* Copyright (c) 2001 Juan J. Sierralta P
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
- * 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/ituh263dec.c
+ * @file
* h263 decoder.
*/
//#define DEBUG
#include <limits.h>
+#include "libavutil/mathematics.h"
#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
void ff_h263_show_pict_info(MpegEncContext *s){
if(s->avctx->debug&FF_DEBUG_PICT_INFO){
av_log(s->avctx, AV_LOG_DEBUG, "qp:%d %c size:%d rnd:%d%s%s%s%s%s%s%s%s%s %d/%d\n",
- s->qscale, av_get_pict_type_char(s->pict_type),
+ s->qscale, av_get_picture_type_char(s->pict_type),
s->gb.size_in_bits, 1-s->no_rounding,
s->obmc ? " AP" : "",
s->umvplus ? " UMV" : "",
/* init vlcs */
/* XXX: find a better solution to handle static init */
-void h263_decode_init_vlc(MpegEncContext *s)
+void ff_h263_decode_init_vlc(MpegEncContext *s)
{
static int done = 0;
&ff_h263_cbpy_tab[0][1], 2, 1,
&ff_h263_cbpy_tab[0][0], 2, 1, 64);
INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 33,
- &mvtab[0][1], 2, 1,
- &mvtab[0][0], 2, 1, 538);
- init_rl(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]);
- init_rl(&rl_intra_aic, ff_h263_static_rl_table_store[1]);
+ &ff_mvtab[0][1], 2, 1,
+ &ff_mvtab[0][0], 2, 1, 538);
+ ff_init_rl(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]);
+ ff_init_rl(&ff_rl_intra_aic, ff_h263_static_rl_table_store[1]);
INIT_VLC_RL(ff_h263_rl_inter, 554);
- INIT_VLC_RL(rl_intra_aic, 554);
+ INIT_VLC_RL(ff_rl_intra_aic, 554);
INIT_VLC_STATIC(&h263_mbtype_b_vlc, H263_MBTYPE_B_VLC_BITS, 15,
- &h263_mbtype_b_tab[0][1], 2, 1,
- &h263_mbtype_b_tab[0][0], 2, 1, 80);
+ &ff_h263_mbtype_b_tab[0][1], 2, 1,
+ &ff_h263_mbtype_b_tab[0][0], 2, 1, 80);
INIT_VLC_STATIC(&cbpc_b_vlc, CBPC_B_VLC_BITS, 4,
- &cbpc_b_tab[0][1], 2, 1,
- &cbpc_b_tab[0][0], 2, 1, 8);
+ &ff_cbpc_b_tab[0][1], 2, 1,
+ &ff_cbpc_b_tab[0][0], 2, 1, 8);
}
}
}
/**
- * decodes the group of blocks header or slice header.
+ * Decode the group of blocks header or slice header.
* @return <0 if an error occurred
*/
static int h263_decode_gob_header(MpegEncContext *s)
{
- unsigned int val, gfid, gob_number;
+ unsigned int val, gob_number;
int left;
/* Check for GOB Start Code */
s->qscale = get_bits(&s->gb, 5); /* SQUANT */
if(get_bits1(&s->gb)==0)
return -1;
- gfid = get_bits(&s->gb, 2); /* GFID */
+ skip_bits(&s->gb, 2); /* GFID */
}else{
gob_number = get_bits(&s->gb, 5); /* GN */
s->mb_x= 0;
s->mb_y= s->gob_index* gob_number;
- gfid = get_bits(&s->gb, 2); /* GFID */
+ skip_bits(&s->gb, 2); /* GFID */
s->qscale = get_bits(&s->gb, 5); /* GQUANT */
}
}
/**
- * finds the next resync_marker
+ * Find the next resync_marker.
* @param p pointer to buffer to scan
* @param end pointer to the end of the buffer
* @return pointer to the next resync_marker, or end if none was found
}
/**
- * decodes the group of blocks / video packet header.
+ * Decode the group of blocks / video packet header.
* @return bit position of the resync_marker, or <0 if none was found
*/
int ff_h263_resync(MpegEncContext *s){
if(show_bits(&s->gb, 16)==0){
pos= get_bits_count(&s->gb);
if(CONFIG_MPEG4_DECODER && s->codec_id==CODEC_ID_MPEG4)
- ret= mpeg4_decode_video_packet_header(s);
+ ret= ff_mpeg4_decode_video_packet_header(s);
else
ret= h263_decode_gob_header(s);
if(ret>=0)
pos= get_bits_count(&s->gb);
if(CONFIG_MPEG4_DECODER && s->codec_id==CODEC_ID_MPEG4)
- ret= mpeg4_decode_video_packet_header(s);
+ ret= ff_mpeg4_decode_video_packet_header(s);
else
ret= h263_decode_gob_header(s);
if(ret>=0)
return -1;
}
-int h263_decode_motion(MpegEncContext * s, int pred, int f_code)
+int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code)
{
- int code, val, sign, shift, l;
+ int code, val, sign, shift;
code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
if (code == 0)
/* modulo decoding */
if (!s->h263_long_vectors) {
- l = INT_BIT - 5 - f_code;
- val = (val<<l)>>l;
+ val = sign_extend(val, 5 + f_code);
} else {
/* horrible h263 long vector mode */
if (pred < -31 && val < -63)
}
-/* Decodes RVLC of H.263+ UMV */
+/* Decode RVLC of H.263+ UMV */
static int h263p_decode_umotion(MpegEncContext * s, int pred)
{
int code = 0, sign;
code >>= 1;
code = (sign) ? (pred - code) : (pred + code);
- dprintf(s->avctx,"H.263+ UMV Motion = %d\n", code);
+ av_dlog(s->avctx,"H.263+ UMV Motion = %d\n", code);
return code;
}
s->block_index[i]+= 1;
s->mb_x++;
- assert(s->pict_type == FF_P_TYPE);
+ assert(s->pict_type == AV_PICTURE_TYPE_P);
do{
if (get_bits1(&s->gb)) {
/* skip mb */
- mot_val = s->current_picture.motion_val[0][ s->block_index[0] ];
+ mot_val = s->current_picture.f.motion_val[0][s->block_index[0]];
mot_val[0 ]= mot_val[2 ]=
mot_val[0+stride]= mot_val[2+stride]= 0;
mot_val[1 ]= mot_val[3 ]=
mot_val[1+stride]= mot_val[3+stride]= 0;
- s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
goto end;
}
cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
}while(cbpc == 20);
if(cbpc & 4){
- s->current_picture.mb_type[xy]= MB_TYPE_INTRA;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA;
}else{
get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
if (cbpc & 8) {
}
if ((cbpc & 16) == 0) {
- s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0;
/* 16x16 motion prediction */
- mot_val= h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
+ mot_val= ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
if (s->umvplus)
mx = h263p_decode_umotion(s, pred_x);
else
- mx = h263_decode_motion(s, pred_x, 1);
+ mx = ff_h263_decode_motion(s, pred_x, 1);
if (s->umvplus)
my = h263p_decode_umotion(s, pred_y);
else
- my = h263_decode_motion(s, pred_y, 1);
+ my = ff_h263_decode_motion(s, pred_y, 1);
mot_val[0 ]= mot_val[2 ]=
mot_val[0+stride]= mot_val[2+stride]= mx;
mot_val[1 ]= mot_val[3 ]=
mot_val[1+stride]= mot_val[3+stride]= my;
} else {
- s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0;
for(i=0;i<4;i++) {
- mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y);
+ mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
if (s->umvplus)
mx = h263p_decode_umotion(s, pred_x);
else
- mx = h263_decode_motion(s, pred_x, 1);
+ mx = ff_h263_decode_motion(s, pred_x, 1);
if (s->umvplus)
my = h263p_decode_umotion(s, pred_y);
else
- my = h263_decode_motion(s, pred_y, 1);
+ my = ff_h263_decode_motion(s, pred_y, 1);
if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1)
skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */
mot_val[0] = mx;
if(s->modified_quant){
if(get_bits1(&s->gb))
- s->qscale= modified_quant_tab[get_bits1(&s->gb)][ s->qscale ];
+ s->qscale= ff_modified_quant_tab[get_bits1(&s->gb)][ s->qscale ];
else
s->qscale= get_bits(&s->gb, 5);
}else
scan_table = s->intra_scantable.permutated;
if (s->h263_aic && s->mb_intra) {
- rl = &rl_intra_aic;
+ rl = &ff_rl_intra_aic;
i = 0;
if (s->ac_pred) {
if (s->h263_aic_dir)
/* DC coef */
if(s->codec_id == CODEC_ID_RV10){
#if CONFIG_RV10_DECODER
- if (s->rv10_version == 3 && s->pict_type == FF_I_TYPE) {
+ if (s->rv10_version == 3 && s->pict_type == AV_PICTURE_TYPE_I) {
int component, diff;
component = (n <= 3 ? 0 : n - 4 + 1);
level = s->last_dc[component];
if (s->rv10_first_dc_coded[component]) {
- diff = rv_decode_dc(s, n);
+ diff = ff_rv_decode_dc(s, n);
if (diff == 0xffff)
return -1;
level += diff;
level = get_bits(&s->gb, 8);
if((level&0x7F) == 0){
av_log(s->avctx, AV_LOG_ERROR, "illegal dc %d at %d %d\n", level, s->mb_x, s->mb_y);
- if(s->error_recognition >= FF_ER_COMPLIANT)
+ if(s->err_recognition & AV_EF_BITSTREAM)
return -1;
}
if (level == 255)
if (i >= 64){
if(s->alt_inter_vlc && rl == &ff_h263_rl_inter && !s->mb_intra){
//Looks like a hack but no, it's the way it is supposed to work ...
- rl = &rl_intra_aic;
+ rl = &ff_rl_intra_aic;
i = 0;
s->gb= gb;
s->dsp.clear_block(block);
}
not_coded:
if (s->mb_intra && s->h263_aic) {
- h263_pred_acdc(s, block, n);
+ ff_h263_pred_acdc(s, block, n);
i = 63;
}
s->block_last_index[n] = i;
static int h263_skip_b_part(MpegEncContext *s, int cbp)
{
- DECLARE_ALIGNED(16, DCTELEM, dblock[64]);
+ LOCAL_ALIGNED_16(DCTELEM, dblock, [64]);
int i, mbi;
/* we have to set s->mb_intra to zero to decode B-part of PB-frame correctly
assert(!s->h263_pred);
- if (s->pict_type == FF_P_TYPE) {
+ if (s->pict_type == AV_PICTURE_TYPE_P) {
do{
if (get_bits1(&s->gb)) {
/* skip mb */
s->block_last_index[i] = -1;
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
- s->current_picture.mb_type[xy]= MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
s->mv[0][0][0] = 0;
s->mv[0][0][1] = 0;
s->mb_skipped = !(s->obmc | s->loop_filter);
s->mv_dir = MV_DIR_FORWARD;
if ((cbpc & 16) == 0) {
- s->current_picture.mb_type[xy]= MB_TYPE_16x16 | MB_TYPE_L0;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0;
/* 16x16 motion prediction */
s->mv_type = MV_TYPE_16X16;
- h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
+ ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
if (s->umvplus)
mx = h263p_decode_umotion(s, pred_x);
else
- mx = h263_decode_motion(s, pred_x, 1);
+ mx = ff_h263_decode_motion(s, pred_x, 1);
if (mx >= 0xffff)
return -1;
if (s->umvplus)
my = h263p_decode_umotion(s, pred_y);
else
- my = h263_decode_motion(s, pred_y, 1);
+ my = ff_h263_decode_motion(s, pred_y, 1);
if (my >= 0xffff)
return -1;
if (s->umvplus && (mx - pred_x) == 1 && (my - pred_y) == 1)
skip_bits1(&s->gb); /* Bit stuffing to prevent PSC */
} else {
- s->current_picture.mb_type[xy]= MB_TYPE_8x8 | MB_TYPE_L0;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0;
s->mv_type = MV_TYPE_8X8;
for(i=0;i<4;i++) {
- mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y);
+ mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
if (s->umvplus)
mx = h263p_decode_umotion(s, pred_x);
else
- mx = h263_decode_motion(s, pred_x, 1);
+ mx = ff_h263_decode_motion(s, pred_x, 1);
if (mx >= 0xffff)
return -1;
if (s->umvplus)
my = h263p_decode_umotion(s, pred_y);
else
- my = h263_decode_motion(s, pred_y, 1);
+ my = ff_h263_decode_motion(s, pred_y, 1);
if (my >= 0xffff)
return -1;
s->mv[0][i][0] = mx;
mot_val[1] = my;
}
}
- } else if(s->pict_type==FF_B_TYPE) {
+ } else if(s->pict_type==AV_PICTURE_TYPE_B) {
int mb_type;
const int stride= s->b8_stride;
- int16_t *mot_val0 = s->current_picture.motion_val[0][ 2*(s->mb_x + s->mb_y*stride) ];
- int16_t *mot_val1 = s->current_picture.motion_val[1][ 2*(s->mb_x + s->mb_y*stride) ];
+ int16_t *mot_val0 = s->current_picture.f.motion_val[0][2 * (s->mb_x + s->mb_y * stride)];
+ int16_t *mot_val1 = s->current_picture.f.motion_val[1][2 * (s->mb_x + s->mb_y * stride)];
// const int mv_xy= s->mb_x + 1 + s->mb_y * s->mb_stride;
//FIXME ugly
//FIXME UMV
if(USES_LIST(mb_type, 0)){
- int16_t *mot_val= h263_pred_motion(s, 0, 0, &mx, &my);
+ int16_t *mot_val= ff_h263_pred_motion(s, 0, 0, &mx, &my);
s->mv_dir = MV_DIR_FORWARD;
- mx = h263_decode_motion(s, mx, 1);
- my = h263_decode_motion(s, my, 1);
+ mx = ff_h263_decode_motion(s, mx, 1);
+ my = ff_h263_decode_motion(s, my, 1);
s->mv[0][0][0] = mx;
s->mv[0][0][1] = my;
}
if(USES_LIST(mb_type, 1)){
- int16_t *mot_val= h263_pred_motion(s, 0, 1, &mx, &my);
+ int16_t *mot_val= ff_h263_pred_motion(s, 0, 1, &mx, &my);
s->mv_dir |= MV_DIR_BACKWARD;
- mx = h263_decode_motion(s, mx, 1);
- my = h263_decode_motion(s, my, 1);
+ mx = ff_h263_decode_motion(s, mx, 1);
+ my = ff_h263_decode_motion(s, my, 1);
s->mv[1][0][0] = mx;
s->mv[1][0][1] = my;
}
}
- s->current_picture.mb_type[xy]= mb_type;
+ s->current_picture.f.mb_type[xy] = mb_type;
} else { /* I-Frame */
do{
cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
dquant = cbpc & 4;
s->mb_intra = 1;
intra:
- s->current_picture.mb_type[xy]= MB_TYPE_INTRA;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA;
if (s->h263_aic) {
s->ac_pred = get_bits1(&s->gb);
if(s->ac_pred){
- s->current_picture.mb_type[xy]= MB_TYPE_INTRA | MB_TYPE_ACPRED;
+ s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED;
s->h263_aic_dir = get_bits1(&s->gb);
}
}
while(pb_mv_count--){
- h263_decode_motion(s, 0, 1);
- h263_decode_motion(s, 0, 1);
+ ff_h263_decode_motion(s, 0, 1);
+ ff_h263_decode_motion(s, 0, 1);
}
/* decode each block */
if(s->pb_frame && h263_skip_b_part(s, cbpb) < 0)
return -1;
if(s->obmc && !s->mb_intra){
- if(s->pict_type == FF_P_TYPE && s->mb_x+1<s->mb_width && s->mb_num_left != 1)
+ if(s->pict_type == AV_PICTURE_TYPE_P && s->mb_x+1<s->mb_width && s->mb_num_left != 1)
preview_obmc(s);
}
end:
{
int v= show_bits(&s->gb, 16);
- if(get_bits_count(&s->gb) + 16 > s->gb.size_in_bits){
- v>>= get_bits_count(&s->gb) + 16 - s->gb.size_in_bits;
+ if (get_bits_left(&s->gb) < 16) {
+ v >>= 16 - get_bits_left(&s->gb);
}
if(v==0)
}
/* most is hardcoded. should extend to handle all h263 streams */
-int h263_decode_picture_header(MpegEncContext *s)
+int ff_h263_decode_picture_header(MpegEncContext *s)
{
int format, width, height, i;
uint32_t startcode;
i = get_bits(&s->gb, 8); /* picture timestamp */
if( (s->picture_number&~0xFF)+i < s->picture_number)
i+= 256;
- s->current_picture_ptr->pts=
+ s->current_picture_ptr->f.pts =
s->picture_number= (s->picture_number&~0xFF) + i;
/* PTYPE starts here */
if (format != 7 && format != 6) {
s->h263_plus = 0;
/* H.263v1 */
- width = h263_format[format][0];
- height = h263_format[format][1];
+ width = ff_h263_format[format][0];
+ height = ff_h263_format[format][1];
if (!width)
return -1;
- s->pict_type = FF_I_TYPE + get_bits1(&s->gb);
+ s->pict_type = AV_PICTURE_TYPE_I + get_bits1(&s->gb);
s->h263_long_vectors = get_bits1(&s->gb);
if (ufep == 1) {
/* OPPTYPE */
format = get_bits(&s->gb, 3);
- dprintf(s->avctx, "ufep=1, format: %d\n", format);
+ av_dlog(s->avctx, "ufep=1, format: %d\n", format);
s->custom_pcf= get_bits1(&s->gb);
s->umvplus = get_bits1(&s->gb); /* Unrestricted Motion Vector */
if (get_bits1(&s->gb) != 0) {
/* MPPTYPE */
s->pict_type = get_bits(&s->gb, 3);
switch(s->pict_type){
- case 0: s->pict_type= FF_I_TYPE;break;
- case 1: s->pict_type= FF_P_TYPE;break;
- case 2: s->pict_type= FF_P_TYPE;s->pb_frame = 3;break;
- case 3: s->pict_type= FF_B_TYPE;break;
- case 7: s->pict_type= FF_I_TYPE;break; //ZYGO
+ case 0: s->pict_type= AV_PICTURE_TYPE_I;break;
+ case 1: s->pict_type= AV_PICTURE_TYPE_P;break;
+ case 2: s->pict_type= AV_PICTURE_TYPE_P;s->pb_frame = 3;break;
+ case 3: s->pict_type= AV_PICTURE_TYPE_B;break;
+ case 7: s->pict_type= AV_PICTURE_TYPE_I;break; //ZYGO
default:
return -1;
}
if (format == 6) {
/* Custom Picture Format (CPFMT) */
s->aspect_ratio_info = get_bits(&s->gb, 4);
- dprintf(s->avctx, "aspect: %d\n", s->aspect_ratio_info);
+ av_dlog(s->avctx, "aspect: %d\n", s->aspect_ratio_info);
/* aspect ratios:
0 - forbidden
1 - 1:1
width = (get_bits(&s->gb, 9) + 1) * 4;
skip_bits1(&s->gb);
height = get_bits(&s->gb, 9) * 4;
- dprintf(s->avctx, "\nH.263+ Custom picture: %dx%d\n",width,height);
+ av_dlog(s->avctx, "\nH.263+ Custom picture: %dx%d\n",width,height);
if (s->aspect_ratio_info == FF_ASPECT_EXTENDED) {
/* aspected dimensions */
s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 8);
s->avctx->sample_aspect_ratio= ff_h263_pixel_aspect[s->aspect_ratio_info];
}
} else {
- width = h263_format[format][0];
- height = h263_format[format][1];
+ width = ff_h263_format[format][0];
+ height = ff_h263_format[format][1];
s->avctx->sample_aspect_ratio= (AVRational){12,11};
}
if ((width == 0) || (height == 0))
}
ff_h263_show_pict_info(s);
- if (s->pict_type == FF_I_TYPE && s->codec_tag == AV_RL32("ZYGO")){
+ if (s->pict_type == AV_PICTURE_TYPE_I && s->codec_tag == AV_RL32("ZYGO")){
int i,j;
for(i=0; i<85; i++) av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
av_log(s->avctx, AV_LOG_DEBUG, "\n");
projects / ffmpeg / blobdiff