mpeg12dec.c File Reference

#include <inttypes.h>
#include "libavutil/attributes.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/stereo3d.h"
#include "avcodec.h"
#include "bytestream.h"
#include "error_resilience.h"
#include "hwaccel.h"
#include "idctdsp.h"
#include "internal.h"
#include "mpeg_er.h"
#include "mpeg12.h"
#include "mpeg12data.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
#include "profiles.h"
#include "thread.h"
#include "version.h"
#include "xvmc_internal.h"

Go to the source code of this file.

Data Structures
struct	Mpeg1Context

Macros
#define	UNCHECKED_BITSTREAM_READER   1
#define	MB_TYPE_ZERO_MV   0x20000000
#define	MAX_INDEX   (64 - 1)
#define	check_scantable_index(ctx, x)
#define	MT_FIELD   1
#define	MT_FRAME   2
#define	MT_16X8   2
#define	MT_DMV   3
#define	DECODE_SLICE_ERROR   -1
#define	DECODE_SLICE_OK   0

Functions
static int	mpeg_decode_motion (MpegEncContext *s, int fcode, int pred)
static int	mpeg1_decode_block_inter (MpegEncContext *s, int16_t *block, int n)
static int	mpeg1_fast_decode_block_inter (MpegEncContext *s, int16_t *block, int n)
	Changing this would eat up any speed benefits it has. More...
static int	mpeg2_decode_block_non_intra (MpegEncContext *s, int16_t *block, int n)
static int	mpeg2_fast_decode_block_non_intra (MpegEncContext *s, int16_t *block, int n)
	Changing this would eat up any speed benefits it has. More...
static int	mpeg2_decode_block_intra (MpegEncContext *s, int16_t *block, int n)
static int	mpeg2_fast_decode_block_intra (MpegEncContext *s, int16_t *block, int n)
	Changing this would eat up any speed benefits it has. More...
static int	get_dmv (MpegEncContext *s)
static int	mpeg_decode_mb (MpegEncContext *s, int16_t block[12][64])
static av_cold int	mpeg_decode_init (AVCodecContext *avctx)
static void	quant_matrix_rebuild (uint16_t *matrix, const uint8_t *old_perm, const uint8_t *new_perm)
static enum AVPixelFormat	mpeg_get_pixelformat (AVCodecContext *avctx)
static void	setup_hwaccel_for_pixfmt (AVCodecContext *avctx)
static int	mpeg_decode_postinit (AVCodecContext *avctx)
static int	mpeg1_decode_picture (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static void	mpeg_decode_sequence_extension (Mpeg1Context *s1)
static void	mpeg_decode_sequence_display_extension (Mpeg1Context *s1)
static void	mpeg_decode_picture_display_extension (Mpeg1Context *s1)
static int	load_matrix (MpegEncContext *s, uint16_t matrix0[64], uint16_t matrix1[64], int intra)
static void	mpeg_decode_quant_matrix_extension (MpegEncContext *s)
static void	mpeg_decode_picture_coding_extension (Mpeg1Context *s1)
static int	mpeg_field_start (MpegEncContext *s, const uint8_t *buf, int buf_size)
static int	mpeg_decode_slice (MpegEncContext *s, int mb_y, const uint8_t **buf, int buf_size)
	Decode a slice. More...
static int	slice_decode_thread (AVCodecContext *c, void *arg)
static int	slice_end (AVCodecContext *avctx, AVFrame *pict)
	Handle slice ends. More...
static int	mpeg1_decode_sequence (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	vcr2_init_sequence (AVCodecContext *avctx)
static int	mpeg_decode_a53_cc (AVCodecContext *avctx, const uint8_t *p, int buf_size)
static void	mpeg_decode_user_data (AVCodecContext *avctx, const uint8_t *p, int buf_size)
static void	mpeg_decode_gop (AVCodecContext *avctx, const uint8_t *buf, int buf_size)
static int	decode_chunks (AVCodecContext *avctx, AVFrame *picture, int *got_output, const uint8_t *buf, int buf_size)
static int	mpeg_decode_frame (AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
static void	flush (AVCodecContext *avctx)
static av_cold int	mpeg_decode_end (AVCodecContext *avctx)

Variables
static const uint32_t	ptype2mb_type [7]
static const uint32_t	btype2mb_type [11]
static enum AVPixelFormat	mpeg1_hwaccel_pixfmt_list_420 []
static enum AVPixelFormat	mpeg2_hwaccel_pixfmt_list_420 []
static enum AVPixelFormat	mpeg12_pixfmt_list_422 []
static enum AVPixelFormat	mpeg12_pixfmt_list_444 []
AVCodec	ff_mpeg1video_decoder
AVCodec	ff_mpeg2video_decoder
AVCodec	ff_mpegvideo_decoder

Detailed Description

MPEG-1/2 decoder

Definition in file mpeg12dec.c.

Macro Definition Documentation

UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER   1

Definition at line 28 of file mpeg12dec.c.

MB_TYPE_ZERO_MV

#define MB_TYPE_ZERO_MV   0x20000000

Definition at line 74 of file mpeg12dec.c.

MAX_INDEX

#define MAX_INDEX   (64 - 1)

Definition at line 127 of file mpeg12dec.c.

check_scantable_index

#define check_scantable_index	(		ctx,
			x
	)

Value:

    do {                                                                      \
        if ((x) > MAX_INDEX) {                                                \
            av_log(ctx->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",     \
                   ctx->mb_x, ctx->mb_y);                                     \
            return AVERROR_INVALIDDATA;                                       \
        }                                                                     \
    } while (0)

Definition at line 128 of file mpeg12dec.c.

MT_FIELD

#define MT_FIELD   1

Definition at line 650 of file mpeg12dec.c.

MT_FRAME

#define MT_FRAME   2

Definition at line 651 of file mpeg12dec.c.

MT_16X8

#define MT_16X8   2

Definition at line 652 of file mpeg12dec.c.

MT_DMV

#define MT_DMV   3

Definition at line 653 of file mpeg12dec.c.

DECODE_SLICE_ERROR

#define DECODE_SLICE_ERROR   -1

Definition at line 1689 of file mpeg12dec.c.

DECODE_SLICE_OK

#define DECODE_SLICE_OK   0

Definition at line 1690 of file mpeg12dec.c.

Function Documentation

mpeg_decode_motion()

static int mpeg_decode_motion ( MpegEncContext *  s, int  fcode, int  pred  )

static

Definition at line 101 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg1_decode_block_inter()

static int mpeg1_decode_block_inter ( MpegEncContext *  s, int16_t *  block, int  n  )

inlinestatic

Definition at line 137 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg1_fast_decode_block_inter()

static int mpeg1_fast_decode_block_inter ( MpegEncContext *  s, int16_t *  block, int  n  )

inlinestatic

Changing this would eat up any speed benefits it has.

Do not use "fast" flag if you need the code to be robust.

Definition at line 226 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg2_decode_block_non_intra()

static int mpeg2_decode_block_non_intra ( MpegEncContext *  s, int16_t *  block, int  n  )

inlinestatic

Definition at line 311 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg2_fast_decode_block_non_intra()

static int mpeg2_fast_decode_block_non_intra ( MpegEncContext *  s, int16_t *  block, int  n  )

inlinestatic

Changing this would eat up any speed benefits it has.

Do not use "fast" flag if you need the code to be robust.

Definition at line 401 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg2_decode_block_intra()

static int mpeg2_decode_block_intra ( MpegEncContext *  s, int16_t *  block, int  n  )

inlinestatic

Definition at line 473 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg2_fast_decode_block_intra()

static int mpeg2_fast_decode_block_intra ( MpegEncContext *  s, int16_t *  block, int  n  )

inlinestatic

Changing this would eat up any speed benefits it has.

Do not use "fast" flag if you need the code to be robust.

Definition at line 562 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

get_dmv()

static int get_dmv ( MpegEncContext *  s )

inlinestatic

Definition at line 641 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg_decode_mb()

static int mpeg_decode_mb ( MpegEncContext *  s, int16_t  block[12][64]  )

static

Definition at line 655 of file mpeg12dec.c.

Referenced by mpeg_decode_slice().

mpeg_decode_init()

static av_cold int mpeg_decode_init ( AVCodecContext *  avctx )

static

Definition at line 1052 of file mpeg12dec.c.

quant_matrix_rebuild()

static void quant_matrix_rebuild ( uint16_t *  matrix, const uint8_t *  old_perm, const uint8_t *  new_perm  )

static

Definition at line 1108 of file mpeg12dec.c.

Referenced by mpeg_decode_postinit().

mpeg_get_pixelformat()

static enum AVPixelFormat mpeg_get_pixelformat ( AVCodecContext *  avctx )

static

Definition at line 1171 of file mpeg12dec.c.

Referenced by mpeg_decode_postinit(), and vcr2_init_sequence().

setup_hwaccel_for_pixfmt()

static void setup_hwaccel_for_pixfmt ( AVCodecContext *  avctx )

static

Definition at line 1192 of file mpeg12dec.c.

Referenced by mpeg_decode_postinit(), and vcr2_init_sequence().

mpeg_decode_postinit()

static int mpeg_decode_postinit ( AVCodecContext *  avctx )

static

Definition at line 1209 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg1_decode_picture()

static int mpeg1_decode_picture ( AVCodecContext *  avctx, const uint8_t *  buf, int  buf_size  )

static

Definition at line 1346 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_sequence_extension()

static void mpeg_decode_sequence_extension ( Mpeg1Context *  s1 )

static

Definition at line 1393 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_sequence_display_extension()

static void mpeg_decode_sequence_display_extension ( Mpeg1Context *  s1 )

static

Definition at line 1436 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_picture_display_extension()

static void mpeg_decode_picture_display_extension ( Mpeg1Context *  s1 )

static

Definition at line 1460 of file mpeg12dec.c.

Referenced by decode_chunks().

load_matrix()

static int load_matrix ( MpegEncContext *  s, uint16_t  matrix0[64], uint16_t  matrix1[64], int  intra  )

static

Definition at line 1494 of file mpeg12dec.c.

Referenced by mpeg1_decode_sequence(), and mpeg_decode_quant_matrix_extension().

mpeg_decode_quant_matrix_extension()

static void mpeg_decode_quant_matrix_extension ( MpegEncContext *  s )

static

Definition at line 1517 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_picture_coding_extension()

static void mpeg_decode_picture_coding_extension ( Mpeg1Context *  s1 )

static

Definition at line 1531 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_field_start()

static int mpeg_field_start ( MpegEncContext *  s, const uint8_t *  buf, int  buf_size  )

static

Definition at line 1590 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_slice()

static int mpeg_decode_slice ( MpegEncContext *  s, int  mb_y, const uint8_t **  buf, int  buf_size  )

static

Decode a slice.

MpegEncContext.mb_y must be set to the MB row from the startcode.

Returns

DECODE_SLICE_ERROR if the slice is damaged, DECODE_SLICE_OK if this slice is OK

Definition at line 1698 of file mpeg12dec.c.

Referenced by decode_chunks(), and slice_decode_thread().

slice_decode_thread()

static int slice_decode_thread ( AVCodecContext *  c, void *  arg  )

static

Definition at line 1975 of file mpeg12dec.c.

Referenced by decode_chunks().

slice_end()

static int slice_end ( AVCodecContext *  avctx, AVFrame *  pict  )

static

Handle slice ends.

Returns

1 if it seems to be the last slice

Definition at line 2026 of file mpeg12dec.c.

Referenced by alpha_composite(), amplify_frame(), apply_lut16(), apply_lut16_p(), apply_lut8(), apply_lut8_p(), blend_plane(), blend_slice_packed_rgb(), colorlevel_slice_16(), colorlevel_slice_8(), compute_sat_hue_metrics16(), compute_sat_hue_metrics8(), decode_chunks(), decode_frame(), decode_speedhq_field(), DEFINE_BLEND8(), diagonal_transformation(), distortion_correction_filter_slice(), do_chromahold_slice(), do_chromakey_slice(), do_colorhold_slice(), do_colorkey_slice(), do_despill_slice(), do_lumakey_slice16(), do_lumakey_slice8(), filter16_brng(), filter16_tout(), filter16_vrep(), filter8_brng(), filter8_tout(), filter8_vrep(), filter_color(), filter_color2(), filter_frame(), filter_horizontally(), filter_mono(), filter_postscale(), filter_rgb(), filter_slice(), filter_slice16(), filter_slice8(), filter_slice_alpha(), filter_slice_chroma(), filter_slice_grey_edge(), filter_slice_luma(), filter_slice_packed(), filter_slice_planar(), filter_slice_rgb(), filter_slice_rgba16_packed(), filter_slice_rgba16_planar(), filter_slice_rgba_packed(), filter_slice_rgba_planar(), filter_vertically(), hqx_filter(), lagfun_frame16(), lagfun_frame8(), lut_packed_16bits(), lut_packed_8bits(), lut_planar_16bits(), lut_planar_8bits(), maskedclamp16(), maskedclamp8(), median_frames16(), median_frames8(), mix_frames(), nlmeans_slice(), premultiply_slice(), process_slice_uyvy422(), process_slice_yuv420p(), process_slice_yuv422p(), process_slice_yuv444p(), slice_geq_filter(), slice_get_derivative(), slice_normalize(), tonemap_slice(), unsharp_slice(), vibrance_slice16(), vibrance_slice8(), vignetting_filter_slice(), and xbr_filter().

mpeg1_decode_sequence()

static int mpeg1_decode_sequence ( AVCodecContext *  avctx, const uint8_t *  buf, int  buf_size  )

static

Definition at line 2077 of file mpeg12dec.c.

Referenced by decode_chunks().

vcr2_init_sequence()

static int vcr2_init_sequence ( AVCodecContext *  avctx )

static

Definition at line 2166 of file mpeg12dec.c.

Referenced by mpeg_decode_frame().

mpeg_decode_a53_cc()

static int mpeg_decode_a53_cc ( AVCodecContext *  avctx, const uint8_t *  p, int  buf_size  )

static

Definition at line 2220 of file mpeg12dec.c.

Referenced by mpeg_decode_user_data().

mpeg_decode_user_data()

static void mpeg_decode_user_data ( AVCodecContext *  avctx, const uint8_t *  p, int  buf_size  )

static

Definition at line 2345 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_gop()

static void mpeg_decode_gop ( AVCodecContext *  avctx, const uint8_t *  buf, int  buf_size  )

static

Definition at line 2415 of file mpeg12dec.c.

Referenced by decode_chunks().

decode_chunks()

static int decode_chunks ( AVCodecContext *  avctx, AVFrame *  picture, int *  got_output, const uint8_t *  buf, int  buf_size  )

static

Definition at line 2448 of file mpeg12dec.c.

Referenced by mpeg_decode_frame().

mpeg_decode_frame()

static int mpeg_decode_frame ( AVCodecContext *  avctx, void *  data, int *  got_output, AVPacket *  avpkt  )

static

Definition at line 2774 of file mpeg12dec.c.

flush()

static void flush ( AVCodecContext *  avctx )

static

Definition at line 2849 of file mpeg12dec.c.

mpeg_decode_end()

static av_cold int mpeg_decode_end ( AVCodecContext *  avctx )

static

Definition at line 2858 of file mpeg12dec.c.

Variable Documentation

ptype2mb_type

const uint32_t ptype2mb_type[7]

static

Initial value:

= {
                    MB_TYPE_INTRA,
                    MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
                    MB_TYPE_L0,
                    MB_TYPE_L0 | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_INTRA,
    MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP | MB_TYPE_ZERO_MV | MB_TYPE_16x16,
    MB_TYPE_QUANT | MB_TYPE_L0 | MB_TYPE_CBP,
}

Definition at line 76 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

btype2mb_type

const uint32_t btype2mb_type[11]

static

Initial value:

= {
                    MB_TYPE_INTRA,
                    MB_TYPE_L1,
                    MB_TYPE_L1   | MB_TYPE_CBP,
                    MB_TYPE_L0,
                    MB_TYPE_L0   | MB_TYPE_CBP,
                    MB_TYPE_L0L1,
                    MB_TYPE_L0L1 | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_INTRA,
    MB_TYPE_QUANT | MB_TYPE_L1   | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_L0   | MB_TYPE_CBP,
    MB_TYPE_QUANT | MB_TYPE_L0L1 | MB_TYPE_CBP,
}

Definition at line 86 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

mpeg1_hwaccel_pixfmt_list_420

enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[]

static

Initial value:

= {
 
 
 
 
 
 
 
 
 
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_NONE
}

Definition at line 1120 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

mpeg2_hwaccel_pixfmt_list_420

enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[]

static

Initial value:

= {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_NONE
}

Definition at line 1134 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

mpeg12_pixfmt_list_422

enum AVPixelFormat mpeg12_pixfmt_list_422[]

static

Initial value:

= {
    AV_PIX_FMT_YUV422P,
    AV_PIX_FMT_NONE
}

Definition at line 1161 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

mpeg12_pixfmt_list_444

enum AVPixelFormat mpeg12_pixfmt_list_444[]

static

Initial value:

= {
    AV_PIX_FMT_YUV444P,
    AV_PIX_FMT_NONE
}

Definition at line 1166 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

ff_mpeg1video_decoder

AVCodec ff_mpeg1video_decoder

Definition at line 2868 of file mpeg12dec.c.

ff_mpeg2video_decoder

AVCodec ff_mpeg2video_decoder

Definition at line 2901 of file mpeg12dec.c.

ff_mpegvideo_decoder

AVCodec ff_mpegvideo_decoder

Initial value:

= {
    .name           = "mpegvideo",
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MPEG2VIDEO,
    .priv_data_size = sizeof(Mpeg1Context),
    .init           = mpeg_decode_init,
    .close          = mpeg_decode_end,
    .decode         = mpeg_decode_frame,
    .capabilities   = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_TRUNCATED | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
    .flush          = flush,
    .max_lowres     = 3,
}

Definition at line 2947 of file mpeg12dec.c.