utils. More...

#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/crc.h"
#include "libavutil/frame.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/dict.h"
#include "avcodec.h"
#include "dsputil.h"
#include "libavutil/opt.h"
#include "thread.h"
#include "frame_thread_encoder.h"
#include "internal.h"
#include "bytestream.h"
#include "version.h"
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <float.h>

Include dependency graph for libavcodec/utils.c:

Go to the source code of this file.

Data Structures
struct	CompatReleaseBufPriv

Macros
#define	STRIDE_ALIGN 8

#define	WRAP_PLANE(ref_out, data, data_size)

#define	MAKE_ACCESSORS(str, name, type, field)

#define	UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */

#define	TAG_PRINT(x)

#define	LICENSE_PREFIX "libavcodec license: "

Typedefs
typedef struct CompatReleaseBufPriv	CompatReleaseBufPriv

Functions
void *	av_fast_realloc (void ptr, unsigned int size, size_t min_size)
	Reallocate the given block if it is not large enough, otherwise do nothing. More...

static int	ff_fast_malloc (void ptr, unsigned int size, size_t min_size, int zero_realloc)

void	av_fast_malloc (void ptr, unsigned int size, size_t min_size)
	Allocate a buffer, reusing the given one if large enough. More...

void	av_fast_padded_malloc (void ptr, unsigned int size, size_t min_size)
	Same behaviour av_fast_malloc but the buffer has additional FF_INPUT_BUFFER_PADDING_SIZE at the end which will will always be 0. More...

void	av_fast_padded_mallocz (void ptr, unsigned int size, size_t min_size)
	Same behaviour av_fast_padded_malloc except that buffer will always be 0-initialized after call. More...

AVCodec *	av_codec_next (const AVCodec *c)
	If c is NULL, returns the first registered codec, if c is non-NULL, returns the next registered codec after c, or NULL if c is the last one. More...

static void	avcodec_init (void)

int	av_codec_is_encoder (const AVCodec *codec)

int	av_codec_is_decoder (const AVCodec *codec)

void	avcodec_register (AVCodec *codec)
	Register the codec codec and initialize libavcodec. More...

unsigned	avcodec_get_edge_width (void)
	Return the amount of padding in pixels which the get_buffer callback must provide around the edge of the image for codecs which do not have the CODEC_FLAG_EMU_EDGE flag. More...

void	avcodec_set_dimensions (AVCodecContext *s, int width, int height)

void	avcodec_align_dimensions2 (AVCodecContext s, int width, int *height, int linesize_align[AV_NUM_DATA_POINTERS])
	Modify width and height values so that they will result in a memory buffer that is acceptable for the codec if you also ensure that all line sizes are a multiple of the respective linesize_align[i]. More...

void	avcodec_align_dimensions (AVCodecContext s, int width, int *height)
	Modify width and height values so that they will result in a memory buffer that is acceptable for the codec if you do not use any horizontal padding. More...

int	avcodec_fill_audio_frame (AVFrame frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t buf, int buf_size, int align)
	Fill AVFrame audio data and linesize pointers. More...

static int	update_frame_pool (AVCodecContext avctx, AVFrame frame)

static int	audio_get_buffer (AVCodecContext avctx, AVFrame frame)

static int	video_get_buffer (AVCodecContext s, AVFrame pic)

void	avpriv_color_frame (AVFrame *frame, const int c[4])

int	avcodec_default_get_buffer2 (AVCodecContext avctx, AVFrame frame, int flags)
	The default callback for AVCodecContext.get_buffer2(). More...

int	ff_init_buffer_info (AVCodecContext avctx, AVFrame frame)
	does needed setup of pkt_pts/pos and such for (re)get_buffer(); More...

int	avcodec_default_get_buffer (AVCodecContext avctx, AVFrame frame)

static void	compat_free_buffer (void opaque, uint8_t data)

static void	compat_release_buffer (void opaque, uint8_t data)

static int	get_buffer_internal (AVCodecContext avctx, AVFrame frame, int flags)

int	ff_get_buffer (AVCodecContext avctx, AVFrame frame, int flags)
	Get a buffer for a frame. More...

static int	reget_buffer_internal (AVCodecContext avctx, AVFrame frame)

int	ff_reget_buffer (AVCodecContext avctx, AVFrame frame)
	Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buffer when needed. More...

void	avcodec_default_release_buffer (AVCodecContext s, AVFrame pic)

int	avcodec_default_reget_buffer (AVCodecContext s, AVFrame pic)

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 int	is_hwaccel_pix_fmt (enum AVPixelFormat pix_fmt)

enum AVPixelFormat	avcodec_default_get_format (struct AVCodecContext s, const enum AVPixelFormat fmt)

void	avcodec_get_frame_defaults (AVFrame *frame)
	Set the fields of the given AVFrame to default values. More...

AVFrame *	avcodec_alloc_frame (void)
	Allocate an AVFrame and set its fields to default values. More...

void	avcodec_free_frame (AVFrame **frame)
	Free the frame and any dynamically allocated objects in it, e.g. More...

static void	avcodec_get_subtitle_defaults (AVSubtitle *sub)

static int	get_bit_rate (AVCodecContext *ctx)

int attribute_align_arg	ff_codec_open2_recursive (AVCodecContext avctx, const AVCodec codec, AVDictionary **options)
	Call avcodec_open2 recursively by decrementing counter, unlocking mutex, calling the function and then restoring again. More...

int attribute_align_arg	avcodec_open2 (AVCodecContext avctx, const AVCodec codec, AVDictionary **options)
	Initialize the AVCodecContext to use the given AVCodec. More...

int	ff_alloc_packet2 (AVCodecContext avctx, AVPacket avpkt, int size)
	Check AVPacket size and/or allocate data. More...

int	ff_alloc_packet (AVPacket *avpkt, int size)

static int	pad_last_frame (AVCodecContext s, AVFrame dst, const AVFrame src)
	Pad last frame with silence. More...

int attribute_align_arg	avcodec_encode_audio2 (AVCodecContext avctx, AVPacket avpkt, const AVFrame frame, int got_packet_ptr)
	Encode a frame of audio. More...

int attribute_align_arg	avcodec_encode_audio (AVCodecContext avctx, uint8_t buf, int buf_size, const short *samples)

int attribute_align_arg	avcodec_encode_video (AVCodecContext avctx, uint8_t buf, int buf_size, const AVFrame *pict)

int attribute_align_arg	avcodec_encode_video2 (AVCodecContext avctx, AVPacket avpkt, const AVFrame frame, int got_packet_ptr)
	Encode a frame of video. More...

int	avcodec_encode_subtitle (AVCodecContext avctx, uint8_t buf, int buf_size, const AVSubtitle *sub)

static int64_t	guess_correct_pts (AVCodecContext *ctx, int64_t reordered_pts, int64_t dts)
	Attempt to guess proper monotonic timestamps for decoded video frames which might have incorrect times. More...

static void	apply_param_change (AVCodecContext avctx, AVPacket avpkt)

static int	add_metadata_from_side_data (AVCodecContext avctx, AVFrame frame)

int attribute_align_arg	avcodec_decode_video2 (AVCodecContext avctx, AVFrame picture, int got_picture_ptr, const AVPacket avpkt)
	Decode the video frame of size avpkt->size from avpkt->data into picture. More...

int attribute_align_arg	avcodec_decode_audio3 (AVCodecContext avctx, int16_t samples, int frame_size_ptr, AVPacket avpkt)

int attribute_align_arg	avcodec_decode_audio4 (AVCodecContext avctx, AVFrame frame, int got_frame_ptr, const AVPacket avpkt)
	Decode the audio frame of size avpkt->size from avpkt->data into frame. More...

static int	recode_subtitle (AVCodecContext avctx, AVPacket outpkt, const AVPacket *inpkt)

int	avcodec_decode_subtitle2 (AVCodecContext avctx, AVSubtitle sub, int got_sub_ptr, AVPacket avpkt)
	Decode a subtitle message. More...

void	avsubtitle_free (AVSubtitle *sub)
	Free all allocated data in the given subtitle struct. More...

av_cold int	ff_codec_close_recursive (AVCodecContext *avctx)
	Call avcodec_close recursively, counterpart to avcodec_open2_recursive. More...

av_cold int	avcodec_close (AVCodecContext *avctx)
	Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext itself). More...

static enum AVCodecID	remap_deprecated_codec_id (enum AVCodecID id)

static AVCodec *	find_encdec (enum AVCodecID id, int encoder)

AVCodec *	avcodec_find_encoder (enum AVCodecID id)
	Find a registered encoder with a matching codec ID. More...

AVCodec *	avcodec_find_encoder_by_name (const char *name)
	Find a registered encoder with the specified name. More...

AVCodec *	avcodec_find_decoder (enum AVCodecID id)
	Find a registered decoder with a matching codec ID. More...

AVCodec *	avcodec_find_decoder_by_name (const char *name)
	Find a registered decoder with the specified name. More...

const char *	avcodec_get_name (enum AVCodecID id)
	Get the name of a codec. More...

size_t	av_get_codec_tag_string (char *buf, size_t buf_size, unsigned int codec_tag)
	Put a string representing the codec tag codec_tag in buf. More...

void	avcodec_string (char buf, int buf_size, AVCodecContext enc, int encode)

const char *	av_get_profile_name (const AVCodec *codec, int profile)
	Return a name for the specified profile, if available. More...

unsigned	avcodec_version (void)
	Return the LIBAVCODEC_VERSION_INT constant. More...

const char *	avcodec_configuration (void)
	Return the libavcodec build-time configuration. More...

const char *	avcodec_license (void)
	Return the libavcodec license. More...

void	avcodec_flush_buffers (AVCodecContext *avctx)
	Flush buffers, should be called when seeking or when switching to a different stream. More...

int	av_get_exact_bits_per_sample (enum AVCodecID codec_id)
	Return codec bits per sample. More...

enum AVCodecID	av_get_pcm_codec (enum AVSampleFormat fmt, int be)
	Return the PCM codec associated with a sample format. More...

int	av_get_bits_per_sample (enum AVCodecID codec_id)
	Return codec bits per sample. More...

int	av_get_audio_frame_duration (AVCodecContext *avctx, int frame_bytes)
	Return audio frame duration. More...

int	ff_thread_init (AVCodecContext *s)

unsigned int	av_xiphlacing (unsigned char *s, unsigned int v)
	Encode extradata length to a buffer. More...

int	ff_match_2uint16 (const uint16_t(*tab)[2], int size, int a, int b)
	Return the index into tab at which {a,b} match elements {[0],[1]} of tab. More...

void	av_log_missing_feature (void avc, const char feature, int want_sample)

void	av_log_ask_for_sample (void avc, const char msg,...)

void	av_register_hwaccel (AVHWAccel *hwaccel)
	Register the hardware accelerator hwaccel. More...

AVHWAccel *	av_hwaccel_next (AVHWAccel *hwaccel)
	If hwaccel is NULL, returns the first registered hardware accelerator, if hwaccel is non-NULL, returns the next registered hardware accelerator after hwaccel, or NULL if hwaccel is the last one. More...

AVHWAccel *	ff_find_hwaccel (enum AVCodecID codec_id, enum AVPixelFormat pix_fmt)
	Return the hardware accelerated codec for codec codec_id and pixel format pix_fmt. More...

int	av_lockmgr_register (int(cb)(void *mutex, enum AVLockOp op))
	Register a user provided lock manager supporting the operations specified by AVLockOp. More...

int	ff_lock_avcodec (AVCodecContext *log_ctx)

int	ff_unlock_avcodec (void)

int	avpriv_lock_avformat (void)

int	avpriv_unlock_avformat (void)

unsigned int	avpriv_toupper4 (unsigned int x)

int	ff_thread_ref_frame (ThreadFrame dst, ThreadFrame src)

enum AVPixelFormat	ff_thread_get_format (AVCodecContext avctx, const enum AVPixelFormat fmt)
	Wrapper around get_format() for frame-multithreaded codecs. More...

int	ff_thread_get_buffer (AVCodecContext avctx, ThreadFrame f, int flags)
	Wrapper around get_buffer() for frame-multithreaded codecs. More...

void	ff_thread_release_buffer (AVCodecContext avctx, ThreadFrame f)
	Wrapper around release_buffer() frame-for multithreaded codecs. More...

void	ff_thread_finish_setup (AVCodecContext *avctx)
	If the codec defines update_thread_context(), call this when they are ready for the next thread to start decoding the next frame. More...

void	ff_thread_report_progress (ThreadFrame *f, int progress, int field)
	Notify later decoding threads when part of their reference picture is ready. More...

void	ff_thread_await_progress (ThreadFrame *f, int progress, int field)
	Wait for earlier decoding threads to finish reference pictures. More...

int	ff_thread_can_start_frame (AVCodecContext *avctx)

enum AVMediaType	avcodec_get_type (enum AVCodecID codec_id)
	Get the type of the given codec. More...

int	avcodec_is_open (AVCodecContext *s)

int	avpriv_bprint_to_extradata (AVCodecContext avctx, struct AVBPrint buf)
	Finalize buf into extradata and set its size appropriately. More...

const uint8_t *	avpriv_find_start_code (const uint8_t av_restrict p, const uint8_t end, uint32_t *av_restrict state)

Variables
volatile int	ff_avcodec_locked

static int volatile	entangled_thread_counter = 0

static int(*	ff_lockmgr_cb )(void **mutex, enum AVLockOp op)

static void *	codec_mutex

static void *	avformat_mutex

static AVCodec *	first_avcodec = NULL

static AVHWAccel *	first_hwaccel = NULL

Detailed Description

utils.

Definition in file libavcodec/utils.c.

Macro Definition Documentation

#define LICENSE_PREFIX "libavcodec license: "

Referenced by avcodec_license().

#define MAKE_ACCESSORS	(	str,
		name,
		type,
		field
	)

Value:

type av_##name##_get_##field(const str *s) { return s->field; } \

void av_##name##_set_##field(str *s, type v) { s->field = v; }

name

const char * name

Definition: avisynth_c.h:675

v

float v

Definition: avf_showspectrum.c:88

s

const char * s

Definition: avisynth_c.h:668

void

typedef void(RENAME(mix_any_func_type))

Definition: rematrix_template.c:41

type

#define type

Definition at line 979 of file libavcodec/utils.c.

#define STRIDE_ALIGN 8

Definition at line 188 of file libavcodec/utils.c.

Referenced by avcodec_align_dimensions2().

#define TAG_PRINT ( x )

Value:

(((x) >= '0' && (x) <= '9') ||                                \
     ((x) >= 'a' && (x) <= 'z') || ((x) >= 'A' && (x) <= 'Z') ||  \
     ((x) == '.' || (x) == ' ' || (x) == '-' || (x) == '_'))

Referenced by av_get_codec_tag_string().

#define UTF8_MAX_BYTES 4 /* 5 and 6 bytes sequences should not be used */

Definition at line 2151 of file libavcodec/utils.c.

Referenced by recode_subtitle().

#define WRAP_PLANE	(	ref_out,
		data,
		data_size
	)

Value:

do {                                                                    \
    AVBufferRef *dummy_ref = av_buffer_ref(dummy_buf);                  \
    if (!dummy_ref) {                                                   \
        ret = AVERROR(ENOMEM);                                          \
        goto fail;                                                      \
    }                                                                   \
    ref_out = av_buffer_create(data, data_size, compat_release_buffer,  \
                               dummy_ref, 0);                           \
    if (!ref_out) {                                                     \
        av_frame_unref(frame);                                          \
        ret = AVERROR(ENOMEM);                                          \
        goto fail;                                                      \
    }                                                                   \
} while (0)

Referenced by av_buffersrc_add_frame_internal(), and get_buffer_internal().

Typedef Documentation

typedef struct CompatReleaseBufPriv CompatReleaseBufPriv

Function Documentation

static int add_metadata_from_side_data	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 1878 of file libavcodec/utils.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

static void apply_param_change	(	AVCodecContext *	avctx,
		AVPacket *	avpkt
	)

static

Definition at line 1836 of file libavcodec/utils.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

static int audio_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

static

Definition at line 466 of file libavcodec/utils.c.

Referenced by avcodec_default_get_buffer2().

void av_log_ask_for_sample	(	void *	avc,
		const char *	msg,
			...
	)

Definition at line 2907 of file libavcodec/utils.c.

Referenced by av_log_missing_feature().

void av_log_missing_feature	(	void *	avc,
		const char *	feature,
		int	want_sample
	)

Definition at line 2897 of file libavcodec/utils.c.

int attribute_align_arg avcodec_decode_audio3	(	AVCodecContext *	avctx,
		int16_t *	samples,
		int *	frame_size_ptr,
		AVPacket *	avpkt
	)

Definition at line 1985 of file libavcodec/utils.c.

int avcodec_default_execute2	(	AVCodecContext *	c,
		int()(AVCodecContext c2, void *arg2, int jobnr, int threadnr)	func,
		void *	arg,
		int *	ret,
		int	count
	)

Definition at line 902 of file libavcodec/utils.c.

int avcodec_default_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

Definition at line 661 of file libavcodec/utils.c.

Referenced by avcodec_decode_audio3().

int avcodec_default_reget_buffer	(	AVCodecContext *	s,
		AVFrame *	pic
	)

Definition at line 884 of file libavcodec/utils.c.

void avcodec_default_release_buffer	(	AVCodecContext *	s,
		AVFrame *	pic
	)

Definition at line 877 of file libavcodec/utils.c.

Referenced by avcodec_decode_audio3().

int attribute_align_arg avcodec_encode_audio	(	AVCodecContext *	avctx,
		uint8_t *	buf,
		int	buf_size,
		const short *	samples
	)

Definition at line 1600 of file libavcodec/utils.c.

int attribute_align_arg avcodec_encode_video	(	AVCodecContext *	avctx,
		uint8_t *	buf,
		int	buf_size,
		const AVFrame *	pict
	)

Definition at line 1678 of file libavcodec/utils.c.

Referenced by filter(), and wrap().

static void avcodec_get_subtitle_defaults ( AVSubtitle * sub )

static

Definition at line 986 of file libavcodec/utils.c.

Referenced by avcodec_decode_subtitle2().

static void avcodec_init ( void )

static

Definition at line 136 of file libavcodec/utils.c.

Referenced by avcodec_register().

int avpriv_bprint_to_extradata	(	AVCodecContext *	avctx,
		struct AVBPrint *	buf
	)

Finalize buf into extradata and set its size appropriately.

Definition at line 3107 of file libavcodec/utils.c.

Referenced by ass_read_header(), dvdsub_init(), ff_samples_to_time_base(), jacosub_read_header(), sami_read_header(), and subviewer_read_header().

void avpriv_color_frame	(	AVFrame *	frame,
		const int	c[4]
	)

Definition at line 564 of file libavcodec/utils.c.

Referenced by h264_frame_start().

const uint8_t* avpriv_find_start_code	(	const uint8_t *av_restrict	p,
		const uint8_t *	end,
		uint32_t *av_restrict	state
	)

Definition at line 3125 of file libavcodec/utils.c.

int avpriv_lock_avformat ( void )

Definition at line 3000 of file libavcodec/utils.c.

Referenced by avisynth_read_close(), avisynth_read_header(), ff_tls_deinit(), and ff_tls_init().

unsigned int avpriv_toupper4 ( unsigned int x )

Definition at line 3018 of file libavcodec/utils.c.

Referenced by ff_codec_get_id(), ff_MPV_common_init(), mpeg_decode_frame(), and validate_codec_tag().

int avpriv_unlock_avformat ( void )

Definition at line 3009 of file libavcodec/utils.c.

Referenced by avisynth_read_close(), avisynth_read_header(), ff_tls_deinit(), and ff_tls_init().

static void compat_free_buffer	(	void *	opaque,
		uint8_t *	data
	)

static

Definition at line 671 of file libavcodec/utils.c.

Referenced by av_buffersink_set_frame_size(), av_buffersrc_add_frame_internal(), and get_buffer_internal().

static void compat_release_buffer	(	void *	opaque,
		uint8_t *	data
	)

static

Definition at line 679 of file libavcodec/utils.c.

int ff_alloc_packet	(	AVPacket *	avpkt,
		int	size
	)

Definition at line 1420 of file libavcodec/utils.c.

Referenced by cng_encode_frame().

int ff_alloc_packet2	(	AVCodecContext *	avctx,
		AVPacket *	avpkt,
		int	size
	)

Check AVPacket size and/or allocate data.

Encoders supporting AVCodec.encode2() can use this as a convenience to ensure the output packet data is large enough, whether provided by the user or allocated in this function.

Parameters

avctx	the AVCodecContext of the encoder
avpkt	the AVPacket If avpkt->data is already set, avpkt->size is checked to ensure it is large enough. If avpkt->data is NULL, a new buffer is allocated. avpkt->size is set to the specified size. All other AVPacket fields will be reset with av_init_packet().
size	the minimum required packet size

Returns: 0 on success, negative error code on failure

Definition at line 1377 of file libavcodec/utils.c.

Referenced by a64multi_encode_frame(), aac_encode_frame(), aacPlus_encode_frame(), adpcm_encode_frame(), adx_encode_frame(), alac_encode_frame(), amr_decode_fix_avctx(), amr_wb_encode_frame(), avui_encode_frame(), bmp_encode_frame(), dnxhd_encode_picture(), dv_write_pack(), encode_frame(), encode_nals(), encode_picture_lossless(), encode_picture_ls(), encode_superframe(), Faac_encode_frame(), ff_alloc_packet(), ff_MPV_encode_picture(), flac_encode_frame(), flashsv2_encode_frame(), flashsv_encode_frame(), g722_encode_frame(), g726_reset(), gif_encode_frame(), ilbc_encode_frame(), libgsm_encode_frame(), libopenjpeg_encode_frame(), libopus_encode(), libschroedinger_encode_frame(), libshine_encode_frame(), mp3lame_encode_frame(), MPA_encode_frame(), oggvorbis_encode_frame(), pam_encode_frame(), pcm_encode_frame(), pcx_encode_frame(), pnm_encode_frame(), predictor_calc_error(), prores_encode_frame(), qtrle_encode_frame(), ra144_encode_frame(), raw_encode(), roq_dpcm_encode_frame(), roq_encode_frame(), storeframe(), sunrast_encode_frame(), svq1_encode_frame(), targa_encode_frame(), twolame_encode_frame(), utvideo_encode_frame(), v308_encode_frame(), v408_encode_frame(), v410_encode_frame(), vorbis_encode_frame(), XAVS_frame(), xbm_encode_frame(), xface_encode_frame(), xvid_encode_frame(), xwd_encode_frame(), y41p_encode_frame(), and yuv4_encode_frame().

av_cold int ff_codec_close_recursive ( AVCodecContext * avctx )

Call avcodec_close recursively, counterpart to avcodec_open2_recursive.

Definition at line 2293 of file libavcodec/utils.c.

Referenced by ff_samples_to_time_base().

int attribute_align_arg ff_codec_open2_recursive	(	AVCodecContext *	avctx,
		const AVCodec *	codec,
		AVDictionary **	options
	)

Call avcodec_open2 recursively by decrementing counter, unlocking mutex, calling the function and then restoring again.

Assumes the mutex is already locked

Definition at line 1022 of file libavcodec/utils.c.

Referenced by ff_samples_to_time_base().

static int ff_fast_malloc	(	void *	ptr,
		unsigned int *	size,
		size_t	min_size,
		int	zero_realloc
	)

inlinestatic

Definition at line 82 of file libavcodec/utils.c.

Referenced by av_fast_malloc(), av_fast_padded_malloc(), and av_fast_padded_mallocz().

AVHWAccel* ff_find_hwaccel	(	enum AVCodecID	codec_id,
		enum AVPixelFormat	pix_fmt
	)

Return the hardware accelerated codec for codec codec_id and pixel format pix_fmt.

Parameters

codec_id	the codec to match
pix_fmt	the pixel format to match

Returns: the hardware accelerated codec, or NULL if none was found.

Definition at line 2939 of file libavcodec/utils.c.

Referenced by ff_h263_decode_init(), h264_slice_header_init(), setup_hwaccel_for_pixfmt(), and vc1_decode_init().

int ff_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame,
		int	flags
	)

Get a buffer for a frame.

This is a wrapper around AVCodecContext.get_buffer() and should be used instead calling get_buffer() directly.

Definition at line 823 of file libavcodec/utils.c.

Referenced by ac3_decode_frame(), adpcm_decode_frame(), adx_decode_frame(), amr_decode_fix_avctx(), amrnb_decode_frame(), amrwb_decode_frame(), ape_decode_frame(), atrac1_decode_frame(), atrac3_decode_frame(), aura_decode_frame(), avui_decode_frame(), bfi_decode_frame(), bmp_decode_frame(), bmv_aud_decode_frame(), brpix_decode_frame(), cdg_decode_frame(), cdxl_decode_frame(), cinaudio_decode_frame(), cllc_decode_frame(), cmv_decode_frame(), cng_decode_frame(), cook_decode_frame(), copy_frame(), copy_output(), cyuv_decode_frame(), dca_decode_frame(), decode_element(), decode_frame(), decode_pic(), decode_tag(), decode_thread(), dfa_decode_frame(), dirac_decode_data_unit(), dirac_decode_picture_header(), dpcm_decode_frame(), dvvideo_decode_frame(), eightsvx_decode_frame(), encode_init(), escape124_decode_frame(), escape130_decode_frame(), evrc_decode_frame(), execute_code(), ff_ivi_decode_frame(), ff_mjpeg_decode_sof(), ff_samples_to_time_base(), ff_snow_common_init_after_header(), ff_snow_frame_start(), ff_thread_get_buffer(), ff_thread_video_encode_frame(), ff_vc1_decode_blocks(), ff_vp56_decode_frame(), flac_decode_frame(), flush(), frame_configure_elements(), g722_decode_frame(), g723_1_decode_frame(), g726_reset(), get_buffer(), get_siz(), gif_decode_frame(), gsm_decode_frame(), idcin_decode_frame(), ilbc_decode_frame(), imc_decode_frame(), init_image(), ipvideo_decode_frame(), libcelt_dec_decode(), libgsm_decode_frame(), libopus_decode(), libschroedinger_decode_frame(), libspeex_decode_frame(), mace_decode_frame(), mp_decode_frame(), mpc7_decode_frame(), mpc8_decode_frame(), mss2_decode_frame(), mxpeg_decode_frame(), oggvorbis_decode_frame(), output_data(), paf_aud_decode(), pcm_bluray_decode_frame(), pcm_decode_frame(), pcx_decode_frame(), pnm_decode_frame(), predictor_calc_error(), ptx_decode_frame(), qcelp_decode_frame(), qdm2_decode_frame(), ra144_decode_frame(), ra288_decode_frame(), reget_buffer_internal(), rl2_decode_frame(), roq_encode_frame(), s302m_decode_frame(), shorten_decode_frame(), sipr_decode_frame(), smka_decode_frame(), submit_packet(), sunrast_decode_frame(), svq1_decode_frame(), svq1_encode_frame(), synth_superframe(), tak_decode_frame(), tgq_decode_frame(), tgv_decode_frame(), thread_get_buffer_internal(), tmv_decode_frame(), tqi_decode_frame(), truespeech_decode_frame(), tta_decode_frame(), twin_decode_frame(), txd_decode_frame(), v308_decode_frame(), v408_decode_frame(), v410_decode_frame(), vble_decode_frame(), vcr1_decode_frame(), vmdaudio_decode_frame(), vmdvideo_decode_frame(), vorbis_decode_frame(), vp8_decode(), vqa_decode_frame(), wavesynth_decode(), wavpack_decode_frame(), wma_decode_superframe(), ws_snd_decode_frame(), xan_decode_frame(), xbm_decode_frame(), xface_decode_frame(), xwd_decode_frame(), y216_decode_frame(), y41p_decode_frame(), yuv4_decode_frame(), zero12v_decode_frame(), and zerocodec_decode_frame().

int ff_init_buffer_info	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

does needed setup of pkt_pts/pos and such for (re)get_buffer();

Definition at line 607 of file libavcodec/utils.c.

Referenced by get_buffer_internal(), reget_buffer_internal(), and thread_get_buffer_internal().

int ff_lock_avcodec ( AVCodecContext * log_ctx )

Definition at line 2970 of file libavcodec/utils.c.

Referenced by avcodec_close(), avcodec_open2(), ff_codec_close_recursive(), and ff_codec_open2_recursive().

int ff_match_2uint16	(	const uint16_t(*)	tab[2],
		int	size,
		int	a,
		int	b
	)

Return the index into tab at which {a,b} match elements {[0],[1]} of tab.

If there is no such matching pair then size is returned.

Definition at line 2889 of file libavcodec/utils.c.

Referenced by ff_h263_encode_picture_header(), ff_MPV_encode_init(), and svq1_write_header().

int ff_reget_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buffer when needed.

Definition at line 868 of file libavcodec/utils.c.

Referenced by aasc_decode_frame(), avs_decode_frame(), bethsoftvid_decode_frame(), cdg_decode_frame(), cinepak_decode_frame(), cinvideo_decode_frame(), cpia_decode_frame(), decode_frame(), ff_samples_to_time_base(), flashsv_decode_frame(), flic_decode_frame_15_16BPP(), flic_decode_frame_8BPP(), gif_decode_frame(), ir2_decode_frame(), mm_decode_frame(), mp_decode_frame(), msrle_decode_frame(), mss1_decode_frame(), mss2_decode_frame(), mss3_decode_frame(), mss4_decode_frame(), msvideo1_decode_frame(), mvc_decode_frame(), paf_vid_decode(), qtrle_decode_frame(), roq_decode_frame(), rpza_decode_frame(), seqvideo_decode_frame(), sgirle_decode_frame(), smc_decode_frame(), truemotion1_decode_frame(), tscc2_decode_frame(), ulti_decode_frame(), xan_decode_frame(), and yop_decode_frame().

void ff_thread_await_progress	(	ThreadFrame *	f,
		int	progress,
		int	field
	)

Wait for earlier decoding threads to finish reference pictures.

Call this before accessing some part of a picture, with a given value for progress, and it will return after the responsible decoding thread calls ff_thread_report_progress() with the same or higher value for progress.

Parameters

f	The picture being referenced.
progress	Value, in arbitrary units, to wait for.
field	The field being referenced, for field-picture codecs. 0 for top field or frame pictures, 1 for bottom field.

Definition at line 3071 of file libavcodec/utils.c.

int ff_thread_can_start_frame ( AVCodecContext * avctx )

Definition at line 3075 of file libavcodec/utils.c.

Referenced by ff_MPV_frame_start(), ff_samples_to_time_base(), and h264_frame_start().

void ff_thread_finish_setup ( AVCodecContext * avctx )

If the codec defines update_thread_context(), call this when they are ready for the next thread to start decoding the next frame.

After calling it, do not change any variables read by the update_thread_context() method, or call ff_thread_get_buffer().

Parameters

avctx The context.

Definition at line 3063 of file libavcodec/utils.c.

int ff_thread_get_buffer	(	AVCodecContext *	avctx,
		ThreadFrame *	f,
		int	flags
	)

Wrapper around get_buffer() for frame-multithreaded codecs.

Call this function instead of ff_get_buffer(f). Cannot be called after the codec has called ff_thread_finish_setup().

Parameters

avctx	The current context.
f	The frame to write into.

Definition at line 3052 of file libavcodec/utils.c.

enum AVPixelFormat ff_thread_get_format	(	AVCodecContext *	avctx,
		const enum AVPixelFormat *	fmt
	)

Wrapper around get_format() for frame-multithreaded codecs.

Call this function instead of avctx->get_format(). Cannot be called after the codec has called ff_thread_finish_setup().

Parameters

avctx	The current context.
fmt	The list of available formats.

Definition at line 3047 of file libavcodec/utils.c.

int ff_thread_init ( AVCodecContext * s )

Definition at line 2868 of file libavcodec/utils.c.

Referenced by avcodec_open2().

int ff_thread_ref_frame	(	ThreadFrame *	dst,
		ThreadFrame *	src
	)

Definition at line 3026 of file libavcodec/utils.c.

Referenced by ff_mpeg_ref_picture(), mimic_decode_update_thread_context(), ref_frame(), ref_picture(), update_frames(), vp3_decode_frame(), and vp8_ref_frame().

void ff_thread_release_buffer	(	AVCodecContext *	avctx,
		ThreadFrame *	f
	)

Wrapper around release_buffer() frame-for multithreaded codecs.

Call this function instead of avctx->release_buffer(f). The AVFrame will be copied and the actual release_buffer() call will be performed later. The contents of data pointed to by the AVFrame should not be changed until ff_thread_get_buffer() is called on it.

Parameters

avctx	The current context.
f	The picture being released.

Definition at line 3058 of file libavcodec/utils.c.

Referenced by ff_thread_ref_frame().

void ff_thread_report_progress	(	ThreadFrame *	f,
		int	progress,
		int	field
	)

Notify later decoding threads when part of their reference picture is ready.

Call this when some part of the picture is finished decoding. Later calls with lower values of progress have no effect.

Parameters

f	The picture being decoded.
progress	Value, in arbitrary units, of how much of the picture has decoded.
field	The field being decoded, for field-picture codecs. 0 for top field or frame pictures, 1 for bottom field.

Definition at line 3067 of file libavcodec/utils.c.

int ff_unlock_avcodec ( void )

Definition at line 2988 of file libavcodec/utils.c.

Referenced by avcodec_close(), avcodec_open2(), ff_codec_close_recursive(), ff_codec_open2_recursive(), and ff_lock_avcodec().