Merge commit '43778a50'

* commit '43778a50':
  Support AV1 encoding using libaom

This contains some extra changes taken from the libvpx encoder
wrapper, most of them contained in the set_pix_fmt() function.
Merged-by: James Almer <jamrial@gmail.com>

configure

@@ -3007,6 +3007,7 @@ h264_videotoolbox_encoder_select="videotoolbox_encoder"
 hevc_videotoolbox_encoder_deps="pthreads"
 hevc_videotoolbox_encoder_select="videotoolbox_encoder"
 libaom_av1_decoder_deps="libaom"
+libaom_av1_encoder_deps="libaom"
 libcelt_decoder_deps="libcelt"
 libcodec2_decoder_deps="libcodec2"
 libcodec2_encoder_deps="libcodec2"

libavcodec/Makefile

@@ -940,6 +940,7 @@ OBJS-$(CONFIG_ILBC_AT_ENCODER)            += audiotoolboxenc.o
 OBJS-$(CONFIG_PCM_ALAW_AT_ENCODER)        += audiotoolboxenc.o
 OBJS-$(CONFIG_PCM_MULAW_AT_ENCODER)       += audiotoolboxenc.o
 OBJS-$(CONFIG_LIBAOM_AV1_DECODER)         += libaomdec.o
+OBJS-$(CONFIG_LIBAOM_AV1_ENCODER)         += libaomenc.o
 OBJS-$(CONFIG_LIBCELT_DECODER)            += libcelt_dec.o
 OBJS-$(CONFIG_LIBCODEC2_DECODER)          += libcodec2.o codec2utils.o
 OBJS-$(CONFIG_LIBCODEC2_ENCODER)          += libcodec2.o codec2utils.o

libavcodec/allcodecs.c

@@ -664,6 +664,7 @@ extern AVCodec ff_pcm_mulaw_at_decoder;
 extern AVCodec ff_qdmc_at_decoder;
 extern AVCodec ff_qdm2_at_decoder;
 extern AVCodec ff_libaom_av1_decoder;
+extern AVCodec ff_libaom_av1_encoder;
 extern AVCodec ff_libcelt_decoder;
 extern AVCodec ff_libcodec2_encoder;
 extern AVCodec ff_libcodec2_decoder;

libavcodec/avcodec.h

@@ -2933,6 +2933,10 @@ typedef struct AVCodecContext {
 #define FF_PROFILE_HEVC_MAIN_STILL_PICTURE          3
 #define FF_PROFILE_HEVC_REXT                        4
 
+#define FF_PROFILE_AV1_MAIN                         0
+#define FF_PROFILE_AV1_HIGH                         1
+#define FF_PROFILE_AV1_PROFESSIONAL                 2
+
 #define FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT            0xc0
 #define FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT 0xc1
 #define FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT         0xc2