static int read_header(AVFormatContext *avctx,
AVFormatParameters *ap)
{
TtyDemuxContext *s = avctx->priv_data;
AVStream *st = av_new_stream(avctx, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_tag = 0;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_ANSI;
if (ap->width) st->codec->width = ap->width;
if (ap->height) st->codec->height = ap->height;
if (!ap->time_base.num) {
av_set_pts_info(st, 60, 1, 25);
} else {
av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
}
/* simulate tty display speed */
s->chars_per_frame = FFMAX(av_q2d(st->time_base) * (ap->sample_rate ? ap->sample_rate : LINE_RATE), 1);
if (!url_is_streamed(avctx->pb)) {
s->fsize = url_fsize(avctx->pb);
st->duration = (s->fsize + s->chars_per_frame - 1) / s->chars_per_frame;
if (ff_sauce_read(avctx, &s->fsize, 0, 0) < 0)
efi_read(avctx, s->fsize - 51);
url_fseek(avctx->pb, 0, SEEK_SET);
}
return 0;
}
/*
* Read EFI - return partition number upon success.
*/
int
efi_alloc_and_read(int fd, struct dk_gpt **vtoc)
{
int rval;
uint32_t nparts;
int length;
/* figure out the number of entries that would fit into 16K */
nparts = EFI_MIN_ARRAY_SIZE / sizeof (efi_gpe_t);
length = (int) sizeof (struct dk_gpt) +
(int) sizeof (struct dk_part) * (nparts - 1);
if ((*vtoc = calloc(length, 1)) == NULL)
return (VT_ERROR);
(*vtoc)->efi_nparts = nparts;
rval = efi_read(fd, *vtoc);
if ((rval == VT_EINVAL) && (*vtoc)->efi_nparts > nparts) {
void *tmp;
length = (int) sizeof (struct dk_gpt) +
(int) sizeof (struct dk_part) *
((*vtoc)->efi_nparts - 1);
nparts = (*vtoc)->efi_nparts;
if ((tmp = realloc(*vtoc, length)) == NULL) {
free (*vtoc);
*vtoc = NULL;
return (VT_ERROR);
} else {
*vtoc = tmp;
rval = efi_read(fd, *vtoc);
}
}
if (rval < 0) {
if (efi_debug) {
(void) fprintf(stderr,
"read of EFI table failed, rval=%d\n", rval);
}
free (*vtoc);
*vtoc = NULL;
}
return (rval);
}
