[SCM] libav/experimental: Add init and uninit functions to cmdutils, reduces code duplication between ffmpeg and ffplay and avoids a valgrind error by freeing avformat_opts->key.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit a5c33faaccec6787419fe373a9e7ae0932b15ee1
Author: Reimar Döffinger <Reimar.Doeffinger at gmx.de>
Date:   Sat Oct 2 08:44:33 2010 +0000

    Add init and uninit functions to cmdutils, reduces code duplication
    between ffmpeg and ffplay and avoids a valgrind error by freeing
    avformat_opts->key.
    
    Originally committed as revision 25309 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/cmdutils.c b/cmdutils.c
index ff39929..313b37d 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -57,6 +57,25 @@ struct SwsContext *sws_opts;
 
 const int this_year = 2010;
 
+void init_opts(void)
+{
+    int i;
+    for (i = 0; i < AVMEDIA_TYPE_NB; i++)
+        avcodec_opts[i] = avcodec_alloc_context2(i);
+    avformat_opts = avformat_alloc_context();
+    sws_opts = sws_getContext(16, 16, 0, 16, 16, 0, SWS_BICUBIC, NULL, NULL, NULL);
+}
+
+void uninit_opts(void)
+{
+    int i;
+    for (i = 0; i < AVMEDIA_TYPE_NB; i++)
+        av_freep(&avcodec_opts[i]);
+    av_freep(&avformat_opts->key);
+    av_freep(&avformat_opts);
+    av_freep(&sws_opts);
+}
+
 void log_callback_help(void* ptr, int level, const char* fmt, va_list vl)
 {
     vfprintf(stdout, fmt, vl);
diff --git a/cmdutils.h b/cmdutils.h
index e753c43..4ce62b6 100644
--- a/cmdutils.h
+++ b/cmdutils.h
@@ -45,6 +45,17 @@ extern AVFormatContext *avformat_opts;
 extern struct SwsContext *sws_opts;
 
 /**
+ * Initialize the cmdutils option system, in particular
+ * allocate the *_opts contexts.
+ */
+void init_opts(void);
+/**
+ * Uninitialize the cmdutils option system, in particular
+ * free the *_opts contexts and their contents.
+ */
+void uninit_opts(void);
+
+/**
  * Trivial log callback.
  * Only suitable for show_help and similar since it lacks prefix handling.
  */
diff --git a/ffmpeg.c b/ffmpeg.c
index 9b99786..52028ba 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -636,10 +636,7 @@ static int ffmpeg_exit(int ret)
 
     av_free(video_standard);
 
-    for (i=0;i<AVMEDIA_TYPE_NB;i++)
-        av_free(avcodec_opts[i]);
-    av_free(avformat_opts);
-    av_free(sws_opts);
+    uninit_opts();
     av_free(audio_buf);
     av_free(audio_out);
     allocated_audio_buf_size= allocated_audio_out_size= 0;
@@ -4336,7 +4333,6 @@ static const OptionDef options[] = {
 
 int main(int argc, char **argv)
 {
-    int i;
     int64_t ti;
 
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
@@ -4355,11 +4351,7 @@ int main(int argc, char **argv)
         url_set_interrupt_cb(decode_interrupt_cb);
 #endif
 
-    for(i=0; i<AVMEDIA_TYPE_NB; i++){
-        avcodec_opts[i]= avcodec_alloc_context2(i);
-    }
-    avformat_opts = avformat_alloc_context();
-    sws_opts = sws_getContext(16,16,0, 16,16,0, sws_flags, NULL,NULL,NULL);
+    init_opts();
 
     show_banner();
 
diff --git a/ffplay.c b/ffplay.c
index 2e61268..df15f48 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -1326,15 +1326,11 @@ static void stream_close(VideoState *is)
 
 static void do_exit(void)
 {
-    int i;
     if (cur_stream) {
         stream_close(cur_stream);
         cur_stream = NULL;
     }
-    for (i = 0; i < AVMEDIA_TYPE_NB; i++)
-        av_free(avcodec_opts[i]);
-    av_free(avformat_opts);
-    av_free(sws_opts);
+    uninit_opts();
 #if CONFIG_AVFILTER
     avfilter_uninit();
 #endif
@@ -3140,7 +3136,7 @@ static void opt_input_file(const char *filename)
 /* Called from the main */
 int main(int argc, char **argv)
 {
-    int flags, i;
+    int flags;
 
     av_log_set_flags(AV_LOG_SKIP_REPEATED);
 
@@ -3154,13 +3150,7 @@ int main(int argc, char **argv)
 #endif
     av_register_all();
 
-    for(i=0; i<AVMEDIA_TYPE_NB; i++){
-        avcodec_opts[i]= avcodec_alloc_context2(i);
-    }
-    avformat_opts = avformat_alloc_context();
-#if !CONFIG_AVFILTER
-    sws_opts = sws_getContext(16,16,0, 16,16,0, sws_flags, NULL,NULL,NULL);
-#endif
+    init_opts();
 
     show_banner();
 

-- 
Libav/FFmpeg packaging