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ffmpeg.wasm-core
Commit f11329e4 authored by Oded Shimon's avatar Oded Shimon
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Original Commit: r100 | ods15 | 2006-10-01 14:01:27 +0200 (Sun, 01 Oct 2006) | 2 lines 

update to global functions now shared in vorbis.h

Originally committed as revision 6504 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent cbf306f3
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Showing with 32 additions and 83 deletions
libavcodec/vorbis_enc.c
View file @ f11329e4
......@@ -32,14 +32,10 @@
//#define ALT_BITSTREAM_WRITER
//#include "bitstream.h"
typedef struct {
int len;
uint32_t codeword;
} cb_entry_t;
typedef struct {
int nentries;
cb_entry_t * entries;
uint8_t * lens;
uint32_t * codewords;
int ndimentions;
float min;
float delta;
......@@ -136,8 +132,6 @@ typedef struct {
uint8_t * buf_ptr;
} PutBitContext;
#define ilog(i) av_log2(2*(i))
static const uint8_t codebook0[] = {
2, 10, 8, 14, 7, 12, 11, 14, 1, 5, 3, 7, 4, 9, 7,
13,
......@@ -643,38 +637,23 @@ static inline int put_bits_count(PutBitContext * pb) {
return pb->total_pos;
}
static inline void put_codeword(PutBitContext * pb, codebook_t * cb, int entry) {
assert(entry >= 0);
assert(entry < cb->nentries);
assert(cb->lens[entry]);
put_bits(pb, cb->lens[entry], cb->codewords[entry]);
}
static int cb_lookup_vals(int lookup, int dimentions, int entries) {
if (lookup == 1) {
int tmp, i;
for (tmp = 0; ; tmp++) {
int n = 1;
for (i = 0; i < dimentions; i++) n *= tmp;
if (n > entries) break;
}
return tmp - 1;
} else if (lookup == 2) return dimentions * entries;
if (lookup == 1) return ff_vorbis_nth_root(entries, dimentions);
else if (lookup == 2) return dimentions * entries;
return 0;
}
static void ready_codebook(codebook_t * cb) {
int h[33] = { 1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
int i;
for (i = 0; i < cb->nentries; i++) {
cb_entry_t * e = &cb->entries[i];
int j = 0;
if (!e->len) continue;
if (h[0]) h[0] = 0;
else {
for (j = e->len; j; j--)
if (h[j]) break;
assert(j);
}
e->codeword = h[j];
h[j] = 0;
for (j++; j <= e->len; j++) h[j] = e->codeword | (1 << (j - 1));
}
for (i = 0; i < 33; i++) assert(!h[i]);
ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries);
if (!cb->lookup) cb->dimentions = NULL;
else {
......@@ -743,7 +722,7 @@ static void ready_residue(residue_t * rc, venc_context_t * venc) {
for (j = 0; j < cb->nentries; j++) {
float a;
if (!cb->entries[j].len) continue;
if (!cb->lens[j]) continue;
a = fabs(cb->dimentions[j * cb->ndimentions]);
if (a > rc->maxes[i][0]) rc->maxes[i][0] = a;
a = fabs(cb->dimentions[j * cb->ndimentions + 1]);
......@@ -782,11 +761,12 @@ static void create_vorbis_context(venc_context_t * venc, AVCodecContext * avccon
cb->delta = cvectors[book].delta;
cb->lookup = cvectors[book].lookup;
cb->seq_p = 0;
cb->entries = av_malloc(sizeof(cb_entry_t) * cb->nentries);
for (i = 0; i < cb->nentries; i++) {
if (i < cvectors[book].len) cb->entries[i].len = cvectors[book].clens[i];
else cb->entries[i].len = 0;
}
cb->lens = av_malloc(sizeof(uint8_t) * cb->nentries);
cb->codewords = av_malloc(sizeof(uint32_t) * cb->nentries);
memcpy(cb->lens, cvectors[book].clens, cvectors[book].len);
memset(cb->lens + cvectors[book].len, 0, cb->nentries - cvectors[book].len);
if (cb->lookup) {
vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries);
cb->quantlist = av_malloc(sizeof(int) * vals);
......@@ -944,30 +924,30 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
put_bits(pb, 16, cb->ndimentions);
put_bits(pb, 24, cb->nentries);
for (i = 1; i < cb->nentries; i++) if (cb->entries[i].len < cb->entries[i-1].len) break;
for (i = 1; i < cb->nentries; i++) if (cb->lens[i] < cb->lens[i-1]) break;
if (i == cb->nentries) ordered = 1;
put_bits(pb, 1, ordered);
if (ordered) {
int len = cb->entries[0].len;
int len = cb->lens[0];
put_bits(pb, 5, len - 1);
i = 0;
while (i < cb->nentries) {
int j;
for (j = 0; j+i < cb->nentries; j++) if (cb->entries[j+i].len != len) break;
for (j = 0; j+i < cb->nentries; j++) if (cb->lens[j+i] != len) break;
put_bits(pb, ilog(cb->nentries - i), j);
i += j;
len++;
}
} else {
int sparse = 0;
for (i = 0; i < cb->nentries; i++) if (!cb->entries[i].len) break;
for (i = 0; i < cb->nentries; i++) if (!cb->lens[i]) break;
if (i != cb->nentries) sparse = 1;
put_bits(pb, 1, sparse);
for (i = 0; i < cb->nentries; i++) {
if (sparse) put_bits(pb, 1, !!cb->entries[i].len);
if (cb->entries[i].len) put_bits(pb, 5, cb->entries[i].len - 1);
if (sparse) put_bits(pb, 1, !!cb->lens[i]);
if (cb->lens[i]) put_bits(pb, 5, cb->lens[i] - 1);
}
}
......@@ -1198,33 +1178,6 @@ static int render_point(int x0, int y0, int x1, int y1, int x) {
return y0 + (x - x0) * (y1 - y0) / (x1 - x0);
}
static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
int dy = y1 - y0;
int adx = x1 - x0;
int ady = FFMAX(dy, -dy);
int base = dy / adx;
int x = x0;
int y = y0;
int err = 0;
int sy;
if (dy < 0) sy = base - 1;
else sy = base + 1;
ady = ady - FFMAX(base, -base) * adx;
if (x >= n) return;
buf[x] = ff_vorbis_floor1_inverse_db_table[y];
for (x = x0 + 1; x < x1; x++) {
if (x >= n) return;
err += ady;
if (err >= adx) {
err -= adx;
y += sy;
} else {
y += base;
}
buf[x] = ff_vorbis_floor1_inverse_db_table[y];
}
}
static void floor_encode(venc_context_t * venc, floor_t * fc, PutBitContext * pb, int * posts, float * floor, int samples) {
int range = 255 / fc->multiplier + 1;
int coded[fc->values]; // first 2 values are unused
......@@ -1280,8 +1233,7 @@ static void floor_encode(venc_context_t * venc, floor_t * fc, PutBitContext * pb
cval |= l << cshift;
cshift += c->subclass;
}
assert(cval < book->nentries);
put_bits(pb, book->entries[cval].len, book->entries[cval].codeword);
put_codeword(pb, book, cval);
}
for (k = 0; k < c->dim; k++) {
int book = c->books[cval & (csub-1)];
......@@ -1289,9 +1241,7 @@ static void floor_encode(venc_context_t * venc, floor_t * fc, PutBitContext * pb
cval >>= c->subclass;
if (book == -1) continue;
if (entry == -1) entry = 0;
assert(entry < venc->codebooks[book].nentries);
assert(entry >= 0);
put_bits(pb, venc->codebooks[book].entries[entry].len, venc->codebooks[book].entries[entry].codeword);
put_codeword(pb, &venc->codebooks[book], entry);
}
}
......@@ -1317,7 +1267,7 @@ static float * put_vector(codebook_t * book, PutBitContext * pb, float * num) {
for (i = 0; i < book->nentries; i++) {
float d = 0.;
int j;
if (!book->entries[i].len) continue;
if (!book->lens[i]) continue;
for (j = 0; j < book->ndimentions; j++) {
float a = (book->dimentions[i * book->ndimentions + j] - num[j]);
d += a*a;
......@@ -1327,7 +1277,7 @@ static float * put_vector(codebook_t * book, PutBitContext * pb, float * num) {
distance = d;
}
}
put_bits(pb, book->entries[entry].len, book->entries[entry].codeword);
put_codeword(pb, book, entry);
return &book->dimentions[entry * book->ndimentions];
}
......@@ -1365,9 +1315,7 @@ static void residue_encode(venc_context_t * venc, residue_t * rc, PutBitContext
entry *= rc->classifications;
entry += classes[j][p + i];
}
assert(entry < book->nentries);
assert(entry >= 0);
put_bits(pb, book->entries[entry].len, book->entries[entry].codeword);
put_codeword(pb, book, entry);
}
for (i = 0; i < classwords && p < partitions; i++, p++) {
for (j = 0; j < channels; j++) {
......@@ -1546,7 +1494,8 @@ static int vorbis_encode_close(AVCodecContext * avccontext)
int i;
if (venc->codebooks) for (i = 0; i < venc->ncodebooks; i++) {
av_freep(&venc->codebooks[i].entries);
av_freep(&venc->codebooks[i].lens);
av_freep(&venc->codebooks[i].codewords);
av_freep(&venc->codebooks[i].quantlist);
av_freep(&venc->codebooks[i].dimentions);
}
......
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