46 while (root * 2 + 1 <
size) {
47 int child = root * 2 + 1;
68 if (!
h || !up || !
len || !
map) {
73 for (
i = 0;
i<stats_size;
i++) {
84 for (
i =
size / 2 - 1;
i >= 0;
i--)
87 for (next =
size; next <
size * 2 - 1; next++) {
89 uint64_t min1v =
h[0].val;
104 if (dst[
map[
i]] >= 32)
break;
117 Node *nodes,
int node,
118 uint32_t pfx,
int pl,
int *
pos,
int no_zero_count)
123 if (
s !=
HNODE || (no_zero_count && !nodes[node].count)) {
148 &
pos, no_zero_count);
149 return ff_init_vlc_sparse(vlc, nb_bits,
pos, lens, 2, 2,
bits, 4, 4, xlat, 1, 1, 0);
164 for (
i = 0;
i < nb_codes;
i++) {
172 "Too high symbol frequencies. "
173 "Tree construction is not possible\n");
178 nodes[nb_codes*2-1].
count = 0;
179 for (
i = 0;
i < nb_codes * 2 - 1;
i += 2) {
183 for(j = cur_node; j >
i + 2; j--){
184 if(cur_count > nodes[j-1].count ||
185 (cur_count == nodes[j-1].count &&
188 nodes[j] = nodes[j - 1];
191 nodes[j].
count = cur_count;
static double val(void *priv, double ch)
Libavcodec external API header.
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
#define flags(name, subs,...)
common internal and external API header
#define FFSWAP(type, a, b)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats, int stats_size, int skip0)
static void heap_sift(HeapElem *h, int root, int size)
static void get_tree_codes(uint32_t *bits, int16_t *lens, uint8_t *xlat, Node *nodes, int node, uint32_t pfx, int pl, int *pos, int no_zero_count)
int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bits, Node *nodes, HuffCmp cmp, int flags)
nodes size must be 2*nb_codes first nb_codes nodes.count must be set
static int build_huff_tree(VLC *vlc, Node *nodes, int head, int flags, int nb_bits)
huffman tree builder and VLC generator
#define FF_HUFFMAN_FLAG_ZERO_COUNT
int(* HuffCmp)(const void *va, const void *vb)
#define FF_HUFFMAN_FLAG_HNODE_FIRST
const VDPAUPixFmtMap * map
static av_always_inline int cmp(MpegEncContext *s, const int x, const int y, const int subx, const int suby, const int size, const int h, int ref_index, int src_index, me_cmp_func cmp_func, me_cmp_func chroma_cmp_func, const int flags)
compares a block (either a full macroblock or a partition thereof) against a proposed motion-compensa...
#define AV_QSORT(p, num, type, cmp)
Quicksort This sort is fast, and fully inplace but not stable and it is possible to construct input t...
main external API structure.
#define av_malloc_array(a, b)
static const uint8_t offset[127][2]
static void stats(AVPacket *const *in, int n_in, unsigned *_max, unsigned *_sum)