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internal.h File Reference

common internal api header. More...

#include <stdint.h>
#include "libavutil/buffer.h"
#include "libavutil/channel_layout.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


 The codec does not modify any global variables in the init function, allowing to call the init function without locking any global mutexes.
#define FF_CODEC_CAP_INIT_CLEANUP   (1 << 1)
 The codec allows calling the close function for deallocation even if the init function returned a failure.
#define ff_dlog(ctx,...)   do { if (0) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)
#define ff_tlog(ctx,...)   while(0)
#define FF_SIGNBIT(x)   ((x) >> CHAR_BIT * sizeof(x) - 1)
#define STRIDE_ALIGN   8
 Maximum size in bytes of extradata.


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, const AVCodec *codec)
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 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 *p, const uint8_t *end, uint32_t *state)
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.
int ff_get_format (AVCodecContext *avctx, const enum AVPixelFormat *fmt)
 Select the (possibly hardware accelerated) pixel format.
int ff_decode_frame_props (AVCodecContext *avctx, AVFrame *frame)
 Set various frame properties from the codec context / packet data.


const uint8_t ff_log2_run [41]
volatile int ff_avcodec_locked

Detailed Description

common internal api header.

Definition in file internal.h.

Macro Definition Documentation


The codec does not modify any global variables in the init function, allowing to call the init function without locking any global mutexes.

Definition at line 40 of file internal.h.

Referenced by ff_lock_avcodec().

#define FF_CODEC_CAP_INIT_CLEANUP   (1 << 1)

The codec allows calling the close function for deallocation even if the init function returned a failure.

Without this capability flag, a codec does such cleanup internally when returning failures from the init function and does not expect the close function to be called at all.

Definition at line 48 of file internal.h.

#define ff_dlog (   ctx,
)    do { if (0) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0)

Definition at line 54 of file internal.h.

Referenced by avpriv_mpegaudio_decode_header(), build_table(), compute_bit_allocation(), compute_scale_factors(), create_map(), dca_decode_frame(), dca_subframe_header(), decode(), decode_audio_specific_config(), decode_band(), decode_coeffs(), decode_dvd_subtitles(), decode_frame(), decode_frame_headers(), decode_idat_chunk(), decode_init(), decode_init_static(), decode_line(), decode_packet(), decode_pic_hdr(), decode_rle(), decode_slice(), decode_subframe(), decode_tilehdr(), dnxhd_decode_frame(), dnxhd_decode_header(), dprint_options(), dprint_specific_config(), dump_cook_context(), dv_decode_ac(), dv_decode_video_segment(), dvbsub_decode(), dvbsub_parse(), dvbsub_parse_clut_segment(), dvbsub_parse_page_segment(), dvbsub_parse_pixel_data_block(), dvbsub_parse_region_segment(), dvdsub_decode(), encode_bitstream(), encode_line(), encode_picture(), encode_thread(), escape130_decode_frame(), ff_combine_frame(), ff_estimate_b_frame_motion(), ff_h263_decode_picture_header(), ff_jpegls_decode_lse(), ff_jpegls_reset_coding_parameters(), ff_mjpeg_decode_sof(), ff_mpv_frame_start(), ff_msmpeg4_decode_block(), ff_msmpeg4_decode_picture_header(), ff_msmpeg4_encode_picture_header(), ff_rate_estimate_qscale(), ff_vaapi_common_end_frame(), ff_vbv_update(), ff_vc1_parse_frame_header(), ff_wma_init(), ff_wmv2_decode_mb(), find_marker(), flashsv_decode_frame(), flashsv_encode_frame(), flic_decode_frame_15_16BPP(), get_vlc_symbol(), gif_read_extension(), gif_read_header1(), gif_read_image(), h261_decode_frame(), huffman_decode(), init_pass2(), ivi_decode_coded_blocks(), load_input_picture(), mjpeg_decode_scan(), modify_qscale(), mp3lame_encode_frame(), mp_decode_layer2(), mp_decode_layer3(), MPA_encode_init(), mpeg_decode_picture_coding_extension(), mpeg_decode_postinit(), mpeg_decode_quant_matrix_extension(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), mpegvideo_parse(), msmpeg4v2_decode_motion(), msmpeg4v34_decode_mb(), parse_palette_segment(), parse_presentation_segment(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_dvd_parse_header(), put_vlc_symbol(), read_header(), read_huffman_tree(), realloc_buffer(), rv10_decode_frame(), rv10_decode_packet(), rv10_decode_picture_header(), setup_classifs(), slice_decode_thread(), svq1_decode_block_intra(), svq1_decode_block_non_intra(), svq1_decode_delta_block(), svq1_decode_frame(), svq1_decode_frame_header(), vaapi_h264_decode_slice(), vaapi_h264_end_frame(), vaapi_h264_start_frame(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), vaapi_vc1_start_frame(), vc1_decode_frame(), vorbis_decode_frame(), vorbis_floor0_decode(), vorbis_floor1_decode(), vorbis_parse_audio_packet(), vorbis_parse_id_hdr(), vorbis_parse_setup_hdr_codebooks(), vorbis_parse_setup_hdr_floors(), vorbis_parse_setup_hdr_mappings(), vorbis_parse_setup_hdr_modes(), vorbis_parse_setup_hdr_residues(), vorbis_parse_setup_hdr_tdtransforms(), vorbis_residue_decode_internal(), and wma_decode_superframe().

#define ff_tlog (   ctx,
)    while(0)

Definition at line 64 of file internal.h.

Referenced by avcodec_open2(), and ff_init_buffer_info().

#define FF_SIGNBIT (   x)    ((x) >> CHAR_BIT * sizeof(x) - 1)

Definition at line 66 of file internal.h.

Referenced by dnxhd_10bit_dct_quantize(), inter_predict(), mv_pred_direct(), and scale_mv().

#define STRIDE_ALIGN   8

Definition at line 73 of file internal.h.

Referenced by avcodec_align_dimensions2(), load_input_picture(), and update_frame_pool().


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 199 of file internal.h.

Referenced by avcodec_open2(), and avformat_find_stream_info().

Function Documentation

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 3525 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)
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 738 of file utils.c.

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

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

Definition at line 692 of file utils.c.

Referenced by h264_frame_start().

int ff_lock_avcodec ( AVCodecContext log_ctx,
const AVCodec codec 

Definition at line 3610 of file utils.c.

Referenced by avcodec_open2(), and ff_codec_open2_recursive().

int ff_unlock_avcodec ( void  )

Definition at line 3634 of file utils.c.

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

int avpriv_lock_avformat ( void  )

Definition at line 3647 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 3656 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.

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
non negative on success, negative error code on failure

Definition at line 1727 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_apng(), encode_frame(), encode_nals(), encode_picture_ls(), encode_png(), 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(), process_output_surface(), 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 av_always_inline int64_t ff_samples_to_time_base ( AVCodecContext avctx,
int64_t  samples 
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 1031 of file utils.c.

Referenced by ac3_decode_frame(), adpcm_decode_frame(), adx_decode_frame(), aic_decode_frame(), alloc_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(), dcadec_decode_frame(), decode_frame(), decode_pic(), decode_tag(), decode_thread(), dfa_decode_frame(), dpcm_decode_frame(), dss_sp_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_twinvq_decode_frame(), ff_vp56_decode_frame(), ffmal_copy_frame(), frame_configure_elements(), g2m_decode_frame(), g722_decode_frame(), g723_1_decode_frame(), get_buffer(), get_buffer_with_edge(), gif_decode_frame(), gsm_decode_frame(), hnm_decode_frame(), hq_decode_frame(), hqa_decode_frame(), hqx_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_frame(), submit_packet(), sunrast_decode_frame(), svq1_decode_frame(), svq1_encode_frame(), synth_superframe(), tdsc_decode_frame(), 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().

int ff_reget_buffer ( AVCodecContext avctx,
AVFrame frame 
int ff_thread_can_start_frame ( AVCodecContext avctx)

Definition at line 746 of file pthread_frame.c.

Referenced by ff_mpv_frame_start(), and h264_frame_start().

int avpriv_h264_has_num_reorder_frames ( AVCodecContext avctx)

Definition at line 56 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 1314 of file utils.c.

Referenced by smvjpeg_decode_init(), and tdsc_init().

int avpriv_bprint_to_extradata ( AVCodecContext avctx,
struct AVBPrint *  buf 

Finalize buf into extradata and set its size appropriately.

Definition at line 3774 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 
int ff_set_dimensions ( AVCodecContext s,
int  width,
int  height 
int ff_set_sar ( AVCodecContext avctx,
AVRational  sar 
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 259 of file utils.c.

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

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 1194 of file utils.c.

Referenced by decode_init(), ff_thread_get_format(), ffmmal_init_decoder(), h263_get_format(), qsv_process_data(), submit_packet(), and vc1_decode_init().

int ff_decode_frame_props ( AVCodecContext avctx,
AVFrame frame 

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

Definition at line 864 of file utils.c.

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

Variable Documentation

const uint8_t ff_log2_run[41]

Definition at line 39 of file bitstream.c.

Referenced by decode_line(), encode_line(), ls_decode_line(), ls_encode_line(), and ls_encode_run().

volatile int ff_avcodec_locked

Definition at line 120 of file utils.c.

Referenced by ff_lock_avcodec(), and ff_unlock_avcodec().