/*
- * DVB subtitle encoding for ffmpeg
- * Copyright (c) 2005 Fabrice Bellard.
+ * DVB subtitle encoding
+ * Copyright (c) 2005 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; 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 "libavutil/colorspace.h"
typedef struct DVBSubtitleContext {
int hide_state;
*pq = q;
}
-#define SCALEBITS 10
-#define ONE_HALF (1 << (SCALEBITS - 1))
-#define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
-
-#define RGB_TO_Y_CCIR(r, g, b) \
-((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \
- FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
-
-#define RGB_TO_U_CCIR(r1, g1, b1, shift)\
-(((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 + \
- FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
-
-#define RGB_TO_V_CCIR(r1, g1, b1, shift)\
-(((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 - \
- FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
-
-static inline void putbe16(uint8_t **pq, uint16_t v)
-{
- uint8_t *q;
- q = *pq;
- *q++ = v >> 8;
- *q++ = v;
- *pq = q;
-}
-
static int encode_dvb_subtitles(DVBSubtitleContext *s,
- uint8_t *outbuf, AVSubtitle *h)
+ uint8_t *outbuf, const AVSubtitle *h)
{
uint8_t *q, *pseg_len;
int page_id, region_id, clut_id, object_id, i, bpp_index, page_state;
page_id = 1;
- if (h->num_rects == 0 || h->rects == NULL)
+ if (h->num_rects == 0 || !h->rects)
return -1;
*q++ = 0x00; /* subtitle_stream_id */
*q++ = 0x0f; /* sync_byte */
*q++ = 0x10; /* segment_type */
- putbe16(&q, page_id);
+ bytestream_put_be16(&q, page_id);
pseg_len = q;
q += 2; /* segment length */
*q++ = 30; /* page_timeout (seconds) */
else
page_state = 2; /* mode change */
/* page_version = 0 + page_state */
- *q++ = s->object_version | (page_state << 2) | 3;
+ *q++ = (s->object_version << 4) | (page_state << 2) | 3;
for (region_id = 0; region_id < h->num_rects; region_id++) {
*q++ = region_id;
*q++ = 0xff; /* reserved */
- putbe16(&q, h->rects[region_id].x); /* left pos */
- putbe16(&q, h->rects[region_id].y); /* top pos */
+ bytestream_put_be16(&q, h->rects[region_id]->x); /* left pos */
+ bytestream_put_be16(&q, h->rects[region_id]->y); /* top pos */
}
- putbe16(&pseg_len, q - pseg_len - 2);
+ bytestream_put_be16(&pseg_len, q - pseg_len - 2);
if (!s->hide_state) {
for (clut_id = 0; clut_id < h->num_rects; clut_id++) {
/* CLUT segment */
- if (h->rects[clut_id].nb_colors <= 4) {
+ if (h->rects[clut_id]->nb_colors <= 4) {
/* 2 bpp, some decoders do not support it correctly */
bpp_index = 0;
- } else if (h->rects[clut_id].nb_colors <= 16) {
+ } else if (h->rects[clut_id]->nb_colors <= 16) {
/* 4 bpp, standard encoding */
bpp_index = 1;
} else {
*q++ = 0x0f; /* sync byte */
*q++ = 0x12; /* CLUT definition segment */
- putbe16(&q, page_id);
+ bytestream_put_be16(&q, page_id);
pseg_len = q;
q += 2; /* segment length */
*q++ = clut_id;
*q++ = (0 << 4) | 0xf; /* version = 0 */
- for(i = 0; i < h->rects[clut_id].nb_colors; i++) {
+ for(i = 0; i < h->rects[clut_id]->nb_colors; i++) {
*q++ = i; /* clut_entry_id */
*q++ = (1 << (7 - bpp_index)) | (0xf << 1) | 1; /* 2 bits/pixel full range */
{
int a, r, g, b;
- a = (h->rects[clut_id].rgba_palette[i] >> 24) & 0xff;
- r = (h->rects[clut_id].rgba_palette[i] >> 16) & 0xff;
- g = (h->rects[clut_id].rgba_palette[i] >> 8) & 0xff;
- b = (h->rects[clut_id].rgba_palette[i] >> 0) & 0xff;
+ uint32_t x= ((uint32_t*)h->rects[clut_id]->data[1])[i];
+ a = (x >> 24) & 0xff;
+ r = (x >> 16) & 0xff;
+ g = (x >> 8) & 0xff;
+ b = (x >> 0) & 0xff;
*q++ = RGB_TO_Y_CCIR(r, g, b);
*q++ = RGB_TO_V_CCIR(r, g, b, 0);
}
}
- putbe16(&pseg_len, q - pseg_len - 2);
+ bytestream_put_be16(&pseg_len, q - pseg_len - 2);
}
}
/* region composition segment */
- if (h->rects[region_id].nb_colors <= 4) {
+ if (h->rects[region_id]->nb_colors <= 4) {
/* 2 bpp, some decoders do not support it correctly */
bpp_index = 0;
- } else if (h->rects[region_id].nb_colors <= 16) {
+ } else if (h->rects[region_id]->nb_colors <= 16) {
/* 4 bpp, standard encoding */
bpp_index = 1;
} else {
*q++ = 0x0f; /* sync_byte */
*q++ = 0x11; /* segment_type */
- putbe16(&q, page_id);
+ bytestream_put_be16(&q, page_id);
pseg_len = q;
q += 2; /* segment length */
*q++ = region_id;
*q++ = (s->object_version << 4) | (0 << 3) | 0x07; /* version , no fill */
- putbe16(&q, h->rects[region_id].w); /* region width */
- putbe16(&q, h->rects[region_id].h); /* region height */
+ bytestream_put_be16(&q, h->rects[region_id]->w); /* region width */
+ bytestream_put_be16(&q, h->rects[region_id]->h); /* region height */
*q++ = ((1 + bpp_index) << 5) | ((1 + bpp_index) << 2) | 0x03;
*q++ = region_id; /* clut_id == region_id */
*q++ = 0; /* 8 bit fill colors */
*q++ = 0x03; /* 4 bit and 2 bit fill colors */
if (!s->hide_state) {
- putbe16(&q, region_id); /* object_id == region_id */
+ bytestream_put_be16(&q, region_id); /* object_id == region_id */
*q++ = (0 << 6) | (0 << 4);
*q++ = 0;
*q++ = 0xf0;
*q++ = 0;
}
- putbe16(&pseg_len, q - pseg_len - 2);
+ bytestream_put_be16(&pseg_len, q - pseg_len - 2);
}
if (!s->hide_state) {
for (object_id = 0; object_id < h->num_rects; object_id++) {
/* Object Data segment */
- if (h->rects[object_id].nb_colors <= 4) {
+ if (h->rects[object_id]->nb_colors <= 4) {
/* 2 bpp, some decoders do not support it correctly */
bpp_index = 0;
- } else if (h->rects[object_id].nb_colors <= 16) {
+ } else if (h->rects[object_id]->nb_colors <= 16) {
/* 4 bpp, standard encoding */
bpp_index = 1;
} else {
*q++ = 0x0f; /* sync byte */
*q++ = 0x13;
- putbe16(&q, page_id);
+ bytestream_put_be16(&q, page_id);
pseg_len = q;
q += 2; /* segment length */
- putbe16(&q, object_id);
+ bytestream_put_be16(&q, object_id);
*q++ = (s->object_version << 4) | (0 << 2) | (0 << 1) | 1; /* version = 0,
onject_coding_method,
non_modifying_color_flag */
dvb_encode_rle = dvb_encode_rle4;
top_ptr = q;
- dvb_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);
+ dvb_encode_rle(&q, h->rects[object_id]->data[0], h->rects[object_id]->w * 2,
+ h->rects[object_id]->w, h->rects[object_id]->h >> 1);
bottom_ptr = q;
- dvb_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);
+ dvb_encode_rle(&q, h->rects[object_id]->data[0] + h->rects[object_id]->w,
+ h->rects[object_id]->w * 2, h->rects[object_id]->w,
+ h->rects[object_id]->h >> 1);
- putbe16(&ptop_field_len, bottom_ptr - top_ptr);
- putbe16(&pbottom_field_len, q - bottom_ptr);
+ bytestream_put_be16(&ptop_field_len, bottom_ptr - top_ptr);
+ bytestream_put_be16(&pbottom_field_len, q - bottom_ptr);
}
- putbe16(&pseg_len, q - pseg_len - 2);
+ bytestream_put_be16(&pseg_len, q - pseg_len - 2);
}
}
*q++ = 0x0f; /* sync_byte */
*q++ = 0x80; /* segment_type */
- putbe16(&q, page_id);
+ bytestream_put_be16(&q, page_id);
pseg_len = q;
q += 2; /* segment length */
- putbe16(&pseg_len, q - pseg_len - 2);
+ bytestream_put_be16(&pseg_len, q - pseg_len - 2);
*q++ = 0xff; /* end of PES data */
return q - outbuf;
}
-static int dvbsub_init_decoder(AVCodecContext *avctx)
-{
- return 0;
-}
-
-static int dvbsub_close_decoder(AVCodecContext *avctx)
-{
- return 0;
-}
-
static int dvbsub_encode(AVCodecContext *avctx,
- unsigned char *buf, int buf_size, void *data)
+ unsigned char *buf, int buf_size,
+ const AVSubtitle *sub)
{
DVBSubtitleContext *s = avctx->priv_data;
- AVSubtitle *sub = data;
int ret;
ret = encode_dvb_subtitles(s, buf, sub);
return ret;
}
-AVCodec dvbsub_encoder = {
- "dvbsub",
- CODEC_TYPE_SUBTITLE,
- CODEC_ID_DVB_SUBTITLE,
- sizeof(DVBSubtitleContext),
- dvbsub_init_decoder,
- dvbsub_encode,
- dvbsub_close_decoder,
+AVCodec ff_dvbsub_encoder = {
+ .name = "dvbsub",
+ .long_name = NULL_IF_CONFIG_SMALL("DVB subtitles"),
+ .type = AVMEDIA_TYPE_SUBTITLE,
+ .id = AV_CODEC_ID_DVB_SUBTITLE,
+ .priv_data_size = sizeof(DVBSubtitleContext),
+ .encode_sub = dvbsub_encode,
};
projects / ffmpeg / blobdiff