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ffmpeg/libavcodec/v4l2_fmt.c

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/*
* V4L2 format helper functions
*
* Copyright (C) 2017 Alexis Ballier <aballier@gentoo.org>
* Copyright (C) 2017 Jorge Ramirez <jorge.ramirez-ortiz@linaro.org>
*
* 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
*/
#include <linux/videodev2.h>
#include <search.h>
#include "v4l2_fmt.h"
#define V4L2_FMT(x) V4L2_PIX_FMT_##x
#define AV_CODEC(x) AV_CODEC_ID_##x
#define AV_FMT(x) AV_PIX_FMT_##x
static const struct fmt_conversion {
enum AVPixelFormat avfmt;
enum AVCodecID avcodec;
uint32_t v4l2_fmt;
} fmt_map[] = {
{ AV_FMT(RGB555LE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB555) },
{ AV_FMT(RGB555BE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB555X) },
{ AV_FMT(RGB565LE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB565) },
{ AV_FMT(RGB565BE), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB565X) },
{ AV_FMT(BGR24), AV_CODEC(RAWVIDEO), V4L2_FMT(BGR24) },
{ AV_FMT(RGB24), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB24) },
{ AV_FMT(BGR0), AV_CODEC(RAWVIDEO), V4L2_FMT(BGR32) },
{ AV_FMT(0RGB), AV_CODEC(RAWVIDEO), V4L2_FMT(RGB32) },
{ AV_FMT(GRAY8), AV_CODEC(RAWVIDEO), V4L2_FMT(GREY) },
{ AV_FMT(YUV420P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV420) },
{ AV_FMT(YUYV422), AV_CODEC(RAWVIDEO), V4L2_FMT(YUYV) },
{ AV_FMT(UYVY422), AV_CODEC(RAWVIDEO), V4L2_FMT(UYVY) },
{ AV_FMT(YUV422P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV422P) },
{ AV_FMT(YUV411P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV411P) },
{ AV_FMT(YUV410P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV410) },
{ AV_FMT(YUV410P), AV_CODEC(RAWVIDEO), V4L2_FMT(YVU410) },
{ AV_FMT(NV12), AV_CODEC(RAWVIDEO), V4L2_FMT(NV12) },
{ AV_FMT(NONE), AV_CODEC(MJPEG), V4L2_FMT(MJPEG) },
{ AV_FMT(NONE), AV_CODEC(MJPEG), V4L2_FMT(JPEG) },
#ifdef V4L2_PIX_FMT_SRGGB8
{ AV_FMT(BAYER_BGGR8), AV_CODEC(RAWVIDEO), V4L2_FMT(SBGGR8) },
{ AV_FMT(BAYER_GBRG8), AV_CODEC(RAWVIDEO), V4L2_FMT(SGBRG8) },
{ AV_FMT(BAYER_GRBG8), AV_CODEC(RAWVIDEO), V4L2_FMT(SGRBG8) },
{ AV_FMT(BAYER_RGGB8), AV_CODEC(RAWVIDEO), V4L2_FMT(SRGGB8) },
#endif
#ifdef V4L2_PIX_FMT_Y16
{ AV_FMT(GRAY16LE), AV_CODEC(RAWVIDEO), V4L2_FMT(Y16) },
#endif
#ifdef V4L2_PIX_FMT_NV12M
{ AV_FMT(NV12), AV_CODEC(RAWVIDEO), V4L2_FMT(NV12M) },
#endif
#ifdef V4L2_PIX_FMT_NV21M
{ AV_FMT(NV21), AV_CODEC(RAWVIDEO), V4L2_FMT(NV21M) },
#endif
#ifdef V4L2_PIX_FMT_YUV420M
{ AV_FMT(YUV420P), AV_CODEC(RAWVIDEO), V4L2_FMT(YUV420M) },
#endif
#ifdef V4L2_PIX_FMT_NV16M
{ AV_FMT(NV16), AV_CODEC(RAWVIDEO), V4L2_FMT(NV16M) },
#endif
#ifdef V4L2_PIX_FMT_H263
{ AV_FMT(NONE), AV_CODEC(H263), V4L2_FMT(H263) },
#endif
#ifdef V4L2_PIX_FMT_H264
{ AV_FMT(NONE), AV_CODEC(H264), V4L2_FMT(H264) },
#endif
#ifdef V4L2_PIX_FMT_MPEG4
{ AV_FMT(NONE), AV_CODEC(MPEG4), V4L2_FMT(MPEG4) },
#endif
#ifdef V4L2_PIX_FMT_CPIA1
{ AV_FMT(NONE), AV_CODEC(CPIA), V4L2_FMT(CPIA1) },
#endif
#ifdef V4L2_PIX_FMT_DV
{ AV_FMT(NONE), AV_CODEC(DVVIDEO), V4L2_FMT(DV) },
#endif
#ifdef V4L2_PIX_FMT_MPEG1
{ AV_FMT(NONE), AV_CODEC(MPEG1VIDEO), V4L2_FMT(MPEG1) },
#endif
#ifdef V4L2_PIX_FMT_MPEG2
{ AV_FMT(NONE), AV_CODEC(MPEG2VIDEO), V4L2_FMT(MPEG2) },
#endif
#ifdef V4L2_PIX_FMT_VP8
{ AV_FMT(NONE), AV_CODEC(VP8), V4L2_FMT(VP8) },
#endif
#ifdef V4L2_PIX_FMT_VP9
{ AV_FMT(NONE), AV_CODEC(VP9), V4L2_FMT(VP9) },
#endif
#ifdef V4L2_PIX_FMT_HEVC
{ AV_FMT(NONE), AV_CODEC(HEVC), V4L2_FMT(HEVC) },
#endif
#ifdef V4L2_PIX_FMT_VC1_ANNEX_G
{ AV_FMT(NONE), AV_CODEC(VC1), V4L2_FMT(VC1_ANNEX_G) },
#endif
};
static int match_codec(const void *a, const void *b)
{
if (*(enum AVCodecID *)a == ((struct fmt_conversion *)b)->avcodec)
return 0;
return 1;
}
uint32_t ff_v4l2_format_avcodec_to_v4l2(enum AVCodecID avcodec)
{
size_t len = FF_ARRAY_ELEMS(fmt_map);
struct fmt_conversion *item;
item = lfind(&avcodec, fmt_map, &len, sizeof(fmt_map[0]), match_codec);
if (item)
return item->v4l2_fmt;
return 0;
}
static int match_fmt(const void *a, const void *b)
{
if ( *(enum AVPixelFormat *)a == ((struct fmt_conversion *)b)->avfmt)
return 0;
return 1;
}
uint32_t ff_v4l2_format_avfmt_to_v4l2(enum AVPixelFormat avfmt)
{
size_t len = FF_ARRAY_ELEMS(fmt_map);
struct fmt_conversion *item;
item = lfind(&avfmt, fmt_map, &len, sizeof(fmt_map[0]), match_fmt);
if (item)
return item->v4l2_fmt;
return 0;
}
struct v4l2fmt_avcodec_pair {
enum AVCodecID avcodec;
uint32_t v4l2_fmt;
};
static int match_codecfmt(const void *a, const void *b)
{
struct v4l2fmt_avcodec_pair *key = (struct v4l2fmt_avcodec_pair *) a;
struct fmt_conversion *item = (struct fmt_conversion *) b;
if (key->avcodec == item->avcodec && key->v4l2_fmt == item->v4l2_fmt)
return 0;
return 1;
}
enum AVPixelFormat ff_v4l2_format_v4l2_to_avfmt(uint32_t v4l2_fmt, enum AVCodecID avcodec)
{
struct v4l2fmt_avcodec_pair const key = {
.v4l2_fmt = v4l2_fmt,
.avcodec = avcodec,
};
size_t len = FF_ARRAY_ELEMS(fmt_map);
struct fmt_conversion *item;
item = lfind(&key, fmt_map, &len, sizeof(fmt_map[0]), match_codecfmt);
if (item)
return item->avfmt;
return AV_PIX_FMT_NONE;
}
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