replace some #ifdef CONFIG_* by if(ENABLE_*)

Originally committed as revision 9013 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpegvideo.c

@@ -1210,8 +1210,8 @@ int MPV_encode_init(AVCodecContext *avctx)
         avctx->delay=0;
         s->low_delay=1;
         break;
-#ifdef CONFIG_H261_ENCODER
     case CODEC_ID_H261:
+        if (!ENABLE_H261_ENCODER)  return -1;
         if (ff_h261_get_picture_format(s->width, s->height) < 0) {
             av_log(avctx, AV_LOG_ERROR, "The specified picture size of %dx%d is not valid for the H.261 codec.\nValid sizes are 176x144, 352x288\n", s->width, s->height);
             return -1;
@@ -1220,7 +1220,6 @@ int MPV_encode_init(AVCodecContext *avctx)
         avctx->delay=0;
         s->low_delay=1;
         break;
-#endif
     case CODEC_ID_H263:
         if (h263_get_picture_format(s->width, s->height) == 7) {
             av_log(avctx, AV_LOG_INFO, "The specified picture size of %dx%d is not valid for the H.263 codec.\nValid sizes are 128x96, 176x144, 352x288, 704x576, and 1408x1152. Try H.263+.\n", s->width, s->height);
@@ -1348,10 +1347,8 @@ int MPV_encode_init(AVCodecContext *avctx)
     ff_set_cmp(&s->dsp, s->dsp.ildct_cmp, s->avctx->ildct_cmp);
     ff_set_cmp(&s->dsp, s->dsp.frame_skip_cmp, s->avctx->frame_skip_cmp);
 
-#ifdef CONFIG_H261_ENCODER
-    if (s->out_format == FMT_H261)
+    if (ENABLE_H261_ENCODER && s->out_format == FMT_H261)
         ff_h261_encode_init(s);
-#endif
     if (s->out_format == FMT_H263)
         h263_encode_init(s);
     if (ENABLE_MSMPEG4_ENCODER && s->msmpeg4_version)
@@ -3057,11 +3054,9 @@ if(s->quarter_sample)
         pix_op[s->chroma_x_shift][uvdxy](dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);
         pix_op[s->chroma_x_shift][uvdxy](dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift);
     }
-#if defined(CONFIG_H261_ENCODER) || defined(CONFIG_H261_DECODER)
-    if(s->out_format == FMT_H261){
+    if((ENABLE_H261_ENCODER || ENABLE_H261_DECODER) && s->out_format == FMT_H261){
         ff_h261_loop_filter(s);
     }
-#endif
 }
 
 /* apply one mpeg motion vector to the three components */
@@ -4588,10 +4583,9 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s, int motion_x,
         if (ENABLE_WMV2_ENCODER)
             ff_wmv2_encode_mb(s, s->block, motion_x, motion_y);
         break;
-#ifdef CONFIG_H261_ENCODER
     case CODEC_ID_H261:
+        if (ENABLE_H261_ENCODER)
         ff_h261_encode_mb(s, s->block, motion_x, motion_y); break;
-#endif
     case CODEC_ID_H263:
     case CODEC_ID_H263P:
     case CODEC_ID_FLV1:
@@ -5000,13 +4994,11 @@ static int encode_thread(AVCodecContext *c, void *arg){
             s->mb_y = mb_y;  // moved into loop, can get changed by H.261
             ff_update_block_index(s);
 
-#ifdef CONFIG_H261_ENCODER
-            if(s->codec_id == CODEC_ID_H261){
+            if(ENABLE_H261_ENCODER && s->codec_id == CODEC_ID_H261){
                 ff_h261_reorder_mb_index(s);
                 xy= s->mb_y*s->mb_stride + s->mb_x;
                 mb_type= s->mb_type[xy];
             }
-#endif
 
             /* write gob / video packet header  */
             if(s->rtp_mode){
@@ -5773,11 +5765,10 @@ static int encode_picture(MpegEncContext *s, int picture_number)
         if (ENABLE_MJPEG_ENCODER)
             mjpeg_picture_header(s);
         break;
-#ifdef CONFIG_H261_ENCODER
     case FMT_H261:
+        if (ENABLE_H261_ENCODER)
         ff_h261_encode_picture_header(s, picture_number);
         break;
-#endif
     case FMT_H263:
         if (ENABLE_WMV2_ENCODER && s->codec_id == CODEC_ID_WMV2)
             ff_wmv2_encode_picture_header(s, picture_number);
@@ -5785,14 +5776,10 @@ static int encode_picture(MpegEncContext *s, int picture_number)
             msmpeg4_encode_picture_header(s, picture_number);
         else if (s->h263_pred)
             mpeg4_encode_picture_header(s, picture_number);
-#ifdef CONFIG_RV10_ENCODER
-        else if (s->codec_id == CODEC_ID_RV10)
+        else if (ENABLE_RV10_ENCODER && s->codec_id == CODEC_ID_RV10)
             rv10_encode_picture_header(s, picture_number);
-#endif
-#ifdef CONFIG_RV20_ENCODER
-        else if (s->codec_id == CODEC_ID_RV20)
+        else if (ENABLE_RV20_ENCODER && s->codec_id == CODEC_ID_RV20)
             rv20_encode_picture_header(s, picture_number);
-#endif
         else if (s->codec_id == CODEC_ID_FLV1)
             ff_flv_encode_picture_header(s, picture_number);
         else