diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/xsubdec.c')
-rw-r--r-- | contrib/ffmpeg/libavcodec/xsubdec.c | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/contrib/ffmpeg/libavcodec/xsubdec.c b/contrib/ffmpeg/libavcodec/xsubdec.c deleted file mode 100644 index 391a003ac..000000000 --- a/contrib/ffmpeg/libavcodec/xsubdec.c +++ /dev/null @@ -1,136 +0,0 @@ -/* - * XSUB subtitle decoder - * Copyright (c) 2007 Reimar Döffinger - * - * 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 - */ -#include "avcodec.h" -#include "bitstream.h" -#include "bytestream.h" - -static int decode_init(AVCodecContext *avctx) { - avctx->pix_fmt = PIX_FMT_PAL8; - return 0; -} - -static const uint8_t tc_offsets[9] = { 0, 1, 3, 4, 6, 7, 9, 10, 11 }; -static const uint8_t tc_muls[9] = { 10, 6, 10, 6, 10, 6, 10, 10, 1 }; - -static uint64_t parse_timecode(const uint8_t *buf) { - int i; - int64_t ms = 0; - if (buf[2] != ':' || buf[5] != ':' || buf[8] != '.') - return AV_NOPTS_VALUE; - for (i = 0; i < sizeof(tc_offsets); i++) { - uint8_t c = buf[tc_offsets[i]] - '0'; - if (c > 9) return AV_NOPTS_VALUE; - ms = (ms + c) * tc_muls[i]; - } - return ms; -} - -static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, - const uint8_t *buf, int buf_size) { - AVSubtitle *sub = data; - const uint8_t *buf_end = buf + buf_size; - uint8_t *bitmap; - int w, h, x, y, rlelen, i; - GetBitContext gb; - - // check that at least header fits - if (buf_size < 27 + 7 * 2 + 4 * 3) { - av_log(avctx, AV_LOG_ERROR, "coded frame too small\n"); - return -1; - } - - // read start and end time - if (buf[0] != '[' || buf[13] != '-' || buf[26] != ']') { - av_log(avctx, AV_LOG_ERROR, "invalid time code\n"); - return -1; - } - sub->start_display_time = parse_timecode(buf + 1); - sub->end_display_time = parse_timecode(buf + 14); - buf += 27; - - // read header - w = bytestream_get_le16(&buf); - h = bytestream_get_le16(&buf); - if (avcodec_check_dimensions(avctx, w, h) < 0) - return -1; - x = bytestream_get_le16(&buf); - y = bytestream_get_le16(&buf); - // skip bottom right position, it gives no new information - bytestream_get_le16(&buf); - bytestream_get_le16(&buf); - rlelen = bytestream_get_le16(&buf); - - // allocate sub and set values - if (!sub->rects) { - sub->rects = av_mallocz(sizeof(AVSubtitleRect)); - sub->num_rects = 1; - } - av_freep(&sub->rects[0].bitmap); - sub->rects[0].x = x; sub->rects[0].y = y; - sub->rects[0].w = w; sub->rects[0].h = h; - sub->rects[0].linesize = w; - sub->rects[0].bitmap = av_malloc(w * h); - sub->rects[0].nb_colors = 4; - sub->rects[0].rgba_palette = av_malloc(sub->rects[0].nb_colors * 4); - - // read palette - for (i = 0; i < sub->rects[0].nb_colors; i++) - sub->rects[0].rgba_palette[i] = bytestream_get_be24(&buf); - // make all except background (first entry) non-transparent - for (i = 1; i < sub->rects[0].nb_colors; i++) - sub->rects[0].rgba_palette[i] |= 0xff000000; - - // process RLE-compressed data - rlelen = FFMIN(rlelen, buf_end - buf); - init_get_bits(&gb, buf, rlelen * 8); - bitmap = sub->rects[0].bitmap; - for (y = 0; y < h; y++) { - // interlaced: do odd lines - if (y == (h + 1) / 2) bitmap = sub->rects[0].bitmap + w; - for (x = 0; x < w; ) { - int log2 = ff_log2_tab[show_bits(&gb, 8)]; - int run = get_bits(&gb, 14 - 4 * (log2 >> 1)); - int color = get_bits(&gb, 2); - run = FFMIN(run, w - x); - // run length 0 means till end of row - if (!run) run = w - x; - memset(bitmap, color, run); - bitmap += run; - x += run; - } - // interlaced, skip every second line - bitmap += w; - align_get_bits(&gb); - } - *data_size = 1; - return buf_size; -} - -AVCodec xsub_decoder = { - "xsub", - CODEC_TYPE_SUBTITLE, - CODEC_ID_XSUB, - 0, - decode_init, - NULL, - NULL, - decode_frame, -}; |