mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-09-19 21:06:42 +00:00
952a32e9a0
The earlier code had two problems: 1. For reference frames that are not directly output (happens unless low_delay is set), the mb skip values referred to the next reference frame to be decoded. 2. For non-reference frames, every macroblock was always considered skipped. This makes the output (worse than) useless; that no one ever complained about this shows that this feature is not really used. It is therefore removed. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
114 lines
4.3 KiB
C
114 lines
4.3 KiB
C
/*
|
|
* Mpeg video formats-related defines and utility functions
|
|
*
|
|
* 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_MPEGUTILS_H
|
|
#define AVCODEC_MPEGUTILS_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/frame.h"
|
|
|
|
#include "avcodec.h"
|
|
|
|
/* picture type */
|
|
#define PICT_TOP_FIELD 1
|
|
#define PICT_BOTTOM_FIELD 2
|
|
#define PICT_FRAME 3
|
|
|
|
#define MAX_MB_BYTES (30 * 16 * 16 * 3 / 8 + 120)
|
|
#define MAX_FCODE 7
|
|
|
|
/* MB types */
|
|
#define MB_TYPE_INTRA4x4 (1 << 0)
|
|
#define MB_TYPE_INTRA16x16 (1 << 1) // FIXME H.264-specific
|
|
#define MB_TYPE_INTRA_PCM (1 << 2) // FIXME H.264-specific
|
|
#define MB_TYPE_16x16 (1 << 3)
|
|
#define MB_TYPE_16x8 (1 << 4)
|
|
#define MB_TYPE_8x16 (1 << 5)
|
|
#define MB_TYPE_8x8 (1 << 6)
|
|
#define MB_TYPE_INTERLACED (1 << 7)
|
|
#define MB_TYPE_DIRECT2 (1 << 8) // FIXME
|
|
#define MB_TYPE_CBP (1 << 10)
|
|
#define MB_TYPE_QUANT (1 << 11)
|
|
#define MB_TYPE_FORWARD_MV (1 << 12)
|
|
#define MB_TYPE_BACKWARD_MV (1 << 13)
|
|
#define MB_TYPE_BIDIR_MV (MB_TYPE_FORWARD_MV | MB_TYPE_BACKWARD_MV)
|
|
// MB_TYPE_P[01]L[01], MB_TYPE_L[01] and MB_TYPE_L0L1 are H.264 only.
|
|
#define MB_TYPE_P0L0 (1 << 12)
|
|
#define MB_TYPE_P1L0 (1 << 13)
|
|
#define MB_TYPE_P0L1 (1 << 14)
|
|
#define MB_TYPE_P1L1 (1 << 15)
|
|
#define MB_TYPE_L0 (MB_TYPE_P0L0 | MB_TYPE_P1L0)
|
|
#define MB_TYPE_L1 (MB_TYPE_P0L1 | MB_TYPE_P1L1)
|
|
#define MB_TYPE_L0L1 (MB_TYPE_L0 | MB_TYPE_L1)
|
|
#define MB_TYPE_GMC (1 << 16)
|
|
#define MB_TYPE_SKIP (1 << 17)
|
|
#define MB_TYPE_ACPRED (1 << 18)
|
|
|
|
#define MB_TYPE_INTRA MB_TYPE_INTRA4x4 // default mb_type if there is just one type
|
|
|
|
// The following MB-type can be used by each codec as it sees fit.
|
|
#define MB_TYPE_CODEC_SPECIFIC (1 << 9)
|
|
|
|
#define IS_INTRA4x4(a) ((a) & MB_TYPE_INTRA4x4)
|
|
#define IS_INTRA16x16(a) ((a) & MB_TYPE_INTRA16x16)
|
|
#define IS_PCM(a) ((a) & MB_TYPE_INTRA_PCM)
|
|
#define IS_INTRA(a) ((a) & 7)
|
|
#define IS_INTER(a) ((a) & (MB_TYPE_16x16 | MB_TYPE_16x8 | \
|
|
MB_TYPE_8x16 | MB_TYPE_8x8))
|
|
#define IS_SKIP(a) ((a) & MB_TYPE_SKIP)
|
|
#define IS_INTRA_PCM(a) ((a) & MB_TYPE_INTRA_PCM)
|
|
#define IS_INTERLACED(a) ((a) & MB_TYPE_INTERLACED)
|
|
#define IS_DIRECT(a) ((a) & MB_TYPE_DIRECT2)
|
|
#define IS_GMC(a) ((a) & MB_TYPE_GMC)
|
|
#define IS_16X16(a) ((a) & MB_TYPE_16x16)
|
|
#define IS_16X8(a) ((a) & MB_TYPE_16x8)
|
|
#define IS_8X16(a) ((a) & MB_TYPE_8x16)
|
|
#define IS_8X8(a) ((a) & MB_TYPE_8x8)
|
|
#define IS_ACPRED(a) ((a) & MB_TYPE_ACPRED)
|
|
#define IS_QUANT(a) ((a) & MB_TYPE_QUANT)
|
|
|
|
#define HAS_CBP(a) ((a) & MB_TYPE_CBP)
|
|
#define HAS_FORWARD_MV(a) ((a) & MB_TYPE_FORWARD_MV)
|
|
#define HAS_BACKWARD_MV(a) ((a) & MB_TYPE_BACKWARD_MV)
|
|
// dir == 0 means forward, dir == 1 is backward
|
|
#define HAS_MV(a, dir) ((a) & (MB_TYPE_FORWARD_MV << (dir)))
|
|
|
|
#define MB_TYPE_MV_2_MV_DIR(a) (((a) >> 12) & (MV_DIR_FORWARD | MV_DIR_BACKWARD))
|
|
|
|
/**
|
|
* Draw a horizontal band if supported.
|
|
*
|
|
* @param h is the normal height, this will be reduced automatically if needed
|
|
*/
|
|
void ff_draw_horiz_band(AVCodecContext *avctx, const AVFrame *cur, const AVFrame *last,
|
|
int y, int h, int picture_structure, int first_field,
|
|
int low_delay);
|
|
|
|
/**
|
|
* Print debugging info for the given picture.
|
|
*/
|
|
void ff_print_debug_info2(AVCodecContext *avctx, AVFrame *pict,
|
|
const uint32_t *mbtype_table,
|
|
const int8_t *qscale_table, int16_t (*const motion_val[2])[2],
|
|
int mb_width, int mb_height, int mb_stride, int quarter_sample);
|
|
|
|
#endif /* AVCODEC_MPEGUTILS_H */
|