get_token(&p2, "=");
if (!key) {
av_log(mux, AV_LOG_FATAL,
"No '=' character in program string %s.\n",
p2);
exit_program(1);
}
if (!*p2)
exit_program(1);
p2++;
if (!strcmp(key, "title")) {
av_dict_set(&program->metadata, "title", p2, 0);
} else if (!strcmp(key, "program_num")) {
} else if (!strcmp(key, "st")) {
int st_num = strtol(p2, NULL, 0);
av_program_add_stream_index(oc, progid, st_num);
} else {
av_log(mux, AV_LOG_FATAL, "Unknown program key %s.\n", key);
exit_program(1);
}
av_freep(&to_dealloc);
av_freep(&key);
if (!program) {
ret = AVERROR(ENOMEM);
goto fail;
}
e = av_dict_get(dict, "title", NULL, 0);
if (e) {
av_dict_set(&program->metadata, e->key, e->value, 0);
av_dict_set(&dict, e->key, NULL, 0);
}
e = NULL;
while (e = av_dict_get(dict, "st", e, 0)) {
int st_num = strtol(e->value, NULL, 0);
av_program_add_stream_index(oc, progid, st_num);
}
// make sure that nothing but "st" entries are left in the dict
e = NULL;
while (e = av_dict_iterate(dict, e)) {
if (!strcmp(e->key, "st"))
continue;
av_log(mux, AV_LOG_FATAL, "Unknown program key %s.\n", e->key);
ret = AVERROR(EINVAL);
goto fail;
}
fail:
av_dict_free(&dict);
if (ret < 0)
return ret;
}
return 0;
}
/**
@ -2547,7 +2537,10 @@ int of_open(const OptionsContext *o, const char *filename)
if (err < 0)
return err;
of_add_programs(mux, o);
err = of_add_programs(mux, o);
if (err < 0)
return err;
of_add_metadata(of, oc, o);
err = set_dispositions(mux, o);