FFmpeg Transplant Android

Recent projects need to parse Apple's HLS streaming protocol, and FFmpeg has added support for HLS protocols since the 0.11.1 "happiness" version. There are many articles on the internet about ffmpeg compiling and porting, but most of them are descriptions of the old versions. The new version of the source code has made changes to many places, including some variable names, constant names, function names, function parameters, structure, etc., so in the old version of the JNI interface, you need to make corresponding changes. This compilation porting work really took me a lot of time, now summed up, I hope to give you some help. Note that this article is not necessarily correct, everyone in the compilation process, will inevitably encounter a variety of errors, can be proposed to discuss together.

Compilation environment: Ubuntu 12.04, Android NDK R8

First, download the source code, new project

: http://ffmpeg.org/download.html, download the latest ffmpeg-0.11.1 compression pack.

Under the $ndk_home/samples/directory (mine is/root/develop/android-ndk-r8/samples/ Create a FFMPEG-0.11 directory, in which a new JNI directory, and then the FFmpeg source decompression in the JNI, the source folder renamed to Libffmpeg, so the final source of the path is:

/root/develop/android-ndk-r8/samples/ffmpeg-0.11/jni/libffmpeg

Second, configure the source code

1. Create a config_common.sh script

Create a config_common.sh in the JNI directory with the following content:

Shellscript Code

2. #!/bin/bash
6. Ffconfig_common= '
8. --enable-version3
10. --disable-gpl
12. --disable-nonfree
14. --disable-debug
16. --disable-ffmpeg
18. --disable-ffplay
20. --disable-ffserver
22. --disable-ffprobe
24. --disable-encoders
26. --disable-muxers
28. --disable-devices
30. --disable-protocols
32. --enable-protocol=file
34. --disable-swscale
36. --disable-avfilter
38. --enable-network
40. --disable-avdevice
42. --enable-parsers
44. --disable-decoders
46. --disable-demuxers
48. --enable-demuxer=matroska
50. --disable-demuxer=rm
52. --disable-demuxer=avi
54. --disable-demuxer=flv
56. --disable-demuxer=mov
58. --enable-demuxer=mp3
60. --enable-demuxer=mpegps
62. --enable-demuxer=mpegvideo
64. --enable-demuxer=asf
66. --enable-decoder=aac
68. --enable-decoder=ac3
70. --enable-decoder=dca
72. --enable-decoder=flv
74. --disable-decoder=h263
76. --disable-decoder=h264
78. --enable-decoder=svq3
80. --enable-decoder=amrnb
82. --enable-decoder=nellymoser
84. --enable-decoder=pcm_alaw
86. --enable-decoder=pcm_dvd
88. --enable-decoder=pcm_mulaw
90. --enable-decoder=pcm_s16be
92. --enable-decoder=pcm_s16le
94. --enable-decoder=pcm_s16le_planar
96. --enable-decoder=pcm_s24be
98. --enable-decoder=pcm_s24daud
100. --enable-decoder=pcm_s24le
102. --enable-decoder=pcm_s32be
104. --enable-decoder=pcm_s32le
106. --enable-decoder=pcm_s8
108. --enable-decoder=pcm_u16be
110. --enable-decoder=pcm_u16le
112. --enable-decoder=pcm_u24be
114. --enable-decoder=pcm_u24le
116. --enable-decoder=pcm_u32be
118. --enable-decoder=pcm_u32le
120. --enable-decoder=atrac3
122. --enable-decoder=pcm_u8
124. --enable-decoder=sipr
126. --enable-decoder=mjpeg
128. --enable-decoder=mp1
130. --enable-decoder=mp2
132. --enable-decoder=mp3
134. --enable-decoder=tscc
136. --enable-decoder=mpeg1video
138. --enable-decoder=mpeg2video
140. --enable-decoder=mpeg4
142. --enable-decoder=ra_144
144. --enable-decoder=ra_288
146. --enable-decoder=cook
148. --enable-decoder=rv10
150. --enable-decoder=rv20
152. --enable-decoder=rv30
154. --enable-decoder=rv40
156. --enable-decoder=wmav1
158. --enable-decoder=wmav2
160. --enable-decoder=wmapro
162. --disable-decoder=wmv1
164. --disable-decoder=wmv2
166. --disable-decoder=wmv3
168. --enable-decoder=vc1
170. --enable-decoder=msmpeg4v1
172. --enable-decoder=msmpeg4v2
174. --enable-decoder=msmpeg4v3
176. ‘

You can configure the above parameters yourself as needed.

2. Create a config.sh script

Create a config.sh in the JNI directory with the following content:

Shellscript Code

2. #!/bin/bash
6. SOURCE config_common.sh/* Execute the above config_common.sh script here */
10. CD libffmpeg/* Enter the LIBFFMPEG directory */
14. prebuilt=/root/develop/android-ndk-r8/toolchains/arm-linux-androideabi-4.4. 3/prebuilt/linux-x86
16. platform=/root/develop/android-ndk-r8/platforms/android-14/arch-arm
20. ./configure--target-os=linux \
22. --arch=arm \
24. --enable-shared \
26. --enable-cross-compile \
28. --cc= $PREBUILT/BIN/ARM-LINUX-ANDROIDEABI-GCC \
30. --cross-prefix= $PREBUILT/bin/arm-linux-androideabi-\
32. --strip= $PREBUILT/bin/arm-linux-androideabi-strip \
34. --extra-cflags="-fpic-dandroid" \
36. --extra-ldflags="-wl,-t, $PREBUILT/arm-linux-androideabi/lib/ldscripts/armelf_linux_eabi.x-wl,-rpath-link=$ Platform/usr/lib-l$platform/usr/lib-nostdlib $PREBUILT/LIB/GCC/ARM-LINUX-ANDROIDEABI/4.4.3/CRTBEGIN.O $PREBUILT/ Lib/gcc/arm-linux-androideabi/4.4.3/crtend.o-lc-lm-ldl "\
38. $FFCONFIG _common
44. Cd.. /* Return to JNI directory */
46. Ndk-build Clean

3. Execute the config.sh script

Then open the terminal and execute the following command:

$chmod +x config.sh/* Give config.sh Execute permission */
$./config.sh

If configured correctly, the last two lines shown are:

LICENSE:LGPL version 3 or later
Creating Config.mak and Config.h ...

If Warning:/root/develop/android-ndk-8/.............../arm-linux-androideabi-pkg-config not found appears, the library Detection may fail. can be ignored.

4. Modify Config.h

Enter the jni/libffmpeg/directory and find this sentence in the newly generated config.h:

#define Restrict Restrict

Because the Android GCC does not recognize the Restrict keyword, it is rewritten as:

#define Restrict

If you need to be networked, you also need to set the following definition in Config.h to 1:

#define Config_network 1
#define CONFIG_HTTP_PROTOCOL 1
#define CONFIG_HTTPPROXY_PROTOCOL 1
#define CONFIG_HTTPS_PROTOCOL 1
#define CONFIG_TCP_PROTOCOL 1
#define CONFIG_UDP_PROTOCOL 1
#define HAVE_STRUCT_SOCKADDR_STORAGE 1
#define HAVE_STRUCT_ADDRINFO 1
#define HAVE_SOCKLEN_T 1

#define Have_inet_aton 0

Accordingly, the Config.mak also needs to be modified to:

Config_network=yes
Config_http_protocol=yes
Config_httpproxy_protocol=yes
Config_https_protocol=yes
Config_tcp_protocol=yes
Config_udp_protocol=yes
Have_struct_sockaddr_storage=yes
Have_struct_addrinfo=yes
Have_socklen_t=yes

! Have_inet_aton=yes

5. Modify the Libm.h file

All of the static functions in the/libavutil/libm.h are commented out.

6. Modify the Makefile file

Modify the Libpostproc file in the Libavcodec, Libavfilter, Libavformat, Libavutil, Libswscale, and makefile directories and comment out the following sentence:

Include $ (subdir): /config.mak

7. Create a new AV.MK script

Under/jni/libffmpeg, create a script file av.mk with the following content:

# Local_path is one of Libavutil, Libavcodec, Libavformat, or Libswscale

#include $ (Local_path)/.. /config-$ (target_arch). Mak
Include $ (local_path)/. /config.mak

OBJS: =
Objs-yes: =
Mmx-objs-yes: =
Include $ (local_path)/makefile
Ifdef addition_inc
Include $ (addition_inc)
endif

# Collect objects
objs-$ (HAVE_MMX) + = $ (mmx-objs-yes)
OBJS + = $ (objs-yes)

Ffname: = lib$ (NAME)
Fflibs: = $ (foreach,name,$ (fflibs), lib$ (NAME))
Ffcflags =-dhave_av_config_h $ (CFLAGS)
Ffcflags + =-dtarget_config=\ "config-$ (target_arch). H\"

All_s_files: = $ (wildcard $ (local_path)/$ (target_arch)/*. S
All_s_files: = $ (Addprefix $ (target_arch)/, $ (Notdir $ (all_s_files)))

Ifneq ($ (all_s_files),)
ALL_S_OBJS: = $ (patsubst%). s,%.o,$ (All_s_files))
C_OBJS: = $ (Filter-out $ (ALL_S_OBJS), $ (OBJS))
S_OBJS: = $ (Filter $ (ALL_S_OBJS), $ (OBJS))
Else
C_OBJS: = $ (OBJS)
S_OBJS: =
endif

C_files: = $ (Patsubst%.o,%.c,$ (C_OBJS))
S_files: = $ (Patsubst%.o,%. s,$ (S_OBJS))

Fffiles: = $ (sort $ (s_files)) $ (sort $ (c_files))

8. Create a new ANDROID.MK script

Create a new android.mk in the JNI directory with the following content:

Local_path: = $ (call My-dir)
Include $ (clear_vars)
Local_src_files: = ExportJNI.cpp ExportPlayer.cpp packetqueue.cpp/* where ExportJNI.cpp is the JNI interface I wrote */
Local_static_libraries: = Libavformat libavcodec libswscale libavutil libpostproc ffmpeg libsubtitle/* Note the order of LIBRARIES */
Local_module: = export/* final Generation libexport.so*/
Local_arm_mode: = ARM
Local_cflags: =-d__stdc_constant_macros-i$ (Local_path)/libffmpeg/-i$ (Local_path)/libsubtitle/
Local_ldlibs: =-llog
Include $ (build_shared_library)
Include $ (call all-makefiles-under,$ (Local_path))

Create a new android.mk under the Jni/libffmpeg directory:

Local_path: = $ (call My-dir)
Include $ (clear_vars)
Local_src_files: = SETTINGS.C MyLog.cpp/* If you do not need auxiliary functions such as print output, this line can be deleted */
Local_module: = FFmpeg
Local_arm_mode: = ARM
Include $ (build_static_library)
Include $ (call all-makefiles-under,$ (Local_path))

Create a new android.mk under the Jni/libffmpeg/libavformat directory:

Local_path: = $ (call My-dir)
Include $ (clear_vars)
Include $ (local_path)/. /av.mk
Local_src_files: = $ (fffiles)
Local_c_includes: =\
$ (Local_path) \
$ (Local_path)/..
Local_cflags + = $ (ffcflags)
Local_cflags + =-include "String.h"-dipv6mr_interface=ipv6mr_ifindex
Local_ldlibs: =-lz
Local_static_libraries: = $ (fflibs)
Local_module: = $ (Ffname)
Local_arm_mode: = ARM
Include $ (build_static_library)

Create a new android.mk under the Jni/libffmpeg/libavcodec directory:

Local_path: = $ (call My-dir)
Include $ (clear_vars)
Addition_inc: = $ (Local_path)/arm/makefile
Include $ (local_path)/. /av.mk
Addition_inc: =

Local_src_files: = $ (fffiles)

Local_c_includes: =\
$ (Local_path) \
$ (Local_path)/..
Local_cflags + = $ (ffcflags)
Ifeq ($ (Target_arch_abi), Armeabi)
Local_cflags + =-duse_int
endif

Local_ldlibs: =-lz
Local_static_libraries: = $ (fflibs)
Local_module: = $ (Ffname)
Local_arm_mode: = ARM
Include $ (build_static_library)

Create new android.mk in the Libavfilter, Libavutil, Libpostproc, and Libswscale directories:

Local_path:= $ (call My-dir)
Include $ (clear_vars)
include$ (Local_path)/. /av.mk
Local_src_files:= $ (fffiles)
local_c_includes:= \
$ (Local_path) \
$ (Local_path)/..
local_cflags+= $ (ffcflags)
Local_static_libraries:= $ (fflibs)
Local_module:= $ (ffname)
include$ (Build_static_library)

9. Create a new APPLICATION.MK script

Create a application.mk in the JNI directory with the following content:

App_stl: = stlport_static
App_abi: = Armeabi

Iii. NDK Compilation

Execute the Ndk-build under ffmpeg-0.11/:

$/ffmpeg-0.11# Ndk-build

The compilation process takes about 10 minutes, and finally generates LIBAVCODEC.A, LIBAVFORMAT.A, LIBAVUTIL.A, libffmpeg.a, ffmpeg-0.11/obj/local/armeabi/directory, Libswscale.a and LIBPOSTPROC.A, and libexport.so, generate libexport.so in the ffmpeg-0.11/libs/armeabi/directory.

Reprint: http://superonion.iteye.com/blog/1609777

FFmpeg Transplant Android