mlp: initialize all CRC tables in a common function.

This way the decoder does not have to depend on the parser being initialized
before.
Patch by Laurent Aimar <fenrir at via dot ecp dot fr>.

Originally committed as revision 15986 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mlp.c

@@ -43,26 +43,14 @@ const uint8_t ff_mlp_huffman_tables[3][18][2] = {
 static int crc_init = 0;
 static AVCRC crc_63[1024];
 static AVCRC crc_1D[1024];
-
-
-static int crc_init_2D = 0;
 static AVCRC crc_2D[1024];
 
-int av_cold ff_mlp_init_crc2D(AVCodecParserContext *s)
-{
-    if (!crc_init_2D) {
-        av_crc_init(crc_2D, 0, 16, 0x002D, sizeof(crc_2D));
-        crc_init_2D = 1;
-    }
-
-    return 0;
-}
-
 void av_cold ff_mlp_init_crc()
 {
     if (!crc_init) {
         av_crc_init(crc_63, 0,  8,   0x63, sizeof(crc_63));
         av_crc_init(crc_1D, 0,  8,   0x1D, sizeof(crc_1D));
+        av_crc_init(crc_2D, 0, 16, 0x002D, sizeof(crc_2D));
         crc_init = 1;
     }
 }

libavcodec/mlp.h

@@ -106,8 +106,6 @@ uint8_t ff_mlp_restart_checksum(const uint8_t *buf, unsigned int bit_size);
  */
 uint8_t ff_mlp_calculate_parity(const uint8_t *buf, unsigned int buf_size);
 
-int ff_mlp_init_crc2D(AVCodecParserContext *s);
-
 void ff_mlp_init_crc();
 
 /** XOR four bytes into one. */

libavcodec/mlp_parser.c

@@ -150,6 +150,12 @@ typedef struct MLPParseContext
     int num_substreams;
 } MLPParseContext;
 
+static av_cold int mlp_init(AVCodecParserContext *s)
+{
+    ff_mlp_init_crc();
+    return 0;
+}
+
 static int mlp_parse(AVCodecParserContext *s,
                      AVCodecContext *avctx,
                      const uint8_t **poutbuf, int *poutbuf_size,
@@ -283,7 +289,7 @@ lost_sync:
 AVCodecParser mlp_parser = {
     { CODEC_ID_MLP },
     sizeof(MLPParseContext),
-    ff_mlp_init_crc2D,
+    mlp_init,
     mlp_parse,
     NULL,
 };