[FFmpeg-cvslog] mpegaudiodec_template: disable CRC checking for layers 1 and 2

[Lynne]

ffmpeg | branch: master | Lynne <dev at lynne.ee> | Sun Aug  2 22:45:00 2020 +0200| [b48397e7b84864f2d4c70361a4c4bed93e826753] | committer: Lynne

mpegaudiodec_template: disable CRC checking for layers 1 and 2

Layers 1 and 2 use lengths in bits which are not a multiple of 8,
and our CRC works on a per-byte basis.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b48397e7b84864f2d4c70361a4c4bed93e826753
---

 libavcodec/mpegaudiodec_template.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/mpegaudiodec_template.c b/libavcodec/mpegaudiodec_template.c
index 3d7e3ba4f2..f03d7bc275 100644
--- a/libavcodec/mpegaudiodec_template.c
+++ b/libavcodec/mpegaudiodec_template.c
@@ -1566,7 +1566,7 @@ static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples,
 
     init_get_bits(&s->gb, buf + HEADER_SIZE, (buf_size - HEADER_SIZE) * 8);
 
-    if (s->error_protection) {
+    if (s->error_protection && s->layer == 3) {
         uint16_t crc = get_bits(&s->gb, 16);
         if (s->err_recognition & AV_EF_CRCCHECK) {
             const int sec_len = s->lsf ? ((s->nb_channels == 1) ? 9  : 17) :