From 5982ae94eef6b0d0ef23f33cc8759c8d6e1ab736 Mon Sep 17 00:00:00 2001
From: Diego Biurrun <diego@biurrun.de>
Date: Fri, 4 May 2007 00:09:33 +0000
Subject: Move VC1 parser to its own file.

Originally committed as revision 8882 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/Makefile     |   1 +
 libavcodec/vc1.c        | 107 +------------------------------------------
 libavcodec/vc1.h        |  36 +++++++++++++++
 libavcodec/vc1_parser.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 156 insertions(+), 106 deletions(-)
 create mode 100644 libavcodec/vc1.h
 create mode 100644 libavcodec/vc1_parser.c

(limited to 'libavcodec')

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 1d160b90dd..719a768689 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -287,6 +287,7 @@ OBJS-$(CONFIG_MPEG4VIDEO_PARSER)       += parser.o
 OBJS-$(CONFIG_MPEGAUDIO_PARSER)        += parser.o
 OBJS-$(CONFIG_MPEGVIDEO_PARSER)        += parser.o
 OBJS-$(CONFIG_PNM_PARSER)              += pnm.o
+OBJS-$(CONFIG_VC1_PARSER)              += vc1_parser.o
 
 OBJS-$(HAVE_PTHREADS)                  += pthread.o
 OBJS-$(HAVE_W32THREADS)                += w32thread.o
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index 090b4f606d..acc6d43966 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -32,6 +32,7 @@
 #include "mpegvideo.h"
 #include "vc1data.h"
 #include "vc1acdata.h"
+#include "vc1.h"
 
 #undef NDEBUG
 #include <assert.h>
@@ -46,19 +47,6 @@ extern const uint16_t ff_msmp4_mb_i_table[64][2];
 #define AC_VLC_BITS 9
 static const uint16_t table_mb_intra[64][2];
 
-/** Markers used if VC-1 AP frame data */
-//@{
-enum VC1Code{
-    VC1_CODE_RES0       = 0x00000100,
-    VC1_CODE_ENDOFSEQ   = 0x0000010A,
-    VC1_CODE_SLICE,
-    VC1_CODE_FIELD,
-    VC1_CODE_FRAME,
-    VC1_CODE_ENTRYPOINT,
-    VC1_CODE_SEQHDR,
-};
-//@}
-
 /** Available Profiles */
 //@{
 enum Profile {
@@ -4173,8 +4161,6 @@ static void vc1_decode_blocks(VC1Context *v)
     }
 }
 
-#define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0)
-
 /** Find VC-1 marker in buffer
  * @return position where next marker starts or end of buffer if no marker found
  */
@@ -4541,94 +4527,3 @@ AVCodec wmv3_decoder = {
     CODEC_CAP_DELAY,
     NULL
 };
-
-#ifdef CONFIG_VC1_PARSER
-/**
- * finds the end of the current frame in the bitstream.
- * @return the position of the first byte of the next frame, or -1
- */
-static int vc1_find_frame_end(ParseContext *pc, const uint8_t *buf,
-                               int buf_size) {
-    int pic_found, i;
-    uint32_t state;
-
-    pic_found= pc->frame_start_found;
-    state= pc->state;
-
-    i=0;
-    if(!pic_found){
-        for(i=0; i<buf_size; i++){
-            state= (state<<8) | buf[i];
-            if(state == VC1_CODE_FRAME || state == VC1_CODE_FIELD){
-                i++;
-                pic_found=1;
-                break;
-            }
-        }
-    }
-
-    if(pic_found){
-        /* EOF considered as end of frame */
-        if (buf_size == 0)
-            return 0;
-        for(; i<buf_size; i++){
-            state= (state<<8) | buf[i];
-            if(IS_MARKER(state) && state != VC1_CODE_FIELD && state != VC1_CODE_SLICE){
-                pc->frame_start_found=0;
-                pc->state=-1;
-                return i-3;
-            }
-        }
-    }
-    pc->frame_start_found= pic_found;
-    pc->state= state;
-    return END_NOT_FOUND;
-}
-
-static int vc1_parse(AVCodecParserContext *s,
-                           AVCodecContext *avctx,
-                           uint8_t **poutbuf, int *poutbuf_size,
-                           const uint8_t *buf, int buf_size)
-{
-    ParseContext *pc = s->priv_data;
-    int next;
-
-    if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
-        next= buf_size;
-    }else{
-        next= vc1_find_frame_end(pc, buf, buf_size);
-
-        if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
-            *poutbuf = NULL;
-            *poutbuf_size = 0;
-            return buf_size;
-        }
-    }
-    *poutbuf = (uint8_t *)buf;
-    *poutbuf_size = buf_size;
-    return next;
-}
-
-static int vc1_split(AVCodecContext *avctx,
-                           const uint8_t *buf, int buf_size)
-{
-    int i;
-    uint32_t state= -1;
-
-    for(i=0; i<buf_size; i++){
-        state= (state<<8) | buf[i];
-        if(IS_MARKER(state) && state != VC1_CODE_SEQHDR && state != VC1_CODE_ENTRYPOINT)
-            return i-3;
-    }
-    return 0;
-}
-
-AVCodecParser vc1_parser = {
-    { CODEC_ID_VC1 },
-    sizeof(ParseContext1),
-    NULL,
-    vc1_parse,
-    ff_parse1_close,
-    vc1_split,
-};
-#endif /* CONFIG_VC1_PARSER */
diff --git a/libavcodec/vc1.h b/libavcodec/vc1.h
new file mode 100644
index 0000000000..68cb77b1d1
--- /dev/null
+++ b/libavcodec/vc1.h
@@ -0,0 +1,36 @@
+/*
+ * VC-1 and WMV3 decoder
+ * Copyright (c) 2006-2007 Konstantin Shishkov
+ * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
+ *
+ * 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 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/** Markers used if VC-1 AP frame data */
+//@{
+enum VC1Code{
+    VC1_CODE_RES0       = 0x00000100,
+    VC1_CODE_ENDOFSEQ   = 0x0000010A,
+    VC1_CODE_SLICE,
+    VC1_CODE_FIELD,
+    VC1_CODE_FRAME,
+    VC1_CODE_ENTRYPOINT,
+    VC1_CODE_SEQHDR,
+};
+//@}
+
+#define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0)
diff --git a/libavcodec/vc1_parser.c b/libavcodec/vc1_parser.c
new file mode 100644
index 0000000000..1476f9c229
--- /dev/null
+++ b/libavcodec/vc1_parser.c
@@ -0,0 +1,118 @@
+/*
+ * VC-1 and WMV3 parser
+ * Copyright (c) 2006-2007 Konstantin Shishkov
+ * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
+ *
+ * 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 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file vc1_parser.c
+ * VC-1 and WMV3 parser
+ */
+#include "dsputil.h"
+#include "parser.h"
+#include "vc1.h"
+
+/**
+ * finds the end of the current frame in the bitstream.
+ * @return the position of the first byte of the next frame, or -1
+ */
+static int vc1_find_frame_end(ParseContext *pc, const uint8_t *buf,
+                               int buf_size) {
+    int pic_found, i;
+    uint32_t state;
+
+    pic_found= pc->frame_start_found;
+    state= pc->state;
+
+    i=0;
+    if(!pic_found){
+        for(i=0; i<buf_size; i++){
+            state= (state<<8) | buf[i];
+            if(state == VC1_CODE_FRAME || state == VC1_CODE_FIELD){
+                i++;
+                pic_found=1;
+                break;
+            }
+        }
+    }
+
+    if(pic_found){
+        /* EOF considered as end of frame */
+        if (buf_size == 0)
+            return 0;
+        for(; i<buf_size; i++){
+            state= (state<<8) | buf[i];
+            if(IS_MARKER(state) && state != VC1_CODE_FIELD && state != VC1_CODE_SLICE){
+                pc->frame_start_found=0;
+                pc->state=-1;
+                return i-3;
+            }
+        }
+    }
+    pc->frame_start_found= pic_found;
+    pc->state= state;
+    return END_NOT_FOUND;
+}
+
+static int vc1_parse(AVCodecParserContext *s,
+                           AVCodecContext *avctx,
+                           uint8_t **poutbuf, int *poutbuf_size,
+                           const uint8_t *buf, int buf_size)
+{
+    ParseContext *pc = s->priv_data;
+    int next;
+
+    if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
+        next= buf_size;
+    }else{
+        next= vc1_find_frame_end(pc, buf, buf_size);
+
+        if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
+            *poutbuf = NULL;
+            *poutbuf_size = 0;
+            return buf_size;
+        }
+    }
+    *poutbuf = (uint8_t *)buf;
+    *poutbuf_size = buf_size;
+    return next;
+}
+
+static int vc1_split(AVCodecContext *avctx,
+                           const uint8_t *buf, int buf_size)
+{
+    int i;
+    uint32_t state= -1;
+
+    for(i=0; i<buf_size; i++){
+        state= (state<<8) | buf[i];
+        if(IS_MARKER(state) && state != VC1_CODE_SEQHDR && state != VC1_CODE_ENTRYPOINT)
+            return i-3;
+    }
+    return 0;
+}
+
+AVCodecParser vc1_parser = {
+    { CODEC_ID_VC1 },
+    sizeof(ParseContext1),
+    NULL,
+    vc1_parse,
+    ff_parse1_close,
+    vc1_split,
+};
-- 
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