s->non_intra_matrix[i] = default_non_intra_matrix[i];
s->chroma_non_intra_matrix[i] = default_non_intra_matrix[i];
}
+ /* init macroblock skip table */
+ if (!s->encoding) {
+ s->mbskip_table = av_mallocz(s->mb_width * s->mb_height);
+ if (!s->mbskip_table)
+ goto fail;
+ }
+
s->context_initialized = 1;
return 0;
fail:
free(s->ac_val[0]);
if (s->coded_block)
free(s->coded_block);
+ if (s->mbskip_table)
+ free(s->mbskip_table);
for(i=0;i<3;i++) {
if (s->last_picture_base[i])
free(s->last_picture_base[i]);
free(s->ac_val[0]);
free(s->coded_block);
}
+ if (s->mbskip_table)
+ free(s->mbskip_table);
for(i=0;i<3;i++) {
free(s->last_picture_base[i]);
free(s->next_picture_base[i]);
if (s->out_format == FMT_H263)
h263_encode_init_vlc(s);
+ s->encoding = 1;
+
/* init */
if (MPV_common_init(s) < 0)
return -1;
if (!s->intra_only) {
UINT8 *dest_y, *dest_cb, *dest_cr;
+ UINT8 *mbskip_ptr;
+
+ /* avoid copy if macroblock skipped in last frame too */
+ if (!s->encoding) {
+ mbskip_ptr = &s->mbskip_table[s->mb_y * s->mb_width + s->mb_x];
+ if (s->mb_skiped) {
+ s->mb_skiped = 0;
+ /* if previous was skipped too, then nothing to do ! */
+ if (*mbskip_ptr != 0)
+ goto the_end;
+ *mbskip_ptr = 1; /* indicate that this time we skiped it */
+ } else {
+ *mbskip_ptr = 0; /* not skipped */
+ }
+ }
dest_y = s->current_picture[0] + (mb_y * 16 * s->linesize) + mb_x * 16;
dest_cb = s->current_picture[1] + (mb_y * 8 * (s->linesize >> 1)) + mb_x * 8;
put_dct(s, block[5], 5, dest_cr, dct_linesize >> 1);
}
}
+ the_end:
+ emms_c();
}
static void encode_picture(MpegEncContext *s, int picture_number)
ptr = s->last_picture[2] + offset;
sub_pixels_2(block[5], ptr, s->linesize >> 1, dxy);
}
+ emms_c();
/* DCT & quantize */
if (s->h263_msmpeg4) {
int h263_msmpeg4; /* generate MSMPEG4 compatible stream */
int h263_intel; /* use I263 intel h263 header */
int fixed_qscale; /* fixed qscale if non zero */
+ int encoding; /* true if we are encoding (vs decoding) */
/* the following fields are managed internally by the encoder */
/* bit output */
UINT8 *coded_block; /* used for coded block pattern prediction */
INT16 (*ac_val[3])[16]; /* used for for mpeg4 AC prediction */
int ac_pred;
+ int mb_skiped; /* MUST BE SET only during DECODING */
+ UINT8 *mbskip_table; /* used to avoid copy if macroblock
+ skipped (for black regions for example) */
int qscale;
int pict_type;