--- /dev/null
+/*
+ * huffyuv codec for libavcodec
+ *
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ *
+ * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
+ * the algorithm used
+ */
+
+#include "common.h"
+#include "avcodec.h"
+#include "dsputil.h"
+
+#ifndef MAX_INT64
+#define MAX_INT64 9223372036854775807LL
+#endif
+
+#define VLC_BITS 11
+
+typedef enum Predictor{
+ LEFT= 0,
+ PLANE,
+ MEDIAN,
+} Predictor;
+
+typedef struct HYuvContext{
+ AVCodecContext *avctx;
+ Predictor predictor;
+ GetBitContext gb;
+ PutBitContext pb;
+ int interlaced;
+ int decorrelate;
+ int bitstream_bpp;
+ int version;
+ int yuy2; //use yuy2 instead of 422P
+ int bgr32; //use bgr32 instead of bgr24
+ int width, height;
+ int flags;
+ int picture_number;
+ int linesize[3];
+ uint8_t __align8 temp[3][2500];
+ uint64_t stats[3][256];
+ uint8_t len[3][256];
+ uint32_t bits[3][256];
+ VLC vlc[3];
+ uint8_t __align8 *picture[3];
+ uint8_t __align8 bitstream_buffer[1024*1024*3]; //FIXME dynamic alloc or some other solution
+ DSPContext dsp;
+}HYuvContext;
+
+static inline void bswap_buf(uint32_t *dst, uint32_t *src, int w){
+ int i;
+
+ for(i=0; i+8<=w; i+=8){
+ dst[i+0]= bswap_32(src[i+0]);
+ dst[i+1]= bswap_32(src[i+1]);
+ dst[i+2]= bswap_32(src[i+2]);
+ dst[i+3]= bswap_32(src[i+3]);
+ dst[i+4]= bswap_32(src[i+4]);
+ dst[i+5]= bswap_32(src[i+5]);
+ dst[i+6]= bswap_32(src[i+6]);
+ dst[i+7]= bswap_32(src[i+7]);
+ }
+ for(;i<w; i++){
+ dst[i+0]= bswap_32(src[i+0]);
+ }
+}
+
+static inline int add_left_prediction(uint8_t *dst, uint8_t *src, int w, int acc){
+ int i;
+
+ for(i=0; i<w-1; i++){
+ acc+= src[i];
+ dst[i]= acc;
+ i++;
+ acc+= src[i];
+ dst[i]= acc;
+ }
+
+ for(; i<w; i++){
+ acc+= src[i];
+ dst[i]= acc;
+ }
+
+ return acc;
+}
+
+static inline void add_median_prediction(uint8_t *dst, uint8_t *src1, uint8_t *diff, int w, int *left, int *left_top){
+ int i;
+ uint8_t l, lt;
+
+ l= *left;
+ lt= *left_top;
+
+ for(i=0; i<w; i++){
+ l= mid_pred(l, src1[i], (l + src1[i] - lt)&0xFF) + diff[i];
+ lt= src1[i];
+ dst[i]= l;
+ }
+
+ *left= l;
+ *left_top= lt;
+}
+//FIXME optimize
+static inline void sub_median_prediction(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w, int *left, int *left_top){
+ int i;
+ uint8_t l, lt;
+
+ l= *left;
+ lt= *left_top;
+
+ for(i=0; i<w; i++){
+ const int pred= mid_pred(l, src1[i], (l + src1[i] - lt)&0xFF);
+ lt= src1[i];
+ l= src2[i];
+ dst[i]= l - pred;
+ }
+
+ *left= l;
+ *left_top= lt;
+}
+
+
+static inline void add_left_prediction_bgr32(uint8_t *dst, uint8_t *src, int w, int *red, int *green, int *blue){
+ int i;
+ int r,g,b;
+ r= *red;
+ g= *green;
+ b= *blue;
+
+ for(i=0; i<w; i++){
+ b+= src[4*i+0];
+ g+= src[4*i+1];
+ r+= src[4*i+2];
+
+ dst[4*i+0]= b;
+ dst[4*i+1]= g;
+ dst[4*i+2]= r;
+ }
+
+ *red= r;
+ *green= g;
+ *blue= b;
+}
+
+//FIXME optimize
+static inline int sub_left_prediction(uint8_t *dst, uint8_t *src, int w, int left){
+ int i;
+ for(i=0; i<w; i++){
+ const int temp= src[i];
+ dst[i]= temp - left;
+ left= temp;
+ }
+ return left;
+}
+
+static void read_len_table(uint8_t *dst, GetBitContext *gb){
+ int i, val, repeat;
+
+ for(i=0; i<256;){
+ repeat= get_bits(gb, 3);
+ val = get_bits(gb, 5);
+ if(repeat==0)
+ repeat= get_bits(gb, 8);
+//printf("%d %d\n", val, repeat);
+ while (repeat--)
+ dst[i++] = val;
+ }
+}
+
+static int generate_bits_table(uint32_t *dst, uint8_t *len_table){
+ int len, index;
+ uint32_t bits=0;
+
+ for(len=32; len>0; len--){
+ int bit= 1<<(32-len);
+ for(index=0; index<256; index++){
+ if(len_table[index]==len){
+ if(bits & (bit-1)){
+ fprintf(stderr, "Error generating huffman table\n");
+ return -1;
+ }
+ dst[index]= bits>>(32-len);
+ bits+= bit;
+ }
+ }
+ }
+ return 0;
+}
+
+static void generate_len_table(uint8_t *dst, uint64_t *stats, int size){
+ uint64_t counts[2*size];
+ int up[2*size];
+ int offset, i, next;
+
+ for(offset=1; ; offset<<=1){
+ for(i=0; i<size; i++){
+ counts[i]= stats[i] + offset - 1;
+ }
+
+ for(next=size; next<size*2; next++){
+ uint64_t min1, min2;
+ int min1_i, min2_i;
+
+ min1=min2= INT64_MAX;
+ min1_i= min2_i=-1;
+
+ for(i=0; i<next; i++){
+ if(min2 > counts[i]){
+ if(min1 > counts[i]){
+ min2= min1;
+ min2_i= min1_i;
+ min1= counts[i];
+ min1_i= i;
+ }else{
+ min2= counts[i];
+ min2_i= i;
+ }
+ }
+ }
+
+ if(min2==INT64_MAX) break;
+
+ counts[next]= min1 + min2;
+ counts[min1_i]=
+ counts[min2_i]= MAX_INT64;
+ up[min1_i]=
+ up[min2_i]= next;
+ up[next]= -1;
+ }
+
+ for(i=0; i<size; i++){
+ int len;
+ int index=i;
+
+ for(len=0; up[index] != -1; len++)
+ index= up[index];
+
+ if(len > 32) break;
+
+ dst[i]= len;
+ }
+ if(i==size) break;
+ }
+}
+
+static int read_huffman_tables(HYuvContext *s, uint8_t *src, int length){
+ GetBitContext gb;
+ int i;
+
+ init_get_bits(&gb, src, length);
+
+ for(i=0; i<3; i++){
+ read_len_table(s->len[i], &gb);
+
+ if(generate_bits_table(s->bits[i], s->len[i])<0){
+ return -1;
+ }
+#if 0
+for(j=0; j<256; j++){
+printf("%6X, %2d, %3d\n", s->bits[i][j], s->len[i][j], j);
+}
+#endif
+ init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4);
+ }
+
+ return 0;
+}
+
+static int read_old_huffman_tables(HYuvContext *s){
+#if 0
+ GetBitContext gb;
+ int i;
+
+ init_get_bits(&gb, classic_shift_luma, sizeof(classic_shift_luma));
+ read_len_table(s->len[0], &gb);
+ init_get_bits(&gb, classic_shift_chroma, sizeof(classic_shift_chroma));
+ read_len_table(s->len[1], &gb);
+
+ for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma [i];
+ for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i];
+
+ if(s->bitstream_bpp >= 24){
+ memcpy(s->bits[1], s->bits[0], 256*sizeof(uint32_t));
+ memcpy(s->len[1] , s->len [0], 256*sizeof(uint8_t));
+ }
+ memcpy(s->bits[2], s->bits[1], 256*sizeof(uint32_t));
+ memcpy(s->len[2] , s->len [1], 256*sizeof(uint8_t));
+
+ for(i=0; i<3; i++)
+ init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4);
+
+ return 0;
+#else
+ fprintf(stderr, "v1 huffyuv is not supported \n");
+ return -1;
+#endif
+}
+
+static int decode_init(AVCodecContext *avctx)
+{
+ HYuvContext *s = avctx->priv_data;
+ int width, height, y_size, c_size, stride;
+
+ s->avctx= avctx;
+ s->flags= avctx->flags;
+
+ dsputil_init(&s->dsp, avctx->dsp_mask);
+
+ width= s->width= avctx->width;
+ height= s->height= avctx->height;
+s->bgr32=1;
+ assert(width && height);
+//if(avctx->extradata)
+// printf("extradata:%X, extradata_size:%d\n", *(uint32_t*)avctx->extradata, avctx->extradata_size);
+ if(avctx->extradata_size){
+ if(avctx->bits_per_sample&7)
+ s->version=1; // do such files exist at all?
+ else
+ s->version=2;
+ }else
+ s->version=0;
+
+ if(s->version==2){
+ int method;
+
+ method= ((uint8_t*)avctx->extradata)[0];
+ s->decorrelate= method&64 ? 1 : 0;
+ s->predictor= method&63;
+ s->bitstream_bpp= ((uint8_t*)avctx->extradata)[1];
+ if(s->bitstream_bpp==0)
+ s->bitstream_bpp= avctx->bits_per_sample&~7;
+
+ if(read_huffman_tables(s, ((uint8_t*)avctx->extradata)+4, avctx->extradata_size) < 0)
+ return -1;
+ }else{
+ switch(avctx->bits_per_sample&7){
+ case 1:
+ s->predictor= LEFT;
+ s->decorrelate= 0;
+ break;
+ case 2:
+ s->predictor= LEFT;
+ s->decorrelate= 1;
+ break;
+ case 3:
+ s->predictor= PLANE;
+ s->decorrelate= avctx->bits_per_sample >= 24;
+ break;
+ case 4:
+ s->predictor= MEDIAN;
+ s->decorrelate= 0;
+ break;
+ default:
+ s->predictor= LEFT; //OLD
+ s->decorrelate= 0;
+ break;
+ }
+ s->bitstream_bpp= avctx->bits_per_sample & ~7;
+
+ if(read_old_huffman_tables(s) < 0)
+ return -1;
+ }
+
+ s->interlaced= height > 288;
+
+ c_size= 0;
+ switch(s->bitstream_bpp){
+ case 12:
+ avctx->pix_fmt = PIX_FMT_YUV420P;
+ stride= (width+15)&~15;
+ c_size= height*stride/4;
+ break;
+ case 16:
+ if(s->yuy2){
+ avctx->pix_fmt = PIX_FMT_YUV422;
+ stride= (width*2+15)&~15;
+ }else{
+ avctx->pix_fmt = PIX_FMT_YUV422P;
+ stride= (width+15)&~15;
+ c_size= height*stride/2;
+ }
+ break;
+ case 24:
+ case 32:
+ if(s->bgr32){
+ avctx->pix_fmt = PIX_FMT_BGRA32;
+ stride= (width*4+15)&~15;
+ }else{
+ avctx->pix_fmt = PIX_FMT_BGR24;
+ stride= (width*3+15)&~15;
+ }
+ break;
+ default:
+ assert(0);
+ stride=0; //gcc fix
+ }
+
+ y_size= height*stride;
+
+ s->linesize[0]= stride;
+ s->picture[0]= av_mallocz(y_size);
+
+ if(c_size){
+ s->picture[1]= av_mallocz(c_size);
+ s->picture[2]= av_mallocz(c_size);
+ s->linesize[1]= s->linesize[2]= stride/2;
+
+ memset(s->picture[1], 128, c_size);
+ memset(s->picture[2], 128, c_size);
+ }
+
+// printf("pred:%d bpp:%d hbpp:%d il:%d\n", s->predictor, s->bitstream_bpp, avctx->bits_per_sample, s->interlaced);
+
+ return 0;
+}
+
+static void store_table(HYuvContext *s, uint8_t *len){
+ int i;
+ int index= s->avctx->extradata_size;
+
+ for(i=0; i<256;){
+ int cur=i;
+ int val= len[i];
+ int repeat;
+
+ for(; i<256 && len[i]==val; i++);
+
+ repeat= i - cur;
+
+ if(repeat>7){
+ ((uint8_t*)s->avctx->extradata)[index++]= val;
+ ((uint8_t*)s->avctx->extradata)[index++]= repeat;
+ }else{
+ ((uint8_t*)s->avctx->extradata)[index++]= val | (repeat<<5);
+ }
+ }
+
+ s->avctx->extradata_size= index;
+}
+
+static int encode_init(AVCodecContext *avctx)
+{
+ HYuvContext *s = avctx->priv_data;
+ int i, j, width, height;
+
+ s->avctx= avctx;
+ s->flags= avctx->flags;
+
+ dsputil_init(&s->dsp, avctx->dsp_mask);
+
+ width= s->width= avctx->width;
+ height= s->height= avctx->height;
+
+ assert(width && height);
+
+ avctx->extradata= av_mallocz(1024*10);
+ avctx->stats_out= av_mallocz(1024*10);
+ s->version=2;
+
+ switch(avctx->pix_fmt){
+ case PIX_FMT_YUV422P:
+ s->bitstream_bpp= 16;
+ break;
+ default:
+ fprintf(stderr, "format not supported\n");
+ return -1;
+ }
+ avctx->bits_per_sample= s->bitstream_bpp;
+ s->decorrelate= s->bitstream_bpp >= 24;
+ s->predictor= avctx->prediction_method;
+
+ ((uint8_t*)avctx->extradata)[0]= s->predictor;
+ ((uint8_t*)avctx->extradata)[1]= s->bitstream_bpp;
+ ((uint8_t*)avctx->extradata)[2]=
+ ((uint8_t*)avctx->extradata)[3]= 0;
+ s->avctx->extradata_size= 4;
+
+ if(avctx->stats_in){
+ char *p= avctx->stats_in;
+
+ for(i=0; i<3; i++)
+ for(j=0; j<256; j++)
+ s->stats[i][j]= 1;
+
+ for(;;){
+ for(i=0; i<3; i++){
+ char *next;
+
+ for(j=0; j<256; j++){
+ s->stats[i][j]+= strtol(p, &next, 0);
+ if(next==p) return -1;
+ p=next;
+ }
+ }
+ if(p[0]==0 || p[1]==0 || p[2]==0) break;
+ }
+ }else{
+ for(i=0; i<3; i++)
+ for(j=0; j<256; j++){
+ int d= FFMIN(j, 256-j);
+
+ s->stats[i][j]= 100000000/(d+1);
+ }
+ }
+
+ for(i=0; i<3; i++){
+ generate_len_table(s->len[i], s->stats[i], 256);
+
+ if(generate_bits_table(s->bits[i], s->len[i])<0){
+ return -1;
+ }
+
+ store_table(s, s->len[i]);
+ }
+
+ for(i=0; i<3; i++)
+ for(j=0; j<256; j++)
+ s->stats[i][j]= 0;
+
+ s->interlaced= height > 288;
+
+// printf("pred:%d bpp:%d hbpp:%d il:%d\n", s->predictor, s->bitstream_bpp, avctx->bits_per_sample, s->interlaced);
+
+ s->picture_number=0;
+
+ return 0;
+}
+
+static void decode_422_bitstream(HYuvContext *s, int count){
+ int i;
+
+ count/=2;
+
+ for(i=0; i<count; i++){
+ s->temp[0][2*i ]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
+ s->temp[1][ i ]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
+ s->temp[0][2*i+1]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
+ s->temp[2][ i ]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
+ }
+}
+
+static void encode_422_bitstream(HYuvContext *s, int count){
+ int i;
+
+ count/=2;
+ if(s->flags&CODEC_FLAG_PASS1){
+ for(i=0; i<count; i++){
+ s->stats[0][ s->temp[0][2*i ] ]++;
+ s->stats[1][ s->temp[1][ i ] ]++;
+ s->stats[0][ s->temp[0][2*i+1] ]++;
+ s->stats[2][ s->temp[2][ i ] ]++;
+ }
+ }else{
+ for(i=0; i<count; i++){
+ put_bits(&s->pb, s->len[0][ s->temp[0][2*i ] ], s->bits[0][ s->temp[0][2*i ] ]);
+ put_bits(&s->pb, s->len[1][ s->temp[1][ i ] ], s->bits[1][ s->temp[1][ i ] ]);
+ put_bits(&s->pb, s->len[0][ s->temp[0][2*i+1] ], s->bits[0][ s->temp[0][2*i+1] ]);
+ put_bits(&s->pb, s->len[2][ s->temp[2][ i ] ], s->bits[2][ s->temp[2][ i ] ]);
+ }
+ }
+}
+
+static void decode_bgr_bitstream(HYuvContext *s, int count){
+ int i;
+
+ if(s->decorrelate){
+ if(s->bitstream_bpp==24){
+ for(i=0; i<count; i++){
+ s->temp[0][4*i+1]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
+ s->temp[0][4*i ]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) + s->temp[0][4*i+1];
+ s->temp[0][4*i+2]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) + s->temp[0][4*i+1];
+ }
+ }else{
+ for(i=0; i<count; i++){
+ s->temp[0][4*i+1]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
+ s->temp[0][4*i ]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) + s->temp[0][4*i+1];
+ s->temp[0][4*i+2]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) + s->temp[0][4*i+1];
+ get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); //?!
+ }
+ }
+ }else{
+ if(s->bitstream_bpp==24){
+ for(i=0; i<count; i++){
+ s->temp[0][4*i ]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
+ s->temp[0][4*i+1]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
+ s->temp[0][4*i+2]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
+ }
+ }else{
+ for(i=0; i<count; i++){
+ s->temp[0][4*i ]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
+ s->temp[0][4*i+1]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
+ s->temp[0][4*i+2]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
+ get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); //?!
+ }
+ }
+ }
+}
+
+static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size){
+ HYuvContext *s = avctx->priv_data;
+ const int width= s->width;
+ const int width2= s->width>>1;
+ const int height= s->height;
+ const int fake_ystride= s->interlaced ? s->linesize[0]*2 : s->linesize[0];
+ const int fake_ustride= s->interlaced ? s->linesize[1]*2 : s->linesize[1];
+ const int fake_vstride= s->interlaced ? s->linesize[2]*2 : s->linesize[2];
+ int i;
+
+ AVPicture *picture = data;
+
+ *data_size = 0;
+
+ /* no supplementary picture */
+ if (buf_size == 0)
+ return 0;
+
+ bswap_buf((uint32_t*)s->bitstream_buffer, (uint32_t*)buf, buf_size/4);
+
+ init_get_bits(&s->gb, s->bitstream_buffer, buf_size);
+
+ if(s->bitstream_bpp<24){
+ int y;
+ int lefty, leftu, leftv;
+ int lefttopy, lefttopu, lefttopv;
+
+ if(s->yuy2){
+ s->picture[0][3]= get_bits(&s->gb, 8);
+ s->picture[0][2]= get_bits(&s->gb, 8);
+ s->picture[0][1]= get_bits(&s->gb, 8);
+ s->picture[0][0]= get_bits(&s->gb, 8);
+
+ fprintf(stderr, "YUY2 output isnt implemenetd yet\n");
+ return -1;
+ }else{
+
+ leftv= s->picture[2][0]= get_bits(&s->gb, 8);
+ lefty= s->picture[0][1]= get_bits(&s->gb, 8);
+ leftu= s->picture[1][0]= get_bits(&s->gb, 8);
+ s->picture[0][0]= get_bits(&s->gb, 8);
+
+ switch(s->predictor){
+ case LEFT:
+ case PLANE:
+ decode_422_bitstream(s, width-2);
+ lefty= add_left_prediction(s->picture[0] + 2, s->temp[0], width-2, lefty);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ leftu= add_left_prediction(s->picture[1] + 1, s->temp[1], width2-1, leftu);
+ leftv= add_left_prediction(s->picture[2] + 1, s->temp[2], width2-1, leftv);
+ }
+
+ for(y=1; y<s->height; y++){
+ uint8_t *ydst, *udst, *vdst;
+ decode_422_bitstream(s, width);
+
+ ydst= s->picture[0] + s->linesize[0]*y;
+ udst= s->picture[1] + s->linesize[1]*y;
+ vdst= s->picture[2] + s->linesize[2]*y;
+
+ lefty= add_left_prediction(ydst, s->temp[0], width, lefty);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ leftu= add_left_prediction(udst, s->temp[1], width2, leftu);
+ leftv= add_left_prediction(vdst, s->temp[2], width2, leftv);
+ }
+ if(s->predictor == PLANE){
+ if(y>s->interlaced){
+ s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ s->dsp.add_bytes(udst, udst - fake_ustride, width2);
+ s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);
+ }
+ }
+ }
+ }
+ break;
+ case MEDIAN:
+ /* first line except first 2 pixels is left predicted */
+ decode_422_bitstream(s, width-2);
+ lefty= add_left_prediction(s->picture[0] + 2, s->temp[0], width-2, lefty);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ leftu= add_left_prediction(s->picture[1] + 1, s->temp[1], width2-1, leftu);
+ leftv= add_left_prediction(s->picture[2] + 1, s->temp[2], width2-1, leftv);
+ }
+
+ y=1;
+
+ /* second line is left predicted for interlaced case */
+ if(s->interlaced){
+ decode_422_bitstream(s, width);
+ lefty= add_left_prediction(s->picture[0] + s->linesize[0], s->temp[0], width, lefty);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ leftu= add_left_prediction(s->picture[1] + s->linesize[2], s->temp[1], width2, leftu);
+ leftv= add_left_prediction(s->picture[2] + s->linesize[1], s->temp[2], width2, leftv);
+ }
+ y++;
+ }
+
+ /* next 4 pixels are left predicted too */
+ decode_422_bitstream(s, 4);
+ lefty= add_left_prediction(s->picture[0] + fake_ystride, s->temp[0], 4, lefty);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ leftu= add_left_prediction(s->picture[1] + fake_ustride, s->temp[1], 2, leftu);
+ leftv= add_left_prediction(s->picture[2] + fake_vstride, s->temp[2], 2, leftv);
+ }
+
+ /* next line except the first 4 pixels is median predicted */
+ lefttopy= s->picture[0][3];
+ decode_422_bitstream(s, width-4);
+ add_median_prediction(s->picture[0] + fake_ystride+4, s->picture[0]+4, s->temp[0], width-4, &lefty, &lefttopy);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ lefttopu= s->picture[1][1];
+ lefttopv= s->picture[2][1];
+ add_median_prediction(s->picture[1] + fake_ustride+2, s->picture[1]+2, s->temp[1], width2-2, &leftu, &lefttopu);
+ add_median_prediction(s->picture[2] + fake_vstride+2, s->picture[2]+2, s->temp[2], width2-2, &leftv, &lefttopv);
+ }
+ y++;
+
+ for(; y<height; y++){
+ uint8_t *ydst, *udst, *vdst;
+ decode_422_bitstream(s, width);
+
+ ydst= s->picture[0] + s->linesize[0]*y;
+ udst= s->picture[1] + s->linesize[1]*y;
+ vdst= s->picture[2] + s->linesize[2]*y;
+
+ add_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
+ if(!(s->flags&CODEC_FLAG_GRAY)){
+ add_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
+ add_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
+ }
+ }
+ break;
+ }
+ }
+ }else{
+ int y;
+ int leftr, leftg, leftb;
+ const int last_line= (height-1)*s->linesize[0];
+
+ if(s->bitstream_bpp==32){
+ s->picture[0][last_line+3]= get_bits(&s->gb, 8);
+ leftr= s->picture[0][last_line+2]= get_bits(&s->gb, 8);
+ leftg= s->picture[0][last_line+1]= get_bits(&s->gb, 8);
+ leftb= s->picture[0][last_line+0]= get_bits(&s->gb, 8);
+ }else{
+ leftr= s->picture[0][last_line+2]= get_bits(&s->gb, 8);
+ leftg= s->picture[0][last_line+1]= get_bits(&s->gb, 8);
+ leftb= s->picture[0][last_line+0]= get_bits(&s->gb, 8);
+ skip_bits(&s->gb, 8);
+ }
+
+ if(s->bgr32){
+ switch(s->predictor){
+ case LEFT:
+ case PLANE:
+ decode_bgr_bitstream(s, width-1);
+ add_left_prediction_bgr32(s->picture[0] + last_line+4, s->temp[0], width-1, &leftr, &leftg, &leftb);
+
+ for(y=s->height-2; y>=0; y--){ //yes its stored upside down
+ decode_bgr_bitstream(s, width);
+
+ add_left_prediction_bgr32(s->picture[0] + s->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb);
+ if(s->predictor == PLANE){
+ if((y&s->interlaced)==0){
+ s->dsp.add_bytes(s->picture[0] + s->linesize[0]*y,
+ s->picture[0] + s->linesize[0]*y + fake_ystride, fake_ystride);
+ }
+ }
+ }
+ break;
+ default:
+ fprintf(stderr, "prediction type not supported!\n");
+ }
+ }else{
+
+ fprintf(stderr, "BGR24 output isnt implemenetd yet\n");
+ return -1;
+ }
+ }
+ emms_c();
+
+ for(i=0;i<3;i++) {
+ picture->data[i] = s->picture[i];
+ picture->linesize[i]= s->linesize[i];
+ }
+
+ *data_size = sizeof(AVPicture);
+
+ return (get_bits_count(&s->gb)+7)>>3;
+}
+
+static int decode_end(AVCodecContext *avctx)
+{
+ HYuvContext *s = avctx->priv_data;
+ int i;
+
+ for(i=0; i<3; i++){
+ av_freep(&s->picture[i]);
+ free_vlc(&s->vlc[i]);
+ }
+
+ return 0;
+}
+
+static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
+ HYuvContext *s = avctx->priv_data;
+ AVPicture *pict = data;
+ const int width= s->width;
+ const int width2= s->width>>1;
+ const int height= s->height;
+ const int fake_ystride= s->interlaced ? pict->linesize[0]*2 : pict->linesize[0];
+ const int fake_ustride= s->interlaced ? pict->linesize[1]*2 : pict->linesize[1];
+ const int fake_vstride= s->interlaced ? pict->linesize[2]*2 : pict->linesize[2];
+ int i, size;
+
+ init_put_bits(&s->pb, buf, buf_size, NULL, NULL);
+
+ for(i=0; i<3; i++){
+ s->picture[i]= pict->data[i];
+ s->linesize[i]= pict->linesize[i];
+ }
+
+ if(avctx->pix_fmt == PIX_FMT_YUV422P){
+ int lefty, leftu, leftv, y;
+
+ put_bits(&s->pb, 8, leftv= s->picture[2][0]);
+ put_bits(&s->pb, 8, lefty= s->picture[0][1]);
+ put_bits(&s->pb, 8, leftu= s->picture[1][0]);
+ put_bits(&s->pb, 8, s->picture[0][0]);
+
+ lefty= sub_left_prediction(s->temp[0], s->picture[0]+2, width-2 , lefty);
+ leftu= sub_left_prediction(s->temp[1], s->picture[1]+1, width2-1, leftu);
+ leftv= sub_left_prediction(s->temp[2], s->picture[2]+1, width2-1, leftv);
+
+ encode_422_bitstream(s, width-2);
+
+ if(s->predictor==MEDIAN){
+ int lefttopy, lefttopu, lefttopv;
+ y=1;
+ if(s->interlaced){
+ lefty= sub_left_prediction(s->temp[0], s->picture[0]+s->linesize[0], width , lefty);
+ leftu= sub_left_prediction(s->temp[1], s->picture[1]+s->linesize[1], width2, leftu);
+ leftv= sub_left_prediction(s->temp[2], s->picture[2]+s->linesize[2], width2, leftv);
+
+ encode_422_bitstream(s, width);
+ y++;
+ }
+
+ lefty= sub_left_prediction(s->temp[0], s->picture[0]+fake_ystride, 4, lefty);
+ leftu= sub_left_prediction(s->temp[1], s->picture[1]+fake_ystride, 2, leftu);
+ leftv= sub_left_prediction(s->temp[2], s->picture[2]+fake_ystride, 2, leftv);
+
+ encode_422_bitstream(s, 4);
+
+ lefttopy= s->picture[0][3];
+ lefttopu= s->picture[1][1];
+ lefttopv= s->picture[2][1];
+ sub_median_prediction(s->temp[0], s->picture[0]+4, s->picture[0] + fake_ystride+4, width-4 , &lefty, &lefttopy);
+ sub_median_prediction(s->temp[1], s->picture[1]+2, s->picture[1] + fake_ustride+2, width2-2, &leftu, &lefttopu);
+ sub_median_prediction(s->temp[2], s->picture[2]+2, s->picture[2] + fake_vstride+2, width2-2, &leftv, &lefttopv);
+ encode_422_bitstream(s, width-4);
+ y++;
+
+ for(; y<height; y++){
+ uint8_t *ydst, *udst, *vdst;
+
+ ydst= s->picture[0] + s->linesize[0]*y;
+ udst= s->picture[1] + s->linesize[1]*y;
+ vdst= s->picture[2] + s->linesize[2]*y;
+
+ sub_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
+ sub_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);
+ sub_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);
+
+ encode_422_bitstream(s, width);
+ }
+ }else{
+ for(y=1; y<height; y++){
+ uint8_t *ydst, *udst, *vdst;
+
+ ydst= s->picture[0] + s->linesize[0]*y;
+ udst= s->picture[1] + s->linesize[1]*y;
+ vdst= s->picture[2] + s->linesize[2]*y;
+
+ if(s->predictor == PLANE && s->interlaced < y){
+ s->dsp.diff_bytes(s->temp[0], ydst, ydst - fake_ystride, width);
+ s->dsp.diff_bytes(s->temp[1], udst, udst - fake_ustride, width2);
+ s->dsp.diff_bytes(s->temp[2], vdst, vdst - fake_vstride, width2);
+
+ lefty= sub_left_prediction(s->temp[0], s->temp[0], width , lefty);
+ leftu= sub_left_prediction(s->temp[1], s->temp[1], width2, leftu);
+ leftv= sub_left_prediction(s->temp[2], s->temp[2], width2, leftv);
+ }else{
+ lefty= sub_left_prediction(s->temp[0], ydst, width , lefty);
+ leftu= sub_left_prediction(s->temp[1], udst, width2, leftu);
+ leftv= sub_left_prediction(s->temp[2], vdst, width2, leftv);
+ }
+
+ encode_422_bitstream(s, width);
+ }
+ }
+ }else{
+ fprintf(stderr, "Format not supported!\n");
+ }
+ emms_c();
+
+ size= (get_bit_count(&s->pb)+31)/32;
+
+ if((s->flags&CODEC_FLAG_PASS1) && (s->picture_number&31)==0){
+ int j;
+ char *p= avctx->stats_out;
+ for(i=0; i<3; i++){
+ for(j=0; j<256; j++){
+ sprintf(p, "%Ld ", s->stats[i][j]);
+ p+= strlen(p);
+ s->stats[i][j]= 0;
+ }
+ sprintf(p, "\n");
+ p++;
+ }
+ }else{
+ bswap_buf((uint32_t*)buf, (uint32_t*)buf, size);
+ }
+
+ avctx->key_frame= 1;
+ avctx->pict_type= I_TYPE;
+
+ s->picture_number++;
+
+ return size*4;
+}
+
+static int encode_end(AVCodecContext *avctx)
+{
+// HYuvContext *s = avctx->priv_data;
+
+ av_freep(&avctx->extradata);
+ av_freep(&avctx->stats_out);
+
+ return 0;
+}
+
+AVCodec huffyuv_decoder = {
+ "huffyuv",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_HUFFYUV,
+ sizeof(HYuvContext),
+ decode_init,
+ NULL,
+ decode_end,
+ decode_frame,
+ 0,
+ NULL
+};
+
+AVCodec huffyuv_encoder = {
+ "huffyuv",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_HUFFYUV,
+ sizeof(HYuvContext),
+ encode_init,
+ encode_frame,
+ encode_end,
+};
projects / platform / upstream / libav.git / commitdiff