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mpeg12dec.c File Reference

MPEG-1/2 decoder. More...

#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 "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 "thread.h"
#include "version.h"
#include "vdpau_compat.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 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_intra (MpegEncContext *s, int16_t *block, int n)
 
int ff_mpeg1_decode_block_intra (MpegEncContext *s, int16_t *block, int n)
 
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)
 Note: this function can read out of range and crash for corrupt streams. 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)
 Note: this function can read out of range and crash for corrupt streams. 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)
 Note: this function can read out of range and crash for corrupt streams. More...
 
static int get_dmv (MpegEncContext *s)
 
static int get_qscale (MpegEncContext *s)
 
static int mpeg_decode_mb (MpegEncContext *s, int16_t block[12][64])
 
static av_cold int mpeg_decode_init (AVCodecContext *avctx)
 
static int mpeg_decode_update_thread_context (AVCodecContext *avctx, const AVCodecContext *avctx_from)
 
static void quant_matrix_rebuild (uint16_t *matrix, const uint8_t *old_perm, const uint8_t *new_perm)
 
static int uses_vdpau (AVCodecContext *avctx)
 
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 const uint8_t non_linear_qscale [32]
 
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 []
 
static const AVProfile mpeg2_video_profiles []
 
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

#define UNCHECKED_BITSTREAM_READER   1

Definition at line 28 of file mpeg12dec.c.

#define MB_TYPE_ZERO_MV   0x20000000

Definition at line 73 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

#define check_scantable_index (   ctx,
  x 
)
Value:
do { \
if ((x) > 63) { \
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)
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
if
if()
Definition: avfilter.c:975
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
return
return
Definition: audio_convert.c:415

Definition at line 133 of file mpeg12dec.c.

Referenced by mpeg1_decode_block_inter(), mpeg1_decode_block_intra(), mpeg1_fast_decode_block_inter(), mpeg2_decode_block_intra(), and mpeg2_decode_block_non_intra().

#define MT_FIELD   1

Definition at line 729 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

#define MT_FRAME   2

Definition at line 730 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

#define MT_16X8   2

Definition at line 731 of file mpeg12dec.c.

#define MT_DMV   3

Definition at line 732 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

#define DECODE_SLICE_ERROR   -1

Definition at line 1743 of file mpeg12dec.c.

Referenced by mpeg_decode_slice().

#define DECODE_SLICE_OK   0

Definition at line 1744 of file mpeg12dec.c.

Referenced by mpeg_decode_slice().

Function Documentation

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

Definition at line 107 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

static int mpeg1_decode_block_intra ( MpegEncContext *  s,
int16_t *  block,
int  n 
)
inlinestatic

Definition at line 142 of file mpeg12dec.c.

Referenced by ff_mpeg1_decode_block_intra(), and mpeg_decode_mb().

int ff_mpeg1_decode_block_intra ( MpegEncContext *  s,
int16_t *  block,
int  n 
)

Definition at line 225 of file mpeg12dec.c.

Referenced by tqi_decode_mb().

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

Definition at line 230 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

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

Note: this function can read out of range and crash for corrupt streams.

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 315 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

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

Definition at line 395 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

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

Note: this function can read out of range and crash for corrupt streams.

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 482 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

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

Definition at line 547 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

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

Note: this function can read out of range and crash for corrupt streams.

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 633 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

static int get_dmv ( MpegEncContext *  s)
inlinestatic

Definition at line 710 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

static int get_qscale ( MpegEncContext *  s)
inlinestatic

Definition at line 718 of file mpeg12dec.c.

Referenced by mpeg_decode_mb(), and mpeg_decode_slice().

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

Definition at line 734 of file mpeg12dec.c.

Referenced by mpeg_decode_slice().

static av_cold int mpeg_decode_init ( AVCodecContext *  avctx)
static

Definition at line 1120 of file mpeg12dec.c.

static int mpeg_decode_update_thread_context ( AVCodecContext *  avctx,
const AVCodecContext *  avctx_from 
)
static

Definition at line 1148 of file mpeg12dec.c.

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

Definition at line 1173 of file mpeg12dec.c.

static int uses_vdpau ( AVCodecContext *  avctx)
inlinestatic

Definition at line 1228 of file mpeg12dec.c.

Referenced by decode_chunks(), and setup_hwaccel_for_pixfmt().

static enum AVPixelFormat mpeg_get_pixelformat ( AVCodecContext *  avctx)
static

Definition at line 1232 of file mpeg12dec.c.

Referenced by vcr2_init_sequence().

static void setup_hwaccel_for_pixfmt ( AVCodecContext *  avctx)
static

Definition at line 1253 of file mpeg12dec.c.

Referenced by vcr2_init_sequence().

static int mpeg_decode_postinit ( AVCodecContext *  avctx)
static

Definition at line 1273 of file mpeg12dec.c.

Referenced by decode_chunks().

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

Definition at line 1408 of file mpeg12dec.c.

Referenced by decode_chunks().

static void mpeg_decode_sequence_extension ( Mpeg1Context *  s1)
static

Definition at line 1455 of file mpeg12dec.c.

Referenced by decode_chunks().

static void mpeg_decode_sequence_display_extension ( Mpeg1Context *  s1)
static

Definition at line 1492 of file mpeg12dec.c.

Referenced by decode_chunks().

static void mpeg_decode_picture_display_extension ( Mpeg1Context *  s1)
static

Definition at line 1516 of file mpeg12dec.c.

Referenced by decode_chunks().

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

Definition at line 1550 of file mpeg12dec.c.

Referenced by mpeg1_decode_sequence(), and mpeg_decode_quant_matrix_extension().

static void mpeg_decode_quant_matrix_extension ( MpegEncContext *  s)
static

Definition at line 1573 of file mpeg12dec.c.

Referenced by decode_chunks().

static void mpeg_decode_picture_coding_extension ( Mpeg1Context *  s1)
static

Definition at line 1587 of file mpeg12dec.c.

Referenced by decode_chunks().

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

Definition at line 1646 of file mpeg12dec.c.

Referenced by decode_chunks().

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 1752 of file mpeg12dec.c.

Referenced by decode_chunks(), and slice_decode_thread().

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

Definition at line 2022 of file mpeg12dec.c.

Referenced by decode_chunks().

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 2073 of file mpeg12dec.c.

Referenced by compute_sat_hue_metrics(), decode_chunks(), decode_frame(), filter_brng(), filter_rgb(), filter_slice(), filter_slice_alpha(), filter_slice_chroma(), filter_slice_luma(), filter_slice_rgb(), filter_tout(), filter_vrep(), hqx_filter(), process_slice_uyvy422(), process_slice_yuv420p(), process_slice_yuv422p(), and xbr_filter().

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

Definition at line 2121 of file mpeg12dec.c.

Referenced by decode_chunks().

static int vcr2_init_sequence ( AVCodecContext *  avctx)
static

Definition at line 2209 of file mpeg12dec.c.

Referenced by mpeg_decode_frame().

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

Definition at line 2263 of file mpeg12dec.c.

Referenced by mpeg_decode_user_data().

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

Definition at line 2316 of file mpeg12dec.c.

Referenced by decode_chunks().

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

Definition at line 2391 of file mpeg12dec.c.

Referenced by decode_chunks().

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

Definition at line 2418 of file mpeg12dec.c.

Referenced by mpeg_decode_frame().

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

Definition at line 2749 of file mpeg12dec.c.

static void flush ( AVCodecContext *  avctx)
static

Definition at line 2811 of file mpeg12dec.c.

static av_cold int mpeg_decode_end ( AVCodecContext *  avctx)
static

Definition at line 2820 of file mpeg12dec.c.

Variable Documentation

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,
}
MB_TYPE_INTRA
#define MB_TYPE_INTRA
Definition: mpegutils.h:69
MB_TYPE_QUANT
#define MB_TYPE_QUANT
Definition: avcodec.h:913
MB_TYPE_16x16
#define MB_TYPE_16x16
Definition: avcodec.h:897
MB_TYPE_CBP
#define MB_TYPE_CBP
Definition: avcodec.h:914
MB_TYPE_ZERO_MV
#define MB_TYPE_ZERO_MV
Definition: mpeg12dec.c:73
MB_TYPE_L0
#define MB_TYPE_L0
Definition: avcodec.h:910

Definition at line 75 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

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,
}
MB_TYPE_INTRA
#define MB_TYPE_INTRA
Definition: mpegutils.h:69
MB_TYPE_QUANT
#define MB_TYPE_QUANT
Definition: avcodec.h:913
MB_TYPE_L0L1
#define MB_TYPE_L0L1
Definition: avcodec.h:912
MB_TYPE_L1
#define MB_TYPE_L1
Definition: avcodec.h:911
MB_TYPE_CBP
#define MB_TYPE_CBP
Definition: avcodec.h:914
MB_TYPE_L0
#define MB_TYPE_L0
Definition: avcodec.h:910

Definition at line 85 of file mpeg12dec.c.

Referenced by mpeg_decode_mb().

const uint8_t non_linear_qscale[32]
static
Initial value:
= {
0, 1, 2, 3, 4, 5, 6, 7,
8, 10, 12, 14, 16, 18, 20, 22,
24, 28, 32, 36, 40, 44, 48, 52,
56, 64, 72, 80, 88, 96, 104, 112,
}

Definition at line 99 of file mpeg12dec.c.

Referenced by get_qscale().

enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[]
static
Initial value:
= {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NONE
}
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63

Definition at line 1185 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

enum AVPixelFormat mpeg2_hwaccel_pixfmt_list_420[]
static
Initial value:
= {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NONE
}
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63

Definition at line 1197 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

enum AVPixelFormat mpeg12_pixfmt_list_422[]
static
Initial value:
= {
AV_PIX_FMT_YUV422P,
AV_PIX_FMT_NONE
}
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67

Definition at line 1218 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

enum AVPixelFormat mpeg12_pixfmt_list_444[]
static
Initial value:
= {
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_NONE
}
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68

Definition at line 1223 of file mpeg12dec.c.

Referenced by mpeg_get_pixelformat().

const AVProfile mpeg2_video_profiles[]
static
Initial value:
= {
{ FF_PROFILE_MPEG2_422, "4:2:2" },
{ FF_PROFILE_MPEG2_HIGH, "High" },
{ FF_PROFILE_MPEG2_SS, "Spatially Scalable" },
{ FF_PROFILE_MPEG2_SNR_SCALABLE, "SNR Scalable" },
{ FF_PROFILE_MPEG2_MAIN, "Main" },
{ FF_PROFILE_MPEG2_SIMPLE, "Simple" },
{ FF_PROFILE_RESERVED, "Reserved" },
{ FF_PROFILE_RESERVED, "Reserved" },
{ FF_PROFILE_UNKNOWN },
}
FF_PROFILE_MPEG2_SNR_SCALABLE
#define FF_PROFILE_MPEG2_SNR_SCALABLE
Definition: avcodec.h:2860
FF_PROFILE_MPEG2_SS
#define FF_PROFILE_MPEG2_SS
Definition: avcodec.h:2859
FF_PROFILE_RESERVED
#define FF_PROFILE_RESERVED
Definition: avcodec.h:2837
FF_PROFILE_UNKNOWN
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:2836
FF_PROFILE_MPEG2_MAIN
#define FF_PROFILE_MPEG2_MAIN
Definition: avcodec.h:2861
FF_PROFILE_MPEG2_HIGH
#define FF_PROFILE_MPEG2_HIGH
Definition: avcodec.h:2858
FF_PROFILE_MPEG2_SIMPLE
#define FF_PROFILE_MPEG2_SIMPLE
Definition: avcodec.h:2862
FF_PROFILE_MPEG2_422
#define FF_PROFILE_MPEG2_422
Definition: avcodec.h:2857

Definition at line 2830 of file mpeg12dec.c.

AVCodec ff_mpeg1video_decoder
Initial value:
= {
.name = "mpeg1video",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG1VIDEO,
.priv_data_size = sizeof(Mpeg1Context),
.init = mpeg_decode_init,
.close = mpeg_decode_end,
.decode = mpeg_decode_frame,
.capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
CODEC_CAP_SLICE_THREADS,
.flush = flush,
.max_lowres = 3,
.update_thread_context = ONLY_IF_THREADS_ENABLED(mpeg_decode_update_thread_context)
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
CODEC_CAP_TRUNCATED
#define CODEC_CAP_TRUNCATED
Definition: avcodec.h:790
mpeg_decode_init
static av_cold int mpeg_decode_init(AVCodecContext *avctx)
Definition: mpeg12dec.c:1120
mpeg_decode_update_thread_context
static int mpeg_decode_update_thread_context(AVCodecContext *avctx, const AVCodecContext *avctx_from)
Definition: mpeg12dec.c:1148
CODEC_CAP_DR1
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:789
AV_CODEC_ID_MPEG1VIDEO
Definition: avcodec.h:106
CODEC_CAP_DELAY
#define CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:824
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:214
update_thread_context
static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
Definition: ffv1dec.c:1058
CODEC_CAP_DRAW_HORIZ_BAND
#define CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:783
mpeg_decode_end
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2820
mpeg_decode_frame
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2749
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:522
CODEC_CAP_SLICE_THREADS
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:870
flush
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2811
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:194

Definition at line 2842 of file mpeg12dec.c.

AVCodec ff_mpeg2video_decoder
Initial value:
= {
.name = "mpeg2video",
.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 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 = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
CODEC_CAP_SLICE_THREADS,
.flush = flush,
.max_lowres = 3,
.profiles = NULL_IF_CONFIG_SMALL(mpeg2_video_profiles),
}
mpeg2_video_profiles
static const AVProfile mpeg2_video_profiles[]
Definition: mpeg12dec.c:2830
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
CODEC_CAP_TRUNCATED
#define CODEC_CAP_TRUNCATED
Definition: avcodec.h:790
mpeg_decode_init
static av_cold int mpeg_decode_init(AVCodecContext *avctx)
Definition: mpeg12dec.c:1120
CODEC_CAP_DR1
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:789
CODEC_CAP_DELAY
#define CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:824
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
CODEC_CAP_DRAW_HORIZ_BAND
#define CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:783
mpeg_decode_end
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2820
AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:107
profiles
static const AVProfile profiles[]
Definition: aacdec.c:3543
mpeg_decode_frame
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2749
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:522
CODEC_CAP_SLICE_THREADS
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:870
flush
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2811
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:194

Definition at line 2859 of file mpeg12dec.c.

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 = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
.flush = flush,
.max_lowres = 3,
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
CODEC_CAP_TRUNCATED
#define CODEC_CAP_TRUNCATED
Definition: avcodec.h:790
mpeg_decode_init
static av_cold int mpeg_decode_init(AVCodecContext *avctx)
Definition: mpeg12dec.c:1120
CODEC_CAP_DR1
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:789
CODEC_CAP_DELAY
#define CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:824
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
CODEC_CAP_DRAW_HORIZ_BAND
#define CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:783
mpeg_decode_end
static av_cold int mpeg_decode_end(AVCodecContext *avctx)
Definition: mpeg12dec.c:2820
AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:107
mpeg_decode_frame
static int mpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_output, AVPacket *avpkt)
Definition: mpeg12dec.c:2749
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:522
CODEC_CAP_SLICE_THREADS
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:870
flush
static void flush(AVCodecContext *avctx)
Definition: mpeg12dec.c:2811
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:194

Definition at line 2877 of file mpeg12dec.c.

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