dc_val should be signed

Originally committed as revision 6364 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/error_resilience.c

@@ -70,7 +70,7 @@ static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t
     }
 }
 
-static void filter181(uint16_t *data, int width, int height, int stride){
+static void filter181(int16_t *data, int width, int height, int stride){
     int x,y;
 
     /* horizontal filter */
@@ -111,7 +111,7 @@ static void filter181(uint16_t *data, int width, int height, int stride){
  * @param w     width in 8 pixel blocks
  * @param h     height in 8 pixel blocks
  */
-static void guess_dc(MpegEncContext *s, uint16_t *dc, int w, int h, int stride, int is_luma){
+static void guess_dc(MpegEncContext *s, int16_t *dc, int w, int h, int stride, int is_luma){
     int b_x, b_y;
 
     for(b_y=0; b_y<h; b_y++){
@@ -931,7 +931,7 @@ void ff_er_frame_end(MpegEncContext *s){
     for(mb_y=0; mb_y<s->mb_height; mb_y++){
         for(mb_x=0; mb_x<s->mb_width; mb_x++){
             int dc, dcu, dcv, y, n;
-            uint16_t *dc_ptr;
+            int16_t *dc_ptr;
             uint8_t *dest_y, *dest_cb, *dest_cr;
             const int mb_xy= mb_x + mb_y * s->mb_stride;
             const int mb_type= s->current_picture.mb_type[mb_xy];

libavcodec/h263.c

@@ -72,7 +72,7 @@ static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr);
 static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
                               int n, int coded, int intra, int rvlc);
 #ifdef CONFIG_ENCODERS
-static int h263_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr);
+static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);
 static void mpeg4_encode_visual_object_header(MpegEncContext * s);
 static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number);
 #endif //CONFIG_ENCODERS
@@ -1231,7 +1231,7 @@ void h263_encode_mb(MpegEncContext * s,
     int cbpc, cbpy, i, cbp, pred_x, pred_y;
     int16_t pred_dc;
     int16_t rec_intradc[6];
-    uint16_t *dc_ptr[6];
+    int16_t *dc_ptr[6];
     const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1);
     const int dquant_code[5]= {1,0,9,2,3};
 
@@ -1516,10 +1516,10 @@ void ff_h263_loop_filter(MpegEncContext * s){
 }
 
 #ifdef CONFIG_ENCODERS
-static int h263_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr)
+static int h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr)
 {
     int x, y, wrap, a, c, pred_dc, scale;
-    uint16_t *dc_val;
+    int16_t *dc_val;
 
     /* find prediction */
     if (n < 4) {
@@ -1565,8 +1565,7 @@ static int h263_pred_dc(MpegEncContext * s, int n, uint16_t **dc_val_ptr)
 static void h263_pred_acdc(MpegEncContext * s, DCTELEM *block, int n)
 {
     int x, y, wrap, a, c, pred_dc, scale, i;
-    uint16_t *dc_val;
-    int16_t *ac_val, *ac_val1;
+    int16_t *dc_val, *ac_val, *ac_val1;
 
     /* find prediction */
     if (n < 4) {
@@ -2530,7 +2529,7 @@ void ff_set_qscale(MpegEncContext * s, int qscale)
 static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding)
 {
     int a, b, c, wrap, pred, scale, ret;
-    uint16_t *dc_val;
+    int16_t *dc_val;
 
     /* find prediction */
     if (n < 4) {

libavcodec/mpegvideo.h

@@ -344,8 +344,8 @@ typedef struct MpegEncContext {
     Picture *current_picture_ptr;  ///< pointer to the current picture
     uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
     int last_dc[3];                ///< last DC values for MPEG1
-    uint16_t *dc_val_base;
-    uint16_t *dc_val[3];           ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
+    int16_t *dc_val_base;
+    int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
     int16_t dc_cache[4*5];
     int y_dc_scale, c_dc_scale;
     const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table

libavcodec/msmpeg4.c

@@ -627,10 +627,10 @@ static int get_dc(uint8_t *src, int stride, int scale)
 
 /* dir = 0: left, dir = 1: top prediction */
 static inline int msmpeg4_pred_dc(MpegEncContext * s, int n,
-                             uint16_t **dc_val_ptr, int *dir_ptr)
+                             int16_t **dc_val_ptr, int *dir_ptr)
 {
     int a, b, c, wrap, pred, scale;
-    uint16_t *dc_val;
+    int16_t *dc_val;
 
     /* find prediction */
     if (n < 4) {
@@ -787,7 +787,7 @@ static void msmpeg4_encode_dc(MpegEncContext * s, int level, int n, int *dir_ptr
         /* update predictor */
         *dc_val= level;
     }else{
-        uint16_t *dc_val;
+        int16_t *dc_val;
         pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
 
         /* update predictor */
@@ -1875,7 +1875,7 @@ static int msmpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
         /* update predictor */
         *dc_val= level;
     }else{
-        uint16_t *dc_val;
+        int16_t *dc_val;
         pred = msmpeg4_pred_dc(s, n, &dc_val, dir_ptr);
         level += pred;
 

libavcodec/vc1.c

@@ -2341,10 +2341,10 @@ static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int
  * @param dir_ptr Prediction direction for use in AC prediction
  */
 static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
-                                uint16_t **dc_val_ptr, int *dir_ptr)
+                              int16_t **dc_val_ptr, int *dir_ptr)
 {
     int a, b, c, wrap, pred, scale;
-    uint16_t *dc_val;
+    int16_t *dc_val;
     static const uint16_t dcpred[32] = {
     -1, 1024,  512,  341,  256,  205,  171,  146,  128,
          114,  102,   93,   85,   79,   73,   68,   64,
@@ -2402,10 +2402,10 @@ static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
  */
 static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
                               int a_avail, int c_avail,
-                              uint16_t **dc_val_ptr, int *dir_ptr)
+                              int16_t **dc_val_ptr, int *dir_ptr)
 {
     int a, b, c, wrap, pred, scale;
-    uint16_t *dc_val;
+    int16_t *dc_val;
     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
     int q1, q2 = 0;
 
@@ -2578,7 +2578,7 @@ static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded
     MpegEncContext *s = &v->s;
     int dc_pred_dir = 0; /* Direction of the DC prediction used */
     int run_diff, i;
-    uint16_t *dc_val;
+    int16_t *dc_val;
     int16_t *ac_val, *ac_val2;
     int dcdiff;
 
@@ -2743,7 +2743,7 @@ static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int c
     MpegEncContext *s = &v->s;
     int dc_pred_dir = 0; /* Direction of the DC prediction used */
     int run_diff, i;
-    uint16_t *dc_val;
+    int16_t *dc_val;
     int16_t *ac_val, *ac_val2;
     int dcdiff;
     int a_avail = v->a_avail, c_avail = v->c_avail;
@@ -2940,7 +2940,7 @@ static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int c
     MpegEncContext *s = &v->s;
     int dc_pred_dir = 0; /* Direction of the DC prediction used */
     int run_diff, i;
-    uint16_t *dc_val;
+    int16_t *dc_val;
     int16_t *ac_val, *ac_val2;
     int dcdiff;
     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;