return VLC_SUCCESS;
}
+/* FIXME: this routine is a hack to convert VLC_FOURCC('Y','U','V','A')
+ * into VLC_FOURCC('Y','U','V','P')
+ */
+static subpicture_t *YuvaYuvp( encoder_t *p_enc, subpicture_t *p_subpic )
+{
+ subpicture_region_t *p_region = NULL;
+
+ for( p_region = p_subpic->p_region; p_region; p_region = p_region->p_next )
+ {
+ video_format_t *p_fmt = &p_region->fmt;
+ int i = 0, j = 0, n = 0, p = 0;
+ int i_max_entries = 256;
+
+#ifdef RANDOM_DITHERING
+ int i_seed = 0xdeadbeef; /* random seed */
+#else
+ int *pi_delta;
+#endif
+ int i_pixels = p_region->picture.p[0].i_visible_lines
+ * p_region->picture.p[0].i_pitch;
+ int i_iterator = p_region->picture.p[0].i_visible_lines * 3 / 4
+ * p_region->picture.p[0].i_pitch
+ + p_region->picture.p[0].i_pitch * 1 / 3;
+ int i_tolerance = 0;
+
+ p_fmt->i_chroma = VLC_FOURCC('Y','U','V','P');
+ p_fmt->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
+ p_fmt->p_palette->i_entries = 0;
+
+ /* Find best iterator using Euclide’s algorithm */
+ for( ; i_iterator > 1 ; i_iterator-- )
+ {
+ int a = i_pixels;
+ int b = i_iterator;
+ int c;
+
+ while( b )
+ {
+ c = a % b;
+ a = b;
+ b = c;
+ }
+
+ if( a == 1 )
+ {
+ break;
+ }
+ }
+
+ /* Count colors, build best palette */
+ for( i_tolerance = 0; i_tolerance < 128; i_tolerance++ )
+ {
+ vlc_bool_t b_success = VLC_TRUE;
+ p_fmt->p_palette->i_entries = 0;
+
+ for( i = 0; i < i_pixels ; )
+ {
+ uint8_t y, u, v, a;
+ y = p_region->picture.p[0].p_pixels[i];
+ u = p_region->picture.p[1].p_pixels[i];
+ v = p_region->picture.p[2].p_pixels[i];
+ a = p_region->picture.p[3].p_pixels[i];
+ for( j = 0; j < p_fmt->p_palette->i_entries; j++ )
+ {
+ if( abs((int)p_fmt->p_palette->palette[j][0] - (int)y) <= i_tolerance &&
+ abs((int)p_fmt->p_palette->palette[j][1] - (int)u) <= i_tolerance &&
+ abs((int)p_fmt->p_palette->palette[j][2] - (int)v) <= i_tolerance &&
+ abs((int)p_fmt->p_palette->palette[j][3] - (int)a) <= i_tolerance / 2 )
+ {
+ break;
+ }
+ }
+ if( j == p_fmt->p_palette->i_entries )
+ {
+ p_fmt->p_palette->palette[j][0] = y;
+ p_fmt->p_palette->palette[j][1] = u;
+ p_fmt->p_palette->palette[j][2] = v;
+ p_fmt->p_palette->palette[j][3] = a;
+ p_fmt->p_palette->i_entries++;
+ }
+ if( p_fmt->p_palette->i_entries >= i_max_entries )
+ {
+ b_success = VLC_FALSE;
+ break;
+ }
+ i += i_iterator;
+ if( i > i_pixels )
+ {
+ i -= i_pixels;
+ }
+ }
+
+ if( b_success )
+ {
+ break;
+ }
+ }
+
+#if DEBUG_DVBSUB
+ msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
+#endif
+
+#ifndef RANDOM_DITHERING
+ pi_delta = malloc( ( p_region->picture.p[0].i_pitch + 1 )
+ * sizeof(int) * 4 );
+ for( i = 0; i < (p_region->picture.p[0].i_pitch + 1) * 4 ; i++ )
+ {
+ pi_delta[ i ] = 0;
+ }
+#endif
+
+ /* Fill image with our new colours */
+ for( p = 0; p < p_region->picture.p[0].i_visible_lines ; p++ )
+ {
+ int i_ydelta = 0, i_udelta = 0, i_vdelta = 0, i_adelta = 0;
+
+ for( n = 0; n < p_region->picture.p[0].i_pitch ; n++ )
+ {
+ int i_offset = p * p_region->picture.p[0].i_pitch + n;
+ int y, u, v, a;
+ int i_mindist, i_best;
+
+ y = (int)p_region->picture.p[0].p_pixels[i_offset];
+ u = (int)p_region->picture.p[1].p_pixels[i_offset];
+ v = (int)p_region->picture.p[2].p_pixels[i_offset];
+ a = (int)p_region->picture.p[3].p_pixels[i_offset];
+
+ /* Add dithering compensation */
+#ifdef RANDOM_DITHERING
+ y += ((i_seed & 0xff) - 0x80) * i_tolerance / 0x80;
+ u += (((i_seed >> 8) & 0xff) - 0x80) * i_tolerance / 0x80;
+ v += (((i_seed >> 16) & 0xff) - 0x80) * i_tolerance / 0x80;
+ a += (((i_seed >> 24) & 0xff) - 0x80) * i_tolerance / 0x80;
+#else
+ y += i_ydelta + pi_delta[ n * 4 ];
+ u += i_udelta + pi_delta[ n * 4 + 1 ];
+ v += i_vdelta + pi_delta[ n * 4 + 2 ];
+ a += i_adelta + pi_delta[ n * 4 + 3 ];
+#endif
+
+ /* Find best colour in palette */
+ for( i_mindist = 99999999, i_best = 0, j = 0; j < p_fmt->p_palette->i_entries; j++ )
+ {
+ int i_dist = 0;
+
+ i_dist += abs((int)p_fmt->p_palette->palette[j][0] - y);
+ i_dist += abs((int)p_fmt->p_palette->palette[j][1] - u);
+ i_dist += abs((int)p_fmt->p_palette->palette[j][2] - v);
+ i_dist += 2 * abs((int)p_fmt->p_palette->palette[j][3] - a);
+
+ if( i_dist < i_mindist )
+ {
+ i_mindist = i_dist;
+ i_best = j;
+ }
+ }
+
+ /* Set pixel to best color */
+ p_region->picture.p[0].p_pixels[i_offset] = i_best;
+
+ /* Update dithering state */
+#ifdef RANDOM_DITHERING
+ i_seed = (i_seed * 0x1283837) ^ 0x789479 ^ (i_seed >> 13);
+#else
+ i_ydelta = y - (int)p_fmt->p_palette->palette[i_best][0];
+ i_udelta = u - (int)p_fmt->p_palette->palette[i_best][1];
+ i_vdelta = v - (int)p_fmt->p_palette->palette[i_best][2];
+ i_adelta = a - (int)p_fmt->p_palette->palette[i_best][3];
+ pi_delta[ n * 4 ] = i_ydelta * 3 / 8;
+ pi_delta[ n * 4 + 1 ] = i_udelta * 3 / 8;
+ pi_delta[ n * 4 + 2 ] = i_vdelta * 3 / 8;
+ pi_delta[ n * 4 + 3 ] = i_adelta * 3 / 8;
+ i_ydelta = i_ydelta * 5 / 8;
+ i_udelta = i_udelta * 5 / 8;
+ i_vdelta = i_vdelta * 5 / 8;
+ i_adelta = i_adelta * 5 / 8;
+#endif
+ }
+ }
+#ifndef RANDOM_DITHERING
+ free( pi_delta );
+#endif
+
+ /* pad palette */
+ for( i = p_fmt->p_palette->i_entries; i < i_max_entries; i++ )
+ {
+ p_fmt->p_palette->palette[i][0] = 0;
+ p_fmt->p_palette->palette[i][1] = 0;
+ p_fmt->p_palette->palette[i][2] = 0;
+ p_fmt->p_palette->palette[i][3] = 0;
+ }
+ p_fmt->p_palette->i_entries = i_max_entries;
+#if DEBUG_DVBSUB
+ msg_Dbg( p_enc, "best palette has %d colors", p_fmt->p_palette->i_entries );
+#endif
+ }
+ return p_subpic;
+} /* End of hack */
+
/****************************************************************************
* Encode: the whole thing
****************************************************************************/
static block_t *Encode( encoder_t *p_enc, subpicture_t *p_subpic )
{
+ subpicture_t *p_temp = NULL;
+ subpicture_region_t *p_region = NULL;
bs_t bits, *s = &bits;
block_t *p_block;
- if( !p_subpic || !p_subpic->p_region ) return 0;
-
+ if( !p_subpic || !p_subpic->p_region ) return NULL;
+
+ /* FIXME: this is a hack to convert VLC_FOURCC('Y','U','V','A') into
+ * VLC_FOURCC('Y','U','V','P')
+ */
+ p_region = p_subpic->p_region;
+ if( p_region->fmt.i_chroma == VLC_FOURCC('Y','U','V','A') )
+ {
+ p_temp = YuvaYuvp( p_enc, p_subpic );
+ if( !p_temp )
+ {
+ msg_Dbg( p_enc, "no picture in subpicture" );
+ return NULL;
+ }
+ p_region = p_subpic->p_region;
+ }
+ /* Sanity check */
+ if( !p_region ) return NULL;
+ if( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') &&
+ p_region->fmt.i_chroma != VLC_FOURCC('Y','U','V','P') ) return NULL;
+
+ if( p_region->fmt.p_palette &&
+ ( p_region->fmt.p_palette->i_entries != 4 ) &&
+ ( p_region->fmt.p_palette->i_entries != 16 ) &&
+ ( p_region->fmt.p_palette->i_entries != 256 ) )
+ {
+ msg_Err( p_enc, "subpicture palette (%d) not handled",
+ p_region->fmt.p_palette->i_entries );
+ return NULL;
+ }
+ /* End of hack */
+
#if DEBUG_DVBSUB
msg_Dbg( p_enc, "encoding subpicture" );
#endif
projects / vlc / blobdiff