mirror of
https://github.com/mpv-player/mpv
synced 2024-09-12 23:45:53 +02:00
ffb7a2fe17
One sub_bitmaps struct could contain either a libass ASS_Image list, or a mplayer native list of sub-bitmaps. This caused code duplication in vo_vdpau.c and bitmap_packer.c. Avoid this by creating such a sub_bitmap array even with libass. This basically copies the list and recreates it in mplayer's native format. It gets rid of the code duplication, and will make implementing extended subtitle and OSD rendering in other VOs easier. Also do some cosmetic changes and other preparations for the following commits.
232 lines
6.9 KiB
C
232 lines
6.9 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdlib.h>
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#include <ass/ass.h>
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#include <assert.h>
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#include <string.h>
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#include "talloc.h"
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#include "options.h"
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#include "mpcommon.h"
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#include "mp_msg.h"
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#include "libmpdemux/stheader.h"
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#include "sub.h"
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#include "ass_mp.h"
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#include "sd.h"
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#include "subassconvert.h"
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struct sd_ass_priv {
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struct ass_track *ass_track;
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bool vsfilter_aspect;
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bool incomplete_event;
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struct sub_bitmap *parts;
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};
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static void free_last_event(ASS_Track *track)
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{
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assert(track->n_events > 0);
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ass_free_event(track, track->n_events - 1);
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track->n_events--;
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}
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static int init(struct sh_sub *sh, struct osd_state *osd)
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{
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struct sd_ass_priv *ctx;
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if (sh->initialized) {
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ctx = sh->context;
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} else {
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ctx = talloc_zero(NULL, struct sd_ass_priv);
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sh->context = ctx;
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if (sh->type == 'a') {
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ctx->ass_track = ass_new_track(osd->ass_library);
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if (sh->extradata)
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ass_process_codec_private(ctx->ass_track, sh->extradata,
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sh->extradata_len);
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} else
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ctx->ass_track = mp_ass_default_track(osd->ass_library, sh->opts);
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}
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ctx->vsfilter_aspect = sh->type == 'a';
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return 0;
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}
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static void decode(struct sh_sub *sh, struct osd_state *osd, void *data,
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int data_len, double pts, double duration)
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{
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unsigned char *text = data;
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struct sd_ass_priv *ctx = sh->context;
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ASS_Track *track = ctx->ass_track;
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if (sh->type == 'a') { // ssa/ass subs
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ass_process_chunk(track, data, data_len,
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(long long)(pts*1000 + 0.5),
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(long long)(duration*1000 + 0.5));
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return;
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}
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// plaintext subs
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if (pts == MP_NOPTS_VALUE) {
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mp_msg(MSGT_SUBREADER, MSGL_WARN, "Subtitle without pts, ignored\n");
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return;
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}
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long long ipts = pts * 1000 + 0.5;
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long long iduration = duration * 1000 + 0.5;
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if (ctx->incomplete_event) {
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ctx->incomplete_event = false;
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ASS_Event *event = track->events + track->n_events - 1;
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if (ipts <= event->Start)
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free_last_event(track);
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else
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event->Duration = ipts - event->Start;
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}
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// Note: we rely on there being guaranteed 0 bytes after data packets
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int len = strlen(text);
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if (len < 5) {
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// Some tracks use a whitespace (but not empty) packet to mark end
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// of previous subtitle.
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for (int i = 0; i < len; i++)
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if (!strchr(" \f\n\r\t\v", text[i]))
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goto not_all_whitespace;
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return;
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}
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not_all_whitespace:;
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char buf[500];
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subassconvert_subrip(text, buf, sizeof(buf));
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for (int i = 0; i < track->n_events; i++)
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if (track->events[i].Start == ipts
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&& (duration <= 0 || track->events[i].Duration == iduration)
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&& strcmp(track->events[i].Text, buf) == 0)
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return; // We've already added this subtitle
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if (duration <= 0) {
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iduration = 10000;
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ctx->incomplete_event = true;
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}
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int eid = ass_alloc_event(track);
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ASS_Event *event = track->events + eid;
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event->Start = ipts;
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event->Duration = iduration;
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event->Style = track->default_style;
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event->Text = strdup(buf);
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}
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static void get_bitmaps(struct sh_sub *sh, struct osd_state *osd,
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struct sub_bitmaps *res)
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{
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struct sd_ass_priv *ctx = sh->context;
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struct MPOpts *opts = osd->opts;
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if (osd->sub_pts == MP_NOPTS_VALUE)
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return;
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double scale = osd->normal_scale;
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if (ctx->vsfilter_aspect && opts->ass_vsfilter_aspect_compat)
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scale = osd->vsfilter_scale;
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ASS_Renderer *renderer = osd->ass_renderer;
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mp_ass_configure(renderer, opts, &osd->dim, osd->unscaled);
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ass_set_aspect_ratio(renderer, scale, 1);
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int changed;
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res->imgs = ass_render_frame(renderer, ctx->ass_track,
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osd->sub_pts * 1000 + .5, &changed);
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if (changed == 2)
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res->bitmap_id = ++res->bitmap_pos_id;
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else if (changed)
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res->bitmap_pos_id++;
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res->format = SUBBITMAP_LIBASS;
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int num_parts = 0;
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int num_parts_alloc = MP_TALLOC_ELEMS(ctx->parts);
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struct ass_image *img = res->imgs;
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while (img) {
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if (img->w == 0 || img->h == 0)
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continue;
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if (num_parts >= num_parts_alloc) {
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num_parts_alloc = FFMAX(num_parts_alloc * 2, 32);
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ctx->parts = talloc_realloc(ctx, ctx->parts, struct sub_bitmap,
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num_parts_alloc);
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}
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struct sub_bitmap *p = &ctx->parts[num_parts];
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p->bitmap = img->bitmap;
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p->stride = img->stride;
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p->libass.color = img->color;
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p->dw = p->w = img->w;
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p->dh = p->h = img->h;
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p->x = img->dst_x;
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p->y = img->dst_y;
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img = img->next;
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num_parts++;
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}
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res->parts = ctx->parts;
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res->num_parts = num_parts;
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}
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static void reset(struct sh_sub *sh, struct osd_state *osd)
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{
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struct sd_ass_priv *ctx = sh->context;
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if (ctx->incomplete_event)
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free_last_event(ctx->ass_track);
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ctx->incomplete_event = false;
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}
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static void uninit(struct sh_sub *sh)
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{
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struct sd_ass_priv *ctx = sh->context;
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ass_free_track(ctx->ass_track);
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talloc_free(ctx);
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}
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const struct sd_functions sd_ass = {
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.init = init,
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.decode = decode,
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.get_bitmaps = get_bitmaps,
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.reset = reset,
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.switch_off = reset,
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.uninit = uninit,
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};
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struct sh_sub *sd_ass_create_from_track(struct ass_track *track,
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bool vsfilter_aspect,
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struct MPOpts *opts)
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{
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struct sh_sub *sh = talloc(NULL, struct sh_sub);
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*sh = (struct sh_sub) {
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.opts = opts,
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.type = 'a',
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.sd_driver = &sd_ass,
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.context = talloc_struct(sh, struct sd_ass_priv, {
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.ass_track = track,
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.vsfilter_aspect = vsfilter_aspect,
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}),
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.initialized = true,
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};
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return sh;
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}
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struct ass_track *sub_get_ass_track(struct osd_state *osd)
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{
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struct sh_sub *sh = osd ? osd->sh_sub : NULL;
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if (sh && sh->sd_driver == &sd_ass && sh->context) {
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struct sd_ass_priv *ctx = sh->context;
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return ctx->ass_track;
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}
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return NULL;
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}
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