FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
Data Structures | Macros | Functions | Variables
utils.c File Reference

utils. More...

#include "config.h"
#include "libavutil/atomic.h"
#include "libavutil/attributes.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/internal.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 "libavutil/opt.h"
#include "me_cmp.h"
#include "mpegvideo.h"
#include "thread.h"
#include "frame_thread_encoder.h"
#include "internal.h"
#include "raw.h"
#include "bytestream.h"
#include "version.h"
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <float.h>

Go to the source code of this file.

Data Structures

struct  CompatReleaseBufPriv
 

Macros

#define LIBNAME   "LIBAVCODEC_55"
 
#define WRAP_PLANE(ref_out, data, data_size)
 
#define UTF8_MAX_BYTES   4 /* 5 and 6 bytes sequences should not be used */
 
#define TAG_PRINT(x)
 
#define LICENSE_PREFIX   "libavcodec license: "
 

Functions

static int ff_fast_malloc (void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
 
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 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.
 
AVCodecav_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 av_cold void avcodec_init (void)
 
int av_codec_is_encoder (const AVCodec *codec)
 
int av_codec_is_decoder (const AVCodec *codec)
 
av_cold 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)
 
int ff_set_dimensions (AVCodecContext *s, int width, int height)
 Check that the provided frame dimensions are valid and set them on the codec context.
 
int ff_set_sar (AVCodecContext *avctx, AVRational sar)
 Check that the provided sample aspect ratio is valid and set it on the codec context.
 
int ff_side_data_update_matrix_encoding (AVFrame *frame, enum AVMatrixEncoding matrix_encoding)
 Add or update AV_FRAME_DATA_MATRIXENCODING side data.
 
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_enum_to_chroma_pos (int *xpos, int *ypos, enum AVChromaLocation pos)
 Converts AVChromaLocation to swscale x/y chroma position.
 
enum AVChromaLocation avcodec_chroma_pos_to_enum (int xpos, int ypos)
 Converts swscale x/y chroma position to AVChromaLocation.
 
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 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().
 
int ff_init_buffer_info (AVCodecContext *avctx, AVFrame *frame)
 does needed setup of pkt_pts/pos and such for (re)get_buffer();
 
FF_DISABLE_DEPRECATION_WARNINGS 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)
 
FF_ENABLE_DEPRECATION_WARNINGS int ff_decode_frame_props (AVCodecContext *avctx, AVFrame *frame)
 Set various frame properties from the codec context / packet 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.
 
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.
 
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)
 
enum AVPixelFormat avpriv_find_pix_fmt (const PixelFormatTag *tags, unsigned int fourcc)
 
static int is_hwaccel_pix_fmt (enum AVPixelFormat pix_fmt)
 
enum AVPixelFormat avcodec_default_get_format (struct AVCodecContext *s, const enum AVPixelFormat *fmt)
 
static AVHWAccelfind_hwaccel (enum AVCodecID codec_id, enum AVPixelFormat pix_fmt)
 
int ff_get_format (AVCodecContext *avctx, const enum AVPixelFormat *fmt)
 Select the (possibly hardware accelerated) pixel format.
 
int av_codec_get_max_lowres (const AVCodec *codec)
 
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, int64_t 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_audio (AVCodecContext *avctx, uint8_t *buf, int buf_size, const short *samples)
 Encode an audio frame from samples into buf.
 
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.
 
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 int apply_param_change (AVCodecContext *avctx, AVPacket *avpkt)
 
static int add_metadata_from_side_data (AVCodecContext *avctx, AVFrame *frame)
 
static int unrefcount_frame (AVCodecInternal *avci, 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_audio3 (AVCodecContext *avctx, int16_t *samples, int *frame_size_ptr, AVPacket *avpkt)
 Wrapper function which calls avcodec_decode_audio4.
 
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)
 
static int utf8_check (const uint8_t *str)
 
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 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 AVCodecfind_encdec (enum AVCodecID id, int encoder)
 
AVCodecavcodec_find_encoder (enum AVCodecID id)
 Find a registered encoder with a matching codec ID.
 
AVCodecavcodec_find_encoder_by_name (const char *name)
 Find a registered encoder with the specified name.
 
AVCodecavcodec_find_decoder (enum AVCodecID id)
 Find a registered decoder with a matching codec ID.
 
AVCodecavcodec_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)
 Reset the internal decoder state / flush internal buffers.
 
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.
 
FF_DISABLE_DEPRECATION_WARNINGS
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.
 
AVHWAccelav_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.
 
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_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.
 
int ff_thread_get_buffer (AVCodecContext *avctx, ThreadFrame *f, int flags)
 Wrapper around get_buffer() for frame-multithreaded codecs.
 
void ff_thread_release_buffer (AVCodecContext *avctx, ThreadFrame *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 (ThreadFrame *f, int progress, int field)
 Notify later decoding threads when part of their reference picture is ready.
 
void ff_thread_await_progress (ThreadFrame *f, int progress, int field)
 Wait for earlier decoding threads to finish reference pictures.
 
int ff_thread_can_start_frame (AVCodecContext *avctx)
 
int ff_alloc_entries (AVCodecContext *avctx, int count)
 
void ff_reset_entries (AVCodecContext *avctx)
 
void ff_thread_await_progress2 (AVCodecContext *avctx, int field, int thread, int shift)
 
void ff_thread_report_progress2 (AVCodecContext *avctx, int field, int thread, int n)
 
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.
 
const uint8_tavpriv_find_start_code (const uint8_t *av_restrict p, const uint8_t *end, uint32_t *av_restrict state)
 

Variables

static int(* lockmgr_cb )(void **mutex, enum AVLockOp op) = NULL
 
volatile int ff_avcodec_locked
 
static int volatile entangled_thread_counter = 0
 
static voidcodec_mutex
 
static voidavformat_mutex
 
static AVCodecfirst_avcodec = NULL
 
static AVCodec ** last_avcodec = &first_avcodec
 
static
FF_ENABLE_DEPRECATION_WARNINGS
AVHWAccel
first_hwaccel = NULL
 
static AVHWAccel ** last_hwaccel = &first_hwaccel
 

Detailed Description

utils.

Definition in file utils.c.

Macro Definition Documentation

#define LIBNAME   "LIBAVCODEC_55"

Definition at line 125 of file utils.c.

#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 get_buffer_internal().

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

Definition at line 2527 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: "

Function Documentation

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

Definition at line 140 of file utils.c.

Referenced by av_fast_padded_malloc(), and av_fast_padded_mallocz().

static av_cold void avcodec_init ( void  )
static

Definition at line 190 of file utils.c.

Referenced by avcodec_register().

int ff_set_dimensions ( AVCodecContext s,
int  width,
int  height 
)
int ff_set_sar ( AVCodecContext avctx,
AVRational  sar 
)

Check that the provided sample aspect ratio is valid and set it on the codec context.

Definition at line 259 of file utils.c.

Referenced by avpriv_dirac_parse_sequence_header(), decode_frame(), decode_header(), decode_sequence_header_adv(), dvvideo_decode_frame(), ff_h263_decode_frame(), h264_slice_header_init(), mjpeg_decode_app(), set_sps(), and truemotion1_decode_header().

int ff_side_data_update_matrix_encoding ( AVFrame frame,
enum AVMatrixEncoding  matrix_encoding 
)

Add or update AV_FRAME_DATA_MATRIXENCODING side data.

Definition at line 274 of file utils.c.

Referenced by ac3_decode_frame(), dca_decode_frame(), and output_data().

static int update_frame_pool ( AVCodecContext avctx,
AVFrame frame 
)
static

Definition at line 515 of file utils.c.

Referenced by avcodec_default_get_buffer2().

static int audio_get_buffer ( AVCodecContext avctx,
AVFrame frame 
)
static

Definition at line 614 of file utils.c.

Referenced by avcodec_default_get_buffer2().

static int video_get_buffer ( AVCodecContext s,
AVFrame pic 
)
static

Definition at line 659 of file utils.c.

Referenced by avcodec_default_get_buffer2().

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

Definition at line 697 of file utils.c.

Referenced by h264_frame_start().

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 743 of file utils.c.

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

static void compat_free_buffer ( void opaque,
uint8_t data 
)
static

Definition at line 854 of file utils.c.

Referenced by get_buffer_internal().

static void compat_release_buffer ( void opaque,
uint8_t data 
)
static

Definition at line 862 of file utils.c.

FF_ENABLE_DEPRECATION_WARNINGS int ff_decode_frame_props ( AVCodecContext avctx,
AVFrame frame 
)

Set various frame properties from the codec context / packet data.

Definition at line 870 of file utils.c.

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

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

Definition at line 875 of file utils.c.

Referenced by ff_get_buffer().

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 1033 of file utils.c.

Referenced by ac3_decode_frame(), adpcm_decode_frame(), adx_decode_frame(), aic_decode_frame(), amrnb_decode_frame(), amrwb_decode_frame(), ape_decode_frame(), atrac1_decode_frame(), atrac3_decode_frame(), atrac3p_decode_frame(), aura_decode_frame(), avui_decode_frame(), bfi_decode_frame(), bmp_decode_frame(), bmv_aud_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_frame(), decode_pic(), decode_tag(), decode_thread(), dfa_decode_frame(), dpcm_decode_frame(), dvvideo_decode_frame(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxtory_decode_v2_410(), dxtory_decode_v2_420(), dxtory_decode_v2_444(), dxtory_decode_v2_565(), dxtory_decode_v2_rgb(), eightsvx_decode_frame(), escape124_decode_frame(), escape130_decode_frame(), evrc_decode_frame(), execute_code(), fdk_aac_decode_frame(), ff_ivi_decode_frame(), ff_mjpeg_decode_sof(), ff_snow_common_init_after_header(), ff_snow_get_buffer(), ff_thread_get_buffer(), ff_thread_video_encode_frame(), ff_twinvq_decode_frame(), ff_vp56_decode_frame(), frame_configure_elements(), g2m_decode_frame(), g722_decode_frame(), g723_1_decode_frame(), get_buffer(), get_buffer_sao(), get_buffer_with_edge(), gif_decode_frame(), gsm_decode_frame(), hnm_decode_frame(), idcin_decode_frame(), ilbc_decode_frame(), imc_decode_frame(), 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(), on2avc_decode_frame(), opus_decode_packet(), output_data(), paf_audio_decode(), pcm_bluray_decode_frame(), pcm_decode_frame(), pcm_dvd_decode_frame(), pcx_decode_frame(), pix_decode_frame(), pnm_decode_frame(), 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(), tgq_decode_frame(), tgv_decode_frame(), thread_get_buffer_internal(), tmv_decode_frame(), tqi_decode_frame(), truespeech_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(), 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().

static int reget_buffer_internal ( AVCodecContext avctx,
AVFrame frame 
)
static

Definition at line 1041 of file utils.c.

Referenced by ff_reget_buffer().

int ff_reget_buffer ( AVCodecContext avctx,
AVFrame 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 1115 of file utils.c.

enum AVPixelFormat avpriv_find_pix_fmt ( const PixelFormatTag tags,
unsigned int  fourcc 
)
static int is_hwaccel_pix_fmt ( enum AVPixelFormat  pix_fmt)
static

Definition at line 1138 of file utils.c.

Referenced by avcodec_default_get_format().

static AVHWAccel* find_hwaccel ( enum AVCodecID  codec_id,
enum AVPixelFormat  pix_fmt 
)
static

Definition at line 1151 of file utils.c.

Referenced by ff_get_format().

int ff_get_format ( AVCodecContext avctx,
const enum AVPixelFormat fmt 
)

Select the (possibly hardware accelerated) pixel format.

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

Definition at line 1164 of file utils.c.

Referenced by decode_init(), ff_h263_decode_init(), ff_thread_get_format(), submit_packet(), and vc1_decode_init().

static void avcodec_get_subtitle_defaults ( AVSubtitle sub)
static

Definition at line 1246 of file utils.c.

Referenced by avcodec_decode_subtitle2().

static int get_bit_rate ( AVCodecContext ctx)
static

Definition at line 1252 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 1275 of file utils.c.

Referenced by smvjpeg_decode_init().

int ff_alloc_packet2 ( AVCodecContext avctx,
AVPacket avpkt,
int64_t  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
avctxthe AVCodecContext of the encoder
avpktthe 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().
sizethe minimum required packet size
Returns
0 on success, negative error code on failure

Definition at line 1650 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(), cinepak_encode_frame(), dnxhd_encode_picture(), dvvideo_encode_frame(), encode_frame(), encode_nals(), 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(), libshine_encode_frame(), libvorbis_encode_frame(), ljpeg_encode_frame(), mp3lame_encode_frame(), MPA_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(), s302m_encode2_frame(), storeframe(), sunrast_encode_frame(), svq1_encode_frame(), targa_encode_frame(), tta_encode_frame(), twolame_encode_frame(), utvideo_encode_frame(), v308_encode_frame(), v408_encode_frame(), v410_encode_frame(), vorbis_encode_frame(), wavpack_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 
)
static int pad_last_frame ( AVCodecContext s,
AVFrame **  dst,
const AVFrame src 
)
static

Pad last frame with silence.

Definition at line 1714 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
ptsthe pts field of the decoded AVPacket, as passed through AVFrame.pkt_pts
dtsthe dts field of the decoded AVPacket
Returns
one of the input values, may be AV_NOPTS_VALUE

Definition at line 2109 of file utils.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

static int apply_param_change ( AVCodecContext avctx,
AVPacket avpkt 
)
static

Definition at line 2135 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 2192 of file utils.c.

Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().

static int unrefcount_frame ( AVCodecInternal avci,
AVFrame frame 
)
static

Definition at line 2204 of file utils.c.

Referenced by avcodec_decode_video2().

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

Definition at line 2528 of file utils.c.

Referenced by avcodec_decode_subtitle2().

static int utf8_check ( const uint8_t str)
static

Definition at line 2586 of file utils.c.

Referenced by avcodec_decode_subtitle2().

static enum AVCodecID remap_deprecated_codec_id ( enum AVCodecID  id)
static

Definition at line 2761 of file utils.c.

Referenced by find_encdec().

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

Definition at line 2789 of file utils.c.

Referenced by avcodec_find_decoder(), and avcodec_find_encoder().

int ff_thread_init ( AVCodecContext s)

Definition at line 3335 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 3356 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 3375 of file utils.c.

int ff_lock_avcodec ( AVCodecContext log_ctx)

Definition at line 3429 of file utils.c.

Referenced by avcodec_open2(), and ff_codec_open2_recursive().

int ff_unlock_avcodec ( void  )

Definition at line 3449 of file utils.c.

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

int avpriv_lock_avformat ( void  )

Definition at line 3461 of file utils.c.

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

int avpriv_unlock_avformat ( void  )

Definition at line 3470 of file utils.c.

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

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.

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

Parameters
avctxThe current context.
fmtThe list of available formats.

Definition at line 3508 of file 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
avctxThe current context.
fThe frame to write into.

Definition at line 3513 of file utils.c.

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
avctxThe current context.
fThe picture being released.

Definition at line 3519 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
avctxThe context.

Definition at line 3525 of file utils.c.

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
fThe picture being decoded.
progressValue, in arbitrary units, of how much of the picture has decoded.
fieldThe field being decoded, for field-picture codecs. 0 for top field or frame pictures, 1 for bottom field.

Definition at line 3529 of file utils.c.

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
fThe picture being referenced.
progressValue, in arbitrary units, to wait for.
fieldThe field being referenced, for field-picture codecs. 0 for top field or frame pictures, 1 for bottom field.

Definition at line 3533 of file utils.c.

int ff_thread_can_start_frame ( AVCodecContext avctx)

Definition at line 3537 of file utils.c.

Referenced by ff_MPV_frame_start(), and h264_frame_start().

int ff_alloc_entries ( AVCodecContext avctx,
int  count 
)

Definition at line 3542 of file utils.c.

void ff_reset_entries ( AVCodecContext avctx)

Definition at line 3547 of file utils.c.

void ff_thread_await_progress2 ( AVCodecContext avctx,
int  field,
int  thread,
int  shift 
)

Definition at line 3551 of file utils.c.

void ff_thread_report_progress2 ( AVCodecContext avctx,
int  field,
int  thread,
int  n 
)

Definition at line 3555 of file utils.c.

int avpriv_bprint_to_extradata ( AVCodecContext avctx,
struct AVBPrint buf 
)

Finalize buf into extradata and set its size appropriately.

Definition at line 3586 of file utils.c.

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

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 3604 of file utils.c.

Variable Documentation

int(* lockmgr_cb)(void **mutex, enum AVLockOp op) = NULL
static
volatile int ff_avcodec_locked

Definition at line 117 of file utils.c.

int volatile entangled_thread_counter = 0
static

Definition at line 118 of file utils.c.

void* codec_mutex
static

Definition at line 119 of file utils.c.

void* avformat_mutex
static

Definition at line 120 of file utils.c.

AVCodec* first_avcodec = NULL
static
AVCodec** last_avcodec = &first_avcodec
static

Definition at line 180 of file utils.c.

Referenced by avcodec_register().

FF_ENABLE_DEPRECATION_WARNINGS AVHWAccel* first_hwaccel = NULL
static

Definition at line 3392 of file utils.c.

Referenced by av_hwaccel_next().

AVHWAccel** last_hwaccel = &first_hwaccel
static

Definition at line 3393 of file utils.c.

Referenced by av_register_hwaccel().