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@@ -29,6 +29,7 @@ |
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#include "bytestream.h" |
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#include "libavutil/colorspace.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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#define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b)) |
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@@ -44,6 +45,7 @@ typedef struct PGSSubPictureReference { |
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int x; |
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int y; |
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int picture_id; |
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int composition; |
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} PGSSubPictureReference; |
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typedef struct PGSSubPresentation { |
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@@ -61,9 +63,11 @@ typedef struct PGSSubPicture { |
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} PGSSubPicture; |
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typedef struct PGSSubContext { |
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AVClass *class; |
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PGSSubPresentation presentation; |
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uint32_t clut[256]; |
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PGSSubPicture pictures[UINT16_MAX]; |
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int forced_subs_only; |
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} PGSSubContext; |
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static av_cold int init_decoder(AVCodecContext *avctx) |
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@@ -283,7 +287,6 @@ static void parse_palette_segment(AVCodecContext *avctx, |
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* @param buf pointer to the packet to process |
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* @param buf_size size of packet to process |
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* @todo TODO: Implement cropping |
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* @todo TODO: Implement forcing of subtitles |
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*/ |
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static void parse_presentation_segment(AVCodecContext *avctx, |
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const uint8_t *buf, int buf_size) |
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@@ -335,12 +338,10 @@ static void parse_presentation_segment(AVCodecContext *avctx, |
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PGSSubPictureReference *reference = &ctx->presentation.objects[object_index]; |
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reference->picture_id = bytestream_get_be16(&buf); |
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/* |
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* Skip 2 bytes of unknown: |
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* window_id_ref, |
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* composition_flag (0x80 - object cropped, 0x40 - object forced) |
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*/ |
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buf += 2; |
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/* Skip window_id_ref */ |
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buf++; |
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/* composition_flag (0x80 - object cropped, 0x40 - object forced) */ |
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reference->composition = bytestream_get_byte(&buf); |
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reference->x = bytestream_get_be16(&buf); |
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reference->y = bytestream_get_be16(&buf); |
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@@ -422,6 +423,7 @@ static int display_end_segment(AVCodecContext *avctx, void *data, |
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sub->rects[rect]->nb_colors = 256; |
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sub->rects[rect]->pict.data[1] = av_mallocz(AVPALETTE_SIZE); |
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if (!ctx->forced_subs_only || ctx->presentation.objects[rect].composition & 0x40) |
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memcpy(sub->rects[rect]->pict.data[1], ctx->clut, sub->rects[rect]->nb_colors * sizeof(uint32_t)); |
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} |
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@@ -503,6 +505,20 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size, |
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return buf_size; |
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} |
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#define OFFSET(x) offsetof(PGSSubContext, x) |
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#define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM |
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static const AVOption options[] = { |
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{"forced_subs_only", "Only show forced subtitles", OFFSET(forced_subs_only), AV_OPT_TYPE_INT, {.dbl = 0}, 0, 1, SD}, |
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{ NULL }, |
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}; |
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static const AVClass pgsdec_class = { |
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.class_name = "PGS subtitle decoder", |
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.item_name = av_default_item_name, |
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.option = options, |
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.version = LIBAVUTIL_VERSION_INT, |
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}; |
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AVCodec ff_pgssub_decoder = { |
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.name = "pgssub", |
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.type = AVMEDIA_TYPE_SUBTITLE, |
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@@ -512,4 +528,5 @@ AVCodec ff_pgssub_decoder = { |
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.close = close_decoder, |
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.decode = decode, |
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.long_name = NULL_IF_CONFIG_SMALL("HDMV Presentation Graphic Stream subtitles"), |
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.priv_class = &pgsdec_class, |
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}; |