SubtitleProcessorLibASS::SubtitleProcessorLibASS()
: m_ass(0)
, m_renderer(0)
, m_track(0)
{
if (!ass::api::loaded())
return;
m_ass = ass_library_init();
if (!m_ass) {
qWarning("ass_library_init failed!");
return;
}
ass_set_message_cb(m_ass, msg_callback, NULL);
m_renderer = ass_renderer_init(m_ass);
if (!m_renderer) {
qWarning("ass_renderer_init failed!");
return;
}
#if LIBASS_VERSION >= 0x01000000
ass_set_shaper(m_renderer, ASS_SHAPING_SIMPLE);
#endif
//ass_set_frame_size(m_renderer, frame_w, frame_h);
//ass_set_fonts(m_renderer, NULL, "Sans", 1, NULL, 1); //must set!
ass_set_fonts(m_renderer, NULL, NULL, 1, NULL, 1);
}
void mp_ass_configure(ASS_Renderer *priv, struct MPOpts *opts,
struct mp_osd_res *dim)
{
ass_set_frame_size(priv, dim->w, dim->h);
ass_set_margins(priv, dim->mt, dim->mb, dim->ml, dim->mr);
int set_use_margins = 0;
#if LIBASS_VERSION >= 0x01010000
int set_sub_pos = 0;
#endif
float set_line_spacing = 0;
float set_font_scale = 1;
int set_hinting = 0;
if (opts->ass_style_override) {
set_use_margins = opts->ass_use_margins;
#if LIBASS_VERSION >= 0x01010000
set_sub_pos = 100 - opts->sub_pos;
#endif
set_line_spacing = opts->ass_line_spacing;
set_font_scale = opts->sub_scale;
set_hinting = opts->ass_hinting;
}
ass_set_use_margins(priv, set_use_margins);
#if LIBASS_VERSION >= 0x01010000
ass_set_line_position(priv, set_sub_pos);
#endif
#if LIBASS_VERSION >= 0x01000000
ass_set_shaper(priv, opts->ass_shaper);
#endif
ass_set_font_scale(priv, set_font_scale);
ass_set_hinting(priv, set_hinting);
ass_set_line_spacing(priv, set_line_spacing);
}
static int config_input(AVFilterLink *inlink)
{
AssContext *ass = inlink->dst->priv;
ff_draw_init(&ass->draw, inlink->format, ass->alpha ? FF_DRAW_PROCESS_ALPHA : 0);
ass_set_frame_size (ass->renderer, inlink->w, inlink->h);
if (ass->original_w && ass->original_h)
ass_set_aspect_ratio(ass->renderer, (double)inlink->w / inlink->h,
(double)ass->original_w / ass->original_h);
if (ass->shaping != -1)
ass_set_shaper(ass->renderer, ass->shaping);
return 0;
}
void mp_ass_configure(ASS_Renderer *priv, struct MPOpts *opts,
struct mp_osd_res *dim)
{
ass_set_frame_size(priv, dim->w, dim->h);
ass_set_margins(priv, dim->mt, dim->mb, dim->ml, dim->mr);
int set_use_margins = 0;
#if LIBASS_VERSION >= 0x01010000
int set_sub_pos = 0;
#endif
float set_line_spacing = 0;
float set_font_scale = 1;
int set_hinting = 0;
int set_force_override = 0;
if (opts->ass_style_override) {
set_use_margins = opts->ass_use_margins;
#if LIBASS_VERSION >= 0x01010000
set_sub_pos = 100 - opts->sub_pos;
#endif
set_line_spacing = opts->ass_line_spacing;
set_font_scale = opts->sub_scale;
set_hinting = opts->ass_hinting;
set_force_override = opts->ass_style_override == 3;
}
ass_set_use_margins(priv, set_use_margins);
#if LIBASS_VERSION >= 0x01010000
ass_set_line_position(priv, set_sub_pos);
#endif
#if LIBASS_VERSION >= 0x01000000
ass_set_shaper(priv, opts->ass_shaper);
#endif
#if LIBASS_VERSION >= 0x01103000
ass_set_selective_style_override_enabled(priv, set_force_override);
ASS_Style style = {0};
mp_ass_set_style(&style, 288, opts->sub_text_style);
ass_set_selective_style_override(priv, &style);
free(style.FontName);
#endif
ass_set_font_scale(priv, set_font_scale);
ass_set_hinting(priv, set_hinting);
ass_set_line_spacing(priv, set_line_spacing);
}
static void configure_ass(struct sd *sd, struct mp_osd_res *dim,
bool converted, ASS_Track *track)
{
struct MPOpts *opts = sd->opts;
struct sd_ass_priv *ctx = sd->priv;
ASS_Renderer *priv = ctx->ass_renderer;
ass_set_frame_size(priv, dim->w, dim->h);
ass_set_margins(priv, dim->mt, dim->mb, dim->ml, dim->mr);
bool set_use_margins = false;
int set_sub_pos = 0;
float set_line_spacing = 0;
float set_font_scale = 1;
int set_hinting = 0;
bool set_scale_with_window = false;
bool set_scale_by_window = true;
bool total_override = false;
// With forced overrides, apply the --sub-* specific options
if (converted || opts->ass_style_override == 3) {
set_scale_with_window = opts->sub_scale_with_window;
set_use_margins = opts->sub_use_margins;
set_scale_by_window = opts->sub_scale_by_window;
total_override = true;
} else {
set_scale_with_window = opts->ass_scale_with_window;
set_use_margins = opts->ass_use_margins;
}
if (converted || opts->ass_style_override) {
set_sub_pos = 100 - opts->sub_pos;
set_line_spacing = opts->ass_line_spacing;
set_hinting = opts->ass_hinting;
set_font_scale = opts->sub_scale;
}
if (set_scale_with_window) {
int vidh = dim->h - (dim->mt + dim->mb);
set_font_scale *= dim->h / (float)MPMAX(vidh, 1);
}
if (!set_scale_by_window) {
double factor = dim->h / 720.0;
if (factor != 0.0)
set_font_scale /= factor;
}
ass_set_use_margins(priv, set_use_margins);
ass_set_line_position(priv, set_sub_pos);
ass_set_shaper(priv, opts->ass_shaper);
int set_force_flags = 0;
if (total_override)
set_force_flags |= ASS_OVERRIDE_BIT_STYLE | ASS_OVERRIDE_BIT_FONT_SIZE;
if (opts->ass_style_override == 4)
set_force_flags |= ASS_OVERRIDE_BIT_FONT_SIZE;
ass_set_selective_style_override_enabled(priv, set_force_flags);
ASS_Style style = {0};
mp_ass_set_style(&style, 288, opts->sub_text_style);
ass_set_selective_style_override(priv, &style);
free(style.FontName);
if (converted && track->default_style < track->n_styles) {
mp_ass_set_style(track->styles + track->default_style,
track->PlayResY, opts->sub_text_style);
}
ass_set_font_scale(priv, set_font_scale);
ass_set_hinting(priv, set_hinting);
ass_set_line_spacing(priv, set_line_spacing);
}
