staticint cx18_s_stream_vbi_fmt(struct cx2341x_handler *cxhdl, u32 fmt)
{ struct cx18 *cx = container_of(cxhdl, struct cx18, cxhdl); int type = cxhdl->stream_type->val;
if (atomic_read(&cx->ana_capturing) > 0) return -EBUSY;
if (fmt != V4L2_MPEG_STREAM_VBI_FMT_IVTV ||
!(type == V4L2_MPEG_STREAM_TYPE_MPEG2_PS ||
type == V4L2_MPEG_STREAM_TYPE_MPEG2_DVD ||
type == V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD)) { /* Only IVTV fmt VBI insertion & only MPEG-2 PS type streams */
cx->vbi.insert_mpeg = V4L2_MPEG_STREAM_VBI_FMT_NONE;
CX18_DEBUG_INFO("disabled insertion of sliced VBI data into the MPEG stream\n"); return 0;
}
/* Allocate sliced VBI buffers if needed. */ if (cx->vbi.sliced_mpeg_data[0] == NULL) { int i;
for (i = 0; i < CX18_VBI_FRAMES; i++) {
cx->vbi.sliced_mpeg_data[i] =
kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL); if (cx->vbi.sliced_mpeg_data[i] == NULL) { while (--i >= 0) {
kfree(cx->vbi.sliced_mpeg_data[i]);
cx->vbi.sliced_mpeg_data[i] = NULL;
}
cx->vbi.insert_mpeg =
V4L2_MPEG_STREAM_VBI_FMT_NONE;
CX18_WARN("Unable to allocate buffers for sliced VBI data insertion\n"); return -ENOMEM;
}
}
}
cx->vbi.insert_mpeg = fmt;
CX18_DEBUG_INFO("enabled insertion of sliced VBI data into the MPEG PS,when sliced VBI is enabled\n");
/* * If our current settings have no lines set for capture, store a valid, * default set of service lines to capture, in our current settings.
*/ if (cx18_get_service_set(cx->vbi.sliced_in) == 0) { if (cx->is_60hz)
cx->vbi.sliced_in->service_set =
V4L2_SLICED_CAPTION_525; else
cx->vbi.sliced_in->service_set = V4L2_SLICED_WSS_625;
cx18_expand_service_set(cx->vbi.sliced_in, cx->is_50hz);
} return 0;
}
/* The audio clock of the digitizer must match the codec sample
rate otherwise you get some very strange effects. */ if (idx < ARRAY_SIZE(freqs))
cx18_call_all(cx, audio, s_clock_freq, freqs[idx]); return 0;
}
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.