h264: move reading direct_spatial_mv_pred out of ff_set_ref_count()

[ffmpeg] / libavutil / fifo.c

diff --git a/libavutil/fifo.c b/libavutil/fifo.c
index 26a81657d9eaed540433cafe9404b521dbfc2777..a42899c2b302a57046acf55c59023693beaea3d6 100644 (file)
--- a/libavutil/fifo.c
+++ b/libavutil/fifo.c
@@ -3,20 +3,20 @@
  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  * Copyright (c) 2006 Roman Shaposhnik
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "common.h"
@@ -24,12 +24,12 @@
 
 AVFifoBuffer *av_fifo_alloc(unsigned int size)
 {
-    AVFifoBuffer *f= av_mallocz(sizeof(AVFifoBuffer));
-    if(!f)
+    AVFifoBuffer *f = av_mallocz(sizeof(AVFifoBuffer));
+    if (!f)
         return NULL;
-    f->wptr = f->rptr =
     f->buffer = av_malloc(size);
-    f->end = f->buffer + size;
+    f->end    = f->buffer + size;
+    av_fifo_reset(f);
     if (!f->buffer)
         av_freep(&f);
     return f;
@@ -37,81 +37,84 @@ AVFifoBuffer *av_fifo_alloc(unsigned int size)
 
 void av_fifo_free(AVFifoBuffer *f)
 {
-    if(f){
-    av_free(f->buffer);
-    av_free(f);
+    if (f) {
+        av_free(f->buffer);
+        av_free(f);
     }
 }
 
+void av_fifo_reset(AVFifoBuffer *f)
+{
+    f->wptr = f->rptr = f->buffer;
+    f->wndx = f->rndx = 0;
+}
+
 int av_fifo_size(AVFifoBuffer *f)
 {
     return (uint32_t)(f->wndx - f->rndx);
 }
 
-#if LIBAVUTIL_VERSION_MAJOR < 50
-void av_fifo_realloc(AVFifoBuffer *f, unsigned int new_size) {
-    av_fifo_realloc2(f, new_size);
+int av_fifo_space(AVFifoBuffer *f)
+{
+    return f->end - f->buffer - av_fifo_size(f);
 }
-#endif
 
-int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size) {
-    unsigned int old_size= f->end - f->buffer;
+int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size)
+{
+    unsigned int old_size = f->end - f->buffer;
 
-    if(old_size < new_size){
-        int len= av_fifo_size(f);
-        AVFifoBuffer *f2= av_fifo_alloc(new_size);
+    if (old_size < new_size) {
+        int len          = av_fifo_size(f);
+        AVFifoBuffer *f2 = av_fifo_alloc(new_size);
 
         if (!f2)
             return -1;
-        av_fifo_generic_read(f, len, NULL, f2->buffer);
+        av_fifo_generic_read(f, f2->buffer, len, NULL);
         f2->wptr += len;
         f2->wndx += len;
         av_free(f->buffer);
-        *f= *f2;
+        *f = *f2;
         av_free(f2);
     }
     return 0;
 }
 
-#if LIBAVUTIL_VERSION_MAJOR < 50
-void av_fifo_write(AVFifoBuffer *f, const uint8_t *buf, int size)
-{
-    av_fifo_generic_write(f, (void *)buf, size, NULL);
-}
-#endif
-
-int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int (*func)(void*, void*, int))
+/* src must NOT be const as it can be a context for func that may need
+ * updating (like a pointer or byte counter) */
+int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size,
+                          int (*func)(void *, void *, int))
 {
     int total = size;
     do {
         int len = FFMIN(f->end - f->wptr, size);
-        if(func) {
-            if(func(src, f->wptr, len) <= 0)
+        if (func) {
+            if (func(src, f->wptr, len) <= 0)
                 break;
         } else {
             memcpy(f->wptr, src, len);
-            src = (uint8_t*)src + len;
+            src = (uint8_t *)src + len;
         }
 // Write memory barrier needed for SMP here in theory
         f->wptr += len;
         if (f->wptr >= f->end)
             f->wptr = f->buffer;
         f->wndx += len;
-        size -= len;
+        size    -= len;
     } while (size > 0);
     return total - size;
 }
 
-
-int av_fifo_generic_read(AVFifoBuffer *f, int buf_size, void (*func)(void*, void*, int), void* dest)
+int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size,
+                         void (*func)(void *, void *, int))
 {
 // Read memory barrier needed for SMP here in theory
     do {
         int len = FFMIN(f->end - f->rptr, buf_size);
-        if(func) func(dest, f->rptr, len);
-        else{
+        if (func)
+            func(dest, f->rptr, len);
+        else {
             memcpy(dest, f->rptr, len);
-            dest = (uint8_t*)dest + len;
+            dest = (uint8_t *)dest + len;
         }
 // memory barrier needed for SMP here in theory
         av_fifo_drain(f, len);