#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "codec.h"
#include "codec_internal.h"
#include "decode.h"
#include "hwconfig.h"
#include "thread.h"
#include "threadframe.h"
#include "internal.h"
#include "put_bits.h"
#include "startcode.h"
#include <stdlib.h>
#include <limits.h>

Functions
void	av_fast_padded_malloc (void ptr, unsigned int size, size_t min_size)
	Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end which 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...

int	av_codec_is_encoder (const AVCodec *avcodec)

int	av_codec_is_decoder (const AVCodec *avcodec)

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. More...

int	ff_set_sar (AVCodecContext *avctx, AVRational sar)
	Check that the provided sample aspect ratio is valid and set it on the codec context. More...

int	ff_side_data_update_matrix_encoding (AVFrame *frame, enum AVMatrixEncoding matrix_encoding)
	Add or update AV_FRAME_DATA_MATRIXENCODING side data. More...

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_enum_to_chroma_pos (int xpos, int ypos, enum AVChromaLocation pos)
	Converts AVChromaLocation to swscale x/y chroma position. More...

enum AVChromaLocation	avcodec_chroma_pos_to_enum (int xpos, int ypos)
	Converts swscale x/y chroma position to AVChromaLocation. 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...

int	avpriv_codec_get_cap_skip_frame_fill_param (const AVCodec *codec)

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

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

const char *	avcodec_profile_name (enum AVCodecID codec_id, int profile)
	Return a name for the specified profile, if available. 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...

static int	get_audio_frame_duration (enum AVCodecID id, int sr, int ch, int ba, uint32_t tag, int bits_per_coded_sample, int64_t bitrate, uint8_t *extradata, int frame_size, int frame_bytes)

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

int	av_get_audio_frame_duration2 (AVCodecParameters *par, int frame_bytes)
	This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters instead of an AVCodecContext. 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...

const AVCodecHWConfig *	avcodec_get_hw_config (const AVCodec *avcodec, int index)
	Retrieve supported hardware configurations for a codec. More...

int	ff_thread_ref_frame (ThreadFrame dst, const ThreadFrame src)

int	ff_thread_replace_frame (AVCodecContext avctx, ThreadFrame dst, const ThreadFrame *src)

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

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

void	ff_thread_release_buffer (AVCodecContext avctx, AVFrame f)
	Wrapper around av_frame_unref() for frame-threaded codecs. More...

void	ff_thread_release_ext_buffer (AVCodecContext avctx, ThreadFrame f)
	Unref a ThreadFrame. 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 (const ThreadFrame *f, int progress, int field)
	Wait for earlier decoding threads to finish reference pictures. More...

int	ff_thread_can_start_frame (AVCodecContext *avctx)

int	ff_slice_thread_init_progress (AVCodecContext *avctx)

int	ff_slice_thread_allocz_entries (AVCodecContext *avctx, int count)

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)

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

AVCPBProperties *	av_cpb_properties_alloc (size_t *size)
	Allocate a CPB properties structure and initialize its fields to default values. More...

static unsigned	bcd2uint (uint8_t bcd)

int	ff_alloc_timecode_sei (const AVFrame frame, AVRational rate, size_t prefix_len, void data, size_t sei_size)
	Check AVFrame for S12M timecode side data and allocate and fill TC SEI message with timecode info. More...

int64_t	ff_guess_coded_bitrate (AVCodecContext *avctx)
	Get an estimated video bitrate based on frame size, frame rate and coded bits per pixel. More...

Detailed Description

utils.

Definition in file utils.c.

Function Documentation

◆ ff_set_dimensions()

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.

Definition at line 91 of file utils.c.

Referenced by alloc_buffers(), aom_decode(), apply_param_change(), avcodec_open2(), avs_decode_init(), bmp_decode_frame(), cdg_decode_init(), cdxl_decode_frame(), cfhd_decode(), clv_decode_init(), cmv_process_header(), codec_reinit(), cri_decode_frame(), dds_decode(), decode_blocks(), decode_fint(), decode_frame(), decode_frame_header(), decode_frame_headers(), decode_header(), decode_idat_chunk(), decode_init(), decode_seq_header(), dirac_decode_data_unit(), dnxhd_decode_frame(), dvbsub_parse_display_definition_segment(), dvdsub_parse_extradata(), dvvideo_decode_frame(), execute_code(), ff_h263_decode_frame(), ff_ivi_decode_frame(), ff_mjpeg_decode_sof(), ff_pnm_decode_header(), ff_rv34_decode_frame(), ff_vc1_decode_entry_point(), ff_vc1_decode_sequence_header(), ff_vp56_decode_frame(), ffmal_update_format(), fits_decode_frame(), flashsv_decode_frame(), g2m_decode_frame(), gem_decode_frame(), get_siz(), gif_decode_frame(), h261_decode_frame(), hdr_decode_frame(), hqa_decode_frame(), init_image(), libdav1d_parse_extradata(), libdav1d_receive_frame(), libjxl_receive_frame(), librsvg_decode_frame(), libuavs3d_decode_frame(), magy_decode_frame(), mediacodec_dec_parse_format(), mimic_decode_frame(), mpeg4_decode_header(), mpeg_decode_postinit(), mpegvideo_extract_headers(), mvc_decode_init(), parse_presentation_segment(), pcx_decode_frame(), pgx_decode_frame(), photocd_decode_frame(), pix_decode_frame(), pixlet_decode_frame(), process_frame_obj(), ptx_decode_frame(), qoi_decode_frame(), rl2_decode_init(), rv20_decode_picture_header(), seqvideo_decode_init(), set_context_with_sequence(), sga_decode_frame(), sunrast_decode_frame(), svc_decode_frame(), svq1_decode_frame(), svq3_decode_init(), tdsc_parse_tdsf(), tgq_decode_frame(), tgv_decode_frame(), tqi_decode_frame(), truemotion1_decode_header(), truemotion2rt_decode_header(), txd_decode_frame(), update_context_with_frame_header(), update_dimensions(), update_size(), v4l2_handle_event(), vbn_decode_frame(), vp56_size_changed(), vp5_parse_header(), vp6_parse_header(), vp8_lossless_decode_frame(), vpx_decode(), vqa_decode_init(), wbmp_decode_frame(), xbm_decode_frame(), xpm_decode_frame(), and xwd_decode_frame().

◆ ff_set_sar()

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 106 of file utils.c.

Referenced by aom_decode(), decode_frame(), decode_sequence_header_adv(), dirac_decode_data_unit(), dvvideo_decode_frame(), export_stream_params(), ff_h263_decode_frame(), h264_slice_header_init(), libdav1d_receive_frame(), mediacodec_dec_parse_format(), truemotion1_decode_header(), and update_context_with_frame_header().

◆ ff_side_data_update_matrix_encoding()

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 121 of file utils.c.

Referenced by ac3_decode_frame(), ff_dca_core_filter_frame(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), and output_data().

◆ avpriv_codec_get_cap_skip_frame_fill_param()

int avpriv_codec_get_cap_skip_frame_fill_param ( const AVCodec * codec )

Definition at line 410 of file utils.c.

Referenced by try_decode_frame().

◆ get_audio_frame_duration()

static int get_audio_frame_duration	(	enum AVCodecID	id,
		int	sr,
		int	ch,
		int	ba,
		uint32_t	tag,
		int	bits_per_coded_sample,
		int64_t	bitrate,
		uint8_t *	extradata,
		int	frame_size,
		int	frame_bytes
	)

static

Definition at line 575 of file utils.c.

Referenced by av_get_audio_frame_duration(), and av_get_audio_frame_duration2().

◆ ff_thread_init()

int ff_thread_init ( AVCodecContext * s )

Definition at line 828 of file utils.c.

◆ av_xiphlacing()

unsigned int av_xiphlacing	(	unsigned char *	s,
		unsigned int	v
	)

Encode extradata length to a buffer.

Used by xiph codecs.

Parameters

s	buffer to write to; must be at least (v/255+1) bytes long
v	size of extradata in bytes

Returns: number of bytes written to the buffer.

Definition at line 835 of file utils.c.

Referenced by fixup_vorbis_headers(), libvorbis_encode_init(), parse_packed_headers(), put_main_header(), and track_header().

◆ ff_match_2uint16()

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 849 of file utils.c.

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

◆ ff_thread_ref_frame()

int ff_thread_ref_frame	(	ThreadFrame *	dst,
		const ThreadFrame *	src
	)

Definition at line 868 of file utils.c.

Referenced by ff_h264_ref_picture(), ff_mpeg_ref_picture(), h264_field_start(), hevc_ref_frame(), update_frames(), vp9_decode_frame(), and vp9_frame_ref().

◆ ff_thread_replace_frame()

int ff_thread_replace_frame	(	AVCodecContext *	avctx,
		ThreadFrame *	dst,
		const ThreadFrame *	src
	)

Definition at line 890 of file utils.c.

Referenced by ff_h264_replace_picture().

◆ ff_thread_get_buffer()

int ff_thread_get_buffer	(	AVCodecContext *	avctx,
		AVFrame *	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 913 of file utils.c.

◆ ff_thread_get_ext_buffer()

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

Wrapper around ff_get_buffer() for frame-multithreaded codecs.

Call this function instead of ff_get_buffer() if you might need to wait for progress on this frame. Cannot be called after the codec has called ff_thread_finish_setup().

Parameters

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

Note: : It is fine to call this with codecs that do not support frame threading.

Definition at line 918 of file utils.c.

◆ ff_thread_release_buffer()

void ff_thread_release_buffer	(	AVCodecContext *	avctx,
		AVFrame *	f
	)

Wrapper around av_frame_unref() for frame-threaded codecs.

Parameters

avctx	The current context.
f	The picture being released.

Definition at line 924 of file utils.c.

◆ ff_thread_release_ext_buffer()

void ff_thread_release_ext_buffer	(	AVCodecContext *	avctx,
		ThreadFrame *	f
	)

Unref a ThreadFrame.

This is basically a wrapper around av_frame_unref() and should be called instead of it.

Parameters

avctx	The current context.
f	The picture being released.

Definition at line 930 of file utils.c.

Referenced by ff_thread_ref_frame(), and ff_thread_replace_frame().

◆ ff_thread_finish_setup()

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 937 of file utils.c.

◆ ff_thread_report_progress()

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 941 of file utils.c.

◆ ff_thread_await_progress()

void ff_thread_await_progress	(	const 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 945 of file utils.c.

◆ ff_thread_can_start_frame()

int ff_thread_can_start_frame ( AVCodecContext * avctx )

Definition at line 949 of file utils.c.

◆ ff_slice_thread_init_progress()

int ff_slice_thread_init_progress ( AVCodecContext * avctx )

Definition at line 954 of file utils.c.

◆ ff_slice_thread_allocz_entries()

int ff_slice_thread_allocz_entries	(	AVCodecContext *	avctx,
		int	count
	)

Definition at line 959 of file utils.c.

◆ ff_thread_await_progress2()

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

Definition at line 964 of file utils.c.

◆ ff_thread_report_progress2()

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

Definition at line 968 of file utils.c.

◆ avpriv_find_start_code()

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 974 of file utils.c.

◆ av_cpb_properties_alloc()

AVCPBProperties* av_cpb_properties_alloc ( size_t * size )

Allocate a CPB properties structure and initialize its fields to default values.

Parameters

size	if non-NULL, the size of the allocated struct will be written here. This is useful for embedding it in side data.

Returns: the newly allocated struct or NULL on failure

Definition at line 1007 of file utils.c.

Referenced by avformat_find_stream_info(), ff_encode_add_cpb_side_data(), and ff_mpv_encode_picture().

◆ bcd2uint()

static unsigned bcd2uint ( uint8_t bcd )

static

Definition at line 1021 of file utils.c.

Referenced by ff_alloc_timecode_sei().

◆ ff_alloc_timecode_sei()

int ff_alloc_timecode_sei	(	const AVFrame *	frame,
		AVRational	rate,
		size_t	prefix_len,
		void **	data,
		size_t *	sei_size
	)

Check AVFrame for S12M timecode side data and allocate and fill TC SEI message with timecode info.

Parameters

frame	Raw frame to get S12M timecode side data from
rate	The frame rate
prefix_len	Number of bytes to allocate before SEI message
data	Pointer to a variable to store allocated memory Upon return the variable will hold NULL on error or if frame has no S12M timecode info. Otherwise it will point to prefix_len uninitialized bytes followed by *sei_size SEI message
sei_size	Pointer to a variable to store generated SEI message length

Returns: Zero on success, negative error code on failure

Definition at line 1030 of file utils.c.

Referenced by prepare_sei_data_array().

◆ ff_guess_coded_bitrate()

int64_t ff_guess_coded_bitrate ( AVCodecContext * avctx )

Get an estimated video bitrate based on frame size, frame rate and coded bits per pixel.

Definition at line 1094 of file utils.c.

Referenced by encode_init(), raw_encode_init(), v308_encode_init(), v408_encode_init(), v410_encode_init(), and y41p_encode_init().

Functions

Detailed Description

Function Documentation

◆ ff_set_dimensions()

◆ ff_set_sar()

◆ ff_side_data_update_matrix_encoding()

◆ avpriv_codec_get_cap_skip_frame_fill_param()

◆ get_audio_frame_duration()

◆ ff_thread_init()

◆ av_xiphlacing()

◆ ff_match_2uint16()

◆ ff_thread_ref_frame()

◆ ff_thread_replace_frame()

◆ ff_thread_get_buffer()

◆ ff_thread_get_ext_buffer()

◆ ff_thread_release_buffer()

◆ ff_thread_release_ext_buffer()

◆ ff_thread_finish_setup()

◆ ff_thread_report_progress()

◆ ff_thread_await_progress()

◆ ff_thread_can_start_frame()

◆ ff_slice_thread_init_progress()

◆ ff_slice_thread_allocz_entries()

◆ ff_thread_await_progress2()

◆ ff_thread_report_progress2()

◆ avpriv_find_start_code()

◆ av_cpb_properties_alloc()

◆ bcd2uint()

◆ ff_alloc_timecode_sei()

◆ ff_guess_coded_bitrate()