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mpv/sub/sd_lavc.c

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/*
* This file is part of mplayer2.
*
* mplayer2 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.
*
* mplayer2 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 mplayer2. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <libavcodec/avcodec.h>
#include "talloc.h"
#include "mp_msg.h"
#include "libmpdemux/stheader.h"
#include "sd.h"
#include "spudec.h"
// Current code still pushes subs directly to global spudec
#include "sub.h"
struct sd_lavc_priv {
AVCodecContext *avctx;
int count;
struct sub_bitmap *inbitmaps;
struct sub_bitmap *outbitmaps;
bool bitmaps_changed;
double endpts;
};
static void old_avsub_to_spudec(AVSubtitleRect **rects, int num_rects,
double pts, double endpts)
{
int i, xmin = INT_MAX, ymin = INT_MAX, xmax = INT_MIN, ymax = INT_MIN;
struct spu_packet_t *packet;
if (num_rects == 1) {
spudec_set_paletted(vo_spudec,
rects[0]->pict.data[0],
rects[0]->pict.linesize[0],
rects[0]->pict.data[1],
rects[0]->x,
rects[0]->y,
rects[0]->w,
rects[0]->h,
pts,
endpts);
return;
}
for (i = 0; i < num_rects; i++) {
xmin = FFMIN(xmin, rects[i]->x);
ymin = FFMIN(ymin, rects[i]->y);
xmax = FFMAX(xmax, rects[i]->x + rects[i]->w);
ymax = FFMAX(ymax, rects[i]->y + rects[i]->h);
}
packet = spudec_packet_create(xmin, ymin, xmax - xmin, ymax - ymin);
if (!packet)
return;
spudec_packet_clear(packet);
for (i = 0; i < num_rects; i++)
spudec_packet_fill(packet,
rects[i]->pict.data[0],
rects[i]->pict.linesize[0],
rects[i]->pict.data[1],
rects[i]->x - xmin,
rects[i]->y - ymin,
rects[i]->w,
rects[i]->h);
spudec_packet_send(vo_spudec, packet, pts, endpts);
}
static int init(struct sh_sub *sh, struct osd_state *osd)
{
if (sh->initialized)
return 0;
struct sd_lavc_priv *priv = talloc_zero(NULL, struct sd_lavc_priv);
enum CodecID cid = CODEC_ID_NONE;
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;
case 'v':
cid = CODEC_ID_DVD_SUBTITLE; break;
}
AVCodecContext *ctx = NULL;
AVCodec *sub_codec = avcodec_find_decoder(cid);
if (!sub_codec)
goto error;
ctx = avcodec_alloc_context3(sub_codec);
if (!ctx)
goto error;
ctx->extradata_size = sh->extradata_len;
ctx->extradata = sh->extradata;
if (avcodec_open2(ctx, sub_codec, NULL) < 0)
goto error;
priv->avctx = ctx;
sh->context = priv;
return 0;
error:
mp_msg(MSGT_SUBREADER, MSGL_ERR,
"Could not open libavcodec subtitle decoder\n");
av_free(ctx);
talloc_free(priv);
return -1;
}
static void clear(struct sd_lavc_priv *priv)
{
priv->count = 0;
talloc_free(priv->inbitmaps);
talloc_free(priv->outbitmaps);
priv->inbitmaps = priv->outbitmaps = NULL;
priv->bitmaps_changed = true;
priv->endpts = MP_NOPTS_VALUE;
}
static void decode(struct sh_sub *sh, struct osd_state *osd, void *data,
int data_len, double pts, double duration)
{
struct sd_lavc_priv *priv = sh->context;
AVCodecContext *ctx = priv->avctx;
AVSubtitle sub;
AVPacket pkt;
clear(priv);
av_init_packet(&pkt);
pkt.data = data;
pkt.size = data_len;
pkt.pts = pts * 1000;
if (duration >= 0)
pkt.convergence_duration = duration * 1000;
int got_sub;
int res = avcodec_decode_subtitle2(ctx, &sub, &got_sub, &pkt);
if (res < 0 || !got_sub)
return;
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 (vo_spudec && sub.num_rects == 0)
spudec_set_paletted(vo_spudec, NULL, 0, NULL, 0, 0, 0, 0, pts, endpts);
if (sub.num_rects > 0) {
switch (sub.rects[0]->type) {
case SUBTITLE_BITMAP:
// Assume resolution heuristics only work for PGS and DVB
if (!osd->support_rgba || sh->type != 'p' && sh->type != 'b') {
if (!vo_spudec)
vo_spudec = spudec_new_scaled(NULL, ctx->width, ctx->height,
NULL, 0);
old_avsub_to_spudec(sub.rects, sub.num_rects, pts, endpts);
vo_osd_changed(OSDTYPE_SPU);
break;
}
priv->inbitmaps = talloc_array(priv, struct sub_bitmap,
sub.num_rects);
for (int i = 0; i < sub.num_rects; i++) {
struct AVSubtitleRect *r = sub.rects[i];
struct sub_bitmap *b = &priv->inbitmaps[i];
uint32_t *outbmp = talloc_size(priv->inbitmaps,
r->w * r->h * 4);
b->bitmap = outbmp;
b->w = r->w;
b->h = r->h;
b->x = r->x;
b->y = r->y;
uint8_t *inbmp = r->pict.data[0];
uint32_t *palette = (uint32_t *) r->pict.data[1];
for (int y = 0; y < r->h; y++) {
for (int x = 0; x < r->w; x++)
*outbmp++ = palette[*inbmp++];
inbmp += r->pict.linesize[0] - r->w;
};
}
priv->count = sub.num_rects;
priv->endpts = endpts;
break;
default:
mp_msg(MSGT_SUBREADER, MSGL_ERR, "sd_lavc: unsupported subtitle "
"type from libavcodec\n");
break;
}
}
avsubtitle_free(&sub);
}
static void get_bitmaps(struct sh_sub *sh, struct osd_state *osd,
struct sub_bitmaps *res)
{
struct sd_lavc_priv *priv = sh->context;
if (priv->endpts != MP_NOPTS_VALUE && (osd->sub_pts >= priv->endpts ||
osd->sub_pts < priv->endpts - 300))
clear(priv);
if (!osd->support_rgba)
return;
if (priv->bitmaps_changed && priv->count > 0)
priv->outbitmaps = talloc_memdup(priv, priv->inbitmaps,
talloc_get_size(priv->inbitmaps));
bool pos_changed = false;
// Hope that PGS subs set these and 720/576 works for dvb subs
int inw = priv->avctx->width;
if (!inw)
inw = 720;
int inh = priv->avctx->height;
if (!inh)
inh = 576;
struct mp_eosd_res *d = &osd->dim;
double xscale = (double) (d->w - d->ml - d->mr) / inw;
double yscale = (double) (d->h - d->mt - d->mb) / inh;
for (int i = 0; i < priv->count; i++) {
struct sub_bitmap *bi = &priv->inbitmaps[i];
struct sub_bitmap *bo = &priv->outbitmaps[i];
#define SET(var, val) pos_changed |= var != (int)(val); var = (val)
SET(bo->x, bi->x * xscale + d->ml);
SET(bo->y, bi->y * yscale + d->mt);
SET(bo->dw, bi->w * xscale);
SET(bo->dh, bi->h * yscale);
}
res->parts = priv->outbitmaps;
res->part_count = priv->count;
if (priv->bitmaps_changed)
res->bitmap_id = ++res->bitmap_pos_id;
else if (pos_changed)
res->bitmap_pos_id++;
priv->bitmaps_changed = false;
res->type = SUBBITMAP_RGBA;
res->scaled = xscale != 1 || yscale != 1;
}
static void reset(struct sh_sub *sh, struct osd_state *osd)
{
struct sd_lavc_priv *priv = sh->context;
clear(priv);
// lavc might not do this right for all codecs; may need close+reopen
avcodec_flush_buffers(priv->avctx);
}
static void uninit(struct sh_sub *sh)
{
struct sd_lavc_priv *priv = sh->context;
avcodec_close(priv->avctx);
av_free(priv->avctx);
talloc_free(priv);
}
const struct sd_functions sd_lavc = {
.init = init,
.decode = decode,
.get_bitmaps = get_bitmaps,
.reset = reset,
.switch_off = reset,
.uninit = uninit,
};
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