From 101bea5f2272dfcca084aeeb78ccb1c2e925b12b Mon Sep 17 00:00:00 2001
From: Juanjo <pulento@users.sourceforge.net>
Date: Sun, 14 Apr 2002 22:17:40 +0000
Subject: [PATCH] - ME method compatibility with legacy apps. - Please use
 AVCodecContext's me_method now.

Originally committed as revision 399 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 ffmpeg.c               | 12 ++++++------
 libavcodec/avcodec.h   |  5 ++++-
 libavcodec/mpegvideo.c | 18 ++++++++++++------
 3 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/ffmpeg.c b/ffmpeg.c
index 1ae1fa3..52a147b 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -82,7 +82,7 @@ static int video_qmax = 15;
 static int video_qdiff = 3;
 static float video_qblur = 0.5;
 static float video_qcomp = 0.5;
-static int motion_estimation_method = 0;
+static int me_method = 0;
 static int video_disable = 0;
 static int video_codec_id = CODEC_ID_NONE;
 static int same_quality = 0;
@@ -1388,7 +1388,7 @@ void opt_motion_estimation(const char *arg)
             break;
         p++;
     }
-    motion_estimation_method = (p - motion_str) - 4;
+    me_method = (p - motion_str) + 1;
 }
 
 void opt_video_codec(const char *arg)
@@ -1784,7 +1784,7 @@ void opt_output_file(const char *filename)
             else
                 video_enc->get_psnr = 0;
             
-            video_enc->me_method = motion_estimation_method;
+            video_enc->me_method = me_method;
             
             /* XXX: need to find a way to set codec parameters */
             if (oc->format == &ppm_format ||
@@ -2038,11 +2038,11 @@ void show_formats(void)
     pp = motion_str;
     while (*pp) {
         printf(" %s", *pp);
-        if ((pp - motion_str - 4) == ME_ZERO) 
+        if ((pp - motion_str + 1) == ME_ZERO) 
             printf("(fastest)");
-        else if ((pp - motion_str - 4) == ME_FULL) 
+        else if ((pp - motion_str + 1) == ME_FULL) 
             printf("(slowest)");
-        else if ((pp - motion_str - 4) == ME_EPZS) 
+        else if ((pp - motion_str + 1) == ME_EPZS) 
             printf("(default)");
         pp++;
     }
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index a6b03e9..c5209bd 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -58,7 +58,7 @@ enum SampleFormat {
 
 /* motion estimation type, EPZS by default */
 enum Motion_Est_ID {
-    ME_ZERO = -4,
+    ME_ZERO = 1,
     ME_FULL,
     ME_LOG,
     ME_PHODS,
@@ -66,6 +66,9 @@ enum Motion_Est_ID {
     ME_X1
 };
 
+/* only for ME compatiblity with old apps */
+extern int motion_estimation_method;
+
 /* ME algos sorted by quality */
 static const int Motion_Est_QTab[] = { -4, -1, -2, 1, 0, -3 };
 
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 7ae54ad..1f92ffe 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -50,6 +50,7 @@ void (*draw_edges)(UINT8 *buf, int wrap, int width, int height, int w)= draw_edg
 
 //#define DEBUG
 
+
 /* for jpeg fast DCT */
 #define CONST_BITS 14
 
@@ -72,11 +73,11 @@ static UINT8 h263_chroma_roundtab[16] = {
 static UINT16 default_mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
 static UINT8 default_fcode_tab[MAX_MV*2+1];
 
-/* default motion estimation */
-int motion_estimation_method = ME_LOG;
-
 extern UINT8 zigzag_end[64];
 
+/* default motion estimation */
+int motion_estimation_method = ME_EPZS;
+
 static void convert_matrix(int *qmat, UINT16 *qmat16, const UINT16 *quant_matrix, int qscale)
 {
     int i;
@@ -315,7 +316,12 @@ int MPV_encode_init(AVCodecContext *avctx)
     }
     
     /* ME algorithm */
-    s->me_method = avctx->me_method;
+    if (avctx->me_method == 0)
+        /* For compatibility */
+        s->me_method = motion_estimation_method;
+    else
+        s->me_method = avctx->me_method;
+        
     /* Fixed QSCALE */
     s->fixed_qscale = (avctx->flags & CODEC_FLAG_QSCALE);
     
@@ -415,7 +421,7 @@ int MPV_encode_init(AVCodecContext *avctx)
         mpeg1_encode_init(s);
 
     /* dont use mv_penalty table for crap MV as it would be confused */
-    if (s->me_method < 0) s->mv_penalty = default_mv_penalty;
+    if (s->me_method < 5) s->mv_penalty = default_mv_penalty;
 
     s->encoding = 1;
 
@@ -1346,7 +1352,7 @@ static void encode_picture(MpegEncContext *s, int picture_number)
     }
 
     /* find best f_code for ME which do unlimited searches */
-    if(s->pict_type == P_TYPE && s->me_method >= 0){
+    if(s->pict_type == P_TYPE && s->me_method >= 5){
         int mv_num[8];
         int i;
         int loose=0;
-- 
2.7.4