Move H.263 parser to its own file.

Originally committed as revision 8934 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -676,6 +676,7 @@ CMDLINE_SELECT="
 dxa_decoder_deps="zlib"
 flashsv_decoder_deps="zlib"
 flashsv_encoder_deps="zlib"
+h263_decoder_deps="h263_parser"
 mpeg_xvmc_decoder_deps="xvmc"
 png_decoder_deps="zlib"
 png_encoder_deps="zlib"

libavcodec/Makefile

@@ -282,7 +282,7 @@ OBJS-$(CONFIG_DCA_PARSER)              += dca_parser.o
 OBJS-$(CONFIG_DVBSUB_PARSER)           += dvbsub_parser.o
 OBJS-$(CONFIG_DVDSUB_PARSER)           += dvdsub_parser.o
 OBJS-$(CONFIG_H261_PARSER)             += h261_parser.o
-OBJS-$(CONFIG_H263_PARSER)             += h263dec.o
+OBJS-$(CONFIG_H263_PARSER)             += h263_parser.o
 OBJS-$(CONFIG_H264_PARSER)             += h264.o
 OBJS-$(CONFIG_MJPEG_PARSER)            += mjpeg.o
 OBJS-$(CONFIG_MPEG4VIDEO_PARSER)       += mpeg4video_parser.o

libavcodec/h263_parser.c

@@ -0,0 +1,91 @@
+/*
+ * H.263 parser
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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 h263_parser.c
+ * H.263 parser
+ */
+
+#include "parser.h"
+
+int ff_h263_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
+    int vop_found, i;
+    uint32_t state;
+
+    vop_found= pc->frame_start_found;
+    state= pc->state;
+
+    i=0;
+    if(!vop_found){
+        for(i=0; i<buf_size; i++){
+            state= (state<<8) | buf[i];
+            if(state>>(32-22) == 0x20){
+                i++;
+                vop_found=1;
+                break;
+            }
+        }
+    }
+
+    if(vop_found){
+      for(; i<buf_size; i++){
+        state= (state<<8) | buf[i];
+        if(state>>(32-22) == 0x20){
+            pc->frame_start_found=0;
+            pc->state=-1;
+            return i-3;
+        }
+      }
+    }
+    pc->frame_start_found= vop_found;
+    pc->state= state;
+
+    return END_NOT_FOUND;
+}
+
+static int h263_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;
+
+    next= ff_h263_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;
+}
+
+AVCodecParser h263_parser = {
+    { CODEC_ID_H263 },
+    sizeof(ParseContext),
+    NULL,
+    h263_parse,
+    ff_parse_close,
+};

libavcodec/h263_parser.h

@@ -0,0 +1,22 @@
+/*
+ * H.263 parser
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
+
+int ff_h263_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);

libavcodec/h263dec.c

@@ -28,6 +28,7 @@
 #include "avcodec.h"
 #include "dsputil.h"
 #include "mpegvideo.h"
+#include "h263_parser.h"
 
 //#define DEBUG
 //#define PRINT_FRAME_TIME
@@ -358,64 +359,6 @@ int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
     return END_NOT_FOUND;
 }
 
-static int h263_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
-    int vop_found, i;
-    uint32_t state;
-
-    vop_found= pc->frame_start_found;
-    state= pc->state;
-
-    i=0;
-    if(!vop_found){
-        for(i=0; i<buf_size; i++){
-            state= (state<<8) | buf[i];
-            if(state>>(32-22) == 0x20){
-                i++;
-                vop_found=1;
-                break;
-            }
-        }
-    }
-
-    if(vop_found){
-      for(; i<buf_size; i++){
-        state= (state<<8) | buf[i];
-        if(state>>(32-22) == 0x20){
-            pc->frame_start_found=0;
-            pc->state=-1;
-            return i-3;
-        }
-      }
-    }
-    pc->frame_start_found= vop_found;
-    pc->state= state;
-
-    return END_NOT_FOUND;
-}
-
-#ifdef CONFIG_H263_PARSER
-static int h263_parse(AVCodecParserContext *s,
-                           AVCodecContext *avctx,
-                           const uint8_t **poutbuf, int *poutbuf_size,
-                           const uint8_t *buf, int buf_size)
-{
-    ParseContext *pc = s->priv_data;
-    int next;
-
-    next= h263_find_frame_end(pc, buf, buf_size);
-
-    if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
-        *poutbuf = NULL;
-        *poutbuf_size = 0;
-        return buf_size;
-    }
-
-    *poutbuf = buf;
-    *poutbuf_size = buf_size;
-    return next;
-}
-#endif
-
 int ff_h263_decode_frame(AVCodecContext *avctx,
                              void *data, int *data_size,
                              uint8_t *buf, int buf_size)
@@ -454,7 +397,7 @@ uint64_t time= rdtsc();
         if(s->codec_id==CODEC_ID_MPEG4){
             next= ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
         }else if(s->codec_id==CODEC_ID_H263){
-            next= h263_find_frame_end(&s->parse_context, buf, buf_size);
+            next= ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
         }else{
             av_log(s->avctx, AV_LOG_ERROR, "this codec does not support truncated bitstreams\n");
             return -1;
@@ -902,13 +845,3 @@ AVCodec flv_decoder = {
     ff_h263_decode_frame,
     CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1
 };
-
-#ifdef CONFIG_H263_PARSER
-AVCodecParser h263_parser = {
-    { CODEC_ID_H263 },
-    sizeof(ParseContext),
-    NULL,
-    h263_parse,
-    ff_parse_close,
-};
-#endif