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Diffstat (limited to 'ffmpeg1/libavcodec/microdvddec.c')
-rw-r--r--ffmpeg1/libavcodec/microdvddec.c377
1 files changed, 0 insertions, 377 deletions
diff --git a/ffmpeg1/libavcodec/microdvddec.c b/ffmpeg1/libavcodec/microdvddec.c
deleted file mode 100644
index f3c640f..0000000
--- a/ffmpeg1/libavcodec/microdvddec.c
+++ /dev/null
@@ -1,377 +0,0 @@
-/*
- * Copyright (c) 2012 Clément Bœsch
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * MicroDVD subtitle decoder
- *
- * Based on the specifications found here:
- * https://trac.videolan.org/vlc/ticket/1825#comment:6
- */
-
-#include "libavutil/avstring.h"
-#include "libavutil/parseutils.h"
-#include "libavutil/bprint.h"
-#include "avcodec.h"
-#include "ass.h"
-
-static int indexof(const char *s, int c)
-{
- char *f = strchr(s, c);
- return f ? (f - s) : -1;
-}
-
-struct microdvd_tag {
- char key;
- int persistent;
- uint32_t data1;
- uint32_t data2;
- char *data_string;
- int data_string_len;
-};
-
-#define MICRODVD_PERSISTENT_OFF 0
-#define MICRODVD_PERSISTENT_ON 1
-#define MICRODVD_PERSISTENT_OPENED 2
-
-// Color, Font, Size, cHarset, stYle, Position, cOordinate
-#define MICRODVD_TAGS "cfshyYpo"
-
-static void microdvd_set_tag(struct microdvd_tag *tags, struct microdvd_tag tag)
-{
- int tag_index = indexof(MICRODVD_TAGS, tag.key);
-
- if (tag_index < 0)
- return;
- memcpy(&tags[tag_index], &tag, sizeof(tag));
-}
-
-// italic, bold, underline, strike-through
-#define MICRODVD_STYLES "ibus"
-
-static char *microdvd_load_tags(struct microdvd_tag *tags, char *s)
-{
- while (*s == '{') {
- char *start = s;
- char tag_char = *(s + 1);
- struct microdvd_tag tag = {0};
-
- if (!tag_char || *(s + 2) != ':')
- break;
- s += 3;
-
- switch (tag_char) {
-
- /* Style */
- case 'Y':
- tag.persistent = MICRODVD_PERSISTENT_ON;
- case 'y':
- while (*s && *s != '}') {
- int style_index = indexof(MICRODVD_STYLES, *s);
-
- if (style_index >= 0)
- tag.data1 |= (1 << style_index);
- s++;
- }
- if (*s != '}')
- break;
- /* We must distinguish persistent and non-persistent styles
- * to handle this kind of style tags: {y:ib}{Y:us} */
- tag.key = tag_char;
- break;
-
- /* Color */
- case 'C':
- tag.persistent = MICRODVD_PERSISTENT_ON;
- case 'c':
- if (*s == '$')
- s++;
- tag.data1 = strtol(s, &s, 16) & 0x00ffffff;
- if (*s != '}')
- break;
- tag.key = 'c';
- break;
-
- /* Font name */
- case 'F':
- tag.persistent = MICRODVD_PERSISTENT_ON;
- case 'f': {
- int len = indexof(s, '}');
- if (len < 0)
- break;
- tag.data_string = s;
- tag.data_string_len = len;
- s += len;
- tag.key = 'f';
- break;
- }
-
- /* Font size */
- case 'S':
- tag.persistent = MICRODVD_PERSISTENT_ON;
- case 's':
- tag.data1 = strtol(s, &s, 10);
- if (*s != '}')
- break;
- tag.key = 's';
- break;
-
- /* Charset */
- case 'H': {
- //TODO: not yet handled, just parsed.
- int len = indexof(s, '}');
- if (len < 0)
- break;
- tag.data_string = s;
- tag.data_string_len = len;
- s += len;
- tag.key = 'h';
- break;
- }
-
- /* Position */
- case 'P':
- tag.persistent = MICRODVD_PERSISTENT_ON;
- tag.data1 = (*s++ == '1');
- if (*s != '}')
- break;
- tag.key = 'p';
- break;
-
- /* Coordinates */
- case 'o':
- tag.persistent = MICRODVD_PERSISTENT_ON;
- tag.data1 = strtol(s, &s, 10);
- if (*s != ',')
- break;
- s++;
- tag.data2 = strtol(s, &s, 10);
- if (*s != '}')
- break;
- tag.key = 'o';
- break;
-
- default: /* Unknown tag, we consider it's text */
- break;
- }
-
- if (tag.key == 0)
- return start;
-
- microdvd_set_tag(tags, tag);
- s++;
- }
- return s;
-}
-
-static void microdvd_open_tags(AVBPrint *new_line, struct microdvd_tag *tags)
-{
- int i, sidx;
- for (i = 0; i < sizeof(MICRODVD_TAGS) - 1; i++) {
- if (tags[i].persistent == MICRODVD_PERSISTENT_OPENED)
- continue;
- switch (tags[i].key) {
- case 'Y':
- case 'y':
- for (sidx = 0; sidx < sizeof(MICRODVD_STYLES) - 1; sidx++)
- if (tags[i].data1 & (1 << sidx))
- av_bprintf(new_line, "{\\%c1}", MICRODVD_STYLES[sidx]);
- break;
-
- case 'c':
- av_bprintf(new_line, "{\\c&H%06X&}", tags[i].data1);
- break;
-
- case 'f':
- av_bprintf(new_line, "{\\fn%.*s}",
- tags[i].data_string_len, tags[i].data_string);
- break;
-
- case 's':
- av_bprintf(new_line, "{\\fs%d}", tags[i].data1);
- break;
-
- case 'p':
- if (tags[i].data1 == 0)
- av_bprintf(new_line, "{\\an8}");
- break;
-
- case 'o':
- av_bprintf(new_line, "{\\pos(%d,%d)}",
- tags[i].data1, tags[i].data2);
- break;
- }
- if (tags[i].persistent == MICRODVD_PERSISTENT_ON)
- tags[i].persistent = MICRODVD_PERSISTENT_OPENED;
- }
-}
-
-static void microdvd_close_no_persistent_tags(AVBPrint *new_line,
- struct microdvd_tag *tags)
-{
- int i, sidx;
-
- for (i = sizeof(MICRODVD_TAGS) - 2; i >= 0; i--) {
- if (tags[i].persistent != MICRODVD_PERSISTENT_OFF)
- continue;
- switch (tags[i].key) {
-
- case 'y':
- for (sidx = sizeof(MICRODVD_STYLES) - 2; sidx >= 0; sidx--)
- if (tags[i].data1 & (1 << sidx))
- av_bprintf(new_line, "{\\%c0}", MICRODVD_STYLES[sidx]);
- break;
-
- case 'c':
- av_bprintf(new_line, "{\\c}");
- break;
-
- case 'f':
- av_bprintf(new_line, "{\\fn}");
- break;
-
- case 's':
- av_bprintf(new_line, "{\\fs}");
- break;
- }
- tags[i].key = 0;
- }
-}
-
-static int microdvd_decode_frame(AVCodecContext *avctx,
- void *data, int *got_sub_ptr, AVPacket *avpkt)
-{
- AVSubtitle *sub = data;
- AVBPrint new_line;
- char c;
- char *decoded_sub;
- char *line = avpkt->data;
- char *end = avpkt->data + avpkt->size;
- struct microdvd_tag tags[sizeof(MICRODVD_TAGS) - 1] = {{0}};
-
- if (avpkt->size <= 0)
- return avpkt->size;
-
- /* To be removed later */
- if (sscanf(line, "{%*d}{%*[0123456789]}%c", &c) == 1 &&
- line[avpkt->size - 1] == '\n') {
- av_log(avctx, AV_LOG_ERROR, "AVPacket is not clean (contains timing "
- "information and a trailing line break). You need to upgrade "
- "your libavformat or sanitize your packet.\n");
- return AVERROR_INVALIDDATA;
- }
-
- av_bprint_init(&new_line, 0, 2048);
-
- // subtitle content
- while (line < end && *line) {
-
- // parse MicroDVD tags, and open them in ASS
- line = microdvd_load_tags(tags, line);
- microdvd_open_tags(&new_line, tags);
-
- // simple copy until EOL or forced carriage return
- while (line < end && *line && *line != '|') {
- av_bprint_chars(&new_line, *line, 1);
- line++;
- }
-
- // line split
- if (line < end && *line == '|') {
- microdvd_close_no_persistent_tags(&new_line, tags);
- av_bprintf(&new_line, "\\N");
- line++;
- }
- }
- if (new_line.len) {
- av_bprintf(&new_line, "\r\n");
-
- av_bprint_finalize(&new_line, &decoded_sub);
- if (*decoded_sub) {
- int64_t start = avpkt->pts;
- int64_t duration = avpkt->duration;
- int ts_start = av_rescale_q(start, avctx->time_base, (AVRational){1,100});
- int ts_duration = duration != -1 ?
- av_rescale_q(duration, avctx->time_base, (AVRational){1,100}) : -1;
- ff_ass_add_rect(sub, decoded_sub, ts_start, ts_duration, 0);
- }
- av_free(decoded_sub);
- }
-
- *got_sub_ptr = sub->num_rects > 0;
- return avpkt->size;
-}
-
-static int microdvd_init(AVCodecContext *avctx)
-{
- int i, sidx;
- AVBPrint font_buf;
- int font_size = ASS_DEFAULT_FONT_SIZE;
- int color = ASS_DEFAULT_COLOR;
- int bold = ASS_DEFAULT_BOLD;
- int italic = ASS_DEFAULT_ITALIC;
- int underline = ASS_DEFAULT_UNDERLINE;
- int alignment = ASS_DEFAULT_ALIGNMENT;
- struct microdvd_tag tags[sizeof(MICRODVD_TAGS) - 1] = {{0}};
-
- av_bprint_init(&font_buf, 0, AV_BPRINT_SIZE_AUTOMATIC);
- av_bprintf(&font_buf, "%s", ASS_DEFAULT_FONT);
-
- if (avctx->extradata) {
- microdvd_load_tags(tags, avctx->extradata);
- for (i = 0; i < sizeof(MICRODVD_TAGS) - 1; i++) {
- switch (av_tolower(tags[i].key)) {
- case 'y':
- for (sidx = 0; sidx < sizeof(MICRODVD_STYLES) - 1; sidx++) {
- if (tags[i].data1 & (1 << sidx)) {
- switch (MICRODVD_STYLES[sidx]) {
- case 'i': italic = 1; break;
- case 'b': bold = 1; break;
- case 'u': underline = 1; break;
- }
- }
- }
- break;
-
- case 'c': color = tags[i].data1; break;
- case 's': font_size = tags[i].data1; break;
- case 'p': alignment = 8; break;
-
- case 'f':
- av_bprint_clear(&font_buf);
- av_bprintf(&font_buf, "%.*s",
- tags[i].data_string_len, tags[i].data_string);
- break;
- }
- }
- }
- return ff_ass_subtitle_header(avctx, font_buf.str, font_size, color,
- ASS_DEFAULT_BACK_COLOR, bold, italic,
- underline, alignment);
-}
-
-AVCodec ff_microdvd_decoder = {
- .name = "microdvd",
- .long_name = NULL_IF_CONFIG_SMALL("MicroDVD subtitle"),
- .type = AVMEDIA_TYPE_SUBTITLE,
- .id = AV_CODEC_ID_MICRODVD,
- .init = microdvd_init,
- .decode = microdvd_decode_frame,
-};
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