utils. More...
#include "libavutil/avassert.h"
#include "libavutil/avstring.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 "internal.h"
#include "bytestream.h"
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <float.h>
Go to the source code of this file.
Macros | |
#define | INTERNAL_BUFFER_SIZE (32 + 1) |
#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. More... | |
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) |
Allocate a buffer with padding, reusing the given one if large enough. 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 audio frame data and linesize. More... | |
static int | audio_get_buffer (AVCodecContext *avctx, AVFrame *frame) |
static int | video_get_buffer (AVCodecContext *s, AVFrame *pic) |
int | avcodec_default_get_buffer (AVCodecContext *avctx, AVFrame *frame) |
int | ff_get_buffer (AVCodecContext *avctx, AVFrame *frame) |
Get a buffer for a frame. 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... | |
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_packet (AVPacket *avpkt, int size) |
Check AVPacket size and/or allocate data. More... | |
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_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 void | apply_param_change (AVCodecContext *avctx, AVPacket *avpkt) |
int attribute_align_arg | avcodec_decode_video2 (AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, AVPacket *avpkt) |
Decode the video frame of size avpkt->size from avpkt->data into picture. More... | |
int attribute_align_arg | avcodec_decode_audio4 (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt) |
Decode the audio frame of size avpkt->size from avpkt->data into frame. More... | |
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 | avcodec_close (AVCodecContext *avctx) |
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext itself). More... | |
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... | |
static int | get_bit_rate (AVCodecContext *ctx) |
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... | |
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. 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) |
Log a generic warning message about a missing feature. More... | |
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 | 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. More... | |
void | ff_thread_release_buffer (AVCodecContext *avctx, AVFrame *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 (AVFrame *f, int progress, int field) |
Notify later decoding threads when part of their reference picture is ready. More... | |
void | ff_thread_await_progress (AVFrame *f, int progress, int field) |
Wait for earlier decoding threads to finish reference pictures. More... | |
enum AVMediaType | avcodec_get_type (enum AVCodecID codec_id) |
Get the type of the given codec. More... | |
int | avcodec_is_open (AVCodecContext *s) |
Variables | |
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 |
utils.
Definition in file utils.c.
#define INTERNAL_BUFFER_SIZE (32 + 1) |
Definition at line 157 of file utils.c.
Referenced by video_free_buffers(), and video_get_buffer().
#define LICENSE_PREFIX "libavcodec license: " |
Referenced by avcodec_license().
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Definition at line 1226 of file utils.c.
Referenced by avcodec_decode_audio4(), and avcodec_decode_video2().
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Definition at line 1750 of file utils.c.
Referenced by avcodec_default_free_buffers().
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Definition at line 300 of file utils.c.
Referenced by avcodec_default_get_buffer().
Definition at line 2017 of file utils.c.
Referenced by av_log_missing_feature().
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 109 of file utils.c.
Referenced by avcodec_register().
int avpriv_lock_avformat | ( | void | ) |
Definition at line 2079 of file utils.c.
Referenced by ff_tls_deinit(), and ff_tls_init().
unsigned int avpriv_toupper4 | ( | unsigned int | x | ) |
Definition at line 2097 of file utils.c.
Referenced by ff_codec_get_id(), ff_MPV_common_init(), and validate_codec_tag().
int avpriv_unlock_avformat | ( | void | ) |
Definition at line 2088 of file utils.c.
Referenced by ff_tls_deinit(), and ff_tls_init().
int ff_alloc_packet | ( | 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.
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 |
Definition at line 880 of file utils.c.
Referenced by a64multi_encode_frame(), aac_encode_frame(), adpcm_encode_frame(), adx_encode_frame(), alac_encode_frame(), amr_wb_encode_frame(), bmp_encode_frame(), cng_encode_frame(), dnxhd_encode_picture(), encode_frame(), encode_nals(), encode_picture_lossless(), encode_picture_ls(), encode_superframe(), Faac_encode_frame(), ff_MPV_encode_picture(), ffv1_encode_frame(), flac_encode_frame(), flashsv_encode_frame(), g722_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(), qtrle_encode_frame(), ra144_encode_frame(), raw_encode(), roq_dpcm_encode_frame(), roq_encode_frame(), storeframe(), sunrast_encode_frame(), targa_encode_frame(), utvideo_encode_frame(), v410_encode_frame(), vorbis_encode_frame(), XAVS_frame(), xbm_encode_frame(), and xwd_encode_frame().
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.
codec_id | the codec to match |
pix_fmt | the pixel format to match |
Definition at line 2048 of file utils.c.
Referenced by ff_h263_decode_init(), h264_slice_header_init(), vc1_decode_init(), and vcr2_init_sequence().
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 464 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(), 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(), cyuv_decode_frame(), dca_decode_frame(), decode_element(), decode_frame(), decode_frame_byterun1(), decode_frame_ilbm(), decode_p_frame(), decode_pic(), decode_tag(), dfa_decode_frame(), dnxhd_decode_frame(), dpcm_decode_frame(), dvvideo_decode_frame(), eightsvx_decode_frame(), encode_init(), escape124_decode_frame(), execute_code(), ff_ivi_decode_frame(), ff_mjpeg_decode_sof(), ff_snow_frame_start(), ff_thread_get_buffer(), ff_vp56_decode_frame(), ffv1_decode_frame(), flac_decode_frame(), frame_configure_elements(), g722_decode_frame(), g723_1_decode_frame(), get_buffer(), gif_decode_frame(), gsm_decode_frame(), idcin_decode_frame(), ilbc_decode_frame(), imc_decode_frame(), init_image(), ipvideo_decode_frame(), libgsm_decode_frame(), libopus_decode(), libschroedinger_decode_frame(), libspeex_decode_frame(), mace_decode_frame(), mca(), mp_decode_frame(), mpc7_decode_frame(), mpc8_decode_frame(), mss2_decode_frame(), mxpeg_decode_frame(), output_data(), 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(), v410_decode_frame(), vble_decode_frame(), vcr1_decode_frame(), vmdaudio_decode_frame(), vmdvideo_decode_frame(), vorbis_decode_frame(), vqa_decode_frame(), wavpack_decode_frame(), wma_decode_superframe(), ws_snd_decode_frame(), xan_decode_frame(), xwd_decode_frame(), yop_decode_frame(), and zerocodec_decode_frame().
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 2000 of file utils.c.
Referenced by ff_h263_encode_picture_header(), ff_MPV_encode_init(), and svq1_write_header().
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.
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. |
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().
avctx | The context. |
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().
avctx | The current context. |
f | The frame to write into. |
int ff_thread_init | ( | AVCodecContext * | s | ) |
Definition at line 1979 of file utils.c.
Referenced by avcodec_open2().
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.
avctx | The current context. |
f | The picture being released. |
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.
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 1479 of file utils.c.
Referenced by avcodec_find_decoder(), and avcodec_find_encoder().
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Definition at line 1534 of file utils.c.
Referenced by avcodec_string().
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Definition at line 591 of file utils.c.
Referenced by avcodec_default_get_format().
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Pad last frame with silence.
Definition at line 903 of file utils.c.
Referenced by avcodec_encode_audio2().
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Definition at line 1727 of file utils.c.
Referenced by avcodec_default_free_buffers().
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Definition at line 331 of file utils.c.
Referenced by avcodec_default_get_buffer().
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Definition at line 51 of file utils.c.
Referenced by av_lockmgr_register(), avpriv_lock_avformat(), and avpriv_unlock_avformat().
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Definition at line 50 of file utils.c.
Referenced by av_lockmgr_register(), avcodec_close(), and avcodec_open2().
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Definition at line 48 of file utils.c.
Referenced by avcodec_close(), and avcodec_open2().
Definition at line 49 of file utils.c.
Referenced by av_lockmgr_register(), avcodec_close(), avcodec_open2(), avpriv_lock_avformat(), and avpriv_unlock_avformat().
Definition at line 99 of file utils.c.
Referenced by av_codec_next(), avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), avcodec_register(), and find_encdec().
Definition at line 2032 of file utils.c.
Referenced by av_hwaccel_next(), and av_register_hwaccel().