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decoder: h264: fix decoding of BA3_SVA_C.264.

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Conformance test Base_Ext_Main_profiles/BA3_SVA_C.264 complys with
extended profile specifications. However, the SPS header has the
constraint_set1_flag syntax element set to 1. This means that, if
a Main profile compliant decoder is available, then it should be
able to decode this stream.

This changes makes it possible to fall-back from Extended profile
to Main profile if constraint_set1_flag is set to 1.

https://bugzilla.gnome.org/show_bug.cgi?id=720190
This commit is contained in:
Gwenole Beauchesne 2013-12-10 14:20:55 +01:00
parent 416ab33e34
commit 1dd89800b0
1 changed files with 31 additions and 10 deletions
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41
gst-libs/gst/vaapi/gstvaapidecoder_h264.c
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@ -752,6 +752,23 @@ gst_vaapi_decoder_h264_create(GstVaapiDecoder *base_decoder)
return TRUE;
}
static void
fill_profiles(GstVaapiProfile profiles[16], guint *n_profiles_ptr,
GstVaapiProfile profile)
{
guint n_profiles = *n_profiles_ptr;
profiles[n_profiles++] = profile;
switch (profile) {
case GST_VAAPI_PROFILE_H264_MAIN:
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_HIGH;
break;
default:
break;
}
*n_profiles_ptr = n_profiles;
}
static GstVaapiProfile
get_profile(GstVaapiDecoderH264 *decoder, GstH264SPS *sps)
{
@ -764,17 +781,21 @@ get_profile(GstVaapiDecoderH264 *decoder, GstH264SPS *sps)
if (!profile)
return GST_VAAPI_PROFILE_UNKNOWN;
if (sps->constraint_set1_flag && profile == GST_VAAPI_PROFILE_H264_BASELINE)
profile = GST_VAAPI_PROFILE_H264_CONSTRAINED_BASELINE;
profiles[n_profiles++] = profile;
fill_profiles(profiles, &n_profiles, profile);
switch (profile) {
case GST_VAAPI_PROFILE_H264_CONSTRAINED_BASELINE:
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_BASELINE;
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_MAIN;
// fall-through
case GST_VAAPI_PROFILE_H264_MAIN:
profiles[n_profiles++] = GST_VAAPI_PROFILE_H264_HIGH;
case GST_VAAPI_PROFILE_H264_BASELINE:
if (sps->constraint_set1_flag) { // A.2.2 (main profile)
fill_profiles(profiles, &n_profiles,
GST_VAAPI_PROFILE_H264_CONSTRAINED_BASELINE);
fill_profiles(profiles, &n_profiles,
GST_VAAPI_PROFILE_H264_MAIN);
}
break;
case GST_VAAPI_PROFILE_H264_EXTENDED:
if (sps->constraint_set1_flag) { // A.2.2 (main profile)
fill_profiles(profiles, &n_profiles,
GST_VAAPI_PROFILE_H264_MAIN);
}
break;
default:
break;