ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavcodec/textdec.c

@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2012 Clément Bœsch
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Raw subtitles decoder
+ */
+
+#include "avcodec.h"
+#include "ass.h"
+#include "libavutil/bprint.h"
+#include "libavutil/opt.h"
+
+typedef struct {
+    AVClass *class;
+    const char *linebreaks;
+    int keep_ass_markup;
+} TextContext;
+
+#define OFFSET(x) offsetof(TextContext, x)
+#define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+    { "keep_ass_markup", "Set if ASS tags must be escaped", OFFSET(keep_ass_markup), AV_OPT_TYPE_INT,    {.i64=0}, 0, 1, .flags=SD },
+    { NULL }
+};
+
+static int text_decode_frame(AVCodecContext *avctx, void *data,
+                             int *got_sub_ptr, AVPacket *avpkt)
+{
+    int ret = 0;
+    AVBPrint buf;
+    AVSubtitle *sub = data;
+    const char *ptr = avpkt->data;
+    const TextContext *text = avctx->priv_data;
+    const int ts_start     = av_rescale_q(avpkt->pts,      avctx->time_base, (AVRational){1,100});
+    const int ts_duration  = avpkt->duration != -1 ?
+                             av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1;
+
+    av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
+    if (ptr && avpkt->size > 0 && *ptr) {
+        ff_ass_bprint_text_event(&buf, ptr, avpkt->size, text->linebreaks, text->keep_ass_markup);
+        ret = ff_ass_add_rect_bprint(sub, &buf, ts_start, ts_duration);
+    }
+    av_bprint_finalize(&buf, NULL);
+    if (ret < 0)
+        return ret;
+    *got_sub_ptr = sub->num_rects > 0;
+    return avpkt->size;
+}
+
+#define DECLARE_CLASS(decname) static const AVClass decname ## _decoder_class = {   \
+    .class_name = #decname " decoder",      \
+    .item_name  = av_default_item_name,     \
+    .option     = decname ## _options,      \
+    .version    = LIBAVUTIL_VERSION_INT,    \
+}
+
+#if CONFIG_TEXT_DECODER
+#define text_options options
+DECLARE_CLASS(text);
+
+AVCodec ff_text_decoder = {
+    .name           = "text",
+    .long_name      = NULL_IF_CONFIG_SMALL("Raw text subtitle"),
+    .priv_data_size = sizeof(TextContext),
+    .type           = AVMEDIA_TYPE_SUBTITLE,
+    .id             = AV_CODEC_ID_TEXT,
+    .decode         = text_decode_frame,
+    .init           = ff_ass_subtitle_header_default,
+    .priv_class     = &text_decoder_class,
+};
+#endif
+
+#if CONFIG_VPLAYER_DECODER || CONFIG_PJS_DECODER || CONFIG_SUBVIEWER1_DECODER || CONFIG_STL_DECODER
+
+static int linebreak_init(AVCodecContext *avctx)
+{
+    TextContext *text = avctx->priv_data;
+    text->linebreaks = "|";
+    return ff_ass_subtitle_header_default(avctx);
+}
+
+#if CONFIG_VPLAYER_DECODER
+#define vplayer_options options
+DECLARE_CLASS(vplayer);
+
+AVCodec ff_vplayer_decoder = {
+    .name           = "vplayer",
+    .long_name      = NULL_IF_CONFIG_SMALL("VPlayer subtitle"),
+    .priv_data_size = sizeof(TextContext),
+    .type           = AVMEDIA_TYPE_SUBTITLE,
+    .id             = AV_CODEC_ID_VPLAYER,
+    .decode         = text_decode_frame,
+    .init           = linebreak_init,
+    .priv_class     = &vplayer_decoder_class,
+};
+#endif
+
+#if CONFIG_STL_DECODER
+#define stl_options options
+DECLARE_CLASS(stl);
+
+AVCodec ff_stl_decoder = {
+    .name           = "stl",
+    .long_name      = NULL_IF_CONFIG_SMALL("Spruce subtitle format"),
+    .priv_data_size = sizeof(TextContext),
+    .type           = AVMEDIA_TYPE_SUBTITLE,
+    .id             = AV_CODEC_ID_STL,
+    .decode         = text_decode_frame,
+    .init           = linebreak_init,
+    .priv_class     = &stl_decoder_class,
+};
+#endif
+
+#if CONFIG_PJS_DECODER
+#define pjs_options options
+DECLARE_CLASS(pjs);
+
+AVCodec ff_pjs_decoder = {
+    .name           = "pjs",
+    .long_name      = NULL_IF_CONFIG_SMALL("PJS subtitle"),
+    .priv_data_size = sizeof(TextContext),
+    .type           = AVMEDIA_TYPE_SUBTITLE,
+    .id             = AV_CODEC_ID_PJS,
+    .decode         = text_decode_frame,
+    .init           = linebreak_init,
+    .priv_class     = &pjs_decoder_class,
+};
+#endif
+
+#if CONFIG_SUBVIEWER1_DECODER
+#define subviewer1_options options
+DECLARE_CLASS(subviewer1);
+
+AVCodec ff_subviewer1_decoder = {
+    .name           = "subviewer1",
+    .long_name      = NULL_IF_CONFIG_SMALL("SubViewer1 subtitle"),
+    .priv_data_size = sizeof(TextContext),
+    .type           = AVMEDIA_TYPE_SUBTITLE,
+    .id             = AV_CODEC_ID_SUBVIEWER1,
+    .decode         = text_decode_frame,
+    .init           = linebreak_init,
+    .priv_class     = &subviewer1_decoder_class,
+};
+#endif
+
+#endif /* text subtitles with '|' line break */