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hwcontext_videotoolbox.h
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/*
* 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
*/
#ifndef AVUTIL_HWCONTEXT_VIDEOTOOLBOX_H
#define AVUTIL_HWCONTEXT_VIDEOTOOLBOX_H
#include <stdint.h>
#include <VideoToolbox/VideoToolbox.h>
#include "frame.h"
#include "pixfmt.h"
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_VIDEOTOOLBOX.
*
* This API supports frame allocation using a native CVPixelBufferPool
* instead of an AVBufferPool.
*
* If the API user sets a custom pool, AVHWFramesContext.pool must return
* AVBufferRefs whose data pointer is a CVImageBufferRef or CVPixelBufferRef.
* Note that the underlying CVPixelBuffer could be retained by OS frameworks
* depending on application usage, so it is preferable to let CoreVideo manage
* the pool using the default implementation.
*
* Currently AVHWDeviceContext.hwctx are always NULL.
*/
typedef struct AVVTFramesContext {
enum AVColorRange color_range;
} AVVTFramesContext;
/**
* Convert a VideoToolbox (actually CoreVideo) format to AVPixelFormat.
* Returns AV_PIX_FMT_NONE if no known equivalent was found.
*/
enum AVPixelFormat av_map_videotoolbox_format_to_pixfmt(uint32_t cv_fmt);
/**
* Convert an AVPixelFormat to a VideoToolbox (actually CoreVideo) format.
* Returns 0 if no known equivalent was found.
*/
uint32_t av_map_videotoolbox_format_from_pixfmt(enum AVPixelFormat pix_fmt);
/**
* Same as av_map_videotoolbox_format_from_pixfmt function, but can map and
* return full range pixel formats via a flag.
*/
uint32_t av_map_videotoolbox_format_from_pixfmt2(enum AVPixelFormat pix_fmt, bool full_range);
/**
* Convert an AVChromaLocation to a VideoToolbox/CoreVideo chroma location string.
* Returns 0 if no known equivalent was found.
*/
CFStringRef av_map_videotoolbox_chroma_loc_from_av(enum AVChromaLocation loc);
/**
* Convert an AVColorSpace to a VideoToolbox/CoreVideo color matrix string.
* Returns 0 if no known equivalent was found.
*/
CFStringRef av_map_videotoolbox_color_matrix_from_av(enum AVColorSpace space);
/**
* Convert an AVColorPrimaries to a VideoToolbox/CoreVideo color primaries string.
* Returns 0 if no known equivalent was found.
*/
CFStringRef av_map_videotoolbox_color_primaries_from_av(enum AVColorPrimaries pri);
/**
* Convert an AVColorTransferCharacteristic to a VideoToolbox/CoreVideo color transfer
* function string.
* Returns 0 if no known equivalent was found.
*/
CFStringRef av_map_videotoolbox_color_trc_from_av(enum AVColorTransferCharacteristic trc);
/**
* Set CVPixelBufferRef's metadata based on an AVFrame.
*
* Sets/unsets the CVPixelBuffer attachments to match as closely as possible the
* AVFrame metadata. To prevent inconsistent attachments, the attachments for properties
* that could not be matched or are unspecified in the given AVFrame are unset. So if
* any attachments already covered by AVFrame metadata need to be set to a specific
* value, this should happen after calling this function.
*
* Returns < 0 in case of an error.
*/
int av_vt_pixbuf_set_attachments(void *log_ctx,
CVPixelBufferRef pixbuf, const struct AVFrame *src);
#endif /* AVUTIL_HWCONTEXT_VIDEOTOOLBOX_H */
pix_fmt
static enum AVPixelFormat pix_fmt
Definition demux_decode.c:41
frame.h
reference-counted frame API
av_map_videotoolbox_chroma_loc_from_av
CFStringRef av_map_videotoolbox_chroma_loc_from_av(enum AVChromaLocation loc)
Convert an AVChromaLocation to a VideoToolbox/CoreVideo chroma location string.
av_vt_pixbuf_set_attachments
int av_vt_pixbuf_set_attachments(void *log_ctx, CVPixelBufferRef pixbuf, const struct AVFrame *src)
Set CVPixelBufferRef's metadata based on an AVFrame.
av_map_videotoolbox_format_to_pixfmt
enum AVPixelFormat av_map_videotoolbox_format_to_pixfmt(uint32_t cv_fmt)
Convert a VideoToolbox (actually CoreVideo) format to AVPixelFormat.
av_map_videotoolbox_color_matrix_from_av
CFStringRef av_map_videotoolbox_color_matrix_from_av(enum AVColorSpace space)
Convert an AVColorSpace to a VideoToolbox/CoreVideo color matrix string.
av_map_videotoolbox_color_primaries_from_av
CFStringRef av_map_videotoolbox_color_primaries_from_av(enum AVColorPrimaries pri)
Convert an AVColorPrimaries to a VideoToolbox/CoreVideo color primaries string.
av_map_videotoolbox_format_from_pixfmt
uint32_t av_map_videotoolbox_format_from_pixfmt(enum AVPixelFormat pix_fmt)
Convert an AVPixelFormat to a VideoToolbox (actually CoreVideo) format.
av_map_videotoolbox_format_from_pixfmt2
uint32_t av_map_videotoolbox_format_from_pixfmt2(enum AVPixelFormat pix_fmt, bool full_range)
Same as av_map_videotoolbox_format_from_pixfmt function, but can map and return full range pixel form...
av_map_videotoolbox_color_trc_from_av
CFStringRef av_map_videotoolbox_color_trc_from_av(enum AVColorTransferCharacteristic trc)
Convert an AVColorTransferCharacteristic to a VideoToolbox/CoreVideo color transfer function string.
pixfmt.h
pixel format definitions
AVChromaLocation
AVChromaLocation
Location of chroma samples.
Definition pixfmt.h:705
AVColorRange
AVColorRange
Visual content value range.
Definition pixfmt.h:651
AVPixelFormat
AVPixelFormat
Pixel format.
Definition pixfmt.h:71
AVColorPrimaries
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition pixfmt.h:555
AVColorTransferCharacteristic
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition pixfmt.h:580
AVColorSpace
AVColorSpace
YUV colorspace type.
Definition pixfmt.h:609
AVFrame
This structure describes decoded (raw) audio or video data.
Definition frame.h:389
AVVTFramesContext
Definition hwcontext_videotoolbox.h:45
AVVTFramesContext::color_range
enum AVColorRange color_range
Definition hwcontext_videotoolbox.h:46