internal.h File Reference

common internal api header. More...

#include <stdint.h>
#include "libavutil/buffer.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "config.h"

Go to the source code of this file.

Data Structures
struct	FramePool
struct	AVCodecInternal
struct	AVCodecDefault

Macros
#define	FF_SANE_NB_CHANNELS   63U
#define	FF_MAX_EXTRADATA_SIZE   ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
	Maximum size in bytes of extradata.

Functions
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	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.
unsigned int	avpriv_toupper4 (unsigned int x)
int	ff_init_buffer_info (AVCodecContext *s, AVFrame *frame)
	does needed setup of pkt_pts/pos and such for (re)get_buffer();
void	avpriv_color_frame (AVFrame *frame, const int color[4])
int	ff_lock_avcodec (AVCodecContext *log_ctx)
int	ff_unlock_avcodec (void)
int	avpriv_lock_avformat (void)
int	avpriv_unlock_avformat (void)
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 av_always_inline int64_t	ff_samples_to_time_base (AVCodecContext *avctx, int64_t samples)
	Rescale from sample rate to AVCodecContext.time_base.
int	ff_get_buffer (AVCodecContext *avctx, AVFrame *frame, int flags)
	Get a buffer for a 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.
int	ff_thread_can_start_frame (AVCodecContext *avctx)
int	avpriv_h264_has_num_reorder_frames (AVCodecContext *avctx)
int	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	ff_codec_close_recursive (AVCodecContext *avctx)
	Call avcodec_close recursively, counterpart to avcodec_open2_recursive.
int	avpriv_bprint_to_extradata (AVCodecContext *avctx, struct AVBPrint *buf)
	Finalize buf into extradata and set its size appropriately.
const uint8_t *	avpriv_find_start_code (const uint8_t *p, const uint8_t *end, uint32_t *state)

Variables
volatile int	ff_avcodec_locked

Detailed Description

common internal api header.

Definition in file internal.h.

Macro Definition Documentation

#define FF_SANE_NB_CHANNELS   63U

Definition at line 35 of file internal.h.

Referenced by avcodec_open2(), and ff_init_buffer_info().

#define FF_MAX_EXTRADATA_SIZE   ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)

Maximum size in bytes of extradata.

This value was chosen such that every bit of the buffer is addressable by a 32-bit signed integer as used by get_bits.

Definition at line 155 of file internal.h.

Referenced by avcodec_open2(), and avformat_find_stream_info().

Function Documentation

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 3197 of file utils.c.

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

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 3146 of file utils.c.

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

unsigned int avpriv_toupper4

(

unsigned int

x

)

Definition at line 3278 of file utils.c.

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

int ff_init_buffer_info	(	AVCodecContext *	s,
		AVFrame *	frame
	)

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

Definition at line 717 of file utils.c.

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

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

Definition at line 671 of file utils.c.

Referenced by h264_frame_start().

int ff_lock_avcodec

(

AVCodecContext *

log_ctx

)

Definition at line 3228 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 3248 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 3260 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 3269 of file utils.c.

Referenced by avisynth_read_close(), avisynth_read_header(), ff_tls_deinit(), and ff_tls_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

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 1493 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(), libshine_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(), 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
	)

Definition at line 1545 of file utils.c.

Referenced by cng_encode_frame().

static av_always_inline int64_t ff_samples_to_time_base ( AVCodecContext *  avctx, int64_t  samples  )

static

Rescale from sample rate to AVCodecContext.time_base.

Definition at line 181 of file internal.h.

Referenced by amr_wb_encode_frame(), avcodec_encode_audio2(), encode_frame(), encode_superframe(), ff_af_queue_remove(), flac_encode_frame(), MPA_encode_frame(), oggvorbis_encode_frame(), tta_encode_frame(), twolame_encode_frame(), vorbis_encode_frame(), and wavpack_encode_frame().

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 942 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(), aura_decode_frame(), avui_decode_frame(), bfi_decode_frame(), bmp_decode_frame(), bmv_aud_decode_frame(), brpix_decode_frame(), cdg_decode_frame(), cdxl_decode_frame(), cinaudio_decode_frame(), cllc_decode_frame(), cmv_decode_frame(), cng_decode_frame(), cook_decode_frame(), copy_frame(), copy_output(), cyuv_decode_frame(), dca_decode_frame(), decode_frame(), decode_p_frame(), decode_pic(), decode_tag(), decode_thread(), dfa_decode_frame(), dirac_decode_data_unit(), dirac_decode_picture_header(), dpcm_decode_frame(), dvvideo_decode_frame(), dxtory_decode_v1(), dxtory_decode_v2(), eightsvx_decode_frame(), encode_init(), 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_frame_start(), 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(), gif_decode_frame(), gsm_decode_frame(), hls_slice_header(), 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(), output_data(), paf_aud_decode(), pcm_bluray_decode_frame(), pcm_decode_frame(), pcm_dvd_decode_frame(), pcx_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(), vp9_decode_frame(), 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().

int ff_reget_buffer	(	AVCodecContext *	avctx,
		AVFrame *	frame
	)

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

Definition at line 987 of file utils.c.

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

int ff_thread_can_start_frame

(

AVCodecContext *

avctx

)

Definition at line 922 of file pthread.c.

Referenced by ff_MPV_frame_start(), and h264_frame_start().

int avpriv_h264_has_num_reorder_frames

(

AVCodecContext *

avctx

)

Definition at line 194 of file h264.c.

Referenced by has_decode_delay_been_guessed().

int 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 1138 of file utils.c.

Referenced by smvjpeg_decode_init().

int ff_codec_close_recursive

(

AVCodecContext *

avctx

)

Call avcodec_close recursively, counterpart to avcodec_open2_recursive.

Definition at line 2506 of file utils.c.

Referenced by smvjpeg_decode_end().

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

Finalize buf into extradata and set its size appropriately.

Definition at line 3384 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 *	p,
		const uint8_t *	end,
		uint32_t *	state
	)

Referenced by cavs_decode_frame(), decode_chunks(), ff_mpeg1_find_frame_end(), ff_rtp_send_mpegvideo(), mpeg_decode_slice(), mpegts_write_packet_internal(), mpegvideo_extract_headers(), parse_nal_units(), and slice_decode_thread().

Variable Documentation

volatile int ff_avcodec_locked

Definition at line 115 of file utils.c.