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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <libavcodec/avcodec.h>
#include "mp_msg.h"
#include "libmpdemux/stheader.h"
#include "sub.h"
#include "spudec.h"
#include "av_sub.h"
void reset_avsub(struct sh_sub *sh)
{
if (sh->context) {
avcodec_close(sh->context);
av_freep(&sh->context);
}
}
/**
* Decode a subtitle packet via libavcodec.
* \return < 0 on error, > 0 if further processing is needed
*/
int decode_avsub(struct sh_sub *sh, uint8_t *data, int size,
double pts, double duration)
{
AVCodecContext *ctx = sh->context;
enum CodecID cid = CODEC_ID_NONE;
int res;
int got_sub;
AVSubtitle sub;
AVPacket pkt;
switch (sh->type) {
case 'b':
cid = CODEC_ID_DVB_SUBTITLE; break;
case 'p':
cid = CODEC_ID_HDMV_PGS_SUBTITLE; break;
case 'x':
cid = CODEC_ID_XSUB; break;
}
av_init_packet(&pkt);
pkt.data = data;
pkt.size = size;
pkt.pts = pts * 1000;
if (duration >= 0)
pkt.convergence_duration = duration * 1000;
if (!ctx) {
AVCodec *sub_codec;
sub_codec = avcodec_find_decoder(cid);
if (!sub_codec)
goto error;
ctx = avcodec_alloc_context3(sub_codec);
if (!ctx)
goto error;
if (avcodec_open2(ctx, sub_codec, NULL) < 0) {
error:
mp_msg(MSGT_SUBREADER, MSGL_FATAL,
"Could not open subtitle decoder\n");
av_freep(&ctx);
return -1;
}
sh->context = ctx;
}
res = avcodec_decode_subtitle2(ctx, &sub, &got_sub, &pkt);
if (res < 0)
return res;
if (pts != MP_NOPTS_VALUE) {
if (sub.end_display_time > sub.start_display_time)
duration = (sub.end_display_time - sub.start_display_time) / 1000.0;
pts += sub.start_display_time / 1000.0;
}
double endpts = MP_NOPTS_VALUE;
if (pts != MP_NOPTS_VALUE && duration >= 0)
endpts = pts + duration;
if (got_sub && vo_spudec && sub.num_rects == 0)
spudec_set_paletted(vo_spudec, NULL, 0, NULL, 0, 0, 0, 0, pts, endpts);
if (got_sub && sub.num_rects > 0) {
switch (sub.rects[0]->type) {
case SUBTITLE_BITMAP:
if (!vo_spudec)
vo_spudec = spudec_new_scaled(NULL, ctx->width, ctx->height, NULL, 0);
spudec_set_paletted(vo_spudec,
sub.rects[0]->pict.data[0],
sub.rects[0]->pict.linesize[0],
sub.rects[0]->pict.data[1],
sub.rects[0]->x,
sub.rects[0]->y,
sub.rects[0]->w,
sub.rects[0]->h,
pts,
endpts);
vo_osd_changed(OSDTYPE_SPU);
break;
default:
mp_msg(MSGT_SUBREADER, MSGL_ERR, "sd_avsub: unsupported subtitle "
"type from libavcodec\n");
res = -1;
break;
}
}
if (got_sub)
avsubtitle_free(&sub);
return res;
}
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