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ffmpeg.wasm-core
Commit 813b2f0d authored by Niklesh's avatar Niklesh Committed by Philip Langdale
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movtextdec.c: Improve upon dynarrays and text_to_ass 

Signed-off-by: 's avatarNiklesh <niklesh.lalwani@iitb.ac.in>
parent 76043580
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Showing with 56 additions and 45 deletions
libavcodec/movtextdec.c
View file @ 813b2f0d
...@@ -27,23 +27,40 @@ ...@@ -27,23 +27,40 @@
#include "libavutil/intreadwrite.h" #include "libavutil/intreadwrite.h"
#include "libavutil/mem.h" #include "libavutil/mem.h"
#define STYLE_FLAG_BOLD 1 #define STYLE_FLAG_BOLD (1<<0)
#define STYLE_FLAG_ITALIC 2 #define STYLE_FLAG_ITALIC (1<<1)
#define STYLE_FLAG_UNDERLINE 4 #define STYLE_FLAG_UNDERLINE (1<<2)
typedef struct {
uint16_t style_start;
uint16_t style_end;
uint8_t style_flag;
} StyleBox;
static int text_to_ass(AVBPrint *buf, const char *text, const char *text_end, static int text_to_ass(AVBPrint *buf, const char *text, const char *text_end,
char **style_start, char **style_end, StyleBox **s, int style_entries)
uint8_t **style_flags, int style_entries)
{ {
int i = 0; int i = 0;
int text_pos = 0;
while (text < text_end) { while (text < text_end) {
for (i = 0; i < style_entries; i++) { for (i = 0; i < style_entries; i++) {
if (*style_flags[i] && text == style_start[i]) { if (s[i]->style_flag && text_pos == s[i]->style_end) {
if (*style_flags[i] & STYLE_FLAG_BOLD) if (s[i]->style_flag & STYLE_FLAG_BOLD)
av_bprintf(buf, "{\\b0}");
if (s[i]->style_flag & STYLE_FLAG_ITALIC)
av_bprintf(buf, "{\\i0}");
if (s[i]->style_flag & STYLE_FLAG_UNDERLINE)
av_bprintf(buf, "{\\u0}");
}
}
for (i = 0; i < style_entries; i++) {
if (s[i]->style_flag && text_pos == s[i]->style_start) {
if (s[i]->style_flag & STYLE_FLAG_BOLD)
av_bprintf(buf, "{\\b1}"); av_bprintf(buf, "{\\b1}");
if (*style_flags[i] & STYLE_FLAG_ITALIC) if (s[i]->style_flag & STYLE_FLAG_ITALIC)
av_bprintf(buf, "{\\i1}"); av_bprintf(buf, "{\\i1}");
if (*style_flags[i] & STYLE_FLAG_UNDERLINE) if (s[i]->style_flag & STYLE_FLAG_UNDERLINE)
av_bprintf(buf, "{\\u1}"); av_bprintf(buf, "{\\u1}");
} }
} }
...@@ -58,18 +75,8 @@ static int text_to_ass(AVBPrint *buf, const char *text, const char *text_end, ...@@ -58,18 +75,8 @@ static int text_to_ass(AVBPrint *buf, const char *text, const char *text_end,
av_bprint_chars(buf, *text, 1); av_bprint_chars(buf, *text, 1);
break; break;
} }
for (i = 0; i < style_entries; i++) {
if (*style_flags[i] && text == style_end[i]) {
if (*style_flags[i] & STYLE_FLAG_BOLD)
av_bprintf(buf, "{\\b0}");
if (*style_flags[i] & STYLE_FLAG_ITALIC)
av_bprintf(buf, "{\\i0}");
if (*style_flags[i] & STYLE_FLAG_UNDERLINE)
av_bprintf(buf, "{\\u0}");
}
}
text++; text++;
text_pos++;
} }
return 0; return 0;
...@@ -96,13 +103,10 @@ static int mov_text_decode_frame(AVCodecContext *avctx, ...@@ -96,13 +103,10 @@ static int mov_text_decode_frame(AVCodecContext *avctx,
//char *ptr_temp; //char *ptr_temp;
int text_length, tsmb_type, style_entries; int text_length, tsmb_type, style_entries;
uint64_t tsmb_size, tracksize; uint64_t tsmb_size, tracksize;
char **style_start = { 0, }; StyleBox **s = {0, };
char **style_end = { 0, }; StyleBox *s_temp;
uint8_t **style_flags = { 0, };
const uint8_t *tsmb; const uint8_t *tsmb;
int index, i, size_var; int count, i, size_var;
uint8_t *flag;
char *style_pos;
if (!ptr || avpkt->size < 2) if (!ptr || avpkt->size < 2)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
...@@ -168,42 +172,39 @@ static int mov_text_decode_frame(AVCodecContext *avctx, ...@@ -168,42 +172,39 @@ static int mov_text_decode_frame(AVCodecContext *avctx,
// A single style record is of length 12 bytes. // A single style record is of length 12 bytes.
if (tracksize + size_var + style_entries * 12 > avpkt->size) if (tracksize + size_var + style_entries * 12 > avpkt->size)
break; break;
count = 0;
for(i = 0; i < style_entries; i++) { for(i = 0; i < style_entries; i++) {
style_pos = ptr + AV_RB16(tsmb); s_temp = av_malloc(sizeof(*s_temp));
index = i; if (!s_temp)
av_dynarray_add(&style_start, &index, style_pos); goto error;
s_temp->style_start = AV_RB16(tsmb);
tsmb += 2; tsmb += 2;
style_pos = ptr + AV_RB16(tsmb); s_temp->style_end = AV_RB16(tsmb);
index = i;
av_dynarray_add(&style_end, &index, style_pos);
tsmb += 2; tsmb += 2;
// fontID = AV_RB16(tsmb); // fontID = AV_RB16(tsmb);
tsmb += 2; tsmb += 2;
flag = av_malloc(1); s_temp->style_flag = AV_RB8(tsmb);
if (!flag) av_dynarray_add(&s, &count, s_temp);
return AVERROR(ENOMEM); if(!s)
*flag = AV_RB8(tsmb); goto error;
index = i;
av_dynarray_add(&style_flags, &index, flag);
//fontsize=AV_RB8(tsmb); //fontsize=AV_RB8(tsmb);
tsmb += 2; tsmb += 2;
// text-color-rgba // text-color-rgba
tsmb += 4; tsmb += 4;
} }
text_to_ass(&buf, ptr, end, style_start, style_end, style_flags, style_entries); text_to_ass(&buf, ptr, end, s, style_entries);
for(i = 0; i < style_entries; i++) { for(i = 0; i < count; i++) {
av_freep(&style_flags[i]); av_freep(&s[i]);
} }
av_freep(&style_start); av_freep(&s);
av_freep(&style_end);
av_freep(&style_flags);
} }
tracksize = tracksize + tsmb_size; tracksize = tracksize + tsmb_size;
} }
} else } else
text_to_ass(&buf, ptr, end, NULL, NULL, 0, 0); text_to_ass(&buf, ptr, end, NULL, 0);
ret = ff_ass_add_rect_bprint(sub, &buf, ts_start, ts_end - ts_start); ret = ff_ass_add_rect_bprint(sub, &buf, ts_start, ts_end - ts_start);
av_bprint_finalize(&buf, NULL); av_bprint_finalize(&buf, NULL);
...@@ -211,6 +212,16 @@ static int mov_text_decode_frame(AVCodecContext *avctx, ...@@ -211,6 +212,16 @@ static int mov_text_decode_frame(AVCodecContext *avctx,
return ret; return ret;
*got_sub_ptr = sub->num_rects > 0; *got_sub_ptr = sub->num_rects > 0;
return avpkt->size; return avpkt->size;
error:
for(i = 0; i < count; i++) {
av_freep(&s[i]);
}
av_freep(&s);
if (s_temp)
av_freep(&s_temp);
av_bprint_finalize(&buf, NULL);
return AVERROR(ENOMEM);
} }
AVCodec ff_movtext_decoder = { AVCodec ff_movtext_decoder = {
......
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