avcodec/ac3_parser: recognize LE bitstream variant

5 years ago · 9e0ddb5e80
parent ebc8806b9f
commit 9e0ddb5e80
1 changed files with 6 additions and 0 deletions
--- a/libavcodec/ac3_parser.c
+++ b/libavcodec/ac3_parser.c
@ -201,6 +201,12 @@ static int ac3_sync(uint64_t state, AACAC3ParseContext *hdr_info,
    AC3HeaderInfo hdr;
    GetBitContext gbc;

+    if (tmp.u8[1] == 0x77 && tmp.u8[2] == 0x0b) {
+        FFSWAP(uint8_t, tmp.u8[1], tmp.u8[2]);
+        FFSWAP(uint8_t, tmp.u8[3], tmp.u8[4]);
+        FFSWAP(uint8_t, tmp.u8[5], tmp.u8[6]);
+    }
+
    init_get_bits(&gbc, tmp.u8+8-AC3_HEADER_SIZE, 54);
    err = ff_ac3_parse_header(&gbc, &hdr);