[droidmedia] Query the list of supported color formats. JB#55092

This commit adds droid_media_codec_get_supported_color_formats() which
is useful for implementing a video encoder: the color format of the input
video frame must be converted to match the capabilities of the codec.

droidmediacodec.cpp

@@ -1,4 +1,5 @@
 /*
+ * Copyright (C) 2021 Open Mobile Platform LLC.
  * Copyright (C) 2014-2015 Jolla Ltd.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -765,6 +766,30 @@ bool droid_media_codec_is_supported(DroidMediaCodecMetaData *meta, bool encoder)
     return matchingCodecs.size() > 0;
 }
 
+unsigned int droid_media_codec_get_supported_color_formats(const char *mime, int encoder, uint32_t *formats, unsigned maxFormats)
+{
+    android::sp<android::MediaCodecList::IMediaCodecList> list = android::MediaCodecList::getInstance();
+    int index = 0;
+    ssize_t matchIndex = list->findCodecByType(mime, encoder, index);
+
+    if (matchIndex >= 0) {
+        const android::sp<android::MediaCodecInfo> info = list->getCodecInfo(matchIndex);
+        if (info != nullptr) {
+            const android::sp<android::MediaCodecInfo::Capabilities> caps = info->getCapabilitiesFor(mime);
+            if (caps != nullptr) {
+                android::Vector<uint32_t> colorFormats;
+                caps->getSupportedColorFormats(&colorFormats);
+                maxFormats = std::min(maxFormats, colorFormats.size());
+                for (unsigned i = 0; i < maxFormats; i++) {
+                    formats[i] = colorFormats.itemAt(i);
+                }
+                return maxFormats;
+            }
+        }
+    }
+    return 0;
+}
+
 bool droid_media_codec_start(DroidMediaCodec *codec)
 {
 #if ANDROID_MAJOR < 7

droidmediacodec.h

@@ -102,6 +102,8 @@ DroidMediaBufferQueue *droid_media_codec_get_buffer_queue (DroidMediaCodec *code
 DroidMediaCodec *droid_media_codec_create_decoder(DroidMediaCodecDecoderMetaData *meta);
 DroidMediaCodec *droid_media_codec_create_encoder(DroidMediaCodecEncoderMetaData *meta);
 bool droid_media_codec_is_supported(DroidMediaCodecMetaData *meta, bool encoder);
+unsigned int droid_media_codec_get_supported_color_formats(const char *mime, int encoder,
+							   uint32_t *formats, unsigned maxFormats);
 
 void droid_media_codec_set_callbacks(DroidMediaCodec *codec, DroidMediaCodecCallbacks *cb, void *data);
 void droid_media_codec_set_data_callbacks(DroidMediaCodec *codec,

hybris.c

@@ -225,6 +225,7 @@ HYBRIS_WRAPPER_1_0(int,droid_media_buffer_queue_length);
 HYBRIS_WRAPPER_1_1(DroidMediaCodec*,DroidMediaCodecDecoderMetaData*,droid_media_codec_create_decoder);
 HYBRIS_WRAPPER_1_1(DroidMediaCodec*,DroidMediaCodecEncoderMetaData*,droid_media_codec_create_encoder);
 HYBRIS_WRAPPER_1_2(bool,DroidMediaCodecMetaData*,bool,droid_media_codec_is_supported);
+HYBRIS_WRAPPER_1_4(unsigned,const char*,int,uint32_t*,unsigned,droid_media_codec_get_supported_color_formats);
 HYBRIS_WRAPPER_1_1(bool,DroidMediaCodec*,droid_media_codec_start);
 HYBRIS_WRAPPER_0_1(DroidMediaCodec*,droid_media_codec_stop);
 HYBRIS_WRAPPER_0_1(DroidMediaCodec *,droid_media_codec_destroy);