diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/dvdsubenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/dvdsubenc.c | 247 |
1 files changed, 0 insertions, 247 deletions
diff --git a/contrib/ffmpeg/libavcodec/dvdsubenc.c b/contrib/ffmpeg/libavcodec/dvdsubenc.c deleted file mode 100644 index fac29acc2..000000000 --- a/contrib/ffmpeg/libavcodec/dvdsubenc.c +++ /dev/null @@ -1,247 +0,0 @@ -/* - * DVD subtitle encoding for ffmpeg - * Copyright (c) 2005 Wolfram Gloger. - * - * 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" - -#undef NDEBUG -#include <assert.h> - -// ncnt is the nibble counter -#define PUTNIBBLE(val)\ -do {\ - if (ncnt++ & 1)\ - *q++ = bitbuf | ((val) & 0x0f);\ - else\ - bitbuf = (val) << 4;\ -} while(0) - -static void dvd_encode_rle(uint8_t **pq, - const uint8_t *bitmap, int linesize, - int w, int h, - const int cmap[256]) -{ - uint8_t *q; - unsigned int bitbuf = 0; - int ncnt; - int x, y, len, color; - - q = *pq; - - for (y = 0; y < h; ++y) { - ncnt = 0; - for(x = 0; x < w; x += len) { - color = bitmap[x]; - for (len=1; x+len < w; ++len) - if (bitmap[x+len] != color) - break; - color = cmap[color]; - assert(color < 4); - if (len < 0x04) { - PUTNIBBLE((len << 2)|color); - } else if (len < 0x10) { - PUTNIBBLE(len >> 2); - PUTNIBBLE((len << 2)|color); - } else if (len < 0x40) { - PUTNIBBLE(0); - PUTNIBBLE(len >> 2); - PUTNIBBLE((len << 2)|color); - } else if (x+len == w) { - PUTNIBBLE(0); - PUTNIBBLE(0); - PUTNIBBLE(0); - PUTNIBBLE(color); - } else { - if (len > 0xff) - len = 0xff; - PUTNIBBLE(0); - PUTNIBBLE(len >> 6); - PUTNIBBLE(len >> 2); - PUTNIBBLE((len << 2)|color); - } - } - /* end of line */ - if (ncnt & 1) - PUTNIBBLE(0); - bitmap += linesize; - } - - *pq = q; -} - -static inline void putbe16(uint8_t **pq, uint16_t v) -{ - uint8_t *q = *pq; - *q++ = v >> 8; - *q++ = v; - *pq = q; -} - -static int encode_dvd_subtitles(uint8_t *outbuf, int outbuf_size, - const AVSubtitle *h) -{ - uint8_t *q, *qq; - int object_id; - int offset1[20], offset2[20]; - int i, imax, color, alpha, rects = h->num_rects; - unsigned long hmax; - unsigned long hist[256]; - int cmap[256]; - - if (rects == 0 || h->rects == NULL) - return -1; - if (rects > 20) - rects = 20; - - // analyze bitmaps, compress to 4 colors - for (i=0; i<256; ++i) { - hist[i] = 0; - cmap[i] = 0; - } - for (object_id = 0; object_id < rects; object_id++) - for (i=0; i<h->rects[object_id].w*h->rects[object_id].h; ++i) { - color = h->rects[object_id].bitmap[i]; - // only count non-transparent pixels - alpha = h->rects[object_id].rgba_palette[color] >> 24; - hist[color] += alpha; - } - for (color=3;; --color) { - hmax = 0; - imax = 0; - for (i=0; i<256; ++i) - if (hist[i] > hmax) { - imax = i; - hmax = hist[i]; - } - if (hmax == 0) - break; - if (color == 0) - color = 3; - av_log(NULL, AV_LOG_DEBUG, "dvd_subtitle hist[%d]=%ld -> col %d\n", - imax, hist[imax], color); - cmap[imax] = color; - hist[imax] = 0; - } - - - // encode data block - q = outbuf + 4; - for (object_id = 0; object_id < rects; object_id++) { - offset1[object_id] = q - outbuf; - // worst case memory requirement: 1 nibble per pixel.. - if ((q - outbuf) + h->rects[object_id].w*h->rects[object_id].h/2 - + 17*rects + 21 > outbuf_size) { - av_log(NULL, AV_LOG_ERROR, "dvd_subtitle too big\n"); - return -1; - } - dvd_encode_rle(&q, h->rects[object_id].bitmap, - h->rects[object_id].w*2, - h->rects[object_id].w, h->rects[object_id].h >> 1, - cmap); - offset2[object_id] = q - outbuf; - dvd_encode_rle(&q, h->rects[object_id].bitmap + h->rects[object_id].w, - h->rects[object_id].w*2, - h->rects[object_id].w, h->rects[object_id].h >> 1, - cmap); - } - - // set data packet size - qq = outbuf + 2; - putbe16(&qq, q - outbuf); - - // send start display command - putbe16(&q, (h->start_display_time*90) >> 10); - putbe16(&q, (q - outbuf) /*- 2 */ + 8 + 12*rects + 2); - *q++ = 0x03; // palette - 4 nibbles - *q++ = 0x03; *q++ = 0x7f; - *q++ = 0x04; // alpha - 4 nibbles - *q++ = 0xf0; *q++ = 0x00; - //*q++ = 0x0f; *q++ = 0xff; - - // XXX not sure if more than one rect can really be encoded.. - // 12 bytes per rect - for (object_id = 0; object_id < rects; object_id++) { - int x2 = h->rects[object_id].x + h->rects[object_id].w - 1; - int y2 = h->rects[object_id].y + h->rects[object_id].h - 1; - - *q++ = 0x05; - // x1 x2 -> 6 nibbles - *q++ = h->rects[object_id].x >> 4; - *q++ = (h->rects[object_id].x << 4) | ((x2 >> 8) & 0xf); - *q++ = x2; - // y1 y2 -> 6 nibbles - *q++ = h->rects[object_id].y >> 4; - *q++ = (h->rects[object_id].y << 4) | ((y2 >> 8) & 0xf); - *q++ = y2; - - *q++ = 0x06; - // offset1, offset2 - putbe16(&q, offset1[object_id]); - putbe16(&q, offset2[object_id]); - } - *q++ = 0x01; // start command - *q++ = 0xff; // terminating command - - // send stop display command last - putbe16(&q, (h->end_display_time*90) >> 10); - putbe16(&q, (q - outbuf) - 2 /*+ 4*/); - *q++ = 0x02; // set end - *q++ = 0xff; // terminating command - - qq = outbuf; - putbe16(&qq, q - outbuf); - - av_log(NULL, AV_LOG_DEBUG, "subtitle_packet size=%td\n", q - outbuf); - return q - outbuf; -} - -static int dvdsub_init_encoder(AVCodecContext *avctx) -{ - return 0; -} - -static int dvdsub_close_encoder(AVCodecContext *avctx) -{ - return 0; -} - -static int dvdsub_encode(AVCodecContext *avctx, - unsigned char *buf, int buf_size, void *data) -{ - //DVDSubtitleContext *s = avctx->priv_data; - AVSubtitle *sub = data; - int ret; - - ret = encode_dvd_subtitles(buf, buf_size, sub); - return ret; -} - -AVCodec dvdsub_encoder = { - "dvdsub", - CODEC_TYPE_SUBTITLE, - CODEC_ID_DVD_SUBTITLE, - 0, - dvdsub_init_encoder, - dvdsub_encode, - dvdsub_close_encoder, -}; - -/* Local Variables: */ -/* c-basic-offset:4 */ -/* End: */ |