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ffmpeg.wasm-core
Commit 3ec5d8fe authored by Aman Gupta's avatar Aman Gupta Committed by Michael Niedermayer
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libavcodec/ccaption_dec: rewrite packet handler as case statement; remove COR3 macro 

Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
parent 55ca79f5
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Showing with 53 additions and 39 deletions
libavcodec/ccaption_dec.c
View file @ 3ec5d8fe
......@@ -453,54 +453,69 @@ static void handle_char(CCaptionSubContext *ctx, char hi, char lo, int64_t pts)
static int process_cc608(CCaptionSubContext *ctx, int64_t pts, uint8_t hi, uint8_t lo)
{
int ret = 0;
#define COR3(var, with1, with2, with3) ( (var) == (with1) || (var) == (with2) || (var) == (with3) )
if (hi == ctx->prev_cmd[0] && lo == ctx->prev_cmd[1]) {
/* ignore redundant command */
/* ignore redundant command */
} else if ( (hi == 0x10 && (lo >= 0x40 || lo <= 0x5f)) ||
( (hi >= 0x11 && hi <= 0x17) && (lo >= 0x40 && lo <= 0x7f) ) ) {
handle_pac(ctx, hi, lo);
} else if ( ( hi == 0x11 && lo >= 0x20 && lo <= 0x2f ) ||
( hi == 0x17 && lo >= 0x2e && lo <= 0x2f) ) {
handle_textattr(ctx, hi, lo);
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x20 ) {
/* resume caption loading */
ctx->mode = CCMODE_POPON;
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x24 ) {
handle_delete_end_of_row(ctx, hi, lo);
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x25 ) {
ctx->rollup = 2;
ctx->mode = CCMODE_ROLLUP_2;
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x26 ) {
ctx->rollup = 3;
ctx->mode = CCMODE_ROLLUP_3;
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x27 ) {
ctx->rollup = 4;
ctx->mode = CCMODE_ROLLUP_4;
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x29 ) {
/* resume direct captioning */
ctx->mode = CCMODE_PAINTON;
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x2B ) {
/* resume text display */
ctx->mode = CCMODE_TEXT;
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x2C ) {
/* erase display memory */
ret = handle_edm(ctx, pts);
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x2D ) {
/* carriage return */
ff_dlog(ctx, "carriage return\n");
reap_screen(ctx, pts);
roll_up(ctx);
ctx->screen_changed = 1;
ctx->cursor_column = 0;
} else if ( COR3(hi, 0x14, 0x15, 0x1C) && lo == 0x2F ) {
/* end of caption */
ff_dlog(ctx, "handle_eoc\n");
ret = handle_eoc(ctx, pts);
} else if (hi == 0x14 || hi == 0x15 || hi == 0x1c) {
switch (lo) {
case 0x20:
/* resume caption loading */
ctx->mode = CCMODE_POPON;
break;
case 0x24:
handle_delete_end_of_row(ctx, hi, lo);
break;
case 0x25:
ctx->rollup = 2;
ctx->mode = CCMODE_ROLLUP_2;
break;
case 0x26:
ctx->rollup = 3;
ctx->mode = CCMODE_ROLLUP_3;
break;
case 0x27:
ctx->rollup = 4;
ctx->mode = CCMODE_ROLLUP_4;
break;
case 0x29:
/* resume direct captioning */
ctx->mode = CCMODE_PAINTON;
break;
case 0x2b:
/* resume text display */
ctx->mode = CCMODE_TEXT;
break;
case 0x2c:
/* erase display memory */
ret = handle_edm(ctx, pts);
break;
case 0x2d:
/* carriage return */
ff_dlog(ctx, "carriage return\n");
reap_screen(ctx, pts);
roll_up(ctx);
ctx->screen_changed = 1;
ctx->cursor_column = 0;
break;
case 0x2f:
/* end of caption */
ff_dlog(ctx, "handle_eoc\n");
ret = handle_eoc(ctx, pts);
break;
default:
ff_dlog(ctx, "Unknown command 0x%hhx 0x%hhx\n", hi, lo);
break;
}
} else if (hi>=0x20) {
/* Standard characters (always in pairs) */
/* Standard characters (always in pairs) */
handle_char(ctx, hi, lo, pts);
} else {
/* Ignoring all other non data code */
/* Ignoring all other non data code */
ff_dlog(ctx, "Unknown command 0x%hhx 0x%hhx\n", hi, lo);
}
......@@ -508,7 +523,6 @@ static int process_cc608(CCaptionSubContext *ctx, int64_t pts, uint8_t hi, uint8
ctx->prev_cmd[0] = hi;
ctx->prev_cmd[1] = lo;
#undef COR3
return ret;
}
......
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