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mpeg2: fix decoding of high profile streams.

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Allow MPEG-2 High profile streams only if the HW supports that profile
or no High profile specific bits are used, and thus Main profile could
be used instead. i.e. chroma_format is 4:2:0, intra_dc_precision is not
set to 11 and no sequence_scalable_extension() was parsed.
This commit is contained in:
Gwenole Beauchesne 2012-04-02 16:07:58 +02:00
parent 84b5fc5e58
commit 9c8b85b3c7
3 changed files with 70 additions and 14 deletions

1
NEWS
View file

@ -5,6 +5,7 @@ Copyright (C) 2011 Collabora
Version 0.3.7 - DD.Apr.2012
* Fix vaapidecode to report unsupported codec profiles
* Fix decoding of MPEG-2 High profile streams compatible with Main profile
* Don't forcibly resize user provided X windows (Holger Kaelberer)
* Recalculate render rect only if caps are negotiated (Holger Kaelberer)

77
gst-libs/gst/vaapi/gstvaapidecoder_mpeg2.c
View file

@ -165,6 +165,7 @@ pts_eval(PTSGenerator *tsg, GstClockTime pic_pts, guint pic_tsn)
struct _GstVaapiDecoderMpeg2Private {
GstVaapiProfile profile;
GstVaapiProfile hw_profile;
guint width;
guint height;
guint fps_n;
@ -329,13 +330,66 @@ copy_quant_matrix(guint8 dst[64], const guint8 src[64])
memcpy(dst, src, 64);
}
static const char *
get_profile_str(GstVaapiProfile profile)
{
char *str;
switch (profile) {
case GST_VAAPI_PROFILE_MPEG2_SIMPLE: str = "simple"; break;
case GST_VAAPI_PROFILE_MPEG2_MAIN: str = "main"; break;
case GST_VAAPI_PROFILE_MPEG2_HIGH: str = "high"; break;
default: str = "<unknown>"; break;
}
return str;
}
static GstVaapiProfile
get_profile(GstVaapiDecoderMpeg2 *decoder, GstVaapiEntrypoint entrypoint)
{
GstVaapiDisplay * const va_display = GST_VAAPI_DECODER_DISPLAY(decoder);
GstVaapiDecoderMpeg2Private * const priv = decoder->priv;
GstVaapiProfile profile = priv->profile;
do {
/* Return immediately if the exact same profile was found */
if (gst_vaapi_display_has_decoder(va_display, profile, entrypoint))
break;
/* Otherwise, try to map to a higher profile */
switch (profile) {
case GST_VAAPI_PROFILE_MPEG2_SIMPLE:
profile = GST_VAAPI_PROFILE_MPEG2_MAIN;
break;
case GST_VAAPI_PROFILE_MPEG2_MAIN:
profile = GST_VAAPI_PROFILE_MPEG2_HIGH;
break;
case GST_VAAPI_PROFILE_MPEG2_HIGH:
// Try to map to main profile if no high profile specific bits used
if (priv->profile == profile &&
!priv->has_seq_scalable_ext &&
(priv->has_seq_ext && priv->seq_ext.chroma_format == 1)) {
profile = GST_VAAPI_PROFILE_MPEG2_MAIN;
break;
}
// fall-through
default:
profile = GST_VAAPI_PROFILE_UNKNOWN;
break;
}
} while (profile != GST_VAAPI_PROFILE_UNKNOWN);
if (profile != priv->profile)
GST_INFO("forced %s profile to %s profile",
get_profile_str(priv->profile), get_profile_str(profile));
return profile;
}
static GstVaapiDecoderStatus
ensure_context(GstVaapiDecoderMpeg2 *decoder)
{
GstVaapiDecoderMpeg2Private * const priv = decoder->priv;
GstVaapiProfile profiles[2];
GstVaapiEntrypoint entrypoint = GST_VAAPI_ENTRYPOINT_VLD;
guint i, n_profiles = 0;
gboolean reset_context = FALSE;
if (priv->profile_changed) {
@ -343,18 +397,9 @@ ensure_context(GstVaapiDecoderMpeg2 *decoder)
priv->profile_changed = FALSE;
reset_context = TRUE;
profiles[n_profiles++] = priv->profile;
if (priv->profile == GST_VAAPI_PROFILE_MPEG2_SIMPLE)
profiles[n_profiles++] = GST_VAAPI_PROFILE_MPEG2_MAIN;
for (i = 0; i < n_profiles; i++) {
if (gst_vaapi_display_has_decoder(GST_VAAPI_DECODER_DISPLAY(decoder),
profiles[i], entrypoint))
break;
}
if (i == n_profiles)
priv->hw_profile = get_profile(decoder, entrypoint);
if (priv->hw_profile == GST_VAAPI_PROFILE_UNKNOWN)
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
priv->profile = profiles[i];
}
if (priv->size_changed) {
@ -366,7 +411,7 @@ ensure_context(GstVaapiDecoderMpeg2 *decoder)
if (reset_context) {
reset_context = gst_vaapi_decoder_ensure_context(
GST_VAAPI_DECODER(decoder),
priv->profile,
priv->hw_profile,
entrypoint,
priv->width, priv->height
);
@ -522,6 +567,9 @@ decode_sequence_ext(GstVaapiDecoderMpeg2 *decoder, guchar *buf, guint buf_size)
case GST_MPEG_VIDEO_PROFILE_MAIN:
profile = GST_VAAPI_PROFILE_MPEG2_MAIN;
break;
case GST_MPEG_VIDEO_PROFILE_HIGH:
profile = GST_VAAPI_PROFILE_MPEG2_HIGH;
break;
default:
GST_ERROR("unsupported profile %d", seq_ext->profile);
return GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE;
@ -1080,6 +1128,7 @@ gst_vaapi_decoder_mpeg2_init(GstVaapiDecoderMpeg2 *decoder)
priv->height = 0;
priv->fps_n = 0;
priv->fps_d = 0;
priv->hw_profile = GST_VAAPI_PROFILE_UNKNOWN;
priv->profile = GST_VAAPI_PROFILE_MPEG2_SIMPLE;
priv->current_picture = NULL;
priv->adapter = NULL;

6
gst-libs/gst/vaapi/gstvaapiprofile.h
View file

@ -65,12 +65,16 @@ enum _GstVaapiCodec {
/**
* GstVaapiProfile:
* @GST_VAAPI_PROFILE_UNKNOWN:
* Unknown profile, used for initializers
* @GST_VAAPI_PROFILE_MPEG1:
* MPEG-1
* @GST_VAAPI_PROFILE_MPEG2_SIMPLE:
* MPEG-2 simple profile
* @GST_VAAPI_PROFILE_MPEG2_MAIN:
* MPEG-2 main profile
* @GST_VAAPI_PROFILE_MPEG2_HIGH:
* MPEG-2 high profile
* @GST_VAAPI_PROFILE_MPEG4_SIMPLE:
* MPEG-4 Part-2 simple profile
* @GST_VAAPI_PROFILE_MPEG4_ADVANCED_SIMPLE:
@ -95,9 +99,11 @@ enum _GstVaapiCodec {
* The set of all profiles for #GstVaapiProfile.
*/
enum _GstVaapiProfile {
GST_VAAPI_PROFILE_UNKNOWN = 0,
GST_VAAPI_PROFILE_MPEG1 = GST_VAAPI_MAKE_PROFILE(MPEG1,1),
GST_VAAPI_PROFILE_MPEG2_SIMPLE = GST_VAAPI_MAKE_PROFILE(MPEG2,1),
GST_VAAPI_PROFILE_MPEG2_MAIN = GST_VAAPI_MAKE_PROFILE(MPEG2,2),
GST_VAAPI_PROFILE_MPEG2_HIGH = GST_VAAPI_MAKE_PROFILE(MPEG2,3),
GST_VAAPI_PROFILE_MPEG4_SIMPLE = GST_VAAPI_MAKE_PROFILE(MPEG4,1),
GST_VAAPI_PROFILE_MPEG4_ADVANCED_SIMPLE = GST_VAAPI_MAKE_PROFILE(MPEG4,2),
GST_VAAPI_PROFILE_MPEG4_MAIN = GST_VAAPI_MAKE_PROFILE(MPEG4,3),