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/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 <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <float.h>

Macros
#define	INTERNAL_BUFFER_SIZE (32 + 1)

#define	STRIDE_ALIGN 16

#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: "

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.

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.

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.

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.

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.

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.

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.

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].

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.

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.

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_buffer (AVCodecContext avctx, AVFrame frame)

void	ff_init_buffer_info (AVCodecContext s, AVFrame frame)
	does needed setup of pkt_pts/pos and such for (re)get_buffer();

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

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.

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

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

AVDictionary **	ff_frame_get_metadatap (AVFrame *frame)

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.

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

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

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.

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

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

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.

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.

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.

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.

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

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

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

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.

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

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

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

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

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.

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.

unsigned	avcodec_version (void)
	Return the LIBAVCODEC_VERSION_INT constant.

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

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

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

static void	video_free_buffers (AVCodecContext *s)

static void	audio_free_buffers (AVCodecContext *avctx)

void	avcodec_default_free_buffers (AVCodecContext *avctx)

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

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

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

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

int	ff_thread_init (AVCodecContext *s)

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

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.

void	av_log_missing_feature (void avc, const char feature, int want_sample)
	Log a generic warning message about a missing feature.

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

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

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.

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.

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

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_get_buffer (AVCodecContext avctx, AVFrame f)
	Wrapper around get_buffer() for frame-multithreaded codecs.

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

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.

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

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

int	ff_thread_can_start_frame (AVCodecContext *avctx)

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

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.

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 utils.c.

Macro Definition Documentation

#define INTERNAL_BUFFER_SIZE (32 + 1)

Definition at line 182 of file utils.c.

Referenced by video_free_buffers(), and video_get_buffer().

#define STRIDE_ALIGN 16

Definition at line 185 of file utils.c.

Referenced by avcodec_align_dimensions2().

#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; }

Definition at line 756 of file utils.c.

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

Definition at line 1890 of file utils.c.

Referenced by recode_subtitle().

#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 LICENSE_PREFIX "libavcodec license: "

Referenced by avcodec_license(), avdevice_license(), avfilter_license(), avformat_license(), avresample_license(), avutil_license(), postproc_license(), swresample_license(), and swscale_license().

Function Documentation

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

inlinestatic

Definition at line 80 of file utils.c.

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

static void avcodec_init ( void )

static

Definition at line 134 of file utils.c.

Referenced by avcodec_register().

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

static

Definition at line 361 of file utils.c.

Referenced by avcodec_default_get_buffer().

static int video_get_buffer	(	AVCodecContext *	s,
		AVFrame *	pic
	)

static

Definition at line 392 of file utils.c.

Referenced by avcodec_default_get_buffer().

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

Definition at line 513 of file utils.c.

Referenced by ff_h264_frame_start().

void ff_init_buffer_info	(	AVCodecContext *	s,
		AVFrame *	frame
	)

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

Definition at line 548 of file utils.c.

Referenced by avcodec_default_reget_buffer(), ff_get_buffer(), and ff_thread_get_buffer().

int ff_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

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 579 of file utils.c.

Referenced by ac3_decode_frame(), adpcm_decode_frame(), adx_decode_frame(), amrnb_decode_frame(), amrwb_decode_frame(), ape_decode_frame(), atrac1_decode_frame(), atrac3_decode_frame(), aura_decode_frame(), avcodec_default_reget_buffer(), 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_snow_common_init_after_header(), ff_snow_frame_start(), ff_thread_get_buffer(), ff_thread_video_encode_frame(), ff_vp56_decode_frame(), flac_decode_frame(), frame_configure_elements(), g722_decode_frame(), g723_1_decode_frame(), 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(), ptx_decode_frame(), qcelp_decode_frame(), qdm2_decode_frame(), ra144_decode_frame(), ra288_decode_frame(), 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(), 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(), 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(), yop_decode_frame(), yuv4_decode_frame(), zero12v_decode_frame(), and zerocodec_decode_frame().

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 679 of file utils.c.

static int is_hwaccel_pix_fmt ( enum AVPixelFormat pix_fmt )

static

Definition at line 691 of file utils.c.

Referenced by avcodec_default_get_format().

AVDictionary** ff_frame_get_metadatap ( AVFrame * frame )

Definition at line 770 of file utils.c.

Referenced by add_doubles_metadata(), add_metadata_from_side_data(), add_shorts_metadata(), add_string_metadata(), and decode_frame().

static void avcodec_get_subtitle_defaults ( AVSubtitle * sub )

static

Definition at line 775 of file utils.c.

Referenced by avcodec_decode_subtitle2().

static int get_bit_rate ( AVCodecContext * ctx )

static

Definition at line 781 of file utils.c.

Referenced by avcodec_open2(), and avcodec_string().

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 811 of file utils.c.

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 1147 of file utils.c.

Referenced by a64multi_encode_frame(), aac_encode_frame(), aacPlus_encode_frame(), adx_encode_frame(), alac_encode_frame(), amr_wb_encode_frame(), avui_encode_frame(), bmp_encode_frame(), dnxhd_encode_picture(), 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(), gif_encode_frame(), ilbc_encode_frame(), libgsm_encode_frame(), libopenjpeg_encode_frame(), libopus_encode(), libschroedinger_encode_frame(), mp3lame_encode_frame(), MPA_encode_frame(), oggvorbis_encode_frame(), pam_encode_frame(), pcm_encode_frame(), pcx_encode_frame(), pnm_encode_frame(), 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().

int ff_alloc_packet	(	AVPacket *	avpkt,
		int	size
	)

Definition at line 1184 of file utils.c.

Referenced by cng_encode_frame().

static int pad_last_frame	(	AVCodecContext *	s,
		AVFrame **	dst,
		const AVFrame *	src
	)

static

Pad last frame with silence.

Definition at line 1192 of file utils.c.

Referenced by avcodec_encode_audio2().

static int64_t guess_correct_pts	(	AVCodecContext *	ctx,
		int64_t	reordered_pts,
		int64_t	dts
	)

static

Attempt to guess proper monotonic timestamps for decoded video frames which might have incorrect times.

Input timestamps may wrap around, in which case the output will as well.

Parameters

pts	the pts field of the decoded AVPacket, as passed through AVFrame.pkt_pts
dts	the dts field of the decoded AVPacket

Returns: one of the input values, may be AV_NOPTS_VALUE

Definition at line 1574 of file utils.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

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

static

Definition at line 1596 of file utils.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

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

static

Definition at line 1638 of file utils.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

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

static

Definition at line 1891 of file utils.c.

Referenced by avcodec_decode_subtitle2().

av_cold int ff_codec_close_recursive ( AVCodecContext * avctx )

Call avcodec_close recursively, counterpart to avcodec_open2_recursive.

Definition at line 2023 of file utils.c.

static enum AVCodecID remap_deprecated_codec_id ( enum AVCodecID id )

static

Definition at line 2072 of file utils.c.

Referenced by find_encdec().

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

static

Definition at line 2084 of file utils.c.

Referenced by avcodec_find_decoder(), and avcodec_find_encoder().

static void video_free_buffers ( AVCodecContext * s )

static

Definition at line 2338 of file utils.c.

Referenced by avcodec_default_free_buffers().

static void audio_free_buffers ( AVCodecContext * avctx )

static

Definition at line 2361 of file utils.c.

Referenced by avcodec_default_free_buffers().

int ff_thread_init ( AVCodecContext * s )

Definition at line 2630 of file utils.c.

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 2651 of file utils.c.

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

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

Definition at line 2668 of file utils.c.

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 2699 of file utils.c.

Referenced by ff_h263_decode_init(), h264_slice_header_init(), vc1_decode_init(), and vcr2_init_sequence().

int ff_lock_avcodec ( AVCodecContext * log_ctx )

Definition at line 2730 of file utils.c.

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

int ff_unlock_avcodec ( void )

Definition at line 2748 of file utils.c.

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

int avpriv_lock_avformat ( void )

Definition at line 2760 of file utils.c.

Referenced by ff_tls_deinit(), and ff_tls_init().

int avpriv_unlock_avformat ( void )

Definition at line 2769 of file utils.c.

Referenced by ff_tls_deinit(), and ff_tls_init().

unsigned int avpriv_toupper4 ( unsigned int x )

Definition at line 2778 of file utils.c.

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

int ff_thread_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	f
	)

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 2788 of file utils.c.

void ff_thread_release_buffer	(	AVCodecContext *	avctx,
		AVFrame *	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 2795 of file utils.c.

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 2800 of file utils.c.

void ff_thread_report_progress	(	AVFrame *	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 2804 of file utils.c.

void ff_thread_await_progress	(	AVFrame *	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 2808 of file utils.c.

int ff_thread_can_start_frame ( AVCodecContext * avctx )

Definition at line 2812 of file utils.c.

Referenced by ff_h264_frame_start(), and ff_MPV_frame_start().