* 4XM codec
* Copyright (c) 2003 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/4xm.c
+ * @file
* 4XM codec.
*/
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "dsputil.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "bytestream.h"
//#undef NDEBUG
AVFrame current_picture, last_picture;
GetBitContext pre_gb; ///< ac/dc prefix
GetBitContext gb;
- const uint8_t *bytestream;
- const uint16_t *wordstream;
+ GetByteContext g;
+ GetByteContext g2;
int mv[256];
VLC pre_vlc;
int last_dc;
- DECLARE_ALIGNED_8(DCTELEM, block[6][64]);
- uint8_t *bitstream_buffer;
+ DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
+ void *bitstream_buffer;
unsigned int bitstream_buffer_size;
int version;
CFrameBuffer cfrm[CFRAME_BUFFER_COUNT];
}
static av_cold void init_vlcs(FourXContext *f){
+ static VLC_TYPE table[8][32][2];
int i;
for(i=0; i<8; i++){
+ block_type_vlc[0][i].table= table[i];
+ block_type_vlc[0][i].table_allocated= 32;
init_vlc(&block_type_vlc[0][i], BLOCK_TYPE_VLC_BITS, 7,
&block_type_tab[0][i][0][1], 2, 1,
- &block_type_tab[0][i][0][0], 2, 1, 1);
+ &block_type_tab[0][i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC);
}
}
}
}
-static inline void mcdc(uint16_t *dst, uint16_t *src, int log2w, int h, int stride, int scale, int dc){
+#if HAVE_BIGENDIAN
+#define LE_CENTRIC_MUL(dst, src, scale, dc) \
+ { \
+ unsigned tmpval = AV_RN32(src); \
+ tmpval = (tmpval << 16) | (tmpval >> 16); \
+ tmpval = tmpval * (scale) + (dc); \
+ tmpval = (tmpval << 16) | (tmpval >> 16); \
+ AV_WN32A(dst, tmpval); \
+ }
+#else
+#define LE_CENTRIC_MUL(dst, src, scale, dc) \
+ { \
+ unsigned tmpval = AV_RN32(src) * (scale) + (dc); \
+ AV_WN32A(dst, tmpval); \
+ }
+#endif
+
+static inline void mcdc(uint16_t *dst, uint16_t *src, int log2w, int h, int stride, int scale, unsigned dc){
int i;
dc*= 0x10001;
break;
case 1:
for(i=0; i<h; i++){
- ((uint32_t*)dst)[0] = scale*((uint32_t*)src)[0] + dc;
+ LE_CENTRIC_MUL(dst, src, scale, 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;
+ LE_CENTRIC_MUL(dst, src, scale, dc);
+ LE_CENTRIC_MUL(dst + 2, src + 2, scale, 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;
+ LE_CENTRIC_MUL(dst, src, scale, dc);
+ LE_CENTRIC_MUL(dst + 2, src + 2, scale, dc);
+ LE_CENTRIC_MUL(dst + 4, src + 4, scale, dc);
+ LE_CENTRIC_MUL(dst + 6, src + 6, scale, dc);
if(scale) src += stride;
dst += stride;
}
assert(code>=0 && code<=6);
if(code == 0){
- src += f->mv[ *f->bytestream++ ];
+ src += f->mv[bytestream2_get_byte(&f->g)];
if(start > src || src > end){
av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");
return;
}else if(code == 3 && f->version<2){
mcdc(dst, src, log2w, h, stride, 1, 0);
}else if(code == 4){
- src += f->mv[ *f->bytestream++ ];
+ src += f->mv[bytestream2_get_byte(&f->g)];
if(start > src || src > end){
av_log(f->avctx, AV_LOG_ERROR, "mv out of pic\n");
return;
}
- mcdc(dst, src, log2w, h, stride, 1, le2me_16(*f->wordstream++));
+ mcdc(dst, src, log2w, h, stride, 1, bytestream2_get_le16(&f->g2));
}else if(code == 5){
- mcdc(dst, src, log2w, h, stride, 0, le2me_16(*f->wordstream++));
+ mcdc(dst, src, log2w, h, stride, 0, bytestream2_get_le16(&f->g2));
}else if(code == 6){
if(log2w){
- dst[0] = le2me_16(*f->wordstream++);
- dst[1] = le2me_16(*f->wordstream++);
+ dst[0] = bytestream2_get_le16(&f->g2);
+ dst[1] = bytestream2_get_le16(&f->g2);
}else{
- dst[0 ] = le2me_16(*f->wordstream++);
- dst[stride] = le2me_16(*f->wordstream++);
+ dst[0 ] = bytestream2_get_le16(&f->g2);
+ dst[stride] = bytestream2_get_le16(&f->g2);
}
}
}
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;
- unsigned int bitstream_size, bytestream_size, wordstream_size, extra;
+ unsigned int bitstream_size, bytestream_size, wordstream_size, extra, bytestream_offset, wordstream_offset;
if(f->version>1){
extra=20;
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, (const uint32_t*)(buf + extra), bitstream_size/4);
+ av_fast_malloc(&f->bitstream_buffer, &f->bitstream_buffer_size, bitstream_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!f->bitstream_buffer)
+ return AVERROR(ENOMEM);
+ f->dsp.bswap_buf(f->bitstream_buffer, (const uint32_t*)(buf + extra), bitstream_size/4);
+ memset((uint8_t*)f->bitstream_buffer + bitstream_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
init_get_bits(&f->gb, f->bitstream_buffer, 8*bitstream_size);
- f->wordstream= (const uint16_t*)(buf + extra + bitstream_size);
- f->bytestream= buf + extra + bitstream_size + wordstream_size;
+ wordstream_offset = extra + bitstream_size;
+ bytestream_offset = extra + bitstream_size + wordstream_size;
+ bytestream2_init(&f->g2, buf + wordstream_offset, length - wordstream_offset);
+ bytestream2_init(&f->g, buf + bytestream_offset, length - bytestream_offset);
init_mv(f);
dst += 8*stride;
}
- if( bitstream_size != (get_bits_count(&f->gb)+31)/32*4
- || (((const char*)f->wordstream - (const char*)buf + 2)&~2) != extra + bitstream_size + wordstream_size
- || (((const char*)f->bytestream - (const char*)buf + 3)&~3) != extra + bitstream_size + wordstream_size + bytestream_size)
- av_log(f->avctx, AV_LOG_ERROR, " %d %td %td bytes left\n",
- bitstream_size - (get_bits_count(&f->gb)+31)/32*4,
- -(((const char*)f->bytestream - (const char*)buf + 3)&~3) + (extra + bitstream_size + wordstream_size + bytestream_size),
- -(((const char*)f->wordstream - (const char*)buf + 2)&~2) + (extra + bitstream_size + wordstream_size)
- );
-
return 0;
}
len_tab[j]= len;
}
- init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257,
- len_tab , 1, 1,
- bits_tab, 4, 4, 0);
+ if (init_vlc(&f->pre_vlc, ACDC_VLC_BITS, 257,
+ len_tab , 1, 1,
+ bits_tab, 4, 4, 0))
+ return NULL;
return ptr;
}
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 unsigned int bitstream_size= AV_RL32(buf);
- const int token_count av_unused = AV_RL32(buf + bitstream_size + 8);
- unsigned int prestream_size= 4*AV_RL32(buf + bitstream_size + 4);
- const uint8_t *prestream= buf + bitstream_size + 12;
+ int token_count av_unused;
+ unsigned int prestream_size;
+ const uint8_t *prestream;
+
+ if (length < bitstream_size + 12) {
+ av_log(f->avctx, AV_LOG_ERROR, "packet size too small\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ token_count = AV_RL32(buf + bitstream_size + 8);
+ prestream_size = 4 * AV_RL32(buf + bitstream_size + 4);
+ prestream = buf + bitstream_size + 12;
if(prestream_size + bitstream_size + 12 != length
|| bitstream_size > (1<<26)
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, (const uint32_t*)prestream, prestream_size/4);
+ av_fast_malloc(&f->bitstream_buffer, &f->bitstream_buffer_size, prestream_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!f->bitstream_buffer)
+ return AVERROR(ENOMEM);
+ f->dsp.bswap_buf(f->bitstream_buffer, (const uint32_t*)prestream, prestream_size/4);
+ memset((uint8_t*)f->bitstream_buffer + prestream_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
init_get_bits(&f->pre_gb, f->bitstream_buffer, 8*prestream_size);
f->last_dc= 0*128*8*8;
idct_put(f, x, y);
}
- dst += 16*stride;
}
if(get_vlc2(&f->pre_gb, f->pre_vlc.table, ACDC_VLC_BITS, 3) != 256)
}
if(frame_4cc == AV_RL32("ifr2")){
- p->pict_type= FF_I_TYPE;
+ p->pict_type= AV_PICTURE_TYPE_I;
if(decode_i2_frame(f, buf-4, frame_size) < 0)
return -1;
}else if(frame_4cc == AV_RL32("ifrm")){
- p->pict_type= FF_I_TYPE;
+ p->pict_type= AV_PICTURE_TYPE_I;
if(decode_i_frame(f, buf, frame_size) < 0)
return -1;
}else if(frame_4cc == AV_RL32("pfrm") || frame_4cc == AV_RL32("pfr2")){
- p->pict_type= FF_P_TYPE;
+ if(!f->last_picture.data[0]){
+ f->last_picture.reference= 1;
+ if(avctx->get_buffer(avctx, &f->last_picture) < 0){
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+ }
+
+ p->pict_type= AV_PICTURE_TYPE_P;
if(decode_p_frame(f, buf, frame_size) < 0)
return -1;
}else if(frame_4cc == AV_RL32("snd_")){
av_log(avctx, AV_LOG_ERROR, "ignoring unknown chunk length:%d\n", buf_size);
}
- p->key_frame= p->pict_type == FF_I_TYPE;
+ p->key_frame= p->pict_type == AV_PICTURE_TYPE_I;
*picture= *p;
*data_size = sizeof(AVPicture);
init_vlcs(f);
if(f->version>2) avctx->pix_fmt= PIX_FMT_RGB565;
- else avctx->pix_fmt= PIX_FMT_RGB555;
+ else avctx->pix_fmt= PIX_FMT_BGR555;
return 0;
}
f->cfrm[i].allocated_size= 0;
}
free_vlc(&f->pre_vlc);
+ if(f->current_picture.data[0])
+ avctx->release_buffer(avctx, &f->current_picture);
+ if(f->last_picture.data[0])
+ avctx->release_buffer(avctx, &f->last_picture);
return 0;
}
-AVCodec fourxm_decoder = {
- "4xm",
- CODEC_TYPE_VIDEO,
- CODEC_ID_4XM,
- sizeof(FourXContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- /*CODEC_CAP_DR1,*/
+AVCodec ff_fourxm_decoder = {
+ .name = "4xm",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_4XM,
+ .priv_data_size = sizeof(FourXContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("4X Movie"),
};
projects / ffmpeg / blobdiff