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1d9aac9c4b
Decoders that might use quarter pixel motion estimation (namely MPEG-4 as well as the VC-1 family) currently use MpegEncContext.me.qpel_(put|avg) as scratch space for pointers to arrays of function pointers. (MotionEstContext contains such pointers as it supports quarter pixel motion estimation.) The MotionEstContext is unused apart from this for the decoding part of mpegvideo. Using the context at all is for decoding is actually unnecessary and easily avoided: All codecs with quarter pixels set me.qpel_avg to qdsp.avg_qpel_pixels_tab, so one can just unconditionally use this in ff_mpv_reconstruct_mb(). MPEG-4 sets qpel_put to qdsp.put_qpel_pixels_tab or to qdsp.put_no_rnd_qpel_pixels_tab based upon whether the current frame is a b-frame with no_rounding or not, while the VC-1-based decoders set it to qdsp.put_qpel_pixels_tab unconditionally. Given that no_rounding is always zero for VC-1, using the same check for VC-1 as well as for MPEG-4 would work. Since ff_mpv_reconstruct_mb() already has exactly the right check (for hpeldsp), it can simply be reused. (This change will result in ff_mpv_motion() receiving a pointer to an array of NULL function pointers instead of a NULL pointer for codecs without qpeldsp (like MPEG-1/2). It doesn't matter.) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
304 lines
15 KiB
C
304 lines
15 KiB
C
/*
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* MPEG macroblock reconstruction
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* Copyright (c) 2000,2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define NOT_MPEG12 0
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#define MAY_BE_MPEG12 1
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#define DEFINITELY_MPEG12 2
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/* put block[] to dest[] */
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static inline void put_dct(MpegEncContext *s,
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int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
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{
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s->dct_unquantize_intra(s, block, i, qscale);
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s->idsp.idct_put(dest, line_size, block);
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}
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static inline void add_dequant_dct(MpegEncContext *s,
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int16_t *block, int i, uint8_t *dest, int line_size, int qscale)
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{
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if (s->block_last_index[i] >= 0) {
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s->dct_unquantize_inter(s, block, i, qscale);
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s->idsp.idct_add(dest, line_size, block);
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}
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}
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/* generic function called after a macroblock has been parsed by the
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decoder or after it has been encoded by the encoder.
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Important variables used:
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s->mb_intra : true if intra macroblock
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s->mv_dir : motion vector direction
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s->mv_type : motion vector type
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s->mv : motion vector
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s->interlaced_dct : true if interlaced dct used (mpeg2)
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*/
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static av_always_inline
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void mpv_reconstruct_mb_internal(MpegEncContext *s, int16_t block[12][64],
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int lowres_flag, int is_mpeg12)
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{
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#define IS_MPEG12(s) (is_mpeg12 == MAY_BE_MPEG12 ? ((s)->out_format == FMT_MPEG1) : is_mpeg12)
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const int mb_xy = s->mb_y * s->mb_stride + s->mb_x;
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s->current_picture.qscale_table[mb_xy] = s->qscale;
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/* update DC predictors for P macroblocks */
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if (!s->mb_intra) {
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if (is_mpeg12 != DEFINITELY_MPEG12 && (s->h263_pred || s->h263_aic)) {
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if (s->mbintra_table[mb_xy])
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ff_clean_intra_table_entries(s);
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} else {
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s->last_dc[0] =
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s->last_dc[1] =
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s->last_dc[2] = 128 << s->intra_dc_precision;
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}
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} else if (is_mpeg12 != DEFINITELY_MPEG12 && (s->h263_pred || s->h263_aic))
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s->mbintra_table[mb_xy] = 1;
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#if IS_ENCODER
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if ((s->avctx->flags & AV_CODEC_FLAG_PSNR) || s->frame_skip_threshold || s->frame_skip_factor ||
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!((s->intra_only || s->pict_type == AV_PICTURE_TYPE_B) &&
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s->avctx->mb_decision != FF_MB_DECISION_RD)) // FIXME precalc
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#endif /* IS_ENCODER */
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{
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uint8_t *dest_y, *dest_cb, *dest_cr;
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int dct_linesize, dct_offset;
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const int linesize = s->current_picture.f->linesize[0]; //not s->linesize as this would be wrong for field pics
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const int uvlinesize = s->current_picture.f->linesize[1];
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const int readable = IS_ENCODER || lowres_flag || s->pict_type != AV_PICTURE_TYPE_B;
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const int block_size = lowres_flag ? 8 >> s->avctx->lowres : 8;
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/* avoid copy if macroblock skipped in last frame too */
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/* skip only during decoding as we might trash the buffers during encoding a bit */
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if (!IS_ENCODER) {
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uint8_t *mbskip_ptr = &s->mbskip_table[mb_xy];
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if (s->mb_skipped) {
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s->mb_skipped = 0;
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av_assert2(s->pict_type!=AV_PICTURE_TYPE_I);
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*mbskip_ptr = 1;
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} else if(!s->current_picture.reference) {
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*mbskip_ptr = 1;
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} else{
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*mbskip_ptr = 0; /* not skipped */
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}
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}
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dct_linesize = linesize << s->interlaced_dct;
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dct_offset = s->interlaced_dct ? linesize : linesize * block_size;
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if (readable) {
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dest_y = s->dest[0];
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dest_cb = s->dest[1];
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dest_cr = s->dest[2];
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} else {
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dest_y = s->sc.b_scratchpad;
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dest_cb = s->sc.b_scratchpad + 16 * linesize;
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dest_cr = s->sc.b_scratchpad + 32 * linesize;
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}
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if (!s->mb_intra) {
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/* motion handling */
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/* decoding or more than one mb_type (MC was already done otherwise) */
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#if !IS_ENCODER
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if (HAVE_THREADS && is_mpeg12 != DEFINITELY_MPEG12 &&
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s->avctx->active_thread_type & FF_THREAD_FRAME) {
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if (s->mv_dir & MV_DIR_FORWARD) {
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ff_thread_await_progress(&s->last_picture_ptr->tf,
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lowest_referenced_row(s, 0), 0);
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}
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if (s->mv_dir & MV_DIR_BACKWARD) {
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ff_thread_await_progress(&s->next_picture_ptr->tf,
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lowest_referenced_row(s, 1), 0);
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}
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}
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if (lowres_flag) {
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const h264_chroma_mc_func *op_pix = s->h264chroma.put_h264_chroma_pixels_tab;
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if (s->mv_dir & MV_DIR_FORWARD) {
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MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix);
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op_pix = s->h264chroma.avg_h264_chroma_pixels_tab;
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}
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if (s->mv_dir & MV_DIR_BACKWARD) {
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MPV_motion_lowres(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix);
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}
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} else {
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op_pixels_func (*op_pix)[4];
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qpel_mc_func (*op_qpix)[16];
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if ((is_mpeg12 == DEFINITELY_MPEG12 || !s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
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op_pix = s->hdsp.put_pixels_tab;
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op_qpix = s->qdsp.put_qpel_pixels_tab;
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} else {
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op_pix = s->hdsp.put_no_rnd_pixels_tab;
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op_qpix = s->qdsp.put_no_rnd_qpel_pixels_tab;
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}
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if (s->mv_dir & MV_DIR_FORWARD) {
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ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 0, s->last_picture.f->data, op_pix, op_qpix);
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op_pix = s->hdsp.avg_pixels_tab;
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op_qpix = s->qdsp.avg_qpel_pixels_tab;
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}
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if (s->mv_dir & MV_DIR_BACKWARD) {
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ff_mpv_motion(s, dest_y, dest_cb, dest_cr, 1, s->next_picture.f->data, op_pix, op_qpix);
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}
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}
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/* skip dequant / idct if we are really late ;) */
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if (s->avctx->skip_idct) {
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if( (s->avctx->skip_idct >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B)
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||(s->avctx->skip_idct >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I)
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|| s->avctx->skip_idct >= AVDISCARD_ALL)
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goto skip_idct;
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}
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/* add dct residue */
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if (!(IS_MPEG12(s) || s->msmpeg4_version ||
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(s->codec_id == AV_CODEC_ID_MPEG4 && !s->mpeg_quant)))
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#endif /* !IS_ENCODER */
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{
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add_dequant_dct(s, block[0], 0, dest_y , dct_linesize, s->qscale);
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add_dequant_dct(s, block[1], 1, dest_y + block_size, dct_linesize, s->qscale);
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add_dequant_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize, s->qscale);
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add_dequant_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
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if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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if (s->chroma_y_shift) {
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add_dequant_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
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add_dequant_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
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} else {
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dct_linesize >>= 1;
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dct_offset >>= 1;
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add_dequant_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
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add_dequant_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
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add_dequant_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
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add_dequant_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
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}
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}
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}
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#if !IS_ENCODER
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else if (is_mpeg12 == DEFINITELY_MPEG12 || (s->codec_id != AV_CODEC_ID_WMV2)) {
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add_dct(s, block[0], 0, dest_y , dct_linesize);
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add_dct(s, block[1], 1, dest_y + block_size, dct_linesize);
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add_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize);
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add_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize);
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if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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if (s->chroma_y_shift) {//Chroma420
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add_dct(s, block[4], 4, dest_cb, uvlinesize);
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add_dct(s, block[5], 5, dest_cr, uvlinesize);
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} else {
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//chroma422
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dct_linesize = uvlinesize << s->interlaced_dct;
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dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
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add_dct(s, block[4], 4, dest_cb, dct_linesize);
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add_dct(s, block[5], 5, dest_cr, dct_linesize);
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add_dct(s, block[6], 6, dest_cb+dct_offset, dct_linesize);
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add_dct(s, block[7], 7, dest_cr+dct_offset, dct_linesize);
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if (!s->chroma_x_shift) {//Chroma444
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add_dct(s, block[8], 8, dest_cb+block_size, dct_linesize);
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add_dct(s, block[9], 9, dest_cr+block_size, dct_linesize);
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add_dct(s, block[10], 10, dest_cb+block_size+dct_offset, dct_linesize);
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add_dct(s, block[11], 11, dest_cr+block_size+dct_offset, dct_linesize);
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}
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}
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} //fi gray
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} else if (CONFIG_WMV2_DECODER) {
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ff_wmv2_add_mb(s, block, dest_y, dest_cb, dest_cr);
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}
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#endif /* !IS_ENCODER */
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} else {
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#if !IS_ENCODER
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/* Only MPEG-4 Simple Studio Profile is supported in > 8-bit mode.
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TODO: Integrate 10-bit properly into mpegvideo.c so that ER works properly */
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if (is_mpeg12 != DEFINITELY_MPEG12 && CONFIG_MPEG4_DECODER &&
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/* s->codec_id == AV_CODEC_ID_MPEG4 && */
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s->avctx->bits_per_raw_sample > 8) {
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ff_mpeg4_decode_studio(s, dest_y, dest_cb, dest_cr, block_size,
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uvlinesize, dct_linesize, dct_offset);
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} else if (!IS_MPEG12(s))
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#endif /* !IS_ENCODER */
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{
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/* dct only in intra block */
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put_dct(s, block[0], 0, dest_y , dct_linesize, s->qscale);
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put_dct(s, block[1], 1, dest_y + block_size, dct_linesize, s->qscale);
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put_dct(s, block[2], 2, dest_y + dct_offset , dct_linesize, s->qscale);
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put_dct(s, block[3], 3, dest_y + dct_offset + block_size, dct_linesize, s->qscale);
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if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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if (s->chroma_y_shift) {
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put_dct(s, block[4], 4, dest_cb, uvlinesize, s->chroma_qscale);
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put_dct(s, block[5], 5, dest_cr, uvlinesize, s->chroma_qscale);
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} else {
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dct_offset >>=1;
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dct_linesize >>=1;
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put_dct(s, block[4], 4, dest_cb, dct_linesize, s->chroma_qscale);
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put_dct(s, block[5], 5, dest_cr, dct_linesize, s->chroma_qscale);
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put_dct(s, block[6], 6, dest_cb + dct_offset, dct_linesize, s->chroma_qscale);
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put_dct(s, block[7], 7, dest_cr + dct_offset, dct_linesize, s->chroma_qscale);
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}
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}
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}
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#if !IS_ENCODER
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else {
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s->idsp.idct_put(dest_y, dct_linesize, block[0]);
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s->idsp.idct_put(dest_y + block_size, dct_linesize, block[1]);
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s->idsp.idct_put(dest_y + dct_offset, dct_linesize, block[2]);
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s->idsp.idct_put(dest_y + dct_offset + block_size, dct_linesize, block[3]);
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if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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if (s->chroma_y_shift) {
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s->idsp.idct_put(dest_cb, uvlinesize, block[4]);
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s->idsp.idct_put(dest_cr, uvlinesize, block[5]);
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} else {
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dct_linesize = uvlinesize << s->interlaced_dct;
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dct_offset = s->interlaced_dct ? uvlinesize : uvlinesize*block_size;
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s->idsp.idct_put(dest_cb, dct_linesize, block[4]);
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s->idsp.idct_put(dest_cr, dct_linesize, block[5]);
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s->idsp.idct_put(dest_cb + dct_offset, dct_linesize, block[6]);
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s->idsp.idct_put(dest_cr + dct_offset, dct_linesize, block[7]);
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if (!s->chroma_x_shift) { //Chroma444
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s->idsp.idct_put(dest_cb + block_size, dct_linesize, block[8]);
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s->idsp.idct_put(dest_cr + block_size, dct_linesize, block[9]);
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s->idsp.idct_put(dest_cb + block_size + dct_offset, dct_linesize, block[10]);
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s->idsp.idct_put(dest_cr + block_size + dct_offset, dct_linesize, block[11]);
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}
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}
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} //gray
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}
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}
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skip_idct:
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if (!readable) {
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s->hdsp.put_pixels_tab[0][0](s->dest[0], dest_y, linesize, 16);
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if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
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s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[1], dest_cb, uvlinesize, 16 >> s->chroma_y_shift);
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s->hdsp.put_pixels_tab[s->chroma_x_shift][0](s->dest[2], dest_cr, uvlinesize, 16 >> s->chroma_y_shift);
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}
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#endif /* !IS_ENCODER */
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}
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}
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}
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