mpeg12dec.c File Reference

#include "config_components.h"
#include <inttypes.h>
#include "libavutil/attributes.h"
#include "libavutil/emms.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/mem_internal.h"
#include "libavutil/reverse.h"
#include "libavutil/stereo3d.h"
#include "libavutil/timecode.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "error_resilience.h"
#include "hwaccel_internal.h"
#include "hwconfig.h"
#include "idctdsp.h"
#include "internal.h"
#include "mpeg_er.h"
#include "mpeg12.h"
#include "mpeg12codecs.h"
#include "mpeg12data.h"
#include "mpeg12dec.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
#include "mpegvideodec.h"
#include "profiles.h"
#include "startcode.h"
#include "thread.h"

Go to the source code of this file.

Data Structures
struct	Mpeg1Context
struct	IPUContext

Macros
#define	UNCHECKED_BITSTREAM_READER   1
#define	A53_MAX_CC_COUNT   2000
#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
#define	M2V_OFFSET(x)   offsetof(Mpeg1Context, x)
#define	M2V_PARAM   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Enumerations
enum	Mpeg2ClosedCaptionsFormat { CC_FORMAT_AUTO, CC_FORMAT_A53_PART4, CC_FORMAT_SCTE20, CC_FORMAT_DVD }

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	mpeg2_decode_block_non_intra (MpegEncContext *s, int16_t *block, int n)
static int	mpeg2_decode_block_intra (MpegEncContext *s, int16_t *block, int n)
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 enum AVPixelFormat	mpeg_get_pixelformat (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 int	mpeg_decode_picture_coding_extension (Mpeg1Context *s1)
static int	mpeg_field_start (Mpeg1Context *s1, 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, int *got_output)
	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 void	mpeg_set_cc_format (AVCodecContext *avctx, enum Mpeg2ClosedCaptionsFormat format, const char *label)
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 int	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, AVFrame *picture, int *got_output, AVPacket *avpkt)
static void	flush (AVCodecContext *avctx)
static av_cold int	mpeg_decode_end (AVCodecContext *avctx)
static int	ipu_decode_frame (AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static av_cold int	ipu_decode_init (AVCodecContext *avctx)

Variables
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 []
const FFCodec	ff_mpeg1video_decoder
static const AVOption	mpeg2video_options []
static const AVClass	mpeg2video_class
const FFCodec	ff_mpeg2video_decoder
const FFCodec	ff_mpegvideo_decoder
const FFCodec	ff_ipu_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 30 of file mpeg12dec.c.

A53_MAX_CC_COUNT

#define A53_MAX_CC_COUNT   2000

Definition at line 63 of file mpeg12dec.c.

MAX_INDEX

#define MAX_INDEX   (64 - 1)

Definition at line 123 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 124 of file mpeg12dec.c.

MT_FIELD

#define MT_FIELD   1

Definition at line 396 of file mpeg12dec.c.

MT_FRAME

#define MT_FRAME   2

Definition at line 397 of file mpeg12dec.c.

MT_16X8

#define MT_16X8   2

Definition at line 398 of file mpeg12dec.c.

MT_DMV

#define MT_DMV   3

Definition at line 399 of file mpeg12dec.c.

DECODE_SLICE_ERROR

#define DECODE_SLICE_ERROR   -1

Definition at line 1381 of file mpeg12dec.c.

DECODE_SLICE_OK

#define DECODE_SLICE_OK   0

Definition at line 1382 of file mpeg12dec.c.

M2V_OFFSET

#define M2V_OFFSET

(

x

)

offsetof(Mpeg1Context, x)

Definition at line 2616 of file mpeg12dec.c.

M2V_PARAM

#define M2V_PARAM   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 2617 of file mpeg12dec.c.

Enumeration Type Documentation

Mpeg2ClosedCaptionsFormat

enum Mpeg2ClosedCaptionsFormat

Enumerator
CC_FORMAT_AUTO
CC_FORMAT_A53_PART4
CC_FORMAT_SCTE20
CC_FORMAT_DVD

Definition at line 65 of file mpeg12dec.c.

Function Documentation

mpeg_decode_motion()

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

static

Definition at line 97 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 133 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 217 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 302 of file mpeg12dec.c.

Referenced by ipu_decode_frame(), and mpeg_decode_mb().

get_dmv()

static int get_dmv ( MpegEncContext *  s )

inlinestatic

Definition at line 387 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 401 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 764 of file mpeg12dec.c.

mpeg_get_pixelformat()

static enum AVPixelFormat mpeg_get_pixelformat ( AVCodecContext *  avctx )

static

Definition at line 857 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 880 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 1009 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_sequence_extension()

static void mpeg_decode_sequence_extension ( Mpeg1Context *  s1 )

static

Definition at line 1056 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 1099 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 1123 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 1157 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 1180 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_picture_coding_extension()

static int mpeg_decode_picture_coding_extension ( Mpeg1Context *  s1 )

static

Definition at line 1194 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_field_start()

static int mpeg_field_start ( Mpeg1Context *  s1, const uint8_t *  buf, int  buf_size  )

static

Definition at line 1252 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 1390 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 1666 of file mpeg12dec.c.

Referenced by decode_chunks().

slice_end()

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

static

Handle slice ends.

Returns

1 if it seems to be the last slice

Definition at line 1719 of file mpeg12dec.c.

Referenced by allocate_plane(), average_slice16(), average_slice8(), bilateralo_planes(), blend_frame_partial(), blend_slice_packed_rgb(), blur_planes(), box_slice(), cas_slice16(), cas_slice8(), check_sobel(), clear_slice16(), clear_slice8(), color_balance16(), color_balance16_p(), color_balance8(), color_balance8_p(), colorcontrast_slice16(), colorcontrast_slice16p(), colorcontrast_slice8(), colorcontrast_slice8p(), colorcorrect_slice16(), colorcorrect_slice8(), colorize_slice16(), colorize_slice8(), colorizey_slice16(), colorizey_slice8(), colormap_slice(), compute_images_identity(), compute_images_msad(), compute_images_mse(), compute_sat_hue_metrics16(), compute_sat_hue_metrics8(), convert_frame(), convert_frame_partial(), copy_horizontal(), copy_vertical(), correct_frame(), decode_chunks(), decode_frame(), decode_speedhq_field(), denoise(), diagonal_transformation(), displace_packed(), displace_planar(), distortion_correction_filter_slice(), do_backgroundkey16_slice(), do_backgroundkey_slice(), do_chromahold16_slice(), do_chromahold_slice(), do_chromakey16_slice(), do_chromakey_slice(), do_despill_slice(), do_hsvhold16_slice(), do_hsvhold_slice(), do_hsvkey16_slice(), do_hsvkey_slice(), do_lumakey_slice16(), do_lumakey_slice8(), do_slice(), epx2_slice(), epx3_slice(), exposure_slice(), fade(), ff_sws_slice_worker(), filter16_brng(), filter16_tout(), filter16_vrep(), filter8_brng(), filter8_tout(), filter8_vrep(), filter_color(), filter_color2(), filter_horizontally(), filter_mono(), filter_postscale(), filter_rgb(), filter_rgb_planar(), filter_slice(), filter_slice_alpha(), filter_slice_alpha16(), filter_slice_chroma(), filter_slice_chroma16(), filter_slice_grey_edge(), filter_slice_luma(), filter_slice_luma16(), filter_slice_packed(), filter_slice_planar(), filter_slice_rgb(), filter_slice_rgba_packed(), filter_slice_rgba_planar(), filter_vertically(), hqx_filter(), irdft_horizontal16(), irdft_horizontal8(), irdft_vertical(), limitdiff_slice(), lut_packed_16bits(), lut_packed_8bits(), lut_planar_16bits(), lut_planar_8bits(), maskedclamp_slice(), maskedminmax_slice(), minmax_slice16(), minmax_slice8(), monochrome_slice16(), monochrome_slice8(), multiply_data(), multiply_slice(), nlmeans_slice(), pixelize_slice(), premultiply_slice(), process_slice_uyvy422(), process_slice_yuv420p(), process_slice_yuv422p(), process_slice_yuv444p(), qoa_decode_frame(), rdft_horizontal16(), rdft_horizontal8(), rdft_vertical(), scroll_slice(), slice_geq_filter(), slice_get_derivative(), slice_normalize(), slice_params(), ssim_plane(), ssim_plane_16bit(), super2xsai(), temperature_slice16(), temperature_slice16p(), temperature_slice32(), temperature_slice8(), temperature_slice8p(), threshold_slice(), tonemap_slice(), v210_decode_slice(), v360_slice(), v410_decode_slice(), verti_slice_c(), vibrance_slice16(), vibrance_slice16p(), vibrance_slice8(), vibrance_slice8p(), vif_filter1d(), vignetting_filter_slice(), xbr_filter(), and xfade_slice().

mpeg1_decode_sequence()

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

static

Definition at line 1769 of file mpeg12dec.c.

Referenced by decode_chunks().

vcr2_init_sequence()

static int vcr2_init_sequence ( AVCodecContext *  avctx )

static

Definition at line 1858 of file mpeg12dec.c.

Referenced by mpeg_decode_frame().

mpeg_set_cc_format()

static void mpeg_set_cc_format ( AVCodecContext *  avctx, enum Mpeg2ClosedCaptionsFormat  format, const char *  label  )

static

Definition at line 1908 of file mpeg12dec.c.

Referenced by mpeg_decode_a53_cc().

mpeg_decode_a53_cc()

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

static

Definition at line 1924 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 2066 of file mpeg12dec.c.

Referenced by decode_chunks().

mpeg_decode_gop()

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

static

Definition at line 2136 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 2167 of file mpeg12dec.c.

Referenced by mpeg_decode_frame().

mpeg_decode_frame()

static int mpeg_decode_frame ( AVCodecContext *  avctx, AVFrame *  picture, int *  got_output, AVPacket *  avpkt  )

static

Definition at line 2501 of file mpeg12dec.c.

flush()

static void flush ( AVCodecContext *  avctx )

static

Definition at line 2568 of file mpeg12dec.c.

mpeg_decode_end()

static av_cold int mpeg_decode_end ( AVCodecContext *  avctx )

static

Definition at line 2579 of file mpeg12dec.c.

ipu_decode_frame()

static int ipu_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 2712 of file mpeg12dec.c.

ipu_decode_init()

static av_cold int ipu_decode_init ( AVCodecContext *  avctx )

static

Definition at line 2807 of file mpeg12dec.c.

Variable Documentation

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 809 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 820 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 847 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 852 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

ff_mpeg1video_decoder

const FFCodec ff_mpeg1video_decoder

Initial value:

= {
    .p.name                = "mpeg1video",
    CODEC_LONG_NAME("MPEG-1 video"),
    .p.type                = AVMEDIA_TYPE_VIDEO,
    .p.id                  = AV_CODEC_ID_MPEG1VIDEO,
    .priv_data_size        = sizeof(Mpeg1Context),
    .init                  = mpeg_decode_init,
    .close                 = mpeg_decode_end,
    FF_CODEC_DECODE_CB(mpeg_decode_frame),
    .p.capabilities        = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1 |
                             AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
    .caps_internal         = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
    .flush                 = flush,
    .p.max_lowres          = 3,
    UPDATE_THREAD_CONTEXT(mpeg_decode_update_thread_context),
    .hw_configs            = (const AVCodecHWConfigInternal *const []) {
 
 
 
 
 
 
 
 
 
                               NULL
                           },
}

Definition at line 2587 of file mpeg12dec.c.

mpeg2video_options

const AVOption mpeg2video_options[]

static

Initial value:

= {
    { "cc_format", "extract a specific Closed Captions format",
       M2V_OFFSET(cc_format), AV_OPT_TYPE_INT, { .i64 = CC_FORMAT_AUTO },
        CC_FORMAT_AUTO, CC_FORMAT_DVD, M2V_PARAM, .unit = "cc_format" },
 
       { "auto",   "pick first seen CC substream",  0, AV_OPT_TYPE_CONST,
        { .i64 =   CC_FORMAT_AUTO },                .flags = M2V_PARAM, .unit = "cc_format" },
       { "a53",    "pick A/53 Part 4 CC substream", 0, AV_OPT_TYPE_CONST,
        { .i64 =   CC_FORMAT_A53_PART4 },           .flags = M2V_PARAM, .unit = "cc_format" },
       { "scte20", "pick SCTE-20 CC substream",     0, AV_OPT_TYPE_CONST,
        { .i64 =   CC_FORMAT_SCTE20 },              .flags = M2V_PARAM, .unit = "cc_format" },
       { "dvd",    "pick DVD CC substream",         0, AV_OPT_TYPE_CONST,
        { .i64 =   CC_FORMAT_DVD },                 .flags = M2V_PARAM, .unit = "cc_format" },
    { NULL }
}

Definition at line 2619 of file mpeg12dec.c.

mpeg2video_class

const AVClass mpeg2video_class

static

Initial value:

= {
    .class_name = "MPEG-2 video",
    .item_name  = av_default_item_name,
    .option     = mpeg2video_options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DECODER,
}

Definition at line 2635 of file mpeg12dec.c.

ff_mpeg2video_decoder

const FFCodec ff_mpeg2video_decoder

Definition at line 2643 of file mpeg12dec.c.

ff_mpegvideo_decoder

const FFCodec ff_mpegvideo_decoder

Initial value:

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

Definition at line 2689 of file mpeg12dec.c.

ff_ipu_decoder

const FFCodec ff_ipu_decoder

Initial value:

= {
    .p.name         = "ipu",
    CODEC_LONG_NAME("IPU Video"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_IPU,
    .priv_data_size = sizeof(IPUContext),
    .init           = ipu_decode_init,
    FF_CODEC_DECODE_CB(ipu_decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
}

Definition at line 2828 of file mpeg12dec.c.