From be1e2a2bfa592ff14355c6b97e90c530e2c0fcc0 Mon Sep 17 00:00:00 2001
From: Bartlomiej Wolowiec <bartek.wolowiec@gmail.com>
Date: Fri, 28 Mar 2008 19:59:58 +0000
Subject: [PATCH] removal of stream_type in AACAC3ParseContext and adding
 AACAC3FrameFlag

Originally committed as revision 12622 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/aac_ac3_parser.c |  3 ++-
 libavcodec/aac_ac3_parser.h |  9 +++++++--
 libavcodec/aac_parser.c     |  5 ++---
 libavcodec/ac3_parser.c     | 14 +++++++++++++-
 4 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/libavcodec/aac_ac3_parser.c b/libavcodec/aac_ac3_parser.c
index c72965a..1193647 100644
--- a/libavcodec/aac_ac3_parser.c
+++ b/libavcodec/aac_ac3_parser.c
@@ -29,6 +29,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
                      const uint8_t *buf, int buf_size)
 {
     AACAC3ParseContext *s = s1->priv_data;
+    AACAC3FrameFlag frame_flag;
     const uint8_t *buf_ptr;
     int len;
 
@@ -50,7 +51,7 @@ int ff_aac_ac3_parse(AVCodecParserContext *s1,
 
         if (s->frame_size == 0) {
             if ((s->inbuf_ptr - s->inbuf) == s->header_size) {
-                len = s->sync(s);
+                len = s->sync(s, &frame_flag);
                 if (len == 0) {
                     /* no sync found : move by one byte (inefficient, but simple!) */
                     memmove(s->inbuf, s->inbuf + 1, s->header_size - 1);
diff --git a/libavcodec/aac_ac3_parser.h b/libavcodec/aac_ac3_parser.h
index 4998250..ec9ce48 100644
--- a/libavcodec/aac_ac3_parser.h
+++ b/libavcodec/aac_ac3_parser.h
@@ -26,18 +26,23 @@
 #include <stdint.h>
 #include "avcodec.h"
 
+typedef enum{
+    FRAME_COMPLETE,    ///< Complete frame, ends previous frame
+    FRAME_START,       ///< Frame start, ends previous frame
+    FRAME_CONTINUATION ///< Part of the previous frame
+}AACAC3FrameFlag;
+
 typedef struct AACAC3ParseContext {
     uint8_t *inbuf_ptr;
     int frame_size;
     int header_size;
-    int (*sync)(struct AACAC3ParseContext *hdr_info);
+    int (*sync)(struct AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag);
     uint8_t inbuf[8192]; /* input buffer */
 
     int channels;
     int sample_rate;
     int bit_rate;
     int samples;
-    uint8_t stream_type;
 } AACAC3ParseContext;
 
 int ff_aac_ac3_parse(AVCodecParserContext *s1,
diff --git a/libavcodec/aac_parser.c b/libavcodec/aac_parser.c
index 45c8b95..3a20129 100644
--- a/libavcodec/aac_parser.c
+++ b/libavcodec/aac_parser.c
@@ -23,7 +23,6 @@
 #include "parser.h"
 #include "aac_ac3_parser.h"
 #include "bitstream.h"
-#include "ac3.h"
 
 
 #define AAC_HEADER_SIZE 7
@@ -39,7 +38,7 @@ static const int aac_channels[8] = {
 };
 
 
-static int aac_sync(AACAC3ParseContext *hdr_info)
+static int aac_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
 {
     GetBitContext bits;
     int size, rdb, ch, sr;
@@ -77,6 +76,7 @@ static int aac_sync(AACAC3ParseContext *hdr_info)
     hdr_info->sample_rate = aac_sample_rates[sr];
     hdr_info->samples = (rdb + 1) * 1024;
     hdr_info->bit_rate = size * 8 * hdr_info->sample_rate / hdr_info->samples;
+    *flag = FRAME_COMPLETE;
 
     return size;
 }
@@ -84,7 +84,6 @@ static int aac_sync(AACAC3ParseContext *hdr_info)
 static av_cold int aac_parse_init(AVCodecParserContext *s1)
 {
     AACAC3ParseContext *s = s1->priv_data;
-    s->stream_type = EAC3_STREAM_TYPE_INDEPENDENT;
     s->inbuf_ptr = s->inbuf;
     s->header_size = AAC_HEADER_SIZE;
     s->sync = aac_sync;
diff --git a/libavcodec/ac3_parser.c b/libavcodec/ac3_parser.c
index 7f0818b..ea7f592 100644
--- a/libavcodec/ac3_parser.c
+++ b/libavcodec/ac3_parser.c
@@ -123,7 +123,7 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
     return 0;
 }
 
-static int ac3_sync(AACAC3ParseContext *hdr_info)
+static int ac3_sync(AACAC3ParseContext *hdr_info, AACAC3FrameFlag *flag)
 {
     int err;
     AC3HeaderInfo hdr;
@@ -137,6 +137,18 @@ static int ac3_sync(AACAC3ParseContext *hdr_info)
     hdr_info->bit_rate = hdr.bit_rate;
     hdr_info->channels = hdr.channels;
     hdr_info->samples = AC3_FRAME_SIZE;
+
+    switch(hdr.stream_type){
+        case EAC3_STREAM_TYPE_INDEPENDENT:
+            *flag = FRAME_START;
+            break;
+        case EAC3_STREAM_TYPE_DEPENDENT:
+            *flag = FRAME_CONTINUATION;
+            break;
+        case EAC3_STREAM_TYPE_AC3_CONVERT:
+            *flag = FRAME_COMPLETE;
+            break;
+    }
     return hdr.frame_size;
 }
 
-- 
2.7.4