From fc43fc9faa6edc3c8df76cfa51510a98958563e6 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Fri, 28 Oct 2011 10:07:41 -0400
Subject: [PATCH] gsmdec: add flush function to reset the decoder state when
 seeking

---
 libavcodec/gsmdec.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libavcodec/gsmdec.c b/libavcodec/gsmdec.c
index 26340c2792..77c22e5d79 100644
--- a/libavcodec/gsmdec.c
+++ b/libavcodec/gsmdec.c
@@ -87,6 +87,12 @@ static int gsm_decode_frame(AVCodecContext *avctx, void *data,
     return avctx->block_align;
 }
 
+static void gsm_flush(AVCodecContext *avctx)
+{
+    GSMContext *s = avctx->priv_data;
+    memset(s, 0, sizeof(*s));
+}
+
 AVCodec ff_gsm_decoder = {
     .name           = "gsm",
     .type           = AVMEDIA_TYPE_AUDIO,
@@ -94,6 +100,7 @@ AVCodec ff_gsm_decoder = {
     .priv_data_size = sizeof(GSMContext),
     .init           = gsm_init,
     .decode         = gsm_decode_frame,
+    .flush          = gsm_flush,
     .long_name = NULL_IF_CONFIG_SMALL("GSM"),
 };
 
@@ -104,5 +111,6 @@ AVCodec ff_gsm_ms_decoder = {
     .priv_data_size = sizeof(GSMContext),
     .init           = gsm_init,
     .decode         = gsm_decode_frame,
+    .flush          = gsm_flush,
     .long_name = NULL_IF_CONFIG_SMALL("GSM Microsoft variant"),
 };