first step to build against an external libmpeg2

This at the moment fully unsupported. The lossless MPEG2 transcoder
depends on an internal libmpeg2 header to copy the quantizer matrix.

git-svn-id: http://svn.mythtv.org/svn/trunk@25461 7dbf422c-18fa-0310-86e9-fd20926502f2

Author: jannau

mythtv/configure

@@ -1290,6 +1290,7 @@ MYTHTV_CONFIG_LIST='
     ivtv
     joystick_menu
     libfftw3
+    libmpeg2external
     lirc
     mheg
     opengl_video
@@ -1338,6 +1339,7 @@ USING_LIST='
     bindings_python
     darwin_da
     dvdv
+    mythtranscode
     opengl
     vdpau
 '
@@ -1673,6 +1675,7 @@ ivtv_deps="backend v4l"
 hdpvr_deps="backend v4l"
 hdhomerun_deps="backend"
 mpegtsraw_demuxer_deps="merge_libavformat_mpegts_c"
+mythtranscode="backend frontend"
 opengl_deps_any="agl_h GL_gl_h darwin windows x11"
 opengl_video_deps="opengl"
 opengl_vsync_deps="opengl"
@@ -2903,6 +2906,7 @@ EOF
         disable dv1394
         disable dvb
         enable  memalign_hack
+        disable mythtranscode
         disable network
         enable opengl
         if enabled wince; then
@@ -3487,6 +3491,14 @@ enabled libx264    && require  libx264 x264.h x264_encoder_encode -lx264 -lm &&
 enabled libxvid    && require  libxvid xvid.h xvid_global -lxvidcore
 enabled mlib       && require  mediaLib mlib_types.h mlib_VectorSub_S16_U8_Mod -lmlib
 
+if enabled libmpeg2external; then
+    check_lib mpeg2dec/mpeg2.h mpeg2_init -lmpeg2 || disable libmpeg2external
+    if disabled libmpeg2external; then
+        die "Warning! No suiteable external libmpeg2 found, use internal copy."
+    fi
+    disable mythtranscode
+fi
+
 # libdc1394 check
 if enabled libdc1394; then
     { check_lib dc1394/dc1394.h dc1394_new -ldc1394 -lraw1394 &&

mythtv/libs/libmythtv/avformatdecoder.cpp

@@ -56,7 +56,11 @@ extern "C" {
 extern const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
 #include "avio.h"
 #include "libswscale/swscale.h"
+#if CONFIG_LIBMPEG2EXTERNAL
+#include <mpeg2dec/mpeg2.h>
+#else
 #include "../libmythmpeg2/mpeg2.h"
+#endif
 #include "ivtv_myth.h"
 }
 
@@ -392,7 +396,11 @@ int AvFormatDecoderPrivate::DecodeMPEG2Video(AVCodecContext *avctx,
                               PIC_FLAG_PROGRESSIVE_FRAME);
                         frm->repeat_pict =
                             !!(info->display_picture->flags &
+#if CONFIG_LIBMPEG2EXTERNAL
+                               PIC_FLAG_REPEAT_FIRST_FIELD);
+#else
                                PIC_FLAG_REPEAT_FIELD);
+#endif
                         partialFrames.enqueue(frm);
 
                     }

mythtv/libs/libmythtv/libmythtv.pro

@@ -21,7 +21,7 @@ contains(INCLUDEPATH, /usr/local/include) {
 
 DEPENDPATH  += .
 DEPENDPATH  += ../libmyth ../libavcodec ../libavformat ../libavutil ../libswscale
-DEPENDPATH  += ../libmythmpeg2 ../libmythdb ../libmythhdhomerun
+DEPENDPATH  += ../libmythdb ../libmythhdhomerun
 DEPENDPATH  += ../libmythdvdnav/
 DEPENDPATH  += ../libmythbluray/
 DEPENDPATH  += ./dvbdev ./mpeg ./iptv ./channelscan
@@ -42,25 +42,30 @@ INCLUDEPATH += $$POSTINC
 LIBS += -L../libmyth -L../libavutil -L../libavcodec -L../libavformat
 LIBS += -L../libswscale
 LIBS += -L../libmythui -L../libmythupnp
-LIBS += -L../libmythmpeg2 -L../libmythdvdnav -L../libmythbluray
+LIBS += -L../libmythdvdnav
+LIBS += -L../libmythbluray
 LIBS += -L../libmythdb
 LIBS += -lmyth-$$LIBVERSION         -lmythavutil-$$LIBVERSION
 LIBS += -lmythavcodec-$$LIBVERSION  -lmythavformat-$$LIBVERSION
 LIBS += -lmythswscale-$$LIBVERSION
 LIBS += -lmythui-$$LIBVERSION       -lmythupnp-$$LIBVERSION
-LIBS += -lmythmpeg2-$$LIBVERSION    -lmythdvdnav-$$LIBVERSION
+LIBS += -lmythdvdnav-$$LIBVERSION
 LIBS += -lmythbluray-$$LIBVERSION    -lmythdb-$$LIBVERSION
 using_mheg: LIBS += -L../libmythfreemheg -lmythfreemheg-$$LIBVERSION
 using_live: LIBS += -L../libmythlivemedia -lmythlivemedia-$$LIBVERSION
 using_hdhomerun: LIBS += -L../libmythhdhomerun -lmythhdhomerun-$$LIBVERSION
 using_backend: LIBS += -lmp3lame
 LIBS += $$EXTRA_LIBS $$QMAKE_LIBS_DYNLOAD
+!contains( CONFIG_LIBMPEG2EXTERNAL, yes) {
+        DEPENDPATH  += ../libmythmpeg2
+        LIBS += -L../libmythmpeg2 -lmythmpeg2-$$LIBVERSION
+        TARGETDEPS += ../libmythmpeg2/libmythmpeg2-$${MYTH_LIB_EXT}
+}
 
 TARGETDEPS += ../libmyth/libmyth-$${MYTH_SHLIB_EXT}
 TARGETDEPS += ../libavutil/libmythavutil-$${MYTH_SHLIB_EXT}
 TARGETDEPS += ../libavcodec/libmythavcodec-$${MYTH_SHLIB_EXT}
 TARGETDEPS += ../libavformat/libmythavformat-$${MYTH_SHLIB_EXT}
-TARGETDEPS += ../libmythmpeg2/libmythmpeg2-$${MYTH_LIB_EXT}
 TARGETDEPS += ../libmythdvdnav/libmythdvdnav-$${MYTH_LIB_EXT}
 TARGETDEPS += ../libmythbluray/libmythbluray-$${MYTH_LIB_EXT}
 using_mheg: TARGETDEPS += ../libmythfreemheg/libmythfreemheg-$${MYTH_SHLIB_EXT}

mythtv/libs/libs.pro

@@ -4,13 +4,14 @@ TEMPLATE = subdirs
 
 # Libraries without dependencies
 SUBDIRS += libavutil libmythsamplerate
-SUBDIRS += libmythsoundtouch libmythmpeg2 libmythdvdnav
+SUBDIRS += libmythsoundtouch libmythdvdnav
 SUBDIRS += libmythbluray libmythfreesurround libmythdb
 
 using_mheg:SUBDIRS += libmythfreemheg
 using_live:SUBDIRS += libmythlivemedia
 using_hdhomerun:SUBDIRS += libmythhdhomerun
 using_x11:SUBDIRS += libmythnvctrl
+!contains( CONFIG_LIBMPEG2EXTERNAL, yes):SUBDIRS += libmythmpeg2
 
 # Libraries with dependencies
 SUBDIRS += libmythui libmyth libmythupnp libmythtv libavcodec libavformat libswscale

mythtv/programs/mythtranscode/mpeg2fix.h

@@ -15,7 +15,12 @@ extern "C"
 #include "replex/multiplex.h"
 
 //libmpeg2
+#include "config.h"
+#if CONFIG_LIBMPEG2EXTERNAL
+#include <mpeg2dec/mpeg2.h>
+#else
 #include "mpeg2.h"
+#endif
 }
 
 //Qt

mythtv/programs/mythtranscode/mythtranscode.pro

@@ -19,5 +19,11 @@ HEADERS += replex/element.h replex/mpg_common.h replex/multiplex.h \
            replex/pes.h     replex/ringbuffer.h replex/ts.h
 
 INCLUDEPATH += replex
-INCLUDEPATH += ../../libs/libavcodec ../../libs/libavformat \
-               ../../libs/libavutil  ../../libs/ ../../libs/libmythmpeg2
+INCLUDEPATH += ../../libs/libavcodec
+INCLUDEPATH += ../../libs/libavformat
+INCLUDEPATH += ../../libs/libavutil
+INCLUDEPATH += ../../libs/
+
+!contains( CONFIG_LIBMPEG2EXTERNAL, yes) {
+        INCLUDEPATH += ../../libs/libmythmpeg2
+}

mythtv/programs/programs.pro

@@ -6,16 +6,13 @@ TEMPLATE = subdirs
 using_frontend {
     SUBDIRS += mythavtest mythfrontend mythcommflag
     SUBDIRS += mythtvosd mythjobqueue mythlcdserver
-    SUBDIRS += mythwelcome mythshutdown mythtranscode/replex
+    SUBDIRS += mythwelcome mythshutdown
     SUBDIRS += mythpreviewgen
+    !mingw: SUBDIRS += mythtranscode/replex
 }
 
 using_backend {
     SUBDIRS += mythbackend mythfilldatabase mythtv-setup scripts
 }
 
-using_frontend:using_backend {
-    SUBDIRS += mythtranscode
-}
-
-mingw: SUBDIRS -= mythtranscode mythtranscode/replex
+using_mythtranscode: SUBDIRS += mythtranscode