FFmpeg
Data Structures | Macros | Functions | Variables
dnxhddec.c File Reference
#include "libavutil/imgutils.h"
#include "libavutil/timer.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "get_bits.h"
#include "dnxhddata.h"
#include "idctdsp.h"
#include "internal.h"
#include "profiles.h"
#include "thread.h"

Go to the source code of this file.

Data Structures

struct  RowContext
 
struct  DNXHDContext
 

Macros

#define UNCHECKED_BITSTREAM_READER   1
 
#define DNXHD_VLC_BITS   9
 
#define DNXHD_DC_VLC_BITS   7
 

Functions

static int dnxhd_decode_dct_block_8 (const DNXHDContext *ctx, RowContext *row, int n)
 
static int dnxhd_decode_dct_block_10 (const DNXHDContext *ctx, RowContext *row, int n)
 
static int dnxhd_decode_dct_block_10_444 (const DNXHDContext *ctx, RowContext *row, int n)
 
static int dnxhd_decode_dct_block_12 (const DNXHDContext *ctx, RowContext *row, int n)
 
static int dnxhd_decode_dct_block_12_444 (const DNXHDContext *ctx, RowContext *row, int n)
 
static av_cold int dnxhd_decode_init (AVCodecContext *avctx)
 
static int dnxhd_init_vlc (DNXHDContext *ctx, uint32_t cid, int bitdepth)
 
static av_cold int dnxhd_decode_init_thread_copy (AVCodecContext *avctx)
 
static int dnxhd_get_profile (int cid)
 
static int dnxhd_decode_header (DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size, int first_field)
 
static av_always_inline int dnxhd_decode_dct_block (const DNXHDContext *ctx, RowContext *row, int n, int index_bits, int level_bias, int level_shift, int dc_shift)
 
static int dnxhd_decode_macroblock (const DNXHDContext *ctx, RowContext *row, AVFrame *frame, int x, int y)
 
static int dnxhd_decode_row (AVCodecContext *avctx, void *data, int rownb, int threadnb)
 
static int dnxhd_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static av_cold int dnxhd_decode_close (AVCodecContext *avctx)
 

Variables

AVCodec ff_dnxhd_decoder
 

Macro Definition Documentation

◆ UNCHECKED_BITSTREAM_READER

#define UNCHECKED_BITSTREAM_READER   1

Definition at line 31 of file dnxhddec.c.

◆ DNXHD_VLC_BITS

#define DNXHD_VLC_BITS   9

Definition at line 78 of file dnxhddec.c.

◆ DNXHD_DC_VLC_BITS

#define DNXHD_DC_VLC_BITS   7

Definition at line 79 of file dnxhddec.c.

Function Documentation

◆ dnxhd_decode_dct_block_8()

static int dnxhd_decode_dct_block_8 ( const DNXHDContext *  ctx,
RowContext *  row,
int  n 
)
static

Definition at line 462 of file dnxhddec.c.

Referenced by dnxhd_decode_header().

◆ dnxhd_decode_dct_block_10()

static int dnxhd_decode_dct_block_10 ( const DNXHDContext *  ctx,
RowContext *  row,
int  n 
)
static

Definition at line 468 of file dnxhddec.c.

Referenced by dnxhd_decode_header().

◆ dnxhd_decode_dct_block_10_444()

static int dnxhd_decode_dct_block_10_444 ( const DNXHDContext *  ctx,
RowContext *  row,
int  n 
)
static

Definition at line 474 of file dnxhddec.c.

Referenced by dnxhd_decode_header().

◆ dnxhd_decode_dct_block_12()

static int dnxhd_decode_dct_block_12 ( const DNXHDContext *  ctx,
RowContext *  row,
int  n 
)
static

Definition at line 480 of file dnxhddec.c.

Referenced by dnxhd_decode_header().

◆ dnxhd_decode_dct_block_12_444()

static int dnxhd_decode_dct_block_12_444 ( const DNXHDContext *  ctx,
RowContext *  row,
int  n 
)
static

Definition at line 486 of file dnxhddec.c.

Referenced by dnxhd_decode_header().

◆ dnxhd_decode_init()

static av_cold int dnxhd_decode_init ( AVCodecContext *  avctx)
static

Definition at line 92 of file dnxhddec.c.

◆ dnxhd_init_vlc()

static int dnxhd_init_vlc ( DNXHDContext *  ctx,
uint32_t  cid,
int  bitdepth 
)
static

Definition at line 112 of file dnxhddec.c.

Referenced by dnxhd_decode_header().

◆ dnxhd_decode_init_thread_copy()

static av_cold int dnxhd_decode_init_thread_copy ( AVCodecContext *  avctx)
static

Definition at line 156 of file dnxhddec.c.

◆ dnxhd_get_profile()

static int dnxhd_get_profile ( int  cid)
static

Definition at line 171 of file dnxhddec.c.

Referenced by dnxhd_decode_header().

◆ dnxhd_decode_header()

static int dnxhd_decode_header ( DNXHDContext *  ctx,
AVFrame *  frame,
const uint8_t *  buf,
int  buf_size,
int  first_field 
)
static

Definition at line 188 of file dnxhddec.c.

Referenced by dnxhd_decode_frame().

◆ dnxhd_decode_dct_block()

static av_always_inline int dnxhd_decode_dct_block ( const DNXHDContext *  ctx,
RowContext *  row,
int  n,
int  index_bits,
int  level_bias,
int  level_shift,
int  dc_shift 
)
static

Definition at line 357 of file dnxhddec.c.

Referenced by dnxhd_decode_dct_block_10(), dnxhd_decode_dct_block_10_444(), dnxhd_decode_dct_block_12(), dnxhd_decode_dct_block_12_444(), and dnxhd_decode_dct_block_8().

◆ dnxhd_decode_macroblock()

static int dnxhd_decode_macroblock ( const DNXHDContext *  ctx,
RowContext *  row,
AVFrame *  frame,
int  x,
int  y 
)
static

Definition at line 492 of file dnxhddec.c.

Referenced by dnxhd_decode_row().

◆ dnxhd_decode_row()

static int dnxhd_decode_row ( AVCodecContext *  avctx,
void *  data,
int  rownb,
int  threadnb 
)
static

Definition at line 594 of file dnxhddec.c.

Referenced by dnxhd_decode_frame().

◆ dnxhd_decode_frame()

static int dnxhd_decode_frame ( AVCodecContext *  avctx,
void *  data,
int *  got_frame,
AVPacket *  avpkt 
)
static

Definition at line 623 of file dnxhddec.c.

◆ dnxhd_decode_close()

static av_cold int dnxhd_decode_close ( AVCodecContext *  avctx)
static

Definition at line 723 of file dnxhddec.c.

Variable Documentation

◆ ff_dnxhd_decoder

AVCodec ff_dnxhd_decoder
Initial value:
= {
.name = "dnxhd",
.long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_DNXHD,
.priv_data_size = sizeof(DNXHDContext),
.init = dnxhd_decode_init,
.close = dnxhd_decode_close,
.decode = dnxhd_decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
AV_CODEC_CAP_SLICE_THREADS,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(dnxhd_decode_init_thread_copy),
.profiles = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
}

Definition at line 736 of file dnxhddec.c.

init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
DNXHDContext
Definition: dnxhddec.c:51
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
dnxhd_decode_close
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
Definition: dnxhddec.c:723
dnxhd_decode_frame
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dnxhddec.c:623
ff_dnxhd_profiles
const AVProfile ff_dnxhd_profiles[]
Definition: profiles.c:48
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1037
dnxhd_decode_init_thread_copy
static av_cold int dnxhd_decode_init_thread_copy(AVCodecContext *avctx)
Definition: dnxhddec.c:156
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:227
dnxhd_decode_init
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
Definition: dnxhddec.c:92
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:981
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:188
init_thread_copy
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have add an init_thread_copy() which re-allocates them for other threads. Add AV_CODEC_CAP_FRAME_THREADS to the codec capabilities. There will be very little speed gain at this point but it should work. If there are inter-frame dependencies
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1041
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_CODEC_ID_DNXHD
@ AV_CODEC_ID_DNXHD
Definition: avcodec.h:317
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