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/*
* 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"
#include "version.h"
/**
* Return value for header parsers if frame is not coded.
* */
#define FRAME_SKIPPED 100
/* picture type */
#define PICT_TOP_FIELD 1
#define PICT_BOTTOM_FIELD 2
#define PICT_FRAME 3
/**
* Value of Picture.reference when Picture is not a reference picture, but
* is held for delayed output.
*/
#define DELAYED_PIC_REF 4
#define MAX_MB_BYTES (30 * 16 * 16 * 3 / 8 + 120)
#define MAX_FCODE 7
/* MB types */
#if !FF_API_MB_TYPE
#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_ACPRED (1 << 9)
#define MB_TYPE_GMC (1 << 10)
#define MB_TYPE_SKIP (1 << 11)
#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_QUANT (1 << 16)
#define MB_TYPE_CBP (1 << 17)
#endif
#define MB_TYPE_INTRA MB_TYPE_INTRA4x4 // default mb_type if there is just one type
#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_SUB_8X8(a) ((a) & MB_TYPE_16x16) // note reused
#define IS_SUB_8X4(a) ((a) & MB_TYPE_16x8) // note reused
#define IS_SUB_4X8(a) ((a) & MB_TYPE_8x16) // note reused
#define IS_SUB_4X4(a) ((a) & MB_TYPE_8x8) // note reused
#define IS_ACPRED(a) ((a) & MB_TYPE_ACPRED)
#define IS_QUANT(a) ((a) & MB_TYPE_QUANT)
#define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0 << ((part) + 2 * (list))))
// does this mb use listX, note does not work if subMBs
#define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0 | MB_TYPE_P1L0) << (2 * (list))))
#define HAS_CBP(a) ((a) & MB_TYPE_CBP)
/* MB types for encoding */
#define CANDIDATE_MB_TYPE_INTRA (1 << 0)
#define CANDIDATE_MB_TYPE_INTER (1 << 1)
#define CANDIDATE_MB_TYPE_INTER4V (1 << 2)
#define CANDIDATE_MB_TYPE_SKIPPED (1 << 3)
#define CANDIDATE_MB_TYPE_DIRECT (1 << 4)
#define CANDIDATE_MB_TYPE_FORWARD (1 << 5)
#define CANDIDATE_MB_TYPE_BACKWARD (1 << 6)
#define CANDIDATE_MB_TYPE_BIDIR (1 << 7)
#define CANDIDATE_MB_TYPE_INTER_I (1 << 8)
#define CANDIDATE_MB_TYPE_FORWARD_I (1 << 9)
#define CANDIDATE_MB_TYPE_BACKWARD_I (1 << 10)
#define CANDIDATE_MB_TYPE_BIDIR_I (1 << 11)
#define CANDIDATE_MB_TYPE_DIRECT0 (1 << 12)
#define INPLACE_OFFSET 16
enum OutputFormat {
FMT_MPEG1,
FMT_H261,
FMT_H263,
FMT_MJPEG,
};
/**
* 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, AVFrame *cur, AVFrame *last,
int y, int h, int picture_structure, int first_field,
int low_delay);
#endif /* AVCODEC_MPEGUTILS_H */
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