[FFmpeg-cvslog] avcodec/pngdec: allow for some code path optimizations.
Benoit Fouet
git at videolan.org
Fri Nov 28 16:26:56 CET 2014
ffmpeg | branch: master | Benoit Fouet <benoit.fouet at free.fr> | Fri Nov 28 14:03:08 2014 +0100| [af8804ac86383160c80671c3dcd511510f639f24] | committer: Michael Niedermayer
avcodec/pngdec: allow for some code path optimizations.
Use 'if (CONFIG_APNG_DECODER)' where needed, so that the compiler can
optimize out some portion of code.
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=af8804ac86383160c80671c3dcd511510f639f24
---
libavcodec/pngdec.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index da852c4..a330d36 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -949,7 +949,7 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
for (;;) {
length = bytestream2_get_bytes_left(&s->gb);
if (length <= 0) {
- if (avctx->codec_id == AV_CODEC_ID_APNG && length == 0) {
+ if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && length == 0) {
if (!(s->state & PNG_IDAT))
return 0;
else
@@ -984,14 +984,14 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
goto fail;
break;
case MKTAG('f', 'c', 'T', 'L'):
- if (avctx->codec_id != AV_CODEC_ID_APNG)
+ if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG)
goto skip_tag;
if ((ret = decode_fctl_chunk(avctx, s, length)) < 0)
goto fail;
decode_next_dat = 1;
break;
case MKTAG('f', 'd', 'A', 'T'):
- if (avctx->codec_id != AV_CODEC_ID_APNG)
+ if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG)
goto skip_tag;
if (!decode_next_dat)
goto fail;
@@ -999,7 +999,7 @@ static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s,
length -= 4;
/* fallthrough */
case MKTAG('I', 'D', 'A', 'T'):
- if (avctx->codec_id == AV_CODEC_ID_APNG && !decode_next_dat)
+ if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && !decode_next_dat)
goto skip_tag;
if (decode_idat_chunk(avctx, s, length, p) < 0)
goto fail;
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