ffvpx: update ffmpeg to 3.4.4 with AVC/AAC/HEVC/FLAC added.

media/ffvpx/libavcodec/avcodec.symbols

@@ -1,7 +1,13 @@
+audio_resample
+audio_resample_close
 av_bitstream_filter_close
 av_bitstream_filter_filter
 av_bitstream_filter_init
 av_bitstream_filter_next
+av_audio_convert
+av_audio_convert_alloc
+av_audio_convert_free
+av_audio_resample_init
 av_codec_ffversion
 av_codec_get_chroma_intra_matrix
 av_codec_get_codec_descriptor
@@ -20,11 +26,25 @@ av_codec_set_pkt_timebase
 av_codec_set_seek_preroll
 av_copy_packet
 av_copy_packet_side_data
+av_cpb_properties_alloc
+av_dct_calc
+av_dct_end
+av_dct_init
+av_dirac_parse_sequence_header
 av_dup_packet
+av_dv_codec_profile
+av_dv_codec_profile2
+av_dv_frame_profile
 av_fast_padded_malloc
 av_fast_padded_mallocz
+av_fft_calc
+av_fft_end
+av_fft_init
+av_fft_permute
+av_fopen_utf8
 av_free_packet
 av_get_audio_frame_duration
+av_get_audio_frame_duration2
 av_get_bits_per_sample
 av_get_codec_tag_string
 av_get_exact_bits_per_sample
@@ -32,12 +52,25 @@ av_get_pcm_codec
 av_get_profile_name
 av_grow_packet
 av_hwaccel_next
+av_imdct_calc
+av_imdct_half
 av_init_packet
 av_lockmgr_register
 av_log_ask_for_sample
 av_log_missing_feature
+av_mdct_calc
+av_mdct_end
+av_mdct_init
+av_mediacodec_alloc_context
+av_mediacodec_default_free
+av_mediacodec_default_init
+av_mediacodec_release_buffer
 av_new_packet
+av_packet_add_side_data
+av_packet_alloc
+av_packet_clone
 av_packet_copy_props
+av_packet_free
 av_packet_free_side_data
 av_packet_from_data
 av_packet_get_side_data
@@ -61,6 +94,9 @@ av_picture_copy
 av_picture_crop
 av_picture_pad
 av_qsv_alloc_context
+av_rdft_calc
+av_rdft_end
+av_rdft_init
 av_register_bitstream_filter
 av_register_codec_parser
 av_register_hwaccel
@@ -82,6 +118,9 @@ avcodec_chroma_pos_to_enum
 avcodec_close
 avcodec_configuration
 avcodec_copy_context
+avcodec_dct_alloc
+avcodec_dct_get_class
+avcodec_dct_init
 avcodec_decode_audio4
 avcodec_decode_subtitle2
 avcodec_decode_video2
@@ -92,6 +131,9 @@ avcodec_default_get_format
 avcodec_descriptor_get
 avcodec_descriptor_get_by_name
 avcodec_descriptor_next
+avcodec_encode_audio2
+avcodec_encode_subtitle
+avcodec_encode_video2
 avcodec_enum_to_chroma_pos
 avcodec_fill_audio_frame
 avcodec_find_best_pix_fmt2
@@ -115,9 +157,19 @@ avcodec_get_type
 avcodec_is_open
 avcodec_license
 avcodec_open2
+avcodec_parameters_alloc
+avcodec_parameters_copy
+avcodec_parameters_free
+avcodec_parameters_from_context
+avcodec_parameters_to_context
 avcodec_pix_fmt_to_codec_tag
+avcodec_profile_name
+avcodec_receive_frame
+avcodec_receive_packet
 avcodec_register
 avcodec_register_all
+avcodec_send_frame
+avcodec_send_packet
 avcodec_set_dimensions
 avcodec_string
 avcodec_version
@@ -126,6 +178,28 @@ avpicture_fill
 avpicture_free
 avpicture_get_size
 avpicture_layout
+avpriv_aac_parse_header
+avpriv_align_put_bits
+avpriv_bprint_to_extradata
+avpriv_codec_get_cap_skip_frame_fill_param
+avpriv_copy_bits
+avpriv_copy_pce_data
+avpriv_find_pix_fmt
+avpriv_find_start_code
+avpriv_get_raw_pix_fmt_tags
+avpriv_h264_has_num_reorder_frames
+avpriv_lock_avformat
+avpriv_mpa_bitrate_tab
+avpriv_mpa_decode_header
+avpriv_mpa_decode_header2
+avpriv_mpa_freq_tab
+avpriv_mpeg4audio_get_config
+avpriv_mpeg4audio_sample_rates
+avpriv_mpegaudio_decode_header
+avpriv_pix_fmt_bps_avi
+avpriv_pix_fmt_bps_mov
+avpriv_put_string
+avpriv_split_xiph_headers
+avpriv_toupper4
+avpriv_unlock_avformat
 avsubtitle_free
-avcodec_send_packet
-avcodec_receive_frame