Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

avformat/img2: Avoid relocations for ff_img_tags

Browse Source 
The strings here are so short that using a pointer is wasteful
(the longest string takes nine bytes; on 64 bit systems,
the pointer+padding already take 12 bytes). So avoid them
and add asserts to ensure that no one ever tries to use a too
long tag.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
release/7.1
Andreas Rheinhardt 7 months ago
parent 1533351990
commit 497a0f839d
2 changed files with 80 additions and 70 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 148
      libavformat/img2.c
  2. 2
      libavformat/img2.h

148
libavformat/img2.c
Unescape View File

@ -20,80 +20,90 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <assert.h>
#include "libavutil/avstring.h"
#include "internal.h"
#include "img2.h"
#define IMG_TAGS(TAG) \
TAG(MJPEG, jpeg ) \
TAG(MJPEG, jpg ) \
TAG(MJPEG, jps ) \
TAG(MJPEG, mpo ) \
TAG(LJPEG, ljpg ) \
TAG(JPEGLS, jls ) \
TAG(PNG, png ) \
TAG(PNG, pns ) \
TAG(PNG, mng ) \
TAG(PPM, ppm ) \
TAG(PPM, pnm ) \
TAG(PGM, pgm ) \
TAG(PGMYUV, pgmyuv ) \
TAG(PBM, pbm ) \
TAG(PAM, pam ) \
TAG(PFM, pfm ) \
TAG(PHM, phm ) \
TAG(CRI, cri ) \
TAG(ALIAS_PIX, pix ) \
TAG(DDS, dds ) \
TAG(MPEG1VIDEO, mpg1-img ) \
TAG(MPEG2VIDEO, mpg2-img ) \
TAG(MPEG4, mpg4-img ) \
TAG(RAWVIDEO, y ) \
TAG(RAWVIDEO, raw ) \
TAG(BMP, bmp ) \
TAG(TARGA, tga ) \
TAG(TIFF, tiff ) \
TAG(TIFF, tif ) \
TAG(TIFF, dng ) \
TAG(SGI, sgi ) \
TAG(PTX, ptx ) \
TAG(PHOTOCD, pcd ) \
TAG(PCX, pcx ) \
TAG(QDRAW, pic ) \
TAG(QDRAW, pct ) \
TAG(QDRAW, pict ) \
TAG(SUNRAST, sun ) \
TAG(SUNRAST, ras ) \
TAG(SUNRAST, rs ) \
TAG(SUNRAST, im1 ) \
TAG(SUNRAST, im8 ) \
TAG(SUNRAST, im24 ) \
TAG(SUNRAST, im32 ) \
TAG(SUNRAST, sunras ) \
TAG(SVG, svg ) \
TAG(SVG, svgz ) \
TAG(JPEG2000, j2c ) \
TAG(JPEG2000, jp2 ) \
TAG(JPEG2000, jpc ) \
TAG(JPEG2000, j2k ) \
TAG(DPX, dpx ) \
TAG(EXR, exr ) \
TAG(PICTOR, pic ) \
TAG(V210X, yuv10 ) \
TAG(WEBP, webp ) \
TAG(XBM, xbm ) \
TAG(XPM, xpm ) \
TAG(XFACE, xface ) \
TAG(XWD, xwd ) \
TAG(GEM, img ) \
TAG(GEM, ximg ) \
TAG(GEM, timg ) \
TAG(VBN, vbn ) \
TAG(JPEGXL, jxl ) \
TAG(QOI, qoi ) \
TAG(RADIANCE_HDR, hdr ) \
TAG(WBMP, wbmp ) \
TAG(NONE, )
#define LENGTH_CHECK(CODECID, STR) \
static_assert(sizeof(#STR) <= sizeof(ff_img_tags->str), #STR " does not fit into IdStrMap.str\n");
IMG_TAGS(LENGTH_CHECK)
const IdStrMap ff_img_tags[] = {
{ AV_CODEC_ID_MJPEG, "jpeg" },
{ AV_CODEC_ID_MJPEG, "jpg" },
{ AV_CODEC_ID_MJPEG, "jps" },
{ AV_CODEC_ID_MJPEG, "mpo" },
{ AV_CODEC_ID_LJPEG, "ljpg" },
{ AV_CODEC_ID_JPEGLS, "jls" },
{ AV_CODEC_ID_PNG, "png" },
{ AV_CODEC_ID_PNG, "pns" },
{ AV_CODEC_ID_PNG, "mng" },
{ AV_CODEC_ID_PPM, "ppm" },
{ AV_CODEC_ID_PPM, "pnm" },
{ AV_CODEC_ID_PGM, "pgm" },
{ AV_CODEC_ID_PGMYUV, "pgmyuv" },
{ AV_CODEC_ID_PBM, "pbm" },
{ AV_CODEC_ID_PAM, "pam" },
{ AV_CODEC_ID_PFM, "pfm" },
{ AV_CODEC_ID_PHM, "phm" },
{ AV_CODEC_ID_CRI, "cri" },
{ AV_CODEC_ID_ALIAS_PIX, "pix" },
{ AV_CODEC_ID_DDS, "dds" },
{ AV_CODEC_ID_MPEG1VIDEO, "mpg1-img" },
{ AV_CODEC_ID_MPEG2VIDEO, "mpg2-img" },
{ AV_CODEC_ID_MPEG4, "mpg4-img" },
{ AV_CODEC_ID_RAWVIDEO, "y" },
{ AV_CODEC_ID_RAWVIDEO, "raw" },
{ AV_CODEC_ID_BMP, "bmp" },
{ AV_CODEC_ID_TARGA, "tga" },
{ AV_CODEC_ID_TIFF, "tiff" },
{ AV_CODEC_ID_TIFF, "tif" },
{ AV_CODEC_ID_TIFF, "dng" },
{ AV_CODEC_ID_SGI, "sgi" },
{ AV_CODEC_ID_PTX, "ptx" },
{ AV_CODEC_ID_PHOTOCD, "pcd" },
{ AV_CODEC_ID_PCX, "pcx" },
{ AV_CODEC_ID_QDRAW, "pic" },
{ AV_CODEC_ID_QDRAW, "pct" },
{ AV_CODEC_ID_QDRAW, "pict" },
{ AV_CODEC_ID_SUNRAST, "sun" },
{ AV_CODEC_ID_SUNRAST, "ras" },
{ AV_CODEC_ID_SUNRAST, "rs" },
{ AV_CODEC_ID_SUNRAST, "im1" },
{ AV_CODEC_ID_SUNRAST, "im8" },
{ AV_CODEC_ID_SUNRAST, "im24" },
{ AV_CODEC_ID_SUNRAST, "im32" },
{ AV_CODEC_ID_SUNRAST, "sunras" },
{ AV_CODEC_ID_SVG, "svg" },
{ AV_CODEC_ID_SVG, "svgz" },
{ AV_CODEC_ID_JPEG2000, "j2c" },
{ AV_CODEC_ID_JPEG2000, "jp2" },
{ AV_CODEC_ID_JPEG2000, "jpc" },
{ AV_CODEC_ID_JPEG2000, "j2k" },
{ AV_CODEC_ID_DPX, "dpx" },
{ AV_CODEC_ID_EXR, "exr" },
{ AV_CODEC_ID_PICTOR, "pic" },
{ AV_CODEC_ID_V210X, "yuv10" },
{ AV_CODEC_ID_WEBP, "webp" },
{ AV_CODEC_ID_XBM, "xbm" },
{ AV_CODEC_ID_XPM, "xpm" },
{ AV_CODEC_ID_XFACE, "xface" },
{ AV_CODEC_ID_XWD, "xwd" },
{ AV_CODEC_ID_GEM, "img" },
{ AV_CODEC_ID_GEM, "ximg" },
{ AV_CODEC_ID_GEM, "timg" },
{ AV_CODEC_ID_VBN, "vbn" },
{ AV_CODEC_ID_JPEGXL, "jxl" },
{ AV_CODEC_ID_QOI, "qoi" },
{ AV_CODEC_ID_RADIANCE_HDR, "hdr" },
{ AV_CODEC_ID_WBMP, "wbmp" },
{ AV_CODEC_ID_NONE, NULL }
#define TAG(CODECID, STR) { AV_CODEC_ID_ ## CODECID, #STR },
IMG_TAGS(TAG)
};
static enum AVCodecID str2id(const IdStrMap *tags, const char *str)

2
libavformat/img2.h
Unescape View File

@ -66,7 +66,7 @@ typedef struct VideoDemuxData {
typedef struct IdStrMap {
enum AVCodecID id;
const char *str;
char str[12];
} IdStrMap;
extern const IdStrMap ff_img_tags[];

Write Preview
Loading…
Cancel
Save