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fftools/ffmpeg: merge choose_output() and got_eagain()

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These two functions are a part of a single logical action - determining
which, if any, output stream needs to be processed next. Keeping them
separate is a historical artifact that obscures what is actually being
done.
This commit is contained in:
Anton Khirnov 2023-04-29 22:35:37 +02:00
parent f009f84961
commit 5673da4797
1 changed files with 19 additions and 22 deletions
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41
fftools/ffmpeg.c
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@ -1683,9 +1683,11 @@ static int need_output(void)
/**
* Select the output stream to process.
*
* @return selected output stream, or NULL if none available
* @retval 0 an output stream was selected
* @retval AVERROR(EAGAIN) need to wait until more input is available
* @retval AVERROR_EOF no more streams need output
*/
static OutputStream *choose_output(void)
static int choose_output(OutputStream **post)
{
int64_t opts_min = INT64_MAX;
OutputStream *ost_min = NULL;
@ -1704,15 +1706,19 @@ static OutputStream *choose_output(void)
ost->initialized, ost->inputs_done, ost->finished);
}
if (!ost->initialized && !ost->inputs_done && !ost->finished)
return ost->unavailable ? NULL : ost;
if (!ost->initialized && !ost->inputs_done && !ost->finished) {
ost_min = ost;
break;
}
if (!ost->finished && opts < opts_min) {
opts_min = opts;
ost_min = ost->unavailable ? NULL : ost;
ost_min = ost;
}
}
return ost_min;
if (!ost_min)
return AVERROR_EOF;
*post = ost_min;
return ost_min->unavailable ? AVERROR(EAGAIN) : 0;
}
static void set_tty_echo(int on)
@ -1800,14 +1806,6 @@ static int check_keyboard_interaction(int64_t cur_time)
return 0;
}
static int got_eagain(void)
{
for (OutputStream *ost = ost_iter(NULL); ost; ost = ost_iter(ost))
if (ost->unavailable)
return 1;
return 0;
}
static void reset_eagain(void)
{
int i;
@ -2052,13 +2050,12 @@ static int transcode_step(void)
InputStream *ist = NULL;
int ret;
ost = choose_output();
if (!ost) {
if (got_eagain()) {
reset_eagain();
av_usleep(10000);
return 0;
}
ret = choose_output(&ost);
if (ret == AVERROR(EAGAIN)) {
reset_eagain();
av_usleep(10000);
return 0;
} else if (ret < 0) {
av_log(NULL, AV_LOG_VERBOSE, "No more inputs to read from, finishing.\n");
return AVERROR_EOF;
}