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ffmpeg/libavcodec/rv34.c
Andreas Rheinhardt 49b4ed7237 avcodec/mpegvideo_dec: Always initialize IDCTDSPContext during init 
It has currently not been done for H263, H263P and MPEG4.
Doing so avoids having to initialize the IDCT permutation
lateron when decoding packets in order to be able to parse
a quant matrix; it means that every mpegvideo decoder always
has an initialized IDCTDSPContext after init.
Initializing is done generically in ff_mpv_decode_init().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-10-05 22:05:21 +02:00

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/*
* RV30/40 decoder common data
* Copyright (c) 2007 Mike Melanson, 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
* RV30/40 decoder common data
*/
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/mem_internal.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "decode.h"
#include "error_resilience.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodec.h"
#include "golomb.h"
#include "mathops.h"
#include "mpeg_er.h"
#include "qpeldsp.h"
#include "rectangle.h"
#include "thread.h"
#include "threadframe.h"
#include "rv34vlc.h"
#include "rv34data.h"
#include "rv34.h"
static inline void ZERO8x2(void* dst, int stride)
{
fill_rectangle(dst, 1, 2, stride, 0, 4);
fill_rectangle(((uint8_t*)(dst))+4, 1, 2, stride, 0, 4);
}
/** translation of RV30/40 macroblock types to lavc ones */
static const int rv34_mb_type_to_lavc[12] = {
MB_TYPE_INTRA,
MB_TYPE_INTRA16x16 | MB_TYPE_SEPARATE_DC,
MB_TYPE_16x16 | MB_TYPE_L0,
MB_TYPE_8x8 | MB_TYPE_L0,
MB_TYPE_16x16 | MB_TYPE_L0,
MB_TYPE_16x16 | MB_TYPE_L1,
MB_TYPE_SKIP,
MB_TYPE_DIRECT2 | MB_TYPE_16x16,
MB_TYPE_16x8 | MB_TYPE_L0,
MB_TYPE_8x16 | MB_TYPE_L0,
MB_TYPE_16x16 | MB_TYPE_L0L1,
MB_TYPE_16x16 | MB_TYPE_L0 | MB_TYPE_SEPARATE_DC
};
static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES];
static int rv34_decode_mv(RV34DecContext *r, int block_type);
/**
* @name RV30/40 VLC generating functions
* @{
*/
static VLCElem table_data[117592];
/**
* Generate VLC from codeword lengths.
* @param bits codeword lengths (zeroes are accepted)
* @param size length of input data
* @param vlc output VLC
* @param insyms symbols for input codes (NULL for default ones)
* @param num VLC table number (for static initialization)
*/
static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *syms,
int *offset)
{
int counts[17] = {0}, codes[17];
uint16_t cw[MAX_VLC_SIZE];
int maxbits;
for (int i = 0; i < size; i++)
counts[bits[i]]++;
/* bits[0] is zero for some tables, i.e. syms actually starts at 1.
* So we reset it here. The code assigned to this element is 0x00. */
codes[0] = counts[0] = 0;
for (int i = 0; i < 16; i++) {
codes[i+1] = (codes[i] + counts[i]) << 1;
if (counts[i])
maxbits = i;
}
for (int i = 0; i < size; i++)
cw[i] = codes[bits[i]]++;
vlc->table = &table_data[*offset];
vlc->table_allocated = FF_ARRAY_ELEMS(table_data) - *offset;
ff_vlc_init_sparse(vlc, FFMIN(maxbits, 9), size,
bits, 1, 1,
cw, 2, 2,
syms, !!syms, !!syms, VLC_INIT_STATIC_OVERLONG);
*offset += vlc->table_size;
}
/**
* Initialize all tables.
*/
static av_cold void rv34_init_tables(void)
{
int i, j, k, offset = 0;
for(i = 0; i < NUM_INTRA_TABLES; i++){
for(j = 0; j < 2; j++){
rv34_gen_vlc(rv34_table_intra_cbppat [i][j], CBPPAT_VLC_SIZE,
&intra_vlcs[i].cbppattern[j], NULL, &offset);
rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE,
&intra_vlcs[i].second_pattern[j], NULL, &offset);
rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE,
&intra_vlcs[i].third_pattern[j], NULL, &offset);
for(k = 0; k < 4; k++){
rv34_gen_vlc(rv34_table_intra_cbp[i][j+k*2], CBP_VLC_SIZE,
&intra_vlcs[i].cbp[j][k], rv34_cbp_code, &offset);
}
}
for(j = 0; j < 4; j++){
rv34_gen_vlc(rv34_table_intra_firstpat[i][j], FIRSTBLK_VLC_SIZE,
&intra_vlcs[i].first_pattern[j], NULL, &offset);
}
rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE,
&intra_vlcs[i].coefficient, NULL, &offset);
}
for(i = 0; i < NUM_INTER_TABLES; i++){
rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE,
&inter_vlcs[i].cbppattern[0], NULL, &offset);
for(j = 0; j < 4; j++){
rv34_gen_vlc(rv34_inter_cbp[i][j], CBP_VLC_SIZE,
&inter_vlcs[i].cbp[0][j], rv34_cbp_code, &offset);
}
for(j = 0; j < 2; j++){
rv34_gen_vlc(rv34_table_inter_firstpat [i][j], FIRSTBLK_VLC_SIZE,
&inter_vlcs[i].first_pattern[j], NULL, &offset);
rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE,
&inter_vlcs[i].second_pattern[j], NULL, &offset);
rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE,
&inter_vlcs[i].third_pattern[j], NULL, &offset);
}
rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE,
&inter_vlcs[i].coefficient, NULL, &offset);
}
}
/** @} */ // vlc group
/**
* @name RV30/40 4x4 block decoding functions
* @{
*/
/**
* Decode coded block pattern.
*/
static int rv34_decode_cbp(GetBitContext *gb, RV34VLC *vlc, int table)
{
int pattern, code, cbp=0;
int ones;
static const int cbp_masks[3] = {0x100000, 0x010000, 0x110000};
static const int shifts[4] = { 0, 2, 8, 10 };
const int *curshift = shifts;
int i, t, mask;
code = get_vlc2(gb, vlc->cbppattern[table].table, 9, 2);
pattern = code & 0xF;
code >>= 4;
ones = rv34_count_ones[pattern];
for(mask = 8; mask; mask >>= 1, curshift++){
if(pattern & mask)
cbp |= get_vlc2(gb, vlc->cbp[table][ones].table, vlc->cbp[table][ones].bits, 1) << curshift[0];
}
for(i = 0; i < 4; i++){
t = (modulo_three_table[code] >> (6 - 2*i)) & 3;
if(t == 1)
cbp |= cbp_masks[get_bits1(gb)] << i;
if(t == 2)
cbp |= cbp_masks[2] << i;
}
return cbp;
}
/**
* Get one coefficient value from the bitstream and store it.
*/
static inline void decode_coeff(int16_t *dst, int coef, int esc, GetBitContext *gb, VLC* vlc, int q)
{
if(coef){
if(coef == esc){
coef = get_vlc2(gb, vlc->table, 9, 2);
if(coef > 23){
coef -= 23;
coef = 22 + ((1 << coef) | get_bits(gb, coef));
}
coef += esc;
}
if(get_bits1(gb))
coef = -coef;
*dst = (coef*q + 8) >> 4;
}
}
/**
* Decode 2x2 subblock of coefficients.
*/
static inline void decode_subblock(int16_t *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
{
int flags = modulo_three_table[code];
decode_coeff( dst+0*4+0, (flags >> 6) , 3, gb, vlc, q);
if(is_block2){
decode_coeff(dst+1*4+0, (flags >> 4) & 3, 2, gb, vlc, q);
decode_coeff(dst+0*4+1, (flags >> 2) & 3, 2, gb, vlc, q);
}else{
decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q);
decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q);
}
decode_coeff( dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q);
}
/**
* Decode a single coefficient.
*/
static inline void decode_subblock1(int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q)
{
int coeff = modulo_three_table[code] >> 6;
decode_coeff(dst, coeff, 3, gb, vlc, q);
}
static inline void decode_subblock3(int16_t *dst, int code, GetBitContext *gb, VLC *vlc,
int q_dc, int q_ac1, int q_ac2)
{
int flags = modulo_three_table[code];
decode_coeff(dst+0*4+0, (flags >> 6) , 3, gb, vlc, q_dc);
decode_coeff(dst+0*4+1, (flags >> 4) & 3, 2, gb, vlc, q_ac1);
decode_coeff(dst+1*4+0, (flags >> 2) & 3, 2, gb, vlc, q_ac1);
decode_coeff(dst+1*4+1, (flags >> 0) & 3, 2, gb, vlc, q_ac2);
}
/**
* Decode coefficients for 4x4 block.
*
* This is done by filling 2x2 subblocks with decoded coefficients
* in this order (the same for subblocks and subblock coefficients):
* o--o
* /
* /
* o--o
*/
static int rv34_decode_block(int16_t *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc, int q_dc, int q_ac1, int q_ac2)
{
int code, pattern, has_ac = 1;
code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
pattern = code & 0x7;
code >>= 3;
if (modulo_three_table[code] & 0x3F) {
decode_subblock3(dst, code, gb, &rvlc->coefficient, q_dc, q_ac1, q_ac2);
} else {
decode_subblock1(dst, code, gb, &rvlc->coefficient, q_dc);
if (!pattern)
return 0;
has_ac = 0;
}
if(pattern & 4){
code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
decode_subblock(dst + 4*0+2, code, 0, gb, &rvlc->coefficient, q_ac2);
}
if(pattern & 2){ // Looks like coefficients 1 and 2 are swapped for this block
code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
decode_subblock(dst + 4*2+0, code, 1, gb, &rvlc->coefficient, q_ac2);
}
if(pattern & 1){
code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
decode_subblock(dst + 4*2+2, code, 0, gb, &rvlc->coefficient, q_ac2);
}
return has_ac | pattern;
}
/**
* @name RV30/40 bitstream parsing
* @{
*/
/**
* Decode starting slice position.
* @todo Maybe replace with ff_h263_decode_mba() ?
*/
int ff_rv34_get_start_offset(GetBitContext *gb, int mb_size)
{
int i;
for(i = 0; i < 5; i++)
if(rv34_mb_max_sizes[i] >= mb_size - 1)
break;
return rv34_mb_bits_sizes[i];
}
/**
* Select VLC set for decoding from current quantizer, modifier and frame type.
*/
static inline RV34VLC* choose_vlc_set(int quant, int mod, int type)
{
if(mod == 2 && quant < 19) quant += 10;
else if(mod && quant < 26) quant += 5;
av_assert2(quant >= 0 && quant < 32);
return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][quant]]
: &intra_vlcs[rv34_quant_to_vlc_set[0][quant]];
}
/**
* Decode intra macroblock header and return CBP in case of success, -1 otherwise.
*/
static int rv34_decode_intra_mb_header(RV34DecContext *r, int8_t *intra_types)
{
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int t;
r->is16 = get_bits1(gb);
if(r->is16){
s->current_picture_ptr->mb_type[mb_pos] = MB_TYPE_INTRA16x16;
r->block_type = RV34_MB_TYPE_INTRA16x16;
t = get_bits(gb, 2);
fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
r->luma_vlc = 2;
}else{
if(!r->rv30){
if(!get_bits1(gb))
av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
}
s->current_picture_ptr->mb_type[mb_pos] = MB_TYPE_INTRA;
r->block_type = RV34_MB_TYPE_INTRA;
if(r->decode_intra_types(r, gb, intra_types) < 0)
return -1;
r->luma_vlc = 1;
}
r->chroma_vlc = 0;
r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
}
/**
* Decode inter macroblock header and return CBP in case of success, -1 otherwise.
*/
static int rv34_decode_inter_mb_header(RV34DecContext *r, int8_t *intra_types)
{
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int i, t;
r->block_type = r->decode_mb_info(r);
if(r->block_type == -1)
return -1;
s->current_picture_ptr->mb_type[mb_pos] = rv34_mb_type_to_lavc[r->block_type];
r->mb_type[mb_pos] = r->block_type;
if(r->block_type == RV34_MB_SKIP){
if(s->pict_type == AV_PICTURE_TYPE_P)
r->mb_type[mb_pos] = RV34_MB_P_16x16;
if(s->pict_type == AV_PICTURE_TYPE_B)
r->mb_type[mb_pos] = RV34_MB_B_DIRECT;
}
r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
if (rv34_decode_mv(r, r->block_type) < 0)
return -1;
if(r->block_type == RV34_MB_SKIP){
fill_rectangle(intra_types, 4, 4, r->intra_types_stride, 0, sizeof(intra_types[0]));
return 0;
}
r->chroma_vlc = 1;
r->luma_vlc = 0;
if(IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
if(r->is16){
t = get_bits(gb, 2);
fill_rectangle(intra_types, 4, 4, r->intra_types_stride, t, sizeof(intra_types[0]));
r->luma_vlc = 2;
}else{
if(r->decode_intra_types(r, gb, intra_types) < 0)
return -1;
r->luma_vlc = 1;
}
r->chroma_vlc = 0;
r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
}else{
for(i = 0; i < 16; i++)
intra_types[(i & 3) + (i>>2) * r->intra_types_stride] = 0;
r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
if(r->mb_type[mb_pos] == RV34_MB_P_MIX16x16){
r->is16 = 1;
r->chroma_vlc = 1;
r->luma_vlc = 2;
r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 0);
}
}
return rv34_decode_cbp(gb, r->cur_vlcs, r->is16);
}
/** @} */ //bitstream functions
/**
* @name motion vector related code (prediction, reconstruction, motion compensation)
* @{
*/
/** macroblock partition width in 8x8 blocks */
static const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 };
/** macroblock partition height in 8x8 blocks */
static const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 };
/** availability index for subblocks */
static const uint8_t avail_indexes[4] = { 6, 7, 10, 11 };
/**
* motion vector prediction
*
* Motion prediction performed for the block by using median prediction of
* motion vectors from the left, top and right top blocks but in corner cases
* some other vectors may be used instead.
*/
static void rv34_pred_mv(RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
{
MpegEncContext *s = &r->s;
int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
int A[2] = {0}, B[2], C[2];
int i, j;
int mx, my;
int* avail = r->avail_cache + avail_indexes[subblock_no];
int c_off = part_sizes_w[block_type];
mv_pos += (subblock_no & 1) + (subblock_no >> 1)*s->b8_stride;
if(subblock_no == 3)
c_off = -1;
if(avail[-1]){
A[0] = s->current_picture_ptr->motion_val[0][mv_pos-1][0];
A[1] = s->current_picture_ptr->motion_val[0][mv_pos-1][1];
}
if(avail[-4]){
B[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][0];
B[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride][1];
}else{
B[0] = A[0];
B[1] = A[1];
}
if(!avail[c_off-4]){
if(avail[-4] && (avail[-1] || r->rv30)){
C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][0];
C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride-1][1];
}else{
C[0] = A[0];
C[1] = A[1];
}
}else{
C[0] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][0];
C[1] = s->current_picture_ptr->motion_val[0][mv_pos-s->b8_stride+c_off][1];
}
mx = mid_pred(A[0], B[0], C[0]);
my = mid_pred(A[1], B[1], C[1]);
mx += r->dmv[dmv_no][0];
my += r->dmv[dmv_no][1];
for(j = 0; j < part_sizes_h[block_type]; j++){
for(i = 0; i < part_sizes_w[block_type]; i++){
s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][0] = mx;
s->current_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][1] = my;
}
}
}
#define GET_PTS_DIFF(a, b) (((a) - (b) + 8192) & 0x1FFF)
/**
* Calculate motion vector component that should be added for direct blocks.
*/
static int calc_add_mv(RV34DecContext *r, int dir, int val)
{
int mul = dir ? -r->mv_weight2 : r->mv_weight1;
return (int)(val * (SUINT)mul + 0x2000) >> 14;
}
/**
* Predict motion vector for B-frame macroblock.
*/
static inline void rv34_pred_b_vector(int A[2], int B[2], int C[2],
int A_avail, int B_avail, int C_avail,
int *mx, int *my)
{
if(A_avail + B_avail + C_avail != 3){
*mx = A[0] + B[0] + C[0];
*my = A[1] + B[1] + C[1];
if(A_avail + B_avail + C_avail == 2){
*mx /= 2;
*my /= 2;
}
}else{
*mx = mid_pred(A[0], B[0], C[0]);
*my = mid_pred(A[1], B[1], C[1]);
}
}
/**
* motion vector prediction for B-frames
*/
static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
{
MpegEncContext *s = &r->s;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
int A[2] = { 0 }, B[2] = { 0 }, C[2] = { 0 };
int has_A = 0, has_B = 0, has_C = 0;
int mx, my;
int i, j;
Picture *cur_pic = s->current_picture_ptr;
const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0;
int type = cur_pic->mb_type[mb_pos];
if((r->avail_cache[6-1] & type) & mask){
A[0] = cur_pic->motion_val[dir][mv_pos - 1][0];
A[1] = cur_pic->motion_val[dir][mv_pos - 1][1];
has_A = 1;
}
if((r->avail_cache[6-4] & type) & mask){
B[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][0];
B[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride][1];
has_B = 1;
}
if(r->avail_cache[6-4] && (r->avail_cache[6-2] & type) & mask){
C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][0];
C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride + 2][1];
has_C = 1;
}else if((s->mb_x+1) == s->mb_width && (r->avail_cache[6-5] & type) & mask){
C[0] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][0];
C[1] = cur_pic->motion_val[dir][mv_pos - s->b8_stride - 1][1];
has_C = 1;
}
rv34_pred_b_vector(A, B, C, has_A, has_B, has_C, &mx, &my);
mx += r->dmv[dir][0];
my += r->dmv[dir][1];
for(j = 0; j < 2; j++){
for(i = 0; i < 2; i++){
cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][0] = mx;
cur_pic->motion_val[dir][mv_pos + i + j*s->b8_stride][1] = my;
}
}
if(block_type == RV34_MB_B_BACKWARD || block_type == RV34_MB_B_FORWARD){
ZERO8x2(cur_pic->motion_val[!dir][mv_pos], s->b8_stride);
}
}
/**
* motion vector prediction - RV3 version
*/
static void rv34_pred_mv_rv3(RV34DecContext *r, int block_type, int dir)
{
MpegEncContext *s = &r->s;
int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
int A[2] = {0}, B[2], C[2];
int i, j, k;
int mx, my;
int* avail = r->avail_cache + avail_indexes[0];
if(avail[-1]){
A[0] = s->current_picture_ptr->motion_val[0][mv_pos - 1][0];
A[1] = s->current_picture_ptr->motion_val[0][mv_pos - 1][1];
}
if(avail[-4]){
B[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][0];
B[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride][1];
}else{
B[0] = A[0];
B[1] = A[1];
}
if(!avail[-4 + 2]){
if(avail[-4] && (avail[-1])){
C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][0];
C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride - 1][1];
}else{
C[0] = A[0];
C[1] = A[1];
}
}else{
C[0] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][0];
C[1] = s->current_picture_ptr->motion_val[0][mv_pos - s->b8_stride + 2][1];
}
mx = mid_pred(A[0], B[0], C[0]);
my = mid_pred(A[1], B[1], C[1]);
mx += r->dmv[0][0];
my += r->dmv[0][1];
for(j = 0; j < 2; j++){
for(i = 0; i < 2; i++){
for(k = 0; k < 2; k++){
s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][0] = mx;
s->current_picture_ptr->motion_val[k][mv_pos + i + j*s->b8_stride][1] = my;
}
}
}
}
static const int chroma_coeffs[3] = { 0, 3, 5 };
/**
* generic motion compensation function
*
* @param r decoder context
* @param block_type type of the current block
* @param xoff horizontal offset from the start of the current block
* @param yoff vertical offset from the start of the current block
* @param mv_off offset to the motion vector information
* @param width width of the current partition in 8x8 blocks
* @param height height of the current partition in 8x8 blocks
* @param dir motion compensation direction (i.e. from the last or the next reference frame)
* @param thirdpel motion vectors are specified in 1/3 of pixel
* @param qpel_mc a set of functions used to perform luma motion compensation
* @param chroma_mc a set of functions used to perform chroma motion compensation
*/
static inline void rv34_mc(RV34DecContext *r, const int block_type,
const int xoff, const int yoff, int mv_off,
const int width, const int height, int dir,
const int thirdpel, int weighted,
qpel_mc_func (*qpel_mc)[16],
h264_chroma_mc_func (*chroma_mc))
{
MpegEncContext *s = &r->s;
uint8_t *Y, *U, *V, *srcY, *srcU, *srcV;
int dxy, mx, my, umx, umy, lx, ly, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride + mv_off;
int is16x16 = 1;
int emu = 0;
if(thirdpel){
int chroma_mx, chroma_my;
mx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) / 3 - (1 << 24);
my = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) / 3 - (1 << 24);
lx = (s->current_picture_ptr->motion_val[dir][mv_pos][0] + (3 << 24)) % 3;
ly = (s->current_picture_ptr->motion_val[dir][mv_pos][1] + (3 << 24)) % 3;
chroma_mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
chroma_my = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
umx = (chroma_mx + (3 << 24)) / 3 - (1 << 24);
umy = (chroma_my + (3 << 24)) / 3 - (1 << 24);
uvmx = chroma_coeffs[(chroma_mx + (3 << 24)) % 3];
uvmy = chroma_coeffs[(chroma_my + (3 << 24)) % 3];
}else{
int cx, cy;
mx = s->current_picture_ptr->motion_val[dir][mv_pos][0] >> 2;
my = s->current_picture_ptr->motion_val[dir][mv_pos][1] >> 2;
lx = s->current_picture_ptr->motion_val[dir][mv_pos][0] & 3;
ly = s->current_picture_ptr->motion_val[dir][mv_pos][1] & 3;
cx = s->current_picture_ptr->motion_val[dir][mv_pos][0] / 2;
cy = s->current_picture_ptr->motion_val[dir][mv_pos][1] / 2;
umx = cx >> 2;
umy = cy >> 2;
uvmx = (cx & 3) << 1;
uvmy = (cy & 3) << 1;
//due to some flaw RV40 uses the same MC compensation routine for H2V2 and H3V3
if(uvmx == 6 && uvmy == 6)
uvmx = uvmy = 4;
}
if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME)) {
/* wait for the referenced mb row to be finished */
int mb_row = s->mb_y + ((yoff + my + 5 + 8 * height) >> 4);
const ThreadFrame *f = dir ? &s->next_picture_ptr->tf : &s->last_picture_ptr->tf;
ff_thread_await_progress(f, mb_row, 0);
}
dxy = ly*4 + lx;
srcY = dir ? s->next_picture_ptr->f->data[0] : s->last_picture_ptr->f->data[0];
srcU = dir ? s->next_picture_ptr->f->data[1] : s->last_picture_ptr->f->data[1];
srcV = dir ? s->next_picture_ptr->f->data[2] : s->last_picture_ptr->f->data[2];
src_x = s->mb_x * 16 + xoff + mx;
src_y = s->mb_y * 16 + yoff + my;
uvsrc_x = s->mb_x * 8 + (xoff >> 1) + umx;
uvsrc_y = s->mb_y * 8 + (yoff >> 1) + umy;
srcY += src_y * s->linesize + src_x;
srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
if(s->h_edge_pos - (width << 3) < 6 || s->v_edge_pos - (height << 3) < 6 ||
(unsigned)(src_x - !!lx*2) > s->h_edge_pos - !!lx*2 - (width <<3) - 4 ||
(unsigned)(src_y - !!ly*2) > s->v_edge_pos - !!ly*2 - (height<<3) - 4) {
srcY -= 2 + 2*s->linesize;
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, srcY,
s->linesize, s->linesize,
(width << 3) + 6, (height << 3) + 6,
src_x - 2, src_y - 2,
s->h_edge_pos, s->v_edge_pos);
srcY = s->sc.edge_emu_buffer + 2 + 2*s->linesize;
emu = 1;
}
if(!weighted){
Y = s->dest[0] + xoff + yoff *s->linesize;
U = s->dest[1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
V = s->dest[2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
}else{
Y = r->tmp_b_block_y [dir] + xoff + yoff *s->linesize;
U = r->tmp_b_block_uv[dir*2] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
V = r->tmp_b_block_uv[dir*2+1] + (xoff>>1) + (yoff>>1)*s->uvlinesize;
}
if(block_type == RV34_MB_P_16x8){
qpel_mc[1][dxy](Y, srcY, s->linesize);
Y += 8;
srcY += 8;
}else if(block_type == RV34_MB_P_8x16){
qpel_mc[1][dxy](Y, srcY, s->linesize);
Y += 8 * s->linesize;
srcY += 8 * s->linesize;
}
is16x16 = (block_type != RV34_MB_P_8x8) && (block_type != RV34_MB_P_16x8) && (block_type != RV34_MB_P_8x16);
qpel_mc[!is16x16][dxy](Y, srcY, s->linesize);
if (emu) {
uint8_t *uvbuf = s->sc.edge_emu_buffer;
s->vdsp.emulated_edge_mc(uvbuf, srcU,
s->uvlinesize, s->uvlinesize,
(width << 2) + 1, (height << 2) + 1,
uvsrc_x, uvsrc_y,
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
srcU = uvbuf;
uvbuf += 9*s->uvlinesize;
s->vdsp.emulated_edge_mc(uvbuf, srcV,
s->uvlinesize, s->uvlinesize,
(width << 2) + 1, (height << 2) + 1,
uvsrc_x, uvsrc_y,
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
srcV = uvbuf;
}
chroma_mc[2-width] (U, srcU, s->uvlinesize, height*4, uvmx, uvmy);
chroma_mc[2-width] (V, srcV, s->uvlinesize, height*4, uvmx, uvmy);
}
static void rv34_mc_1mv(RV34DecContext *r, const int block_type,
const int xoff, const int yoff, int mv_off,
const int width, const int height, int dir)
{
rv34_mc(r, block_type, xoff, yoff, mv_off, width, height, dir, r->rv30, 0,
r->rdsp.put_pixels_tab,
r->rdsp.put_chroma_pixels_tab);
}
static void rv4_weight(RV34DecContext *r)
{
r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][0](r->s.dest[0],
r->tmp_b_block_y[0],
r->tmp_b_block_y[1],
r->weight1,
r->weight2,
r->s.linesize);
r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[1],
r->tmp_b_block_uv[0],
r->tmp_b_block_uv[2],
r->weight1,
r->weight2,
r->s.uvlinesize);
r->rdsp.rv40_weight_pixels_tab[r->scaled_weight][1](r->s.dest[2],
r->tmp_b_block_uv[1],
r->tmp_b_block_uv[3],
r->weight1,
r->weight2,
r->s.uvlinesize);
}
static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
{
int weighted = !r->rv30 && block_type != RV34_MB_B_BIDIR && r->weight1 != 8192;
rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30, weighted,
r->rdsp.put_pixels_tab,
r->rdsp.put_chroma_pixels_tab);
if(!weighted){
rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 0,
r->rdsp.avg_pixels_tab,
r->rdsp.avg_chroma_pixels_tab);
}else{
rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30, 1,
r->rdsp.put_pixels_tab,
r->rdsp.put_chroma_pixels_tab);
rv4_weight(r);
}
}
static void rv34_mc_2mv_skip(RV34DecContext *r)
{
int i, j;
int weighted = !r->rv30 && r->weight1 != 8192;
for(j = 0; j < 2; j++)
for(i = 0; i < 2; i++){
rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 0, r->rv30,
weighted,
r->rdsp.put_pixels_tab,
r->rdsp.put_chroma_pixels_tab);
rv34_mc(r, RV34_MB_P_8x8, i*8, j*8, i+j*r->s.b8_stride, 1, 1, 1, r->rv30,
weighted,
weighted ? r->rdsp.put_pixels_tab : r->rdsp.avg_pixels_tab,
weighted ? r->rdsp.put_chroma_pixels_tab : r->rdsp.avg_chroma_pixels_tab);
}
if(weighted)
rv4_weight(r);
}
/** number of motion vectors in each macroblock type */
static const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 };
/**
* Decode motion vector differences
* and perform motion vector reconstruction and motion compensation.
*/
static int rv34_decode_mv(RV34DecContext *r, int block_type)
{
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int i, j, k, l;
int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
int next_bt;
memset(r->dmv, 0, sizeof(r->dmv));
for(i = 0; i < num_mvs[block_type]; i++){
r->dmv[i][0] = get_interleaved_se_golomb(gb);
r->dmv[i][1] = get_interleaved_se_golomb(gb);
if (r->dmv[i][0] == INVALID_VLC ||
r->dmv[i][1] == INVALID_VLC) {
r->dmv[i][0] = r->dmv[i][1] = 0;
return AVERROR_INVALIDDATA;
}
}
switch(block_type){
case RV34_MB_TYPE_INTRA:
case RV34_MB_TYPE_INTRA16x16:
ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
return 0;
case RV34_MB_SKIP:
if(s->pict_type == AV_PICTURE_TYPE_P){
ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
break;
}
case RV34_MB_B_DIRECT:
//surprisingly, it uses motion scheme from next reference frame
/* wait for the current mb row to be finished */
if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
ff_thread_await_progress(&s->next_picture_ptr->tf, FFMAX(0, s->mb_y-1), 0);
next_bt = s->next_picture_ptr->mb_type[s->mb_x + s->mb_y * s->mb_stride];
if(IS_INTRA(next_bt) || IS_SKIP(next_bt)){
ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
ZERO8x2(s->current_picture_ptr->motion_val[1][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
}else
for(j = 0; j < 2; j++)
for(i = 0; i < 2; i++)
for(k = 0; k < 2; k++)
for(l = 0; l < 2; l++)
s->current_picture_ptr->motion_val[l][mv_pos + i + j*s->b8_stride][k] = calc_add_mv(r, l, s->next_picture_ptr->motion_val[0][mv_pos + i + j*s->b8_stride][k]);
if(!(IS_16X8(next_bt) || IS_8X16(next_bt) || IS_8X8(next_bt))) //we can use whole macroblock MC
rv34_mc_2mv(r, block_type);
else
rv34_mc_2mv_skip(r);
ZERO8x2(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], s->b8_stride);
break;
case RV34_MB_P_16x16:
case RV34_MB_P_MIX16x16:
rv34_pred_mv(r, block_type, 0, 0);
rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
break;
case RV34_MB_B_FORWARD:
case RV34_MB_B_BACKWARD:
r->dmv[1][0] = r->dmv[0][0];
r->dmv[1][1] = r->dmv[0][1];
if(r->rv30)
rv34_pred_mv_rv3(r, block_type, block_type == RV34_MB_B_BACKWARD);
else
rv34_pred_mv_b (r, block_type, block_type == RV34_MB_B_BACKWARD);
rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, block_type == RV34_MB_B_BACKWARD);
break;
case RV34_MB_P_16x8:
case RV34_MB_P_8x16:
rv34_pred_mv(r, block_type, 0, 0);
rv34_pred_mv(r, block_type, 1 + (block_type == RV34_MB_P_16x8), 1);
if(block_type == RV34_MB_P_16x8){
rv34_mc_1mv(r, block_type, 0, 0, 0, 2, 1, 0);
rv34_mc_1mv(r, block_type, 0, 8, s->b8_stride, 2, 1, 0);
}
if(block_type == RV34_MB_P_8x16){
rv34_mc_1mv(r, block_type, 0, 0, 0, 1, 2, 0);
rv34_mc_1mv(r, block_type, 8, 0, 1, 1, 2, 0);
}
break;
case RV34_MB_B_BIDIR:
rv34_pred_mv_b (r, block_type, 0);
rv34_pred_mv_b (r, block_type, 1);
rv34_mc_2mv (r, block_type);
break;
case RV34_MB_P_8x8:
for(i=0;i< 4;i++){
rv34_pred_mv(r, block_type, i, i);
rv34_mc_1mv (r, block_type, (i&1)<<3, (i&2)<<2, (i&1)+(i>>1)*s->b8_stride, 1, 1, 0);
}
break;
}
return 0;
}
/** @} */ // mv group
/**
* @name Macroblock reconstruction functions
* @{
*/
/** mapping of RV30/40 intra prediction types to standard H.264 types */
static const int ittrans[9] = {
DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
};
/** mapping of RV30/40 intra 16x16 prediction types to standard H.264 types */
static const int ittrans16[4] = {
DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
};
/**
* Perform 4x4 intra prediction.
*/
static void rv34_pred_4x4_block(RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
{
uint8_t *prev = dst - stride + 4;
uint32_t topleft;
if(!up && !left)
itype = DC_128_PRED;
else if(!up){
if(itype == VERT_PRED) itype = HOR_PRED;
if(itype == DC_PRED) itype = LEFT_DC_PRED;
}else if(!left){
if(itype == HOR_PRED) itype = VERT_PRED;
if(itype == DC_PRED) itype = TOP_DC_PRED;
if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
}
if(!down){
if(itype == DIAG_DOWN_LEFT_PRED) itype = DIAG_DOWN_LEFT_PRED_RV40_NODOWN;
if(itype == HOR_UP_PRED) itype = HOR_UP_PRED_RV40_NODOWN;
if(itype == VERT_LEFT_PRED) itype = VERT_LEFT_PRED_RV40_NODOWN;
}
if(!right && up){
topleft = dst[-stride + 3] * 0x01010101u;
prev = (uint8_t*)&topleft;
}
r->h.pred4x4[itype](dst, prev, stride);
}
static inline int adjust_pred16(int itype, int up, int left)
{
if(!up && !left)
itype = DC_128_PRED8x8;
else if(!up){
if(itype == PLANE_PRED8x8)itype = HOR_PRED8x8;
if(itype == VERT_PRED8x8) itype = HOR_PRED8x8;
if(itype == DC_PRED8x8) itype = LEFT_DC_PRED8x8;
}else if(!left){
if(itype == PLANE_PRED8x8)itype = VERT_PRED8x8;
if(itype == HOR_PRED8x8) itype = VERT_PRED8x8;
if(itype == DC_PRED8x8) itype = TOP_DC_PRED8x8;
}
return itype;
}
static inline void rv34_process_block(RV34DecContext *r,
uint8_t *pdst, int stride,
int fc, int sc, int q_dc, int q_ac)
{
MpegEncContext *s = &r->s;
int16_t *ptr = s->block[0];
int has_ac = rv34_decode_block(ptr, &s->gb, r->cur_vlcs,
fc, sc, q_dc, q_ac, q_ac);
if(has_ac){
r->rdsp.rv34_idct_add(pdst, stride, ptr);
}else{
r->rdsp.rv34_idct_dc_add(pdst, stride, ptr[0]);
ptr[0] = 0;
}
}
static void rv34_output_i16x16(RV34DecContext *r, int8_t *intra_types, int cbp)
{
LOCAL_ALIGNED_16(int16_t, block16, [16]);
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int q_dc = rv34_qscale_tab[ r->luma_dc_quant_i[s->qscale] ],
q_ac = rv34_qscale_tab[s->qscale];
uint8_t *dst = s->dest[0];
int16_t *ptr = s->block[0];
int i, j, itype, has_ac;
memset(block16, 0, 16 * sizeof(*block16));
has_ac = rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac);
if(has_ac)
r->rdsp.rv34_inv_transform(block16);
else
r->rdsp.rv34_inv_transform_dc(block16);
itype = ittrans16[intra_types[0]];
itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
r->h.pred16x16[itype](dst, s->linesize);
for(j = 0; j < 4; j++){
for(i = 0; i < 4; i++, cbp >>= 1){
int dc = block16[i + j*4];
if(cbp & 1){
has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
}else
has_ac = 0;
if(has_ac){
ptr[0] = dc;
r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
}else
r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
}
dst += 4*s->linesize;
}
itype = ittrans16[intra_types[0]];
if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
itype = adjust_pred16(itype, r->avail_cache[6-4], r->avail_cache[6-1]);
q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
for(j = 1; j < 3; j++){
dst = s->dest[j];
r->h.pred8x8[itype](dst, s->uvlinesize);
for(i = 0; i < 4; i++, cbp >>= 1){
uint8_t *pdst;
if(!(cbp & 1)) continue;
pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
rv34_process_block(r, pdst, s->uvlinesize,
r->chroma_vlc, 1, q_dc, q_ac);
}
}
}
static void rv34_output_intra(RV34DecContext *r, int8_t *intra_types, int cbp)
{
MpegEncContext *s = &r->s;
uint8_t *dst = s->dest[0];
int avail[6*8] = {0};
int i, j, k;
int idx, q_ac, q_dc;
// Set neighbour information.
if(r->avail_cache[1])
avail[0] = 1;
if(r->avail_cache[2])
avail[1] = avail[2] = 1;
if(r->avail_cache[3])
avail[3] = avail[4] = 1;
if(r->avail_cache[4])
avail[5] = 1;
if(r->avail_cache[5])
avail[8] = avail[16] = 1;
if(r->avail_cache[9])
avail[24] = avail[32] = 1;
q_ac = rv34_qscale_tab[s->qscale];
for(j = 0; j < 4; j++){
idx = 9 + j*8;
for(i = 0; i < 4; i++, cbp >>= 1, dst += 4, idx++){
rv34_pred_4x4_block(r, dst, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
avail[idx] = 1;
if(!(cbp & 1)) continue;
rv34_process_block(r, dst, s->linesize,
r->luma_vlc, 0, q_ac, q_ac);
}
dst += s->linesize * 4 - 4*4;
intra_types += r->intra_types_stride;
}
intra_types -= r->intra_types_stride * 4;
q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
for(k = 0; k < 2; k++){
dst = s->dest[1+k];
fill_rectangle(r->avail_cache + 6, 2, 2, 4, 0, 4);
for(j = 0; j < 2; j++){
int* acache = r->avail_cache + 6 + j*4;
for(i = 0; i < 2; i++, cbp >>= 1, acache++){
int itype = ittrans[intra_types[i*2+j*2*r->intra_types_stride]];
rv34_pred_4x4_block(r, dst+4*i, s->uvlinesize, itype, acache[-4], acache[-1], !i && !j, acache[-3]);
acache[0] = 1;
if(!(cbp&1)) continue;
rv34_process_block(r, dst + 4*i, s->uvlinesize,
r->chroma_vlc, 1, q_dc, q_ac);
}
dst += 4*s->uvlinesize;
}
}
}
static int is_mv_diff_gt_3(int16_t (*motion_val)[2], int step)
{
int d;
d = motion_val[0][0] - motion_val[-step][0];
if(d < -3 || d > 3)
return 1;
d = motion_val[0][1] - motion_val[-step][1];
if(d < -3 || d > 3)
return 1;
return 0;
}
static int rv34_set_deblock_coef(RV34DecContext *r)
{
MpegEncContext *s = &r->s;
int hmvmask = 0, vmvmask = 0, i, j;
int midx = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
int16_t (*motion_val)[2] = &s->current_picture_ptr->motion_val[0][midx];
for(j = 0; j < 16; j += 8){
for(i = 0; i < 2; i++){
if(is_mv_diff_gt_3(motion_val + i, 1))
vmvmask |= 0x11 << (j + i*2);
if((j || s->mb_y) && is_mv_diff_gt_3(motion_val + i, s->b8_stride))
hmvmask |= 0x03 << (j + i*2);
}
motion_val += s->b8_stride;
}
if(s->first_slice_line)
hmvmask &= ~0x000F;
if(!s->mb_x)
vmvmask &= ~0x1111;
if(r->rv30){ //RV30 marks both subblocks on the edge for filtering
vmvmask |= (vmvmask & 0x4444) >> 1;
hmvmask |= (hmvmask & 0x0F00) >> 4;
if(s->mb_x)
r->deblock_coefs[s->mb_x - 1 + s->mb_y*s->mb_stride] |= (vmvmask & 0x1111) << 3;
if(!s->first_slice_line)
r->deblock_coefs[s->mb_x + (s->mb_y - 1)*s->mb_stride] |= (hmvmask & 0xF) << 12;
}
return hmvmask | vmvmask;
}
static int rv34_decode_inter_macroblock(RV34DecContext *r, int8_t *intra_types)
{
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
uint8_t *dst = s->dest[0];
int16_t *ptr = s->block[0];
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp, cbp2;
int q_dc, q_ac, has_ac;
int i, j;
int dist;
// Calculate which neighbours are available. Maybe it's worth optimizing too.
memset(r->avail_cache, 0, sizeof(r->avail_cache));
fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
if(s->mb_x && dist)
r->avail_cache[5] =
r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
if(dist >= s->mb_width)
r->avail_cache[2] =
r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
if(s->mb_x && dist > s->mb_width)
r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
s->qscale = r->si.quant;
cbp = cbp2 = rv34_decode_inter_mb_header(r, intra_types);
r->cbp_luma [mb_pos] = cbp;
r->cbp_chroma[mb_pos] = cbp >> 16;
r->deblock_coefs[mb_pos] = rv34_set_deblock_coef(r) | r->cbp_luma[mb_pos];
s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
if(cbp == -1)
return -1;
if (IS_INTRA(s->current_picture_ptr->mb_type[mb_pos])){
if(r->is16) rv34_output_i16x16(r, intra_types, cbp);
else rv34_output_intra(r, intra_types, cbp);
return 0;
}
if(r->is16){
// Only for RV34_MB_P_MIX16x16
LOCAL_ALIGNED_16(int16_t, block16, [16]);
memset(block16, 0, 16 * sizeof(*block16));
q_dc = rv34_qscale_tab[ r->luma_dc_quant_p[s->qscale] ];
q_ac = rv34_qscale_tab[s->qscale];
if (rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0, q_dc, q_dc, q_ac))
r->rdsp.rv34_inv_transform(block16);
else
r->rdsp.rv34_inv_transform_dc(block16);
q_ac = rv34_qscale_tab[s->qscale];
for(j = 0; j < 4; j++){
for(i = 0; i < 4; i++, cbp >>= 1){
int dc = block16[i + j*4];
if(cbp & 1){
has_ac = rv34_decode_block(ptr, gb, r->cur_vlcs, r->luma_vlc, 0, q_ac, q_ac, q_ac);
}else
has_ac = 0;
if(has_ac){
ptr[0] = dc;
r->rdsp.rv34_idct_add(dst+4*i, s->linesize, ptr);
}else
r->rdsp.rv34_idct_dc_add(dst+4*i, s->linesize, dc);
}
dst += 4*s->linesize;
}
r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
}else{
q_ac = rv34_qscale_tab[s->qscale];
for(j = 0; j < 4; j++){
for(i = 0; i < 4; i++, cbp >>= 1){
if(!(cbp & 1)) continue;
rv34_process_block(r, dst + 4*i, s->linesize,
r->luma_vlc, 0, q_ac, q_ac);
}
dst += 4*s->linesize;
}
}
q_dc = rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]];
q_ac = rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]];
for(j = 1; j < 3; j++){
dst = s->dest[j];
for(i = 0; i < 4; i++, cbp >>= 1){
uint8_t *pdst;
if(!(cbp & 1)) continue;
pdst = dst + (i&1)*4 + (i&2)*2*s->uvlinesize;
rv34_process_block(r, pdst, s->uvlinesize,
r->chroma_vlc, 1, q_dc, q_ac);
}
}
return 0;
}
static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
{
MpegEncContext *s = &r->s;
int cbp, dist;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
// Calculate which neighbours are available. Maybe it's worth optimizing too.
memset(r->avail_cache, 0, sizeof(r->avail_cache));
fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
if(s->mb_x && dist)
r->avail_cache[5] =
r->avail_cache[9] = s->current_picture_ptr->mb_type[mb_pos - 1];
if(dist >= s->mb_width)
r->avail_cache[2] =
r->avail_cache[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride];
if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
r->avail_cache[4] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
if(s->mb_x && dist > s->mb_width)
r->avail_cache[1] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
s->qscale = r->si.quant;
cbp = rv34_decode_intra_mb_header(r, intra_types);
r->cbp_luma [mb_pos] = cbp;
r->cbp_chroma[mb_pos] = cbp >> 16;
r->deblock_coefs[mb_pos] = 0xFFFF;
s->current_picture_ptr->qscale_table[mb_pos] = s->qscale;
if(cbp == -1)
return -1;
if(r->is16){
rv34_output_i16x16(r, intra_types, cbp);
return 0;
}
rv34_output_intra(r, intra_types, cbp);
return 0;
}
static int check_slice_end(RV34DecContext *r, MpegEncContext *s)
{
int bits;
if(s->mb_y >= s->mb_height)
return 1;
if(!s->mb_num_left)
return 1;
if(r->s.mb_skip_run > 1)
return 0;
bits = get_bits_left(&s->gb);
if(bits <= 0 || (bits < 8 && !show_bits(&s->gb, bits)))
return 1;
return 0;
}
static void rv34_decoder_free(RV34DecContext *r)
{
av_freep(&r->intra_types_hist);
r->intra_types = NULL;
av_freep(&r->tmp_b_block_base);
av_freep(&r->mb_type);
av_freep(&r->cbp_luma);
av_freep(&r->cbp_chroma);
av_freep(&r->deblock_coefs);
}
static int rv34_decoder_alloc(RV34DecContext *r)
{
r->intra_types_stride = r->s.mb_width * 4 + 4;
r->cbp_chroma = av_mallocz(r->s.mb_stride * r->s.mb_height *
sizeof(*r->cbp_chroma));
r->cbp_luma = av_mallocz(r->s.mb_stride * r->s.mb_height *
sizeof(*r->cbp_luma));
r->deblock_coefs = av_mallocz(r->s.mb_stride * r->s.mb_height *
sizeof(*r->deblock_coefs));
r->intra_types_hist = av_malloc(r->intra_types_stride * 4 * 2 *
sizeof(*r->intra_types_hist));
r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height *
sizeof(*r->mb_type));
if (!(r->cbp_chroma && r->cbp_luma && r->deblock_coefs &&
r->intra_types_hist && r->mb_type)) {
r->s.context_reinit = 1;
rv34_decoder_free(r);
return AVERROR(ENOMEM);
}
r->intra_types = r->intra_types_hist + r->intra_types_stride * 4;
return 0;
}
static int rv34_decoder_realloc(RV34DecContext *r)
{
rv34_decoder_free(r);
return rv34_decoder_alloc(r);
}
static int rv34_decode_slice(RV34DecContext *r, int end, const uint8_t* buf, int buf_size)
{
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int mb_pos, slice_type;
int res;
init_get_bits(&r->s.gb, buf, buf_size*8);
res = r->parse_slice_header(r, gb, &r->si);
if(res < 0){
av_log(s->avctx, AV_LOG_ERROR, "Incorrect or unknown slice header\n");
return -1;
}
slice_type = r->si.type ? r->si.type : AV_PICTURE_TYPE_I;
if (slice_type != s->pict_type) {
av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
return AVERROR_INVALIDDATA;
}
if (s->width != r->si.width || s->height != r->si.height) {
av_log(s->avctx, AV_LOG_ERROR, "Size mismatch\n");
return AVERROR_INVALIDDATA;
}
r->si.end = end;
s->qscale = r->si.quant;
s->mb_num_left = r->si.end - r->si.start;
r->s.mb_skip_run = 0;
mb_pos = s->mb_x + s->mb_y * s->mb_width;
if(r->si.start != mb_pos){
av_log(s->avctx, AV_LOG_ERROR, "Slice indicates MB offset %d, got %d\n", r->si.start, mb_pos);
s->mb_x = r->si.start % s->mb_width;
s->mb_y = r->si.start / s->mb_width;
}
memset(r->intra_types_hist, -1, r->intra_types_stride * 4 * 2 * sizeof(*r->intra_types_hist));
s->first_slice_line = 1;
s->resync_mb_x = s->mb_x;
s->resync_mb_y = s->mb_y;
ff_init_block_index(s);
while(!check_slice_end(r, s)) {
ff_update_block_index(s, 8, 0, 1);
if(r->si.type)
res = rv34_decode_inter_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
else
res = rv34_decode_intra_macroblock(r, r->intra_types + s->mb_x * 4 + 4);
if(res < 0){
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_ERROR);
return -1;
}
if (++s->mb_x == s->mb_width) {
s->mb_x = 0;
s->mb_y++;
ff_init_block_index(s);
memmove(r->intra_types_hist, r->intra_types, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
memset(r->intra_types, -1, r->intra_types_stride * 4 * sizeof(*r->intra_types_hist));
if(r->loop_filter && s->mb_y >= 2)
r->loop_filter(r, s->mb_y - 2);
if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
ff_thread_report_progress(&s->current_picture_ptr->tf,
s->mb_y - 2, 0);
}
if(s->mb_x == s->resync_mb_x)
s->first_slice_line=0;
s->mb_num_left--;
}
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_MB_END);
return s->mb_y == s->mb_height;
}
/** @} */ // reconstruction group end
/**
* Initialize decoder.
*/
av_cold int ff_rv34_decode_init(AVCodecContext *avctx)
{
static AVOnce init_static_once = AV_ONCE_INIT;
RV34DecContext *r = avctx->priv_data;
MpegEncContext *s = &r->s;
int ret;
ff_mpv_decode_init(s, avctx);
s->out_format = FMT_H263;
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
avctx->has_b_frames = 1;
s->low_delay = 0;
if ((ret = ff_mpv_common_init(s)) < 0)
return ret;
ff_h264_pred_init(&r->h, AV_CODEC_ID_RV40, 8, 1);
if ((ret = rv34_decoder_alloc(r)) < 0) {
ff_mpv_common_end(&r->s);
return ret;
}
ff_thread_once(&init_static_once, rv34_init_tables);
return 0;
}
int ff_rv34_decode_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
{
RV34DecContext *r = dst->priv_data, *r1 = src->priv_data;
MpegEncContext * const s = &r->s, * const s1 = &r1->s;
int err;
if (dst == src || !s1->context_initialized)
return 0;
if (s->height != s1->height || s->width != s1->width || s->context_reinit) {
s->height = s1->height;
s->width = s1->width;
if ((err = ff_mpv_common_frame_size_change(s)) < 0)
return err;
if ((err = rv34_decoder_realloc(r)) < 0)
return err;
}
r->cur_pts = r1->cur_pts;
r->last_pts = r1->last_pts;
r->next_pts = r1->next_pts;
memset(&r->si, 0, sizeof(r->si));
// Do no call ff_mpeg_update_thread_context on a partially initialized
// decoder context.
if (!s1->context_initialized)
return 0;
return ff_mpeg_update_thread_context(dst, src);
}
static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n, int slice_count, int buf_size)
{
if (n < slice_count) {
return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
} else
return buf_size;
}
static int finish_frame(AVCodecContext *avctx, AVFrame *pict)
{
RV34DecContext *r = avctx->priv_data;
MpegEncContext *s = &r->s;
int got_picture = 0, ret;
ff_er_frame_end(&s->er, NULL);
ff_mpv_frame_end(s);
s->mb_num_left = 0;
if (HAVE_THREADS && (s->avctx->active_thread_type & FF_THREAD_FRAME))
ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
if (s->pict_type == AV_PICTURE_TYPE_B) {
if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
return ret;
ff_print_debug_info(s, s->current_picture_ptr, pict);
ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
got_picture = 1;
} else if (s->last_picture_ptr) {
if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
return ret;
ff_print_debug_info(s, s->last_picture_ptr, pict);
ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
got_picture = 1;
}
return got_picture;
}
static AVRational update_sar(int old_w, int old_h, AVRational sar, int new_w, int new_h)
{
// attempt to keep aspect during typical resolution switches
if (!sar.num)
sar = (AVRational){1, 1};
sar = av_mul_q(sar, av_mul_q((AVRational){new_h, new_w}, (AVRational){old_w, old_h}));
return sar;
}
int ff_rv34_decode_frame(AVCodecContext *avctx, AVFrame *pict,
int *got_picture_ptr, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
RV34DecContext *r = avctx->priv_data;
MpegEncContext *s = &r->s;
SliceInfo si;
int i, ret;
int slice_count;
const uint8_t *slices_hdr = NULL;
int last = 0;
int faulty_b = 0;
int offset;
/* no supplementary picture */
if (buf_size == 0) {
/* special case for last picture */
if (s->next_picture_ptr) {
if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
return ret;
s->next_picture_ptr = NULL;
*got_picture_ptr = 1;
}
return 0;
}
slice_count = (*buf++) + 1;
slices_hdr = buf + 4;
buf += 8 * slice_count;
buf_size -= 1 + 8 * slice_count;
offset = get_slice_offset(avctx, slices_hdr, 0, slice_count, buf_size);
//parse first slice header to check whether this frame can be decoded
if(offset < 0 || offset > buf_size){
av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
return AVERROR_INVALIDDATA;
}
init_get_bits(&s->gb, buf+offset, (buf_size-offset)*8);
if(r->parse_slice_header(r, &r->s.gb, &si) < 0 || si.start){
av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n");
return AVERROR_INVALIDDATA;
}
if ((!s->last_picture_ptr || !s->last_picture_ptr->f->data[0]) &&
si.type == AV_PICTURE_TYPE_B) {
av_log(avctx, AV_LOG_ERROR, "Invalid decoder state: B-frame without "
"reference data.\n");
faulty_b = 1;
}
if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==AV_PICTURE_TYPE_B)
|| (avctx->skip_frame >= AVDISCARD_NONKEY && si.type!=AV_PICTURE_TYPE_I)
|| avctx->skip_frame >= AVDISCARD_ALL)
return avpkt->size;
/* first slice */
if (si.start == 0) {
if (s->mb_num_left > 0 && s->current_picture_ptr) {
av_log(avctx, AV_LOG_ERROR, "New frame but still %d MB left.\n",
s->mb_num_left);
if (!s->context_reinit)
ff_er_frame_end(&s->er, NULL);
ff_mpv_frame_end(s);
}
if (s->width != si.width || s->height != si.height || s->context_reinit) {
int err;
av_log(s->avctx, AV_LOG_WARNING, "Changing dimensions to %dx%d\n",
si.width, si.height);
if (av_image_check_size(si.width, si.height, 0, s->avctx))
return AVERROR_INVALIDDATA;
s->avctx->sample_aspect_ratio = update_sar(
s->width, s->height, s->avctx->sample_aspect_ratio,
si.width, si.height);
s->width = si.width;
s->height = si.height;
err = ff_set_dimensions(s->avctx, s->width, s->height);
if (err < 0)
return err;
if ((err = ff_mpv_common_frame_size_change(s)) < 0)
return err;
if ((err = rv34_decoder_realloc(r)) < 0)
return err;
}
if (faulty_b)
return AVERROR_INVALIDDATA;
s->pict_type = si.type ? si.type : AV_PICTURE_TYPE_I;
if (ff_mpv_frame_start(s, s->avctx) < 0)
return -1;
ff_mpeg_er_frame_start(s);
if (!r->tmp_b_block_base) {
int i;
r->tmp_b_block_base = av_malloc(s->linesize * 48);
if (!r->tmp_b_block_base)
return AVERROR(ENOMEM);
for (i = 0; i < 2; i++)
r->tmp_b_block_y[i] = r->tmp_b_block_base
+ i * 16 * s->linesize;
for (i = 0; i < 4; i++)
r->tmp_b_block_uv[i] = r->tmp_b_block_base + 32 * s->linesize
+ (i >> 1) * 8 * s->uvlinesize
+ (i & 1) * 16;
}
r->cur_pts = si.pts;
if (s->pict_type != AV_PICTURE_TYPE_B) {
r->last_pts = r->next_pts;
r->next_pts = r->cur_pts;
} else {
int refdist = GET_PTS_DIFF(r->next_pts, r->last_pts);
int dist0 = GET_PTS_DIFF(r->cur_pts, r->last_pts);
int dist1 = GET_PTS_DIFF(r->next_pts, r->cur_pts);
if(!refdist){
r->mv_weight1 = r->mv_weight2 = r->weight1 = r->weight2 = 8192;
r->scaled_weight = 0;
}else{
if (FFMAX(dist0, dist1) > refdist)
av_log(avctx, AV_LOG_TRACE, "distance overflow\n");
r->mv_weight1 = (dist0 << 14) / refdist;
r->mv_weight2 = (dist1 << 14) / refdist;
if((r->mv_weight1|r->mv_weight2) & 511){
r->weight1 = r->mv_weight1;
r->weight2 = r->mv_weight2;
r->scaled_weight = 0;
}else{
r->weight1 = r->mv_weight1 >> 9;
r->weight2 = r->mv_weight2 >> 9;
r->scaled_weight = 1;
}
}
}
s->mb_x = s->mb_y = 0;
ff_thread_finish_setup(s->avctx);
} else if (s->context_reinit) {
av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames to "
"reinitialize (start MB is %d).\n", si.start);
return AVERROR_INVALIDDATA;
} else if (HAVE_THREADS &&
(s->avctx->active_thread_type & FF_THREAD_FRAME)) {
av_log(s->avctx, AV_LOG_ERROR, "Decoder needs full frames in frame "
"multithreading mode (start MB is %d).\n", si.start);
return AVERROR_INVALIDDATA;
}
for(i = 0; i < slice_count; i++){
int offset = get_slice_offset(avctx, slices_hdr, i , slice_count, buf_size);
int offset1 = get_slice_offset(avctx, slices_hdr, i+1, slice_count, buf_size);
int size;
if(offset < 0 || offset > offset1 || offset1 > buf_size){
av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
break;
}
size = offset1 - offset;
r->si.end = s->mb_width * s->mb_height;
s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
if(i+1 < slice_count){
int offset2 = get_slice_offset(avctx, slices_hdr, i+2, slice_count, buf_size);
if (offset2 < offset1 || offset2 > buf_size) {
av_log(avctx, AV_LOG_ERROR, "Slice offset is invalid\n");
break;
}
init_get_bits(&s->gb, buf+offset1, (buf_size-offset1)*8);
if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
size = offset2 - offset;
}else
r->si.end = si.start;
}
av_assert0 (size >= 0 && size <= buf_size - offset);
last = rv34_decode_slice(r, r->si.end, buf + offset, size);
if(last)
break;
}
if (s->current_picture_ptr) {
if (last) {
if(r->loop_filter)
r->loop_filter(r, s->mb_height - 1);
ret = finish_frame(avctx, pict);
if (ret < 0)
return ret;
*got_picture_ptr = ret;
} else if (HAVE_THREADS &&
(s->avctx->active_thread_type & FF_THREAD_FRAME)) {
av_log(avctx, AV_LOG_INFO, "marking unfished frame as finished\n");
/* always mark the current frame as finished, frame-mt supports
* only complete frames */
ff_er_frame_end(&s->er, NULL);
ff_mpv_frame_end(s);
s->mb_num_left = 0;
ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
return AVERROR_INVALIDDATA;
}
}
return avpkt->size;
}
av_cold int ff_rv34_decode_end(AVCodecContext *avctx)
{
RV34DecContext *r = avctx->priv_data;
ff_mpv_common_end(&r->s);
rv34_decoder_free(r);
return 0;
}
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