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Code Issues Releases Activity

remove render_line from vorbis.h, add ff_vorbis_floor1_render_list instead

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Originally committed as revision 6409 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Oded Shimon 2006-10-01 17:38:07 +00:00
parent 3e66a74072
commit 7f09a56091
2 changed files with 47 additions and 52 deletions
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71
libavcodec/vorbis.c
View File

@ -1230,6 +1230,50 @@ static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
return 0;
}
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 = ABS(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 - ABS(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];
}
}
void ff_vorbis_floor1_render_list(floor1_entry_t * list, int values, uint_fast16_t * y_list, int * flag, int multiplier, float * out, int samples) {
int lx, ly, i;
lx = 0;
ly = y_list[0] * multiplier;
for (i = 1; i < values; i++) {
int pos = list[i].sort;
if (flag[pos]) {
render_line(lx, ly, list[pos].x, y_list[pos] * multiplier, out, samples);
lx = list[pos].x;
ly = y_list[pos] * multiplier;
}
if (lx >= samples) break;
}
if (lx < samples) render_line(lx, ly, samples, ly, out, samples);
}
static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
vorbis_floor1 * vf=&vfu->t1;
GetBitContext *gb=&vc->gb;
@ -1237,7 +1281,7 @@ static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *
uint_fast16_t range=range_v[vf->multiplier-1];
uint_fast16_t floor1_Y[vf->x_list_dim];
uint_fast16_t floor1_Y_final[vf->x_list_dim];
uint_fast8_t floor1_flag[vf->x_list_dim];
int floor1_flag[vf->x_list_dim];
uint_fast8_t class_;
uint_fast8_t cdim;
uint_fast8_t cbits;
@ -1248,7 +1292,6 @@ static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *
uint_fast16_t i,j;
/*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
int_fast16_t dy, err;
uint_fast16_t lx,hx, ly, hy=0;
if (!get_bits1(gb)) return 1; // silence
@ -1353,29 +1396,7 @@ static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *
// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
hx=0;
lx=0;
ly=floor1_Y_final[0]*vf->multiplier; // conforms to SPEC
vec[0]=ff_vorbis_floor1_inverse_db_table[ly];
for(i=1;i<vf->x_list_dim;++i) {
AV_DEBUG(" Looking at post %d \n", i);
if (floor1_flag[vf->list[i].sort]) { // SPEC mispelled
hy=floor1_Y_final[vf->list[i].sort]*vf->multiplier;
hx=vf->list[vf->list[i].sort].x;
render_line(lx, ly, hx, hy, vec, vc->blocksize[1]);
lx=hx;
ly=hy;
}
}
if (hx<vf->list[1].x) {
render_line(hx, hy, vf->list[1].x, hy, vec, vc->blocksize[1]);
}
ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
AV_DEBUG(" Floor decoded\n");

28
libavcodec/vorbis.h
View File

@ -34,33 +34,7 @@ typedef struct {
void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values);
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n)
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num);
static void attribute_unused render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
int dy = y1 - y0;
int adx = x1 - x0;
int ady = ABS(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 - ABS(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];
}
}
void ff_vorbis_floor1_render_list(floor1_entry_t * list, int values, uint_fast16_t * y_list, int * flag, int multiplier, float * out, int samples);
#define ilog(i) av_log2(2*(i))