support reusing mb types and field select values of the source file, but use...

support reusing mb types and field select values of the source file, but use motion vectors just as additional predictors
minor cleanup
segfault fix

Originally committed as revision 3060 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -161,6 +161,7 @@ static int sc_threshold = 0;
 static int debug = 0;
 static int debug_mv = 0;
 static int me_threshold = 0;
+static int mb_threshold = 0;
 extern int loop_input; /* currently a hack */
 
 static int gop_size = 12;
@@ -1866,6 +1867,10 @@ static void opt_me_threshold(const char *arg)
     me_threshold = atoi(arg);
 }
 
+static void opt_mb_threshold(const char *arg)
+{
+    mb_threshold = atoi(arg);
+}
 
 static void opt_error_resilience(const char *arg)
 {
@@ -2873,6 +2878,7 @@ static void opt_output_file(const char *filename)
                 video_enc->dct_algo = dct_algo;
                 video_enc->idct_algo = idct_algo;
                 video_enc->me_threshold= me_threshold;
+                video_enc->mb_threshold= mb_threshold;
                 video_enc->strict_std_compliance = strict;
                 video_enc->error_rate = error_rate;
                 video_enc->noise_reduction= noise_reduction;
@@ -3494,6 +3500,7 @@ const OptionDef options[] = {
     { "dct_algo", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_dct_algo}, "set dct algo",  "algo" },
     { "idct_algo", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_idct_algo}, "set idct algo",  "algo" },
     { "me_threshold", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_me_threshold}, "motion estimaton threshold",  "" },
+    { "mb_threshold", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_mb_threshold}, "macroblock threshold",  "" },
     { "er", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_error_resilience}, "set error resilience",  "n" },
     { "ec", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_error_concealment}, "set error concealment",  "bit_mask" },
     { "bf", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_b_frames}, "use 'frames' B frames", "frames" },

libavcodec/avcodec.h

@@ -17,7 +17,7 @@ extern "C" {
 
 #define FFMPEG_VERSION_INT     0x000408
 #define FFMPEG_VERSION         "0.4.8"
-#define LIBAVCODEC_BUILD       4709
+#define LIBAVCODEC_BUILD       4710
 
 #define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
 #define LIBAVCODEC_VERSION     FFMPEG_VERSION
@@ -1570,12 +1570,20 @@ typedef struct AVCodecContext {
     void *thread_opaque;
 
     /**
-     * Motion estimation threshold.
+     * Motion estimation threshold. under which no motion estimation is 
+     * performed, but instead the user specified motion vectors are used
      * 
      * - encoding: set by user
-     * - decoding: set by user
+     * - decoding: unused
      */
      int me_threshold;
+
+    /**
+     * Macroblock threshold. under which the user specified macroblock types will be used
+     * - encoding: set by user
+     * - decoding: unused
+     */
+     int mb_threshold;
 } AVCodecContext;
 
 

libavcodec/mpegvideo.h

@@ -229,7 +229,6 @@ typedef struct MotionEstContext{
 /*    cmp, chroma_cmp;*/
     op_pixels_func (*hpel_put)[4];
     op_pixels_func (*hpel_avg)[4];
-    op_pixels_func (*chroma_hpel_put)[4];
     qpel_mc_func (*qpel_put)[16];
     qpel_mc_func (*qpel_avg)[16];
     uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV