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Code Issues Releases Activity

avcodec/ffv1: implement remap for encode/decode_plane()

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Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2025-03-10 00:18:41 +01:00
parent efdf7512a5
commit a8892c5400
2 changed files with 73 additions and 18 deletions
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20
libavcodec/ffv1dec.c
View File

@ -95,7 +95,7 @@ static int is_input_end(RangeCoder *c, GetBitContext *gb, int ac)
static int decode_plane(FFV1Context *f, FFV1SliceContext *sc,
GetBitContext *gb,
uint8_t *src, int w, int h, int stride, int plane_index,
int pixel_stride, int ac)
int remap_index, int pixel_stride, int ac)
{
int x, y;
int16_t *sample[2];
@ -119,12 +119,18 @@ static int decode_plane(FFV1Context *f, FFV1SliceContext *sc,
int ret = decode_line(f, sc, gb, w, sample, plane_index, 8, ac);
if (ret < 0)
return ret;
if (sc->remap)
for (x = 0; x < w; x++)
sample[1][x] = sc->fltmap[remap_index][sample[1][x]];
for (x = 0; x < w; x++)
src[x*pixel_stride + stride * y] = sample[1][x];
} else {
int ret = decode_line(f, sc, gb, w, sample, plane_index, f->avctx->bits_per_raw_sample, ac);
if (ret < 0)
return ret;
if (sc->remap)
for (x = 0; x < w; x++)
sample[1][x] = sc->fltmap[remap_index][sample[1][x]];
if (f->packed_at_lsb) {
for (x = 0; x < w; x++) {
((uint16_t*)(src + stride*y))[x*pixel_stride] = sample[1][x];
@ -341,17 +347,17 @@ static int decode_slice(AVCodecContext *c, void *arg)
const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
const int cx = x >> f->chroma_h_shift;
const int cy = y >> f->chroma_v_shift;
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1, ac);
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 0, 1, ac);
if (f->chroma_planes) {
decode_plane(f, sc, &gb, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1, ac);
decode_plane(f, sc, &gb, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1, ac);
decode_plane(f, sc, &gb, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1, 1, ac);
decode_plane(f, sc, &gb, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 2, 1, ac);
}
if (f->transparency)
decode_plane(f, sc, &gb, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 1, ac);
decode_plane(f, sc, &gb, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], (f->version >= 4 && !f->chroma_planes) ? 1 : 2, 2, 1, ac);
} else if (f->colorspace == 0) {
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0] , width, height, p->linesize[0], 0, 2, ac);
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 2, ac);
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0] , width, height, p->linesize[0], 0, 0, 2, ac);
decode_plane(f, sc, &gb, p->data[0] + ps*x + y*p->linesize[0] + 1, width, height, p->linesize[0], 1, 1, 2, ac);
} else if (f->use32bit) {
uint8_t *planes[4] = { p->data[0] + ps * x + y * p->linesize[0],
p->data[1] + ps * x + y * p->linesize[1],

71
libavcodec/ffv1enc.c
View File

@ -272,7 +272,7 @@ static inline void put_vlc_symbol(PutBitContext *pb, VlcState *const state,
static int encode_plane(FFV1Context *f, FFV1SliceContext *sc,
const uint8_t *src, int w, int h,
int stride, int plane_index, int pixel_stride, int ac)
int stride, int plane_index, int remap_index, int pixel_stride, int ac)
{
int x, y, i, ret;
const int pass1 = !!(f->avctx->flags & AV_CODEC_FLAG_PASS1);
@ -288,9 +288,14 @@ static int encode_plane(FFV1Context *f, FFV1SliceContext *sc,
sample[0][-1]= sample[1][0 ];
sample[1][ w]= sample[1][w-1];
if (f->bits_per_raw_sample <= 8) {
for (x = 0; x < w; x++)
sample[0][x] = src[x * pixel_stride + stride * y];
if (sc->remap)
for (x = 0; x < w; x++)
sample[0][x] = sc->fltmap[remap_index][ sample[0][x] ];
if((ret = encode_line(f, sc, f->avctx, w, sample, plane_index, 8, ac, pass1)) < 0)
return ret;
} else {
@ -303,6 +308,10 @@ static int encode_plane(FFV1Context *f, FFV1SliceContext *sc,
sample[0][x] = ((uint16_t*)(src + stride*y))[x] >> (16 - f->bits_per_raw_sample);
}
}
if (sc->remap)
for (x = 0; x < w; x++)
sample[0][x] = sc->fltmap[remap_index][ (uint16_t)sample[0][x] ];
if((ret = encode_line(f, sc, f->avctx, w, sample, plane_index, f->bits_per_raw_sample, ac, pass1)) < 0)
return ret;
}
@ -310,6 +319,30 @@ static int encode_plane(FFV1Context *f, FFV1SliceContext *sc,
return 0;
}
static void load_plane(FFV1Context *f, FFV1SliceContext *sc,
const uint8_t *src, int w, int h,
int stride, int remap_index, int pixel_stride)
{
int x, y;
memset(sc->fltmap[remap_index], 0, sizeof(sc->fltmap[remap_index]));
for (y = 0; y < h; y++) {
if (f->bits_per_raw_sample <= 8) {
for (x = 0; x < w; x++)
sc->fltmap[remap_index][ src[x * pixel_stride + stride * y] ] = 1;
} else {
if (f->packed_at_lsb) {
for (x = 0; x < w; x++)
sc->fltmap[remap_index][ ((uint16_t*)(src + stride*y))[x] ] = 1;
} else {
for (x = 0; x < w; x++)
sc->fltmap[remap_index][ ((uint16_t*)(src + stride*y))[x] >> (16 - f->bits_per_raw_sample) ] = 1;
}
}
}
}
static void write_quant_table(RangeCoder *c, int16_t *quant_table)
{
int last = 0;
@ -1158,6 +1191,8 @@ static int encode_slice(AVCodecContext *c, void *arg)
const int ps = av_pix_fmt_desc_get(c->pix_fmt)->comp[0].step;
int ret;
RangeCoder c_bak = sc->c;
const int chroma_width = AV_CEIL_RSHIFT(width, f->chroma_h_shift);
const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
const uint8_t *planes[4] = {p->data[0] + ps*x + y*p->linesize[0],
p->data[1] ? p->data[1] + ps*x + y*p->linesize[1] : NULL,
p->data[2] ? p->data[2] + ps*x + y*p->linesize[2] : NULL,
@ -1180,8 +1215,24 @@ retry:
}
if (sc->remap) {
if (f->colorspace == 0) {
av_assert0(0);
if (f->colorspace == 0 && c->pix_fmt != AV_PIX_FMT_YA8) {
const int cx = x >> f->chroma_h_shift;
const int cy = y >> f->chroma_v_shift;
//TODO decide on the order for the encoded remaps and loads. with golomb rice it
// easier to have all range coded ones together, otherwise it may be nicer to handle each plane as a whole?
load_plane(f, sc, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1);
if (f->chroma_planes) {
load_plane(f, sc, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1);
load_plane(f, sc, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 2, 1);
}
if (f->transparency)
load_plane(f, sc, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 3, 1);
} else if (c->pix_fmt == AV_PIX_FMT_YA8) {
load_plane(f, sc, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 2);
load_plane(f, sc, p->data[0] + 1 + ps*x + y*p->linesize[0], width, height, p->linesize[0], 1, 2);
} else if (f->use32bit) {
load_rgb_frame32(f, sc, planes, width, height, p->linesize);
} else
@ -1198,22 +1249,20 @@ retry:
}
if (f->colorspace == 0 && c->pix_fmt != AV_PIX_FMT_YA8) {
const int chroma_width = AV_CEIL_RSHIFT(width, f->chroma_h_shift);
const int chroma_height = AV_CEIL_RSHIFT(height, f->chroma_v_shift);
const int cx = x >> f->chroma_h_shift;
const int cy = y >> f->chroma_v_shift;
ret = encode_plane(f, sc, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 1, ac);
ret = encode_plane(f, sc, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 0, 1, ac);
if (f->chroma_planes) {
ret |= encode_plane(f, sc, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1, ac);
ret |= encode_plane(f, sc, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 1, ac);
ret |= encode_plane(f, sc, p->data[1] + ps*cx+cy*p->linesize[1], chroma_width, chroma_height, p->linesize[1], 1, 1, 1, ac);
ret |= encode_plane(f, sc, p->data[2] + ps*cx+cy*p->linesize[2], chroma_width, chroma_height, p->linesize[2], 1, 2, 1, ac);
}
if (f->transparency)
ret |= encode_plane(f, sc, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2, 1, ac);
ret |= encode_plane(f, sc, p->data[3] + ps*x + y*p->linesize[3], width, height, p->linesize[3], 2, 3, 1, ac);
} else if (c->pix_fmt == AV_PIX_FMT_YA8) {
ret = encode_plane(f, sc, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 2, ac);
ret |= encode_plane(f, sc, p->data[0] + 1 + ps*x + y*p->linesize[0], width, height, p->linesize[0], 1, 2, ac);
ret = encode_plane(f, sc, p->data[0] + ps*x + y*p->linesize[0], width, height, p->linesize[0], 0, 0, 2, ac);
ret |= encode_plane(f, sc, p->data[0] + 1 + ps*x + y*p->linesize[0], width, height, p->linesize[0], 1, 1, 2, ac);
} else if (f->use32bit) {
ret = encode_rgb_frame32(f, sc, planes, width, height, p->linesize, ac);
} else {