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avformat/mccenc: Deduplicate strings

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Reviewed-by: Jacob Lifshay <programmerjake@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-09-19 19:53:33 +02:00
parent d81a971b35
commit 159330016c
1 changed files with 41 additions and 81 deletions
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122
libavformat/mccenc.c
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@@ -58,83 +58,47 @@ typedef enum MCCVersion
MCC_VERSION_MAX = MCC_VERSION_2,
} MCCVersion;
static const char mcc_header_v1[] = //
"File Format=MacCaption_MCC V1.0\n"
"\n"
#define MCC_HEADER \
"File Format=MacCaption_MCC V%c.0\n" \
"\n" \
"///////////////////////////////////////////////////////////////////////////////////\n" \
"// Computer Prompting and Captioning Company\n" \
"// Ancillary Data Packet Transfer File\n" \
"//\n" \
"// Permission to generate this format is granted provided that\n" \
"// 1. This ANC Transfer file format is used on an as-is basis and no warranty is given, and\n" \
"// 2. This entire descriptive information text is included in a generated .mcc file.\n" \
"//\n" \
"// General file format:\n" \
"// HH:MM:SS:FF(tab)[Hexadecimal ANC data in groups of 2 characters]\n" \
"// Hexadecimal data starts with the Ancillary Data Packet DID (Data ID defined in S291M)\n" \
"// and concludes with the Check Sum following the User Data Words.\n" \
"// Each time code line must contain at most one complete ancillary data packet.\n" \
"// To transfer additional ANC Data successive lines may contain identical time code.\n" \
"// Time Code Rate=[24, 25, 30, 30DF, 50, 60%s]\n" \
"//\n" \
"// ANC data bytes may be represented by one ASCII character according to the following schema:\n" \
"// G FAh 00h 00h\n" \
"// H 2 x (FAh 00h 00h)\n" \
"// I 3 x (FAh 00h 00h)\n" \
"// J 4 x (FAh 00h 00h)\n" \
"// K 5 x (FAh 00h 00h)\n" \
"// L 6 x (FAh 00h 00h)\n" \
"// M 7 x (FAh 00h 00h)\n" \
"// N 8 x (FAh 00h 00h)\n" \
"// O 9 x (FAh 00h 00h)\n" \
"// P FBh 80h 80h\n" \
"// Q FCh 80h 80h\n" \
"// R FDh 80h 80h\n" \
"// S 96h 69h\n" \
"// T 61h 01h\n" \
"// U E1h 00h 00h 00h\n" \
"// Z 00h\n" \
"//\n" \
"///////////////////////////////////////////////////////////////////////////////////\n"
"// Computer Prompting and Captioning Company\n"
"// Ancillary Data Packet Transfer File\n"
"//\n"
"// Permission to generate this format is granted provided that\n"
"// 1. This ANC Transfer file format is used on an as-is basis and no warranty is given, and\n"
"// 2. This entire descriptive information text is included in a generated .mcc file.\n"
"//\n"
"// General file format:\n"
"// HH:MM:SS:FF(tab)[Hexadecimal ANC data in groups of 2 characters]\n"
"// Hexadecimal data starts with the Ancillary Data Packet DID (Data ID defined in S291M)\n"
"// and concludes with the Check Sum following the User Data Words.\n"
"// Each time code line must contain at most one complete ancillary data packet.\n"
"// To transfer additional ANC Data successive lines may contain identical time code.\n"
"// Time Code Rate=[24, 25, 30, 30DF, 50, 60]\n"
"//\n"
"// ANC data bytes may be represented by one ASCII character according to the following schema:\n"
"// G FAh 00h 00h\n"
"// H 2 x (FAh 00h 00h)\n"
"// I 3 x (FAh 00h 00h)\n"
"// J 4 x (FAh 00h 00h)\n"
"// K 5 x (FAh 00h 00h)\n"
"// L 6 x (FAh 00h 00h)\n"
"// M 7 x (FAh 00h 00h)\n"
"// N 8 x (FAh 00h 00h)\n"
"// O 9 x (FAh 00h 00h)\n"
"// P FBh 80h 80h\n"
"// Q FCh 80h 80h\n"
"// R FDh 80h 80h\n"
"// S 96h 69h\n"
"// T 61h 01h\n"
"// U E1h 00h 00h 00h\n"
"// Z 00h\n"
"//\n"
"///////////////////////////////////////////////////////////////////////////////////\n";
static const char mcc_header_v2[] = //
"File Format=MacCaption_MCC V2.0\n"
"\n"
"///////////////////////////////////////////////////////////////////////////////////\n"
"// Computer Prompting and Captioning Company\n"
"// Ancillary Data Packet Transfer File\n"
"//\n"
"// Permission to generate this format is granted provided that\n"
"// 1. This ANC Transfer file format is used on an as-is basis and no warranty is given, and\n"
"// 2. This entire descriptive information text is included in a generated .mcc file.\n"
"//\n"
"// General file format:\n"
"// HH:MM:SS:FF(tab)[Hexadecimal ANC data in groups of 2 characters]\n"
"// Hexadecimal data starts with the Ancillary Data Packet DID (Data ID defined in S291M)\n"
"// and concludes with the Check Sum following the User Data Words.\n"
"// Each time code line must contain at most one complete ancillary data packet.\n"
"// To transfer additional ANC Data successive lines may contain identical time code.\n"
"// Time Code Rate=[24, 25, 30, 30DF, 50, 60, 60DF]\n"
"//\n"
"// ANC data bytes may be represented by one ASCII character according to the following schema:\n"
"// G FAh 00h 00h\n"
"// H 2 x (FAh 00h 00h)\n"
"// I 3 x (FAh 00h 00h)\n"
"// J 4 x (FAh 00h 00h)\n"
"// K 5 x (FAh 00h 00h)\n"
"// L 6 x (FAh 00h 00h)\n"
"// M 7 x (FAh 00h 00h)\n"
"// N 8 x (FAh 00h 00h)\n"
"// O 9 x (FAh 00h 00h)\n"
"// P FBh 80h 80h\n"
"// Q FCh 80h 80h\n"
"// R FDh 80h 80h\n"
"// S 96h 69h\n"
"// T 61h 01h\n"
"// U E1h 00h 00h 00h\n"
"// Z 00h\n"
"//\n"
"///////////////////////////////////////////////////////////////////////////////////\n";
#define MCC_HEADER_PRINTF_ARGS(mcc_version) (mcc_version) + '0', \
(mcc_version) == MCC_VERSION_1 ? "" : ", 60DF"
/**
* generated with the bash command:
@@ -158,7 +122,6 @@ static const AVRational valid_time_code_rates[] = {
static int mcc_write_header(AVFormatContext *avf)
{
MCCContext *mcc = avf->priv_data;
const char *mcc_header = mcc_header_v1;
switch ((MCCVersion)mcc->mcc_version) {
case MCC_VERSION_1:
if (mcc->timecode.fps == 60 && mcc->timecode.flags & AV_TIMECODE_FLAG_DROPFRAME) {
@@ -166,9 +129,6 @@ static int mcc_write_header(AVFormatContext *avf)
return AVERROR(EINVAL);
}
break;
case MCC_VERSION_2:
mcc_header = mcc_header_v2;
break;
}
const char *creation_program = mcc->creation_program;
if (!creation_program) {
@@ -218,13 +178,13 @@ static int mcc_write_header(AVFormatContext *avf)
const char *weekday = weekdays[tm.tm_wday];
avio_printf(avf->pb,
"%s\n"
MCC_HEADER "\n"
"UUID=%s\n"
"Creation Program=%s\n"
"Creation Date=%s, %s %d, %d\n"
"Creation Time=%02d:%02d:%02d\n"
"Time Code Rate=%u%s\n\n",
mcc_header,
MCC_HEADER_PRINTF_ARGS(mcc->mcc_version),
mcc_ffmpeg_uuid,
creation_program,
weekday,