mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
1a52cbd404
We don't need to include fifo.h, because we don't need AVFifo as a complete type. Also add the other used headers directly. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*
|
|
* CEA-708 Closed Captioning FIFO
|
|
* Copyright (c) 2023 LTN Global Communications
|
|
*
|
|
* Author: Devin Heitmueller <dheitmueller@ltnglobal.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* CC FIFO Buffer
|
|
*/
|
|
|
|
#ifndef AVFILTER_CCFIFO_H
|
|
#define AVFILTER_CCFIFO_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/frame.h"
|
|
#include "libavutil/rational.h"
|
|
|
|
#define CC_BYTES_PER_ENTRY 3
|
|
|
|
typedef struct CCFifo {
|
|
struct AVFifo *cc_608_fifo;
|
|
struct AVFifo *cc_708_fifo;
|
|
AVRational framerate;
|
|
int expected_cc_count;
|
|
int expected_608;
|
|
int cc_detected;
|
|
int passthrough;
|
|
int passthrough_warning;
|
|
void *log_ctx;
|
|
} CCFifo;
|
|
|
|
/**
|
|
* Initialize a CCFifo.
|
|
*
|
|
* @param framerate output framerate
|
|
* @param log_ctx used for any av_log() calls
|
|
* @return Zero on success, or negative AVERROR code on failure.
|
|
*/
|
|
int ff_ccfifo_init(CCFifo *ccf, AVRational framerate, void *log_ctx);
|
|
|
|
/**
|
|
* Free all memory allocated in a CCFifo and clear the context.
|
|
*
|
|
* @param ccf Pointer to the CCFifo which should be uninitialized
|
|
*/
|
|
void ff_ccfifo_uninit(CCFifo *ccf);
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @param af CCFifo to write to
|
|
* @param frame AVFrame with the video frame to operate on
|
|
* @return Zero on success, or negative AVERROR
|
|
* code on failure.
|
|
*/
|
|
int ff_ccfifo_extract(CCFifo *ccf, AVFrame *frame);
|
|
|
|
/**
|
|
*Just like ff_ccfifo_extract(), but takes the raw bytes instead of an AVFrame
|
|
*/
|
|
int ff_ccfifo_extractbytes(CCFifo *ccf, uint8_t *data, size_t len);
|
|
|
|
/**
|
|
* 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()
|
|
*
|
|
*/
|
|
static inline int ff_ccfifo_getoutputsize(const CCFifo *ccf)
|
|
{
|
|
return ccf->expected_cc_count * CC_BYTES_PER_ENTRY;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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
|
|
*
|
|
* @param af CCFifo to read from
|
|
* @param frame AVFrame with the video frame to operate on
|
|
* @return Zero on success, or negative AVERROR
|
|
* code on failure.
|
|
*/
|
|
int ff_ccfifo_inject(CCFifo *ccf, AVFrame *frame);
|
|
|
|
/**
|
|
* Just like ff_ccfifo_inject(), but takes the raw bytes to insert the CC data
|
|
* int rather than an AVFrame
|
|
*/
|
|
int ff_ccfifo_injectbytes(CCFifo *ccf, uint8_t *data, size_t len);
|
|
|
|
/**
|
|
* Returns 1 if captions have been found as a prior call
|
|
* to ff_ccfifo_extract() or ff_ccfifo_extractbytes()
|
|
*/
|
|
static inline int ff_ccfifo_ccdetected(const CCFifo *ccf)
|
|
{
|
|
return ccf->cc_detected;
|
|
}
|
|
|
|
#endif /* AVFILTER_CCFIFO_H */
|