[vlc-devel] commit: Make shine really not re-entrant ( Rémi Denis-Courmont )
git version control
git at videolan.org
Wed Jan 6 21:29:36 CET 2010
vlc | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Wed Jan 6 22:25:58 2010 +0200| [70cf81097a5f5e429cbe2b5a1e5a325fb21b58c7] | committer: Rémi Denis-Courmont
Make shine really not re-entrant
> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=70cf81097a5f5e429cbe2b5a1e5a325fb21b58c7
---
modules/codec/shine/shine_mod.c | 34 ++++++++++++++++++++++++++++++----
1 files changed, 30 insertions(+), 4 deletions(-)
diff --git a/modules/codec/shine/shine_mod.c b/modules/codec/shine/shine_mod.c
index 6f30a45..37e2e98 100644
--- a/modules/codec/shine/shine_mod.c
+++ b/modules/codec/shine/shine_mod.c
@@ -40,8 +40,8 @@
/* shine.c uses a lot of static variables, so we include the C file to keep
* the scope.
- * Note that it makes this decoder non reentrant, this is why we set
- * b_reentrant to VLC_FALSE in the module initialisation */
+ * Note that it makes this decoder non reentrant, this is why we have the
+ * struct entrant below */
#include "shine.c"
struct encoder_sys_t
@@ -68,6 +68,12 @@ vlc_module_begin();
set_callbacks( OpenEncoder, CloseEncoder );
vlc_module_end();
+static struct
+{
+ bool busy;
+ vlc_mutex_t lock;
+} entrant = { false, VLC_STATIC_MUTEX, };
+
static int OpenEncoder( vlc_object_t *p_this )
{
encoder_t *p_enc = (encoder_t*)p_this;
@@ -96,14 +102,24 @@ static int OpenEncoder( vlc_object_t *p_this )
p_enc->fmt_out.i_bitrate, p_enc->fmt_out.audio.i_rate,
p_enc->fmt_out.audio.i_channels );
+ vlc_mutex_lock( &entrant.lock );
+ if( entrant.busy )
+ {
+ msg_Err( p_enc, "encoder already in progress" );
+ vlc_mutex_unlock( &entrant.lock );
+ return VLC_EGENERIC;
+ }
+ entrant.busy = true;
+ vlc_mutex_unlock( &entrant.lock );
+
p_enc->p_sys = p_sys = calloc( 1, sizeof( *p_sys ) );
if( !p_sys )
- return VLC_ENOMEM;
+ goto enomem;
if( !( p_sys->p_fifo = block_FifoNew() ) )
{
free( p_sys );
- return VLC_ENOMEM;
+ goto enomem;
}
init_mp3_encoder_engine( p_enc->fmt_out.audio.i_rate,
@@ -113,6 +129,12 @@ static int OpenEncoder( vlc_object_t *p_this )
p_enc->fmt_out.i_cat = AUDIO_ES;
return VLC_SUCCESS;
+
+enomem:
+ vlc_mutex_lock( &entrant.lock );
+ entrant.busy = false;
+ vlc_mutex_unlock( &entrant.lock );
+ return VLC_ENOMEM;
}
/* We split/pack PCM blocks to a fixed size: pcm_chunk_size bytes */
@@ -229,6 +251,10 @@ static void CloseEncoder( vlc_object_t *p_this )
{
encoder_sys_t *p_sys = ((encoder_t*)p_this)->p_sys;
+ vlc_mutex_lock( &entrant.lock );
+ entrant.busy = false;
+ vlc_mutex_unlock( &entrant.lock );
+
/* TODO: we should send the last PCM block padded with 0
* But we don't know if other blocks will come before it's too late */
if( p_sys->i_buffer )
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