From 53aa68b3290533eeaae7812ad1c30de5f783e9f6 Mon Sep 17 00:00:00 2001
From: Stefan Gehrer <stefan.gehrer@gmx.de>
Date: Sun, 12 Nov 2006 20:18:07 +0000
Subject: move all cavs-parsing to cavs.c This should help building parser
 without decoder

Originally committed as revision 6993 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/cavs.c | 124 +++++++++++++++++++++++++++++++++++-------------------
 1 file changed, 81 insertions(+), 43 deletions(-)

(limited to 'libavcodec/cavs.c')

diff --git a/libavcodec/cavs.c b/libavcodec/cavs.c
index 6ecfb79718..2bedc08324 100644
--- a/libavcodec/cavs.c
+++ b/libavcodec/cavs.c
@@ -31,6 +31,7 @@
 #include "mpegvideo.h"
 #include "cavsdata.h"
 
+#ifdef CONFIG_CAVS_DECODER
 typedef struct {
     MpegEncContext s;
     Picture picture; ///< currently decoded frame
@@ -1318,49 +1319,6 @@ static int decode_seq_header(AVSContext *h) {
     return 0;
 }
 
-/**
- * finds the end of the current frame in the bitstream.
- * @return the position of the first byte of the next frame, or -1
- */
-int ff_cavs_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 == PIC_I_START_CODE || state == PIC_PB_START_CODE){
-                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((state&0xFFFFFF00) == 0x100){
-                if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
-                    pc->frame_start_found=0;
-                    pc->state=-1;
-                    return i-3;
-                }
-            }
-        }
-    }
-    pc->frame_start_found= pic_found;
-    pc->state= state;
-    return END_NOT_FOUND;
-}
-
 void ff_cavs_flush(AVCodecContext * avctx) {
     AVSContext *h = avctx->priv_data;
     h->got_keyframe = 0;
@@ -1500,3 +1458,83 @@ AVCodec cavs_decoder = {
     CODEC_CAP_DR1 | CODEC_CAP_DELAY,
     .flush= ff_cavs_flush,
 };
+#endif /* CONFIG_CAVS_DECODER */
+
+#ifdef CONFIG_CAVSVIDEO_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 cavs_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 == PIC_I_START_CODE || state == PIC_PB_START_CODE){
+                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((state&0xFFFFFF00) == 0x100){
+                if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
+                    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 cavsvideo_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= cavs_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 cavsvideo_parser = {
+    { CODEC_ID_CAVS },
+    sizeof(ParseContext1),
+    NULL,
+    cavsvideo_parse,
+    ff_parse1_close,
+    ff_mpeg4video_split,
+};
+#endif /* CONFIG_CAVSVIDEO_PARSER */
-- 
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