Android を実行する Qualcomm Snapdragon 用のビデオ アプリを開発しています。ビデオストリームを取り込んで処理し、画像に基づいてデータストリームを送信するアプリがあります。画像を HDMI に表示するモードもありますが、必須ではありません。また、起動時にアプリが自動的に実行されるように構成しました。
HDMI を接続しなくてもシステムを起動できることが重要です。ただし、モニターを接続せずにシステムを起動すると、起動プロセスが無限ループに陥り、ビデオ/オーディオ サービスを開始しようとしているように見え、失敗します。 、再試行します。HDMI が差し込まれると、システムは起動を完了し、ホーム画面に進むことができます。HDMIなしで起動しようとしたときに永遠にループされるシリアル経由で取得したログは次のとおりです。
[ 22.471956] init: property_set("ro.boottime.audioserver", "22471598897") failed: property already set
[ 22.481207] init: property_set("ro.boottime.cameraserver", "22480859470") failed: property already set
[ 22.490533] init: property_set("ro.boottime.media", "22490197595") failed: property already set
[ 22.499191] init: property_set("ro.boottime.netd", "22498862751") failed: property already set
[ 22.531151] init: property_set("ro.boottime.wificond", "22530820772") failed: property already set
[ 22.983305] MSM-CPP cpp_init_hardware:1023 stream_cnt:0
[ 23.126367] init: property_set("ro.boottime.zygote", "23125974574") failed: property already set
[ 23.206157] MSM-CPP cpp_init_hardware:1023 stream_cnt:0
[ 23.561725] msm_qti_pp_get_rms_value_control, back not active to query rms be_idx:3
[ 23.573642] msm_voice_sound_focus_get: Error getting Sound Focus Params, err=-22
[ 23.580423] msm_voice_source_tracking_get: Error getting Source Tracking Params, err=-22
[ 23.588465] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 23.594484] msm_audio_sound_focus_get: Could not get copp idx for port_id=16385
[ 23.602184] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 23.608040] msm_audio_source_tracking_get: Could not get copp idx for port_id=16385
[ 23.616115] msm_voice_sound_focus_get: Error getting Sound Focus Params, err=-22
[ 23.623421] msm_voice_source_tracking_get: Error getting Source Tracking Params, err=-22
[ 23.631478] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 23.637464] msm_audio_sound_focus_get: Could not get copp idx for port_id=4101
[ 23.644995] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 23.651027] msm_audio_source_tracking_get: Could not get copp idx for port_id=4101
[ 23.658855] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 23.664939] msm_audio_sound_focus_get: Could not get copp idx for port_id=4103
[ 23.672444] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 23.678435] msm_audio_source_tracking_get: Could not get copp idx for port_id=4103
[ 23.688260] msm_pcm_volume_ctl_get substream runtime not found
[ 23.694029] msm_pcm_volume_ctl_get substream runtime not found
[ 23.699605] msm_pcm_volume_ctl_get substream runtime not found
[ 23.705037] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.712576] msm_pcm_volume_ctl_get substream runtime not found
[ 23.717709] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.725125] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.731802] msm_pcm_volume_ctl_get substream runtime not found
[ 23.737211] msm_pcm_volume_ctl_get substream or runtime not found
[ 23.744698] msm_pcm_volume_ctl_get substream runtime not found
[ 23.749964] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.757250] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.764110] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.770790] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.777327] msm_compr_audio_effects_config_get: stream or effects inactive
[ 23.784724] msm_compr_audio_effects_config_get: stream or effects inactive
[ 25.705018] init: property_set("ro.boottime.surfaceflinger", "25704640562") failed: property already set
[ 25.705499] init: Failed to bind socket 'pdx/system/vr/display/client': No such file or directory
[ 25.705779] init: Failed to bind socket 'pdx/system/vr/display/manager': No such file or directory
[ 25.706060] init: Failed to bind socket 'pdx/system/vr/display/vsync': No such file or directory
[ 26.052708] init: Unable to open '/sys/android_power/request_state': No such file or directory
[ 26.060404] init: Unable to write to '/sys/power/state': Invalid argument
[ 26.138413] init: property_set("ro.boottime.hwcomposer-2-1", "26138041187") failed: property already set
[ 26.534961] init: property_set("ro.boottime.audio-hal-2-0", "26534542802") failed: property already set
[ 27.048016] msm_qti_pp_get_rms_value_control, back not active to query rms be_idx:3
[ 27.057638] msm_voice_sound_focus_get: Error getting Sound Focus Params, err=-22
[ 27.064137] msm_voice_source_tracking_get: Error getting Source Tracking Params, err=-22
[ 27.072189] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 27.078398] msm_audio_sound_focus_get: Could not get copp idx for port_id=16385
[ 27.085828] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 27.092048] msm_audio_source_tracking_get: Could not get copp idx for port_id=16385
[ 27.099817] msm_voice_sound_focus_get: Error getting Sound Focus Params, err=-22
[ 27.107172] msm_voice_source_tracking_get: Error getting Source Tracking Params, err=-22
[ 27.115220] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 27.121482] msm_audio_sound_focus_get: Could not get copp idx for port_id=4101
[ 27.128760] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 27.135023] msm_audio_source_tracking_get: Could not get copp idx for port_id=4101
[ 27.142667] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 27.148883] msm_audio_sound_focus_get: Could not get copp idx for port_id=4103
[ 27.156218] msm_audio_get_copp_idx_from_port_id: Invalid FE, exiting
[ 27.162444] msm_audio_source_tracking_get: Could not get copp idx for port_id=4103
[ 27.171810] msm_pcm_volume_ctl_get substream runtime not found
[ 27.177051] msm_pcm_volume_ctl_get substream runtime not found
[ 27.182976] msm_pcm_volume_ctl_get substream runtime not found
[ 27.188378] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.195922] msm_pcm_volume_ctl_get substream runtime not found
[ 27.201188] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.208164] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.215088] msm_pcm_volume_ctl_get substream runtime not found
[ 27.220547] msm_pcm_volume_ctl_get substream or runtime not found
[ 27.227649] msm_pcm_volume_ctl_get substream runtime not found
[ 27.232647] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.239729] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.246622] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.253478] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.260348] msm_compr_audio_effects_config_get: stream or effects inactive
[ 27.267146] msm_compr_audio_effects_config_get: stream or effects inactive
init.rc ファイルを編集して、起動時にオーディオ/ビデオ サービスが実行されないようにし、起動後に HDMI が接続されたときに ueventd に何らかの「ホット プラグ」を登録する方法が必要だと思います。
これらのことを調べましたが、実際にそれらを実装する方法がわかりません。これが正しいパスかどうかはわかりません。どんな助けでも大歓迎です！
編集: Android のソース コードを編集してこれを適切に行う方法は、私の給与水準をはるかに超えているようですが、簡単な修正は、HDMI モニターをシミュレートする HDMI ダミー プラグを購入することです。基本的に、オペレーティングシステムが最初にディスプレイを探すときに、レジスタとスピットに EDID データが含まれているだけです。