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mpv/sub/sd_ass.c
Uoti Urpala 1959ba006c subs, vo_vdpau: support RGBA color for PGS subtitles
Support passing bitmap subtitles to VOs in full RGBA color, and
implement this for libavcodec-decoded subtitle formats on decoding
side and vo_vdpau on display side. Currently this is enabled for PGS
(blu-ray) and DVB subtitles.

VDPAU seems to have sampling issues similar to known GL ones when
drawing a sub-rectangle from a larger texture with scaling, where
adjacent pixels outside the specified source rectangle affect the
result. As the bitmap subtitles may be scaled, add padding support to
the bitmap packer code.

In principle, this could be used for colored DVD subtitles too.
However, the libavcodec DVD decoder lacks parts of the resolution and
palette handling that are present in spudec.c.

Conflicts:
	libvo/vo_gl.c
	sub/dec_sub.h
	sub/sd_lavc.c
2012-09-18 21:07:30 +02:00

206 lines
6.1 KiB
C

/*
* 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 <stdlib.h>
#include <ass/ass.h>
#include <assert.h>
#include <string.h>
#include "talloc.h"
#include "options.h"
#include "mpcommon.h"
#include "mp_msg.h"
#include "libmpdemux/stheader.h"
#include "sub.h"
#include "ass_mp.h"
#include "sd.h"
#include "subassconvert.h"
struct sd_ass_priv {
struct ass_track *ass_track;
bool vsfilter_aspect;
bool incomplete_event;
};
static void free_last_event(ASS_Track *track)
{
assert(track->n_events > 0);
ass_free_event(track, track->n_events - 1);
track->n_events--;
}
static int init(struct sh_sub *sh, struct osd_state *osd)
{
struct sd_ass_priv *ctx;
if (sh->initialized) {
ctx = sh->context;
} else {
ctx = talloc_zero(NULL, struct sd_ass_priv);
sh->context = ctx;
if (sh->type == 'a') {
ctx->ass_track = ass_new_track(osd->ass_library);
if (sh->extradata)
ass_process_codec_private(ctx->ass_track, sh->extradata,
sh->extradata_len);
} else
ctx->ass_track = mp_ass_default_track(osd->ass_library, sh->opts);
}
ctx->vsfilter_aspect = sh->type == 'a';
return 0;
}
static void decode(struct sh_sub *sh, struct osd_state *osd, void *data,
int data_len, double pts, double duration)
{
unsigned char *text = data;
struct sd_ass_priv *ctx = sh->context;
ASS_Track *track = ctx->ass_track;
if (sh->type == 'a') { // ssa/ass subs
ass_process_chunk(track, data, data_len,
(long long)(pts*1000 + 0.5),
(long long)(duration*1000 + 0.5));
return;
}
// plaintext subs
if (pts == MP_NOPTS_VALUE) {
mp_msg(MSGT_SUBREADER, MSGL_WARN, "Subtitle without pts, ignored\n");
return;
}
long long ipts = pts * 1000 + 0.5;
long long iduration = duration * 1000 + 0.5;
if (ctx->incomplete_event) {
ctx->incomplete_event = false;
ASS_Event *event = track->events + track->n_events - 1;
if (ipts <= event->Start)
free_last_event(track);
else
event->Duration = ipts - event->Start;
}
// Note: we rely on there being guaranteed 0 bytes after data packets
int len = strlen(text);
if (len < 5) {
// Some tracks use a whitespace (but not empty) packet to mark end
// of previous subtitle.
for (int i = 0; i < len; i++)
if (!strchr(" \f\n\r\t\v", text[i]))
goto not_all_whitespace;
return;
}
not_all_whitespace:;
char buf[500];
subassconvert_subrip(text, buf, sizeof(buf));
for (int i = 0; i < track->n_events; i++)
if (track->events[i].Start == ipts
&& (duration <= 0 || track->events[i].Duration == iduration)
&& strcmp(track->events[i].Text, buf) == 0)
return; // We've already added this subtitle
if (duration <= 0) {
iduration = 10000;
ctx->incomplete_event = true;
}
int eid = ass_alloc_event(track);
ASS_Event *event = track->events + eid;
event->Start = ipts;
event->Duration = iduration;
event->Style = track->default_style;
event->Text = strdup(buf);
}
static void get_bitmaps(struct sh_sub *sh, struct osd_state *osd,
struct sub_bitmaps *res)
{
struct sd_ass_priv *ctx = sh->context;
struct MPOpts *opts = osd->opts;
if (osd->sub_pts == MP_NOPTS_VALUE)
return;
double scale = osd->normal_scale;
if (ctx->vsfilter_aspect && opts->ass_vsfilter_aspect_compat)
scale = osd->vsfilter_scale;
ASS_Renderer *renderer = osd->ass_renderer;
mp_ass_configure(renderer, opts, &osd->dim, osd->unscaled);
ass_set_aspect_ratio(renderer, scale, 1);
int changed;
res->imgs = ass_render_frame(renderer, ctx->ass_track,
osd->sub_pts * 1000 + .5, &changed);
if (changed == 2)
res->bitmap_id = ++res->bitmap_pos_id;
else if (changed)
res->bitmap_pos_id++;
res->type = SUBBITMAP_LIBASS;
}
static void reset(struct sh_sub *sh, struct osd_state *osd)
{
struct sd_ass_priv *ctx = sh->context;
if (ctx->incomplete_event)
free_last_event(ctx->ass_track);
ctx->incomplete_event = false;
}
static void uninit(struct sh_sub *sh)
{
struct sd_ass_priv *ctx = sh->context;
ass_free_track(ctx->ass_track);
talloc_free(ctx);
}
const struct sd_functions sd_ass = {
.init = init,
.decode = decode,
.get_bitmaps = get_bitmaps,
.reset = reset,
.switch_off = reset,
.uninit = uninit,
};
struct sh_sub *sd_ass_create_from_track(struct ass_track *track,
bool vsfilter_aspect,
struct MPOpts *opts)
{
struct sh_sub *sh = talloc(NULL, struct sh_sub);
*sh = (struct sh_sub) {
.opts = opts,
.type = 'a',
.sd_driver = &sd_ass,
.context = talloc_struct(sh, struct sd_ass_priv, {
.ass_track = track,
.vsfilter_aspect = vsfilter_aspect,
}),
.initialized = true,
};
return sh;
}
struct ass_track *sub_get_ass_track(struct osd_state *osd)
{
struct sh_sub *sh = osd ? osd->sh_sub : NULL;
if (sh && sh->sd_driver == &sd_ass && sh->context) {
struct sd_ass_priv *ctx = sh->context;
return ctx->ass_track;
}
return NULL;
}