+
+/**********************************************************************
+ * hb_subtitle_copy
+ **********************************************************************
+ *
+ *********************************************************************/
+hb_subtitle_t *hb_subtitle_copy(const hb_subtitle_t *src)
+{
+ hb_subtitle_t *subtitle = NULL;
+
+ if( src )
+ {
+ subtitle = calloc(1, sizeof(*subtitle));
+ memcpy(subtitle, src, sizeof(*subtitle));
+ }
+ return subtitle;
+}
+
+/**********************************************************************
+ * hb_subtitle_add
+ **********************************************************************
+ *
+ *********************************************************************/
+int hb_subtitle_add(const hb_job_t * job, const hb_subtitle_config_t * subtitlecfg, int track)
+{
+ hb_title_t *title = job->title;
+ hb_subtitle_t *subtitle;
+
+ subtitle = hb_subtitle_copy( hb_list_item( title->list_subtitle, track ) );
+ if( subtitle == NULL )
+ {
+ /* We fail! */
+ return 0;
+ }
+ subtitle->config = *subtitlecfg;
+ hb_list_add(job->list_subtitle, subtitle);
+ return 1;
+}
+
+int hb_srt_add( const hb_job_t * job,
+ const hb_subtitle_config_t * subtitlecfg,
+ const char *lang )
+{
+ hb_subtitle_t *subtitle;
+ iso639_lang_t *language = NULL;
+ int retval = 0;
+
+ subtitle = calloc( 1, sizeof( *subtitle ) );
+
+ subtitle->id = (hb_list_count(job->list_subtitle) << 8) | 0xFF;
+ subtitle->format = TEXTSUB;
+ subtitle->source = SRTSUB;
+
+ language = lang_for_code2( lang );
+
+ if( language )
+ {
+
+ strcpy( subtitle->lang, language->eng_name );
+ strncpy( subtitle->iso639_2, lang, 4 );
+
+ subtitle->config = *subtitlecfg;
+ subtitle->config.dest = PASSTHRUSUB;
+
+ hb_list_add(job->list_subtitle, subtitle);
+ retval = 1;
+ }
+ return retval;
+}
+
+char * hb_strdup_printf( char * fmt, ... )
+{
+ int len;
+ va_list ap;
+ int size = 256;
+ char * str;
+ char * tmp;
+
+ str = malloc( size );
+ if ( str == NULL )
+ return NULL;
+
+ while (1)
+ {
+ /* Try to print in the allocated space. */
+ va_start( ap, fmt );
+ len = vsnprintf( str, size, fmt, ap );
+ va_end( ap );
+
+ /* If that worked, return the string. */
+ if ( len > -1 && len < size )
+ {
+ return str;
+ }
+
+ /* Else try again with more space. */
+ if ( len > -1 ) /* glibc 2.1 */
+ size = len + 1; /* precisely what is needed */
+ else /* glibc 2.0 */
+ size *= 2; /* twice the old size */
+ tmp = realloc( str, size );
+ if ( tmp == NULL )
+ {
+ free( str );
+ return NULL;
+ }
+ else
+ str = tmp;
+ }
+}
+
+/**********************************************************************
+ * hb_yuv2rgb
+ **********************************************************************
+ * Converts a YCbCr pixel to an RGB pixel.
+ *
+ * This conversion is lossy (due to rounding and clamping).
+ *
+ * Algorithm:
+ * http://en.wikipedia.org/w/index.php?title=YCbCr&oldid=361987695#Technical_details
+ *********************************************************************/
+int hb_yuv2rgb(int yuv)
+{
+ double y, Cr, Cb;
+ int r, g, b;
+
+ y = (yuv >> 16) & 0xff;
+ Cb = (yuv >> 8) & 0xff;
+ Cr = (yuv ) & 0xff;
+
+ r = 1.164 * (y - 16) + 2.018 * (Cb - 128);
+ g = 1.164 * (y - 16) - 0.813 * (Cr - 128) - 0.391 * (Cb - 128);
+ b = 1.164 * (y - 16) + 1.596 * (Cr - 128);
+
+ r = (r < 0) ? 0 : r;
+ g = (g < 0) ? 0 : g;
+ b = (b < 0) ? 0 : b;
+
+ r = (r > 255) ? 255 : r;
+ g = (g > 255) ? 255 : g;
+ b = (b > 255) ? 255 : b;
+
+ return (r << 16) | (g << 8) | b;
+}
+
+/**********************************************************************
+ * hb_rgb2yuv
+ **********************************************************************
+ * Converts an RGB pixel to a YCbCr pixel.
+ *
+ * This conversion is lossy (due to rounding and clamping).
+ *
+ * Algorithm:
+ * http://en.wikipedia.org/w/index.php?title=YCbCr&oldid=361987695#Technical_details
+ *********************************************************************/
+int hb_rgb2yuv(int rgb)
+{
+ double r, g, b;
+ int y, Cr, Cb;
+
+ r = (rgb >> 16) & 0xff;
+ g = (rgb >> 8) & 0xff;
+ b = (rgb ) & 0xff;
+
+ y = 16. + ( 0.257 * r) + (0.504 * g) + (0.098 * b);
+ Cb = 128. + (-0.148 * r) - (0.291 * g) + (0.439 * b);
+ Cr = 128. + ( 0.439 * r) - (0.368 * g) - (0.071 * b);
+
+ y = (y < 0) ? 0 : y;
+ Cb = (Cb < 0) ? 0 : Cb;
+ Cr = (Cr < 0) ? 0 : Cr;
+
+ y = (y > 255) ? 255 : y;
+ Cb = (Cb > 255) ? 255 : Cb;
+ Cr = (Cr > 255) ? 255 : Cr;
+
+ return (y << 16) | (Cb << 8) | Cr;
+}
+