FFmpeg/libavcodec/vaapi_mpeg2.c
Stefano Sabatini 72415b2adb Define AVMediaType enum, and use it instead of enum CodecType, which
is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-03-30 23:30:55 +00:00

152 lines
6.4 KiB
C

/*
* MPEG-2 HW decode acceleration through VA API
*
* Copyright (C) 2008-2009 Splitted-Desktop Systems
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "vaapi_internal.h"
#include "dsputil.h"
/** Reconstruct bitstream f_code */
static inline int mpeg2_get_f_code(MpegEncContext *s)
{
return ((s->mpeg_f_code[0][0] << 12) | (s->mpeg_f_code[0][1] << 8) |
(s->mpeg_f_code[1][0] << 4) | s->mpeg_f_code[1][1]);
}
/** Determine frame start: first field for field picture or frame picture */
static inline int mpeg2_get_is_frame_start(MpegEncContext *s)
{
return s->first_field || s->picture_structure == PICT_FRAME;
}
static int vaapi_mpeg2_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
{
struct MpegEncContext * const s = avctx->priv_data;
struct vaapi_context * const vactx = avctx->hwaccel_context;
VAPictureParameterBufferMPEG2 *pic_param;
VAIQMatrixBufferMPEG2 *iq_matrix;
int i;
dprintf(avctx, "vaapi_mpeg2_start_frame()\n");
vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG2);
/* Fill in VAPictureParameterBufferMPEG2 */
pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG2));
if (!pic_param)
return -1;
pic_param->horizontal_size = s->width;
pic_param->vertical_size = s->height;
pic_param->forward_reference_picture = VA_INVALID_ID;
pic_param->backward_reference_picture = VA_INVALID_ID;
pic_param->picture_coding_type = s->pict_type;
pic_param->f_code = mpeg2_get_f_code(s);
pic_param->picture_coding_extension.value = 0; /* reset all bits */
pic_param->picture_coding_extension.bits.intra_dc_precision = s->intra_dc_precision;
pic_param->picture_coding_extension.bits.picture_structure = s->picture_structure;
pic_param->picture_coding_extension.bits.top_field_first = s->top_field_first;
pic_param->picture_coding_extension.bits.frame_pred_frame_dct = s->frame_pred_frame_dct;
pic_param->picture_coding_extension.bits.concealment_motion_vectors = s->concealment_motion_vectors;
pic_param->picture_coding_extension.bits.q_scale_type = s->q_scale_type;
pic_param->picture_coding_extension.bits.intra_vlc_format = s->intra_vlc_format;
pic_param->picture_coding_extension.bits.alternate_scan = s->alternate_scan;
pic_param->picture_coding_extension.bits.repeat_first_field = s->repeat_first_field;
pic_param->picture_coding_extension.bits.progressive_frame = s->progressive_frame;
pic_param->picture_coding_extension.bits.is_first_field = mpeg2_get_is_frame_start(s);
switch (s->pict_type) {
case FF_B_TYPE:
pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture);
// fall-through
case FF_P_TYPE:
pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture);
break;
}
/* Fill in VAIQMatrixBufferMPEG2 */
iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG2));
if (!iq_matrix)
return -1;
iq_matrix->load_intra_quantiser_matrix = 1;
iq_matrix->load_non_intra_quantiser_matrix = 1;
iq_matrix->load_chroma_intra_quantiser_matrix = 1;
iq_matrix->load_chroma_non_intra_quantiser_matrix = 1;
for (i = 0; i < 64; i++) {
int n = s->dsp.idct_permutation[ff_zigzag_direct[i]];
iq_matrix->intra_quantiser_matrix[i] = s->intra_matrix[n];
iq_matrix->non_intra_quantiser_matrix[i] = s->inter_matrix[n];
iq_matrix->chroma_intra_quantiser_matrix[i] = s->chroma_intra_matrix[n];
iq_matrix->chroma_non_intra_quantiser_matrix[i] = s->chroma_inter_matrix[n];
}
return 0;
}
static int vaapi_mpeg2_end_frame(AVCodecContext *avctx)
{
return ff_vaapi_common_end_frame(avctx->priv_data);
}
static int vaapi_mpeg2_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
{
MpegEncContext * const s = avctx->priv_data;
VASliceParameterBufferMPEG2 *slice_param;
GetBitContext gb;
uint32_t start_code, quantiser_scale_code, intra_slice_flag, macroblock_offset;
dprintf(avctx, "vaapi_mpeg2_decode_slice(): buffer %p, size %d\n", buffer, size);
/* Determine macroblock_offset */
init_get_bits(&gb, buffer, 8 * size);
start_code = get_bits(&gb, 32);
assert((start_code & 0xffffff00) == 0x00000100);
quantiser_scale_code = get_bits(&gb, 5);
intra_slice_flag = get_bits1(&gb);
if (intra_slice_flag) {
skip_bits(&gb, 8);
while (get_bits1(&gb) != 0)
skip_bits(&gb, 8);
}
macroblock_offset = get_bits_count(&gb);
/* Fill in VASliceParameterBufferMPEG2 */
slice_param = (VASliceParameterBufferMPEG2 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
if (!slice_param)
return -1;
slice_param->macroblock_offset = macroblock_offset;
slice_param->slice_horizontal_position = s->mb_x;
slice_param->slice_vertical_position = s->mb_y;
slice_param->quantiser_scale_code = quantiser_scale_code;
slice_param->intra_slice_flag = intra_slice_flag;
return 0;
}
AVHWAccel mpeg2_vaapi_hwaccel = {
.name = "mpeg2_vaapi",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_MPEG2VIDEO,
.pix_fmt = PIX_FMT_VAAPI_VLD,
.capabilities = 0,
.start_frame = vaapi_mpeg2_start_frame,
.end_frame = vaapi_mpeg2_end_frame,
.decode_slice = vaapi_mpeg2_decode_slice,
.priv_data_size = 0,
};