*
* 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
int current_mv_x;
int current_mv_y;
int gob_number;
- int bits_left; //8 - nr of bits left of the following frame in the last byte in this frame
- int last_bits; //bits left of the following frame in the last byte in this frame
int gob_start_code_skipped; // 1 if gob start code is already read before gob header is read
}H261Context;
put_bits(&s->pb, 20, 0x10); /* PSC */
- temp_ref= s->picture_number * (int64_t)30000 * s->avctx->frame_rate_base /
- (1001 * (int64_t)s->avctx->frame_rate);
+ temp_ref= s->picture_number * (int64_t)30000 * s->avctx->time_base.num /
+ (1001 * (int64_t)s->avctx->time_base.den); //FIXME maybe this should use a timestamp
put_bits(&s->pb, 5, temp_ref & 0x1f); /* TemporalReference */
put_bits(&s->pb, 1, 0); /* split screen off */
put_bits(&s->pb, 1, 0); /* camera off */
put_bits(&s->pb, 1, 0); /* freeze picture release off */
-
+
format = ff_h261_get_picture_format(s->width, s->height);
-
+
put_bits(&s->pb, 1, format); /* 0 == QCIF, 1 == CIF */
put_bits(&s->pb, 1, 0); /* still image mode */
put_bits(&s->pb, 1, 0); /* reserved */
- put_bits(&s->pb, 1, 0); /* no PEI */
+ put_bits(&s->pb, 1, 0); /* no PEI */
if(format == 0)
h->gob_number = -1;
else
s->mb_y = index % 3 ; index /= 3;
s->mb_x+= 11*(index % 2); index /= 2;
s->mb_y+= 3*index;
-
+
ff_init_block_index(s);
ff_update_block_index(s);
}
if(val==0){
code = 0;
put_bits(&s->pb,h261_mv_tab[code][1],h261_mv_tab[code][0]);
- }
+ }
else{
- if(val > 16)
+ if(val > 15)
val -=32;
if(val < -16)
val+=32;
sign = val < 0;
- code = sign ? -val : val;
+ code = sign ? -val : val;
put_bits(&s->pb,h261_mv_tab[code][1],h261_mv_tab[code][0]);
put_bits(&s->pb,1,sign);
}
int mvd, mv_diff_x, mv_diff_y, i, cbp;
cbp = 63; // avoid warning
mvd = 0;
-
+
h->current_mba++;
h->mtype = 0;
-
+
if (!s->mb_intra){
/* compute cbp */
cbp= get_cbp(s, block);
-
+
/* mvd indicates if this block is motion compensated */
mvd = motion_x | motion_y;
/* MB is not skipped, encode MBA */
put_bits(&s->pb, h261_mba_bits[(h->current_mba-h->previous_mba)-1], h261_mba_code[(h->current_mba-h->previous_mba)-1]);
-
+
/* calculate MTYPE */
if(!s->mb_intra){
h->mtype++;
-
+
if(mvd || s->loop_filter)
h->mtype+=3;
if(s->loop_filter)
assert(h->mtype > 1);
}
- if(s->dquant)
+ if(s->dquant)
h->mtype++;
put_bits(&s->pb, h261_mtype_bits[h->mtype], h261_mtype_code[h->mtype]);
-
+
h->mtype = h261_mtype_map[h->mtype];
-
+
if(IS_QUANT(h->mtype)){
ff_set_qscale(s,s->qscale+s->dquant);
put_bits(&s->pb, 5, s->qscale);
}
-
+
if(IS_16X16(h->mtype)){
mv_diff_x = (motion_x >> 1) - h->current_mv_x;
mv_diff_y = (motion_y >> 1) - h->current_mv_y;
h261_encode_motion(h,mv_diff_x);
h261_encode_motion(h,mv_diff_y);
}
-
+
h->previous_mba = h->current_mba;
-
+
if(HAS_CBP(h->mtype)){
- put_bits(&s->pb,h261_cbp_tab[cbp-1][1],h261_cbp_tab[cbp-1][0]);
+ put_bits(&s->pb,h261_cbp_tab[cbp-1][1],h261_cbp_tab[cbp-1][0]);
}
for(i=0; i<6; i++) {
/* encode each block */
void ff_h261_encode_init(MpegEncContext *s){
static int done = 0;
-
+
if (!done) {
done = 1;
- init_rl(&h261_rl_tcoeff);
+ init_rl(&h261_rl_tcoeff, 1);
}
s->min_qcoeff= -127;
i = 1;
} else if((block[0]==1 || block[0] == -1) && (s->block_last_index[n] > -1)){
//special case
- put_bits(&s->pb,1,1);
- put_bits(&s->pb,1,block[0]>0 ? 0 : 1 );
+ put_bits(&s->pb,2,block[0]>0 ? 2 : 3 );
i = 1;
} else {
i = 0;
}
-
+
/* AC coefs */
last_index = s->block_last_index[n];
last_non_zero = i - 1;
if (code == rl->n) {
put_bits(&s->pb, 6, run);
assert(slevel != 0);
- if(slevel < -127){
- slevel = -127;
- }
- else if(slevel > 127){
- slevel = 127;
- }
+ assert(level <= 127);
put_bits(&s->pb, 8, slevel & 0xff);
} else {
put_bits(&s->pb, 1, sign);
static VLC h261_mv_vlc;
static VLC h261_cbp_vlc;
-void init_vlc_rl(RLTable *rl);
+void init_vlc_rl(RLTable *rl, int use_static);
static void h261_decode_init_vlc(H261Context *h){
static int done = 0;
done = 1;
init_vlc(&h261_mba_vlc, H261_MBA_VLC_BITS, 35,
h261_mba_bits, 1, 1,
- h261_mba_code, 1, 1);
+ h261_mba_code, 1, 1, 1);
init_vlc(&h261_mtype_vlc, H261_MTYPE_VLC_BITS, 10,
h261_mtype_bits, 1, 1,
- h261_mtype_code, 1, 1);
+ h261_mtype_code, 1, 1, 1);
init_vlc(&h261_mv_vlc, H261_MV_VLC_BITS, 17,
&h261_mv_tab[0][1], 2, 1,
- &h261_mv_tab[0][0], 2, 1);
+ &h261_mv_tab[0][0], 2, 1, 1);
init_vlc(&h261_cbp_vlc, H261_CBP_VLC_BITS, 63,
&h261_cbp_tab[0][1], 2, 1,
- &h261_cbp_tab[0][0], 2, 1);
- init_rl(&h261_rl_tcoeff);
- init_vlc_rl(&h261_rl_tcoeff);
+ &h261_cbp_tab[0][0], 2, 1, 1);
+ init_rl(&h261_rl_tcoeff, 1);
+ init_vlc_rl(&h261_rl_tcoeff, 1);
}
}
h261_decode_init_vlc(h);
h->gob_start_code_skipped = 0;
-
+
return 0;
}
static int h261_decode_gob_header(H261Context *h){
unsigned int val;
MpegEncContext * const s = &h->s;
-
+
if ( !h->gob_start_code_skipped ){
/* Check for GOB Start Code */
val = show_bits(&s->gb, 15);
{
MpegEncContext * const s = &h->s;
int i;
-
+
s->mb_intra = 0;
for(i=mba1; i<mba2; i++){
xy = s->mb_x + s->mb_y * s->mb_stride;
ff_init_block_index(s);
ff_update_block_index(s);
- s->dsp.clear_blocks(s->block[0]);
for(j=0;j<6;j++)
s->block_last_index[j] = -1;
s->current_picture.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_skiped = 1;
+ s->mb_skipped = 1;
h->mtype &= ~MB_TYPE_H261_FIL;
MPV_decode_mb(s, s->block);
if(mv_diff && !get_bits1(gb))
mv_diff= -mv_diff;
-
+
v += mv_diff;
if (v <=-16) v+= 32;
else if(v >= 16) v-= 32;
if ( h->current_mba > MBA_STUFFING )
return SLICE_ERROR;
-
+
s->mb_x= ((h->gob_number-1) % 2) * 11 + ((h->current_mba-1) % 11);
s->mb_y= ((h->gob_number-1) / 2) * 3 + ((h->current_mba-1) / 11);
xy = s->mb_x + s->mb_y * s->mb_stride;
ff_init_block_index(s);
ff_update_block_index(s);
- s->dsp.clear_blocks(s->block[0]);
// Read mtype
h->mtype = get_vlc2(&s->gb, h261_mtype_vlc.table, H261_MTYPE_VLC_BITS, 2);
intra:
/* decode each block */
if(s->mb_intra || HAS_CBP(h->mtype)){
+ s->dsp.clear_blocks(s->block[0]);
for (i = 0; i < 6; i++) {
if (h261_decode_block(h, s->block[i], i, cbp&32) < 0){
return SLICE_ERROR;
}
cbp+=cbp;
}
+ }else{
+ for (i = 0; i < 6; i++)
+ s->block_last_index[i]= -1;
}
MPV_decode_mb(s, s->block);
int code, level, i, j, run;
RLTable *rl = &h261_rl_tcoeff;
const uint8_t *scan_table;
-
+
// For the variable length encoding there are two code tables, one being used for
// the first transmitted LEVEL in INTER, INTER+MC and INTER+MC+FIL blocks, the second
// for all other LEVELs except the first one in INTRA blocks which is fixed length
/* escape */
// The remaining combinations of (run, level) are encoded with a 20-bit word consisting of 6 bits escape, 6 bits run and 8 bits level.
run = get_bits(&s->gb, 6);
- level = (int8_t)get_bits(&s->gb, 8);
+ level = get_sbits(&s->gb, 8);
}else if(code == 0){
break;
}else{
* decodes the H261 picture header.
* @return <0 if no startcode found
*/
-int h261_decode_picture_header(H261Context *h){
+static int h261_decode_picture_header(H261Context *h){
MpegEncContext * const s = &h->s;
int format, i;
uint32_t startcode= 0;
skip_bits(&s->gb, 8);
}
- // h261 has no I-FRAMES, but if we pass I_TYPE for the first frame, the codec crashes if it does
+ // h261 has no I-FRAMES, but if we pass I_TYPE for the first frame, the codec crashes if it does
// not contain all I-blocks (e.g. when a packet is lost)
s->pict_type = P_TYPE;
static int h261_decode_gob(H261Context *h){
MpegEncContext * const s = &h->s;
-
+
ff_set_qscale(s, s->qscale);
/* decode mb's */
ret= h261_decode_mb(h);
if(ret<0){
if(ret==SLICE_END){
- h261_decode_mb_skipped(h, h->current_mba, 33);
+ h261_decode_mb_skipped(h, h->current_mba, 33);
return 0;
}
av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", s->mb_x + s->mb_y*s->mb_stride);
return -1;
}
-
+
h261_decode_mb_skipped(h, h->current_mba-h->mba_diff, h->current_mba-1);
}
-
+
return -1;
}
static int h261_find_frame_end(ParseContext *pc, AVCodecContext* avctx, const uint8_t *buf, int buf_size){
- int vop_found, i, j, bits_left, last_bits;
+ int vop_found, i, j;
uint32_t state;
- H261Context *h = avctx->priv_data;
-
- if(h){
- bits_left = h->bits_left;
- last_bits = h->last_bits;
- }
- else{
- bits_left = 0;
- last_bits = 0;
- }
-
vop_found= pc->frame_start_found;
state= pc->state;
- if(bits_left!=0 && !vop_found)
- state = state << (8-bits_left) | last_bits;
- i=0;
- if(!vop_found){
- for(i=0; i<buf_size; i++){
- state= (state<<8) | buf[i];
- for(j=0; j<8; j++){
- if(( ( (state<<j) | (buf[i]>>(8-j)) )>>(32-20) == 0x10 )&&(((state >> (17-j)) & 0x4000) == 0x0)){
- i++;
- vop_found=1;
- break;
- }
+
+ for(i=0; i<buf_size && !vop_found; i++){
+ state= (state<<8) | buf[i];
+ for(j=0; j<8; j++){
+ if(((state>>j)&0xFFFFF) == 0x00010){
+ i++;
+ vop_found=1;
+ break;
}
- if(vop_found)
- break;
}
}
if(vop_found){
for(; i<buf_size; i++){
- if(avctx->flags & CODEC_FLAG_TRUNCATED)//XXX ffplay workaround, someone a better solution?
- state= (state<<8) | buf[i];
+ state= (state<<8) | buf[i];
for(j=0; j<8; j++){
- if(( ( (state<<j) | (buf[i]>>(8-j)) )>>(32-20) == 0x10 )&&(((state >> (17-j)) & 0x4000) == 0x0)){
+ if(((state>>j)&0xFFFFF) == 0x00010){
pc->frame_start_found=0;
- pc->state=-1;
- return i-3;
+ pc->state= state>>(2*8);
+ return i-1;
}
}
}
static int h261_parse(AVCodecParserContext *s,
AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
+ uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size)
{
ParseContext *pc = s->priv_data;
int next;
-
+
next= h261_find_frame_end(pc,avctx, buf, buf_size);
if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
*poutbuf = NULL;
* returns the number of bytes consumed for building the current frame
*/
static int get_consumed_bytes(MpegEncContext *s, int buf_size){
- if(s->flags&CODEC_FLAG_TRUNCATED){
- int pos= (get_bits_count(&s->gb)+7)>>3;
- pos -= s->parse_context.last_index;
- if(pos<0) pos=0;// padding is not really read so this might be -1
- return pos;
- }else{
- int pos= get_bits_count(&s->gb)>>3;
- if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...)
- if(pos+10>buf_size) pos=buf_size; // oops ;)
+ int pos= get_bits_count(&s->gb)>>3;
+ if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...)
+ if(pos+10>buf_size) pos=buf_size; // oops ;)
- return pos;
- }
+ return pos;
}
static int h261_decode_frame(AVCodecContext *avctx,
AVFrame *pict = data;
#ifdef DEBUG
- printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);
- printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
+ av_log(avctx, AV_LOG_DEBUG, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
+ av_log(avctx, AV_LOG_DEBUG, "bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
#endif
s->flags= avctx->flags;
s->flags2= avctx->flags2;
- /* no supplementary picture */
- if (buf_size == 0) {
- return 0;
- }
-
- if(s->flags&CODEC_FLAG_TRUNCATED){
- int next;
-
- next= h261_find_frame_end(&s->parse_context,avctx, buf, buf_size);
-
- if( ff_combine_frame(&s->parse_context, next, &buf, &buf_size) < 0 )
- return buf_size;
- }
-
+ h->gob_start_code_skipped=0;
retry:
/* skip everything if we are in a hurry>=5 */
if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
+ if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
+ ||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
+ || avctx->skip_frame >= AVDISCARD_ALL)
+ return get_consumed_bytes(s, buf_size);
if(MPV_frame_start(s, avctx) < 0)
return -1;
assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
assert(s->current_picture.pict_type == s->pict_type);
- *pict= *(AVFrame*)&s->current_picture;
+ *pict= *(AVFrame*)s->current_picture_ptr;
ff_print_debug_info(s, pict);
/* Return the Picture timestamp as the frame number */
return 0;
}
+#ifdef CONFIG_ENCODERS
AVCodec h261_encoder = {
"h261",
CODEC_TYPE_VIDEO,
MPV_encode_picture,
MPV_encode_end,
};
+#endif
AVCodec h261_decoder = {
"h261",
NULL,
h261_decode_end,
h261_decode_frame,
- CODEC_CAP_TRUNCATED,
+ CODEC_CAP_DR1,
};
AVCodecParser h261_parser = {
projects / ffmpeg / blobdiff