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FFmpeg/libavcodec/rv34.c

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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 rv34.c
* RV30/40 decoder common data
*/
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
#include "golomb.h"
#include "rectangle.h"
#include "rv34vlc.h"
#include "rv34data.h"
#include "rv34.h"
//#define DEBUG
/** 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_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
};
static RV34VLC intra_vlcs[NUM_INTRA_TABLES], inter_vlcs[NUM_INTER_TABLES];
/**
* @defgroup vlc RV30/40 VLC generating functions
* @{
*/
/**
* Generate VLC from codeword lengths.
* @param bits codeword lengths (zeroes are accepted)
* @param size length of input data
* @param insyms symbols for input codes (NULL for default ones)
*/
static void rv34_gen_vlc(const uint8_t *bits, int size, VLC *vlc, const uint8_t *insyms)
{
int i;
int counts[17] = {0}, codes[17];
uint16_t cw[size], syms[size];
uint8_t bits2[size];
int maxbits = 0, realsize = 0;
for(i = 0; i < size; i++){
if(bits[i]){
bits2[realsize] = bits[i];
syms[realsize] = insyms ? insyms[i] : i;
realsize++;
maxbits = FFMAX(maxbits, bits[i]);
counts[bits[i]]++;
}
}
codes[0] = 0;
for(i = 0; i < 16; i++)
codes[i+1] = (codes[i] + counts[i]) << 1;
for(i = 0; i < realsize; i++)
cw[i] = codes[bits2[i]]++;
init_vlc_sparse(vlc, FFMIN(maxbits, 9), realsize,
bits2, 1, 1,
cw, 2, 2,
syms, 2, 2, INIT_VLC_USE_STATIC);
}
/**
* Initialize all tables.
*/
static void rv34_init_tables()
{
int i, j, k;
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);
rv34_gen_vlc(rv34_table_intra_secondpat[i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].second_pattern[j], NULL);
rv34_gen_vlc(rv34_table_intra_thirdpat [i][j], OTHERBLK_VLC_SIZE, &intra_vlcs[i].third_pattern[j], NULL);
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);
}
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);
rv34_gen_vlc(rv34_intra_coeff[i], COEFF_VLC_SIZE, &intra_vlcs[i].coefficient, NULL);
}
for(i = 0; i < NUM_INTER_TABLES; i++){
rv34_gen_vlc(rv34_inter_cbppat[i], CBPPAT_VLC_SIZE, &inter_vlcs[i].cbppattern[0], NULL);
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);
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);
rv34_gen_vlc(rv34_table_inter_secondpat[i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].second_pattern[j], NULL);
rv34_gen_vlc(rv34_table_inter_thirdpat [i][j], OTHERBLK_VLC_SIZE, &inter_vlcs[i].third_pattern[j], NULL);
}
rv34_gen_vlc(rv34_inter_coeff[i], COEFF_VLC_SIZE, &inter_vlcs[i].coefficient, NULL);
}
}
/** @} */ // vlc group
/**
* @defgroup transform RV30/40 inverse transform functions
* @{
*/
static av_always_inline void rv34_row_transform(int temp[16], DCTELEM *block)
{
int i;
for(i=0; i<4; i++){
const int z0= 13*(block[i+8*0] + block[i+8*2]);
const int z1= 13*(block[i+8*0] - block[i+8*2]);
const int z2= 7* block[i+8*1] - 17*block[i+8*3];
const int z3= 17* block[i+8*1] + 7*block[i+8*3];
temp[4*i+0]= z0+z3;
temp[4*i+1]= z1+z2;
temp[4*i+2]= z1-z2;
temp[4*i+3]= z0-z3;
}
}
/**
* Real Video 3.0/4.0 inverse transform
* Code is almost the same as in SVQ3, only scaling is different.
*/
static void rv34_inv_transform(DCTELEM *block){
int temp[16];
int i;
rv34_row_transform(temp, block);
for(i=0; i<4; i++){
const int z0= 13*(temp[4*0+i] + temp[4*2+i]) + 0x200;
const int z1= 13*(temp[4*0+i] - temp[4*2+i]) + 0x200;
const int z2= 7* temp[4*1+i] - 17*temp[4*3+i];
const int z3= 17* temp[4*1+i] + 7*temp[4*3+i];
block[i*8+0]= (z0 + z3)>>10;
block[i*8+1]= (z1 + z2)>>10;
block[i*8+2]= (z1 - z2)>>10;
block[i*8+3]= (z0 - z3)>>10;
}
}
/**
* RealVideo 3.0/4.0 inverse transform for DC block
*
* Code is almost the same as rv34_inv_transform()
* but final coefficients are multiplied by 1.5 and have no rounding.
*/
static void rv34_inv_transform_noround(DCTELEM *block){
int temp[16];
int i;
rv34_row_transform(temp, block);
for(i=0; i<4; i++){
const int z0= 13*(temp[4*0+i] + temp[4*2+i]);
const int z1= 13*(temp[4*0+i] - temp[4*2+i]);
const int z2= 7* temp[4*1+i] - 17*temp[4*3+i];
const int z3= 17* temp[4*1+i] + 7*temp[4*3+i];
block[i*8+0]= ((z0 + z3)*3)>>11;
block[i*8+1]= ((z1 + z2)*3)>>11;
block[i*8+2]= ((z1 - z2)*3)>>11;
block[i*8+3]= ((z0 - z3)*3)>>11;
}
}
/** @} */ // transform
/**
* @defgroup block 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 };
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][i];
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 bistream and store it.
*/
static inline void decode_coeff(DCTELEM *dst, int coef, int esc, GetBitContext *gb, VLC* vlc)
{
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;
}
}
/**
* Decode 2x2 subblock of coefficients.
*/
static inline void decode_subblock(DCTELEM *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc)
{
int coeffs[4];
coeffs[0] = modulo_three_table[code][0];
coeffs[1] = modulo_three_table[code][1];
coeffs[2] = modulo_three_table[code][2];
coeffs[3] = modulo_three_table[code][3];
decode_coeff(dst , coeffs[0], 3, gb, vlc);
if(is_block2){
decode_coeff(dst+8, coeffs[1], 2, gb, vlc);
decode_coeff(dst+1, coeffs[2], 2, gb, vlc);
}else{
decode_coeff(dst+1, coeffs[1], 2, gb, vlc);
decode_coeff(dst+8, coeffs[2], 2, gb, vlc);
}
decode_coeff(dst+9, coeffs[3], 2, gb, vlc);
}
/**
* 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 inline void rv34_decode_block(DCTELEM *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc)
{
int code, pattern;
code = get_vlc2(gb, rvlc->first_pattern[fc].table, 9, 2);
pattern = code & 0x7;
code >>= 3;
decode_subblock(dst, code, 0, gb, &rvlc->coefficient);
if(pattern & 4){
code = get_vlc2(gb, rvlc->second_pattern[sc].table, 9, 2);
decode_subblock(dst + 2, code, 0, gb, &rvlc->coefficient);
}
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 + 8*2, code, 1, gb, &rvlc->coefficient);
}
if(pattern & 1){
code = get_vlc2(gb, rvlc->third_pattern[sc].table, 9, 2);
decode_subblock(dst + 8*2+2, code, 0, gb, &rvlc->coefficient);
}
}
/**
* Dequantize ordinary 4x4 block.
* @todo optimize
*/
static inline void rv34_dequant4x4(DCTELEM *block, int Qdc, int Q)
{
int i, j;
block[0] = (block[0] * Qdc + 8) >> 4;
for(i = 0; i < 4; i++)
for(j = !i; j < 4; j++)
block[j + i*8] = (block[j + i*8] * Q + 8) >> 4;
}
/**
* Dequantize 4x4 block of DC values for 16x16 macroblock.
* @todo optimize
*/
static inline void rv34_dequant4x4_16x16(DCTELEM *block, int Qdc, int Q)
{
int i;
for(i = 0; i < 3; i++)
block[rv34_dezigzag[i]] = (block[rv34_dezigzag[i]] * Qdc + 8) >> 4;
for(; i < 16; i++)
block[rv34_dezigzag[i]] = (block[rv34_dezigzag[i]] * Q + 8) >> 4;
}
/** @} */ //block functions
/**
* @defgroup bitstream 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)
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;
return type ? &inter_vlcs[rv34_quant_to_vlc_set[1][av_clip(quant, 0, 30)]]
: &intra_vlcs[rv34_quant_to_vlc_set[0][av_clip(quant, 0, 30)]];
}
/**
* Decode quantizer difference and return modified quantizer.
*/
static inline int rv34_decode_dquant(GetBitContext *gb, int quant)
{
if(get_bits1(gb))
return rv34_dquant_tab[get_bits1(gb)][quant];
else
return get_bits(gb, 5);
}
/** @} */ //bitstream functions
/**
* @defgroup mv 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] = { 5, 6, 9, 10 };
/**
* 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_index = 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(r->avail_cache[avail_index - 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(r->avail_cache[avail_index - 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(!r->avail_cache[avail_index - 4 + c_off]){
if(r->avail_cache[avail_index - 4] && (r->avail_cache[avail_index - 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;
}
}
}
/**
* Calculate motion vector component that should be added for direct blocks.
*/
static int calc_add_mv(MpegEncContext *s, int dir, int component)
{
int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
int sum;
sum = (s->next_picture_ptr->motion_val[0][mv_pos][component] +
s->next_picture_ptr->motion_val[0][mv_pos + 1][component] +
s->next_picture_ptr->motion_val[0][mv_pos + s->b8_stride][component] +
s->next_picture_ptr->motion_val[0][mv_pos + s->b8_stride + 1][component]) >> 2;
return dir ? -(sum >> 1) : ((sum + 1) >> 1);
}
/**
* 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], B[2], C[2];
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];
memset(A, 0, sizeof(A));
memset(B, 0, sizeof(B));
memset(C, 0, sizeof(C));
if((r->avail_cache[5-1] & 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[5-4] & 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[5-2] & 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[5-5] & 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];
if(block_type == RV34_MB_B_DIRECT){
mx += calc_add_mv(s, dir, 0);
my += calc_add_mv(s, 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)
fill_rectangle(cur_pic->motion_val[!dir][mv_pos], 2, 2, s->b8_stride, 0, 4);
}
static const int chroma_coeffs[3] = { 8, 5, 3 };
/**
* 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
*/
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,
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, 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;
if(thirdpel){
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;
uvmx = chroma_coeffs[(3*(mx&1) + lx) >> 1];
uvmy = chroma_coeffs[(3*(my&1) + ly) >> 1];
}else{
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;
uvmx = mx & 6;
uvmy = my & 6;
}
dxy = ly*4 + lx;
srcY = dir ? s->next_picture_ptr->data[0] : s->last_picture_ptr->data[0];
srcU = dir ? s->next_picture_ptr->data[1] : s->last_picture_ptr->data[1];
srcV = dir ? s->next_picture_ptr->data[2] : s->last_picture_ptr->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) + (mx >> 1);
uvsrc_y = s->mb_y * 8 + (yoff >> 1) + (my >> 1);
srcY += src_y * s->linesize + src_x;
srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
if( (unsigned)(src_x - !!lx*2) > s->h_edge_pos - !!lx*2 - (width <<3) - 3
|| (unsigned)(src_y - !!ly*2) > s->v_edge_pos - !!ly*2 - (height<<3) - 3){
uint8_t *uvbuf= s->edge_emu_buffer + 20 * s->linesize;
srcY -= 2 + 2*s->linesize;
ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, (width<<3)+4, (height<<3)+4,
src_x - 2, src_y - 2, s->h_edge_pos, s->v_edge_pos);
srcY = s->edge_emu_buffer + 2 + 2*s->linesize;
ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, (width<<2)+1, (height<<2)+1,
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, (width<<2)+1, (height<<2)+1,
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
srcU = uvbuf;
srcV = uvbuf + 16;
}
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;
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);
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,
r->rv30 ? r->s.dsp.put_rv30_tpel_pixels_tab
: r->s.dsp.put_h264_qpel_pixels_tab,
r->s.dsp.put_h264_chroma_pixels_tab);
}
static void rv34_mc_2mv(RV34DecContext *r, const int block_type)
{
rv34_mc(r, block_type, 0, 0, 0, 2, 2, 0, r->rv30,
r->rv30 ? r->s.dsp.put_rv30_tpel_pixels_tab
: r->s.dsp.put_h264_qpel_pixels_tab,
r->s.dsp.put_h264_chroma_pixels_tab);
rv34_mc(r, block_type, 0, 0, 0, 2, 2, 1, r->rv30,
r->rv30 ? r->s.dsp.avg_rv30_tpel_pixels_tab
: r->s.dsp.avg_h264_qpel_pixels_tab,
r->s.dsp.avg_h264_chroma_pixels_tab);
}
/** 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;
memset(r->dmv, 0, sizeof(r->dmv));
for(i = 0; i < num_mvs[block_type]; i++){
r->dmv[i][0] = svq3_get_se_golomb(gb);
r->dmv[i][1] = svq3_get_se_golomb(gb);
}
switch(block_type){
case RV34_MB_TYPE_INTRA:
case RV34_MB_TYPE_INTRA16x16:
fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4);
return 0;
case RV34_MB_SKIP:
if(s->pict_type == P_TYPE){
fill_rectangle(s->current_picture_ptr->motion_val[0][s->mb_x * 2 + s->mb_y * 2 * s->b8_stride], 2, 2, s->b8_stride, 0, 4);
rv34_mc_1mv (r, block_type, 0, 0, 0, 2, 2, 0);
break;
}
case RV34_MB_B_DIRECT:
rv34_pred_mv_b (r, RV34_MB_B_DIRECT, 0);
rv34_pred_mv_b (r, RV34_MB_B_DIRECT, 1);
rv34_mc_2mv (r, RV34_MB_B_DIRECT);
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];
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
/**
* @defgroup recons 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] * 0x01010101;
prev = &topleft;
}
r->h.pred4x4[itype](dst, prev, stride);
}
/** add_pixels_clamped for 4x4 block */
static void rv34_add_4x4_block(uint8_t *dst, int stride, DCTELEM block[64], int off)
{
int x, y;
for(y = 0; y < 4; y++)
for(x = 0; x < 4; x++)
dst[x + y*stride] = av_clip_uint8(dst[x + y*stride] + block[off + x+y*8]);
}
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 void rv34_output_macroblock(RV34DecContext *r, int8_t *intra_types, int cbp, int is16)
{
MpegEncContext *s = &r->s;
DSPContext *dsp = &s->dsp;
int i, j;
uint8_t *Y, *U, *V;
int itype;
int avail[6*8] = {0};
int idx;
// Set neighbour information.
if(r->avail_cache[0])
avail[0] = 1;
if(r->avail_cache[1])
avail[1] = avail[2] = 1;
if(r->avail_cache[2])
avail[3] = avail[4] = 1;
if(r->avail_cache[3])
avail[5] = 1;
if(r->avail_cache[4])
avail[8] = avail[16] = 1;
if(r->avail_cache[8])
avail[24] = avail[32] = 1;
Y = s->dest[0];
U = s->dest[1];
V = s->dest[2];
if(!is16){
for(j = 0; j < 4; j++){
idx = 9 + j*8;
for(i = 0; i < 4; i++, cbp >>= 1, Y += 4, idx++){
rv34_pred_4x4_block(r, Y, s->linesize, ittrans[intra_types[i]], avail[idx-8], avail[idx-1], avail[idx+7], avail[idx-7]);
avail[idx] = 1;
if(cbp & 1)
rv34_add_4x4_block(Y, s->linesize, s->block[(i>>1)+(j&2)], (i&1)*4+(j&1)*32);
}
Y += s->linesize * 4 - 4*4;
intra_types += s->b4_stride;
}
intra_types -= s->b4_stride * 4;
fill_rectangle(r->avail_cache + 5, 2, 2, 4, 0, 4);
for(j = 0; j < 2; j++){
idx = 5 + j*4;
for(i = 0; i < 2; i++, cbp >>= 1, idx++){
rv34_pred_4x4_block(r, U + i*4 + j*4*s->uvlinesize, s->uvlinesize, ittrans[intra_types[i*2+j*2*s->b4_stride]], r->avail_cache[idx-4], r->avail_cache[idx-1], !i && !j, r->avail_cache[idx-3]);
rv34_pred_4x4_block(r, V + i*4 + j*4*s->uvlinesize, s->uvlinesize, ittrans[intra_types[i*2+j*2*s->b4_stride]], r->avail_cache[idx-4], r->avail_cache[idx-1], !i && !j, r->avail_cache[idx-3]);
r->avail_cache[idx] = 1;
if(cbp & 0x01)
rv34_add_4x4_block(U + i*4 + j*4*s->uvlinesize, s->uvlinesize, s->block[4], i*4+j*32);
if(cbp & 0x10)
rv34_add_4x4_block(V + i*4 + j*4*s->uvlinesize, s->uvlinesize, s->block[5], i*4+j*32);
}
}
}else{
itype = ittrans16[intra_types[0]];
itype = adjust_pred16(itype, r->avail_cache[5-4], r->avail_cache[5-1]);
r->h.pred16x16[itype](Y, s->linesize);
dsp->add_pixels_clamped(s->block[0], Y, s->current_picture.linesize[0]);
dsp->add_pixels_clamped(s->block[1], Y + 8, s->current_picture.linesize[0]);
Y += s->current_picture.linesize[0] * 8;
dsp->add_pixels_clamped(s->block[2], Y, s->current_picture.linesize[0]);
dsp->add_pixels_clamped(s->block[3], Y + 8, s->current_picture.linesize[0]);
itype = ittrans16[intra_types[0]];
if(itype == PLANE_PRED8x8) itype = DC_PRED8x8;
itype = adjust_pred16(itype, r->avail_cache[5-4], r->avail_cache[5-1]);
r->h.pred8x8[itype](U, s->uvlinesize);
dsp->add_pixels_clamped(s->block[4], U, s->uvlinesize);
r->h.pred8x8[itype](V, s->uvlinesize);
dsp->add_pixels_clamped(s->block[5], V, s->uvlinesize);
}
}
/** @} */ // recons group
/**
* @addtogroup bitstream
* Decode macroblock header and return CBP in case of success, -1 otherwise.
*/
static int rv34_decode_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;
if(!r->si.type){
r->is16 = get_bits1(gb);
if(!r->is16 && !r->rv30){
if(!get_bits1(gb))
av_log(s->avctx, AV_LOG_ERROR, "Need DQUANT\n");
}
s->current_picture_ptr->mb_type[mb_pos] = r->is16 ? MB_TYPE_INTRA16x16 : MB_TYPE_INTRA;
r->block_type = r->is16 ? RV34_MB_TYPE_INTRA16x16 : RV34_MB_TYPE_INTRA;
}else{
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 == P_TYPE)
r->mb_type[mb_pos] = RV34_MB_P_16x16;
if(s->pict_type == B_TYPE)
r->mb_type[mb_pos] = RV34_MB_B_DIRECT;
}
r->is16 = !!IS_INTRA16x16(s->current_picture_ptr->mb_type[mb_pos]);
rv34_decode_mv(r, r->block_type);
if(r->block_type == RV34_MB_SKIP){
fill_rectangle(intra_types, 4, 4, s->b4_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, s->b4_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) * s->b4_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);
}
/**
* @addtogroup recons
* @{
*/
/**
* mask for retrieving all bits in coded block pattern
* corresponding to one 8x8 block
*/
#define LUMA_CBP_BLOCK_MASK 0x303
#define U_CBP_MASK 0x0F0000
#define V_CBP_MASK 0xF00000
static void rv34_apply_differences(RV34DecContext *r, int cbp)
{
static const int shifts[4] = { 0, 2, 8, 10 };
MpegEncContext *s = &r->s;
int i;
for(i = 0; i < 4; i++)
if(cbp & (LUMA_CBP_BLOCK_MASK << shifts[i]))
s->dsp.add_pixels_clamped(s->block[i], s->dest[0] + (i & 1)*8 + (i&2)*4*s->linesize, s->linesize);
if(cbp & U_CBP_MASK)
s->dsp.add_pixels_clamped(s->block[4], s->dest[1], s->uvlinesize);
if(cbp & V_CBP_MASK)
s->dsp.add_pixels_clamped(s->block[5], s->dest[2], s->uvlinesize);
}
static int rv34_decode_macroblock(RV34DecContext *r, int8_t *intra_types)
{
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int cbp, cbp2;
int i, blknum, blkoff;
DCTELEM block16[64];
int luma_dc_quant;
int 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 + 5, 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[4] =
r->avail_cache[8] = s->current_picture_ptr->mb_type[mb_pos - 1];
if(dist >= s->mb_width)
r->avail_cache[1] =
r->avail_cache[2] = 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[3] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride + 1];
if(s->mb_x && dist > s->mb_width)
r->avail_cache[0] = s->current_picture_ptr->mb_type[mb_pos - s->mb_stride - 1];
s->qscale = r->si.quant;
cbp = cbp2 = rv34_decode_mb_header(r, intra_types);
if(cbp == -1)
return -1;
luma_dc_quant = r->si.type ? r->luma_dc_quant_p[s->qscale] : r->luma_dc_quant_i[s->qscale];
if(r->is16){
memset(block16, 0, sizeof(block16));
rv34_decode_block(block16, gb, r->cur_vlcs, 3, 0);
rv34_dequant4x4_16x16(block16, rv34_qscale_tab[luma_dc_quant],rv34_qscale_tab[s->qscale]);
rv34_inv_transform_noround(block16);
}
for(i = 0; i < 16; i++, cbp >>= 1){
if(!r->is16 && !(cbp & 1)) continue;
blknum = ((i & 2) >> 1) + ((i & 8) >> 2);
blkoff = ((i & 1) << 2) + ((i & 4) << 3);
if(cbp & 1)
rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->luma_vlc, 0);
rv34_dequant4x4(s->block[blknum] + blkoff, rv34_qscale_tab[luma_dc_quant],rv34_qscale_tab[s->qscale]);
if(r->is16) //FIXME: optimize
s->block[blknum][blkoff] = block16[(i & 3) | ((i & 0xC) << 1)];
rv34_inv_transform(s->block[blknum] + blkoff);
}
if(r->block_type == RV34_MB_P_MIX16x16)
r->cur_vlcs = choose_vlc_set(r->si.quant, r->si.vlc_set, 1);
for(; i < 24; i++, cbp >>= 1){
if(!(cbp & 1)) continue;
blknum = ((i & 4) >> 2) + 4;
blkoff = ((i & 1) << 2) + ((i & 2) << 4);
rv34_decode_block(s->block[blknum] + blkoff, gb, r->cur_vlcs, r->chroma_vlc, 1);
rv34_dequant4x4(s->block[blknum] + blkoff, rv34_qscale_tab[rv34_chroma_quant[1][s->qscale]],rv34_qscale_tab[rv34_chroma_quant[0][s->qscale]]);
rv34_inv_transform(s->block[blknum] + blkoff);
}
if(IS_INTRA(s->current_picture_ptr->mb_type[s->mb_x + s->mb_y*s->mb_stride]))
rv34_output_macroblock(r, intra_types, cbp2, r->is16);
else
rv34_apply_differences(r, cbp2);
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 = r->bits - get_bits_count(&s->gb);
if(bits < 0 || (bits < 8 && !show_bits(&s->gb, bits)))
return 1;
return 0;
}
static inline int slice_compare(SliceInfo *si1, SliceInfo *si2)
{
return si1->type != si2->type ||
si1->start >= si2->start ||
si1->width != si2->width ||
si1->height != si2->height;
}
static int rv34_decode_slice(RV34DecContext *r, int end, uint8_t* buf, int buf_size)
{
MpegEncContext *s = &r->s;
GetBitContext *gb = &s->gb;
int mb_pos;
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;
}
if ((s->mb_x == 0 && s->mb_y == 0) || s->current_picture_ptr==NULL) {
if(s->width != r->si.width || s->height != r->si.height){
av_log(s->avctx, AV_LOG_DEBUG, "Changing dimensions to %dx%d\n", r->si.width,r->si.height);
MPV_common_end(s);
s->width = r->si.width;
s->height = r->si.height;
if(MPV_common_init(s) < 0)
return -1;
r->intra_types_hist = av_realloc(r->intra_types_hist, s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist));
r->intra_types = r->intra_types_hist + s->b4_stride * 4;
r->mb_type = av_realloc(r->mb_type, r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type));
}
s->pict_type = r->si.type ? r->si.type : I_TYPE;
if(MPV_frame_start(s, s->avctx) < 0)
return -1;
ff_er_frame_start(s);
s->current_picture_ptr = &s->current_picture;
s->mb_x = s->mb_y = 0;
}
r->si.end = end;
s->qscale = r->si.quant;
r->bits = buf_size*8;
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, s->b4_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);
s->dsp.clear_blocks(s->block[0]);
if(rv34_decode_macroblock(r, r->intra_types + s->mb_x * 4 + 1) < 0){
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_ERROR|DC_ERROR|MV_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, s->b4_stride * 4 * sizeof(*r->intra_types_hist));
memset(r->intra_types, -1, s->b4_stride * 4 * sizeof(*r->intra_types_hist));
}
if(s->mb_x == s->resync_mb_x)
s->first_slice_line=0;
s->mb_num_left--;
}
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
return (s->mb_y == s->mb_height);
}
/** @} */ // recons group end
/**
* Initialize decoder.
*/
int ff_rv34_decode_init(AVCodecContext *avctx)
{
RV34DecContext *r = avctx->priv_data;
MpegEncContext *s = &r->s;
MPV_decode_defaults(s);
s->avctx= avctx;
s->out_format = FMT_H263;
s->codec_id= avctx->codec_id;
s->width = avctx->width;
s->height = avctx->height;
r->s.avctx = avctx;
avctx->flags |= CODEC_FLAG_EMU_EDGE;
r->s.flags |= CODEC_FLAG_EMU_EDGE;
avctx->pix_fmt = PIX_FMT_YUV420P;
avctx->has_b_frames = 1;
s->low_delay = 0;
if (MPV_common_init(s) < 0)
return -1;
ff_h264_pred_init(&r->h, CODEC_ID_RV40);
r->intra_types_hist = av_malloc(s->b4_stride * 4 * 2 * sizeof(*r->intra_types_hist));
r->intra_types = r->intra_types_hist + s->b4_stride * 4;
r->mb_type = av_mallocz(r->s.mb_stride * r->s.mb_height * sizeof(*r->mb_type));
if(!intra_vlcs[0].cbppattern[0].bits)
rv34_init_tables();
return 0;
}
static int get_slice_offset(AVCodecContext *avctx, uint8_t *buf, int n)
{
if(avctx->slice_count) return avctx->slice_offset[n];
else return AV_RL32(buf + n*8 - 4) == 1 ? AV_RL32(buf + n*8) : AV_RB32(buf + n*8);
}
int ff_rv34_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
RV34DecContext *r = avctx->priv_data;
MpegEncContext *s = &r->s;
AVFrame *pict = data;
SliceInfo si;
int i;
int slice_count;
uint8_t *slices_hdr = NULL;
int last = 0;
/* no supplementary picture */
if (buf_size == 0) {
/* special case for last picture */
if (s->low_delay==0 && s->next_picture_ptr) {
*pict= *(AVFrame*)s->next_picture_ptr;
s->next_picture_ptr= NULL;
*data_size = sizeof(AVFrame);
}
return 0;
}
if(!avctx->slice_count){
slice_count = (*buf++) + 1;
slices_hdr = buf + 4;
buf += 8 * slice_count;
}else
slice_count = avctx->slice_count;
for(i=0; i<slice_count; i++){
int offset= get_slice_offset(avctx, slices_hdr, i);
int size;
if(i+1 == slice_count)
size= buf_size - offset;
else
size= get_slice_offset(avctx, slices_hdr, i+1) - offset;
r->si.end = s->mb_width * s->mb_height;
if(i+1 < slice_count){
init_get_bits(&s->gb, buf+get_slice_offset(avctx, slices_hdr, i+1), (buf_size-get_slice_offset(avctx, slices_hdr, i+1))*8);
if(r->parse_slice_header(r, &r->s.gb, &si) < 0){
if(i+2 < slice_count)
size = get_slice_offset(avctx, slices_hdr, i+2) - offset;
else
size = buf_size - offset;
}else
r->si.end = si.start;
}
last = rv34_decode_slice(r, r->si.end, buf + offset, size);
s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
if(last)
break;
}
if(last){
if(r->loop_filter)
r->loop_filter(r);
ff_er_frame_end(s);
MPV_frame_end(s);
if (s->pict_type == B_TYPE || s->low_delay) {
*pict= *(AVFrame*)s->current_picture_ptr;
} else if (s->last_picture_ptr != NULL) {
*pict= *(AVFrame*)s->last_picture_ptr;
}
if(s->last_picture_ptr || s->low_delay){
*data_size = sizeof(AVFrame);
ff_print_debug_info(s, pict);
}
s->current_picture_ptr= NULL; //so we can detect if frame_end wasnt called (find some nicer solution...)
}
return buf_size;
}
int ff_rv34_decode_end(AVCodecContext *avctx)
{
RV34DecContext *r = avctx->priv_data;
MPV_common_end(&r->s);
av_freep(&r->intra_types_hist);
r->intra_types = NULL;
av_freep(&r->mb_type);
return 0;
}