lavc/vp56: Move golden_frame into VP56Context

Makes golden_frame more like other frame data, paves way for threading
alpha channel decode.
Signed-off-by: Ben Jackson <ben@ben.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/vp5.c

@@ -35,8 +35,7 @@
 #include "vp5data.h"
 
 
-static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
-                            int *golden_frame)
+static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size)
 {
     VP56RangeCoder *c = &s->c;
     int rows, cols;

libavcodec/vp56.c

@@ -507,12 +507,11 @@ int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) {
         int mb_row, mb_col, mb_row_flip, mb_offset = 0;
         int block, y, uv, stride_y, stride_uv;
-        int golden_frame = 0;
         int res;
 
         s->modelp = &s->models[is_alpha];
 
-        res = s->parse_header(s, buf, remaining_buf_size, &golden_frame);
+        res = s->parse_header(s, buf, remaining_buf_size);
         if (!res)
             return -1;
 
@@ -620,7 +619,7 @@ int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
         }
 
     next:
-        if (p->key_frame || golden_frame) {
+        if (p->key_frame || s->golden_frame) {
             if (s->framep[VP56_FRAME_GOLDEN]->data[0] && s->framep[VP56_FRAME_GOLDEN] != p &&
                 s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2])
                 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
@@ -690,6 +689,7 @@ av_cold void ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
     s->macroblocks = NULL;
     s->quantizer = -1;
     s->deblock_filtering = 1;
+    s->golden_frame = 0;
 
     s->filter = NULL;
 

libavcodec/vp56.h

@@ -50,7 +50,7 @@ typedef void (*VP56DefaultModelsInit)(VP56Context *s);
 typedef void (*VP56ParseVectorModels)(VP56Context *s);
 typedef int  (*VP56ParseCoeffModels)(VP56Context *s);
 typedef int  (*VP56ParseHeader)(VP56Context *s, const uint8_t *buf,
-                                int buf_size, int *golden_frame);
+                                int buf_size);
 
 typedef struct {
     int high;
@@ -105,6 +105,7 @@ struct vp56_context {
     int sub_version;
 
     /* frame info */
+    int golden_frame;
     int plane_width[4];
     int plane_height[4];
     int mb_width;   /* number of horizontal MB */

libavcodec/vp6.c

@@ -43,8 +43,7 @@
 static void vp6_parse_coeff(VP56Context *s);
 static void vp6_parse_coeff_huffman(VP56Context *s);
 
-static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
-                            int *golden_frame)
+static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size)
 {
     VP56RangeCoder *c = &s->c;
     int parse_filter_info = 0;
@@ -100,6 +99,7 @@ static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
         if (sub_version < 8)
             vrt_shift = 5;
         s->sub_version = sub_version;
+        s->golden_frame = 0;
     } else {
         if (!s->sub_version || !s->avctx->coded_width || !s->avctx->coded_height)
             return 0;
@@ -111,7 +111,7 @@ static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
         }
         ff_vp56_init_range_decoder(c, buf+1, buf_size-1);
 
-        *golden_frame = vp56_rac_get(c);
+        s->golden_frame = vp56_rac_get(c);
         if (s->filter_header) {
             s->deblock_filtering = vp56_rac_get(c);
             if (s->deblock_filtering)