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[GNUnet-SVN] r7280 - in Extractor: . src/plugins src/plugins/thumbnailff
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From: |
gnunet |
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Subject: |
[GNUnet-SVN] r7280 - in Extractor: . src/plugins src/plugins/thumbnailffmpeg |
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Date: |
Fri, 20 Jun 2008 06:45:27 -0600 (MDT) |
Author: holindho
Date: 2008-06-20 06:45:27 -0600 (Fri, 20 Jun 2008)
New Revision: 7280
Added:
Extractor/src/plugins/thumbnailffmpeg/
Extractor/src/plugins/thumbnailffmpeg/Makefile.am
Extractor/src/plugins/thumbnailffmpeg/README
Extractor/src/plugins/thumbnailffmpeg/thumbnailextractorffmpeg.c
Modified:
Extractor/configure.ac
Extractor/src/plugins/Makefile.am
Log:
add preliminary ffmpeg-based thumbnail extractor
Modified: Extractor/configure.ac
===================================================================
--- Extractor/configure.ac 2008-06-20 06:41:43 UTC (rev 7279)
+++ Extractor/configure.ac 2008-06-20 12:45:27 UTC (rev 7280)
@@ -477,6 +477,22 @@
printable=1])
AM_CONDITIONAL(HAVE_PRINTABLE, test x$printable != x0)
+ffmpeg_enabled=0
+AC_MSG_CHECKING([whether to enable the FFmpeg thumbnail extractor])
+AC_ARG_ENABLE(ffmpeg,
+ [AC_HELP_STRING([--enable-ffmpeg],[Enable FFmpeg support])
+ AC_HELP_STRING([--disable-ffmpeg],[Disable FFmpeg support])],
+ [case "$enableval" in
+ no) AC_MSG_RESULT(no)
+ ffmpeg_enabled=0
+ ;;
+ *) AC_MSG_RESULT(yes)
+ ffmpeg_enabled=1
+ ;;
+ esac],
+ [ AC_MSG_RESULT(no)
+ ffmpeg_enabled=0])
+AM_CONDITIONAL(HAVE_FFMPEG, test x$ffmpeg_enabled != x0)
AC_SUBST(CPPFLAGS)
AC_SUBST(LDFLAGS)
@@ -499,6 +515,7 @@
src/plugins/printable/Makefile
src/plugins/hash/Makefile
src/plugins/thumbnail/Makefile
+src/plugins/thumbnailffmpeg/Makefile
src/plugins/exiv2/Makefile
src/test/Makefile
])
@@ -506,6 +523,38 @@
LIBEXTRACTOR_VERSION="0.5.18a"
AX_CREATE_PKGCONFIG_INFO([libextractor.pc],,[-lextractor],[Metadata extraction
library],,)
+if test "x$ffmpeg_enabled" = "x1"
+then
+ AC_MSG_NOTICE([configuring FFmpeg])
+ cd src/plugins/thumbnailffmpeg/ffmpeg/
+ if ! ./configure \
+ --prefix=/tmp \
+ --disable-mmx \
+ --disable-altivec \
+ --enable-shared \
+ --enable-swscale \
+ --enable-gpl \
+ --disable-vhook \
+ --disable-postproc \
+ --disable-network \
+ --disable-ffmpeg \
+ --disable-ffserver \
+ --disable-ffplay \
+ --disable-devices \
+ --disable-protocols \
+ --disable-bsfs \
+ --disable-parsers \
+ --disable-muxers \
+ --disable-demuxers \
+ --disable-encoders \
+ --disable-decoders \
+ --enable-encoder=png \
+ --enable-decoder=png
+ then
+ AC_MSG_ERROR([FFmpeg configure failed.])
+ fi
+ cd ../../../../
+fi
AC_OUTPUT
@@ -534,8 +583,15 @@
AC_MSG_NOTICE([NOTICE: libgsf not found, no OLE2 (MS Office) support])
fi
-if test "x$without_gtk" = "xtrue" -a "x$qt" = "x0"
+if test "x$ffmpeg_enabled" = "x0"
then
+ AC_MSG_NOTICE([NOTICE: FFmpeg thumbnailer plugin disabled])
+else
+ AC_MSG_NOTICE([NOTICE: FFmpeg thumbnailer plugin enabled (security untested)])
+fi
+
+if test "x$without_gtk" = "xtrue" -a "x$qt" = "x0" -a "x$ffmpeg_enabled" = "x0"
+then
AC_MSG_NOTICE([NOTICE: neither gtk nor Qt not found, no thumbnail support])
fi
Modified: Extractor/src/plugins/Makefile.am
===================================================================
--- Extractor/src/plugins/Makefile.am 2008-06-20 06:41:43 UTC (rev 7279)
+++ Extractor/src/plugins/Makefile.am 2008-06-20 12:45:27 UTC (rev 7280)
@@ -2,6 +2,10 @@
LIBEXT = @LIBEXT@
+if HAVE_FFMPEG
+thumbffmpeg=thumbnailffmpeg
+endif
+
if HAVE_GLIB
if WITH_GSF
oledir=ole2
@@ -52,7 +56,7 @@
# toggle for development
# SUBDIRS = .
-SUBDIRS = $(thumbgtk) . $(oodir) $(printdir) hash $(oledir) rpm $(xpdfdir)
$(exiv2dir)
+SUBDIRS = $(thumbgtk) $(thumbffmpeg) . $(oodir) $(printdir) hash $(oledir) rpm
$(xpdfdir) $(exiv2dir)
if HAVE_VORBISFILE
@@ -390,13 +394,18 @@
mkdir -p $(DESTDIR)$(plugindir) &> /dev/null || true
rm -f $(DESTDIR)$(plugindir)/libextractor_thumbnail$(LIBEXT)
rm -f $(DESTDIR)$(plugindir)/libextractor_thumbnail.la
- if test "$(thumbgtk)" != ""; then \
- $(LN_S) $(plugindir)/libextractor_thumbnailgtk$(LIBEXT) \
+ if test "$(thumbffmpeg)" != ""; then \
+ $(LN_S) $(plugindir)/libextractor_thumbnailffmpeg$(LIBEXT) \
$(DESTDIR)$(plugindir)/libextractor_thumbnail$(LIBEXT);
\
else \
- if test "$(thumbqt)" != ""; then \
- $(LN_S) $(plugindir)/libextractor_thumbnailqt$(LIBEXT) \
+ if test "$(thumbgtk)" != ""; then \
+ $(LN_S) $(plugindir)/libextractor_thumbnailgtk$(LIBEXT)
\
$(DESTDIR)$(plugindir)/libextractor_thumbnail$(LIBEXT); \
- fi; \
- fi;
+ else \
+ if test "$(thumbqt)" != ""; then \
+ $(LN_S)
$(plugindir)/libextractor_thumbnailqt$(LIBEXT) \
+
$(DESTDIR)$(plugindir)/libextractor_thumbnail$(LIBEXT); \
+ fi \
+ fi \
+ fi
Added: Extractor/src/plugins/thumbnailffmpeg/Makefile.am
===================================================================
--- Extractor/src/plugins/thumbnailffmpeg/Makefile.am
(rev 0)
+++ Extractor/src/plugins/thumbnailffmpeg/Makefile.am 2008-06-20 12:45:27 UTC
(rev 7280)
@@ -0,0 +1,37 @@
+include ../Makefile-plugins.am
+
+plugin_LTLIBRARIES = \
+ libextractor_thumbnailffmpeg.la
+
+libextractor_thumbnailffmpeg_la_SOURCES = \
+ thumbnailextractorffmpeg.c
+libextractor_thumbnailffmpeg_la_LIBADD = \
+ $(top_builddir)/src/main/libextractor.la \
+ ./ffmpeg/libavformat/libavformat.a \
+ ./ffmpeg/libavcodec/libavcodec.a \
+ ./ffmpeg/libavutil/libavutil.a \
+ ./ffmpeg/libswscale/libswscale.a \
+ -lz -lbz2
+libextractor_thumbnailffmpeg_la_LDFLAGS = \
+ $(PLUGINFLAGS) $(retaincommand)
+libextractor_thumbnailffmpeg_la_CPPFLAGS = \
+ -I$(top_scrdir)/include \
+ -I./ffmpeg \
+ -I./ffmpeg/libavformat \
+ -I./ffmpeg/libavcodec \
+ -I./ffmpeg/libavutil \
+ -I./ffmpeg/libswscale
+
+./ffmpeg/libavformat/libavformat.a: Makefile
+ cd ffmpeg && $(MAKE) $(AM_MAKEFLAGS) all
+./ffmpeg/libavcodec/libavcodec.a: Makefile
+ cd ffmpeg && $(MAKE) $(AM_MAKEFLAGS) all
+./ffmpeg/libavutil/libavutil.a: Makefile
+ cd ffmpeg && $(MAKE) $(AM_MAKEFLAGS) all
+./ffmpeg/libswscale/libswscale.a: Makefile
+ cd ffmpeg && $(MAKE) $(AM_MAKEFLAGS) all
+
+clean-local:
+ cd ffmpeg && $(MAKE) $(AM_MAKEFLAGS) clean
+distclean-local:
+ cd ffmpeg && $(MAKE) $(AM_MAKEFLAGS) distclean
Added: Extractor/src/plugins/thumbnailffmpeg/README
===================================================================
--- Extractor/src/plugins/thumbnailffmpeg/README
(rev 0)
+++ Extractor/src/plugins/thumbnailffmpeg/README 2008-06-20 12:45:27 UTC
(rev 7280)
@@ -0,0 +1,72 @@
+This is a thumbnail extractor using the ffmpeg libraries that will eventually
+support extracting thumbnails from both image and video files.
+
+A local ffmpeg tree is used, because
+(1) there are no recent official releases of the ffmpeg libs,
+(2) mainline ffmpeg is not reentrant,
+(3) security issues can be handled locally.
+
+Plan: test & enable ffmpeg decoders one by one
+tests:
+- multithreading test
+- zzuf test
+- random input test
+
+At least, the following should be eventually enabled:
+if ! ./configure \
+ --prefix=/tmp/FF \
+ --disable-mmx \
+ --disable-altivec \
+ --enable-shared \
+ --enable-swscale \
+ --enable-gpl \
+ --disable-vhook \
+ --disable-postproc \
+ --disable-network \
+ --disable-ffmpeg \
+ --disable-ffserver \
+ --disable-ffplay \
+ --disable-devices \
+ --disable-protocols \
+ --disable-bsfs \
+ --disable-parsers \
+ --disable-muxers \
+ --disable-demuxers \
+ --disable-encoders \
+ --disable-decoders \
+ --enable-parser=h263 \
+ --enable-parser=h264 \
+ --enable-parser=mjpeg \
+ --enable-parser=mpeg4video \
+ --enable-parser=mpegvideo \
+ --enable-encoder=png \
+ --enable-encoder=mjpeg \
+ --enable-decoder=bmp \
+ --enable-decoder=pcx \
+ --enable-decoder=png \
+ --enable-decoder=mjpeg \
+ --enable-decoder=mjpegb \
+ --enable-decoder=targa \
+ --enable-decoder=tiff \
+ --enable-decoder=flashsv \
+ --enable-decoder=h263 \
+ --enable-decoder=flv \
+ --enable-decoder=h264 \
+ --enable-decoder=mpeg1video \
+ --enable-decoder=mpeg2video \
+ --enable-decoder=mpegvideo \
+ --enable-decoder=mpeg4 \
+ --enable-decoder=vp6 \
+ --enable-decoder=vp6a \
+ --enable-decoder=vp6f \
+ --enable-demuxer=asf \
+ --enable-demuxer=avi \
+ --enable-demuxer=flv \
+ --enable-demuxer=mjpeg \
+ --enable-demuxer=mpegps \
+ --enable-demuxer=mpegts \
+ --enable-demuxer=mpegvideo \
+ --enable-demuxer=mov \
+ --enable-demuxer=ogg \
+ --enable-demuxer=rm
+
Added: Extractor/src/plugins/thumbnailffmpeg/thumbnailextractorffmpeg.c
===================================================================
--- Extractor/src/plugins/thumbnailffmpeg/thumbnailextractorffmpeg.c
(rev 0)
+++ Extractor/src/plugins/thumbnailffmpeg/thumbnailextractorffmpeg.c
2008-06-20 12:45:27 UTC (rev 7280)
@@ -0,0 +1,524 @@
+/*
+ This file is part of libextractor.
+ Copyright (C) 2008 Heikki Lindholm
+
+ libextractor is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2, or (at your
+ option) any later version.
+
+ libextractor 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with libextractor; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * @file thumbnailextractorffmpeg.c
+ * @author Heikki Lindholm
+ * @brief this extractor produces a binary encoded
+ * thumbnail of images and videos using the ffmpeg libs.
+ */
+
+#include "platform.h"
+#include "extractor.h"
+
+#include <avformat.h>
+#include <avcodec.h>
+#include <swscale.h>
+
+#define DEBUG 1
+
+struct StreamDescriptor
+{
+ const uint8_t *data;
+ size_t offset;
+ size_t size;
+};
+
+
+void __attribute__ ((constructor)) ffmpeg_lib_init (void)
+{
+#if DEBUG
+ printf ("av_register_all()\n");
+#endif
+ av_register_all ();
+}
+
+static int
+stream_read (void *opaque, uint8_t * buf, int buf_size)
+{
+ struct StreamDescriptor *rs = (struct StreamDescriptor *) opaque;
+ size_t len;
+#if DEBUG
+ printf ("read_packet: %zu\n", buf_size);
+#endif
+ if (rs)
+ {
+ if (rs->data == NULL)
+ return -1;
+ if (rs->offset >= rs->size)
+ return 0;
+ len = buf_size;
+ if (rs->offset + len > rs->size)
+ len = rs->size - rs->offset;
+
+ memcpy (buf, rs->data + rs->offset, len);
+ rs->offset += len;
+#if DEBUG
+ printf ("read_packet: len: %zu\n", len);
+#endif
+ return len;
+ }
+ return -1;
+}
+
+static offset_t
+stream_seek (void *opaque, offset_t offset, int whence)
+{
+ struct StreamDescriptor *rs = (struct StreamDescriptor *) opaque;
+ offset_t off_abs;
+#if DEBUG
+ printf ("my_seek: %lld %d\n", offset, whence);
+#endif
+ if (rs)
+ {
+ if (whence == AVSEEK_SIZE)
+ return (offset_t) rs->size;
+ else if (whence == SEEK_CUR)
+ off_abs = (offset_t) rs->offset + offset;
+ else if (whence == SEEK_SET)
+ off_abs = offset;
+ else if (whence == SEEK_END)
+ off_abs = (offset_t) rs->size + offset;
+ else
+ {
+ printf ("whence error %d\n", whence);
+ abort ();
+ return AVERROR (EINVAL);
+ }
+ if (off_abs >= 0 && off_abs < (offset_t) rs->size)
+ rs->offset = (size_t) off_abs;
+ else
+ off_abs = AVERROR (EINVAL);
+ return off_abs;
+ }
+ return -1;
+}
+
+static EXTRACTOR_KeywordList *
+addKeyword (EXTRACTOR_KeywordType type,
+ char *keyword, EXTRACTOR_KeywordList * next)
+{
+ EXTRACTOR_KeywordList *result;
+
+ if (keyword == NULL)
+ return next;
+ result = malloc (sizeof (EXTRACTOR_KeywordList));
+ result->next = next;
+ result->keyword = keyword;
+ result->keywordType = type;
+ return result;
+}
+
+
+struct MimeToDecoderMapping
+{
+ const char *mime_type;
+ enum CodecID codec_id;
+};
+
+/* map mime image types to a decoder */
+static const struct MimeToDecoderMapping m2d_map[] = {
+ {"image/jpeg", CODEC_ID_MJPEG},
+ {"image/png", CODEC_ID_PNG},
+ {NULL, CODEC_ID_NONE}
+};
+
+#define PROBE_MAX (1<<20)
+#define BIOBUF_SIZE (64*1024)
+#define THUMBSIZE 128 /* max dimension in pixels */
+#define MAX_THUMB_SIZE (100*1024) /* in bytes */
+
+struct EXTRACTOR_Keywords *
+libextractor_thumbnailffmpeg_extract (const char *filename,
+ const unsigned char *data,
+ size_t size,
+ struct EXTRACTOR_Keywords *prev)
+{
+ int score;
+
+ AVInputFormat *fmt;
+ AVProbeData pdat;
+
+ ByteIOContext *bio_ctx = NULL;
+ uint8_t *bio_buffer;
+ struct StreamDescriptor reader_state;
+
+ AVFormatContext *format_ctx = NULL;
+ AVCodecContext *codec_ctx = NULL;
+ AVPacket packet;
+ int video_stream_index;
+ AVCodec *codec;
+ AVFrame *frame = NULL;
+ AVFrame *thumb_frame = NULL;
+ int64_t ts;
+
+ struct SwsContext *scaler_ctx;
+ int sws_flags = SWS_BICUBIC;
+ uint8_t *thumb_buffer;
+ int thumb_width, thumb_height;
+ int sar_num, sar_den;
+
+ FILE *output = NULL;
+ uint8_t *encoder_output_buffer;
+ size_t encoder_output_buffer_size;
+ AVCodecContext *enc_codec_ctx;
+ AVCodec *enc_codec;
+
+ int i;
+ int err;
+ int frame_finished;
+
+ char *binary;
+ const char *mime;
+ int is_image;
+ enum CodecID image_codec_id;
+
+ bio_ctx = NULL;
+ bio_buffer = NULL;
+ format_ctx = NULL;
+ codec = NULL;
+ frame = NULL;
+ thumb_frame = NULL;
+ thumb_buffer = NULL;
+ scaler_ctx = NULL;
+ encoder_output_buffer = NULL;
+ enc_codec = NULL;
+ enc_codec_ctx = NULL;
+
+ is_image = 0;
+
+ mime = EXTRACTOR_extractLast (EXTRACTOR_MIMETYPE, prev);
+ if (mime != NULL)
+ {
+ i = 0;
+ while (m2d_map[i].mime_type != NULL)
+ {
+ if (!strcmp (m2d_map[i].mime_type, mime))
+ {
+ is_image = 1;
+ image_codec_id = m2d_map[i].codec_id;
+ break;
+ }
+ i++;
+ }
+ }
+
+#if DEBUG
+ printf ("is_image: %d codec:%d\n", is_image, image_codec_id);
+#endif
+ if (!is_image)
+ {
+ pdat.filename = filename;
+ pdat.buf = (unsigned char *) data;
+ pdat.buf_size = (size > PROBE_MAX) ? PROBE_MAX : size;
+
+ fmt = av_probe_input_format (&pdat, 1);
+ if (fmt == NULL)
+ return prev;
+#if DEBUG
+ printf ("format %p [%s] [%s]\n", fmt, fmt->name, fmt->long_name);
+#endif
+ pdat.buf = (unsigned char *) data;
+ pdat.buf_size = size > PROBE_MAX ? PROBE_MAX : size;
+ score = fmt->read_probe (&pdat);
+#if DEBUG
+ printf ("score: %d\n", score);
+#endif
+ /*if (score < 50) return prev; */
+ }
+
+ if (is_image)
+ {
+ codec_ctx = avcodec_alloc_context ();
+ codec = avcodec_find_decoder (image_codec_id);
+ if (codec != NULL)
+ {
+ if (avcodec_open (codec_ctx, codec) != 0)
+ {
+#if DEBUG
+ printf ("open codec failed\n");
+#endif
+ codec = NULL;
+ }
+ }
+ }
+ else
+ {
+ bio_ctx = malloc (sizeof (ByteIOContext));
+ bio_buffer = malloc (BIOBUF_SIZE);
+
+ reader_state.data = data;
+ reader_state.offset = 0;
+ reader_state.size = size;
+
+ init_put_byte (bio_ctx, bio_buffer,
+ BIOBUF_SIZE, 0, &reader_state,
+ stream_read, NULL, stream_seek);
+
+ fmt->flags |= AVFMT_NOFILE;
+ err = av_open_input_stream (&format_ctx, bio_ctx, "", fmt, NULL);
+ if (err < 0)
+ {
+#if DEBUG
+ printf ("couldn't open input stream\n");
+#endif
+ goto out;
+ }
+
+ err = av_find_stream_info (format_ctx);
+ if (err < 0)
+ {
+#if DEBUG
+ printf ("couldn't find codec params\n");
+#endif
+ goto out;
+ }
+
+ for (i = 0; i < format_ctx->nb_streams; i++)
+ {
+ codec_ctx = format_ctx->streams[i]->codec;
+ if (codec_ctx->codec_type == CODEC_TYPE_VIDEO)
+ {
+ video_stream_index = i;
+ codec = avcodec_find_decoder (codec_ctx->codec_id);
+ if (codec == NULL)
+ {
+#if DEBUG
+ printf ("find_decoder failed\n");
+#endif
+ break;
+ }
+ err = avcodec_open (codec_ctx, codec);
+ if (err != 0)
+ {
+#if DEBUG
+ printf ("failed to open codec\n");
+#endif
+ codec = NULL;
+ }
+ break;
+ }
+ }
+ }
+
+ if (codec_ctx == NULL || codec == NULL)
+ {
+#if DEBUG
+ printf ("failed to open codec");
+#endif
+ goto out;
+ }
+ frame = avcodec_alloc_frame ();
+ if (frame == NULL)
+ {
+#if DEBUG
+ printf ("failed to alloc frame");
+#endif
+ goto out;
+ }
+
+ if (!is_image)
+ {
+#if DEBUG
+ printf ("duration: %lld\n", format_ctx->duration);
+ if (format_ctx->duration == AV_NOPTS_VALUE)
+ printf ("duration unknown\n");
+#endif
+ /* TODO: if duration is known seek to to some better place(?) */
+ ts = 10; // s
+ ts = ts * AV_TIME_BASE;
+ err = av_seek_frame (format_ctx, -1, ts, 0);
+ if (err >= 0)
+ {
+ avcodec_flush_buffers (codec_ctx);
+ }
+#if DEBUG
+ else
+ printf ("seeking failed %d\n", err);
+#endif
+ }
+
+ frame_finished = 0;
+ if (is_image)
+ {
+ avcodec_decode_video (codec_ctx, frame, &frame_finished, data, size);
+ }
+ else
+ {
+ while (1)
+ {
+ err = av_read_frame (format_ctx, &packet);
+ if (err < 0)
+ break;
+ if (packet.stream_index == video_stream_index)
+ {
+ avcodec_decode_video (codec_ctx,
+ frame,
+ &frame_finished,
+ packet.data, packet.size);
+ if (frame_finished && frame->key_frame)
+ {
+ av_free_packet (&packet);
+ break;
+ }
+ }
+ av_free_packet (&packet);
+ }
+ }
+
+ if (!frame_finished)
+ goto out;
+
+ sar_num = codec_ctx->sample_aspect_ratio.num;
+ sar_den = codec_ctx->sample_aspect_ratio.den;
+ if (sar_num <= 0 || sar_den <= 0)
+ {
+ sar_num = 1;
+ sar_den = 1;
+ }
+ if ((codec_ctx->width * sar_num) / sar_den > codec_ctx->height)
+ {
+ thumb_width = THUMBSIZE;
+ thumb_height = (thumb_width * codec_ctx->height) /
+ ((codec_ctx->width * sar_num) / sar_den);
+ }
+ else
+ {
+ thumb_height = THUMBSIZE;
+ thumb_width = (thumb_height *
+ ((codec_ctx->width * sar_num) / sar_den)) /
+ codec_ctx->height;
+ }
+ if (thumb_width < 8)
+ thumb_width = 8;
+ if (thumb_height < 1)
+ thumb_height = 1;
+#if DEBUG
+ printf ("thumb dim: %d %d\n", thumb_width, thumb_height);
+#endif
+
+ scaler_ctx =
+ sws_getContext (codec_ctx->width, codec_ctx->height, codec_ctx->pix_fmt,
+ thumb_width, thumb_height, PIX_FMT_RGB24, sws_flags, NULL,
+ NULL, NULL);
+ if (scaler_ctx == NULL)
+ {
+#if DEBUG
+ printf ("failed to alloc scaler\n");
+#endif
+ goto out;
+ }
+ thumb_frame = avcodec_alloc_frame ();
+ thumb_buffer =
+ av_malloc (avpicture_get_size (PIX_FMT_RGB24, thumb_width, thumb_height));
+ if (thumb_frame == NULL || thumb_buffer == NULL)
+ {
+#if DEBUG
+ printf ("failed to alloc thumb frame\n");
+#endif
+ goto out;
+ }
+ avpicture_fill ((AVPicture *) thumb_frame, thumb_buffer,
+ PIX_FMT_RGB24, thumb_width, thumb_height);
+
+ sws_scale (scaler_ctx,
+ frame->data, frame->linesize,
+ 0, codec_ctx->height, thumb_frame->data, thumb_frame->linesize);
+
+ encoder_output_buffer_size = MAX_THUMB_SIZE;
+ encoder_output_buffer = av_malloc (encoder_output_buffer_size);
+ if (encoder_output_buffer == NULL)
+ {
+#if DEBUG
+ printf ("couldn't alloc encoder output buf\n");
+#endif
+ goto out;
+ }
+
+ enc_codec = avcodec_find_encoder_by_name ("png");
+ if (enc_codec == NULL)
+ {
+#if DEBUG
+ printf ("couldn't find encoder\n");
+#endif
+ goto out;
+ }
+ enc_codec_ctx = avcodec_alloc_context ();
+ enc_codec_ctx->width = thumb_width;
+ enc_codec_ctx->height = thumb_height;
+ enc_codec_ctx->pix_fmt = PIX_FMT_RGB24;
+
+ if (avcodec_open (enc_codec_ctx, enc_codec) < 0)
+ {
+#if DEBUG
+ printf ("couldn't open encoder\n");
+#endif
+ enc_codec = NULL;
+ goto out;
+ }
+
+ err = avcodec_encode_video (enc_codec_ctx,
+ encoder_output_buffer,
+ encoder_output_buffer_size, thumb_frame);
+ if (err <= 0)
+ goto out;
+
+ binary =
+ EXTRACTOR_binaryEncode ((const unsigned char *) encoder_output_buffer,
+ err);
+ if (binary != NULL)
+ prev = addKeyword (EXTRACTOR_THUMBNAIL_DATA, binary, prev);
+
+out:
+ if (enc_codec != NULL)
+ avcodec_close (enc_codec_ctx);
+ if (enc_codec_ctx != NULL)
+ av_free (enc_codec_ctx);
+ if (encoder_output_buffer != NULL)
+ av_free (encoder_output_buffer);
+ if (codec != NULL)
+ avcodec_close (codec_ctx);
+ if (format_ctx != NULL)
+ av_close_input_file (format_ctx);
+ if (frame != NULL)
+ av_free (frame);
+ if (thumb_buffer != NULL)
+ av_free (thumb_buffer);
+ if (thumb_frame != NULL)
+ av_free (thumb_frame);
+ if (bio_ctx != NULL)
+ free (bio_ctx);
+ if (bio_buffer != NULL)
+ free (bio_buffer);
+
+ return prev;
+}
+
+struct EXTRACTOR_Keywords *
+libextractor_thumbnail_extract (const char *filename,
+ const unsigned char *data,
+ size_t size,
+ struct EXTRACTOR_Keywords *prev,
+ const char *options)
+{
+ return libextractor_thumbnailffmpeg_extract (filename, data, size, prev);
+}
+
+/* end of thumbnailextractorffmpeg.c */
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