#include "avcodec.h"
#include "ass.h"
+#include "libavutil/opt.h"
#include "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/bprint.h"
#define TOP_CENTER 8
#define TOP_RIGHT 9
+#define RGB_TO_BGR(c) (((c) & 0xff) << 16 | ((c) & 0xff00) | (((c) >> 16) & 0xff))
+
typedef struct {
- char *font;
- int fontsize;
+ uint16_t fontID;
+ const char *font;
+ uint8_t fontsize;
int color;
+ uint8_t alpha;
int back_color;
- int bold;
- int italic;
- int underline;
+ uint8_t back_alpha;
+ uint8_t bold;
+ uint8_t italic;
+ uint8_t underline;
int alignment;
} MovTextDefault;
uint16_t style_start;
uint16_t style_end;
uint8_t style_flag;
+ uint8_t bold;
+ uint8_t italic;
+ uint8_t underline;
+ int color;
+ uint8_t alpha;
uint8_t fontsize;
uint16_t style_fontID;
} StyleBox;
} TextWrapBox;
typedef struct {
+ AVClass *class;
StyleBox **s;
StyleBox *s_temp;
HighlightBox h;
int size_var;
int count_s, count_f;
int readorder;
+ int frame_width;
+ int frame_height;
} MovTextContext;
typedef struct {
uint8_t *tx3g_ptr = avctx->extradata;
int i, box_size, font_length;
int8_t v_align, h_align;
- int style_fontID;
StyleBox s_default;
m->count_f = 0;
}
// Background Color
m->d.back_color = AV_RB24(tx3g_ptr);
- tx3g_ptr += 4;
+ tx3g_ptr += 3;
+ m->d.back_alpha = AV_RB8(tx3g_ptr);
+ tx3g_ptr += 1;
// BoxRecord
tx3g_ptr += 8;
// StyleRecord
tx3g_ptr += 4;
// fontID
- style_fontID = AV_RB16(tx3g_ptr);
+ m->d.fontID = AV_RB16(tx3g_ptr);
tx3g_ptr += 2;
// face-style-flags
s_default.style_flag = *tx3g_ptr++;
- m->d.bold = s_default.style_flag & STYLE_FLAG_BOLD;
- m->d.italic = s_default.style_flag & STYLE_FLAG_ITALIC;
- m->d.underline = s_default.style_flag & STYLE_FLAG_UNDERLINE;
+ m->d.bold = !!(s_default.style_flag & STYLE_FLAG_BOLD);
+ m->d.italic = !!(s_default.style_flag & STYLE_FLAG_ITALIC);
+ m->d.underline = !!(s_default.style_flag & STYLE_FLAG_UNDERLINE);
// fontsize
m->d.fontsize = *tx3g_ptr++;
// Primary color
m->d.color = AV_RB24(tx3g_ptr);
- tx3g_ptr += 4;
+ tx3g_ptr += 3;
+ m->d.alpha = AV_RB8(tx3g_ptr);
+ tx3g_ptr += 1;
// FontRecord
// FontRecord Size
tx3g_ptr += 4;
m->ftab_temp = NULL;
tx3g_ptr = tx3g_ptr + font_length;
}
+ // In case of broken header, init default font
+ m->d.font = ASS_DEFAULT_FONT;
for (i = 0; i < m->ftab_entries; i++) {
- if (style_fontID == m->ftab[i]->fontID)
+ if (m->d.fontID == m->ftab[i]->fontID)
m->d.font = m->ftab[i]->font;
}
return 0;
m->s_temp->style_start = AV_RB16(tsmb);
tsmb += 2;
m->s_temp->style_end = AV_RB16(tsmb);
+
+ if ( m->s_temp->style_end < m->s_temp->style_start
+ || (m->count_s && m->s_temp->style_start < m->s[m->count_s - 1]->style_end)) {
+ av_freep(&m->s_temp);
+ mov_text_cleanup(m);
+ return AVERROR(ENOMEM);
+ }
+
tsmb += 2;
m->s_temp->style_fontID = AV_RB16(tsmb);
tsmb += 2;
m->s_temp->style_flag = AV_RB8(tsmb);
+ m->s_temp->bold = !!(m->s_temp->style_flag & STYLE_FLAG_BOLD);
+ m->s_temp->italic = !!(m->s_temp->style_flag & STYLE_FLAG_ITALIC);
+ m->s_temp->underline = !!(m->s_temp->style_flag & STYLE_FLAG_UNDERLINE);
tsmb++;
m->s_temp->fontsize = AV_RB8(tsmb);
+ tsmb++;
+ m->s_temp->color = AV_RB24(tsmb);
+ tsmb += 3;
+ m->s_temp->alpha = AV_RB8(tsmb);
+ tsmb++;
av_dynarray_add(&m->s, &m->count_s, m->s_temp);
if(!m->s) {
mov_text_cleanup(m);
return AVERROR(ENOMEM);
}
- tsmb++;
- // text-color-rgba
- tsmb += 4;
}
return 0;
}
const static size_t box_count = FF_ARRAY_ELEMS(box_types);
+// Return byte length of the UTF-8 sequence starting at text[0]. 0 on error.
+static int get_utf8_length_at(const char *text, const char *text_end)
+{
+ const char *start = text;
+ int err = 0;
+ uint32_t c;
+ GET_UTF8(c, text < text_end ? (uint8_t)*text++ : (err = 1, 0), goto error;);
+ if (err)
+ goto error;
+ return text - start;
+error:
+ return 0;
+}
+
static int text_to_ass(AVBPrint *buf, const char *text, const char *text_end,
- MovTextContext *m)
+ AVCodecContext *avctx)
{
+ MovTextContext *m = avctx->priv_data;
int i = 0;
- int j = 0;
int text_pos = 0;
+ int style_active = 0;
+ int entry = 0;
+ int color = m->d.color;
if (text < text_end && m->box_flags & TWRP_BOX) {
if (m->w.wrap_flag == 1) {
}
while (text < text_end) {
- if (m->box_flags & STYL_BOX) {
- for (i = 0; i < m->style_entries; i++) {
- if (m->s[i]->style_flag && text_pos == m->s[i]->style_end) {
- av_bprintf(buf, "{\\r}");
+ int len;
+
+ if ((m->box_flags & STYL_BOX) && entry < m->style_entries) {
+ if (text_pos == m->s[entry]->style_start) {
+ style_active = 1;
+ if (m->s[entry]->bold ^ m->d.bold)
+ av_bprintf(buf, "{\\b%d}", m->s[entry]->bold);
+ if (m->s[entry]->italic ^ m->d.italic)
+ av_bprintf(buf, "{\\i%d}", m->s[entry]->italic);
+ if (m->s[entry]->underline ^ m->d.underline)
+ av_bprintf(buf, "{\\u%d}", m->s[entry]->underline);
+ if (m->s[entry]->fontsize != m->d.fontsize)
+ av_bprintf(buf, "{\\fs%d}", m->s[entry]->fontsize);
+ if (m->s[entry]->style_fontID != m->d.fontID)
+ for (i = 0; i < m->ftab_entries; i++) {
+ if (m->s[entry]->style_fontID == m->ftab[i]->fontID)
+ av_bprintf(buf, "{\\fn%s}", m->ftab[i]->font);
+ }
+ if (m->d.color != m->s[entry]->color) {
+ color = m->s[entry]->color;
+ av_bprintf(buf, "{\\1c&H%X&}", RGB_TO_BGR(color));
}
+ if (m->d.alpha != m->s[entry]->alpha)
+ av_bprintf(buf, "{\\1a&H%02X&}", 255 - m->s[entry]->alpha);
}
- for (i = 0; i < m->style_entries; i++) {
- if (m->s[i]->style_flag && text_pos == m->s[i]->style_start) {
- if (m->s[i]->style_flag & STYLE_FLAG_BOLD)
- av_bprintf(buf, "{\\b1}");
- if (m->s[i]->style_flag & STYLE_FLAG_ITALIC)
- av_bprintf(buf, "{\\i1}");
- if (m->s[i]->style_flag & STYLE_FLAG_UNDERLINE)
- av_bprintf(buf, "{\\u1}");
- av_bprintf(buf, "{\\fs%d}", m->s[i]->fontsize);
- for (j = 0; j < m->ftab_entries; j++) {
- if (m->s[i]->style_fontID == m->ftab[j]->fontID)
- av_bprintf(buf, "{\\fn%s}", m->ftab[j]->font);
- }
+ if (text_pos == m->s[entry]->style_end) {
+ if (style_active) {
+ av_bprintf(buf, "{\\r}");
+ style_active = 0;
+ color = m->d.color;
}
+ entry++;
}
}
if (m->box_flags & HLIT_BOX) {
}
if (text_pos == m->h.hlit_end) {
if (m->box_flags & HCLR_BOX) {
- av_bprintf(buf, "{\\2c&H000000&}");
+ av_bprintf(buf, "{\\2c&H%X&}", RGB_TO_BGR(m->d.color));
} else {
- av_bprintf(buf, "{\\1c&HFFFFFF&}{\\2c&H000000&}");
+ av_bprintf(buf, "{\\1c&H%X&}{\\2c&H%X&}",
+ RGB_TO_BGR(color), RGB_TO_BGR(m->d.color));
}
}
}
- switch (*text) {
- case '\r':
- break;
- case '\n':
- av_bprintf(buf, "\\N");
- break;
- default:
- av_bprint_chars(buf, *text, 1);
- break;
+ len = get_utf8_length_at(text, text_end);
+ if (len < 1) {
+ av_log(avctx, AV_LOG_ERROR, "invalid UTF-8 byte in subtitle\n");
+ len = 1;
+ }
+ for (i = 0; i < len; i++) {
+ switch (*text) {
+ case '\r':
+ break;
+ case '\n':
+ av_bprintf(buf, "\\N");
+ break;
+ default:
+ av_bprint_chars(buf, *text, 1);
+ break;
+ }
+ text++;
}
- text++;
text_pos++;
}
MovTextContext *m = avctx->priv_data;
ret = mov_text_tx3g(avctx, m);
if (ret == 0) {
- return ff_ass_subtitle_header(avctx, m->d.font, m->d.fontsize, m->d.color,
- m->d.back_color, m->d.bold, m->d.italic,
- m->d.underline, ASS_DEFAULT_BORDERSTYLE,
- m->d.alignment);
+ if (!m->frame_width || !m->frame_height) {
+ m->frame_width = ASS_DEFAULT_PLAYRESX;
+ m->frame_height = ASS_DEFAULT_PLAYRESY;
+ }
+ return ff_ass_subtitle_header_full(avctx,
+ m->frame_width, m->frame_height,
+ m->d.font, m->d.fontsize,
+ (255 - m->d.alpha) << 24 | RGB_TO_BGR(m->d.color),
+ (255 - m->d.alpha) << 24 | RGB_TO_BGR(m->d.color),
+ (255 - m->d.back_alpha) << 24 | RGB_TO_BGR(m->d.back_color),
+ (255 - m->d.back_alpha) << 24 | RGB_TO_BGR(m->d.back_color),
+ m->d.bold, m->d.italic, m->d.underline,
+ ASS_DEFAULT_BORDERSTYLE, m->d.alignment);
} else
return ff_ass_subtitle_header_default(avctx);
}
}
m->tracksize = m->tracksize + tsmb_size;
}
- text_to_ass(&buf, ptr, end, m);
+ text_to_ass(&buf, ptr, end, avctx);
mov_text_cleanup(m);
} else
- text_to_ass(&buf, ptr, end, m);
+ text_to_ass(&buf, ptr, end, avctx);
ret = ff_ass_add_rect(sub, buf.str, m->readorder++, 0, NULL, NULL);
av_bprint_finalize(&buf, NULL);
m->readorder = 0;
}
+#define OFFSET(x) offsetof(MovTextContext, x)
+#define FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_SUBTITLE_PARAM
+static const AVOption options[] = {
+ { "width", "Frame width, usually video width", OFFSET(frame_width), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
+ { "height", "Frame height, usually video height", OFFSET(frame_height), AV_OPT_TYPE_INT, {.i64=0}, 0, INT_MAX, FLAGS },
+ { NULL },
+};
+
+static const AVClass mov_text_decoder_class = {
+ .class_name = "MOV text decoder",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
AVCodec ff_movtext_decoder = {
.name = "mov_text",
.long_name = NULL_IF_CONFIG_SMALL("3GPP Timed Text subtitle"),
.type = AVMEDIA_TYPE_SUBTITLE,
.id = AV_CODEC_ID_MOV_TEXT,
.priv_data_size = sizeof(MovTextContext),
+ .priv_class = &mov_text_decoder_class,
.init = mov_text_init,
.decode = mov_text_decode_frame,
.close = mov_text_decode_close,
projects / ffmpeg / blobdiff