/**
* Look for a decoder that supports a colour format that we support.
*/
static bool
FindPreferredDecoderAndColorFormat(const sp<IOMX>& aOmx,
char *aDecoderName,
size_t aDecoderLen,
OMX_COLOR_FORMATTYPE *aColorFormat)
{
Vector<CodecCapabilities> codecs;
// Get all AVC decoder/colour format pairs that this device supports.
QueryCodecs(aOmx, AVC_MIME_TYPE, true /* queryDecoders */, &codecs);
// We assume that faster (hardware accelerated) decoders come first in the
// list, so we choose the first decoder with a colour format we can use.
for (uint32_t i = 0; i < codecs.size(); i++) {
const CodecCapabilities &caps = codecs[i];
const Vector<OMX_U32> &colors = caps.mColorFormats;
bool found = false;
for (uint32_t j = 0; j < colors.size(); j++) {
OMX_COLOR_FORMATTYPE color = (OMX_COLOR_FORMATTYPE)colors[j];
LOG("Decoder %s can output colour format %#x.\n",
caps.mComponentName.string(), color);
ColorFormatSupport supported = IsColorFormatSupported(color);
if (supported) {
strncpy(aDecoderName, caps.mComponentName.string(), aDecoderLen);
*aColorFormat = color;
found = true;
}
if (supported == ColorFormatSupportPreferred) {
// The colour format is natively supported -- that's as good as we're
// going to get.
break;
}
}
if (found) {
return true;
}
}
return false;
}
static bool isYUV420PlanarSupported(
OMXClient *client,
const sp<MetaData> &trackMeta) {
const char *mime;
CHECK(trackMeta->findCString(kKeyMIMEType, &mime));
Vector<CodecCapabilities> caps;
if (QueryCodecs(client->interface(), mime,
true, /* queryDecoders */
true, /* hwCodecOnly */
&caps) == OK) {
for (size_t j = 0; j < caps.size(); ++j) {
CodecCapabilities cap = caps[j];
for (size_t i = 0; i < cap.mColorFormats.size(); ++i) {
if (cap.mColorFormats[i] == OMX_COLOR_FormatYUV420Planar) {
return true;
}
}
}
}
return false;
}
