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Diffstat (limited to 'ffmpeg/libavcodec/xsubenc.c')
-rw-r--r--ffmpeg/libavcodec/xsubenc.c221
1 files changed, 0 insertions, 221 deletions
diff --git a/ffmpeg/libavcodec/xsubenc.c b/ffmpeg/libavcodec/xsubenc.c
deleted file mode 100644
index 53f4d6c..0000000
--- a/ffmpeg/libavcodec/xsubenc.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/*
- * DivX (XSUB) subtitle encoder
- * Copyright (c) 2005 DivX, Inc.
- * Copyright (c) 2009 Bjorn Axelsson
- *
- * 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 "bytestream.h"
-#include "put_bits.h"
-
-/**
- * Number of pixels to pad left and right.
- *
- * The official encoder pads the subtitles with two pixels on either side,
- * but until we find out why, we won't do it (we will pad to have width
- * divisible by 2 though).
- */
-#define PADDING 0
-#define PADDING_COLOR 0
-
-/**
- * Encode a single color run. At most 16 bits will be used.
- * @param len length of the run, values > 255 mean "until end of line", may not be < 0.
- * @param color color to encode, only the lowest two bits are used and all others must be 0.
- */
-static void put_xsub_rle(PutBitContext *pb, int len, int color)
-{
- if (len <= 255)
- put_bits(pb, 2 + ((ff_log2_tab[len] >> 1) << 2), len);
- else
- put_bits(pb, 14, 0);
- put_bits(pb, 2, color);
-}
-
-/**
- * Encode a 4-color bitmap with XSUB rle.
- *
- * The encoded bitmap may be wider than the source bitmap due to padding.
- */
-static int xsub_encode_rle(PutBitContext *pb, const uint8_t *bitmap,
- int linesize, int w, int h)
-{
- int x0, x1, y, len, color = PADDING_COLOR;
-
- for (y = 0; y < h; y++) {
- x0 = 0;
- while (x0 < w) {
- // Make sure we have enough room for at least one run and padding
- if (pb->size_in_bits - put_bits_count(pb) < 7*8)
- return -1;
-
- x1 = x0;
- color = bitmap[x1++] & 3;
- while (x1 < w && (bitmap[x1] & 3) == color)
- x1++;
- len = x1 - x0;
- if (PADDING && x0 == 0) {
- if (color == PADDING_COLOR) {
- len += PADDING;
- x0 -= PADDING;
- } else
- put_xsub_rle(pb, PADDING, PADDING_COLOR);
- }
-
- // Run can't be longer than 255, unless it is the rest of a row
- if (x1 == w && color == PADDING_COLOR) {
- len += PADDING + (w&1);
- } else
- len = FFMIN(len, 255);
- put_xsub_rle(pb, len, color);
-
- x0 += len;
- }
- if (color != PADDING_COLOR && (PADDING + (w&1)))
- put_xsub_rle(pb, PADDING + (w&1), PADDING_COLOR);
-
- avpriv_align_put_bits(pb);
-
- bitmap += linesize;
- }
-
- return 0;
-}
-
-static int make_tc(uint64_t ms, int *tc)
-{
- static const int tc_divs[3] = { 1000, 60, 60 };
- int i;
- for (i=0; i<3; i++) {
- tc[i] = ms % tc_divs[i];
- ms /= tc_divs[i];
- }
- tc[3] = ms;
- return ms > 99;
-}
-
-static int xsub_encode(AVCodecContext *avctx, unsigned char *buf,
- int bufsize, const AVSubtitle *h)
-{
- uint64_t startTime = h->pts / 1000; // FIXME: need better solution...
- uint64_t endTime = startTime + h->end_display_time - h->start_display_time;
- int start_tc[4], end_tc[4];
- uint8_t *hdr = buf + 27; // Point behind the timestamp
- uint8_t *rlelenptr;
- uint16_t width, height;
- int i;
- PutBitContext pb;
-
- if (bufsize < 27 + 7*2 + 4*3) {
- av_log(avctx, AV_LOG_ERROR, "Buffer too small for XSUB header.\n");
- return -1;
- }
-
- // TODO: support multiple rects
- if (h->num_rects != 1)
- av_log(avctx, AV_LOG_WARNING, "Only single rects supported (%d in subtitle.)\n", h->num_rects);
-
- // TODO: render text-based subtitles into bitmaps
- if (!h->rects[0]->pict.data[0] || !h->rects[0]->pict.data[1]) {
- av_log(avctx, AV_LOG_WARNING, "No subtitle bitmap available.\n");
- return -1;
- }
-
- // TODO: color reduction, similar to dvdsub encoder
- if (h->rects[0]->nb_colors > 4)
- av_log(avctx, AV_LOG_WARNING, "No more than 4 subtitle colors supported (%d found.)\n", h->rects[0]->nb_colors);
-
- // TODO: Palette swapping if color zero is not transparent
- if (((uint32_t *)h->rects[0]->pict.data[1])[0] & 0xff)
- av_log(avctx, AV_LOG_WARNING, "Color index 0 is not transparent. Transparency will be messed up.\n");
-
- if (make_tc(startTime, start_tc) || make_tc(endTime, end_tc)) {
- av_log(avctx, AV_LOG_WARNING, "Time code >= 100 hours.\n");
- return -1;
- }
-
- snprintf(buf, 28,
- "[%02d:%02d:%02d.%03d-%02d:%02d:%02d.%03d]",
- start_tc[3], start_tc[2], start_tc[1], start_tc[0],
- end_tc[3], end_tc[2], end_tc[1], end_tc[0]);
-
- // Width and height must probably be multiples of 2.
- // 2 pixels required on either side of subtitle.
- // Possibly due to limitations of hardware renderers.
- // TODO: check if the bitmap is already padded
- width = FFALIGN(h->rects[0]->w, 2) + PADDING * 2;
- height = FFALIGN(h->rects[0]->h, 2);
-
- bytestream_put_le16(&hdr, width);
- bytestream_put_le16(&hdr, height);
- bytestream_put_le16(&hdr, h->rects[0]->x);
- bytestream_put_le16(&hdr, h->rects[0]->y);
- bytestream_put_le16(&hdr, h->rects[0]->x + width -1);
- bytestream_put_le16(&hdr, h->rects[0]->y + height -1);
-
- rlelenptr = hdr; // Will store length of first field here later.
- hdr+=2;
-
- // Palette
- for (i=0; i<4; i++)
- bytestream_put_be24(&hdr, ((uint32_t *)h->rects[0]->pict.data[1])[i]);
-
- // Bitmap
- // RLE buffer. Reserve 2 bytes for possible padding after the last row.
- init_put_bits(&pb, hdr, bufsize - (hdr - buf) - 2);
- if (xsub_encode_rle(&pb, h->rects[0]->pict.data[0],
- h->rects[0]->pict.linesize[0]*2,
- h->rects[0]->w, (h->rects[0]->h + 1) >> 1))
- return -1;
- bytestream_put_le16(&rlelenptr, put_bits_count(&pb) >> 3); // Length of first field
-
- if (xsub_encode_rle(&pb, h->rects[0]->pict.data[0] + h->rects[0]->pict.linesize[0],
- h->rects[0]->pict.linesize[0]*2,
- h->rects[0]->w, h->rects[0]->h >> 1))
- return -1;
-
- // Enforce total height to be a multiple of 2
- if (h->rects[0]->h & 1) {
- put_xsub_rle(&pb, h->rects[0]->w, PADDING_COLOR);
- avpriv_align_put_bits(&pb);
- }
-
- flush_put_bits(&pb);
-
- return hdr - buf + put_bits_count(&pb)/8;
-}
-
-static av_cold int xsub_encoder_init(AVCodecContext *avctx)
-{
- if (!avctx->codec_tag)
- avctx->codec_tag = MKTAG('D','X','S','B');
-
- avctx->bits_per_coded_sample = 4;
-
- return 0;
-}
-
-AVCodec ff_xsub_encoder = {
- .name = "xsub",
- .long_name = NULL_IF_CONFIG_SMALL("DivX subtitles (XSUB)"),
- .type = AVMEDIA_TYPE_SUBTITLE,
- .id = AV_CODEC_ID_XSUB,
- .init = xsub_encoder_init,
- .encode_sub = xsub_encode,
-};
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