ccfifo.c File Reference

#include "ccfifo.h"

Go to the source code of this file.

Data Structures
struct	cc_lookup

Macros
#define	MAX_CC_ELEMENTS   128
#define	CC_BYTES_PER_ENTRY   3

Functions
void	ff_ccfifo_uninit (CCFifo *ccf)
	Free all memory allocated in a CCFifo and clear the context. More...
int	ff_ccfifo_init (CCFifo *ccf, AVRational framerate, void *log_ctx)
	Initialize a CCFifo. More...
int	ff_ccfifo_getoutputsize (const CCFifo *ccf)
	Provide the size in bytes of an output buffer to allocate. More...
int	ff_ccfifo_ccdetected (const CCFifo *ccf)
	Returns 1 if captions have been found as a prior call to ff_ccfifo_extract() or ff_ccfifo_extractbytes() More...
int	ff_ccfifo_injectbytes (CCFifo *ccf, uint8_t *cc_data, size_t len)
	Just like ff_ccfifo_inject(), but takes the raw bytes to insert the CC data int rather than an AVFrame. More...
int	ff_ccfifo_inject (CCFifo *ccf, AVFrame *frame)
	Insert CC data from the FIFO into an AVFrame (as side data) More...
int	ff_ccfifo_extractbytes (CCFifo *ccf, uint8_t *cc_bytes, size_t len)
	Just like ff_ccfifo_extract(), but takes the raw bytes instead of an AVFrame. More...
int	ff_ccfifo_extract (CCFifo *ccf, AVFrame *frame)
	Extract CC data from an AVFrame. More...

Variables
const static struct cc_lookup	cc_lookup_vals []

Macro Definition Documentation

MAX_CC_ELEMENTS

#define MAX_CC_ELEMENTS   128

Definition at line 26 of file ccfifo.c.

CC_BYTES_PER_ENTRY

#define CC_BYTES_PER_ENTRY   3

Definition at line 27 of file ccfifo.c.

Function Documentation

ff_ccfifo_uninit()

void ff_ccfifo_uninit

(

CCFifo *

ccf

)

Free all memory allocated in a CCFifo and clear the context.

Parameters

ccf	Pointer to the CCFifo which should be uninitialized

Definition at line 46 of file ccfifo.c.

Referenced by deint_cuda_uninit(), ff_ccfifo_init(), ff_decklink_write_trailer(), and uninit().

ff_ccfifo_init()

int ff_ccfifo_init	(	CCFifo *	ccf,
		AVRational	framerate,
		void *	log_ctx
	)

Initialize a CCFifo.

Parameters

framerate	output framerate
log_ctx	used for any av_log() calls

Returns

Zero on success, or negative AVERROR code on failure.

Definition at line 53 of file ccfifo.c.

Referenced by config_input(), config_out_props(), config_output(), config_props(), and ff_decklink_write_header().

ff_ccfifo_getoutputsize()

int ff_ccfifo_getoutputsize

(

const CCFifo *

ccf

)

Provide the size in bytes of an output buffer to allocate.

Ask for how many bytes the output will contain, so the caller can allocate an appropriately sized buffer and pass it to ff_ccfifo_injectbytes()

Definition at line 92 of file ccfifo.c.

Referenced by ff_ccfifo_inject(), and ff_ccfifo_injectbytes().

ff_ccfifo_ccdetected()

int ff_ccfifo_ccdetected

(

const CCFifo *

ccf

)

Returns 1 if captions have been found as a prior call to ff_ccfifo_extract() or ff_ccfifo_extractbytes()

Definition at line 97 of file ccfifo.c.

ff_ccfifo_injectbytes()

int ff_ccfifo_injectbytes	(	CCFifo *	ccf,
		uint8_t *	cc_data,
		size_t	len
	)

Just like ff_ccfifo_inject(), but takes the raw bytes to insert the CC data int rather than an AVFrame.

Definition at line 102 of file ccfifo.c.

Referenced by ff_ccfifo_inject().

ff_ccfifo_inject()

int ff_ccfifo_inject	(	CCFifo *	ccf,
		AVFrame *	frame
	)

Insert CC data from the FIFO into an AVFrame (as side data)

Dequeue the appropriate number of CC tuples based on the frame rate, and insert them into the AVFrame

Parameters

af	CCFifo to read from
frame	AVFrame with the video frame to operate on

Returns

Zero on success, or negative AVERROR code on failure.

Definition at line 143 of file ccfifo.c.

Referenced by ff_yadif_filter_frame(), filter_frame(), return_frame(), and write_frame().

ff_ccfifo_extractbytes()

int ff_ccfifo_extractbytes	(	CCFifo *	ccf,
		uint8_t *	cc_bytes,
		size_t	len
	)

Just like ff_ccfifo_extract(), but takes the raw bytes instead of an AVFrame.

Definition at line 164 of file ccfifo.c.

Referenced by decklink_write_subtitle_packet(), and ff_ccfifo_extract().

ff_ccfifo_extract()

int ff_ccfifo_extract	(	CCFifo *	ccf,
		AVFrame *	frame
	)

Extract CC data from an AVFrame.

Extract CC bytes from the AVFrame, insert them into our queue, and remove the side data from the AVFrame. The side data is removed as it will be re-inserted at the appropriate rate later in the filter.

Parameters

af	CCFifo to write to
frame	AVFrame with the video frame to operate on

Returns

Zero on success, or negative AVERROR code on failure.

Definition at line 193 of file ccfifo.c.

Referenced by ff_yadif_filter_frame(), filter_frame(), and read_frame().

Variable Documentation

cc_lookup_vals

const static struct cc_lookup cc_lookup_vals[]

static

Initial value:

= {
    { 15, 1, 40, 4 },
    { 24, 1, 25, 3 },
    { 24000, 1001, 25, 3 },
    { 30, 1, 20, 2 },
    { 30000, 1001, 20, 2},
    { 60, 1, 10, 1 },
    { 60000, 1001, 10, 1},
}

Definition at line 36 of file ccfifo.c.

Referenced by ff_ccfifo_init().