[FFmpeg-cvslog] r20870 - trunk/ffmpeg.c
stefano
subversion
Tue Dec 15 00:18:50 CET 2009
Author: stefano
Date: Tue Dec 15 00:18:49 2009
New Revision: 20870
Log:
Use symbolic names for PAL/NTSC/FILM rather than numeric constants in opt_target().
Improve readability.
Modified:
trunk/ffmpeg.c
Modified: trunk/ffmpeg.c
==============================================================================
--- trunk/ffmpeg.c Mon Dec 14 22:08:21 2009 (r20869)
+++ trunk/ffmpeg.c Tue Dec 15 00:18:49 2009 (r20870)
@@ -3599,26 +3599,26 @@ static void show_help(void)
static void opt_target(const char *arg)
{
- int norm = -1;
+ enum { PAL, NTSC, FILM, UNKNOWN } norm = UNKNOWN;
static const char *const frame_rates[] = {"25", "30000/1001", "24000/1001"};
if(!strncmp(arg, "pal-", 4)) {
- norm = 0;
+ norm = PAL;
arg += 4;
} else if(!strncmp(arg, "ntsc-", 5)) {
- norm = 1;
+ norm = NTSC;
arg += 5;
} else if(!strncmp(arg, "film-", 5)) {
- norm = 2;
+ norm = FILM;
arg += 5;
} else {
int fr;
/* Calculate FR via float to avoid int overflow */
fr = (int)(frame_rate.num * 1000.0 / frame_rate.den);
if(fr == 25000) {
- norm = 0;
+ norm = PAL;
} else if((fr == 29970) || (fr == 23976)) {
- norm = 1;
+ norm = NTSC;
} else {
/* Try to determine PAL/NTSC by peeking in the input files */
if(nb_input_files) {
@@ -3630,23 +3630,23 @@ static void opt_target(const char *arg)
continue;
fr = c->time_base.den * 1000 / c->time_base.num;
if(fr == 25000) {
- norm = 0;
+ norm = PAL;
break;
} else if((fr == 29970) || (fr == 23976)) {
- norm = 1;
+ norm = NTSC;
break;
}
}
- if(norm >= 0)
+ if(norm != UNKNOWN)
break;
}
}
}
- if(verbose && norm >= 0)
- fprintf(stderr, "Assuming %s for target.\n", norm ? "NTSC" : "PAL");
+ if(verbose && norm != UNKNOWN)
+ fprintf(stderr, "Assuming %s for target.\n", norm != PAL ? "NTSC" : "PAL");
}
- if(norm < 0) {
+ if(norm == UNKNOWN) {
fprintf(stderr, "Could not determine norm (PAL/NTSC/NTSC-Film) for target.\n");
fprintf(stderr, "Please prefix target with \"pal-\", \"ntsc-\" or \"film-\",\n");
fprintf(stderr, "or set a framerate with \"-r xxx\".\n");
@@ -3659,9 +3659,9 @@ static void opt_target(const char *arg)
opt_audio_codec("mp2");
opt_format("vcd");
- opt_frame_size(norm ? "352x240" : "352x288");
+ opt_frame_size(norm != PAL ? "352x240" : "352x288");
opt_frame_rate(NULL, frame_rates[norm]);
- opt_default("g", norm ? "18" : "15");
+ opt_default("g", norm != PAL ? "18" : "15");
opt_default("b", "1150000");
opt_default("maxrate", "1150000");
@@ -3687,9 +3687,9 @@ static void opt_target(const char *arg)
opt_audio_codec("mp2");
opt_format("svcd");
- opt_frame_size(norm ? "480x480" : "480x576");
+ opt_frame_size(norm != PAL ? "480x480" : "480x576");
opt_frame_rate(NULL, frame_rates[norm]);
- opt_default("g", norm ? "18" : "15");
+ opt_default("g", norm != PAL ? "18" : "15");
opt_default("b", "2040000");
opt_default("maxrate", "2516000");
@@ -3709,9 +3709,9 @@ static void opt_target(const char *arg)
opt_audio_codec("ac3");
opt_format("dvd");
- opt_frame_size(norm ? "720x480" : "720x576");
+ opt_frame_size(norm != PAL ? "720x480" : "720x576");
opt_frame_rate(NULL, frame_rates[norm]);
- opt_default("g", norm ? "18" : "15");
+ opt_default("g", norm != PAL ? "18" : "15");
opt_default("b", "6000000");
opt_default("maxrate", "9000000");
@@ -3728,9 +3728,9 @@ static void opt_target(const char *arg)
opt_format("dv");
- opt_frame_size(norm ? "720x480" : "720x576");
+ opt_frame_size(norm != PAL ? "720x480" : "720x576");
opt_frame_pix_fmt(!strncmp(arg, "dv50", 4) ? "yuv422p" :
- (norm ? "yuv411p" : "yuv420p"));
+ (norm != PAL ? "yuv411p" : "yuv420p"));
opt_frame_rate(NULL, frame_rates[norm]);
audio_sample_rate = 48000;
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