* 4XM codec
* Copyright (c) 2003 Michael Niedermayer
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-
+
/**
* @file 4xm.c
* 4XM codec.
*/
-
+
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
typedef struct CFrameBuffer{
- int allocated_size;
- int size;
+ unsigned int allocated_size;
+ unsigned int size;
int id;
uint8_t *data;
}CFrameBuffer;
int mv[256];
VLC pre_vlc;
int last_dc;
- DCTELEM __align8 block[6][64];
+ DECLARE_ALIGNED_8(DCTELEM, block[6][64]);
uint8_t *bitstream_buffer;
- int bitstream_buffer_size;
+ unsigned int bitstream_buffer_size;
CFrameBuffer cfrm[CFRAME_BUFFER_COUNT];
} FourXContext;
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];
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];
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];
}
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);
- }
+ 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, 1);
}
}
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){
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,
+ const unsigned int bitstream_size= get32(buf+8);
+ const unsigned int bytestream_size= get32(buf+16);
+ const unsigned int wordstream_size= get32(buf+12);
+
+ if(bitstream_size+ bytestream_size+ wordstream_size + 20 != length
+ || bitstream_size > (1<<26)
+ || bytestream_size > (1<<26)
+ || wordstream_size > (1<<26)
+ ){
+ av_log(f->avctx, AV_LOG_ERROR, "lengths %d %d %d %d\n", bitstream_size, bytestream_size, wordstream_size,
bitstream_size+ bytestream_size+ wordstream_size - length);
-
+ return -1;
+ }
+
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;
+ 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,
+ av_log(f->avctx, AV_LOG_ERROR, " %d %td %td 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;
}
/* 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");
+ av_log(f->avctx, AV_LOG_ERROR, "error dc run != 0\n");
}
if(val)
i = 1;
for(;;) {
code = get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3);
-
+
/* EOB */
if (code == 0)
break;
level = get_xbits(&f->gb, code & 0xf);
i += code >> 4;
if (i >= 64) {
- printf("run %d oveflow\n", i);
+ av_log(f->avctx, AV_LOG_ERROR, "run %d oveflow\n", i);
return 0;
}
int i;
uint16_t *dst = ((uint16_t*)f->current_picture.data[0]) + y * stride + x;
- for(i=0; i<6; i++) idct(block[i]);
+ 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]);
+ }
+
+/* Note transform is:
+y= ( 1b + 4g + 2r)/14
+cb=( 3b - 2g - 1r)/14
+cr=(-1b - 4g + 5r)/14
+*/
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] + 0x80;
- int cr= block[5][x + 8*y] + 0x80;
+ int cb= block[4][x + 8*y];
+ int cr= block[5][x + 8*y];
int cg= (cb + cr)>>1;
int y;
-
- cb+=cb - 0x80;
-
+
+ cb+=cb;
+
y = temp[0];
- dst[0 ]= ((y+cb)>>3) + (((y+cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
+ 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);
+ 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);
+ 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[1+stride]= ((y+cb)>>3) + (((y-cg)&0xFC)<<3) + (((y+cr)&0xF8)<<8);
dst += 2;
}
dst += 2*stride - 2*8;
}
-// if(!(f->avctx->flags&CODEC_FLAG_GRAY)){
}
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;
}
int start, end;
uint8_t *ptr= buf;
int j;
-
+
memset(frequency, 0, sizeof(frequency));
memset(up, -1, sizeof(up));
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
+ while((ptr - buf)&3) ptr++; // 4byte align
-// for(j=0; j<16; j++)
-// printf("%2X", ptr[j]);
-
for(j=257; j<512; j++){
- int smallest[2]= {-1,-1};
+ 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] < frequency[ smallest[1] ]){
- if(frequency[i] < frequency[ smallest[0] ]){
- smallest[1]= smallest[0];
- smallest[0]= i;
- }else
- smallest[1]= i;
+ 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(smallest[1] == -1) break;
-
- frequency[j]= frequency[ smallest[0] ] + frequency[ smallest[1] ];
+ 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[0] ]=
up[ smallest[1] ]= j;
frequency[ smallest[0] ]= frequency[ smallest[1] ]= 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 ?
+ if(len > 31) av_log(f->avctx, AV_LOG_ERROR, "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,
+
+ init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257,
len_tab , 1, 1,
- bits_tab, 4, 4);
-
+ bits_tab, 4, 4, 0);
+
return ptr;
}
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= get32(buf + bitstream_size + 8);
- int prestream_size= 4*get32(buf + bitstream_size + 4);
+ const unsigned int bitstream_size= get32(buf);
+ const int token_count av_unused = get32(buf + bitstream_size + 8);
+ unsigned 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);
-
+
+ if(prestream_size + bitstream_size + 12 != length
+ || bitstream_size > (1<<26)
+ || prestream_size > (1<<26)){
+ av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d %d\n", prestream_size, bitstream_size, length);
+ return -1;
+ }
+
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)
idct_put(f, x, y);
}
- dst += 16*stride;
+ dst += 16*stride;
}
if(get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3) != 256)
- printf("end missmatch\n");
-
+ av_log(f->avctx, AV_LOG_ERROR, "end mismatch\n");
+
return 0;
}
-static int decode_frame(AVCodecContext *avctx,
+static int decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
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(buf_size != get32(buf+4)+8 || buf_size < 20){
+ av_log(f->avctx, AV_LOG_ERROR, "size mismatch %d %d\n", buf_size, get32(buf+4));
}
if(frame_4cc == ff_get_fourcc("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);
+ av_log(f->avctx, AV_LOG_ERROR, "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;
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);
-
+ if(!cfrm->data){ //explicit check needed as memcpy below might not catch a NULL
+ av_log(f->avctx, AV_LOG_ERROR, "realloc falure");
+ return -1;
+ }
+
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);
+ av_log(f->avctx, AV_LOG_ERROR, "cframe id mismatch %d %d\n", id, avctx->frame_number);
}
-
+
cfrm->size= cfrm->id= 0;
frame_4cc= ff_get_fourcc("pfrm");
}else
}else{
buf= buf + 12;
frame_size= buf_size - 12;
- }
+ }
temp= f->current_picture;
f->current_picture= f->last_picture;
p->reference= 1;
if(avctx->get_buffer(avctx, p) < 0){
- fprintf(stderr, "get_buffer() failed\n");
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
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);
+ av_log(avctx, AV_LOG_ERROR, "ignoring snd_ chunk length:%d\n", buf_size);
}else{
- printf("ignoring unknown chunk length:%d\n", buf_size);
+ av_log(avctx, AV_LOG_ERROR, "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 int decode_init(AVCodecContext *avctx){
FourXContext * const f = avctx->priv_data;
-
+
common_init(avctx);
init_vlcs(f);
f->cfrm[i].allocated_size= 0;
}
free_vlc(&f->pre_vlc);
-
- avcodec_default_free_buffers(avctx);
return 0;
}
projects / ffmpeg / blobdiff