FFmpeg
Macros | Functions | Variables
ffv1dec.c File Reference
#include "libavutil/avassert.h"
#include "libavutil/crc.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/timer.h"
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
#include "rangecoder.h"
#include "golomb.h"
#include "mathops.h"
#include "ffv1.h"
#include "ffv1dec_template.c"

Go to the source code of this file.

Macros

#define TYPE   int16_t
 
#define RENAME(name)   name
 
#define TYPE   int32_t
 
#define RENAME(name)   name ## 32
 

Functions

static av_flatten int get_symbol_inline (RangeCoder *c, uint8_t *state, int is_signed)
 
static av_noinline int get_symbol (RangeCoder *c, uint8_t *state, int is_signed)
 
static int get_vlc_symbol (GetBitContext *gb, VlcState *const state, int bits)
 
static int is_input_end (FFV1Context *s)
 
static int decode_plane (FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index, int pixel_stride)
 
static int decode_slice_header (FFV1Context *f, FFV1Context *fs)
 
static int decode_slice (AVCodecContext *c, void *arg)
 
static int read_quant_table (RangeCoder *c, int16_t *quant_table, int scale)
 
static int read_quant_tables (RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256])
 
static int read_extra_header (FFV1Context *f)
 
static int read_header (FFV1Context *f)
 
static av_cold int decode_init (AVCodecContext *avctx)
 
static int decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
 
static void copy_fields (FFV1Context *fsdst, FFV1Context *fssrc, FFV1Context *fsrc)
 

Variables

AVCodec ff_ffv1_decoder
 

Detailed Description

FF Video Codec 1 (a lossless codec) decoder

Definition in file ffv1dec.c.

Macro Definition Documentation

◆ TYPE [1/2]

#define TYPE   int16_t

Definition at line 115 of file ffv1dec.c.

◆ RENAME [1/2]

#define RENAME (   name)    name

Definition at line 116 of file ffv1dec.c.

◆ TYPE [2/2]

#define TYPE   int32_t

Definition at line 115 of file ffv1dec.c.

◆ RENAME [2/2]

#define RENAME (   name)    name ## 32

Definition at line 116 of file ffv1dec.c.

Function Documentation

◆ get_symbol_inline()

static av_flatten int get_symbol_inline ( RangeCoder *  c,
uint8_t *  state,
int  is_signed 
)
inlinestatic

Definition at line 42 of file ffv1dec.c.

Referenced by decode_line_TMPL(), and get_symbol().

◆ get_symbol()

static av_noinline int get_symbol ( RangeCoder *  c,
uint8_t *  state,
int  is_signed 
)
static

Definition at line 66 of file ffv1dec.c.

Referenced by decode_header(), decode_q_branch(), decode_qlogs(), decode_slice_header(), read_extra_header(), read_header(), and read_quant_table().

◆ get_vlc_symbol()

static int get_vlc_symbol ( GetBitContext *  gb,
VlcState *const  state,
int  bits 
)
inlinestatic

Definition at line 71 of file ffv1dec.c.

Referenced by decode_line_TMPL().

◆ is_input_end()

static int is_input_end ( FFV1Context *  s)
static

Definition at line 96 of file ffv1dec.c.

Referenced by decode_line_TMPL().

◆ decode_plane()

static int decode_plane ( FFV1Context *  s,
uint8_t *  src,
int  w,
int  h,
int  stride,
int  plane_index,
int  pixel_stride 
)
static

Definition at line 119 of file ffv1dec.c.

Referenced by decode_slice().

◆ decode_slice_header()

static int decode_slice_header ( FFV1Context *  f,
FFV1Context *  fs 
)
static

Definition at line 167 of file ffv1dec.c.

Referenced by decode_slice().

◆ decode_slice()

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

Definition at line 246 of file ffv1dec.c.

Referenced by decode_frame(), and dxtory_decode_v2().

◆ read_quant_table()

static int read_quant_table ( RangeCoder *  c,
int16_t *  quant_table,
int  scale 
)
static

Definition at line 368 of file ffv1dec.c.

Referenced by read_quant_tables().

◆ read_quant_tables()

static int read_quant_tables ( RangeCoder *  c,
int16_t  quant_table[MAX_CONTEXT_INPUTS][256] 
)
static

Definition at line 395 of file ffv1dec.c.

Referenced by read_extra_header(), and read_header().

◆ read_extra_header()

static int read_extra_header ( FFV1Context *  f)
static

Definition at line 413 of file ffv1dec.c.

Referenced by decode_init().

◆ read_header()

static int read_header ( FFV1Context *  f)
static

Definition at line 530 of file ffv1dec.c.

Referenced by decode_frame(), and mjpegb_decode_frame().

◆ decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx)
static

Definition at line 818 of file ffv1dec.c.

◆ decode_frame()

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

Definition at line 837 of file ffv1dec.c.

◆ copy_fields()

static void copy_fields ( FFV1Context *  fsdst,
FFV1Context *  fssrc,
FFV1Context *  fsrc 
)
static

Definition at line 1015 of file ffv1dec.c.

Variable Documentation

◆ ff_ffv1_decoder

AVCodec ff_ffv1_decoder
Initial value:
= {
.name = "ffv1",
.long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_FFV1,
.priv_data_size = sizeof(FFV1Context),
.init = decode_init,
.close = ff_ffv1_close,
.decode = decode_frame,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
.update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
.capabilities = AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP
}

Definition at line 1089 of file ffv1dec.c.

init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
decode_frame
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ffv1dec.c:837
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1037
ONLY_IF_THREADS_ENABLED
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:227
update_thread_context
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 update_thread_context() run it in the next thread. If the codec allocates writable tables in its init()
AV_CODEC_ID_FFV1
@ AV_CODEC_ID_FFV1
Definition: avcodec.h:251
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
ff_ffv1_close
av_cold int ff_ffv1_close(AVCodecContext *avctx)
Definition: ffv1.c:210
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
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: ffv1dec.c:818
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
FFV1Context
Definition: ffv1.h:79
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