Move isom_write_avcc() and related functions into a separate file.

Originally committed as revision 11498 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 1 insertions, 113 deletions

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 377d03a6b9..0ee005820f 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -23,6 +23,7 @@
 #include "riff.h"
 #include "avio.h"
 #include "isom.h"
+#include "avc.h"
 
 #undef NDEBUG
 #include <assert.h>
@@ -415,119 +416,6 @@ static int mov_write_svq3_tag(ByteIOContext *pb)
     return 0x15;
 }
 
-static uint8_t *avc_find_startcode( uint8_t *p, uint8_t *end )
-{
-    uint8_t *a = p + 4 - ((long)p & 3);
-
-    for( end -= 3; p < a && p < end; p++ ) {
-        if( p[0] == 0 && p[1] == 0 && p[2] == 1 )
-            return p;
-    }
-
-    for( end -= 3; p < end; p += 4 ) {
-        uint32_t x = *(uint32_t*)p;
-//      if( (x - 0x01000100) & (~x) & 0x80008000 ) // little endian
-//      if( (x - 0x00010001) & (~x) & 0x00800080 ) // big endian
-        if( (x - 0x01010101) & (~x) & 0x80808080 ) { // generic
-            if( p[1] == 0 ) {
-                if( p[0] == 0 && p[2] == 1 )
-                    return p-1;
-                if( p[2] == 0 && p[3] == 1 )
-                    return p;
-            }
-            if( p[3] == 0 ) {
-                if( p[2] == 0 && p[4] == 1 )
-                    return p+1;
-                if( p[4] == 0 && p[5] == 1 )
-                    return p+2;
-            }
-        }
-    }
-
-    for( end += 3; p < end; p++ ) {
-        if( p[0] == 0 && p[1] == 0 && p[2] == 1 )
-            return p;
-    }
-
-    return end + 3;
-}
-
-static int avc_parse_nal_units(uint8_t *buf_in, uint8_t **buf, int *size)
-{
-    ByteIOContext *pb;
-    uint8_t *p = buf_in;
-    uint8_t *end = p + *size;
-    uint8_t *nal_start, *nal_end;
-    int ret = url_open_dyn_buf(&pb);
-    if(ret < 0)
-        return ret;
-
-    nal_start = avc_find_startcode(p, end);
-    while (nal_start < end) {
-        while(!*(nal_start++));
-        nal_end = avc_find_startcode(nal_start, end);
-        put_be32(pb, nal_end - nal_start);
-        put_buffer(pb, nal_start, nal_end - nal_start);
-        nal_start = nal_end;
-    }
-    av_freep(buf);
-    *size = url_close_dyn_buf(pb, buf);
-    return 0;
-}
-
-static int isom_write_avcc(ByteIOContext *pb, uint8_t *data, int len)
-{
-    if (len > 6) {
-        /* check for h264 start code */
-        if (AV_RB32(data) == 0x00000001) {
-            uint8_t *buf=NULL, *end;
-            uint32_t sps_size=0, pps_size=0;
-            uint8_t *sps=0, *pps=0;
-
-            int ret = avc_parse_nal_units(data, &buf, &len);
-            if (ret < 0)
-                return ret;
-            data = buf;
-            end = buf + len;
-
-            /* look for sps and pps */
-            while (buf < end) {
-                unsigned int size;
-                uint8_t nal_type;
-                size = AV_RB32(buf);
-                nal_type = buf[4] & 0x1f;
-                if (nal_type == 7) { /* SPS */
-                    sps = buf + 4;
-                    sps_size = size;
-                } else if (nal_type == 8) { /* PPS */
-                    pps = buf + 4;
-                    pps_size = size;
-                }
-                buf += size + 4;
-            }
-            assert(sps);
-            assert(pps);
-
-            put_byte(pb, 1); /* version */
-            put_byte(pb, sps[1]); /* profile */
-            put_byte(pb, sps[2]); /* profile compat */
-            put_byte(pb, sps[3]); /* level */
-            put_byte(pb, 0xff); /* 6 bits reserved (111111) + 2 bits nal size length - 1 (11) */
-            put_byte(pb, 0xe1); /* 3 bits reserved (111) + 5 bits number of sps (00001) */
-
-            put_be16(pb, sps_size);
-            put_buffer(pb, sps, sps_size);
-            put_byte(pb, 1); /* number of pps */
-            put_be16(pb, pps_size);
-            put_buffer(pb, pps, pps_size);
-            av_free(data);
-        } else {
-            put_buffer(pb, data, len);
-        }
-    }
-    return 0;
-}
-
 static int mov_write_avcc_tag(ByteIOContext *pb, MOVTrack *track)
 {
     offset_t pos = url_ftell(pb);