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decoder: hevc: Add Support for tiled video decoding

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Based up on the value of uniform_spacing_flag in Picture Parameter Set,
the tile column width and tile row height should be calculated.
Equations: 6-1, 6-2
Tiled video Descriptions: 7.3.2.3, 7.4.3.3
This commit is contained in:
Sreerenj Balachandran 2015-04-16 14:13:59 +03:00
parent 2ddfcd8bc3
commit baec8e35f4
1 changed files with 69 additions and 3 deletions
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72
gst-libs/gst/vaapi/gstvaapidecoder_h265.c
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@ -27,6 +27,7 @@
#include "sysdeps.h"
#include <string.h>
#include <math.h>
#include <gst/base/gstadapter.h>
#include <gst/codecparsers/gsth265parser.h>
#include "gstvaapidecoder_h265.h"
@ -1310,6 +1311,23 @@ parse_sps (GstVaapiDecoderH265 * decoder, GstVaapiDecoderUnit * unit)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static void
get_pic_width_height_in_ctbs (GstH265PPS * pps,
guint * PicWidthInCtbsY, guint * PicHeightInCtbsY)
{
gint MinCbLog2SizeY, CtbLog2SizeY, MinCbSizeY, CtbSizeY;
GstH265SPS *sps = pps->sps;
MinCbLog2SizeY = sps->log2_min_luma_coding_block_size_minus3 + 3;
CtbLog2SizeY = MinCbLog2SizeY + sps->log2_diff_max_min_luma_coding_block_size;
MinCbSizeY = 1 << MinCbLog2SizeY;
CtbSizeY = 1 << CtbLog2SizeY;
*PicWidthInCtbsY =
ceil ((double) sps->pic_width_in_luma_samples / (double) CtbSizeY);
*PicHeightInCtbsY =
ceil ((double) sps->pic_height_in_luma_samples / (double) CtbSizeY);
}
static GstVaapiDecoderStatus
parse_pps (GstVaapiDecoderH265 * decoder, GstVaapiDecoderUnit * unit)
@ -1318,16 +1336,60 @@ parse_pps (GstVaapiDecoderH265 * decoder, GstVaapiDecoderUnit * unit)
GstVaapiParserInfoH265 *const pi = unit->parsed_info;
GstH265PPS *const pps = &pi->data.pps;
GstH265ParserResult result;
guint col_width[19], row_height[21];
GST_DEBUG ("parse PPS");
priv->parser_state &= GST_H265_VIDEO_STATE_GOT_SPS;
memset (col_width, 0, sizeof (col_width));
memset (row_height, 0, sizeof (row_height));
memset (pps, 0, sizeof (GstH265PPS));
result = gst_h265_parser_parse_pps (priv->parser, &pi->nalu, pps);
if (result != GST_H265_PARSER_OK)
return get_status (result);
if (pps->tiles_enabled_flag) {
guint i;
guint PicWidthInCtbsY, PicHeightInCtbsY;
get_pic_width_height_in_ctbs (pps, &PicWidthInCtbsY, &PicHeightInCtbsY);
GST_DEBUG ("PicWidthInCtbsY %d PicHeightInCtbsY %d", PicWidthInCtbsY,
PicHeightInCtbsY);
/* Tile Scanning Conversion 6-3 and 6-4 */
if (pps->uniform_spacing_flag) {
for (i = 0; i <= pps->num_tile_columns_minus1; i++)
col_width[i] =
((i + 1) * PicWidthInCtbsY) / (pps->num_tile_columns_minus1 + 1) -
(i * PicWidthInCtbsY) / (pps->num_tile_columns_minus1 + 1);
for (i = 0; i <= pps->num_tile_rows_minus1; i++)
row_height[i] =
((i + 1) * PicHeightInCtbsY) / (pps->num_tile_rows_minus1 + 1) -
(i * PicHeightInCtbsY) / (pps->num_tile_rows_minus1 + 1);
} else {
col_width[pps->num_tile_columns_minus1] = PicWidthInCtbsY;
for (i = 0; i < pps->num_tile_columns_minus1; i++) {
col_width[i] = pps->column_width_minus1[i] + 1;
col_width[pps->num_tile_columns_minus1] -= col_width[i];
}
row_height[pps->num_tile_rows_minus1] = PicHeightInCtbsY;
for (i = 0; i < pps->num_tile_rows_minus1; i++) {
row_height[i] = pps->row_height_minus1[i] + 1;
row_height[pps->num_tile_rows_minus1] -= row_height[i];
}
}
for (i = 0; i <= pps->num_tile_columns_minus1; i++)
pps->column_width_minus1[i] = col_width[i] - 1;
for (i = 0; i <= pps->num_tile_rows_minus1; i++)
pps->row_height_minus1[i] = row_height[i] - 1;
}
priv->parser_state |= GST_H265_VIDEO_STATE_GOT_PPS;
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
@ -1812,10 +1874,14 @@ fill_picture (GstVaapiDecoderH265 * decoder, GstVaapiPictureH265 * picture)
COPY_FIELD (pps, log2_parallel_merge_level_minus2);
COPY_FIELD (pps, num_tile_columns_minus1);
COPY_FIELD (pps, num_tile_rows_minus1);
for (i = 0; i < 19; i++)
for (i = 0; i <= pps->num_tile_columns_minus1; i++)
pic_param->column_width_minus1[i] = pps->column_width_minus1[i];
for (i = 0; i < 21; i++)
for (; i < 19; i++)
pic_param->column_width_minus1[i] = 0;
for (i = 0; i <= pps->num_tile_rows_minus1; i++)
pic_param->row_height_minus1[i] = pps->row_height_minus1[i];
for (; i < 21; i++)
pic_param->row_height_minus1[i] = 0;
COPY_BFM (slice_parsing_fields, pps, lists_modification_present_flag);
COPY_BFM (slice_parsing_fields, sps, long_term_ref_pics_present_flag);