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vtenc: negotiate profile and level with downstream

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This commit is contained in:
Alessandro Decina 2014-12-10 22:36:53 +11:00
parent 8166487a00
commit 21f8c96d75
2 changed files with 98 additions and 3 deletions
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100
sys/applemedia/vtenc.c
View file

@ -251,6 +251,7 @@ gst_vtenc_init (GstVTEnc * self)
self->dump_attributes = FALSE;
self->latency_frames = -1;
self->session = NULL;
self->profile_level = NULL;
}
static guint
@ -482,6 +483,9 @@ gst_vtenc_stop (GstVideoEncoder * enc)
gst_vtenc_destroy_session (self, &self->session);
GST_OBJECT_UNLOCK (self);
if (self->profile_level)
CFRelease (self->profile_level);
if (self->options != NULL) {
CFRelease (self->options);
self->options = NULL;
@ -502,6 +506,94 @@ gst_vtenc_stop (GstVideoEncoder * enc)
return TRUE;
}
static CFStringRef
gst_vtenc_profile_level_key (GstVTEnc * self, const gchar * profile,
const gchar * level_arg)
{
char level[64];
gchar *key = NULL;
CFStringRef ret = NULL;
if (profile == NULL)
profile = "main";
if (level_arg == NULL)
level_arg = "AutoLevel";
strncpy (level, level_arg, sizeof (level));
if (!strcmp (profile, "constrained-baseline") ||
!strcmp (profile, "baseline")) {
profile = "Baseline";
} else if (g_str_has_prefix (profile, "high")) {
profile = "High";
} else if (!strcmp (profile, "main")) {
profile = "Main";
} else {
g_assert_not_reached ();
}
if (strlen (level) == 1) {
level[1] = '_';
level[2] = '0';
} else if (strlen (level) == 3) {
level[1] = '_';
}
key = g_strdup_printf ("H264_%s_%s", profile, level);
ret = CFStringCreateWithBytes (NULL, (const guint8 *) key, strlen (key),
kCFStringEncodingASCII, 0);
GST_INFO_OBJECT (self, "negotiated profile and level %s", key);
g_free (key);
return ret;
}
static gboolean
gst_vtenc_negotiate_profile_and_level (GstVideoEncoder * enc)
{
GstVTEnc *self = GST_VTENC_CAST (enc);
GstCaps *allowed_caps = NULL;
gboolean ret = TRUE;
const gchar *profile = NULL;
const gchar *level = NULL;
allowed_caps = gst_pad_get_allowed_caps (GST_VIDEO_ENCODER_SRC_PAD (enc));
if (allowed_caps) {
GstStructure *s;
if (gst_caps_is_empty (allowed_caps)) {
GST_ERROR_OBJECT (self, "no allowed downstream caps");
goto fail;
}
allowed_caps = gst_caps_make_writable (allowed_caps);
allowed_caps = gst_caps_fixate (allowed_caps);
s = gst_caps_get_structure (allowed_caps, 0);
profile = gst_structure_get_string (s, "profile");
level = gst_structure_get_string (s, "level");
}
if (self->profile_level)
CFRelease (self->profile_level);
self->profile_level = gst_vtenc_profile_level_key (self, profile, level);
if (self->profile_level == NULL) {
GST_ERROR_OBJECT (enc, "invalid profile and level");
goto fail;
}
out:
if (allowed_caps)
gst_caps_unref (allowed_caps);
return ret;
fail:
ret = FALSE;
goto out;
}
static gboolean
gst_vtenc_set_format (GstVideoEncoder * enc, GstVideoCodecState * state)
{
@ -522,6 +614,8 @@ gst_vtenc_set_format (GstVideoEncoder * enc, GstVideoCodecState * state)
gst_vtenc_destroy_session (self, &self->session);
GST_OBJECT_UNLOCK (self);
gst_vtenc_negotiate_profile_and_level (enc);
session = gst_vtenc_create_session (self);
GST_OBJECT_LOCK (self);
self->session = session;
@ -589,8 +683,9 @@ gst_vtenc_negotiate_downstream (GstVTEnc * self, CMSampleBufferRef sbuf)
gst_structure_set (s, "codec_data", GST_TYPE_BUFFER, codec_data_buf, NULL);
sps[0] = codec_data[1];
sps[1] = codec_data[2];
sps[1] = codec_data[2] & ~0xDF;
sps[2] = codec_data[3];
gst_codec_utils_h264_caps_set_level_and_profile (caps, sps, 3);
gst_buffer_unref (codec_data_buf);
@ -696,8 +791,7 @@ gst_vtenc_create_session (GstVTEnc * self)
(gdouble) self->negotiated_fps_n / (gdouble) self->negotiated_fps_d);
status = VTSessionSetProperty (session,
kVTCompressionPropertyKey_ProfileLevel,
kVTProfileLevel_H264_Baseline_AutoLevel);
kVTCompressionPropertyKey_ProfileLevel, self->profile_level);
GST_DEBUG_OBJECT (self, "kVTCompressionPropertyKey_ProfileLevel => %d",
(int) status);

1
sys/applemedia/vtenc.h
View file

@ -57,6 +57,7 @@ struct _GstVTEnc
const GstVTEncoderDetails * details;
CFStringRef profile_level;
guint bitrate;
gboolean allow_frame_reordering;
gboolean realtime;