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/*
* MPEG-4 / H.263 HW decode acceleration through VA API
*
* Copyright (C) 2008-2009 Splitted-Desktop Systems
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "h263.h"
#include "internal.h"
#include "mpeg4video.h"
#include "mpegvideo.h"
#include "vaapi_decode.h"
/** Reconstruct bitstream intra_dc_vlc_thr */
static int mpeg4_get_intra_dc_vlc_thr(Mpeg4DecContext *s)
{
switch (s->intra_dc_threshold) {
case 99: return 0;
case 13: return 1;
case 15: return 2;
case 17: return 3;
case 19: return 4;
case 21: return 5;
case 23: return 6;
case 0: return 7;
}
return 0;
}
static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
{
Mpeg4DecContext *ctx = avctx->priv_data;
MpegEncContext *s = &ctx->m;
VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
VAPictureParameterBufferMPEG4 pic_param;
int i, err;
pic->output_surface = ff_vaapi_get_surface_id(s->current_picture_ptr->f);
pic_param = (VAPictureParameterBufferMPEG4) {
.vop_width = s->width,
.vop_height = s->height,
.forward_reference_picture = VA_INVALID_ID,
.backward_reference_picture = VA_INVALID_ID,
.vol_fields.bits = {
.short_video_header = avctx->codec->id == AV_CODEC_ID_H263,
.chroma_format = CHROMA_420,
.interlaced = !s->progressive_sequence,
.obmc_disable = 1,
.sprite_enable = ctx->vol_sprite_usage,
.sprite_warping_accuracy = s->sprite_warping_accuracy,
.quant_type = s->mpeg_quant,
.quarter_sample = s->quarter_sample,
.data_partitioned = s->data_partitioning,
.reversible_vlc = ctx->rvlc,
.resync_marker_disable = !ctx->resync_marker,
},
.no_of_sprite_warping_points = ctx->num_sprite_warping_points,
.quant_precision = s->quant_precision,
.vop_fields.bits = {
.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I,
.backward_reference_vop_coding_type =
s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f->pict_type - AV_PICTURE_TYPE_I : 0,
.vop_rounding_type = s->no_rounding,
.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(ctx),
.top_field_first = s->top_field_first,
.alternate_vertical_scan_flag = s->alternate_scan,
},
.vop_fcode_forward = s->f_code,
.vop_fcode_backward = s->b_code,
.vop_time_increment_resolution = avctx->framerate.num,
.num_macroblocks_in_gob = s->mb_width * H263_GOB_HEIGHT(s->height),
.num_gobs_in_vop =
(s->mb_width * s->mb_height) / (s->mb_width * H263_GOB_HEIGHT(s->height)),
.TRB = s->pb_time,
.TRD = s->pp_time,
};
for (i = 0; i < ctx->num_sprite_warping_points && i < 3; i++) {
pic_param.sprite_trajectory_du[i] = ctx->sprite_traj[i][0];
pic_param.sprite_trajectory_dv[i] = ctx->sprite_traj[i][1];
}
if (s->pict_type == AV_PICTURE_TYPE_B)
pic_param.backward_reference_picture = ff_vaapi_get_surface_id(s->next_picture.f);
if (s->pict_type != AV_PICTURE_TYPE_I)
pic_param.forward_reference_picture = ff_vaapi_get_surface_id(s->last_picture.f);
err = ff_vaapi_decode_make_param_buffer(avctx, pic,
VAPictureParameterBufferType,
&pic_param, sizeof(pic_param));
if (err < 0)
goto fail;
/* Only the first inverse quantisation method uses the weighting matrices */
if (pic_param.vol_fields.bits.quant_type) {
VAIQMatrixBufferMPEG4 iq_matrix;
iq_matrix.load_intra_quant_mat = 1;
iq_matrix.load_non_intra_quant_mat = 1;
for (i = 0; i < 64; i++) {
int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
iq_matrix.intra_quant_mat[i] = s->intra_matrix[n];
iq_matrix.non_intra_quant_mat[i] = s->inter_matrix[n];
}
err = ff_vaapi_decode_make_param_buffer(avctx, pic,
VAIQMatrixBufferType,
&iq_matrix, sizeof(iq_matrix));
if (err < 0)
goto fail;
}
return 0;
fail:
ff_vaapi_decode_cancel(avctx, pic);
return err;
}
static int vaapi_mpeg4_end_frame(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
int ret;
ret = ff_vaapi_decode_issue(avctx, pic);
if (ret < 0)
goto fail;
ff_mpeg_draw_horiz_band(s, 0, s->avctx->height);
fail:
return ret;
}
static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
{
MpegEncContext *s = avctx->priv_data;
VAAPIDecodePicture *pic = s->current_picture_ptr->hwaccel_picture_private;
VASliceParameterBufferMPEG4 slice_param;
int err;
/* video_plane_with_short_video_header() contains all GOBs
* in-order, and this is what VA API (Intel backend) expects: only
* a single slice param. So fake macroblock_number for Libav so
* that we don't call vaapi_mpeg4_decode_slice() again
*/
if (avctx->codec->id == AV_CODEC_ID_H263)
size = s->gb.buffer_end - buffer;
slice_param = (VASliceParameterBufferMPEG4) {
.slice_data_size = size,
.slice_data_offset = 0,
.slice_data_flag = VA_SLICE_DATA_FLAG_ALL,
.macroblock_offset = get_bits_count(&s->gb) % 8,
.macroblock_number = s->mb_y * s->mb_width + s->mb_x,
.quant_scale = s->qscale,
};
if (avctx->codec->id == AV_CODEC_ID_H263)
s->mb_y = s->mb_height;
err = ff_vaapi_decode_make_slice_buffer(avctx, pic,
&slice_param, sizeof(slice_param),
buffer, size);
if (err < 0) {
ff_vaapi_decode_cancel(avctx, pic);
return err;
}
return 0;
}
#if CONFIG_MPEG4_VAAPI_HWACCEL
AVHWAccel ff_mpeg4_vaapi_hwaccel = {
.name = "mpeg4_vaapi",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG4,
.pix_fmt = AV_PIX_FMT_VAAPI,
.start_frame = &vaapi_mpeg4_start_frame,
.end_frame = &vaapi_mpeg4_end_frame,
.decode_slice = &vaapi_mpeg4_decode_slice,
.frame_priv_data_size = sizeof(VAAPIDecodePicture),
.init = &ff_vaapi_decode_init,
.uninit = &ff_vaapi_decode_uninit,
.priv_data_size = sizeof(VAAPIDecodeContext),
};
#endif
#if CONFIG_H263_VAAPI_HWACCEL
AVHWAccel ff_h263_vaapi_hwaccel = {
.name = "h263_vaapi",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H263,
.pix_fmt = AV_PIX_FMT_VAAPI,
.start_frame = &vaapi_mpeg4_start_frame,
.end_frame = &vaapi_mpeg4_end_frame,
.decode_slice = &vaapi_mpeg4_decode_slice,
.frame_priv_data_size = sizeof(VAAPIDecodePicture),
.init = &ff_vaapi_decode_init,
.uninit = &ff_vaapi_decode_uninit,
.priv_data_size = sizeof(VAAPIDecodeContext),
};
#endif
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