optimize imdct_half:

[ffmpeg] / libavcodec / kmvc.c

diff --git a/libavcodec/kmvc.c b/libavcodec/kmvc.c
index 9623173fc1d53823520f500fd915820ced3dd6cc..3ab4adf176ef9f04c5f954e9f053ed819673733e 100644 (file)
--- a/libavcodec/kmvc.c
+++ b/libavcodec/kmvc.c
@@ -2,20 +2,21 @@
  * KMVC decoder
  * Copyright (c) 2006 Konstantin Shishkov
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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 this library; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
  */
 
 /**
@@ -26,8 +27,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#include "common.h"
 #include "avcodec.h"
+#include "bytestream.h"
 
 #define KMVC_KEYFRAME 0x80
 #define KMVC_PALETTE  0x40
@@ -66,7 +67,7 @@ typedef struct BitBuf {
     } \
 }
 
-static void kmvc_decode_intra_8x8(KmvcContext * ctx, uint8_t * src, int w, int h)
+static void kmvc_decode_intra_8x8(KmvcContext * ctx, const uint8_t * src, int w, int h)
 {
     BitBuf bb;
     int res, val;
@@ -141,7 +142,7 @@ static void kmvc_decode_intra_8x8(KmvcContext * ctx, uint8_t * src, int w, int h
         }
 }
 
-static void kmvc_decode_inter_8x8(KmvcContext * ctx, uint8_t * src, int w, int h)
+static void kmvc_decode_inter_8x8(KmvcContext * ctx, const uint8_t * src, int w, int h)
 {
     BitBuf bb;
     int res, val;
@@ -223,10 +224,10 @@ static void kmvc_decode_inter_8x8(KmvcContext * ctx, uint8_t * src, int w, int h
         }
 }
 
-static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint8_t * buf,
+static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, const uint8_t * buf,
                         int buf_size)
 {
-    KmvcContext *const ctx = (KmvcContext *) avctx->priv_data;
+    KmvcContext *const ctx = avctx->priv_data;
     uint8_t *out, *src;
     int i;
     int header;
@@ -248,7 +249,7 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint
     if (buf[0] == 127) {
         buf += 3;
         for (i = 0; i < 127; i++) {
-            ctx->pal[i + (header & 0x81)] = (buf[0] << 16) | (buf[1] << 8) | buf[2];
+            ctx->pal[i + (header & 0x81)] = AV_RB24(buf);
             buf += 4;
         }
         buf -= 127 * 4 + 3;
@@ -273,8 +274,7 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint
         ctx->pic.palette_has_changed = 1;
         // palette starts from index 1 and has 127 entries
         for (i = 1; i <= ctx->palsize; i++) {
-            ctx->pal[i] = (buf[0] << 16) | (buf[1] << 8) | buf[2];
-            buf += 3;
+            ctx->pal[i] = bytestream_get_be24(&buf);
         }
     }
 
@@ -338,13 +338,12 @@ static int decode_frame(AVCodecContext * avctx, void *data, int *data_size, uint
 /*
  * Init kmvc decoder
  */
-static int decode_init(AVCodecContext * avctx)
+static av_cold int decode_init(AVCodecContext * avctx)
 {
-    KmvcContext *const c = (KmvcContext *) avctx->priv_data;
+    KmvcContext *const c = avctx->priv_data;
     int i;
 
     c->avctx = avctx;
-    avctx->has_b_frames = 0;
 
     c->pic.data[0] = NULL;
 
@@ -366,13 +365,13 @@ static int decode_init(AVCodecContext * avctx)
         av_log(NULL, 0, "Extradata missing, decoding may not work properly...\n");
         c->palsize = 127;
     } else {
-        c->palsize = LE_16(avctx->extradata + 10);
+        c->palsize = AV_RL16(avctx->extradata + 10);
     }
 
     if (avctx->extradata_size == 1036) {        // palette in extradata
         uint8_t *src = avctx->extradata + 12;
         for (i = 0; i < 256; i++) {
-            c->pal[i] = LE_32(src);
+            c->pal[i] = AV_RL32(src);
             src += 4;
         }
         c->setpal = 1;
@@ -391,9 +390,9 @@ static int decode_init(AVCodecContext * avctx)
 /*
  * Uninit kmvc decoder
  */
-static int decode_end(AVCodecContext * avctx)
+static av_cold int decode_end(AVCodecContext * avctx)
 {
-    KmvcContext *const c = (KmvcContext *) avctx->priv_data;
+    KmvcContext *const c = avctx->priv_data;
 
     av_freep(&c->frm0);
     av_freep(&c->frm1);
@@ -411,5 +410,6 @@ AVCodec kmvc_decoder = {
     decode_init,
     NULL,
     decode_end,
-    decode_frame
+    decode_frame,
+    .long_name = NULL_IF_CONFIG_SMALL("Karl Morton's video codec"),
 };