Utility functions
[Encoding/Decoding Library]

Miscellaneous utility functions related to both encoding and decoding (or neither). More...

Data Structures

struct AVBitStreamFilterContext

struct AVBitStreamFilter

Modules

Pixel formats

Functions for working with pixel formats.

FFT functions

Enumerations

enum AVLockOp { AV_LOCK_CREATE, AV_LOCK_OBTAIN, AV_LOCK_RELEASE, AV_LOCK_DESTROY }

Lock operation used by lockmgr. More...

Functions

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

size_t av_get_codec_tag_string (char *buf, size_t buf_size, unsigned int codec_tag)

Put a string representing the codec tag codec_tag in buf.

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

const char * av_get_profile_name (const AVCodec *codec, int profile)

Return a name for the specified profile, if available.

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

int avcodec_default_execute2 (AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2, int, int), void *arg, int *ret, int count)

int avcodec_fill_audio_frame (AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align)

Fill audio frame data and linesize.

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)

int av_get_bits_per_sample (enum CodecID codec_id)

Return codec bits per sample.

enum CodecID av_get_pcm_codec (enum AVSampleFormat fmt, int be)

Return the PCM codec associated with a sample format.

int av_get_exact_bits_per_sample (enum CodecID codec_id)

Return codec bits per sample.

int av_get_audio_frame_duration (AVCodecContext *avctx, int frame_bytes)

Return audio frame duration.

void av_register_bitstream_filter (AVBitStreamFilter *bsf)

AVBitStreamFilterContext * av_bitstream_filter_init (const char *name)

int av_bitstream_filter_filter (AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)

void av_bitstream_filter_close (AVBitStreamFilterContext *bsf)

AVBitStreamFilter * av_bitstream_filter_next (AVBitStreamFilter *f)

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

Reallocate the given block if it is not large enough, otherwise do nothing.

void av_fast_malloc (void *ptr, unsigned int *size, size_t min_size)

Allocate a buffer, reusing the given one if large enough.

void av_fast_padded_malloc (void *ptr, unsigned int *size, size_t min_size)

Same behaviour av_fast_malloc but the buffer has additional FF_INPUT_PADDING_SIZE at the end which will will always be 0.

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

Encode extradata length to a buffer.

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

Log a generic warning message about a missing feature.

void av_log_ask_for_sample (void *avc, const char *msg,...) av_printf_format(2

Log a generic warning message asking for a sample.

void void av_register_hwaccel (AVHWAccel *hwaccel)

Register the hardware accelerator hwaccel.

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.

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

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

enum AVMediaType avcodec_get_type (enum CodecID codec_id)

Get the type of the given codec.

const char * avcodec_get_name (enum CodecID id)

Get the name of a codec.

int avcodec_is_open (AVCodecContext *s)

int av_codec_is_encoder (AVCodec *codec)

int av_codec_is_decoder (AVCodec *codec)

Detailed Description

Miscellaneous utility functions related to both encoding and decoding (or neither).

Enumeration Type Documentation

enum AVLockOp

Lock operation used by lockmgr.

Enumerator:

AV_LOCK_CREATE	Create a mutex.
AV_LOCK_OBTAIN	Lock the mutex.
AV_LOCK_RELEASE	Unlock the mutex.
AV_LOCK_DESTROY	Free mutex resources.

Definition at line 4641 of file avcodec.h.

Function Documentation

void av_bitstream_filter_close ( AVBitStreamFilterContext * bsf )

Definition at line 50 of file bitstream_filter.c.

Referenced by exit_program(), Stagefright_close(), Stagefright_init(), and uninit().

int av_bitstream_filter_filter	(	AVBitStreamFilterContext *	bsfc,
		AVCodecContext *	avctx,
		const char *	args,
		uint8_t **	poutbuf,
		int *	poutbuf_size,
		const uint8_t *	buf,
		int	buf_size,
		int	keyframe
	)

Definition at line 58 of file bitstream_filter.c.

Referenced by decode(), init(), Stagefright_decode_frame(), and write_frame().

AVBitStreamFilterContext* av_bitstream_filter_init ( const char * name )

Definition at line 35 of file bitstream_filter.c.

Referenced by init(), new_output_stream(), and Stagefright_init().

AVBitStreamFilter* av_bitstream_filter_next ( AVBitStreamFilter * f )

Definition at line 25 of file bitstream_filter.c.

Referenced by opt_bsfs().

int av_codec_is_decoder ( AVCodec * codec )

Returns:: a non-zero number if codec is a decoder, zero otherwise

Definition at line 126 of file utils.c.

Referenced by avcodec_find_decoder(), avcodec_find_decoder_by_name(), avcodec_open2(), and opt_codecs().

int av_codec_is_encoder ( AVCodec * codec )

Returns:: a non-zero number if codec is an encoder, zero otherwise

Definition at line 121 of file utils.c.

Referenced by avcodec_close(), avcodec_find_encoder(), avcodec_find_encoder_by_name(), avcodec_open2(), and opt_codecs().

void av_fast_malloc	(	void *	ptr,
		unsigned int *	size,
		size_t	min_size
	)

Allocate a buffer, reusing the given one if large enough.

Contrary to av_fast_realloc the current buffer contents might not be preserved and on error the old buffer is freed, thus no special handling to avoid memleaks is necessary.

Parameters:

	ptr	pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
	size	size of the buffer *ptr points to
	min_size	minimum size of ptr buffer after returning, ptr will be NULL and *size 0 if an error occurred.

Definition at line 85 of file utils.c.

Referenced by ape_decode_frame(), codec_reinit(), decode_frame(), decode_i_frame(), decode_p_frame(), ff_h263_decode_frame(), ff_id3v2_parse(), ff_mpeg_update_thread_context(), ljpeg_decode_rgb_scan(), mp_decode_frame(), parse_picture_segment(), pmp_packet(), spdif_header_dts4(), spdif_write_packet(), submit_packet(), svq3_decode_frame(), truemotion1_decode_header(), and truemotion1_decode_init().

void av_fast_padded_malloc	(	void *	ptr,
		unsigned int *	size,
		size_t	min_size
	)

Same behaviour av_fast_malloc but the buffer has additional FF_INPUT_PADDING_SIZE at the end which will will always be 0.

In addition the whole buffer will initially and after resizes be 0-initialized so that no uninitialized data will ever appear.

Definition at line 90 of file utils.c.

Referenced by cdxl_decode_frame(), decode_frame(), ff_alloc_packet2(), ff_h264_decode_nal(), ff_mjpeg_find_marker(), mimic_decode_frame(), mpc7_decode_frame(), and tqi_decode_frame().

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

Reallocate the given block if it is not large enough, otherwise do nothing.

See also:: av_realloc

Definition at line 56 of file utils.c.

Referenced by caf_write_packet(), commit_slices(), decode_frame(), decode_slice(), dirac_combine_frame(), ff_add_index_entry(), ff_af_queue_add(), ff_combine_frame(), ff_mms_asf_header_parser(), ff_vaapi_alloc_slice(), ff_vdpau_add_data_chunk(), flac_fifo_read_wrap(), get_stats(), mkv_copy_packet(), mxg_update_cache(), read_frame(), read_header(), shorten_decode_frame(), and spdif_header_eac3().

int av_get_audio_frame_duration	(	AVCodecContext *	avctx,
		int	frame_bytes
	)

Return audio frame duration.

Parameters:

	avctx	codec context
	frame_bytes	size of the frame, or 0 if unknown

Returns:: frame duration, in samples, if known. 0 if not able to determine.

Definition at line 2068 of file utils.c.

Referenced by ff_parse_specific_params(), get_aiff_header(), get_audio_frame_size(), rtp_write_header(), and swf_write_audio().

int av_get_bits_per_sample ( enum CodecID codec_id )

Return 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 2050 of file utils.c.

Referenced by adpcm_encode_init(), aiff_write_header(), au_read_header(), au_read_packet(), avcodec_encode_audio(), avformat_write_header(), caf_write_header(), ff_alsa_open(), ff_audio_interleave_init(), ff_mov_read_stsd_entries(), ff_pcm_read_seek(), ff_raw_read_header(), ff_voc_get_packet(), get_aiff_header(), get_bit_rate(), gxf_packet(), mkv_write_tracks(), mov_get_codec_tag(), mov_write_audio_tag(), mov_write_header(), mxf_write_generic_sound_common(), oma_read_header(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), pulse_read_header(), raw_read_packet(), read_header(), rso_read_header(), rso_read_packet(), show_stream(), and smjpeg_write_header().

size_t av_get_codec_tag_string	(	char *	buf,
		size_t	buf_size,
		unsigned int	codec_tag
	)

Put a string representing the codec tag codec_tag in buf.

Parameters:

buf_size

size in bytes of buf

Returns:: the length of the string that would have been generated if enough space had been available, excluding the trailing null

Definition at line 1773 of file utils.c.

Referenced by avcodec_string(), avformat_write_header(), and show_stream().

int av_get_exact_bits_per_sample ( enum CodecID codec_id )

Return codec bits per sample.

Only return non-zero if the bits per sample is exactly correct, not an approximation.

Parameters:

[in] codec_id the codec

Returns:: Number of bits per sample or zero if unknown for the given codec.

Definition at line 1986 of file utils.c.

Referenced by av_get_audio_frame_duration(), and av_get_bits_per_sample().

enum CodecID av_get_pcm_codec	(	enum AVSampleFormat	fmt,
		int	be
	)

Return the PCM codec associated with a sample format.

Parameters:

be

endianness, 0 for little, 1 for big, -1 (or anything else) for native

Returns:: CODEC_ID_PCM_* or CODEC_ID_NONE

Definition at line 2029 of file utils.c.

Referenced by lavfi_read_header().

const char* av_get_profile_name	(	const AVCodec *	codec,
		int	profile
	)

Return a name for the specified profile, if available.

Parameters:

	codec	the codec that is searched for the given profile
	profile	the profile value for which a name is requested

Returns:: A name for the profile if found, NULL otherwise.

Definition at line 1885 of file utils.c.

Referenced by avcodec_string().

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 2276 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 2293 of file utils.c.

Referenced by do_exit(), and main().

void av_log_ask_for_sample	(	void *	avc,
		const char *	msg,
			...
	)

Log a generic warning message asking for a sample.

This function is intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) only, and would normally not be used by applications.

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

Referenced by alac_decode_init(), ape_decode_init(), au_read_header(), av_log_missing_feature(), avpriv_adx_decode_header(), cdxl_decode_frame(), cinaudio_decode_init(), cinepak_decode(), cook_decode_init(), dca_exss_parse_header(), dca_subframe_header(), decode_band_hdr(), decode_bytes(), decode_channel_transform(), decode_frame(), decode_frame_byterun1(), decode_frame_headers(), decode_frame_ilbm(), decode_init(), decode_scalefactors(), decode_slice_header(), decode_subframe(), determine_bitrate(), ea_read_packet(), execute_code(), ff_mjpeg_decode_sof(), ff_mov_read_chan(), ff_parse_mpeg2_descriptor(), get_packet_header(), iff_read_header(), imc_decode_init(), mov_read_mdhd(), mpc7_decode_init(), mtv_read_header(), mxf_read_packet_old(), mxf_read_primer_pack(), oma_read_header(), parse_setup_header(), pmp_packet(), ptx_decode_frame(), read_block_data(), read_frame(), read_header(), read_major_sync(), read_restart_header(), rso_read_header(), save_bits(), smjpeg_read_header(), spdif_header_dts(), spdif_header_truehd(), spdif_read_packet(), sunrast_decode_frame(), truemotion1_decode_header(), truespeech_decode_init(), ws_snd_decode_init(), wsaud_read_header(), xa_decode(), xmv_read_header(), xwd_decode_frame(), and xwma_read_header().

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

Log a generic warning message about a missing feature.

This function is intended to be used internally by FFmpeg (libavcodec, libavformat, etc.) only, and would normally not be used by applications.

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 2240 of file utils.c.

Referenced by aac_adtstoasc_filter(), amrnb_decode_frame(), amrwb_decode_frame(), decode_audio_block(), decode_frame(), decode_frame_header(), decode_ga_specific_config(), decode_ics(), decode_init(), decode_packet(), decode_seq_header(), decode_slice_header(), decode_subframe(), ff_eac3_parse_header(), ff_h263_decode_frame(), ff_rv34_decode_frame(), ff_vc1_parse_frame_header_adv(), flashsv_decode_frame(), latm_decode_audio_specific_config(), mpc8_decode_init(), ogg_read_page(), parse_adts_frame_header(), parse_fmtp(), parse_MP4SLDescrTag(), qt_rtp_parse_packet(), read_sbr_extension(), read_stream_mux_config(), rv10_decode_init(), smc_decode_stream(), spdif_get_offset_and_codec(), spdif_read_packet(), synth_superframe(), and tta_decode_init().

void av_register_bitstream_filter ( AVBitStreamFilter * bsf )

Definition at line 30 of file bitstream_filter.c.

void void av_register_hwaccel ( AVHWAccel * hwaccel )

Register the hardware accelerator hwaccel.

Definition at line 2267 of file utils.c.

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 2220 of file utils.c.

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

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

Definition at line 634 of file utils.c.

Referenced by avcodec_get_context_defaults3(), and avcodec_thread_execute().

int avcodec_default_execute2	(	AVCodecContext *	c,
		int()(AVCodecContext c2, void *arg2, int, int)	func,
		void *	arg,
		int *	ret,
		int	count
	)

Referenced by avcodec_get_context_defaults3().

void avcodec_default_free_buffers ( AVCodecContext * s )

Definition at line 1972 of file utils.c.

Referenced by avcodec_close(), ff_MPV_common_end(), and frame_thread_free().

int avcodec_fill_audio_frame	(	AVFrame *	frame,
		int	nb_channels,
		enum AVSampleFormat	sample_fmt,
		const uint8_t *	buf,
		int	buf_size,
		int	align
	)

Fill audio frame data and linesize.

AVFrame extended_data channel pointers are allocated if necessary for planar audio.

Parameters:

	frame	the AVFrame frame->nb_samples must be set prior to calling the function. This function fills in frame->data, frame->extended_data, frame->linesize[0].
	nb_channels	channel count
	sample_fmt	sample format
	buf	buffer to use for frame data
	buf_size	size of buffer
	align	plane size sample alignment (0 = default)

Returns:: 0 on success, negative error code on failure

Definition at line 279 of file utils.c.

Referenced by audio_get_buffer(), avcodec_encode_audio(), pad_last_frame(), and write_audio_frame().

void avcodec_flush_buffers ( AVCodecContext * avctx )

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

Definition at line 1921 of file utils.c.

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

const char* avcodec_get_name ( enum CodecID id )

Get the name of a codec.

Returns:: a static string identifying the codec; never NULL

Definition at line 1754 of file utils.c.

Referenced by avcodec_string(), flv_write_packet(), init_input_stream(), read_frame_internal(), rtp_write_header(), and transcode_init().

enum AVMediaType avcodec_get_type ( enum CodecID codec_id )

Get the type of the given codec.

Definition at line 2374 of file utils.c.

Referenced by mkv_query_codec().

int avcodec_is_open ( AVCodecContext * s )

Returns:: a positive value if s is open (i.e. avcodec_open2() was called on it with no corresponding avcodec_close()), 0 otherwise.

Definition at line 2394 of file utils.c.

Referenced by avcodec_close(), avcodec_copy_context(), avcodec_open2(), and try_decode_frame().

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

Definition at line 149 of file utils.c.

Referenced by apply_param_change(), av_mpeg4_decode_header(), avcodec_open2(), avpriv_dirac_parse_sequence_header(), avs_decode_init(), cdxl_decode_frame(), cmv_process_header(), decode_frame(), decode_frame_headers(), decode_init(), decode_sequence_header_adv(), decode_slice_header(), dnxhd_decode_frame(), dvvideo_decode_frame(), execute_code(), ff_h263_decode_frame(), ff_ivi_decode_frame(), ff_mjpeg_decode_sof(), ff_rv34_decode_frame(), ff_vc1_decode_entry_point(), ff_vc1_decode_sequence_header(), ff_vp56_decode_frame(), gif_decode_frame(), h261_decode_frame(), init_image(), libopenjpeg_decode_frame(), mpeg_decode_postinit(), mpegvideo_extract_headers(), parse_presentation_segment(), pcx_decode_frame(), ptx_decode_frame(), rv20_decode_picture_header(), sunrast_decode_frame(), svq1_decode_frame(), tgq_decode_frame(), tgv_decode_frame(), theora_header(), tqi_decode_frame(), truemotion1_decode_header(), txd_decode_frame(), update_dimensions(), vp56_size_changed(), vp5_parse_header(), vp6_parse_header(), and vp8_decode().

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

Definition at line 1788 of file utils.c.

Referenced by dump_stream_format().


Data Structures
struct	AVBitStreamFilterContext
struct	AVBitStreamFilter
Modules
	Pixel formats
	Functions for working with pixel formats.
	FFT functions
Enumerations
enum	AVLockOp { AV_LOCK_CREATE, AV_LOCK_OBTAIN, AV_LOCK_RELEASE, AV_LOCK_DESTROY }
	Lock operation used by lockmgr. More...
Functions
void	avcodec_set_dimensions (AVCodecContext *s, int width, int height)
size_t	av_get_codec_tag_string (char *buf, size_t buf_size, unsigned int codec_tag)
	Put a string representing the codec tag codec_tag in buf.
void	avcodec_string (char buf, int buf_size, AVCodecContext enc, int encode)
const char *	av_get_profile_name (const AVCodec *codec, int profile)
	Return a name for the specified profile, if available.
int	avcodec_default_execute (AVCodecContext c, int(func)(AVCodecContext c2, void arg2), void arg, int ret, int count, int size)
int	avcodec_default_execute2 (AVCodecContext c, int(func)(AVCodecContext c2, void arg2, int, int), void arg, int ret, int count)
int	avcodec_fill_audio_frame (AVFrame frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t buf, int buf_size, int align)
	Fill audio frame data and linesize.
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)
int	av_get_bits_per_sample (enum CodecID codec_id)
	Return codec bits per sample.
enum CodecID	av_get_pcm_codec (enum AVSampleFormat fmt, int be)
	Return the PCM codec associated with a sample format.
int	av_get_exact_bits_per_sample (enum CodecID codec_id)
	Return codec bits per sample.
int	av_get_audio_frame_duration (AVCodecContext *avctx, int frame_bytes)
	Return audio frame duration.
void	av_register_bitstream_filter (AVBitStreamFilter *bsf)
AVBitStreamFilterContext *	av_bitstream_filter_init (const char *name)
int	av_bitstream_filter_filter (AVBitStreamFilterContext bsfc, AVCodecContext avctx, const char args, uint8_t poutbuf, int poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
void	av_bitstream_filter_close (AVBitStreamFilterContext *bsf)
AVBitStreamFilter *	av_bitstream_filter_next (AVBitStreamFilter *f)
void *	av_fast_realloc (void ptr, unsigned int size, size_t min_size)
	Reallocate the given block if it is not large enough, otherwise do nothing.
void	av_fast_malloc (void ptr, unsigned int size, size_t min_size)
	Allocate a buffer, reusing the given one if large enough.
void	av_fast_padded_malloc (void ptr, unsigned int size, size_t min_size)
	Same behaviour av_fast_malloc but the buffer has additional FF_INPUT_PADDING_SIZE at the end which will will always be 0.
unsigned int	av_xiphlacing (unsigned char *s, unsigned int v)
	Encode extradata length to a buffer.
void	av_log_missing_feature (void avc, const char feature, int want_sample)
	Log a generic warning message about a missing feature.
void	av_log_ask_for_sample (void avc, const char msg,...) av_printf_format(2
	Log a generic warning message asking for a sample.
void void	av_register_hwaccel (AVHWAccel *hwaccel)
	Register the hardware accelerator hwaccel.
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.
int	av_lockmgr_register (int(cb)(void *mutex, enum AVLockOp op))
	Register a user provided lock manager supporting the operations specified by AVLockOp.
enum AVMediaType	avcodec_get_type (enum CodecID codec_id)
	Get the type of the given codec.
const char *	avcodec_get_name (enum CodecID id)
	Get the name of a codec.
int	avcodec_is_open (AVCodecContext *s)
int	av_codec_is_encoder (AVCodec *codec)
int	av_codec_is_decoder (AVCodec *codec)

Utility functions [Encoding/Decoding Library]

Data Structures

Modules

Enumerations

Functions

Detailed Description

Enumeration Type Documentation

Function Documentation

Utility functions
[Encoding/Decoding Library]