[FFmpeg-cvslog] Binary text decoder
Peter Ross
git at videolan.org
Fri Sep 16 06:14:16 CEST 2011
ffmpeg | branch: master | Peter Ross <pross at xvid.org> | Fri Sep 16 04:50:26 2011 +0200| [07a70caba7cb2fac69bf9541914d4bffce61d1ea] | committer: Michael Niedermayer
Binary text decoder
Decoder and demuxer for various binary text formats.
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=07a70caba7cb2fac69bf9541914d4bffce61d1ea
---
Changelog | 1 +
doc/general.texi | 4 +
libavcodec/Makefile | 3 +
libavcodec/allcodecs.c | 5 +
libavcodec/avcodec.h | 3 +
libavcodec/bintext.c | 252 +++++++++++++++++++++++++++++++
libavcodec/bintext.h | 37 +++++
libavformat/Makefile | 4 +
libavformat/allformats.c | 4 +
libavformat/bintext.c | 376 ++++++++++++++++++++++++++++++++++++++++++++++
10 files changed, 689 insertions(+), 0 deletions(-)
diff --git a/Changelog b/Changelog
index 9a7732a..d3f3f6e 100644
--- a/Changelog
+++ b/Changelog
@@ -54,6 +54,7 @@ easier to use. The changes are:
- Optional C++ Support (needed for libstagefright)
- H.264 Decoding on Android via Stagefright
- Prores decoder
+- BIN/XBIN/ADF/IDF text file decoder
version 0.8:
diff --git a/doc/general.texi b/doc/general.texi
index 9346a87..c89f6e8 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -51,6 +51,7 @@ library:
@tab Multimedia format used in games like Mad Dog McCree.
@item 3GPP AMR @tab X @tab X
@item Apple HTTP Live Streaming @tab @tab X
+ at item Artworx Data Format @tab @tab X
@item ASF @tab X @tab X
@item AVI @tab X @tab X
@item AVISynth @tab @tab X
@@ -60,6 +61,7 @@ library:
@tab Audio and video format used in some games by Beam Software.
@item Bethesda Softworks VID @tab @tab X
@tab Used in some games from Bethesda Softworks.
+ at item Binary text @tab @tab C
@item Bink @tab @tab X
@tab Multimedia format used by many games.
@item Bitmap Brothers JV @tab @tab X
@@ -106,6 +108,7 @@ library:
@item GXF @tab X @tab X
@tab General eXchange Format SMPTE 360M, used by Thomson Grass Valley
playout servers.
+ at item iCEDraw File @tab @tab X
@item id Quake II CIN video @tab @tab X
@item id RoQ @tab X @tab X
@tab Used in Quake III, Jedi Knight 2, other computer games.
@@ -267,6 +270,7 @@ library:
@tab Microsoft video container used in Xbox games.
@item xWMA @tab @tab X
@tab Microsoft audio container used by XAudio 2.
+ at item eXtended BINary text (XBIN) @tab @tab X
@item YUV4MPEG pipe @tab X @tab X
@item Psygnosis YOP @tab @tab X
@end multitable
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index fe1ff2a..408317e 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -96,6 +96,7 @@ OBJS-$(CONFIG_BFI_DECODER) += bfi.o
OBJS-$(CONFIG_BINK_DECODER) += bink.o binkdsp.o
OBJS-$(CONFIG_BINKAUDIO_DCT_DECODER) += binkaudio.o wma.o
OBJS-$(CONFIG_BINKAUDIO_RDFT_DECODER) += binkaudio.o wma.o
+OBJS-$(CONFIG_BINTEXT_DECODER) += bintext.o cga_data.o
OBJS-$(CONFIG_BMP_DECODER) += bmp.o msrledec.o
OBJS-$(CONFIG_BMP_ENCODER) += bmpenc.o
OBJS-$(CONFIG_C93_DECODER) += c93.o
@@ -188,6 +189,7 @@ OBJS-$(CONFIG_H264_VAAPI_HWACCEL) += vaapi_h264.o
OBJS-$(CONFIG_HUFFYUV_DECODER) += huffyuv.o
OBJS-$(CONFIG_HUFFYUV_ENCODER) += huffyuv.o
OBJS-$(CONFIG_IDCIN_DECODER) += idcinvideo.o
+OBJS-$(CONFIG_IDF_DECODER) += bintext.o cga_data.o
OBJS-$(CONFIG_IFF_BYTERUN1_DECODER) += iff.o
OBJS-$(CONFIG_IFF_ILBM_DECODER) += iff.o
OBJS-$(CONFIG_IMC_DECODER) += imc.o
@@ -440,6 +442,7 @@ OBJS-$(CONFIG_WS_SND1_DECODER) += ws-snd1.o
OBJS-$(CONFIG_XAN_DPCM_DECODER) += dpcm.o
OBJS-$(CONFIG_XAN_WC3_DECODER) += xan.o
OBJS-$(CONFIG_XAN_WC4_DECODER) += xxan.o
+OBJS-$(CONFIG_XBIN_DECODER) += bintext.o cga_data.o
OBJS-$(CONFIG_XL_DECODER) += xl.o
OBJS-$(CONFIG_XSUB_DECODER) += xsubdec.o
OBJS-$(CONFIG_XSUB_ENCODER) += xsubenc.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 8734f5d..309d762 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -393,6 +393,11 @@ void avcodec_register_all(void)
REGISTER_ENCODER (LIBXAVS, libxavs);
REGISTER_ENCODER (LIBXVID, libxvid);
+ /* text */
+ REGISTER_DECODER (BINTEXT, bintext);
+ REGISTER_DECODER (XBIN, xbin);
+ REGISTER_DECODER (IDF, idf);
+
/* parsers */
REGISTER_PARSER (AAC, aac);
REGISTER_PARSER (AAC_LATM, aac_latm);
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 4ce084c..f8f4f69 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -361,6 +361,9 @@ enum CodecID {
/* other specific kind of codecs (generally used for attachments) */
CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
CODEC_ID_TTF= 0x18000,
+ CODEC_ID_BINTEXT,
+ CODEC_ID_XBIN,
+ CODEC_ID_IDF,
CODEC_ID_PROBE= 0x19000, ///< codec_id is not known (like CODEC_ID_NONE) but lavf should attempt to identify it
diff --git a/libavcodec/bintext.c b/libavcodec/bintext.c
new file mode 100644
index 0000000..0726d46
--- /dev/null
+++ b/libavcodec/bintext.c
@@ -0,0 +1,252 @@
+/*
+ * Binary text decoder
+ * eXtended BINary text (XBIN) decoder
+ * iCEDraw File decoder
+ * Copyright (c) 2010 Peter Ross (pross at xvid.org)
+ *
+ * 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 libavcodec/xbin.c
+ * Binary text decoder
+ * eXtended BINary text (XBIN) decoder
+ * iCEDraw File decoder
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "avcodec.h"
+#include "cga_data.h"
+#include "bintext.h"
+
+typedef struct XbinContext {
+ AVFrame frame;
+ int palette[16];
+ int flags;
+ int font_height;
+ const uint8_t *font;
+ int x, y;
+} XbinContext;
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+ XbinContext *s = avctx->priv_data;
+ uint8_t *p;
+ int i;
+
+ avctx->pix_fmt = PIX_FMT_PAL8;
+ s->frame.reference = 1;
+ if (avctx->get_buffer(avctx, &s->frame)) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+
+ p = avctx->extradata;
+ if (p) {
+ s->font_height = p[0];
+ s->flags = p[1];
+ p += 2;
+ } else {
+ s->font_height = 8;
+ s->flags = 0;
+ }
+
+ if ((s->flags & BINTEXT_PALETTE)) {
+ for (i = 0; i < 16; i++) {
+ s->palette[i] = 0xFF000000 | (AV_RB24(p) << 2);
+ p += 3;
+ }
+ } else {
+ for (i = 0; i < 16; i++)
+ s->palette[i] = 0xFF000000 | ff_cga_palette[i];
+ }
+
+ if ((s->flags & BINTEXT_FONT)) {
+ s->font = p;
+ } else {
+ switch(s->font_height) {
+ default:
+ av_log(avctx, AV_LOG_WARNING, "font height %i not support\n", s->font_height);
+ s->font_height = 8;
+ case 8:
+ s->font = ff_cga_font;
+ break;
+ case 16:
+ s->font = ff_vga16_font;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+#define DEFAULT_BG_COLOR 0
+static void hscroll(AVCodecContext *avctx)
+{
+ XbinContext *s = avctx->priv_data;
+ if (s->y < avctx->height - s->font_height) {
+ s->y += s->font_height;
+ } else {
+ memmove(s->frame.data[0], s->frame.data[0] + s->font_height*s->frame.linesize[0],
+ (avctx->height - s->font_height)*s->frame.linesize[0]);
+ memset(s->frame.data[0] + (avctx->height - s->font_height)*s->frame.linesize[0],
+ DEFAULT_BG_COLOR, s->font_height * s->frame.linesize[0]);
+ }
+}
+
+#define FONT_WIDTH 8
+
+/**
+ * Draw character to screen
+ */
+static void draw_char(AVCodecContext *avctx, int c, int a)
+{
+ XbinContext *s = avctx->priv_data;
+ if (s->y > avctx->height - s->font_height)
+ return;
+ ff_draw_pc_font(s->frame.data[0] + s->y * s->frame.linesize[0] + s->x,
+ s->frame.linesize[0], s->font, s->font_height, c,
+ a & 0x0F, a >> 4);
+ s->x += FONT_WIDTH;
+ if (s->x >= avctx->width) {
+ s->x = 0;
+ s->y += s->font_height;
+ }
+}
+
+static int decode_frame(AVCodecContext *avctx,
+ void *data, int *data_size,
+ AVPacket *avpkt)
+{
+ XbinContext *s = avctx->priv_data;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ const uint8_t *buf_end = buf+buf_size;
+
+ if (avctx->reget_buffer(avctx, &s->frame)) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
+ s->frame.pict_type = FF_I_TYPE;
+ s->frame.palette_has_changed = 1;
+ memcpy(s->frame.data[1], s->palette, 16 * 4);
+
+ if (avctx->codec_id == CODEC_ID_XBIN) {
+ while (buf + 2 < buf_end) {
+ int i,c,a;
+ int type = *buf >> 6;
+ int count = (*buf & 0x3F) + 1;
+ buf++;
+ switch (type) {
+ case 0: //no compression
+ for (i = 0; i < count && buf + 1 < buf_end; i++) {
+ draw_char(avctx, buf[0], buf[1]);
+ buf += 2;
+ }
+ break;
+ case 1: //character compression
+ c = *buf++;
+ for (i = 0; i < count && buf < buf_end; i++)
+ draw_char(avctx, c, *buf++);
+ break;
+ case 2: //attribute compression
+ a = *buf++;
+ for (i = 0; i < count && buf < buf_end; i++)
+ draw_char(avctx, *buf++, a);
+ break;
+ case 3: //character/attribute compression
+ c = *buf++;
+ a = *buf++;
+ for (i = 0; i < count && buf < buf_end; i++)
+ draw_char(avctx, c, a);
+ break;
+ }
+ }
+ } else if (avctx->codec_id == CODEC_ID_IDF) {
+ while (buf + 2 < buf_end) {
+ if (AV_RL16(buf) == 1) {
+ int i;
+ if (buf + 6 > buf_end)
+ break;
+ for (i = 0; i < buf[2]; i++)
+ draw_char(avctx, buf[4], buf[5]);
+ buf += 6;
+ } else {
+ draw_char(avctx, buf[0], buf[1]);
+ buf += 2;
+ }
+ }
+ } else {
+ while (buf + 1 < buf_end) {
+ draw_char(avctx, buf[0], buf[1]);
+ buf += 2;
+ }
+ }
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = s->frame;
+ return buf_size;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+ XbinContext *s = avctx->priv_data;
+
+ if (s->frame.data[0])
+ avctx->release_buffer(avctx, &s->frame);
+
+ return 0;
+}
+
+AVCodec ff_bintext_decoder = {
+ "xbin",
+ AVMEDIA_TYPE_VIDEO,
+ CODEC_ID_BINTEXT,
+ sizeof(XbinContext),
+ decode_init,
+ NULL,
+ decode_end,
+ decode_frame,
+ CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Binary text"),
+};
+
+AVCodec ff_xbin_decoder = {
+ "xbin",
+ AVMEDIA_TYPE_VIDEO,
+ CODEC_ID_XBIN,
+ sizeof(XbinContext),
+ decode_init,
+ NULL,
+ decode_end,
+ decode_frame,
+ CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text"),
+};
+
+AVCodec ff_idf_decoder = {
+ "idf",
+ AVMEDIA_TYPE_VIDEO,
+ CODEC_ID_IDF,
+ sizeof(XbinContext),
+ decode_init,
+ NULL,
+ decode_end,
+ decode_frame,
+ CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("iCEDraw text"),
+};
diff --git a/libavcodec/bintext.h b/libavcodec/bintext.h
new file mode 100644
index 0000000..ea834a0
--- /dev/null
+++ b/libavcodec/bintext.h
@@ -0,0 +1,37 @@
+/*
+ * Binary text decoder
+ * Copyright (c) 2010 Peter Ross (pross at xvid.org)
+ *
+ * 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
+ * Binary text decoder
+ */
+
+#ifndef AVCODEC_BINTEXT_H
+#define AVCODEC_BINTEXT_H
+
+/* flag values passed between avformat and avcodec;
+ * while these are identical to the XBIN flags, they are are also used
+ * for the BINTEXT and IDF decoders.
+ */
+#define BINTEXT_PALETTE 0x1
+#define BINTEXT_FONT 0x2
+
+#endif /* AVCODEC_BINTEXT_H */
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 3ba4b51..6353529 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -21,6 +21,7 @@ OBJS-$(CONFIG_A64_MUXER) += a64.o
OBJS-$(CONFIG_AAC_DEMUXER) += aacdec.o rawdec.o
OBJS-$(CONFIG_AC3_DEMUXER) += ac3dec.o rawdec.o
OBJS-$(CONFIG_AC3_MUXER) += rawenc.o
+OBJS-$(CONFIG_ADF_DEMUXER) += bintext.o sauce.o
OBJS-$(CONFIG_ADTS_MUXER) += adtsenc.o
OBJS-$(CONFIG_AEA_DEMUXER) += aea.o pcm.o
OBJS-$(CONFIG_AIFF_DEMUXER) += aiffdec.o riff.o pcm.o isom.o
@@ -46,6 +47,7 @@ OBJS-$(CONFIG_AVS_DEMUXER) += avs.o vocdec.o voc.o
OBJS-$(CONFIG_BETHSOFTVID_DEMUXER) += bethsoftvid.o
OBJS-$(CONFIG_BFI_DEMUXER) += bfi.o
OBJS-$(CONFIG_BINK_DEMUXER) += bink.o
+OBJS-$(CONFIG_BINTEXT_DEMUXER) += bintext.o sauce.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o vocdec.o voc.o
OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o riff.o isom.o
OBJS-$(CONFIG_CAF_MUXER) += cafenc.o caf.o riff.o isom.o
@@ -100,6 +102,7 @@ OBJS-$(CONFIG_H263_MUXER) += rawenc.o
OBJS-$(CONFIG_H264_DEMUXER) += h264dec.o rawdec.o
OBJS-$(CONFIG_H264_MUXER) += rawenc.o
OBJS-$(CONFIG_IDCIN_DEMUXER) += idcin.o
+OBJS-$(CONFIG_IDF_DEMUXER) += bintext.o
OBJS-$(CONFIG_IFF_DEMUXER) += iff.o
OBJS-$(CONFIG_IMAGE2_DEMUXER) += img2.o
OBJS-$(CONFIG_IMAGE2_MUXER) += img2.o
@@ -308,6 +311,7 @@ OBJS-$(CONFIG_WTV_DEMUXER) += wtvdec.o wtv.o asfdec.o asf.o asfcry
OBJS-$(CONFIG_WTV_MUXER) += wtvenc.o wtv.o asf.o riff.o
OBJS-$(CONFIG_WV_DEMUXER) += wv.o apetag.o
OBJS-$(CONFIG_XA_DEMUXER) += xa.o
+OBJS-$(CONFIG_XBIN_DEMUXER) += bintext.o sauce.o
OBJS-$(CONFIG_XMV_DEMUXER) += xmv.o
OBJS-$(CONFIG_XWMA_DEMUXER) += xwma.o riff.o
OBJS-$(CONFIG_YOP_DEMUXER) += yop.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 1f0ac51..e725b37 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -51,6 +51,7 @@ void av_register_all(void)
REGISTER_MUXER (A64, a64);
REGISTER_DEMUXER (AAC, aac);
REGISTER_MUXDEMUX (AC3, ac3);
+ REGISTER_DEMUXER (ADF, adf);
REGISTER_MUXER (ADTS, adts);
REGISTER_DEMUXER (AEA, aea);
REGISTER_MUXDEMUX (AIFF, aiff);
@@ -69,6 +70,7 @@ void av_register_all(void)
REGISTER_DEMUXER (AVS, avs);
REGISTER_DEMUXER (BETHSOFTVID, bethsoftvid);
REGISTER_DEMUXER (BFI, bfi);
+ REGISTER_DEMUXER (BINTEXT, bintext);
REGISTER_DEMUXER (BINK, bink);
REGISTER_DEMUXER (C93, c93);
REGISTER_MUXDEMUX (CAF, caf);
@@ -103,6 +105,7 @@ void av_register_all(void)
REGISTER_MUXDEMUX (H263, h263);
REGISTER_MUXDEMUX (H264, h264);
REGISTER_DEMUXER (IDCIN, idcin);
+ REGISTER_DEMUXER (IDF, idf);
REGISTER_DEMUXER (IFF, iff);
REGISTER_MUXDEMUX (IMAGE2, image2);
REGISTER_MUXDEMUX (IMAGE2PIPE, image2pipe);
@@ -229,6 +232,7 @@ void av_register_all(void)
REGISTER_MUXDEMUX (WTV, wtv);
REGISTER_DEMUXER (WV, wv);
REGISTER_DEMUXER (XA, xa);
+ REGISTER_DEMUXER (XBIN, xbin);
REGISTER_DEMUXER (XMV, xmv);
REGISTER_DEMUXER (XWMA, xwma);
REGISTER_DEMUXER (YOP, yop);
diff --git a/libavformat/bintext.c b/libavformat/bintext.c
new file mode 100644
index 0000000..904fd1f
--- /dev/null
+++ b/libavformat/bintext.c
@@ -0,0 +1,376 @@
+/*
+ * Binary text demuxer
+ * eXtended BINary text (XBIN) demuxer
+ * Artworx Data Format demuxer
+ * iCEDraw File demuxer
+ * Copyright (c) 2010 Peter Ross <pross at xvid.org>
+ *
+ * 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
+ * Binary text demuxer
+ * eXtended BINary text (XBIN) demuxer
+ * Artworx Data Format demuxer
+ * iCEDraw File demuxer
+ */
+
+#include "libavutil/intreadwrite.h"
+#include "avformat.h"
+#include "sauce.h"
+#include "libavcodec/bintext.h"
+
+#define LINE_RATE 6000 /** characters per second */
+
+typedef struct {
+ int chars_per_frame;
+ uint64_t fsize; /**< file size less metadata buffer */
+} BinDemuxContext;
+
+#if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER
+/**
+ * Given filesize and width, calculate height (assume font_height of 16)
+ */
+static void calculate_height(AVCodecContext *avctx, uint64_t fsize)
+{
+ avctx->height = (fsize / ((avctx->width>>3)*2)) << 4;
+}
+#endif
+
+#if CONFIG_BINTEXT_DEMUXER
+static const uint8_t next_magic[]={
+ 0x1A, 0x1B, '[', '0', ';', '3', '0', ';', '4', '0', 'm', 'N', 'E', 'X', 'T', 0x00
+};
+
+static int next_tag_read(AVFormatContext *avctx, uint64_t *fsize)
+{
+ ByteIOContext *pb = avctx->pb;
+ char buf[36];
+ int len;
+ uint64_t start_pos = url_fsize(pb) - 256;
+
+ url_fseek(pb, start_pos, SEEK_SET);
+ if (get_buffer(pb, buf, sizeof(next_magic)) != sizeof(next_magic))
+ return -1;
+ if (memcmp(buf, next_magic, sizeof(next_magic)))
+ return -1;
+ if (get_byte(pb) != 0x01)
+ return -1;
+
+ *fsize -= 256;
+
+#define GET_EFI2_META(name,size) \
+ len = get_byte(pb); \
+ if (len < 1 || len > size) \
+ return -1; \
+ if (get_buffer(pb, buf, size) == size && *buf) { \
+ buf[len] = 0; \
+ av_metadata_set2(&avctx->metadata, name, buf, 0); \
+ }
+
+ GET_EFI2_META("filename", 12)
+ GET_EFI2_META("author", 20)
+ GET_EFI2_META("publisher", 20)
+ GET_EFI2_META("title", 35)
+
+ return 0;
+}
+
+static void predict_width(AVCodecContext *avctx, uint64_t fsize, int got_width)
+{
+ /** attempt to guess width */
+ if (!got_width)
+ avctx->width = fsize > 4000 ? (160<<3) : (80<<3);
+}
+
+static AVStream * init_stream(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ BinDemuxContext *bin = s->priv_data;
+ AVStream *st = av_new_stream(s, 0);
+ if (!st)
+ return NULL;
+ st->codec->codec_tag = 0;
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+
+ if (!ap->time_base.num) {
+ av_set_pts_info(st, 60, 1, 25);
+ } else {
+ av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
+ }
+
+ /* simulate tty display speed */
+ bin->chars_per_frame = FFMAX(av_q2d(st->time_base) * (ap->sample_rate ? ap->sample_rate : LINE_RATE), 1);
+
+ st->codec->width = ap->width ? ap->width : (80<<3);
+ st->codec->height = ap->height ? ap->height : (25<<4);
+ return st;
+}
+
+static int bintext_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ BinDemuxContext *bin = s->priv_data;
+ ByteIOContext *pb = s->pb;
+
+ AVStream *st = init_stream(s, ap);
+ if (!st)
+ return AVERROR(ENOMEM);
+ st->codec->codec_id = CODEC_ID_BINTEXT;
+
+ st->codec->extradata_size = 2;
+ st->codec->extradata = av_malloc(st->codec->extradata_size);
+ if (!st->codec->extradata)
+ return AVERROR(ENOMEM);
+ st->codec->extradata[0] = 16;
+ st->codec->extradata[1] = 0;
+
+ if (!url_is_streamed(pb)) {
+ int got_width = 0;
+ bin->fsize = url_fsize(pb);
+ if (ff_sauce_read(s, &bin->fsize, &got_width, 0) < 0)
+ next_tag_read(s, &bin->fsize);
+ if (!ap->width)
+ predict_width(st->codec, bin->fsize, got_width);
+ if (!ap->height)
+ calculate_height(st->codec, bin->fsize);
+ url_fseek(pb, 0, SEEK_SET);
+ }
+ return 0;
+};
+#endif /* CONFIG_BINTEXT_DEMUXER */
+
+#if CONFIG_XBIN_DEMUXER
+static int xbin_probe(AVProbeData *p)
+{
+ const uint8_t *d = p->buf;
+
+ if (AV_RL32(d) == MKTAG('X','B','I','N') && d[4] == 0x1A &&
+ AV_RL16(d+5) > 0 && AV_RL16(d+5) <= 160 &&
+ d[9] > 0 && d[9] <= 32)
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+static int xbin_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ BinDemuxContext *bin = s->priv_data;
+ ByteIOContext *pb = s->pb;
+ char fontheight, flags;
+ uint8_t *h;
+
+ AVStream *st = init_stream(s, ap);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ url_fskip(pb, 5);
+ st->codec->width = get_le16(pb)<<3;
+ st->codec->height = get_le16(pb);
+ fontheight = get_byte(pb);
+ st->codec->height *= fontheight;
+ flags = get_byte(pb);
+
+ st->codec->extradata_size = 2;
+ if ((flags & BINTEXT_PALETTE))
+ st->codec->extradata_size += 48;
+ if ((flags & BINTEXT_FONT))
+ st->codec->extradata_size += fontheight * (flags & 0x10 ? 512 : 256);
+ st->codec->codec_id = flags & 4 ? CODEC_ID_XBIN : CODEC_ID_BINTEXT;
+
+ h = st->codec->extradata = av_malloc(st->codec->extradata_size);
+ if (!st->codec->extradata)
+ return AVERROR(ENOMEM);
+ st->codec->extradata[0] = fontheight;
+ st->codec->extradata[1] = flags;
+ if (get_buffer(pb, st->codec->extradata + 2, st->codec->extradata_size - 2) < 0)
+ return AVERROR(EIO);
+
+ if (!url_is_streamed(pb)) {
+ bin->fsize = url_fsize(pb) - 9 - st->codec->extradata_size;
+ ff_sauce_read(s, &bin->fsize, NULL, 0);
+ url_fseek(pb, 9 + st->codec->extradata_size, SEEK_SET);
+ }
+
+ return 0;
+}
+#endif /* CONFIG_XBIN_DEMUXER */
+
+#if CONFIG_ADF_DEMUXER
+static int adf_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ BinDemuxContext *bin = s->priv_data;
+ ByteIOContext *pb = s->pb;
+ AVStream *st;
+
+ if (get_byte(pb) != 1)
+ return AVERROR_INVALIDDATA;
+
+ st = init_stream(s, ap);
+ if (!st)
+ return AVERROR(ENOMEM);
+ st->codec->codec_id = CODEC_ID_BINTEXT;
+
+ st->codec->extradata_size = 2 + 48 + 4096;
+ st->codec->extradata = av_malloc(st->codec->extradata_size);
+ if (!st->codec->extradata)
+ return AVERROR(ENOMEM);
+ st->codec->extradata[0] = 16;
+ st->codec->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
+
+ if (get_buffer(pb, st->codec->extradata + 2, 24) < 0)
+ return AVERROR(EIO);
+ url_fskip(pb, 144);
+ if (get_buffer(pb, st->codec->extradata + 2 + 24, 24) < 0)
+ return AVERROR(EIO);
+ if (get_buffer(pb, st->codec->extradata + 2 + 48, 4096) < 0)
+ return AVERROR(EIO);
+
+ if (!url_is_streamed(pb)) {
+ int got_width = 0;
+ bin->fsize = url_fsize(pb) - 1 - 192 - 4096;
+ st->codec->width = 80<<3;
+ ff_sauce_read(s, &bin->fsize, &got_width, 0);
+ if (!ap->height)
+ calculate_height(st->codec, bin->fsize);
+ url_fseek(pb, 1 + 192 + 4096, SEEK_SET);
+ }
+ return 0;
+}
+#endif /* CONFIG_ADF_DEMUXER */
+
+#if CONFIG_IDF_DEMUXER
+static const uint8_t idf_magic[] = {
+ 0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00
+};
+
+static int idf_probe(AVProbeData *p)
+{
+ if (!memcmp(p->buf, idf_magic, FFMIN(sizeof(idf_magic), p->buf_size)))
+ return AVPROBE_SCORE_MAX;
+ return 0;
+}
+
+static int idf_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ BinDemuxContext *bin = s->priv_data;
+ ByteIOContext *pb = s->pb;
+ AVStream *st;
+ int got_width = 0;
+
+ if (url_is_streamed(pb))
+ return AVERROR(EIO);
+
+ st = init_stream(s, ap);
+ if (!st)
+ return AVERROR(ENOMEM);
+ st->codec->codec_id = CODEC_ID_IDF;
+
+ st->codec->extradata_size = 2 + 48 + 4096;
+ st->codec->extradata = av_malloc(st->codec->extradata_size);
+ if (!st->codec->extradata)
+ return AVERROR(ENOMEM);
+ st->codec->extradata[0] = 16;
+ st->codec->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
+
+ url_fseek(pb, url_fsize(pb) - 4096 - 48, SEEK_SET);
+
+ if (get_buffer(pb, st->codec->extradata + 2 + 48, 4096) < 0)
+ return AVERROR(EIO);
+ if (get_buffer(pb, st->codec->extradata + 2, 48) < 0)
+ return AVERROR(EIO);
+
+ bin->fsize = url_fsize(pb) - 12 - 4096 - 48;
+ ff_sauce_read(s, &bin->fsize, &got_width, 0);
+ if (!ap->height)
+ calculate_height(st->codec, bin->fsize);
+ url_fseek(pb, 12, SEEK_SET);
+ return 0;
+}
+#endif /* CONFIG_IDF_DEMUXER */
+
+static int read_packet(AVFormatContext *s,
+ AVPacket *pkt)
+{
+ BinDemuxContext *bin = s->priv_data;
+
+ if (bin->fsize > 0) {
+ if (av_get_packet(s->pb, pkt, bin->fsize) < 0)
+ return AVERROR(EIO);
+ bin->fsize = -1; /* done */
+ } else if (!bin->fsize) {
+ if (url_feof(s->pb))
+ return AVERROR(EIO);
+ if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0)
+ return AVERROR(EIO);
+ } else {
+ return AVERROR(EIO);
+ }
+
+ pkt->flags |= AV_PKT_FLAG_KEY;
+ return 0;
+}
+
+#if CONFIG_BINTEXT_DEMUXER
+AVInputFormat ff_bintext_demuxer = {
+ "bin",
+ NULL_IF_CONFIG_SMALL("Binary text"),
+ sizeof(BinDemuxContext),
+ NULL,
+ bintext_read_header,
+ read_packet,
+ .extensions = "bin",
+};
+#endif
+
+#if CONFIG_XBIN_DEMUXER
+AVInputFormat ff_xbin_demuxer = {
+ "xbin",
+ NULL_IF_CONFIG_SMALL("eXtended BINary text (XBIN)"),
+ sizeof(BinDemuxContext),
+ xbin_probe,
+ xbin_read_header,
+ read_packet,
+};
+#endif
+
+#if CONFIG_ADF_DEMUXER
+AVInputFormat ff_adf_demuxer = {
+ "adf",
+ NULL_IF_CONFIG_SMALL("Artworx Data Format"),
+ sizeof(BinDemuxContext),
+ NULL,
+ adf_read_header,
+ read_packet,
+ .extensions = "adf",
+};
+#endif
+
+#if CONFIG_IDF_DEMUXER
+AVInputFormat ff_idf_demuxer = {
+ "idf",
+ NULL_IF_CONFIG_SMALL("iCE Draw File"),
+ sizeof(BinDemuxContext),
+ idf_probe,
+ idf_read_header,
+ read_packet,
+ .extensions = "idf",
+};
+#endif
More information about the ffmpeg-cvslog
mailing list