310 lines
11 KiB
C
310 lines
11 KiB
C
/*
|
|
* RV30 decoder
|
|
* Copyright (c) 2007 Konstantin Shishkov
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* RV30 decoder
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "mpegutils.h"
|
|
#include "mpegvideo.h"
|
|
#include "golomb.h"
|
|
|
|
#include "rv34.h"
|
|
#include "rv30data.h"
|
|
|
|
|
|
static int rv30_parse_slice_header(RV34DecContext *r, GetBitContext *gb, SliceInfo *si)
|
|
{
|
|
AVCodecContext *avctx = r->s.avctx;
|
|
int mb_bits;
|
|
int w = r->s.width, h = r->s.height;
|
|
int mb_size;
|
|
int rpr;
|
|
|
|
memset(si, 0, sizeof(SliceInfo));
|
|
if(get_bits(gb, 3))
|
|
return -1;
|
|
si->type = get_bits(gb, 2);
|
|
if(si->type == 1) si->type = 0;
|
|
if(get_bits1(gb))
|
|
return -1;
|
|
si->quant = get_bits(gb, 5);
|
|
skip_bits1(gb);
|
|
si->pts = get_bits(gb, 13);
|
|
rpr = get_bits(gb, av_log2(r->max_rpr) + 1);
|
|
if(rpr){
|
|
if (rpr > r->max_rpr) {
|
|
av_log(avctx, AV_LOG_ERROR, "rpr too large\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (avctx->extradata_size < rpr * 2 + 8) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Insufficient extradata - need at least %d bytes, got %d\n",
|
|
8 + rpr * 2, avctx->extradata_size);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
w = r->s.avctx->extradata[6 + rpr*2] << 2;
|
|
h = r->s.avctx->extradata[7 + rpr*2] << 2;
|
|
} else {
|
|
w = r->orig_width;
|
|
h = r->orig_height;
|
|
}
|
|
si->width = w;
|
|
si->height = h;
|
|
mb_size = ((w + 15) >> 4) * ((h + 15) >> 4);
|
|
mb_bits = ff_rv34_get_start_offset(gb, mb_size);
|
|
si->start = get_bits(gb, mb_bits);
|
|
skip_bits1(gb);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Decode 4x4 intra types array.
|
|
*/
|
|
static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t *dst)
|
|
{
|
|
int i, j, k;
|
|
|
|
for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
|
|
for(j = 0; j < 4; j+= 2){
|
|
unsigned code = get_interleaved_ue_golomb(gb) << 1;
|
|
if (code > 80U*2U) {
|
|
av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
|
|
return -1;
|
|
}
|
|
for(k = 0; k < 2; k++){
|
|
int A = dst[-r->intra_types_stride] + 1;
|
|
int B = dst[-1] + 1;
|
|
*dst++ = rv30_itype_from_context[A * 90 + B * 9 + rv30_itype_code[code + k]];
|
|
if(dst[-1] == 9){
|
|
av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction mode\n");
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Decode macroblock information.
|
|
*/
|
|
static int rv30_decode_mb_info(RV34DecContext *r)
|
|
{
|
|
static const int rv30_p_types[6] = { RV34_MB_SKIP, RV34_MB_P_16x16, RV34_MB_P_8x8, -1, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
|
|
static const int rv30_b_types[6] = { RV34_MB_SKIP, RV34_MB_B_DIRECT, RV34_MB_B_FORWARD, RV34_MB_B_BACKWARD, RV34_MB_TYPE_INTRA, RV34_MB_TYPE_INTRA16x16 };
|
|
MpegEncContext *s = &r->s;
|
|
GetBitContext *gb = &s->gb;
|
|
unsigned code = get_interleaved_ue_golomb(gb);
|
|
|
|
if (code > 11) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
|
|
return -1;
|
|
}
|
|
if(code > 5){
|
|
av_log(s->avctx, AV_LOG_ERROR, "dquant needed\n");
|
|
code -= 6;
|
|
}
|
|
if(s->pict_type != AV_PICTURE_TYPE_B)
|
|
return rv30_p_types[code];
|
|
else
|
|
return rv30_b_types[code];
|
|
}
|
|
|
|
static inline void rv30_weak_loop_filter(uint8_t *src, const int step,
|
|
const int stride, const int lim)
|
|
{
|
|
const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;
|
|
int i, diff;
|
|
|
|
for(i = 0; i < 4; i++){
|
|
diff = ((src[-2*step] - src[1*step]) - (src[-1*step] - src[0*step])*4) >> 3;
|
|
diff = av_clip(diff, -lim, lim);
|
|
src[-1*step] = cm[src[-1*step] + diff];
|
|
src[ 0*step] = cm[src[ 0*step] - diff];
|
|
src += stride;
|
|
}
|
|
}
|
|
|
|
static void rv30_loop_filter(RV34DecContext *r, int row)
|
|
{
|
|
MpegEncContext *s = &r->s;
|
|
int mb_pos, mb_x;
|
|
int i, j, k;
|
|
uint8_t *Y, *C;
|
|
int loc_lim, cur_lim, left_lim = 0, top_lim = 0;
|
|
|
|
mb_pos = row * s->mb_stride;
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
|
|
int mbtype = s->current_picture_ptr->mb_type[mb_pos];
|
|
if(IS_INTRA(mbtype) || IS_SEPARATE_DC(mbtype))
|
|
r->deblock_coefs[mb_pos] = 0xFFFF;
|
|
if(IS_INTRA(mbtype))
|
|
r->cbp_chroma[mb_pos] = 0xFF;
|
|
}
|
|
|
|
/* all vertical edges are filtered first
|
|
* and horizontal edges are filtered on the next iteration
|
|
*/
|
|
mb_pos = row * s->mb_stride;
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
|
|
cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
|
|
if(mb_x)
|
|
left_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - 1]];
|
|
for(j = 0; j < 16; j += 4){
|
|
Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize + 4 * !mb_x;
|
|
for(i = !mb_x; i < 4; i++, Y += 4){
|
|
int ij = i + j;
|
|
loc_lim = 0;
|
|
if(r->deblock_coefs[mb_pos] & (1 << ij))
|
|
loc_lim = cur_lim;
|
|
else if(!i && r->deblock_coefs[mb_pos - 1] & (1 << (ij + 3)))
|
|
loc_lim = left_lim;
|
|
else if( i && r->deblock_coefs[mb_pos] & (1 << (ij - 1)))
|
|
loc_lim = cur_lim;
|
|
if(loc_lim)
|
|
rv30_weak_loop_filter(Y, 1, s->linesize, loc_lim);
|
|
}
|
|
}
|
|
for(k = 0; k < 2; k++){
|
|
int cur_cbp, left_cbp = 0;
|
|
cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
|
|
if(mb_x)
|
|
left_cbp = (r->cbp_chroma[mb_pos - 1] >> (k*4)) & 0xF;
|
|
for(j = 0; j < 8; j += 4){
|
|
C = s->current_picture_ptr->f->data[k + 1] + mb_x*8 + (row*8 + j) * s->uvlinesize + 4 * !mb_x;
|
|
for(i = !mb_x; i < 2; i++, C += 4){
|
|
int ij = i + (j >> 1);
|
|
loc_lim = 0;
|
|
if (cur_cbp & (1 << ij))
|
|
loc_lim = cur_lim;
|
|
else if(!i && left_cbp & (1 << (ij + 1)))
|
|
loc_lim = left_lim;
|
|
else if( i && cur_cbp & (1 << (ij - 1)))
|
|
loc_lim = cur_lim;
|
|
if(loc_lim)
|
|
rv30_weak_loop_filter(C, 1, s->uvlinesize, loc_lim);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
mb_pos = row * s->mb_stride;
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++, mb_pos++){
|
|
cur_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos]];
|
|
if(row)
|
|
top_lim = rv30_loop_filt_lim[s->current_picture_ptr->qscale_table[mb_pos - s->mb_stride]];
|
|
for(j = 4*!row; j < 16; j += 4){
|
|
Y = s->current_picture_ptr->f->data[0] + mb_x*16 + (row*16 + j) * s->linesize;
|
|
for(i = 0; i < 4; i++, Y += 4){
|
|
int ij = i + j;
|
|
loc_lim = 0;
|
|
if(r->deblock_coefs[mb_pos] & (1 << ij))
|
|
loc_lim = cur_lim;
|
|
else if(!j && r->deblock_coefs[mb_pos - s->mb_stride] & (1 << (ij + 12)))
|
|
loc_lim = top_lim;
|
|
else if( j && r->deblock_coefs[mb_pos] & (1 << (ij - 4)))
|
|
loc_lim = cur_lim;
|
|
if(loc_lim)
|
|
rv30_weak_loop_filter(Y, s->linesize, 1, loc_lim);
|
|
}
|
|
}
|
|
for(k = 0; k < 2; k++){
|
|
int cur_cbp, top_cbp = 0;
|
|
cur_cbp = (r->cbp_chroma[mb_pos] >> (k*4)) & 0xF;
|
|
if(row)
|
|
top_cbp = (r->cbp_chroma[mb_pos - s->mb_stride] >> (k*4)) & 0xF;
|
|
for(j = 4*!row; j < 8; j += 4){
|
|
C = s->current_picture_ptr->f->data[k+1] + mb_x*8 + (row*8 + j) * s->uvlinesize;
|
|
for(i = 0; i < 2; i++, C += 4){
|
|
int ij = i + (j >> 1);
|
|
loc_lim = 0;
|
|
if (r->cbp_chroma[mb_pos] & (1 << ij))
|
|
loc_lim = cur_lim;
|
|
else if(!j && top_cbp & (1 << (ij + 2)))
|
|
loc_lim = top_lim;
|
|
else if( j && cur_cbp & (1 << (ij - 2)))
|
|
loc_lim = cur_lim;
|
|
if(loc_lim)
|
|
rv30_weak_loop_filter(C, s->uvlinesize, 1, loc_lim);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initialize decoder.
|
|
*/
|
|
static av_cold int rv30_decode_init(AVCodecContext *avctx)
|
|
{
|
|
RV34DecContext *r = avctx->priv_data;
|
|
int ret;
|
|
|
|
r->orig_width = avctx->coded_width;
|
|
r->orig_height = avctx->coded_height;
|
|
|
|
if (avctx->extradata_size < 2) {
|
|
av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
r->rv30 = 1;
|
|
if ((ret = ff_rv34_decode_init(avctx)) < 0)
|
|
return ret;
|
|
|
|
r->max_rpr = avctx->extradata[1] & 7;
|
|
if(avctx->extradata_size < 2*r->max_rpr + 8){
|
|
av_log(avctx, AV_LOG_WARNING, "Insufficient extradata - need at least %d bytes, got %d\n",
|
|
2*r->max_rpr + 8, avctx->extradata_size);
|
|
}
|
|
|
|
r->parse_slice_header = rv30_parse_slice_header;
|
|
r->decode_intra_types = rv30_decode_intra_types;
|
|
r->decode_mb_info = rv30_decode_mb_info;
|
|
r->loop_filter = rv30_loop_filter;
|
|
r->luma_dc_quant_i = rv30_luma_dc_quant;
|
|
r->luma_dc_quant_p = rv30_luma_dc_quant;
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_rv30_decoder = {
|
|
.name = "rv30",
|
|
.long_name = NULL_IF_CONFIG_SMALL("RealVideo 3.0"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_RV30,
|
|
.priv_data_size = sizeof(RV34DecContext),
|
|
.init = rv30_decode_init,
|
|
.close = ff_rv34_decode_end,
|
|
.decode = ff_rv34_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
|
|
AV_CODEC_CAP_FRAME_THREADS,
|
|
.flush = ff_mpeg_flush,
|
|
.pix_fmts = (const enum AVPixelFormat[]) {
|
|
AV_PIX_FMT_YUV420P,
|
|
AV_PIX_FMT_NONE
|
|
},
|
|
.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_rv34_decode_update_thread_context),
|
|
.caps_internal = FF_CODEC_CAP_ALLOCATE_PROGRESS,
|
|
};
|