build: Let the ffvhuff decoder/encoder depend on the huffyuv decoder/encoder

Almost all of the code is shared so there is little point in
enabling one decoder/encoder without the other.

configure

@@ -1669,8 +1669,8 @@ eatgq_decoder_select="aandcttables dsputil"
 eatqi_decoder_select="aandcttables error_resilience mpegvideo"
 ffv1_decoder_select="dsputil golomb rangecoder"
 ffv1_encoder_select="dsputil rangecoder"
-ffvhuff_decoder_select="dsputil"
-ffvhuff_encoder_select="dsputil huffman"
+ffvhuff_decoder_select="huffyuv_decoder"
+ffvhuff_encoder_select="huffyuv_encoder"
 fic_decoder_select="dsputil golomb"
 flac_decoder_select="golomb"
 flac_encoder_select="dsputil golomb lpc"

libavcodec/Makefile

@@ -168,8 +168,6 @@ OBJS-$(CONFIG_ESCAPE124_DECODER)       += escape124.o
 OBJS-$(CONFIG_ESCAPE130_DECODER)       += escape130.o
 OBJS-$(CONFIG_FFV1_DECODER)            += ffv1dec.o ffv1.o
 OBJS-$(CONFIG_FFV1_ENCODER)            += ffv1enc.o ffv1.o
-OBJS-$(CONFIG_FFVHUFF_DECODER)         += huffyuv.o huffyuvdec.o
-OBJS-$(CONFIG_FFVHUFF_ENCODER)         += huffyuv.o huffyuvenc.o
 OBJS-$(CONFIG_FIC_DECODER)             += fic.o
 OBJS-$(CONFIG_FLAC_DECODER)            += flacdec.o flacdata.o flac.o flacdsp.o
 OBJS-$(CONFIG_FLAC_ENCODER)            += flacenc.o flacdata.o flac.o flacdsp.o

libavcodec/huffyuvdec.c

@@ -737,7 +737,6 @@ static av_cold int decode_end(AVCodecContext *avctx)
     return 0;
 }
 
-#if CONFIG_HUFFYUV_DECODER
 AVCodec ff_huffyuv_decoder = {
     .name             = "huffyuv",
     .long_name        = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
@@ -751,7 +750,6 @@ AVCodec ff_huffyuv_decoder = {
                         CODEC_CAP_FRAME_THREADS,
     .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
 };
-#endif
 
 #if CONFIG_FFVHUFF_DECODER
 AVCodec ff_ffvhuff_decoder = {

libavcodec/huffyuvenc.c

@@ -682,7 +682,6 @@ static av_cold int encode_end(AVCodecContext *avctx)
     return 0;
 }
 
-#if CONFIG_HUFFYUV_ENCODER
 AVCodec ff_huffyuv_encoder = {
     .name           = "huffyuv",
     .long_name      = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
@@ -697,7 +696,6 @@ AVCodec ff_huffyuv_encoder = {
         AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
     },
 };
-#endif
 
 #if CONFIG_FFVHUFF_ENCODER
 AVCodec ff_ffvhuff_encoder = {