From 12bd3c1f99f11ea21b32e5720908f258d0c5097a Mon Sep 17 00:00:00 2001
From: Jai Menon <jmenon86@gmail.com>
Date: Mon, 24 May 2010 14:19:44 +0000
Subject: [PATCH] FFplay : Implement custom reget_buffer for the input filter.

Originally committed as revision 23287 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 ffplay.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/ffplay.c b/ffplay.c
index 2e2149e9a2..86040bec3f 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -1609,6 +1609,25 @@ static void input_release_buffer(AVCodecContext *codec, AVFrame *pic)
     avfilter_unref_pic(pic->opaque);
 }
 
+static int input_reget_buffer(AVCodecContext *codec, AVFrame *pic)
+{
+    AVFilterPicRef *ref = pic->opaque;
+
+    if (pic->data[0] == NULL) {
+        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
+        return codec->get_buffer(codec, pic);
+    }
+
+    if ((codec->width != ref->w) || (codec->height != ref->h) ||
+        (codec->pix_fmt != ref->pic->format)) {
+        av_log(codec, AV_LOG_ERROR, "Picture properties changed.\n");
+        return -1;
+    }
+
+    pic->reordered_opaque = codec->reordered_opaque;
+    return 0;
+}
+
 static int input_init(AVFilterContext *ctx, const char *args, void *opaque)
 {
     FilterPriv *priv = ctx->priv;
@@ -1622,6 +1641,7 @@ static int input_init(AVFilterContext *ctx, const char *args, void *opaque)
         priv->use_dr1 = 1;
         codec->get_buffer     = input_get_buffer;
         codec->release_buffer = input_release_buffer;
+        codec->reget_buffer   = input_reget_buffer;
     }
 
     priv->frame = avcodec_alloc_frame();