take a -128..127 value and stbi__clamp it and convert to 0..255

initialize a memory-decode context

------------------------------------------------------------------------------ Decodes the next Huffman code from bit-stream. VP8LFillBitWindow(br) ne

------------------------------------------------------------------------------ Decodes the next Huffman code from bit-stream. FillBitWindow(br) needs

Transpose back and store

Estimates the Entropy + Huffman + other block overhead size cost.

makes sure br->value_ has at least BITS bits worth of data

Test basic constraints: retrieval, maximum number of chunks by index (use -1 to skip) and feature incompatibility (use NO_FLAG to skip). On success re

memcpy() is the safe way of moving potentially unaligned 32b memory.

Return true if input is finished

Helper to create heap-allocated loader inputs (thread will free it)

initialize a callback-based context

For perf reasons this code is duplicated in stbir__resample_horizontal_upsample/downsample, if you change it here change it there too.

Returns the position of the last non-zero coeff plus one

Returns cached frame at the given 'position'.

Removes the histogram 'i' from 'set' by setting it to NULL.

Horizontal add (doubled) of two 16b values, result is 16b. in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ...

Horizontal add (doubled) of two 16b values, result is 16b. in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ...

load *src as epi64, multiply by mult and store result in [out0 ... out3]

Pack R/G/B/A results into 32b output.

Return true if 'size' exceeds the end of the RIFF chunk.

Returns a pointer to the internal buffer.

Must be called to make sure 'io' is initialized properly. Returns false in case of version mismatch. Upon such failure, no other decoding function sho