+
+static av_always_inline unsigned int copy_bits(PutBitContext *pb,
+ GetBitContext *gb,
+ int bits)
+{
+ unsigned int el = get_bits(gb, bits);
+ put_bits(pb, bits, el);
+ return el;
+}
+
+int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
+{
+ int five_bit_ch, four_bit_ch, comment_size, bits;
+ int offset = put_bits_count(pb);
+
+ copy_bits(pb, gb, 10); //Tag, Object Type, Frequency
+ five_bit_ch = copy_bits(pb, gb, 4); //Front
+ five_bit_ch += copy_bits(pb, gb, 4); //Side
+ five_bit_ch += copy_bits(pb, gb, 4); //Back
+ four_bit_ch = copy_bits(pb, gb, 2); //LFE
+ four_bit_ch += copy_bits(pb, gb, 3); //Data
+ five_bit_ch += copy_bits(pb, gb, 4); //Coupling
+ if (copy_bits(pb, gb, 1)) //Mono Mixdown
+ copy_bits(pb, gb, 4);
+ if (copy_bits(pb, gb, 1)) //Stereo Mixdown
+ copy_bits(pb, gb, 4);
+ if (copy_bits(pb, gb, 1)) //Matrix Mixdown
+ copy_bits(pb, gb, 3);
+ for (bits = five_bit_ch*5+four_bit_ch*4; bits > 16; bits -= 16)
+ copy_bits(pb, gb, 16);
+ if (bits)
+ copy_bits(pb, gb, bits);
+ align_put_bits(pb);
+ align_get_bits(gb);
+ comment_size = copy_bits(pb, gb, 8);
+ for (; comment_size > 0; comment_size--)
+ copy_bits(pb, gb, 8);
+
+ return put_bits_count(pb) - offset;
+}