From 09d6fe89be1815fec7a71f355ded46a1b40d0ade Mon Sep 17 00:00:00 2001 From: Shin-ichi Toyama Date: Tue, 11 Nov 2014 23:02:10 +0900 Subject: [PATCH] New option for obtaining global palette from .IFO file --- doc/decoders.texi | 3 +++ libavcodec/dvdsubdec.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+) diff --git a/doc/decoders.texi b/doc/decoders.texi index ae20cea..02ff475 100644 --- a/doc/decoders.texi +++ b/doc/decoders.texi @@ -191,6 +191,9 @@ numbers (without 0x prefix) separated by comas, for example @code{0d00ee, ee450d, 101010, eaeaea, 0ce60b, ec14ed, ebff0b, 0d617a, 7b7b7b, d1d1d1, 7b2a0e, 0d950c, 0f007b, cf0dec, cfa80c, 7c127b}. +@item use_ifo_palette +Specify the the IFO file from which the global palette is obtained. + @item forced_subs_only Only decode subtitle entries marked as forced. Some titles have forced and non-forced subtitles in the same track. Setting this flag to @code{1} diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c index bb28d9e..5981c37 100644 --- a/libavcodec/dvdsubdec.c +++ b/libavcodec/dvdsubdec.c @@ -28,12 +28,14 @@ #include "libavutil/opt.h" #include "libavutil/imgutils.h" #include "libavutil/avstring.h" +#include "libavutil/bswap.h" typedef struct DVDSubContext { AVClass *class; uint32_t palette[16]; char *palette_str; + char *ifo_str; int has_palette; uint8_t colormap[4]; uint8_t alpha[256]; @@ -583,6 +585,55 @@ static void parse_palette(DVDSubContext *ctx, char *p) } } +static void parse_ifo_palette(DVDSubContext *ctx, char *p) +{ + FILE *in; + char ifostr[12]; + uint32_t sp_pgci, pgci, off_pgc, pgc; + uint8_t yuv[16][4], r, g, b; + int i, y, cb, cr; + int r_add, g_add, b_add; + const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; + + ctx->has_palette = 0; + if ((in = fopen(p, "r")) == NULL) { + av_log(NULL, AV_LOG_WARNING, "[dvdsubdec.c] Failed to open IFO file \"%s\": %s\n", p, strerror(errno)); + return; + } + fread(ifostr, 12, 1, in); + if (strncmp (ifostr, "DVDVIDEO-VTS", 12) != 0){ + av_log(NULL, AV_LOG_WARNING, "[dvdsubdec.c] \"%s\" is not a proper IFO file\n", p); + return; + } + fseek(in, 0xCC, SEEK_SET); + if (fread(&sp_pgci, 4, 1, in) == 1) { + pgci = av_be2ne32(sp_pgci) * 2048; + fprintf(stderr, "position of off_pgc = %d\n", pgci + 0x0C); + fseek(in, pgci + 0x0C, SEEK_SET); + if (fread(&off_pgc, 4, 1, in) == 1) { + pgc = pgci + av_be2ne32(off_pgc); + fprintf(stderr, "palette position = %d\n", pgc + 0xA4); + fseek(in, pgc + 0xA4, SEEK_SET); + if (fread(yuv, sizeof(yuv), 1, in) == 1){ + ctx->has_palette = 1; + for(i=0;i<16;i++) { + y = yuv[i][1]; + cr = yuv[i][2]; + cb = yuv[i][3]; + YUV_TO_RGB1_CCIR(cb, cr); + YUV_TO_RGB2_CCIR(r, g, b, y); + ctx->palette[i] = (r << 16) + (g << 8) + b; + } + } + } + } + if (ctx->has_palette == 0) { + av_log(NULL, AV_LOG_WARNING, "[dvdsubdec.c] Failed to read palette from IFO file \"%s\"\n", p); + } + fclose(in); + return; +} + static int dvdsub_parse_extradata(AVCodecContext *avctx) { DVDSubContext *ctx = (DVDSubContext*) avctx->priv_data; @@ -631,6 +682,8 @@ static av_cold int dvdsub_init(AVCodecContext *avctx) if ((ret = dvdsub_parse_extradata(avctx)) < 0) return ret; + if (ctx->ifo_str) + parse_ifo_palette(ctx, ctx->ifo_str); if (ctx->palette_str) parse_palette(ctx, ctx->palette_str); if (ctx->has_palette) { @@ -656,6 +709,7 @@ static av_cold int dvdsub_close(AVCodecContext *avctx) #define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { { "palette", "set the global palette", OFFSET(palette_str), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, SD }, + { "use_ifo_palette", "obtain the global palette from .IFO file", OFFSET(ifo_str), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, SD }, { "forced_subs_only", "Only show forced subtitles", OFFSET(forced_subs_only), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, SD}, { NULL } }; -- 1.8.1.msysgit.1