improve CRC API

 - don't export any global var
 - provide either generated or hardcoded tables

Originally committed as revision 11409 to svn://svn.ffmpeg.org/ffmpeg/trunk

3 files changed, 4 insertions, 3 deletions

diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 507003184e..3917270b1d 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -318,7 +318,7 @@ static void fill_buffer(ByteIOContext *s)
 }
 
 unsigned long ff_crc04C11DB7_update(unsigned long checksum, const uint8_t *buf, unsigned int len){
-    return av_crc(av_crc04C11DB7, checksum, buf, len);
+    return av_crc(av_crc_get_table(AV_CRC_32_IEEE), checksum, buf, len);
 }
 
 unsigned long get_checksum(ByteIOContext *s){
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index b89bb4421f..b3ab16de0f 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -262,7 +262,8 @@ static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
     if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
         tss->end_of_section_reached = 1;
         if (!tss->check_crc ||
-            av_crc(av_crc04C11DB7, -1, tss->section_buf, tss->section_h_size) == 0)
+            av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
+                   tss->section_buf, tss->section_h_size) == 0)
             tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
     }
 }
diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index b5a63e87ed..49d29aa2b9 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -43,7 +43,7 @@ static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
     unsigned char *q;
     int first, b, len1, left;
 
-    crc = bswap_32(av_crc(av_crc04C11DB7, -1, buf, len - 4));
+    crc = bswap_32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));
     buf[len - 4] = (crc >> 24) & 0xff;
     buf[len - 3] = (crc >> 16) & 0xff;
     buf[len - 2] = (crc >> 8) & 0xff;