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)

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_REPLAYGAIN ,                AV_FRAME_DATA_REPLAYGAIN },
    { AV_PKT_DATA_DISPLAYMATRIX,              AV_FRAME_DATA_DISPLAYMATRIX },
    { AV_PKT_DATA_SPHERICAL,                  AV_FRAME_DATA_SPHERICAL },
    { AV_PKT_DATA_STEREO3D,                   AV_FRAME_DATA_STEREO3D },
    { AV_PKT_DATA_AUDIO_SERVICE_TYPE,         AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
    { AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA },
    { AV_PKT_DATA_CONTENT_LIGHT_LEVEL,        AV_FRAME_DATA_CONTENT_LIGHT_LEVEL },
    { AV_PKT_DATA_ICC_PROFILE,                AV_FRAME_DATA_ICC_PROFILE },
    { AV_PKT_DATA_AMBIENT_VIEWING_ENVIRONMENT,AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT },
    { AV_PKT_DATA_3D_REFERENCE_DISPLAYS,      AV_FRAME_DATA_3D_REFERENCE_DISPLAYS },
    { AV_PKT_DATA_EXIF,                       AV_FRAME_DATA_EXIF },
    { AV_PKT_DATA_NB },
}

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, AVCOL_RANGE_JPEG, AVCOL_RANGE_UNSPECIFIED,
    AVCOL_RANGE_MPEG, AVCOL_RANGE_UNSPECIFIED,
}

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_PREMULTIPLIED, AVALPHA_MODE_STRAIGHT, AVALPHA_MODE_UNSPECIFIED,
    AVALPHA_MODE_PREMULTIPLIED, AVALPHA_MODE_UNSPECIFIED
}

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:

= {
    [AVCOL_RANGE_MPEG] = 3,
    [AVCOL_RANGE_JPEG] = 1,
    [AVCOL_RANGE_MPEG | AVCOL_RANGE_JPEG] = 0,
}

Definition at line 759 of file avcodec.c.

Referenced by ff_default_get_supported_config().