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FFmpeg/libavcodec/mpegvideo_dec.c
Andreas Rheinhardt 49b4ed7237 avcodec/mpegvideo_dec: Always initialize IDCTDSPContext during init 
It has currently not been done for H263, H263P and MPEG4.
Doing so avoids having to initialize the IDCT permutation
lateron when decoding packets in order to be able to parse
a quant matrix; it means that every mpegvideo decoder always
has an initialized IDCTDSPContext after init.
Initializing is done generically in ff_mpv_decode_init().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-10-05 22:05:21 +02:00

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/*
* Common mpeg video decoding code
* 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
*/
#include <limits.h>
#include "config_components.h"
#include "libavutil/avassert.h"
#include "libavutil/emms.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/video_enc_params.h"
#include "avcodec.h"
#include "h264chroma.h"
#include "internal.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodec.h"
#include "mpeg4videodec.h"
#include "thread.h"
#include "threadframe.h"
#include "wmv2dec.h"
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
{
ff_mpv_common_defaults(s);
s->avctx = avctx;
s->width = avctx->coded_width;
s->height = avctx->coded_height;
s->codec_id = avctx->codec->id;
s->workaround_bugs = avctx->workaround_bugs;
/* convert fourcc to upper case */
s->codec_tag = ff_toupper4(avctx->codec_tag);
ff_mpv_idct_init(s);
ff_h264chroma_init(&s->h264chroma, 8); //for lowres
}
int ff_mpeg_update_thread_context(AVCodecContext *dst,
const AVCodecContext *src)
{
MpegEncContext *const s1 = src->priv_data;
MpegEncContext *const s = dst->priv_data;
int ret;
if (dst == src)
return 0;
av_assert0(s != s1);
// FIXME can parameters change on I-frames?
// in that case dst may need a reinit
if (!s->context_initialized) {
void *private_ctx = s->private_ctx;
int err;
memcpy(s, s1, sizeof(*s));
s->context_initialized = 0;
s->context_reinit = 0;
s->avctx = dst;
s->private_ctx = private_ctx;
s->bitstream_buffer = NULL;
s->bitstream_buffer_size = s->allocated_bitstream_buffer_size = 0;
if (s1->context_initialized) {
if ((err = ff_mpv_common_init(s)) < 0)
return err;
}
}
if (s->height != s1->height || s->width != s1->width || s->context_reinit) {
s->height = s1->height;
s->width = s1->width;
if ((ret = ff_mpv_common_frame_size_change(s)) < 0)
return ret;
}
s->quarter_sample = s1->quarter_sample;
s->coded_picture_number = s1->coded_picture_number;
s->picture_number = s1->picture_number;
av_assert0(!s->picture || s->picture != s1->picture);
if (s->picture)
for (int i = 0; i < MAX_PICTURE_COUNT; i++) {
ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
if (s1->picture && s1->picture[i].f->buf[0] &&
(ret = ff_mpeg_ref_picture(s->avctx, &s->picture[i], &s1->picture[i])) < 0)
return ret;
}
#define UPDATE_PICTURE(pic)\
do {\
ff_mpeg_unref_picture(s->avctx, &s->pic);\
if (s1->pic.f && s1->pic.f->buf[0])\
ret = ff_mpeg_ref_picture(s->avctx, &s->pic, &s1->pic);\
else\
ret = ff_update_picture_tables(&s->pic, &s1->pic);\
if (ret < 0)\
return ret;\
} while (0)
UPDATE_PICTURE(current_picture);
UPDATE_PICTURE(last_picture);
UPDATE_PICTURE(next_picture);
#define REBASE_PICTURE(pic, new_ctx, old_ctx) \
((pic && pic >= old_ctx->picture && \
pic < old_ctx->picture + MAX_PICTURE_COUNT) ? \
&new_ctx->picture[pic - old_ctx->picture] : NULL)
s->last_picture_ptr = REBASE_PICTURE(s1->last_picture_ptr, s, s1);
s->current_picture_ptr = REBASE_PICTURE(s1->current_picture_ptr, s, s1);
s->next_picture_ptr = REBASE_PICTURE(s1->next_picture_ptr, s, s1);
// Error/bug resilience
s->workaround_bugs = s1->workaround_bugs;
s->padding_bug_score = s1->padding_bug_score;
// MPEG-4 timing info
memcpy(&s->last_time_base, &s1->last_time_base,
(char *) &s1->pb_field_time + sizeof(s1->pb_field_time) -
(char *) &s1->last_time_base);
// B-frame info
s->max_b_frames = s1->max_b_frames;
s->low_delay = s1->low_delay;
s->droppable = s1->droppable;
// DivX handling (doesn't work)
s->divx_packed = s1->divx_packed;
if (s1->bitstream_buffer) {
av_fast_padded_malloc(&s->bitstream_buffer,
&s->allocated_bitstream_buffer_size,
s1->bitstream_buffer_size);
if (!s->bitstream_buffer) {
s->bitstream_buffer_size = 0;
return AVERROR(ENOMEM);
}
s->bitstream_buffer_size = s1->bitstream_buffer_size;
memcpy(s->bitstream_buffer, s1->bitstream_buffer,
s1->bitstream_buffer_size);
}
// linesize-dependent scratch buffer allocation
if (!s->sc.edge_emu_buffer)
if (s1->linesize) {
if (ff_mpeg_framesize_alloc(s->avctx, &s->me,
&s->sc, s1->linesize) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Failed to allocate context "
"scratch buffers.\n");
return AVERROR(ENOMEM);
}
} else {
av_log(s->avctx, AV_LOG_ERROR, "Context scratch buffers could not "
"be allocated due to unknown size.\n");
}
// MPEG-2/interlacing info
memcpy(&s->progressive_sequence, &s1->progressive_sequence,
(char *) &s1->rtp_mode - (char *) &s1->progressive_sequence);
return 0;
}
int ff_mpv_common_frame_size_change(MpegEncContext *s)
{
int err = 0;
if (!s->context_initialized)
return AVERROR(EINVAL);
ff_mpv_free_context_frame(s);
if (s->picture)
for (int i = 0; i < MAX_PICTURE_COUNT; i++)
s->picture[i].needs_realloc = 1;
s->last_picture_ptr =
s->next_picture_ptr =
s->current_picture_ptr = NULL;
if ((s->width || s->height) &&
(err = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
goto fail;
/* set chroma shifts */
err = av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
&s->chroma_x_shift,
&s->chroma_y_shift);
if (err < 0)
goto fail;
if ((err = ff_mpv_init_context_frame(s)))
goto fail;
memset(s->thread_context, 0, sizeof(s->thread_context));
s->thread_context[0] = s;
if (s->width && s->height) {
err = ff_mpv_init_duplicate_contexts(s);
if (err < 0)
goto fail;
}
s->context_reinit = 0;
return 0;
fail:
ff_mpv_free_context_frame(s);
s->context_reinit = 1;
return err;
}
static int alloc_picture(MpegEncContext *s, Picture *pic)
{
return ff_alloc_picture(s->avctx, pic, &s->me, &s->sc, 0, 0,
s->chroma_x_shift, s->chroma_y_shift, s->out_format,
s->mb_stride, s->mb_width, s->mb_height, s->b8_stride,
&s->linesize, &s->uvlinesize);
}
static void color_frame(AVFrame *frame, int luma)
{
int h_chroma_shift, v_chroma_shift;
for (int i = 0; i < frame->height; i++)
memset(frame->data[0] + frame->linesize[0] * i, luma, frame->width);
if (!frame->data[1])
return;
av_pix_fmt_get_chroma_sub_sample(frame->format, &h_chroma_shift, &v_chroma_shift);
for (int i = 0; i < AV_CEIL_RSHIFT(frame->height, v_chroma_shift); i++) {
memset(frame->data[1] + frame->linesize[1] * i,
0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
memset(frame->data[2] + frame->linesize[2] * i,
0x80, AV_CEIL_RSHIFT(frame->width, h_chroma_shift));
}
}
/**
* generic function called after decoding
* the header and before a frame is decoded.
*/
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
{
Picture *pic;
int idx, ret;
s->mb_skipped = 0;
if (!ff_thread_can_start_frame(avctx)) {
av_log(avctx, AV_LOG_ERROR, "Attempt to start a frame outside SETUP state\n");
return -1;
}
/* mark & release old frames */
if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr &&
s->last_picture_ptr != s->next_picture_ptr &&
s->last_picture_ptr->f->buf[0]) {
ff_mpeg_unref_picture(s->avctx, s->last_picture_ptr);
}
/* release non reference/forgotten frames */
for (int i = 0; i < MAX_PICTURE_COUNT; i++) {
if (!s->picture[i].reference ||
(&s->picture[i] != s->last_picture_ptr &&
&s->picture[i] != s->next_picture_ptr &&
!s->picture[i].needs_realloc)) {
ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
}
}
ff_mpeg_unref_picture(s->avctx, &s->current_picture);
ff_mpeg_unref_picture(s->avctx, &s->last_picture);
ff_mpeg_unref_picture(s->avctx, &s->next_picture);
if (s->current_picture_ptr && !s->current_picture_ptr->f->buf[0]) {
// we already have an unused image
// (maybe it was set before reading the header)
pic = s->current_picture_ptr;
} else {
idx = ff_find_unused_picture(s->avctx, s->picture, 0);
if (idx < 0) {
av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
return idx;
}
pic = &s->picture[idx];
}
pic->reference = 0;
if (!s->droppable) {
if (s->pict_type != AV_PICTURE_TYPE_B)
pic->reference = 3;
}
#if FF_API_FRAME_PICTURE_NUMBER
FF_DISABLE_DEPRECATION_WARNINGS
pic->f->coded_picture_number = s->coded_picture_number++;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if (alloc_picture(s, pic) < 0)
return -1;
s->current_picture_ptr = pic;
// FIXME use only the vars from current_pic
s->current_picture_ptr->f->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST * !!s->top_field_first;
if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
if (s->picture_structure != PICT_FRAME)
s->current_picture_ptr->f->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST *
((s->picture_structure == PICT_TOP_FIELD) == s->first_field);
}
s->current_picture_ptr->f->flags |= AV_FRAME_FLAG_INTERLACED * (!s->progressive_frame &&
!s->progressive_sequence);
s->current_picture_ptr->field_picture = s->picture_structure != PICT_FRAME;
s->current_picture_ptr->f->pict_type = s->pict_type;
if (s->pict_type == AV_PICTURE_TYPE_I)
s->current_picture_ptr->f->flags |= AV_FRAME_FLAG_KEY;
else
s->current_picture_ptr->f->flags &= ~AV_FRAME_FLAG_KEY;
if ((ret = ff_mpeg_ref_picture(s->avctx, &s->current_picture,
s->current_picture_ptr)) < 0)
return ret;
if (s->pict_type != AV_PICTURE_TYPE_B) {
s->last_picture_ptr = s->next_picture_ptr;
if (!s->droppable)
s->next_picture_ptr = s->current_picture_ptr;
}
ff_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n",
s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr,
s->last_picture_ptr ? s->last_picture_ptr->f->data[0] : NULL,
s->next_picture_ptr ? s->next_picture_ptr->f->data[0] : NULL,
s->current_picture_ptr ? s->current_picture_ptr->f->data[0] : NULL,
s->pict_type, s->droppable);
if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) &&
(s->pict_type != AV_PICTURE_TYPE_I)) {
if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture_ptr && s->next_picture_ptr->f->buf[0])
av_log(avctx, AV_LOG_DEBUG,
"allocating dummy last picture for B frame\n");
else if (s->pict_type != AV_PICTURE_TYPE_I)
av_log(avctx, AV_LOG_ERROR,
"warning: first frame is no keyframe\n");
/* Allocate a dummy frame */
idx = ff_find_unused_picture(s->avctx, s->picture, 0);
if (idx < 0) {
av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
return idx;
}
s->last_picture_ptr = &s->picture[idx];
s->last_picture_ptr->reference = 3;
s->last_picture_ptr->f->flags &= ~AV_FRAME_FLAG_KEY;
s->last_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
if (alloc_picture(s, s->last_picture_ptr) < 0) {
s->last_picture_ptr = NULL;
return -1;
}
if (!avctx->hwaccel) {
int luma_val = s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263 ? 16 : 0x80;
color_frame(s->last_picture_ptr->f, luma_val);
}
ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0);
ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1);
}
if ((!s->next_picture_ptr || !s->next_picture_ptr->f->buf[0]) &&
s->pict_type == AV_PICTURE_TYPE_B) {
/* Allocate a dummy frame */
idx = ff_find_unused_picture(s->avctx, s->picture, 0);
if (idx < 0) {
av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n");
return idx;
}
s->next_picture_ptr = &s->picture[idx];
s->next_picture_ptr->reference = 3;
s->next_picture_ptr->f->flags &= ~AV_FRAME_FLAG_KEY;
s->next_picture_ptr->f->pict_type = AV_PICTURE_TYPE_P;
if (alloc_picture(s, s->next_picture_ptr) < 0) {
s->next_picture_ptr = NULL;
return -1;
}
ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0);
ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1);
}
if (s->last_picture_ptr) {
if (s->last_picture_ptr->f->buf[0] &&
(ret = ff_mpeg_ref_picture(s->avctx, &s->last_picture,
s->last_picture_ptr)) < 0)
return ret;
}
if (s->next_picture_ptr) {
if (s->next_picture_ptr->f->buf[0] &&
(ret = ff_mpeg_ref_picture(s->avctx, &s->next_picture,
s->next_picture_ptr)) < 0)
return ret;
}
av_assert0(s->pict_type == AV_PICTURE_TYPE_I || (s->last_picture_ptr &&
s->last_picture_ptr->f->buf[0]));
if (s->picture_structure != PICT_FRAME) {
for (int i = 0; i < 4; i++) {
if (s->picture_structure == PICT_BOTTOM_FIELD) {
s->current_picture.f->data[i] = FF_PTR_ADD(s->current_picture.f->data[i],
s->current_picture.f->linesize[i]);
}
s->current_picture.f->linesize[i] *= 2;
s->last_picture.f->linesize[i] *= 2;
s->next_picture.f->linesize[i] *= 2;
}
}
/* set dequantizer, we can't do it during init as
* it might change for MPEG-4 and we can't do it in the header
* decode as init is not called for MPEG-4 there yet */
if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra;
s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter;
} else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) {
s->dct_unquantize_intra = s->dct_unquantize_h263_intra;
s->dct_unquantize_inter = s->dct_unquantize_h263_inter;
} else {
s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra;
s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter;
}
if (s->avctx->debug & FF_DEBUG_NOMC)
color_frame(s->current_picture_ptr->f, 0x80);
return 0;
}
/* called after a frame has been decoded. */
void ff_mpv_frame_end(MpegEncContext *s)
{
emms_c();
if (s->current_picture.reference)
ff_thread_report_progress(&s->current_picture_ptr->tf, INT_MAX, 0);
}
void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict)
{
ff_print_debug_info2(s->avctx, pict, s->mbskip_table, p->mb_type,
p->qscale_table, p->motion_val,
s->mb_width, s->mb_height, s->mb_stride, s->quarter_sample);
}
int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, const Picture *p, int qp_type)
{
AVVideoEncParams *par;
int mult = (qp_type == FF_MPV_QSCALE_TYPE_MPEG1) ? 2 : 1;
unsigned int nb_mb = p->alloc_mb_height * p->alloc_mb_width;
if (!(s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_VIDEO_ENC_PARAMS))
return 0;
par = av_video_enc_params_create_side_data(f, AV_VIDEO_ENC_PARAMS_MPEG2, nb_mb);
if (!par)
return AVERROR(ENOMEM);
for (unsigned y = 0; y < p->alloc_mb_height; y++)
for (unsigned x = 0; x < p->alloc_mb_width; x++) {
const unsigned int block_idx = y * p->alloc_mb_width + x;
const unsigned int mb_xy = y * p->alloc_mb_stride + x;
AVVideoBlockParams *const b = av_video_enc_params_block(par, block_idx);
b->src_x = x * 16;
b->src_y = y * 16;
b->w = 16;
b->h = 16;
b->delta_qp = p->qscale_table[mb_xy] * mult;
}
return 0;
}
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
{
ff_draw_horiz_band(s->avctx, s->current_picture_ptr->f,
s->last_picture_ptr ? s->last_picture_ptr->f : NULL,
y, h, s->picture_structure,
s->first_field, s->low_delay);
}
void ff_mpeg_flush(AVCodecContext *avctx)
{
MpegEncContext *const s = avctx->priv_data;
if (!s->picture)
return;
for (int i = 0; i < MAX_PICTURE_COUNT; i++)
ff_mpeg_unref_picture(s->avctx, &s->picture[i]);
s->current_picture_ptr = s->last_picture_ptr = s->next_picture_ptr = NULL;
ff_mpeg_unref_picture(s->avctx, &s->current_picture);
ff_mpeg_unref_picture(s->avctx, &s->last_picture);
ff_mpeg_unref_picture(s->avctx, &s->next_picture);
s->mb_x = s->mb_y = 0;
s->bitstream_buffer_size = 0;
s->pp_time = 0;
}
void ff_mpv_report_decode_progress(MpegEncContext *s)
{
if (s->pict_type != AV_PICTURE_TYPE_B && !s->partitioned_frame && !s->er.error_occurred)
ff_thread_report_progress(&s->current_picture_ptr->tf, s->mb_y, 0);
}
static inline int hpel_motion_lowres(MpegEncContext *s,
uint8_t *dest, const uint8_t *src,
int field_based, int field_select,
int src_x, int src_y,
int width, int height, ptrdiff_t stride,
int h_edge_pos, int v_edge_pos,
int w, int h, const h264_chroma_mc_func *pix_op,
int motion_x, int motion_y)
{
const int lowres = s->avctx->lowres;
const int op_index = FFMIN(lowres, 3);
const int s_mask = (2 << lowres) - 1;
int emu = 0;
int sx, sy;
if (s->quarter_sample) {
motion_x /= 2;
motion_y /= 2;
}
sx = motion_x & s_mask;
sy = motion_y & s_mask;
src_x += motion_x >> lowres + 1;
src_y += motion_y >> lowres + 1;
src += src_y * stride + src_x;
if ((unsigned)src_x > FFMAX( h_edge_pos - (!!sx) - w, 0) ||
(unsigned)src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - h, 0)) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src,
s->linesize, s->linesize,
w + 1, (h + 1) << field_based,
src_x, src_y * (1 << field_based),
h_edge_pos, v_edge_pos);
src = s->sc.edge_emu_buffer;
emu = 1;
}
sx = (sx << 2) >> lowres;
sy = (sy << 2) >> lowres;
if (field_select)
src += s->linesize;
pix_op[op_index](dest, src, stride, h, sx, sy);
return emu;
}
/* apply one mpeg motion vector to the three components */
static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
uint8_t *dest_y,
uint8_t *dest_cb,
uint8_t *dest_cr,
int field_based,
int bottom_field,
int field_select,
uint8_t *const *ref_picture,
const h264_chroma_mc_func *pix_op,
int motion_x, int motion_y,
int h, int mb_y)
{
const uint8_t *ptr_y, *ptr_cb, *ptr_cr;
int mx, my, src_x, src_y, uvsrc_x, uvsrc_y, sx, sy, uvsx, uvsy;
ptrdiff_t uvlinesize, linesize;
const int lowres = s->avctx->lowres;
const int op_index = FFMIN(lowres - 1 + s->chroma_x_shift, 3);
const int block_s = 8 >> lowres;
const int s_mask = (2 << lowres) - 1;
const int h_edge_pos = s->h_edge_pos >> lowres;
const int v_edge_pos = s->v_edge_pos >> lowres;
int hc = s->chroma_y_shift ? (h+1-bottom_field)>>1 : h;
linesize = s->current_picture.f->linesize[0] << field_based;
uvlinesize = s->current_picture.f->linesize[1] << field_based;
// FIXME obviously not perfect but qpel will not work in lowres anyway
if (s->quarter_sample) {
motion_x /= 2;
motion_y /= 2;
}
if (field_based) {
motion_y += (bottom_field - field_select)*((1 << lowres)-1);
}
sx = motion_x & s_mask;
sy = motion_y & s_mask;
src_x = s->mb_x * 2 * block_s + (motion_x >> lowres + 1);
src_y = (mb_y * 2 * block_s >> field_based) + (motion_y >> lowres + 1);
if (s->out_format == FMT_H263) {
uvsx = ((motion_x >> 1) & s_mask) | (sx & 1);
uvsy = ((motion_y >> 1) & s_mask) | (sy & 1);
uvsrc_x = src_x >> 1;
uvsrc_y = src_y >> 1;
} else if (s->out_format == FMT_H261) {
// even chroma mv's are full pel in H261
mx = motion_x / 4;
my = motion_y / 4;
uvsx = (2 * mx) & s_mask;
uvsy = (2 * my) & s_mask;
uvsrc_x = s->mb_x * block_s + (mx >> lowres);
uvsrc_y = mb_y * block_s + (my >> lowres);
} else {
if (s->chroma_y_shift) {
mx = motion_x / 2;
my = motion_y / 2;
uvsx = mx & s_mask;
uvsy = my & s_mask;
uvsrc_x = s->mb_x * block_s + (mx >> lowres + 1);
uvsrc_y = (mb_y * block_s >> field_based) + (my >> lowres + 1);
} else {
if (s->chroma_x_shift) {
//Chroma422
mx = motion_x / 2;
uvsx = mx & s_mask;
uvsy = motion_y & s_mask;
uvsrc_y = src_y;
uvsrc_x = s->mb_x*block_s + (mx >> (lowres+1));
} else {
//Chroma444
uvsx = motion_x & s_mask;
uvsy = motion_y & s_mask;
uvsrc_x = src_x;
uvsrc_y = src_y;
}
}
}
ptr_y = ref_picture[0] + src_y * linesize + src_x;
ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
if ((unsigned) src_x > FFMAX( h_edge_pos - (!!sx) - 2 * block_s, 0) || uvsrc_y<0 ||
(unsigned) src_y > FFMAX((v_edge_pos >> field_based) - (!!sy) - FFMAX(h, hc<<s->chroma_y_shift), 0)) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
linesize >> field_based, linesize >> field_based,
17, 17 + field_based,
src_x, src_y * (1 << field_based), h_edge_pos,
v_edge_pos);
ptr_y = s->sc.edge_emu_buffer;
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
uint8_t *ubuf = s->sc.edge_emu_buffer + 18 * s->linesize;
uint8_t *vbuf =ubuf + 10 * s->uvlinesize;
if (s->workaround_bugs & FF_BUG_IEDGE)
vbuf -= s->uvlinesize;
s->vdsp.emulated_edge_mc(ubuf, ptr_cb,
uvlinesize >> field_based, uvlinesize >> field_based,
9, 9 + field_based,
uvsrc_x, uvsrc_y * (1 << field_based),
h_edge_pos >> 1, v_edge_pos >> 1);
s->vdsp.emulated_edge_mc(vbuf, ptr_cr,
uvlinesize >> field_based,uvlinesize >> field_based,
9, 9 + field_based,
uvsrc_x, uvsrc_y * (1 << field_based),
h_edge_pos >> 1, v_edge_pos >> 1);
ptr_cb = ubuf;
ptr_cr = vbuf;
}
}
// FIXME use this for field pix too instead of the obnoxious hack which changes picture.f->data
if (bottom_field) {
dest_y += s->linesize;
dest_cb += s->uvlinesize;
dest_cr += s->uvlinesize;
}
if (field_select) {
ptr_y += s->linesize;
ptr_cb += s->uvlinesize;
ptr_cr += s->uvlinesize;
}
sx = (sx << 2) >> lowres;
sy = (sy << 2) >> lowres;
pix_op[lowres - 1](dest_y, ptr_y, linesize, h, sx, sy);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
uvsx = (uvsx << 2) >> lowres;
uvsy = (uvsy << 2) >> lowres;
if (hc) {
pix_op[op_index](dest_cb, ptr_cb, uvlinesize, hc, uvsx, uvsy);
pix_op[op_index](dest_cr, ptr_cr, uvlinesize, hc, uvsx, uvsy);
}
}
// FIXME h261 lowres loop filter
}
static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
uint8_t *dest_cb, uint8_t *dest_cr,
uint8_t *const *ref_picture,
const h264_chroma_mc_func * pix_op,
int mx, int my)
{
const int lowres = s->avctx->lowres;
const int op_index = FFMIN(lowres, 3);
const int block_s = 8 >> lowres;
const int s_mask = (2 << lowres) - 1;
const int h_edge_pos = s->h_edge_pos >> lowres + 1;
const int v_edge_pos = s->v_edge_pos >> lowres + 1;
int emu = 0, src_x, src_y, sx, sy;
ptrdiff_t offset;
const uint8_t *ptr;
if (s->quarter_sample) {
mx /= 2;
my /= 2;
}
/* In case of 8X8, we construct a single chroma motion vector
with a special rounding */
mx = ff_h263_round_chroma(mx);
my = ff_h263_round_chroma(my);
sx = mx & s_mask;
sy = my & s_mask;
src_x = s->mb_x * block_s + (mx >> lowres + 1);
src_y = s->mb_y * block_s + (my >> lowres + 1);
offset = src_y * s->uvlinesize + src_x;
ptr = ref_picture[1] + offset;
if ((unsigned) src_x > FFMAX(h_edge_pos - (!!sx) - block_s, 0) ||
(unsigned) src_y > FFMAX(v_edge_pos - (!!sy) - block_s, 0)) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
s->uvlinesize, s->uvlinesize,
9, 9,
src_x, src_y, h_edge_pos, v_edge_pos);
ptr = s->sc.edge_emu_buffer;
emu = 1;
}
sx = (sx << 2) >> lowres;
sy = (sy << 2) >> lowres;
pix_op[op_index](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);
ptr = ref_picture[2] + offset;
if (emu) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
s->uvlinesize, s->uvlinesize,
9, 9,
src_x, src_y, h_edge_pos, v_edge_pos);
ptr = s->sc.edge_emu_buffer;
}
pix_op[op_index](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
}
/**
* motion compensation of a single macroblock
* @param s context
* @param dest_y luma destination pointer
* @param dest_cb chroma cb/u destination pointer
* @param dest_cr chroma cr/v destination pointer
* @param dir direction (0->forward, 1->backward)
* @param ref_picture array[3] of pointers to the 3 planes of the reference picture
* @param pix_op halfpel motion compensation function (average or put normally)
* the motion vectors are taken from s->mv and the MV type from s->mv_type
*/
static inline void MPV_motion_lowres(MpegEncContext *s,
uint8_t *dest_y, uint8_t *dest_cb,
uint8_t *dest_cr,
int dir, uint8_t *const *ref_picture,
const h264_chroma_mc_func *pix_op)
{
int mx, my;
int mb_x, mb_y;
const int lowres = s->avctx->lowres;
const int block_s = 8 >>lowres;
mb_x = s->mb_x;
mb_y = s->mb_y;
switch (s->mv_type) {
case MV_TYPE_16X16:
mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
0, 0, 0,
ref_picture, pix_op,
s->mv[dir][0][0], s->mv[dir][0][1],
2 * block_s, mb_y);
break;
case MV_TYPE_8X8:
mx = 0;
my = 0;
for (int i = 0; i < 4; i++) {
hpel_motion_lowres(s, dest_y + ((i & 1) + (i >> 1) *
s->linesize) * block_s,
ref_picture[0], 0, 0,
(2 * mb_x + (i & 1)) * block_s,
(2 * mb_y + (i >> 1)) * block_s,
s->width, s->height, s->linesize,
s->h_edge_pos >> lowres, s->v_edge_pos >> lowres,
block_s, block_s, pix_op,
s->mv[dir][i][0], s->mv[dir][i][1]);
mx += s->mv[dir][i][0];
my += s->mv[dir][i][1];
}
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY))
chroma_4mv_motion_lowres(s, dest_cb, dest_cr, ref_picture,
pix_op, mx, my);
break;
case MV_TYPE_FIELD:
if (s->picture_structure == PICT_FRAME) {
/* top field */
mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1, 0, s->field_select[dir][0],
ref_picture, pix_op,
s->mv[dir][0][0], s->mv[dir][0][1],
block_s, mb_y);
/* bottom field */
mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1, 1, s->field_select[dir][1],
ref_picture, pix_op,
s->mv[dir][1][0], s->mv[dir][1][1],
block_s, mb_y);
} else {
if ( s->picture_structure != s->field_select[dir][0] + 1 && s->pict_type != AV_PICTURE_TYPE_B && !s->first_field
|| !ref_picture[0]) {
ref_picture = s->current_picture_ptr->f->data;
}
mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
0, 0, s->field_select[dir][0],
ref_picture, pix_op,
s->mv[dir][0][0],
s->mv[dir][0][1], 2 * block_s, mb_y >> 1);
}
break;
case MV_TYPE_16X8:
for (int i = 0; i < 2; i++) {
uint8_t *const *ref2picture;
if ((s->picture_structure == s->field_select[dir][i] + 1 ||
s->pict_type == AV_PICTURE_TYPE_B || s->first_field) &&
ref_picture[0]) {
ref2picture = ref_picture;
} else {
ref2picture = s->current_picture_ptr->f->data;
}
mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
0, 0, s->field_select[dir][i],
ref2picture, pix_op,
s->mv[dir][i][0], s->mv[dir][i][1] +
2 * block_s * i, block_s, mb_y >> 1);
dest_y += 2 * block_s * s->linesize;
dest_cb += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
dest_cr += (2 * block_s >> s->chroma_y_shift) * s->uvlinesize;
}
break;
case MV_TYPE_DMV:
if (s->picture_structure == PICT_FRAME) {
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
1, j, j ^ i,
ref_picture, pix_op,
s->mv[dir][2 * i + j][0],
s->mv[dir][2 * i + j][1],
block_s, mb_y);
}
pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
}
} else {
if (!ref_picture[0]) {
ref_picture = s->current_picture_ptr->f->data;
}
for (int i = 0; i < 2; i++) {
mpeg_motion_lowres(s, dest_y, dest_cb, dest_cr,
0, 0, s->picture_structure != i + 1,
ref_picture, pix_op,
s->mv[dir][2 * i][0],s->mv[dir][2 * i][1],
2 * block_s, mb_y >> 1);
// after put we make avg of the same block
pix_op = s->h264chroma.avg_h264_chroma_pixels_tab;
// opposite parity is always in the same
// frame if this is second field
if (!s->first_field) {
ref_picture = s->current_picture_ptr->f->data;
}
}
}
break;
default:
av_assert2(0);
}
}
/**
* find the lowest MB row referenced in the MVs
*/
static int lowest_referenced_row(MpegEncContext *s, int dir)
{
int my_max = INT_MIN, my_min = INT_MAX, qpel_shift = !s->quarter_sample;
int off, mvs;
if (s->picture_structure != PICT_FRAME || s->mcsel)
goto unhandled;
switch (s->mv_type) {
case MV_TYPE_16X16:
mvs = 1;
break;
case MV_TYPE_16X8:
mvs = 2;
break;
case MV_TYPE_8X8:
mvs = 4;
break;
default:
goto unhandled;
}
for (int i = 0; i < mvs; i++) {
int my = s->mv[dir][i][1];
my_max = FFMAX(my_max, my);
my_min = FFMIN(my_min, my);
}
off = ((FFMAX(-my_min, my_max) << qpel_shift) + 63) >> 6;
return av_clip(s->mb_y + off, 0, s->mb_height - 1);
unhandled:
return s->mb_height - 1;
}
/* add block[] to dest[] */
static inline void add_dct(MpegEncContext *s,
int16_t *block, int i, uint8_t *dest, int line_size)
{
if (s->block_last_index[i] >= 0) {
s->idsp.idct_add(dest, line_size, block);
}
}
#define IS_ENCODER 0
#include "mpv_reconstruct_mb_template.c"
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
{
if (s->avctx->debug & FF_DEBUG_DCT_COEFF) {
/* print DCT coefficients */
av_log(s->avctx, AV_LOG_DEBUG, "DCT coeffs of MB at %dx%d:\n", s->mb_x, s->mb_y);
for (int i = 0; i < 6; i++) {
for (int j = 0; j < 64; j++) {
av_log(s->avctx, AV_LOG_DEBUG, "%5d",
block[i][s->idsp.idct_permutation[j]]);
}
av_log(s->avctx, AV_LOG_DEBUG, "\n");
}
}
if (!s->avctx->lowres) {
#if !CONFIG_SMALL
if (s->out_format == FMT_MPEG1)
mpv_reconstruct_mb_internal(s, block, 0, DEFINITELY_MPEG12);
else
mpv_reconstruct_mb_internal(s, block, 0, NOT_MPEG12);
#else
mpv_reconstruct_mb_internal(s, block, 0, MAY_BE_MPEG12);
#endif
} else
mpv_reconstruct_mb_internal(s, block, 1, MAY_BE_MPEG12);
}
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