avcodec/codec_internal: Make FFCodec.decode use AVFrame*

This increases type-safety by avoiding conversions from/through void*.
It also avoids the boilerplate "AVFrame *frame = data;" line
for non-subtitle decoders.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/libavcodec/zerocodec.c b/libavcodec/zerocodec.c
index 49b0968129..b4d189cd7a 100644
--- a/libavcodec/zerocodec.c
+++ b/libavcodec/zerocodec.c
@@ -29,11 +29,10 @@ typedef struct ZeroCodecContext {
     FFZStream zstream;
 } ZeroCodecContext;
 
-static int zerocodec_decode_frame(AVCodecContext *avctx, void *data,
+static int zerocodec_decode_frame(AVCodecContext *avctx, AVFrame *pic,
                                   int *got_frame, AVPacket *avpkt)
 {
     ZeroCodecContext *zc = avctx->priv_data;
-    AVFrame *pic         = data;
     AVFrame *prev_pic    = zc->previous_frame;
     z_stream *const zstream = &zc->zstream.zstream;
     uint8_t *prev        = prev_pic->data[0];