/*
- * DVB subtitle encoding for ffmpeg
- * Copyright (c) 2005 Fabrice Bellard.
+ * DVB subtitle encoding
+ * Copyright (c) 2005 Fabrice Bellard
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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;
int x, y, len, x1, v, color;
q = *pq;
-
+
for(y = 0; y < h; y++) {
*q++ = 0x10;
bitbuf = 0;
bitcnt = 6;
-
+
x = 0;
while (x < w) {
x1 = x;
int x, y, len, x1, v, color;
q = *pq;
-
+
for(y = 0; y < h; y++) {
*q++ = 0x11;
bitbuf = 0;
bitcnt = 4;
-
+
x = 0;
while (x < w) {
x1 = x;
*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)
+static int encode_dvb_subtitles(DVBSubtitleContext *s,
+ 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;
q = outbuf;
page_id = 1;
- region_id = 0;
- clut_id = 0;
- object_id = 0;
- if (h->nb_colors <= 4) {
- /* 2 bpp, some decoders do not support it correctly */
- bpp_index = 0;
- } else if (h->nb_colors <= 16) {
- /* 4 bpp, standard encoding */
- bpp_index = 1;
- } else {
+
+ 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++ = region_id;
- *q++ = 0xff; /* reserved */
- putbe16(&q, 0); /* left pos */
- putbe16(&q, 0); /* top pos */
+ *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 */
+ 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) {
- /* CLUT segment */
-
- *q++ = 0x0f; /* sync byte */
- *q++ = 0x12; /* CLUT definition segment */
- putbe16(&q, page_id);
+ for (clut_id = 0; clut_id < h->num_rects; clut_id++) {
+
+ /* CLUT segment */
+
+ 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) {
+ /* 4 bpp, standard encoding */
+ bpp_index = 1;
+ } else {
+ return -1;
+ }
+
+ *q++ = 0x0f; /* sync byte */
+ *q++ = 0x12; /* CLUT definition segment */
+ 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++) {
+ *q++ = i; /* clut_entry_id */
+ *q++ = (1 << (7 - bpp_index)) | (0xf << 1) | 1; /* 2 bits/pixel full range */
+ {
+ int a, r, g, b;
+ 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);
+ *q++ = RGB_TO_U_CCIR(r, g, b, 0);
+ *q++ = 255 - a;
+ }
+ }
+
+ bytestream_put_be16(&pseg_len, q - pseg_len - 2);
+ }
+ }
+
+ for (region_id = 0; region_id < h->num_rects; region_id++) {
+
+ /* region composition segment */
+
+ 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) {
+ /* 4 bpp, standard encoding */
+ bpp_index = 1;
+ } else {
+ return -1;
+ }
+
+ *q++ = 0x0f; /* sync_byte */
+ *q++ = 0x11; /* segment_type */
+ 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->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->rgba_palette[i] >> 24) & 0xff;
- r = (h->rgba_palette[i] >> 16) & 0xff;
- g = (h->rgba_palette[i] >> 8) & 0xff;
- b = (h->rgba_palette[i] >> 0) & 0xff;
-
- *q++ = RGB_TO_Y_CCIR(r, g, b);
- *q++ = RGB_TO_V_CCIR(r, g, b, 0);
- *q++ = RGB_TO_U_CCIR(r, g, b, 0);
- *q++ = 255 - a;
- }
+ *q++ = region_id;
+ *q++ = (s->object_version << 4) | (0 << 3) | 0x07; /* version , no fill */
+ 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) {
+ 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);
}
- /* region composition segment */
- *q++ = 0x0f; /* sync_byte */
- *q++ = 0x11; /* segment_type */
- putbe16(&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, 720); /* region width */
- putbe16(&q, 576); /* region height */
- *q++ = ((1 + bpp_index) << 5) | ((1 + bpp_index) << 2) | 0x03;
- *q++ = clut_id;
- *q++ = 0; /* 8 bit fill colors */
- *q++ = 0x03; /* 4 bit and 2 bit fill colors */
-
if (!s->hide_state) {
- putbe16(&q, object_id);
- *q++ = (0 << 6) | (0 << 4) | ((h->x >> 8) & 0xf);
- *q++ = h->x;
- *q++ = 0xf0 | ((h->y >> 8) & 0xf);
- *q++ = h->y;
- }
-
- putbe16(&pseg_len, q - pseg_len - 2);
- if (!s->hide_state) {
-
- /* Object Data segment */
+ for (object_id = 0; object_id < h->num_rects; object_id++) {
+ /* Object Data segment */
- *q++ = 0x0f; /* sync byte */
- *q++ = 0x13;
- putbe16(&q, page_id);
- pseg_len = q;
- q += 2; /* segment length */
-
- putbe16(&q, object_id);
- *q++ = (s->object_version << 4) | (0 << 2) | (0 << 1) | 1; /* version = 0,
- onject_coding_method,
- non_modifying_color_flag */
- {
- uint8_t *ptop_field_len, *pbottom_field_len, *top_ptr, *bottom_ptr;
- void (*dvb_encode_rle)(uint8_t **pq,
- const uint8_t *bitmap, int linesize,
- int w, int h);
- ptop_field_len = q;
- q += 2;
- pbottom_field_len = q;
- q += 2;
-
- if (bpp_index == 0)
- dvb_encode_rle = dvb_encode_rle2;
- else
- dvb_encode_rle = dvb_encode_rle4;
-
- top_ptr = q;
- dvb_encode_rle(&q, h->bitmap, h->w * 2, h->w, h->h >> 1);
- bottom_ptr = q;
- dvb_encode_rle(&q, h->bitmap + h->w, h->w * 2, h->w, h->h >> 1);
-
- putbe16(&ptop_field_len, bottom_ptr - top_ptr);
- putbe16(&pbottom_field_len, q - bottom_ptr);
- }
+ 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) {
+ /* 4 bpp, standard encoding */
+ bpp_index = 1;
+ } else {
+ return -1;
+ }
+
+ *q++ = 0x0f; /* sync byte */
+ *q++ = 0x13;
+ bytestream_put_be16(&q, page_id);
+ pseg_len = q;
+ q += 2; /* segment length */
+
+ 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 */
+ {
+ uint8_t *ptop_field_len, *pbottom_field_len, *top_ptr, *bottom_ptr;
+ void (*dvb_encode_rle)(uint8_t **pq,
+ const uint8_t *bitmap, int linesize,
+ int w, int h);
+ ptop_field_len = q;
+ q += 2;
+ pbottom_field_len = q;
+ q += 2;
+
+ if (bpp_index == 0)
+ dvb_encode_rle = dvb_encode_rle2;
+ else
+ dvb_encode_rle = dvb_encode_rle4;
+
+ top_ptr = q;
+ 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]->data[0] + h->rects[object_id]->w,
+ h->rects[object_id]->w * 2, h->rects[object_id]->w,
+ h->rects[object_id]->h >> 1);
+
+ 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);
+ }
}
/* end of display set segment */
*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