+++ /dev/null
-/*
- * 4XM codec
- * Copyright (c) 2003 Michael Niedermayer
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/**
- * @file 4xm.c
- * 4XM codec.
- */
-
-#include "avcodec.h"
-#include "dsputil.h"
-#include "mpegvideo.h"
-
-//#undef NDEBUG
-//#include <assert.h>
-
-#define BLOCK_TYPE_VLC_BITS 5
-#define ACDC_VLC_BITS 9
-
-#define CFRAME_BUFFER_COUNT 100
-
-static const uint8_t block_type_tab[4][8][2]={
- { //{8,4,2}x{8,4,2}
- { 0,1}, { 2,2}, { 6,3}, {14,4}, {30,5}, {31,5}, { 0,0}
- },{ //{8,4}x1
- { 0,1}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4}, { 0,0}
- },{ //1x{8,4}
- { 0,1}, { 2,2}, { 0,0}, { 6,3}, {14,4}, {15,4}, { 0,0}
- },{ //1x2, 2x1
- { 0,1}, { 0,0}, { 0,0}, { 2,2}, { 6,3}, {14,4}, {15,4}
- }
-};
-
-static const uint8_t size2index[4][4]={
- {-1, 3, 1, 1},
- { 3, 0, 0, 0},
- { 2, 0, 0, 0},
- { 2, 0, 0, 0},
-};
-
-static const int8_t mv[256][2]={
-{ 0, 0},{ 0, -1},{ -1, 0},{ 1, 0},{ 0, 1},{ -1, -1},{ 1, -1},{ -1, 1},
-{ 1, 1},{ 0, -2},{ -2, 0},{ 2, 0},{ 0, 2},{ -1, -2},{ 1, -2},{ -2, -1},
-{ 2, -1},{ -2, 1},{ 2, 1},{ -1, 2},{ 1, 2},{ -2, -2},{ 2, -2},{ -2, 2},
-{ 2, 2},{ 0, -3},{ -3, 0},{ 3, 0},{ 0, 3},{ -1, -3},{ 1, -3},{ -3, -1},
-{ 3, -1},{ -3, 1},{ 3, 1},{ -1, 3},{ 1, 3},{ -2, -3},{ 2, -3},{ -3, -2},
-{ 3, -2},{ -3, 2},{ 3, 2},{ -2, 3},{ 2, 3},{ 0, -4},{ -4, 0},{ 4, 0},
-{ 0, 4},{ -1, -4},{ 1, -4},{ -4, -1},{ 4, -1},{ 4, 1},{ -1, 4},{ 1, 4},
-{ -3, -3},{ -3, 3},{ 3, 3},{ -2, -4},{ -4, -2},{ 4, -2},{ -4, 2},{ -2, 4},
-{ 2, 4},{ -3, -4},{ 3, -4},{ 4, -3},{ -5, 0},{ -4, 3},{ -3, 4},{ 3, 4},
-{ -1, -5},{ -5, -1},{ -5, 1},{ -1, 5},{ -2, -5},{ 2, -5},{ 5, -2},{ 5, 2},
-{ -4, -4},{ -4, 4},{ -3, -5},{ -5, -3},{ -5, 3},{ 3, 5},{ -6, 0},{ 0, 6},
-{ -6, -1},{ -6, 1},{ 1, 6},{ 2, -6},{ -6, 2},{ 2, 6},{ -5, -4},{ 5, 4},
-{ 4, 5},{ -6, -3},{ 6, 3},{ -7, 0},{ -1, -7},{ 5, -5},{ -7, 1},{ -1, 7},
-{ 4, -6},{ 6, 4},{ -2, -7},{ -7, 2},{ -3, -7},{ 7, -3},{ 3, 7},{ 6, -5},
-{ 0, -8},{ -1, -8},{ -7, -4},{ -8, 1},{ 4, 7},{ 2, -8},{ -2, 8},{ 6, 6},
-{ -8, 3},{ 5, -7},{ -5, 7},{ 8, -4},{ 0, -9},{ -9, -1},{ 1, 9},{ 7, -6},
-{ -7, 6},{ -5, -8},{ -5, 8},{ -9, 3},{ 9, -4},{ 7, -7},{ 8, -6},{ 6, 8},
-{ 10, 1},{-10, 2},{ 9, -5},{ 10, -3},{ -8, -7},{-10, -4},{ 6, -9},{-11, 0},
-{ 11, 1},{-11, -2},{ -2, 11},{ 7, -9},{ -7, 9},{ 10, 6},{ -4, 11},{ 8, -9},
-{ 8, 9},{ 5, 11},{ 7,-10},{ 12, -3},{ 11, 6},{ -9, -9},{ 8, 10},{ 5, 12},
-{-11, 7},{ 13, 2},{ 6,-12},{ 10, 9},{-11, 8},{ -7, 12},{ 0, 14},{ 14, -2},
-{ -9, 11},{ -6, 13},{-14, -4},{ -5,-14},{ 5, 14},{-15, -1},{-14, -6},{ 3,-15},
-{ 11,-11},{ -7, 14},{ -5, 15},{ 8,-14},{ 15, 6},{ 3, 16},{ 7,-15},{-16, 5},
-{ 0, 17},{-16, -6},{-10, 14},{-16, 7},{ 12, 13},{-16, 8},{-17, 6},{-18, 3},
-{ -7, 17},{ 15, 11},{ 16, 10},{ 2,-19},{ 3,-19},{-11,-16},{-18, 8},{-19, -6},
-{ 2,-20},{-17,-11},{-10,-18},{ 8, 19},{-21, -1},{-20, 7},{ -4, 21},{ 21, 5},
-{ 15, 16},{ 2,-22},{-10,-20},{-22, 5},{ 20,-11},{ -7,-22},{-12, 20},{ 23, -5},
-{ 13,-20},{ 24, -2},{-15, 19},{-11, 22},{ 16, 19},{ 23,-10},{-18,-18},{ -9,-24},
-{ 24,-10},{ -3, 26},{-23, 13},{-18,-20},{ 17, 21},{ -4, 27},{ 27, 6},{ 1,-28},
-{-11, 26},{-17,-23},{ 7, 28},{ 11,-27},{ 29, 5},{-23,-19},{-28,-11},{-21, 22},
-{-30, 7},{-17, 26},{-27, 16},{ 13, 29},{ 19,-26},{ 10,-31},{-14,-30},{ 20,-27},
-{-29, 18},{-16,-31},{-28,-22},{ 21,-30},{-25, 28},{ 26,-29},{ 25,-32},{-32,-32}
-};
-
-// this is simply the scaled down elementwise product of the standard jpeg quantizer table and the AAN premul table
-static const uint8_t dequant_table[64]={
- 16, 15, 13, 19, 24, 31, 28, 17,
- 17, 23, 25, 31, 36, 63, 45, 21,
- 18, 24, 27, 37, 52, 59, 49, 20,
- 16, 28, 34, 40, 60, 80, 51, 20,
- 18, 31, 48, 66, 68, 86, 56, 21,
- 19, 38, 56, 59, 64, 64, 48, 20,
- 27, 48, 55, 55, 56, 51, 35, 15,
- 20, 35, 34, 32, 31, 22, 15, 8,
-};
-
-static VLC block_type_vlc[4];
-
-
-typedef struct CFrameBuffer{
- int allocated_size;
- int size;
- int id;
- uint8_t *data;
-}CFrameBuffer;
-
-typedef struct FourXContext{
- AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame current_picture, last_picture;
- GetBitContext pre_gb; ///< ac/dc prefix
- GetBitContext gb;
- uint8_t *bytestream;
- uint16_t *wordstream;
- int mv[256];
- VLC pre_vlc;
- int last_dc;
- DCTELEM __align8 block[6][64];
- uint8_t *bitstream_buffer;
- int bitstream_buffer_size;
- CFrameBuffer cfrm[CFRAME_BUFFER_COUNT];
-} FourXContext;
-
-
-#define FIX_1_082392200 70936
-#define FIX_1_414213562 92682
-#define FIX_1_847759065 121095
-#define FIX_2_613125930 171254
-
-#define MULTIPLY(var,const) (((var)*(const)) >> 16)
-
-static void idct(DCTELEM block[64]){
- int tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
- int tmp10, tmp11, tmp12, tmp13;
- int z5, z10, z11, z12, z13;
- int i;
- int temp[64];
-
- for(i=0; i<8; i++){
- tmp10 = block[8*0 + i] + block[8*4 + i];
- tmp11 = block[8*0 + i] - block[8*4 + i];
-
- tmp13 = block[8*2 + i] + block[8*6 + i];
- tmp12 = MULTIPLY(block[8*2 + i] - block[8*6 + i], FIX_1_414213562) - tmp13;
-
- tmp0 = tmp10 + tmp13;
- tmp3 = tmp10 - tmp13;
- tmp1 = tmp11 + tmp12;
- tmp2 = tmp11 - tmp12;
-
- z13 = block[8*5 + i] + block[8*3 + i];
- z10 = block[8*5 + i] - block[8*3 + i];
- z11 = block[8*1 + i] + block[8*7 + i];
- z12 = block[8*1 + i] - block[8*7 + i];
-
- tmp7 = z11 + z13;
- tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562);
-
- z5 = MULTIPLY(z10 + z12, FIX_1_847759065);
- tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5;
- tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5;
-
- tmp6 = tmp12 - tmp7;
- tmp5 = tmp11 - tmp6;
- tmp4 = tmp10 + tmp5;
-
- temp[8*0 + i] = tmp0 + tmp7;
- temp[8*7 + i] = tmp0 - tmp7;
- temp[8*1 + i] = tmp1 + tmp6;
- temp[8*6 + i] = tmp1 - tmp6;
- temp[8*2 + i] = tmp2 + tmp5;
- temp[8*5 + i] = tmp2 - tmp5;
- temp[8*4 + i] = tmp3 + tmp4;
- temp[8*3 + i] = tmp3 - tmp4;
- }
-
- for(i=0; i<8*8; i+=8){
- tmp10 = temp[0 + i] + temp[4 + i];
- tmp11 = temp[0 + i] - temp[4 + i];
-
- tmp13 = temp[2 + i] + temp[6 + i];
- tmp12 = MULTIPLY(temp[2 + i] - temp[6 + i], FIX_1_414213562) - tmp13;
-
- tmp0 = tmp10 + tmp13;
- tmp3 = tmp10 - tmp13;
- tmp1 = tmp11 + tmp12;
- tmp2 = tmp11 - tmp12;
-
- z13 = temp[5 + i] + temp[3 + i];
- z10 = temp[5 + i] - temp[3 + i];
- z11 = temp[1 + i] + temp[7 + i];
- z12 = temp[1 + i] - temp[7 + i];
-
- tmp7 = z11 + z13;
- tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562);
-
- z5 = MULTIPLY(z10 + z12, FIX_1_847759065);
- tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5;
- tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5;
-
- tmp6 = tmp12 - tmp7;
- tmp5 = tmp11 - tmp6;
- tmp4 = tmp10 + tmp5;
-
- block[0 + i] = (tmp0 + tmp7)>>6;
- block[7 + i] = (tmp0 - tmp7)>>6;
- block[1 + i] = (tmp1 + tmp6)>>6;
- block[6 + i] = (tmp1 - tmp6)>>6;
- block[2 + i] = (tmp2 + tmp5)>>6;
- block[5 + i] = (tmp2 - tmp5)>>6;
- block[4 + i] = (tmp3 + tmp4)>>6;
- block[3 + i] = (tmp3 - tmp4)>>6;
- }
-}
-
-static void init_vlcs(FourXContext *f){
- static int done = 0;
- int i;
-
- if (!done) {
- done = 1;
-
- for(i=0; i<4; i++){
- init_vlc(&block_type_vlc[i], BLOCK_TYPE_VLC_BITS, 7,
- &block_type_tab[i][0][1], 2, 1,
- &block_type_tab[i][0][0], 2, 1);
- }
- }
-}
-
-static void init_mv(FourXContext *f){
- int i;
-
- for(i=0; i<256; i++){
- f->mv[i] = mv[i][0] + mv[i][1]*f->current_picture.linesize[0]/2;
- }
-}
-
-static inline void mcdc(uint16_t *dst, uint16_t *src, int log2w, int h, int stride, int scale, int dc){
- int i;
- dc*= 0x10001;
-
- switch(log2w){
- case 0:
- for(i=0; i<h; i++){
- dst[0] = scale*src[0] + dc;
- if(scale) src += stride;
- dst += stride;
- }
- break;
- case 1:
- for(i=0; i<h; i++){
- ((uint32_t*)dst)[0] = scale*((uint32_t*)src)[0] + dc;
- if(scale) src += stride;
- dst += stride;
- }
- break;
- case 2:
- for(i=0; i<h; i++){
- ((uint32_t*)dst)[0] = scale*((uint32_t*)src)[0] + dc;
- ((uint32_t*)dst)[1] = scale*((uint32_t*)src)[1] + dc;
- if(scale) src += stride;
- dst += stride;
- }
- break;
- case 3:
- for(i=0; i<h; i++){
- ((uint32_t*)dst)[0] = scale*((uint32_t*)src)[0] + dc;
- ((uint32_t*)dst)[1] = scale*((uint32_t*)src)[1] + dc;
- ((uint32_t*)dst)[2] = scale*((uint32_t*)src)[2] + dc;
- ((uint32_t*)dst)[3] = scale*((uint32_t*)src)[3] + dc;
- if(scale) src += stride;
- dst += stride;
- }
- break;
- default: assert(0);
- }
-}
-
-static void decode_p_block(FourXContext *f, uint16_t *dst, uint16_t *src, int log2w, int log2h, int stride){
- const int index= size2index[log2h][log2w];
- const int h= 1<<log2h;
- int code= get_vlc2(&f->gb, block_type_vlc[index].table, BLOCK_TYPE_VLC_BITS, 1);
-
- assert(code>=0 && code<=6);
-
- if(code == 0){
- src += f->mv[ *f->bytestream++ ];
- mcdc(dst, src, log2w, h, stride, 1, 0);
- }else if(code == 1){
- log2h--;
- decode_p_block(f, dst , src , log2w, log2h, stride);
- decode_p_block(f, dst + (stride<<log2h), src + (stride<<log2h), log2w, log2h, stride);
- }else if(code == 2){
- log2w--;
- decode_p_block(f, dst , src , log2w, log2h, stride);
- decode_p_block(f, dst + (1<<log2w), src + (1<<log2w), log2w, log2h, stride);
- }else if(code == 4){
- src += f->mv[ *f->bytestream++ ];
- mcdc(dst, src, log2w, h, stride, 1, le2me_16(*f->wordstream++));
- }else if(code == 5){
- mcdc(dst, src, log2w, h, stride, 0, le2me_16(*f->wordstream++));
- }else if(code == 6){
- if(log2w){
- dst[0] = le2me_16(*f->wordstream++);
- dst[1] = le2me_16(*f->wordstream++);
- }else{
- dst[0 ] = le2me_16(*f->wordstream++);
- dst[stride] = le2me_16(*f->wordstream++);
- }
- }
-}
-
-static int get32(void *p){
- return le2me_32(*(uint32_t*)p);
-}
-
-static int decode_p_frame(FourXContext *f, uint8_t *buf, int length){
- int x, y;
- const int width= f->avctx->width;
- const int height= f->avctx->height;
- uint16_t *src= (uint16_t*)f->last_picture.data[0];
- uint16_t *dst= (uint16_t*)f->current_picture.data[0];
- const int stride= f->current_picture.linesize[0]>>1;
- const int bitstream_size= get32(buf+8);
- const int bytestream_size= get32(buf+16);
- const int wordstream_size= get32(buf+12);
-
- if(bitstream_size+ bytestream_size+ wordstream_size + 20 != length)
- printf("lengths %d %d %d %d\n", bitstream_size, bytestream_size, wordstream_size,
- bitstream_size+ bytestream_size+ wordstream_size - length);
-
- f->bitstream_buffer= av_fast_realloc(f->bitstream_buffer, &f->bitstream_buffer_size, bitstream_size + FF_INPUT_BUFFER_PADDING_SIZE);
- f->dsp.bswap_buf((uint32_t*)f->bitstream_buffer, (uint32_t*)(buf + 20), bitstream_size/4);
- init_get_bits(&f->gb, f->bitstream_buffer, 8*bitstream_size);
-
- f->wordstream= (uint16_t*)(buf + 20 + bitstream_size);
- f->bytestream= buf + 20 + bitstream_size + wordstream_size;
-
- init_mv(f);
-
- for(y=0; y<height; y+=8){
- for(x=0; x<width; x+=8){
- decode_p_block(f, dst + x, src + x, 3, 3, stride);
- }
- src += 8*stride;
- dst += 8*stride;
- }
-
- if(bitstream_size != (get_bits_count(&f->gb)+31)/32*4)
- printf(" %d %d %d bytes left\n",
- bitstream_size - (get_bits_count(&f->gb)+31)/32*4,
- bytestream_size - (f->bytestream - (buf + 20 + bitstream_size + wordstream_size)),
- wordstream_size - (((uint8_t*)f->wordstream) - (buf + 20 + bitstream_size))
- );
-
- return 0;
-}
-
-/**
- * decode block and dequantize.
- * Note this is allmost identical to mjpeg
- */
-static int decode_i_block(FourXContext *f, DCTELEM *block){
- int code, i, j, level, val;
-
- /* DC coef */
- val = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3);
- if (val>>4){
- printf("error dc run != 0\n");
- }
-
- if(val)
- val = get_xbits(&f->gb, val);
-
- val = val * dequant_table[0] + f->last_dc;
- f->last_dc =
- block[0] = val;
- /* AC coefs */
- i = 1;
- for(;;) {
- code = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3);
-
- /* EOB */
- if (code == 0)
- break;
- if (code == 0xf0) {
- i += 16;
- } else {
- level = get_xbits(&f->gb, code & 0xf);
- i += code >> 4;
- if (i >= 64) {
- printf("run %d oveflow\n", i);
- return 0;
- }
-
- j= ff_zigzag_direct[i];
- block[j] = level * dequant_table[j];
- i++;
- if (i >= 64)
- break;
- }
- }
-
- return 0;
-}
-
-static inline void idct_put(FourXContext *f, int x, int y){
- DCTELEM (*block)[64]= f->block;
- int stride= f->current_picture.linesize[0]>>1;
- int i;
- uint16_t *dst = ((uint16_t*)f->current_picture.data[0]) + y * stride + x;
-
- for(i=0; i<4; i++){
- block[i][0] += 0x80*8*8;
- idct(block[i]);
- }
-
- if(!(f->avctx->flags&CODEC_FLAG_GRAY)){
- for(i=4; i<6; i++) idct(block[i]);
- }
-
- for(y=0; y<8; y++){
- for(x=0; x<8; x++){
- DCTELEM *temp= block[(x>>2) + 2*(y>>2)] + 2*(x&3) + 2*8*(y&3); //FIXME optimize
- int cb= block[4][x + 8*y];
- int cr= block[5][x + 8*y];
- int cg= (cb + cr)>>1;
- int y;
-
- cb+=cb;
-
- y = temp[0];
- dst[0 ]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
- y = temp[1];
- dst[1 ]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
- y = temp[8];
- dst[ stride]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
- y = temp[9];
- dst[1+stride]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
- dst += 2;
- }
- dst += 2*stride - 2*8;
- }
-}
-
-static int decode_i_mb(FourXContext *f){
- int i;
-
- f->dsp.clear_blocks(f->block[0]);
-
- for(i=0; i<6; i++){
- if(decode_i_block(f, f->block[i]) < 0)
- return -1;
- }
-
- return 0;
-}
-
-static uint8_t *read_huffman_tables(FourXContext *f, uint8_t * const buf){
- int frequency[512];
- uint8_t flag[512];
- int up[512];
- uint8_t len_tab[257];
- int bits_tab[257];
- int start, end;
- uint8_t *ptr= buf;
- int j;
-
- memset(frequency, 0, sizeof(frequency));
- memset(up, -1, sizeof(up));
-
- start= *ptr++;
- end= *ptr++;
- for(;;){
- int i;
-
- for(i=start; i<=end; i++){
- frequency[i]= *ptr++;
-// printf("%d %d %d\n", start, end, frequency[i]);
- }
- start= *ptr++;
- if(start==0) break;
-
- end= *ptr++;
- }
- frequency[256]=1;
-
- while((ptr - buf)&3) ptr++; // 4byte align
-
-// for(j=0; j<16; j++)
-// printf("%2X", ptr[j]);
-
- for(j=257; j<512; j++){
- int min_freq[2]= {256*256, 256*256};
- int smallest[2]= {0, 0};
- int i;
- for(i=0; i<j; i++){
- if(frequency[i] == 0) continue;
- if(frequency[i] < min_freq[1]){
- if(frequency[i] < min_freq[0]){
- min_freq[1]= min_freq[0]; smallest[1]= smallest[0];
- min_freq[0]= frequency[i];smallest[0]= i;
- }else{
- min_freq[1]= frequency[i];smallest[1]= i;
- }
- }
- }
- if(min_freq[1] == 256*256) break;
-
- frequency[j]= min_freq[0] + min_freq[1];
- flag[ smallest[0] ]= 0;
- flag[ smallest[1] ]= 1;
- up[ smallest[0] ]=
- up[ smallest[1] ]= j;
- frequency[ smallest[0] ]= frequency[ smallest[1] ]= 0;
- }
-
- for(j=0; j<257; j++){
- int node;
- int len=0;
- int bits=0;
-
- for(node= j; up[node] != -1; node= up[node]){
- bits += flag[node]<<len;
- len++;
- if(len > 31) printf("vlc length overflow\n"); //can this happen at all ?
- }
-
- bits_tab[j]= bits;
- len_tab[j]= len;
- }
-
- init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257,
- len_tab , 1, 1,
- bits_tab, 4, 4);
-
- return ptr;
-}
-
-static int decode_i_frame(FourXContext *f, uint8_t *buf, int length){
- int x, y;
- const int width= f->avctx->width;
- const int height= f->avctx->height;
- uint16_t *dst= (uint16_t*)f->current_picture.data[0];
- const int stride= f->current_picture.linesize[0]>>1;
- const int bitstream_size= get32(buf);
- const int token_count __attribute__((unused)) = get32(buf + bitstream_size + 8);
- int prestream_size= 4*get32(buf + bitstream_size + 4);
- uint8_t *prestream= buf + bitstream_size + 12;
-
- if(prestream_size + bitstream_size + 12 != length)
- fprintf(stderr, "size missmatch %d %d %d\n", prestream_size, bitstream_size, length);
-
- prestream= read_huffman_tables(f, prestream);
-
- init_get_bits(&f->gb, buf + 4, 8*bitstream_size);
-
- prestream_size= length + buf - prestream;
-
- f->bitstream_buffer= av_fast_realloc(f->bitstream_buffer, &f->bitstream_buffer_size, prestream_size + FF_INPUT_BUFFER_PADDING_SIZE);
- f->dsp.bswap_buf((uint32_t*)f->bitstream_buffer, (uint32_t*)prestream, prestream_size/4);
- init_get_bits(&f->pre_gb, f->bitstream_buffer, 8*prestream_size);
-
- f->last_dc= 0*128*8*8;
-
- for(y=0; y<height; y+=16){
- for(x=0; x<width; x+=16){
- if(decode_i_mb(f) < 0)
- return -1;
-
- idct_put(f, x, y);
- }
- dst += 16*stride;
- }
-
- if(get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3) != 256)
- printf("end missmatch\n");
-
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- FourXContext * const f = avctx->priv_data;
- AVFrame *picture = data;
- AVFrame *p, temp;
- int i, frame_4cc, frame_size;
-
- *data_size = 0;
-
- /* special case for last picture */
- if (buf_size == 0) {
- return 0;
- }
-
- frame_4cc= get32(buf);
- if(buf_size != get32(buf+4)+8){
- fprintf(stderr, "size missmatch %d %d\n", buf_size, get32(buf+4));
- }
-
- if(frame_4cc == ff_get_fourcc("cfrm")){
- int free_index=-1;
- const int data_size= buf_size - 20;
- const int id= get32(buf+12);
- const int whole_size= get32(buf+16);
- CFrameBuffer *cfrm;
-
- for(i=0; i<CFRAME_BUFFER_COUNT; i++){
- if(f->cfrm[i].id && f->cfrm[i].id < avctx->frame_number)
- printf("lost c frame %d\n", f->cfrm[i].id);
- }
-
- for(i=0; i<CFRAME_BUFFER_COUNT; i++){
- if(f->cfrm[i].id == id) break;
- if(f->cfrm[i].size == 0 ) free_index= i;
- }
-
- if(i>=CFRAME_BUFFER_COUNT){
- i= free_index;
- f->cfrm[i].id= id;
- }
- cfrm= &f->cfrm[i];
-
- cfrm->data= av_fast_realloc(cfrm->data, &cfrm->allocated_size, cfrm->size + data_size + FF_INPUT_BUFFER_PADDING_SIZE);
-
- memcpy(cfrm->data + cfrm->size, buf+20, data_size);
- cfrm->size += data_size;
-
- if(cfrm->size >= whole_size){
- buf= cfrm->data;
- frame_size= cfrm->size;
-
- if(id != avctx->frame_number){
- printf("cframe id missmatch %d %d\n", id, avctx->frame_number);
- }
-
- cfrm->size= cfrm->id= 0;
- frame_4cc= ff_get_fourcc("pfrm");
- }else
- return buf_size;
- }else{
- buf= buf + 12;
- frame_size= buf_size - 12;
- }
-
- temp= f->current_picture;
- f->current_picture= f->last_picture;
- f->last_picture= temp;
-
- p= &f->current_picture;
- avctx->coded_frame= p;
-
- avctx->flags |= CODEC_FLAG_EMU_EDGE; // alternatively we would have to use our own buffer management
-
- if(p->data[0])
- avctx->release_buffer(avctx, p);
-
- p->reference= 1;
- if(avctx->get_buffer(avctx, p) < 0){
- fprintf(stderr, "get_buffer() failed\n");
- return -1;
- }
-
- if(frame_4cc == ff_get_fourcc("ifrm")){
- p->pict_type= I_TYPE;
- if(decode_i_frame(f, buf, frame_size) < 0)
- return -1;
- }else if(frame_4cc == ff_get_fourcc("pfrm")){
- p->pict_type= P_TYPE;
- if(decode_p_frame(f, buf, frame_size) < 0)
- return -1;
- }else if(frame_4cc == ff_get_fourcc("snd_")){
- printf("ignoring snd_ chunk length:%d\n", buf_size);
- }else{
- printf("ignoring unknown chunk length:%d\n", buf_size);
- }
-
-#if 0
-for(i=0; i<20; i++){
- printf("%2X %c ", buf[i], clip(buf[i],16,126));
-}
-#endif
-
- p->key_frame= p->pict_type == I_TYPE;
-
- *picture= *p;
- *data_size = sizeof(AVPicture);
-
- emms_c();
-
- return buf_size;
-}
-
-
-static void common_init(AVCodecContext *avctx){
- FourXContext * const f = avctx->priv_data;
-
- dsputil_init(&f->dsp, avctx);
-
- f->avctx= avctx;
-}
-
-static int decode_init(AVCodecContext *avctx){
- FourXContext * const f = avctx->priv_data;
-
- common_init(avctx);
- init_vlcs(f);
-
- avctx->pix_fmt= PIX_FMT_RGB565;
-
- return 0;
-}
-
-
-static int decode_end(AVCodecContext *avctx){
- FourXContext * const f = avctx->priv_data;
- int i;
-
- av_freep(&f->bitstream_buffer);
- f->bitstream_buffer_size=0;
- for(i=0; i<CFRAME_BUFFER_COUNT; i++){
- av_freep(&f->cfrm[i].data);
- f->cfrm[i].allocated_size= 0;
- }
- free_vlc(&f->pre_vlc);
-
- avcodec_default_free_buffers(avctx);
-
- return 0;
-}
-
-AVCodec fourxm_decoder = {
- "4xm",
- CODEC_TYPE_VIDEO,
- CODEC_ID_4XM,
- sizeof(FourXContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- /*CODEC_CAP_DR1,*/
-};
-
projects / synfig.git / blobdiff