internal.h File Reference

common internal api header. More...

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

Go to the source code of this file.

Data Structures

struct  InternalBuffer
 
struct  AVCodecInternal
 
struct  AVCodecDefault
 

Macros

#define FF_SANE_NB_CHANNELS   128U
 
#define FF_MAX_EXTRADATA_SIZE   ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
 Maximum size in bytes of extradata. More...
 

Typedefs

typedef struct InternalBuffer InternalBuffer
 
typedef struct AVCodecInternal AVCodecInternal
 

Functions

AVHWAccelff_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 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...
 
unsigned int avpriv_toupper4 (unsigned int x)
 
int avpriv_lock_avformat (void)
 
int avpriv_unlock_avformat (void)
 
int ff_alloc_packet (AVPacket *avpkt, int size)
 Check AVPacket size and/or allocate data. More...
 
static av_always_inline int64_t ff_samples_to_time_base (AVCodecContext *avctx, int64_t samples)
 Rescale from sample rate to AVCodecContext.time_base. More...
 
int ff_get_buffer (AVCodecContext *avctx, AVFrame *frame)
 Get a buffer for a frame. More...
 

Detailed Description

common internal api header.

Definition in file internal.h.

Macro Definition Documentation

#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 117 of file internal.h.

Referenced by avcodec_open2(), and avformat_find_stream_info().

#define FF_SANE_NB_CHANNELS   128U

Definition at line 33 of file internal.h.

Referenced by avcodec_open2().

Typedef Documentation

Function Documentation

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.

Parameters
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 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.

Parameters
codec_idthe codec to match
pix_fmtthe pixel format to match
Returns
the hardware accelerated codec, or NULL if none was found.

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(), 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().

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