[FFmpeg-cvslog] avcodec/vbn(dec|enc): Avoid always-false checks

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Tue Apr 12 19:58:16 2022 +0200| [cc0a4fa6304ce0f608a058dc80e3e1f5d7bcfe6a] | committer: Andreas Rheinhardt

avcodec/vbn(dec|enc): Avoid always-false checks

Do this by switching to bytestream2_(get|put)_le32u() from
bytestream2_(get|put)_le32(); it has after all already been checked
that the packet contains at least a full header, making all
the implicit checks in bytestream2_(get|put)_le32() dead code.

Reviewed-by: Marton Balint <cus at passwd.hu>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cc0a4fa6304ce0f608a058dc80e3e1f5d7bcfe6a
---

 libavcodec/vbndec.c | 20 ++++++++++----------
 libavcodec/vbnenc.c | 22 +++++++++++-----------
 2 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/libavcodec/vbndec.c b/libavcodec/vbndec.c
index 56bfb1d544..a6046c766a 100644
--- a/libavcodec/vbndec.c
+++ b/libavcodec/vbndec.c
@@ -71,20 +71,20 @@ static int vbn_decode_frame(AVCodecContext *avctx,
         return AVERROR_INVALIDDATA;
     }
 
-    if (bytestream2_get_le32(gb) != VBN_MAGIC ||
-        bytestream2_get_le32(gb) != VBN_MAJOR ||
-        bytestream2_get_le32(gb) != VBN_MINOR) {
+    if (bytestream2_get_le32u(gb) != VBN_MAGIC ||
+        bytestream2_get_le32u(gb) != VBN_MAJOR ||
+        bytestream2_get_le32u(gb) != VBN_MINOR) {
         av_log(avctx, AV_LOG_ERROR, "Invalid VBN header\n");
         return AVERROR_INVALIDDATA;
     }
 
-    width       = bytestream2_get_le32(gb);
-    height      = bytestream2_get_le32(gb);
-    components  = bytestream2_get_le32(gb);
-    format      = bytestream2_get_le32(gb);
-    pix_fmt     = bytestream2_get_le32(gb);
-    bytestream2_get_le32(gb); // mipmaps
-    data_size   = bytestream2_get_le32(gb);
+    width       = bytestream2_get_le32u(gb);
+    height      = bytestream2_get_le32u(gb);
+    components  = bytestream2_get_le32u(gb);
+    format      = bytestream2_get_le32u(gb);
+    pix_fmt     = bytestream2_get_le32u(gb);
+    bytestream2_get_le32u(gb); // mipmaps
+    data_size   = bytestream2_get_le32u(gb);
     bytestream2_seek(gb, VBN_HEADER_SIZE, SEEK_SET);
 
     compression = format & 0xffffff00;
diff --git a/libavcodec/vbnenc.c b/libavcodec/vbnenc.c
index 03d36ccc86..ec04566a32 100644
--- a/libavcodec/vbnenc.c
+++ b/libavcodec/vbnenc.c
@@ -97,18 +97,18 @@ static int vbn_encode(AVCodecContext *avctx, AVPacket *pkt,
 
     memset(pkt->data, 0, VBN_HEADER_SIZE);
     bytestream2_init_writer(pb, pkt->data, pkt_size);
-    bytestream2_put_le32(pb, VBN_MAGIC);
-    bytestream2_put_le32(pb, VBN_MAJOR);
-    bytestream2_put_le32(pb, VBN_MINOR);
-    bytestream2_put_le32(pb, frame->width);
-    bytestream2_put_le32(pb, frame->height);
-    bytestream2_put_le32(pb, frame->format == AV_PIX_FMT_RGBA ? 4 : 3);
-    bytestream2_put_le32(pb, ctx->format);
-    bytestream2_put_le32(pb, frame->format == AV_PIX_FMT_RGBA ? VBN_PIX_RGBA : VBN_PIX_RGB);
-    bytestream2_put_le32(pb, 0); // mipmaps
-    bytestream2_put_le32(pb, pkt_size - VBN_HEADER_SIZE);
+    bytestream2_put_le32u(pb, VBN_MAGIC);
+    bytestream2_put_le32u(pb, VBN_MAJOR);
+    bytestream2_put_le32u(pb, VBN_MINOR);
+    bytestream2_put_le32u(pb, frame->width);
+    bytestream2_put_le32u(pb, frame->height);
+    bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? 4 : 3);
+    bytestream2_put_le32u(pb, ctx->format);
+    bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? VBN_PIX_RGBA : VBN_PIX_RGB);
+    bytestream2_put_le32u(pb, 0); // mipmaps
+    bytestream2_put_le32u(pb, pkt_size - VBN_HEADER_SIZE);
     bytestream2_seek_p(pb, 64, SEEK_SET);
-    bytestream2_put_le32(pb, pkt_size - VBN_HEADER_SIZE);
+    bytestream2_put_le32u(pb, pkt_size - VBN_HEADER_SIZE);
 
     if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) {
         ctx->enc.frame_data.in = (frame->height - 1) * frame->linesize[0] + frame->data[0];