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Macros | Functions | Variables
avcodec.c File Reference

AVCodecContext functions for libavcodec. More...

#include <assert.h>
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/emms.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "avcodec_internal.h"
#include "bsf.h"
#include "codec_desc.h"
#include "codec_internal.h"
#include "decode.h"
#include "frame_thread_encoder.h"
#include "hwconfig.h"
#include "internal.h"
#include "libavutil/refstruct.h"

Go to the source code of this file.

Macros

#define  FF_MAX_EXTRADATA_SIZE   ((1 << 28) - AV_INPUT_BUFFER_PADDING_SIZE)
  Maximum size in bytes of extradata.
 
#define  WRAP_CONFIG(allowed_type, field, var, field_type, sentinel_check)
 

Functions

int  avcodec_default_execute (AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
 
int  avcodec_default_execute2 (AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2, int jobnr, int threadnr), void *arg, int *ret, int count)
 
static void  lock_avcodec (const FFCodec *codec)
 
static void  unlock_avcodec (const FFCodec *codec)
 
static int64_t  get_bit_rate (AVCodecContext *ctx)
 
int attribute_align_arg  avcodec_open2 (AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
  Initialize the AVCodecContext to use the given AVCodec.
 
void  avcodec_flush_buffers (AVCodecContext *avctx)
  Reset the internal codec state / flush internal buffers.
 
void  avsubtitle_free (AVSubtitle *sub)
  Free all allocated data in the given subtitle struct.
 
av_cold void  ff_codec_close (AVCodecContext *avctx)
 
static const char *  unknown_if_null (const char *str)
 
void  avcodec_string (char *buf, int buf_size, AVCodecContext *enc, int encode)
 
int  avcodec_is_open (AVCodecContext *s)
 
int attribute_align_arg  avcodec_receive_frame_flags (AVCodecContext *avctx, AVFrame *frame, unsigned flags)
  Return decoded output data from a decoder or encoder (when the AV_CODEC_FLAG_RECON_FRAME flag is used).
 
int  avcodec_receive_frame (AVCodecContext *avctx, AVFrame *frame)
  Alias for avcodec_receive_frame_flags(avctx, frame, 0).
 
int  ff_default_get_supported_config (const AVCodecContext *avctx, const AVCodec *codec, enum AVCodecConfig config, unsigned flags, const void **out_configs, int *out_num_configs)
 
int  avcodec_get_supported_config (const AVCodecContext *avctx, const AVCodec *codec, enum AVCodecConfig config, unsigned flags, const void **out, int *out_num)
  Retrieve a list of all supported values for a given configuration type.
 
int  av_packet_side_data_from_frame (AVPacketSideData **psd, int *pnb_sd, const AVFrameSideData *src, unsigned int flags)
 
int  av_packet_side_data_to_frame (AVFrameSideData ***psd, int *pnb_sd, const AVPacketSideData *src, unsigned int flags)
  Add a new frame side data entry to an array based on existing packet side data, if a matching type exists for frame side data.
 

Variables

const SideDataMap  ff_sd_global_map []
  A map between packet and frame side data types.
 
static AVMutex  codec_mutex = AV_MUTEX_INITIALIZER
 
static enum AVColorRange  color_range_tab []
 
static enum AVAlphaMode  alpha_mode_tab []
 
static const uint8_t  offset_tab []
 

Detailed Description

AVCodecContext functions for libavcodec.

Definition in file avcodec.c.

Macro Definition Documentation

◆  FF_MAX_EXTRADATA_SIZE

#define FF_MAX_EXTRADATA_SIZE   ((1 << 28) - AV_INPUT_BUFFER_PADDING_SIZE)

Maximum size in bytes of extradata.

This value was chosen such that every bit of the buffer is addressable by a 32-bit signed integer as used by get_bits.

Definition at line 55 of file avcodec.c.

Referenced by avcodec_open2().

◆  WRAP_CONFIG

#define WRAP_CONFIG ( allowed_type,
field,
var,
field_type,
sentinel_check )
Value:
do { \
if (codec->type != (allowed_type)) \
return AVERROR(EINVAL); \
const field_type *ptr = codec2->field; \
*out_configs = ptr; \
if (ptr) { \
for (int i = 0;; i++) { \
const field_type var = ptr[i]; \
if (sentinel_check) { \
*out_num_configs = i; \
break; \
} \
} \
} else \
*out_num_configs = 0; \
return 0; \
} while (0)
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
#define AVERROR(e)
Definition error.h:45

Definition at line 725 of file avcodec.c.

Referenced by ff_default_get_supported_config().

Function Documentation

◆  lock_avcodec()

static void lock_avcodec ( const FFCodec * codec )
static

Definition at line 102 of file avcodec.c.

Referenced by avcodec_open2().

◆  unlock_avcodec()

static void unlock_avcodec ( const FFCodec * codec )
static

Definition at line 108 of file avcodec.c.

Referenced by avcodec_open2().

◆  get_bit_rate()

static int64_t get_bit_rate ( AVCodecContext * ctx )
static

Definition at line 114 of file avcodec.c.

Referenced by avcodec_open2(), and avcodec_string().

◆  ff_codec_close()

av_cold void ff_codec_close ( AVCodecContext * avctx )

Definition at line 443 of file avcodec.c.

Referenced by avcodec_free_context(), and avcodec_open2().

◆  unknown_if_null()

static const char * unknown_if_null ( const char * str )
static

Definition at line 509 of file avcodec.c.

Referenced by avcodec_string().

◆  ff_default_get_supported_config()

int ff_default_get_supported_config ( const AVCodecContext * avctx,
const AVCodec * codec,
enum AVCodecConfig config,
unsigned flags,
const void ** out_configs,
int * out_num_configs )

Definition at line 765 of file avcodec.c.

Referenced by av1_get_supported_config(), avcodec_get_supported_config(), and libx265_get_supported_config().

◆  av_packet_side_data_from_frame()

int av_packet_side_data_from_frame ( AVPacketSideData ** psd,
int * pnb_sd,
const AVFrameSideData * src,
unsigned int flags )

Definition at line 837 of file avcodec.c.

Variable Documentation

◆  ff_sd_global_map

const SideDataMap ff_sd_global_map[]
Initial value:
= {
}
@ AV_PKT_DATA_AMBIENT_VIEWING_ENVIRONMENT
Ambient viewing environment metadata, as defined by H.274.
Definition packet.h:327
@ AV_PKT_DATA_3D_REFERENCE_DISPLAYS
This side data contains information about the reference display width(s) and reference viewing distan...
Definition packet.h:357
@ AV_PKT_DATA_ICC_PROFILE
ICC profile data consisting of an opaque octet buffer following the format described by ISO 15076-1.
Definition packet.h:271
@ AV_PKT_DATA_MASTERING_DISPLAY_METADATA
Mastering display metadata (based on SMPTE-2086:2014).
Definition packet.h:219
@ AV_PKT_DATA_AUDIO_SERVICE_TYPE
This side data should be associated with an audio stream and corresponds to enum AVAudioServiceType.
Definition packet.h:117
@ AV_PKT_DATA_SPHERICAL
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition packet.h:225
@ AV_PKT_DATA_DISPLAYMATRIX
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition packet.h:105
@ AV_PKT_DATA_EXIF
Extensible image file format metadata.
Definition packet.h:369
@ AV_PKT_DATA_NB
The number of side data types.
Definition packet.h:394
@ AV_PKT_DATA_STEREO3D
This side data should be associated with a video stream and contains Stereoscopic 3D information in f...
Definition packet.h:111
@ AV_PKT_DATA_CONTENT_LIGHT_LEVEL
Content light level (based on CTA-861.3).
Definition packet.h:232
@ AV_PKT_DATA_REPLAYGAIN
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition packet.h:96
@ AV_FRAME_DATA_EXIF
Exchangeable image file format metadata.
Definition frame.h:263
@ AV_FRAME_DATA_SPHERICAL
The data represents the AVSphericalMapping structure defined in libavutil/spherical....
Definition frame.h:131
@ AV_FRAME_DATA_CONTENT_LIGHT_LEVEL
Content light level (based on CTA-861.3).
Definition frame.h:137
@ AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT
Ambient viewing environment metadata, as defined by H.274.
Definition frame.h:220
@ AV_FRAME_DATA_DISPLAYMATRIX
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition frame.h:85
@ AV_FRAME_DATA_AUDIO_SERVICE_TYPE
This side data must be associated with an audio frame and corresponds to enum AVAudioServiceType defi...
Definition frame.h:114
@ AV_FRAME_DATA_REPLAYGAIN
ReplayGain information in the form of the AVReplayGain struct.
Definition frame.h:77
@ AV_FRAME_DATA_MASTERING_DISPLAY_METADATA
Mastering display metadata associated with a video frame.
Definition frame.h:120
@ AV_FRAME_DATA_3D_REFERENCE_DISPLAYS
This side data contains information about the reference display width(s) and reference viewing distan...
Definition frame.h:256
@ AV_FRAME_DATA_ICC_PROFILE
The data contains an ICC profile as an opaque octet buffer following the format described by ISO 1507...
Definition frame.h:144
@ AV_FRAME_DATA_STEREO3D
Stereoscopic 3d metadata.
Definition frame.h:64

A map between packet and frame side data types.

Terminated with an entry where packet=AV_PKT_DATA_NB.

Definition at line 57 of file avcodec.c.

Referenced by av_packet_side_data_from_frame(), av_packet_side_data_to_frame(), ff_decode_frame_props(), ff_decode_frame_props_from_pkt(), ff_decode_preinit(), and ff_encode_preinit().

◆  codec_mutex

AVMutex codec_mutex = AV_MUTEX_INITIALIZER
static

Definition at line 100 of file avcodec.c.

Referenced by lock_avcodec(), and unlock_avcodec().

◆  color_range_tab

enum AVColorRange color_range_tab[]
static
Initial value:
= {
}
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition pixfmt.h:766
@ AVCOL_RANGE_UNSPECIFIED
Definition pixfmt.h:749
@ AVCOL_RANGE_JPEG
Full range content.
Definition pixfmt.h:783

Definition at line 744 of file avcodec.c.

Referenced by ff_default_get_supported_config().

◆  alpha_mode_tab

enum AVAlphaMode alpha_mode_tab[]
static
Initial value:
= {
}
@ AVALPHA_MODE_STRAIGHT
Alpha channel is independent of color values.
Definition pixfmt.h:819
@ AVALPHA_MODE_UNSPECIFIED
Unknown alpha handling, or no alpha channel.
Definition pixfmt.h:817
@ AVALPHA_MODE_PREMULTIPLIED
Alpha channel is multiplied into color values.
Definition pixfmt.h:818

Definition at line 749 of file avcodec.c.

Referenced by ff_default_get_supported_config().

◆  offset_tab

const uint8_t offset_tab[]
static
Initial value:

Definition at line 759 of file avcodec.c.

Referenced by ff_default_get_supported_config().

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