mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-31 20:42:49 +08:00
500bbd584d
This avoids including mpegvideo.h in mpeg4_unpack_bframes_bsf.c. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*
|
|
* MPEG-4 encoder/decoder internal header.
|
|
* Copyright (c) 2000,2001 Fabrice Bellard
|
|
* Copyright (c) 2002-2010 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
|
|
*/
|
|
|
|
#ifndef AVCODEC_MPEG4VIDEO_H
|
|
#define AVCODEC_MPEG4VIDEO_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "mpegvideo.h"
|
|
|
|
void ff_mpeg4_clean_buffers(MpegEncContext *s);
|
|
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
|
|
void ff_mpeg4_init_direct_mv(MpegEncContext *s);
|
|
|
|
/**
|
|
* @return the mb_type
|
|
*/
|
|
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
|
|
|
|
#if 0 //3IV1 is quite rare and it slows things down a tiny bit
|
|
#define IS_3IV1 s->codec_tag == AV_RL32("3IV1")
|
|
#else
|
|
#define IS_3IV1 0
|
|
#endif
|
|
|
|
/**
|
|
* Predict the dc.
|
|
* encoding quantized level -> quantized diff
|
|
* decoding quantized diff -> quantized level
|
|
* @param n block index (0-3 are luma, 4-5 are chroma)
|
|
* @param dir_ptr pointer to an integer where the prediction direction will be stored
|
|
*/
|
|
static inline int ff_mpeg4_pred_dc(MpegEncContext *s, int n, int level,
|
|
int *dir_ptr, int encoding)
|
|
{
|
|
int a, b, c, wrap, pred, scale, ret;
|
|
int16_t *dc_val;
|
|
|
|
/* find prediction */
|
|
if (n < 4)
|
|
scale = s->y_dc_scale;
|
|
else
|
|
scale = s->c_dc_scale;
|
|
if (IS_3IV1)
|
|
scale = 8;
|
|
|
|
wrap = s->block_wrap[n];
|
|
dc_val = s->dc_val[0] + s->block_index[n];
|
|
|
|
/* B C
|
|
* A X
|
|
*/
|
|
a = dc_val[-1];
|
|
b = dc_val[-1 - wrap];
|
|
c = dc_val[-wrap];
|
|
|
|
/* outside slice handling (we can't do that by memset as we need the
|
|
* dc for error resilience) */
|
|
if (s->first_slice_line && n != 3) {
|
|
if (n != 2)
|
|
b = c = 1024;
|
|
if (n != 1 && s->mb_x == s->resync_mb_x)
|
|
b = a = 1024;
|
|
}
|
|
if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1) {
|
|
if (n == 0 || n == 4 || n == 5)
|
|
b = 1024;
|
|
}
|
|
|
|
if (abs(a - b) < abs(b - c)) {
|
|
pred = c;
|
|
*dir_ptr = 1; /* top */
|
|
} else {
|
|
pred = a;
|
|
*dir_ptr = 0; /* left */
|
|
}
|
|
/* we assume pred is positive */
|
|
pred = FASTDIV((pred + (scale >> 1)), scale);
|
|
|
|
if (encoding) {
|
|
ret = level - pred;
|
|
} else {
|
|
level += pred;
|
|
ret = level;
|
|
}
|
|
level *= scale;
|
|
if (level & (~2047)) {
|
|
if (!s->encoding && (s->avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE))) {
|
|
if (level < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"dc<0 at %dx%d\n", s->mb_x, s->mb_y);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (level > 2048 + scale) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"dc overflow at %dx%d\n", s->mb_x, s->mb_y);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
if (level < 0)
|
|
level = 0;
|
|
else if (!(s->workaround_bugs & FF_BUG_DC_CLIP))
|
|
level = 2047;
|
|
}
|
|
dc_val[0] = level;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* AVCODEC_MPEG4VIDEO_H */
|