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ffmpeg/libavcodec/mpv_reconstruct_mb_template.c

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/*
* MPEG macroblock reconstruction
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* 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
*/
#define NOT_MPEG12 0
#define MAY_BE_MPEG12 1
#define DEFINITELY_MPEG12 2
/* put block[] to dest[] */
static inline void put_dct(MpegEncContext *s,
int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
{
s->dct_unquantize_intra(s, block, i, qscale);
s->idsp.idct_put(dest, line_size, block);
}
static inline void add_dequant_dct(MpegEncContext *s,
int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
{
if (s->block_last_index[i] >= 0) {
s->dct_unquantize_inter(s, block, i, qscale);
s->idsp.idct_add(dest, line_size, block);
}
}
/* generic function called after a macroblock has been parsed by the
decoder or after it has been encoded by the encoder.
Important variables used:
s->mb_intra : true if intra macroblock
s->mv_dir : motion vector direction
s->mv_type : motion vector type
s->mv : motion vector
s->interlaced_dct : true if interlaced dct used (mpeg2)
*/
static av_always_inline
void mpv_reconstruct_mb_internal(MpegEncContext *s, int16_t block[12][64],
int lowres_flag, int is_mpeg12)
{
#define IS_MPEG12(s) (is_mpeg12 == MAY_BE_MPEG12 ? ((s)->out_format == FMT_MPEG1) : is_mpeg12)
const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
s->cur_pic.qscale_table[mb_xy] = s->qscale;
/* update DC predictors for P macroblocks */
if (!s->mb_intra) {
if (is_mpeg12 != DEFINITELY_MPEG12 && (s->h263_pred || s->h263_aic)) {
if (s->mbintra_table[mb_xy])
ff_clean_intra_table_entries(s);
} else {
s->last_dc[0] =
s->last_dc[1] =
s->last_dc[2] = 128 << s->intra_dc_precision;
}
} else if (is_mpeg12 != DEFINITELY_MPEG12 && (s->h263_pred || s->h263_aic))
s->mbintra_table[mb_xy] = 1;
#if IS_ENCODER
if ((s->avctx->flags & AV_CODEC_FLAG_PSNR) || s->frame_skip_threshold || s->frame_skip_factor ||
!((s->intra_only || s->pict_type == AV_PICTURE_TYPE_B) &&
s->avctx->mb_decision != FF_MB_DECISION_RD)) // FIXME precalc
#endif /* IS_ENCODER */
{
uint8_t *dest_y, *dest_cb, *dest_cr;
int dct_linesize, dct_offset;
const int linesize = s->cur_pic.linesize[0]; //not s->linesize as this would be wrong for field pics
const int uvlinesize = s->cur_pic.linesize[1];
const int readable = IS_ENCODER || lowres_flag || s->pict_type != AV_PICTURE_TYPE_B;
const int block_size = lowres_flag ? 8 >> s->avctx->lowres : 8;
/* avoid copy if macroblock skipped in last frame too */
/* skip only during decoding as we might trash the buffers during encoding a bit */
if (!IS_ENCODER) {
uint8_t *mbskip_ptr = &s->mbskip_table[mb_xy];
if (s->mb_skipped) {
s->mb_skipped = 0;
av_assert2(s->pict_type!=AV_PICTURE_TYPE_I);
*mbskip_ptr = 1;
} else if (!s->cur_pic.reference) {
*mbskip_ptr = 1;
} else{
*mbskip_ptr = 0; /* not skipped */
}
}
dct_linesize = linesize << s->interlaced_dct;
dct_offset = s->interlaced_dct ? linesize : linesize * block_size;
if (readable) {
dest_y = s->dest[0];
dest_cb = s->dest[1];
dest_cr = s->dest[2];
} else {
dest_y = s->sc.b_scratchpad;
dest_cb = s->sc.b_scratchpad + 16 * linesize;
dest_cr = s->sc.b_scratchpad + 32 * linesize;
}
if (!s->mb_intra) {
/* motion handling */
/* decoding or more than one mb_type (MC was already done otherwise) */
#if !IS_ENCODER
if (HAVE_THREADS && is_mpeg12 != DEFINITELY_MPEG12 &&
s->avctx->active_thread_type & FF_THREAD_FRAME) {
if (s->mv_dir & MV_DIR_FORWARD) {
ff_thread_progress_await(&s->last_pic.ptr->progress,
lowest_referenced_row(s, 0));
}
if (s->mv_dir & MV_DIR_BACKWARD) {
ff_thread_progress_await(&s->next_pic.ptr->progress,
lowest_referenced_row(s, 1));
}
}
if (lowres_flag) {
const h264_chroma_mc_func *op_pix = s->h264chroma.put_h264_chroma_pixels_tab;
if (s->mv_dir & MV_DIR_FORWARD) {
MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, s->last_pic.data, op_pix);
op_pix = s->h264chroma.avg_h264_chroma_pixels_tab;
}
if (s->mv_dir & MV_DIR_BACKWARD) {
MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, s->next_pic.data, op_pix);
}
} else {
const op_pixels_func (*op_pix)[4];
const qpel_mc_func (*op_qpix)[16];
if ((is_mpeg12 == DEFINITELY_MPEG12 || !s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
op_pix = s->hdsp.put_pixels_tab;
op_qpix = s->qdsp.put_qpel_pixels_tab;
} else {
op_pix = s->hdsp.put_no_rnd_pixels_tab;
op_qpix = s->qdsp.put_no_rnd_qpel_pixels_tab;
}
if (s->mv_dir & MV_DIR_FORWARD) {
ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_pic.data, op_pix, op_qpix);
op_pix = s->hdsp.avg_pixels_tab;
op_qpix = s->qdsp.avg_qpel_pixels_tab;
}
if (s->mv_dir & MV_DIR_BACKWARD) {
ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_pic.data, op_pix, op_qpix);
}
}
/* skip dequant / idct if we are really late ;) */
if (s->avctx->skip_idct) {
if( (s->avctx->skip_idct >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B)
||(s->avctx->skip_idct >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I)
|| s->avctx->skip_idct >= AVDISCARD_ALL)
goto skip_idct;
}
/* add dct residue */
if (!(IS_MPEG12(s) || s->msmpeg4_version ||
(s->codec_id == AV_CODEC_ID_MPEG4 && !s->mpeg_quant)))
#endif /* !IS_ENCODER */
{
add_dequant_dct(s, block[0], 0, dest_y , dct_linesize, s->qscale);
add_dequant_dct(s, block[1], 1, dest_y + block_size, dct_linesize, s->qscale);
add_dequant_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize, s->qscale);
add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
if (s->chroma_y_shift) {
add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
} else {
dct_linesize >>= 1;
dct_offset >>= 1;
add_dequant_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
add_dequant_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
}
}
}
#if !IS_ENCODER
else if (is_mpeg12 == DEFINITELY_MPEG12 || (s->codec_id != AV_CODEC_ID_WMV2)) {
add_dct(s, block[0], 0, dest_y , dct_linesize);
add_dct(s, block[1], 1, dest_y + block_size, dct_linesize);
add_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize);
add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
if (s->chroma_y_shift) {//Chroma420
add_dct(s, block[4], 4, dest_cb, uvlinesize);
add_dct(s, block[5], 5, dest_cr, uvlinesize);
} else {
//chroma422
dct_linesize = uvlinesize << s->interlaced_dct;
dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
add_dct(s, block[4], 4, dest_cb, dct_linesize);
add_dct(s, block[5], 5, dest_cr, dct_linesize);
add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
if (!s->chroma_x_shift) {//Chroma444
add_dct(s, block[8], 8, dest_cb+block_size, dct_linesize);
add_dct(s, block[9], 9, dest_cr+block_size, dct_linesize);
add_dct(s, block[10], 10, dest_cb+block_size+dct_offset, dct_linesize);
add_dct(s, block[11], 11, dest_cr+block_size+dct_offset, dct_linesize);
}
}
} //fi gray
} else if (CONFIG_WMV2_DECODER) {
ff_wmv2_add_mb(s, block, dest_y, dest_cb, dest_cr);
}
#endif /* !IS_ENCODER */
} else {
#if !IS_ENCODER
/* Only MPEG-4 Simple Studio Profile is supported in > 8-bit mode.
TODO: Integrate 10-bit properly into mpegvideo.c so that ER works properly */
if (is_mpeg12 != DEFINITELY_MPEG12 && CONFIG_MPEG4_DECODER &&
/* s->codec_id == AV_CODEC_ID_MPEG4 && */
s->avctx->bits_per_raw_sample > 8) {
ff_mpeg4_decode_studio(s, dest_y, dest_cb, dest_cr, block_size,
uvlinesize, dct_linesize, dct_offset);
} else if (!IS_MPEG12(s))
#endif /* !IS_ENCODER */
{
/* dct only in intra block */
put_dct(s, block[0], 0, dest_y , dct_linesize, s->qscale);
put_dct(s, block[1], 1, dest_y + block_size, dct_linesize, s->qscale);
put_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize, s->qscale);
put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
if (s->chroma_y_shift) {
put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
} else {
dct_offset >>=1;
dct_linesize >>=1;
put_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
put_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
}
}
}
#if !IS_ENCODER
else {
s->idsp.idct_put(dest_y, dct_linesize, block[0]);
s->idsp.idct_put(dest_y + block_size, dct_linesize, block[1]);
s->idsp.idct_put(dest_y + dct_offset, dct_linesize, block[2]);
s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
if (s->chroma_y_shift) {
s->idsp.idct_put(dest_cb, uvlinesize, block[4]);
s->idsp.idct_put(dest_cr, uvlinesize, block[5]);
} else {
dct_linesize = uvlinesize << s->interlaced_dct;
dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
s->idsp.idct_put(dest_cb, dct_linesize, block[4]);
s->idsp.idct_put(dest_cr, dct_linesize, block[5]);
s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
if (!s->chroma_x_shift) { //Chroma444
s->idsp.idct_put(dest_cb + block_size, dct_linesize, block[8]);
s->idsp.idct_put(dest_cr + block_size, dct_linesize, block[9]);
s->idsp.idct_put(dest_cb + block_size + dct_offset, dct_linesize, block[10]);
s->idsp.idct_put(dest_cr + block_size + dct_offset, dct_linesize, block[11]);
}
}
} //gray
}
}
skip_idct:
if (!readable) {
s->hdsp.put_pixels_tab[0][0](s->dest[0], dest_y, linesize, 16);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize, 16 >> s->chroma_y_shift);
s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[2], dest_cr, uvlinesize, 16 >> s->chroma_y_shift);
}
#endif /* !IS_ENCODER */
}
}
}
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