static VALUE
get_node(rb_yaml_parser_t *parser)
{
VALUE node;
NEXT_EVENT();
switch (parser->event.type) {
case YAML_DOCUMENT_END_EVENT:
case YAML_MAPPING_END_EVENT:
case YAML_SEQUENCE_END_EVENT:
case YAML_STREAM_END_EVENT:
return Qundef;
case YAML_MAPPING_START_EVENT:
node = handle_mapping(parser);
break;
case YAML_SEQUENCE_START_EVENT:
node = handle_sequence(parser);
break;
case YAML_SCALAR_EVENT:
node = handle_scalar(parser);
break;
case YAML_ALIAS_EVENT:
// ignoring alias
node = Qundef;
break;
default:
rb_raise(rb_eArgError, "Invalid event %d at top level",
(int)parser->event.type);
}
return node;
}
static GstFlowReturn
gst_mpeg2dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder);
GstBuffer *buf = frame->input_buffer;
GstMapInfo minfo;
const mpeg2_info_t *info;
mpeg2_state_t state;
gboolean done = FALSE;
GstFlowReturn ret = GST_FLOW_OK;
GST_LOG_OBJECT (mpeg2dec, "received frame %d, timestamp %"
GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
frame->system_frame_number,
GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (frame->duration));
gst_buffer_ref (buf);
if (!gst_buffer_map (buf, &minfo, GST_MAP_READ)) {
GST_ERROR_OBJECT (mpeg2dec, "Failed to map input buffer");
return GST_FLOW_ERROR;
}
info = mpeg2dec->info;
GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer");
mpeg2_buffer (mpeg2dec->decoder, minfo.data, minfo.data + minfo.size);
GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer done");
while (!done) {
GST_LOG_OBJECT (mpeg2dec, "calling parse");
state = mpeg2_parse (mpeg2dec->decoder);
GST_DEBUG_OBJECT (mpeg2dec, "parse state %d", state);
switch (state) {
#if MPEG2_RELEASE >= MPEG2_VERSION (0, 5, 0)
case STATE_SEQUENCE_MODIFIED:
GST_DEBUG_OBJECT (mpeg2dec, "sequence modified");
mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
gst_mpeg2dec_clear_buffers (mpeg2dec);
/* fall through */
#endif
case STATE_SEQUENCE:
ret = handle_sequence (mpeg2dec, info);
/* if there is an error handling the sequence
* reset the decoder, maybe something more elegant
* could be done.
*/
if (ret == GST_FLOW_ERROR) {
GST_VIDEO_DECODER_ERROR (decoder, 1, STREAM, DECODE,
("decoding error"), ("Bad sequence header"), ret);
gst_video_decoder_drop_frame (decoder, frame);
gst_mpeg2dec_flush (decoder);
goto done;
}
break;
case STATE_SEQUENCE_REPEATED:
GST_DEBUG_OBJECT (mpeg2dec, "sequence repeated");
break;
case STATE_GOP:
GST_DEBUG_OBJECT (mpeg2dec, "gop");
break;
case STATE_PICTURE:
ret = handle_picture (mpeg2dec, info, frame);
break;
case STATE_SLICE_1ST:
GST_LOG_OBJECT (mpeg2dec, "1st slice of frame encountered");
break;
case STATE_PICTURE_2ND:
GST_LOG_OBJECT (mpeg2dec,
"Second picture header encountered. Decoding 2nd field");
break;
#if MPEG2_RELEASE >= MPEG2_VERSION (0, 4, 0)
case STATE_INVALID_END:
GST_DEBUG_OBJECT (mpeg2dec, "invalid end");
#endif
case STATE_END:
GST_DEBUG_OBJECT (mpeg2dec, "end");
case STATE_SLICE:
GST_DEBUG_OBJECT (mpeg2dec, "display_fbuf:%p, discard_fbuf:%p",
info->display_fbuf, info->discard_fbuf);
if (info->display_fbuf && info->display_fbuf->id) {
ret = handle_slice (mpeg2dec, info);
} else {
GST_DEBUG_OBJECT (mpeg2dec, "no picture to display");
}
if (info->discard_fbuf && info->discard_fbuf->id)
gst_mpeg2dec_discard_buffer (mpeg2dec,
GPOINTER_TO_INT (info->discard_fbuf->id) - 1);
if (state != STATE_SLICE) {
gst_mpeg2dec_clear_buffers (mpeg2dec);
}
break;
case STATE_BUFFER:
done = TRUE;
break;
/* error */
case STATE_INVALID:
GST_VIDEO_DECODER_ERROR (decoder, 1, STREAM, DECODE,
("decoding error"), ("Reached libmpeg2 invalid state"), ret);
continue;
default:
GST_ERROR_OBJECT (mpeg2dec, "Unknown libmpeg2 state %d, FIXME", state);
ret = GST_FLOW_OK;
gst_video_codec_frame_unref (frame);
goto done;
}
if (ret != GST_FLOW_OK) {
GST_DEBUG_OBJECT (mpeg2dec, "exit loop, reason %s",
gst_flow_get_name (ret));
break;
}
}
gst_video_codec_frame_unref (frame);
done:
gst_buffer_unmap (buf, &minfo);
gst_buffer_unref (buf);
return ret;
}
