From 0694d8702421e7aff1340038559c438b61bb30dd Mon Sep 17 00:00:00 2001
From: Josh de Kock <josh@itanimul.li>
Date: Sun, 21 Jan 2018 16:06:54 +0000
Subject: lavf: add new API for iterating muxers and demuxers

---
 libavformat/format.c | 68 +++++-----------------------------------------------
 1 file changed, 6 insertions(+), 62 deletions(-)

(limited to 'libavformat/format.c')

diff --git a/libavformat/format.c b/libavformat/format.c
index 759b5b1ab4..608af1b692 100644
--- a/libavformat/format.c
+++ b/libavformat/format.c
@@ -34,65 +34,6 @@
  * @file
  * Format register and lookup
  */
-/** head of registered input format linked list */
-static AVInputFormat *first_iformat = NULL;
-/** head of registered output format linked list */
-static AVOutputFormat *first_oformat = NULL;
-
-static AVInputFormat **last_iformat = &first_iformat;
-static AVOutputFormat **last_oformat = &first_oformat;
-
-AVInputFormat *av_iformat_next(const AVInputFormat *f)
-{
-    if (f)
-        return f->next;
-    else
-        return first_iformat;
-}
-
-AVOutputFormat *av_oformat_next(const AVOutputFormat *f)
-{
-    if (f)
-        return f->next;
-    else
-        return first_oformat;
-}
-
-static AVMutex iformat_register_mutex = AV_MUTEX_INITIALIZER;
-
-void av_register_input_format(AVInputFormat *format)
-{
-    AVInputFormat **p;
-
-    ff_mutex_lock(&iformat_register_mutex);
-    p = last_iformat;
-
-    while (*p)
-        p = &(*p)->next;
-    *p = format;
-    format->next = NULL;
-    last_iformat = &format->next;
-
-    ff_mutex_unlock(&iformat_register_mutex);
-}
-
-static AVMutex oformat_register_mutex = AV_MUTEX_INITIALIZER;
-
-void av_register_output_format(AVOutputFormat *format)
-{
-    AVOutputFormat **p;
-
-    ff_mutex_lock(&oformat_register_mutex);
-    p = last_oformat;
-
-    while (*p)
-        p = &(*p)->next;
-    *p = format;
-    format->next = NULL;
-    last_oformat = &format->next;
-
-    ff_mutex_unlock(&oformat_register_mutex);
-}
 
 int av_match_ext(const char *filename, const char *extensions)
 {
@@ -111,6 +52,7 @@ AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
                                 const char *mime_type)
 {
     AVOutputFormat *fmt = NULL, *fmt_found;
+    void *i = 0;
     int score_max, score;
 
     /* specific test for image sequences */
@@ -124,7 +66,7 @@ AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
     /* Find the proper file type. */
     fmt_found = NULL;
     score_max = 0;
-    while ((fmt = av_oformat_next(fmt))) {
+    while ((fmt = av_muxer_iterate(&i))) {
         score = 0;
         if (fmt->name && short_name && av_match_name(short_name, fmt->name))
             score += 100;
@@ -176,7 +118,8 @@ enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
 AVInputFormat *av_find_input_format(const char *short_name)
 {
     AVInputFormat *fmt = NULL;
-    while ((fmt = av_iformat_next(fmt)))
+    void *i = 0;
+    while ((fmt = av_demuxer_iterate(&i)))
         if (av_match_name(short_name, fmt->name))
             return fmt;
     return NULL;
@@ -188,6 +131,7 @@ AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened,
     AVProbeData lpd = *pd;
     AVInputFormat *fmt1 = NULL, *fmt;
     int score, score_max = 0;
+    void *i = 0;
     const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
     enum nodat {
         NO_ID3,
@@ -213,7 +157,7 @@ AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened,
     }
 
     fmt = NULL;
-    while ((fmt1 = av_iformat_next(fmt1))) {
+    while ((fmt1 = av_demuxer_iterate(&i))) {
         if (!is_opened == !(fmt1->flags & AVFMT_NOFILE) && strcmp(fmt1->name, "image2"))
             continue;
         score = 0;
-- 
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