int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
INT16 quant_matrixes[4][64];
VLC vlcs[2][4];
+
+ int org_width, org_height; /* size given at codec init */
+ int first_picture; /* true if decoding first picture */
+ int interlaced; /* true if interlaced */
+ int bottom_field; /* true if bottom field */
+
int width, height;
int nb_components;
int component_id[MAX_COMPONENTS];
account FF 00 case */
s->start_code = -1;
s->buf_ptr = s->buffer;
+ s->first_picture = 1;
+ s->org_width = avctx->width;
+ s->org_height = avctx->height;
build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12);
build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12);
}
s->width = width;
s->height = height;
+ /* test interlaced mode */
+ if (s->first_picture &&
+ s->org_height != 0 &&
+ s->height < ((s->org_height * 3) / 4)) {
+ s->interlaced = 1;
+ s->bottom_field = 0;
+ }
+
for(i=0;i<nb_components;i++) {
int w, h, hh, vv;
hh = s->h_max / s->h_count[i];
h = (s->height + 8 * vv - 1) / (8 * vv);
w = w * 8;
h = h * 8;
+ if (s->interlaced)
+ w *= 2;
s->linesize[i] = w;
/* memory test is done in mjpeg_decode_sos() */
s->current_picture[i] = av_mallocz(w * h);
}
+ s->first_picture = 0;
}
-
+
return 0;
}
ptr = s->current_picture[c] +
(s->linesize[c] * (v * mb_y + y) * 8) +
(h * mb_x + x) * 8;
+ if (s->interlaced && s->bottom_field)
+ ptr += s->linesize[c] >> 1;
put_pixels_clamped(s->block, ptr, s->linesize[c]);
if (++x == h) {
x = 0;
case SOS:
mjpeg_decode_sos(s, s->buffer, input_size);
if (s->start_code == EOI) {
+ int l;
+ if (s->interlaced) {
+ s->bottom_field ^= 1;
+ /* if not bottom field, do not output image yet */
+ if (s->bottom_field)
+ goto the_end;
+ }
for(i=0;i<3;i++) {
picture->data[i] = s->current_picture[i];
- picture->linesize[i] = s->linesize[i];
+ l = s->linesize[i];
+ if (s->interlaced)
+ l >>= 1;
+ picture->linesize[i] = l;
}
*data_size = sizeof(AVPicture);
avctx->height = s->height;
+ if (s->interlaced)
+ avctx->height *= 2;
avctx->width = s->width;
/* XXX: not complete test ! */
switch((s->h_count[0] << 4) | s->v_count[0]) {