libavcodec/utils.c File Reference

utils. More...

#include "libavutil/avstring.h"
#include "libavutil/integer.h"
#include "libavutil/crc.h"
#include "avcodec.h"
#include "dsputil.h"
#include "opt.h"
#include "imgconvert.h"
#include "audioconvert.h"
#include "internal.h"
#include <stdlib.h>
#include <stdarg.h>
#include <limits.h>
#include <float.h>
#include <fcntl.h>

Go to the source code of this file.

Data Structures

struct  InternalBuffer
struct  VideoFrameSizeAbbr
struct  VideoFrameRateAbbr

Defines

#define _XOPEN_SOURCE   600
#define INTERNAL_BUFFER_SIZE   32
#define ALIGN(x, a)   (((x)+(a)-1)&~((a)-1))

Functions

void * av_fast_realloc (void *ptr, unsigned int *size, unsigned int min_size)
 Reallocates the given block if it is not large enough, otherwise it does nothing.
AVCodecav_codec_next (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.
void avcodec_register (AVCodec *codec)
 Register the codec codec and initialize libavcodec.
void register_avcodec (AVCodec *codec)
void avcodec_set_dimensions (AVCodecContext *s, int width, int height)
void avcodec_align_dimensions (AVCodecContext *s, int *width, int *height)
int avcodec_check_dimensions (void *av_log_ctx, unsigned int w, unsigned int h)
 Checks if the given dimension of a picture is valid, meaning that all bytes of the picture can be addressed with a signed int.
int avcodec_default_get_buffer (AVCodecContext *s, AVFrame *pic)
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)
enum PixelFormat avcodec_default_get_format (struct AVCodecContext *s, const enum PixelFormat *fmt)
void avcodec_get_frame_defaults (AVFrame *pic)
 Sets the fields of the given AVFrame to default values.
AVFrameavcodec_alloc_frame (void)
 Allocates an AVFrame and sets its fields to default values.
int attribute_align_arg avcodec_open (AVCodecContext *avctx, AVCodec *codec)
 Initializes the AVCodecContext to use the given AVCodec.
int attribute_align_arg avcodec_encode_audio (AVCodecContext *avctx, uint8_t *buf, int buf_size, const short *samples)
 Encodes an audio frame from samples into buf.
int attribute_align_arg avcodec_encode_video (AVCodecContext *avctx, uint8_t *buf, int buf_size, const AVFrame *pict)
 Encodes a video frame from pict into buf.
int avcodec_encode_subtitle (AVCodecContext *avctx, uint8_t *buf, int buf_size, const AVSubtitle *sub)
int attribute_align_arg avcodec_decode_video (AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const uint8_t *buf, int buf_size)
 Decodes a video frame from buf into picture.
int attribute_align_arg avcodec_decode_audio2 (AVCodecContext *avctx, int16_t *samples, int *frame_size_ptr, const uint8_t *buf, int buf_size)
 Decodes an audio frame from buf into samples.
int avcodec_decode_subtitle (AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, const uint8_t *buf, int buf_size)
int avcodec_close (AVCodecContext *avctx)
AVCodecavcodec_find_encoder (enum CodecID id)
 Finds a registered encoder with a matching codec ID.
AVCodecavcodec_find_encoder_by_name (const char *name)
 Finds a registered encoder with the specified name.
AVCodecavcodec_find_decoder (enum CodecID id)
 Finds a registered decoder with a matching codec ID.
AVCodecavcodec_find_decoder_by_name (const char *name)
 Finds a registered decoder with the specified name.
void avcodec_string (char *buf, int buf_size, AVCodecContext *enc, int encode)
unsigned avcodec_version (void)
 Returns the LIBAVCODEC_VERSION_INT constant.
void avcodec_init (void)
 Initializes libavcodec.
void avcodec_flush_buffers (AVCodecContext *avctx)
 Flush buffers, should be called when seeking or when switching to a different stream.
void avcodec_default_free_buffers (AVCodecContext *s)
char av_get_pict_type_char (int pict_type)
 Returns a single letter to describe the given picture type pict_type.
int av_get_bits_per_sample (enum CodecID codec_id)
 Returns codec bits per sample.
int av_get_bits_per_sample_format (enum SampleFormat sample_fmt)
 Returns sample format bits per sample.
int avcodec_thread_init (AVCodecContext *s, int thread_count)
unsigned int av_xiphlacing (unsigned char *s, unsigned int v)
int av_tempfile (char *prefix, char **filename)
int av_parse_video_frame_size (int *width_ptr, int *height_ptr, const char *str)
 Parses str and put in width_ptr and height_ptr the detected values.
int av_parse_video_frame_rate (AVRational *frame_rate, const char *arg)
 Parses str and put in frame_rate the detected values.
void ff_log_missing_feature (void *avc, const char *feature, int want_sample)
 Logs a generic warning message about a missing feature.
void ff_log_ask_for_sample (void *avc, const char *msg)
 Logs a generic warning message asking for a sample.
void av_register_hwaccel (AVHWAccel *hwaccel)
 Registers the hardware accelerator hwaccel.
AVHWAccelav_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.
AVHWAccelff_find_hwaccel (enum CodecID codec_id, enum PixelFormat pix_fmt)
 Returns the hardware accelerated codec for codec codec_id and pixel format pix_fmt.
int av_lockmgr_register (int(*cb)(void **mutex, enum AVLockOp op))
 Register a user provided lock manager supporting the operations specified by AVLockOp.

Variables

const uint8_t ff_reverse [256]
static int volatile entangled_thread_counter = 0
int(* ff_lockmgr_cb )(void **mutex, enum AVLockOp op)
static void * codec_mutex
static AVCodecfirst_avcodec = NULL
static const VideoFrameSizeAbbr video_frame_size_abbrs []
static const VideoFrameRateAbbr video_frame_rate_abbrs []
static AVHWAccelfirst_hwaccel = NULL


Detailed Description

utils.

Definition in file utils.c.


Define Documentation

#define _XOPEN_SOURCE   600

Definition at line 29 of file utils.c.

#define ALIGN ( x,
 )     (((x)+(a)-1)&~((a)-1))

Definition at line 128 of file utils.c.

#define INTERNAL_BUFFER_SIZE   32

Definition at line 126 of file utils.c.

Referenced by avcodec_default_free_buffers(), and avcodec_default_get_buffer().


Function Documentation

AVCodec* av_codec_next ( 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.

Definition at line 88 of file utils.c.

Referenced by show_formats().

void* av_fast_realloc ( void *  ptr,
unsigned int *  size,
unsigned int  min_size 
)

int av_get_bits_per_sample ( enum CodecID  codec_id  ) 

Returns codec bits per sample.

Parameters:
[in] codec_id the codec
Returns:
Number of bits per sample or zero if unknown for the given codec.

Definition at line 891 of file utils.c.

Referenced by av_find_stream_info(), av_write_header(), do_audio_out(), ff_alsa_open(), ff_audio_interleave_init(), get_aiff_header(), get_audio_frame_size(), gxf_packet(), mkv_write_tracks(), mov_read_stsd(), mov_write_header(), mxf_write_generic_sound_common(), pcm_decode_frame(), pcm_encode_frame(), pcm_encode_init(), and voc_get_packet().

int av_get_bits_per_sample_format ( enum SampleFormat  sample_fmt  ) 

Returns sample format bits per sample.

Parameters:
[in] sample_fmt the sample format
Returns:
Number of bits per sample or zero if unknown for the given sample format.

Definition at line 933 of file utils.c.

Referenced by audio_decode_frame(), av_audio_resample_init(), do_audio_out(), mkv_write_tracks(), and qdm2_decode_frame().

char av_get_pict_type_char ( int  pict_type  ) 

Returns a single letter to describe the given picture type pict_type.

Parameters:
[in] pict_type the picture type
Returns:
A single character representing the picture type.

Definition at line 878 of file utils.c.

Referenced by decode_mb_cavlc(), decode_slice_header(), do_video_stats(), ff_rate_estimate_qscale(), flv_h263_decode_picture_header(), show_pict_info(), and svq3_decode_frame().

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.

Definition at line 1163 of file utils.c.

Referenced by ff_find_hwaccel().

int av_lockmgr_register ( int(*)(void **mutex, enum AVLockOp op)  cb  ) 

Register a user provided lock manager supporting the operations specified by AVLockOp.

mutex points to a (void *) where the lockmgr should store/get a pointer to a user allocated mutex. It's NULL upon AV_LOCK_CREATE and != NULL for all other ops.

Parameters:
cb User defined callback. Note: FFmpeg may invoke calls to this callback during the call to av_lockmgr_register(). Thus, the application must be prepared to handle that. If cb is set to NULL the lockmgr will be unregistered. Also note that during unregistration the previously registered lockmgr callback may also be invoked.

Definition at line 1180 of file utils.c.

int av_parse_video_frame_rate ( AVRational frame_rate,
const char *  str 
)

Parses str and put in frame_rate the detected values.

Returns:
0 in case of a successful parsing, a negative value otherwise
Parameters:
[in] str the string to parse: it has to be a string in the format <frame_rate_num>/<frame_rate_den>, a float number or a valid video rate abbreviation
[in,out] frame_rate pointer to the AVRational which will contain the detected frame rate

Definition at line 1093 of file utils.c.

Referenced by opt_frame_rate(), parse_ffconfig(), and parse_frame_rate().

int av_parse_video_frame_size ( int *  width_ptr,
int *  height_ptr,
const char *  str 
)

Parses str and put in width_ptr and height_ptr the detected values.

Returns:
0 in case of a successful parsing, a negative value otherwise
Parameters:
[in] str the string to parse: it has to be a string in the format <width>x<height> or a valid video frame size abbreviation.
[in,out] width_ptr pointer to the variable which will contain the detected frame width value
[in,out] height_ptr pointer to the variable which will contain the detected frame height value

Definition at line 1065 of file utils.c.

Referenced by opt_frame_size(), parse_ffconfig(), and parse_image_size().

void av_register_hwaccel ( AVHWAccel hwaccel  ) 

Registers the hardware accelerator hwaccel.

Definition at line 1154 of file utils.c.

int av_tempfile ( char *  prefix,
char **  filename 
)

Definition at line 974 of file utils.c.

Referenced by ff_xvid_encode_init(), and ff_xvid_rate_control_init().

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

Definition at line 955 of file utils.c.

Referenced by fixup_vorbis_headers(), oggvorbis_encode_init(), and put_main_header().

void avcodec_align_dimensions ( AVCodecContext s,
int *  width,
int *  height 
)

Definition at line 130 of file utils.c.

Referenced by avcodec_default_get_buffer().

AVFrame* avcodec_alloc_frame ( void   ) 

Allocates an AVFrame and sets its fields to default values.

The resulting struct can be deallocated by simply calling av_free().

Returns:
An AVFrame filled with default values or NULL on failure.
See also:
avcodec_get_frame_defaults

Definition at line 411 of file utils.c.

Referenced by AC3_encode_init(), adx_encode_init(), alac_encode_init(), alloc_picture(), encode_init(), Faac_encode_init(), flac_encode_init(), g726_init(), get_watermark_picture(), libgsm_init(), MP3lame_encode_init(), MPA_encode_init(), oggvorbis_encode_init(), pcm_encode_init(), roq_dpcm_encode_init(), video_decode_example(), video_encode_example(), video_thread(), and vorbis_encode_init().

int avcodec_check_dimensions ( void *  av_log_ctx,
unsigned int  w,
unsigned int  h 
)

int avcodec_close ( AVCodecContext avctx  ) 

int attribute_align_arg avcodec_decode_audio2 ( AVCodecContext avctx,
int16_t *  samples,
int *  frame_size_ptr,
const uint8_t *  buf,
int  buf_size 
)

Decodes an audio frame from buf into samples.

The avcodec_decode_audio2() function decodes an audio frame from the input buffer buf of size buf_size. To decode it, it makes use of the audio codec which was coupled with avctx using avcodec_open(). The resulting decoded frame is stored in output buffer samples. If no frame could be decompressed, frame_size_ptr is zero. Otherwise, it is the decompressed frame size in bytes.

Warning:
You must set frame_size_ptr to the allocated size of the output buffer before calling avcodec_decode_audio2().

The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than the actual read bytes because some optimized bitstream readers read 32 or 64 bits at once and could read over the end.

The end of the input buffer buf should be set to 0 to ensure that no overreading happens for damaged MPEG streams.

Note:
You might have to align the input buffer buf and output buffer samples. The alignment requirements depend on the CPU: On some CPUs it isn't necessary at all, on others it won't work at all if not aligned and on others it will work but it will have an impact on performance. In practice, the bitstream should have 4 byte alignment at minimum and all sample data should be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If the linesize is not a multiple of 16 then there's no sense in aligning the start of the buffer to 16.
Parameters:
avctx the codec context
[out] samples the output buffer
[in,out] frame_size_ptr the output buffer size in bytes
[in] buf the input buffer
[in] buf_size the input buffer size in bytes
Returns:
On error a negative value is returned, otherwise the number of bytes used or zero if no frame could be decompressed.

Definition at line 555 of file utils.c.

Referenced by audio_decode_frame(), output_packet(), and try_decode_frame().

int avcodec_decode_subtitle ( AVCodecContext avctx,
AVSubtitle sub,
int *  got_sub_ptr,
const uint8_t *  buf,
int  buf_size 
)

Definition at line 583 of file utils.c.

Referenced by output_packet(), and subtitle_thread().

int attribute_align_arg avcodec_decode_video ( AVCodecContext avctx,
AVFrame picture,
int *  got_picture_ptr,
const uint8_t *  buf,
int  buf_size 
)

Decodes a video frame from buf into picture.

The avcodec_decode_video() function decodes a video frame from the input buffer buf of size buf_size. To decode it, it makes use of the video codec which was coupled with avctx using avcodec_open(). The resulting decoded frame is stored in picture.

Warning:
The input buffer must be FF_INPUT_BUFFER_PADDING_SIZE larger than the actual read bytes because some optimized bitstream readers read 32 or 64 bits at once and could read over the end.

The end of the input buffer buf should be set to 0 to ensure that no overreading happens for damaged MPEG streams.

Note:
You might have to align the input buffer buf and output buffer samples. The alignment requirements depend on the CPU: on some CPUs it isn't necessary at all, on others it won't work at all if not aligned and on others it will work but it will have an impact on performance. In practice, the bitstream should have 4 byte alignment at minimum and all sample data should be 16 byte aligned unless the CPU doesn't need it (AltiVec and SSE do). If the linesize is not a multiple of 16 then there's no sense in aligning the start of the buffer to 16.

Some codecs have a delay between input and output, these need to be feeded with buf=NULL, buf_size=0 at the end to return the remaining frames.

Parameters:
avctx the codec context
[out] picture The AVFrame in which the decoded video frame will be stored.
[in] buf the input buffer
[in] buf_size the size of the input buffer in bytes
[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
Returns:
On error a negative value is returned, otherwise the number of bytes used or zero if no frame could be decompressed.

Definition at line 532 of file utils.c.

Referenced by get_watermark_picture(), output_packet(), try_decode_frame(), video_decode_example(), and video_thread().

int avcodec_default_execute ( AVCodecContext c,
int(*)(AVCodecContext *c2, void *arg2)  func,
void *  arg,
int *  ret,
int  count,
int  size 
)

Definition at line 388 of file utils.c.

Referenced by avcodec_get_context_defaults2().

void avcodec_default_free_buffers ( AVCodecContext s  ) 

Definition at line 861 of file utils.c.

Referenced by avcodec_close(), and MPV_common_end().

int avcodec_default_get_buffer ( AVCodecContext s,
AVFrame pic 
)

Definition at line 199 of file utils.c.

Referenced by avcodec_get_context_defaults2().

enum PixelFormat avcodec_default_get_format ( struct AVCodecContext s,
const enum PixelFormat fmt 
)

Definition at line 398 of file utils.c.

Referenced by avcodec_get_context_defaults2().

int avcodec_default_reget_buffer ( AVCodecContext s,
AVFrame pic 
)

Definition at line 356 of file utils.c.

Referenced by avcodec_get_context_defaults2().

void avcodec_default_release_buffer ( AVCodecContext s,
AVFrame pic 
)

Definition at line 327 of file utils.c.

Referenced by avcodec_get_context_defaults2().

int attribute_align_arg avcodec_encode_audio ( AVCodecContext avctx,
uint8_t *  buf,
int  buf_size,
const short *  samples 
)

Encodes an audio frame from samples into buf.

The avcodec_encode_audio() function encodes an audio frame from the input buffer samples. To encode it, it makes use of the audio codec which was coupled with avctx using avcodec_open(). The resulting encoded frame is stored in output buffer buf.

Note:
The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
Parameters:
avctx the codec context
[out] buf the output buffer
[in] buf_size the output buffer size
[in] samples the input buffer containing the samples The number of samples read from this buffer is frame_size*channels, both of which are defined in avctx. For PCM audio the number of samples read from samples is equal to buf_size * input_sample_size / output_sample_size.
Returns:
On error a negative value is returned, on success zero or the number of bytes used to encode the data read from the input buffer.

Definition at line 483 of file utils.c.

Referenced by audio_encode_example(), do_audio_out(), output_packet(), and write_audio_frame().

int avcodec_encode_subtitle ( AVCodecContext avctx,
uint8_t *  buf,
int  buf_size,
const AVSubtitle sub 
)

Definition at line 517 of file utils.c.

Referenced by do_subtitle_out().

int attribute_align_arg avcodec_encode_video ( AVCodecContext avctx,
uint8_t *  buf,
int  buf_size,
const AVFrame pict 
)

Encodes a video frame from pict into buf.

The avcodec_encode_video() function encodes a video frame from the input pict. To encode it, it makes use of the video codec which was coupled with avctx using avcodec_open(). The resulting encoded bytes representing the frame are stored in the output buffer buf. The input picture should be stored using a specific format, namely avctx.pix_fmt.

Parameters:
avctx the codec context
[out] buf the output buffer for the bitstream of encoded frame
[in] buf_size the size of the output buffer in bytes
[in] pict the input picture to encode
Returns:
On error a negative value is returned, on success zero or the number of bytes used from the output buffer.

Definition at line 498 of file utils.c.

Referenced by do_video_out(), estimate_best_b_count(), output_packet(), video_encode_example(), and write_video_frame().

AVCodec* avcodec_find_decoder ( enum CodecID  id  ) 

Finds a registered decoder with a matching codec ID.

Parameters:
id CodecID of the requested decoder
Returns:
A decoder if one was found, NULL otherwise.

Definition at line 654 of file utils.c.

Referenced by audio_decode_example(), av_encode(), avcodec_string(), get_watermark_picture(), open_parser(), sdp_parse_rtpmap(), stream_component_open(), try_decode_frame(), and video_decode_example().

AVCodec* avcodec_find_decoder_by_name ( const char *  name  ) 

Finds a registered decoder with the specified name.

Parameters:
name name of the requested decoder
Returns:
A decoder if one was found, NULL otherwise.

Definition at line 666 of file utils.c.

Referenced by find_codec_or_die(), and opt_input_file().

AVCodec* avcodec_find_encoder ( enum CodecID  id  ) 

Finds a registered encoder with a matching codec ID.

Parameters:
id CodecID of the requested encoder
Returns:
An encoder if one was found, NULL otherwise.

Definition at line 628 of file utils.c.

Referenced by asf_write_header1(), audio_encode_example(), av_encode(), avcodec_string(), compute_status(), estimate_best_b_count(), new_audio_stream(), new_video_stream(), open_audio(), open_video(), and video_encode_example().

AVCodec* avcodec_find_encoder_by_name ( const char *  name  ) 

Finds a registered encoder with the specified name.

Parameters:
name name of the requested encoder
Returns:
An encoder if one was found, NULL otherwise.

Definition at line 640 of file utils.c.

Referenced by find_codec_or_die(), new_audio_stream(), new_subtitle_stream(), new_video_stream(), opt_audio_codec(), and opt_video_codec().

void avcodec_flush_buffers ( AVCodecContext avctx  ) 

Flush buffers, should be called when seeking or when switching to a different stream.

Definition at line 855 of file utils.c.

Referenced by audio_decode_frame(), subtitle_thread(), and video_thread().

void avcodec_get_frame_defaults ( AVFrame pic  ) 

Sets the fields of the given AVFrame to default values.

Parameters:
pic The AVFrame of which the fields should be set to default values.

Definition at line 404 of file utils.c.

Referenced by av_encode(), avcodec_alloc_frame(), bmp_decode_init(), bmp_encode_init(), common_init(), do_video_out(), encode_init(), estimate_best_b_count(), gif_decode_init(), output_packet(), pcx_init(), png_dec_init(), png_enc_init(), ptx_init(), sgi_init(), sunrast_init(), targa_encode_init(), targa_init(), tiff_init(), and txd_init().

void avcodec_init ( void   ) 

Initializes libavcodec.

Warning:
This function must be called before any other libavcodec function.

Definition at line 844 of file utils.c.

Referenced by avcodec_register(), and main().

int attribute_align_arg avcodec_open ( AVCodecContext avctx,
AVCodec codec 
)

Initializes the AVCodecContext to use the given AVCodec.

Prior to using this function the context has to be allocated.

The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(), avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for retrieving a codec.

Warning:
This function is not thread safe!
 avcodec_register_all();
 codec = avcodec_find_decoder(CODEC_ID_H264);
 if (!codec)
     exit(1);

 context = avcodec_alloc_context();

 if (avcodec_open(context, codec) < 0)
     exit(1);

Parameters:
avctx The context which will be set up to use the given codec.
codec The codec to use within the context.
Returns:
zero on success, a negative value on error
See also:
avcodec_alloc_context, avcodec_find_decoder, avcodec_find_encoder

Definition at line 421 of file utils.c.

Referenced by audio_decode_example(), audio_encode_example(), av_encode(), estimate_best_b_count(), get_watermark_picture(), open_audio(), open_parser(), open_video(), stream_component_open(), try_decode_frame(), video_decode_example(), and video_encode_example().

void avcodec_register ( AVCodec codec  ) 

Register the codec codec and initialize libavcodec.

See also:
avcodec_init()

Definition at line 93 of file utils.c.

Referenced by register_avcodec().

void avcodec_set_dimensions ( AVCodecContext s,
int  width,
int  height 
)

void avcodec_string ( char *  buf,
int  buf_size,
AVCodecContext enc,
int  encode 
)

Definition at line 680 of file utils.c.

Referenced by av_find_stream_info(), compute_status(), and dump_stream_format().

int avcodec_thread_init ( AVCodecContext s,
int  thread_count 
)

Definition at line 950 of file utils.c.

unsigned avcodec_version ( void   ) 

Returns the LIBAVCODEC_VERSION_INT constant.

Definition at line 839 of file utils.c.

AVHWAccel* ff_find_hwaccel ( enum CodecID  codec_id,
enum PixelFormat  pix_fmt 
)

Returns 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 1168 of file utils.c.

Referenced by decode_init(), ff_h263_decode_init(), and vcr2_init_sequence().

void ff_log_ask_for_sample ( void *  avc,
const char *  msg 
)

Logs a generic warning message asking for a sample.

Parameters:
[in] avc a pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct
[in] msg string containing an optional message, or NULL if no message

Definition at line 1143 of file utils.c.

Referenced by determine_bitrate(), and ff_log_missing_feature().

void ff_log_missing_feature ( void *  avc,
const char *  feature,
int  want_sample 
)

Logs a generic warning message about a missing feature.

Parameters:
[in] avc a pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct
[in] feature string containing the name of the missing feature
[in] want_sample indicates if samples are wanted which exhibit this feature. If want_sample is non-zero, additional verbage will be added to the log message which tells the user how to report samples to the development mailing list.

Definition at line 1131 of file utils.c.

Referenced by aac_decode_init(), apply_gain_ctrl(), decode_audio_block(), decode_extradata(), decode_ga_specific_config(), decode_ics(), decode_ics_info(), decode_sbr_extension(), ff_eac3_parse_header(), and parse_adts_frame_header().

void register_avcodec ( AVCodec codec  ) 

Deprecated:
Deprecated in favor of avcodec_register().

Definition at line 104 of file utils.c.


Variable Documentation

void* codec_mutex [static]

Definition at line 69 of file utils.c.

Referenced by av_lockmgr_register(), avcodec_close(), and avcodec_open().

int volatile entangled_thread_counter = 0 [static]

Definition at line 67 of file utils.c.

Referenced by avcodec_close(), and avcodec_open().

int(* ff_lockmgr_cb)(void **mutex, enum AVLockOp op)

const uint8_t ff_reverse[256]

Initial value:

{
0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
}

Definition at line 48 of file utils.c.

Referenced by asv2_get_bits(), asv2_put_bits(), decode_frame(), fft(), ir2_decode_frame(), pcm_decode_frame(), pcm_encode_frame(), tiff_unpack_strip(), and wnv1_get_code().

AVCodec* first_avcodec = NULL [static]

Definition at line 86 of file utils.c.

AVHWAccel* first_hwaccel = NULL [static]

Definition at line 1152 of file utils.c.

Initial value:

 {
    { "ntsc",      30000, 1001 },
    { "pal",          25,    1 },
    { "qntsc",     30000, 1001 }, 
    { "qpal",         25,    1 }, 
    { "sntsc",     30000, 1001 }, 
    { "spal",         25,    1 }, 
    { "film",         24,    1 },
    { "ntsc-film", 24000, 1001 },
}

Definition at line 1054 of file utils.c.

Definition at line 1015 of file utils.c.


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