The Android framework provides support for the ETC1 compression format as a standard feature,
..
Beyond the ETC formats, Android devices have varied support for texture compression based on their GPU chipsets and OpenGL implementations.
Note: Once you decide which texture compression formats your application will support, make sure you declare them in your manifest using <supports-gl-texture> . Using this declaration enables filtering by external services such as Google Play, so that your app is installed only on devices that support the formats your app requires. For details, see OpenGL manifest declarations.
Each time you upload an application to the Google Play Developer Console, Google Play scans the application's manifest file and looks for anyhttp://developer.android.com/intl/zh-tw/guide/topics/manifest/supports-gl-texture-element.html#market-texture-filteringelements. It extracts the format descriptors from the elements and stores them internally as metadata associated with the application .apk and the application version.
When a user searches or browses for applications on Google Play, the service compares the texture compression formats supported by the application with those supported by the user's device. The comparison is based on the format descriptor strings and a match must be exact.
If any of an application's supported texture compression formats is also supported by the device, Google Play allows the user to see the application and potentially download it. Otherwise, if none of the application's formats is supported by the device, Google Play filters the application so that it is not available for download.
root@sabreauto_6q:/ # tinyplay Usage: tinyplay file.wav [-D card] [-d device] [-p period_size] [-n n_periods]
snprintf(fn, sizeof(fn), "/dev/snd/pcmC%uD%u%c", card, device,
flags & PCM_IN ? 'c' : 'p');
pcm->flags = flags;
pcm->fd = open(fn, O_RDWR);
看一下系統 /dev/snd/..
1|root@sabreauto_6q:/ # ls /dev/snd/ controlC0 controlC1 pcmC0D0c pcmC0D0p pcmC1D0c timer所以play 就是...
# tinyplay 1ch48k.wav -D 0 -d 0
# echo N > /sys/module/nfs/parameters/nfs4_disable_idmappingclean idmap cache and restart idmap daemon:
# nfsidmap -c # service rpcidmapd restartNow on server and the client will send instead of numeric IDs string principals like bob@YOURDOMAIN.COM. You need to have bob account on the both hosts - client and server. Nevertheless, the numeric ID's can be different.
環境: Server: CentOS / Fedora Client: Debian / Ubuntu Server # yum install nfs-utils # vi /etc/idmapd.conf Domain = localdomain # vi /etc/exports /path *(rw,sync,no_root_squash,no_subtree_check) # exportfs -rv # service rpcbind start # service nfs start # chkconfig nfs on # chkconfig rpcbind on Client $ sudo apt-get install nfs-common $ sudo vi /etc/idmapd.conf Domain = localdomain $ sudo service nfs-common restart (Debian) 或 $ sudo service idmapd restart (Ubuntu 12.04) Ubuntu 13.10 只要改好 /etc/idmapd.conf 立即生效, 無需其他操作 $ mount -t nfs4 remote:/path /local/mount/point
error: ro.build.fingerprint cannot exceed 91 bytes:然後網路上說，改一些 PROP_VALUE_MAX 的值：
Edit build/tools/post_process_props.py. Change lines as follows: PROP_NAME_MAX = 31 # PROP_VALUE_MAX = 91 PROP_VALUE_MAX = 128 Edit bionic/libc/include/sys/system_properties.h. Change lines as follows: #define PROP_NAME_MAX 32 // #define PROP_VALUE_MAX 92 #define PROP_VALUE_MAX 128 Do make clean make所以照著改...
In file included from hardware/qcom/camera/QCamera/HAL/core/src/QCameraHWI_Record.cpp:27:0:
In function 'int property_get(const char*, char*, const char*)',
inlined from 'virtual android::status_t android::QCameraStream_record::getBuf(mm_camera_frame_len_offset*, uint8_t, uint8_t*, mm_camera_buf_def_t*)'
at
hardware/qcom/camera/QCamera/HAL/core/src/QCameraHWI_Record.cpp:220:60:
system/core/include/cutils/properties.h:122:41:
error: call to '__property_get_too_small_error' declared with attribute error:
property_get() called with too small of a buffer
__property_get_too_small_error();
因為一開始出現了 ...所以改 PROPERTY_VALUE_MAX 從 92 改 128.
int property_get(const char *key, char *value, const char *default_value) {
size_t bos = __bos(value);
if (bos < PROPERTY_VALUE_MAX) {
__property_get_too_small_error();
...
char value[100];
...
property_get("persist.camera.mem.usecache",value,"1");
...
把 value[100] 改 value[PROPERTY_VALUE_MAX]DEFINE_CLK DEFINE_CLK_FIXED_RATE DEFINE_CLK_GATE DEFINE_CLK_DIVIDER DEFINE_CLK_DIVIDER_TABLE DEFINE_CLK_MUX DEFINE_CLK_FIXED_FACTOR但是這些imx 都沒用...
CLK_OF_DECLARE(imx6q, "fsl,imx6q-ccm", imx6q_clocks_init);device tree 宣告在： imx6qdl.dtsi:
clks: ccm@020c4000 {
compatible = "fsl,imx6q-ccm";
reg = <0x020c4000 0x4000>;
interrupts = <0 87 0x04 0 88 0x04>;
#clock-cells = <1>;
};
Clock ID
---------------------------
dummy 0
ckil 1
ckih 2
osc 3
pll2_pfd0_352m 4
pll2_pfd1_594m 5
pll2_pfd2_396m 6
pll3_pfd0_720m 7
pll3_pfd1_540m 8
pll3_pfd2_508m 9
pll3_pfd3_454m 10
pll2_198m 11
pll3_120m 12
pll3_80m 13
pll3_60m 14
twd 15
step 16
pll1_sw 17
periph_pre 18
periph2_pre 19
periph_clk2_sel 20
periph2_clk2_sel 21
axi_sel 22
esai_sel 23
spdif1_sel 24
spdif_sel 25
...
Examples:
clks: ccm@020c4000 {
compatible = "fsl,imx6q-ccm";
reg = <0x020c4000 0x4000>;
interrupts = <0 87 0x04 0 88 0x04>;
#clock-cells = <1>;
};
uart1: serial@02020000 {
compatible = "fsl,imx6q-uart", "fsl,imx21-uart";
reg = <0x02020000 0x4000>;
interrupts = <0 26 0x04>;
clocks = <&clks 160>, <&clks 161>;
clock-names = "ipg", "per";
status = "disabled";
};
idex 分別是 160, 161
clk[dummy] = imx_clk_fixed("dummy", 0);
clk[ckil] = imx_obtain_fixed_clock("ckil", 0);
clk[ckih] = imx_obtain_fixed_clock("ckih1", 0);
clk[osc] = imx_obtain_fixed_clock("osc", 0);
/* Clock source from external clock via ANACLK1/2 PADs */
clk[anaclk1] = imx_obtain_fixed_clock("anaclk1", 0);
clk[anaclk2] = imx_obtain_fixed_clock("anaclk2", 0);
ckil : external low freqroot@wandboard:/sys/kernel/debug/clk # busybox find . -name 'esai*' ./osc/pll2_bus/pll2_pfd2_396m/periph_pre/periph/ahb/esai_ipg ./osc/pll2_bus/pll2_pfd2_396m/periph_pre/periph/ahb/esai_mem ./osc/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel ./osc/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel/esai_pred ./osc/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel/esai_pred/esai_podf ./osc/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel/esai_pred/esai_podf/esai_extalsabreauto:
root@sabreauto_6q:/sys/kernel/debug/clk # busybox find . -name 'esai*' ./osc/pll2_bus/pll2_pfd2_396m/periph_pre/periph/ahb/esai_ipg ./osc/pll2_bus/pll2_pfd2_396m/periph_pre/periph/ahb/esai_mem ./anaclk2/lvds2_in/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel ./anaclk2/lvds2_in/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel/esai_pred ./anaclk2/lvds2_in/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel/esai_pred/esai_podf ./anaclk2/lvds2_in/pll4_sel/pll4_audio/pll4_post_div/pll4_audio_div/esai_sel/esai_pred/esai_podf/esai_extal因為 mach-imx6q.c 的 ..
static void __init imx6q_audio_lvds2_init(void)
{
struct clk *pll4_sel, *lvds2_in, *pll4_audio_div, *esai_extal;
printk("%s\n",__func__);
pll4_audio_div = clk_get_sys(NULL, "pll4_audio_div");
pll4_sel = clk_get_sys(NULL, "pll4_sel");
lvds2_in = clk_get_sys(NULL, "lvds2_in");
esai_extal = clk_get_sys(NULL, "esai_extal");
if (IS_ERR(pll4_audio_div) || IS_ERR(pll4_sel) ||
IS_ERR(lvds2_in) || IS_ERR(esai_extal))
return;
if (clk_get_rate(lvds2_in) != ESAI_AUDIO_MCLK)
return;
clk_set_parent(pll4_sel, lvds2_in);
clk_set_rate(pll4_audio_div, 786432000);
clk_set_rate(esai_extal, ESAI_AUDIO_MCLK);
}
把 pll4_sel 的 parent 改到 lvds2_in
{ "osc", "lvds1_in", "lvds2_in", "dummy", }