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Move the video size and rate abbreviations system from libavformat to libavcodec

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patch by Stefano Sabatini: [stefano dot sabatini minus lala poste dot it]
original thread:
[FFmpeg-devel] [PATCH] Redesign the video size and rateabbreviations system
date: 06/02/2007 05:30 PM

Originally committed as revision 9288 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Stefano Sabatini 2007-06-12 08:06:54 +00:00 • committed by Benoit Fouet
parent 0a4f20c6c5
commit 26ef3220cf
4 changed files with 145 additions and 105 deletions
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110
libavcodec/utils.c
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@ -1347,3 +1347,113 @@ int av_tempfile(char *prefix, char **filename) {
}
return fd; /* success */
}
typedef struct {
const char *abv;
int width, height;
int frame_rate, frame_rate_base;
} AbvEntry;
static AbvEntry frame_abvs[] = {
{ "ntsc", 720, 480, 30000, 1001 },
{ "pal", 720, 576, 25, 1 },
{ "qntsc", 352, 240, 30000, 1001 }, /* VCD compliant ntsc */
{ "qpal", 352, 288, 25, 1 }, /* VCD compliant pal */
{ "sntsc", 640, 480, 30000, 1001 }, /* square pixel NTSC */
{ "spal", 768, 576, 25, 1 }, /* square pixel PAL */
{ "film", 352, 240, 24, 1 },
{ "ntsc-film", 352, 240, 24000, 1001 },
{ "sqcif", 128, 96, 0, 0 },
{ "qcif", 176, 144, 0, 0 },
{ "cif", 352, 288, 0, 0 },
{ "4cif", 704, 576, 0, 0 },
{ "qqvga", 160, 120, 0, 0 },
{ "qvga", 320, 240, 0, 0 },
{ "vga", 640, 480, 0, 0 },
{ "svga", 800, 600, 0, 0 },
{ "xga", 1024, 768, 0, 0 },
{ "uxga", 1600,1200, 0, 0 },
{ "qxga", 2048,1536, 0, 0 },
{ "sxga", 1280,1024, 0, 0 },
{ "qsxga", 2560,2048, 0, 0 },
{ "hsxga", 5120,4096, 0, 0 },
{ "wvga", 852, 480, 0, 0 },
{ "wxga", 1366, 768, 0, 0 },
{ "wsxga", 1600,1024, 0, 0 },
{ "wuxga", 1920,1200, 0, 0 },
{ "woxga", 2560,1600, 0, 0 },
{ "wqsxga", 3200,2048, 0, 0 },
{ "wquxga", 3840,2400, 0, 0 },
{ "whsxga", 6400,4096, 0, 0 },
{ "whuxga", 7680,4800, 0, 0 },
{ "cga", 320, 200, 0, 0 },
{ "ega", 640, 350, 0, 0 },
{ "hd480", 852, 480, 0, 0 },
{ "hd720", 1280, 720, 0, 0 },
{ "hd1080", 1920,1080, 0, 0 },
};
int av_parse_video_frame_size(int *width_ptr, int *height_ptr, const char *str)
{
int i;
int n = sizeof(frame_abvs) / sizeof(AbvEntry);
const char *p;
int frame_width = 0, frame_height = 0;
for(i=0;i<n;i++) {
if (!strcmp(frame_abvs[i].abv, str)) {
frame_width = frame_abvs[i].width;
frame_height = frame_abvs[i].height;
break;
}
}
if (i == n) {
p = str;
frame_width = strtol(p, (char **)&p, 10);
if (*p)
p++;
frame_height = strtol(p, (char **)&p, 10);
}
if (frame_width <= 0 || frame_height <= 0)
return -1;
*width_ptr = frame_width;
*height_ptr = frame_height;
return 0;
}
int av_parse_video_frame_rate(AVRational *frame_rate, const char *arg)
{
int i;
char* cp;
/* First, we check our abbreviation table */
for (i = 0; i < sizeof(frame_abvs)/sizeof(*frame_abvs); ++i)
if (!strcmp(frame_abvs[i].abv, arg)) {
frame_rate->num = frame_abvs[i].frame_rate;
frame_rate->den = frame_abvs[i].frame_rate_base;
return 0;
}
/* Then, we try to parse it as fraction */
cp = strchr(arg, '/');
if (!cp)
cp = strchr(arg, ':');
if (cp) {
char* cpp;
frame_rate->num = strtol(arg, &cpp, 10);
if (cpp != arg || cpp == cp)
frame_rate->den = strtol(cp+1, &cpp, 10);
else
frame_rate->num = 0;
}
else {
/* Finally we give up and parse it as double */
AVRational time_base = av_d2q(strtod(arg, 0), DEFAULT_FRAME_RATE_BASE);
frame_rate->den = time_base.den;
frame_rate->num = time_base.num;
}
if (!frame_rate->num || !frame_rate->den)
return -1;
else
return 0;
}