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fdkaacenc: Implement flush function

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The internal fdk encoder always produces 1024 bytes even with no input,
so special care should be taken to not drain it twice.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1515>
This commit is contained in:
Vivia Nikolaidou 2020-08-14 19:57:30 +03:00
parent 5d4ab18ced
commit dc58065dfb
2 changed files with 28 additions and 2 deletions
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29
ext/fdkaac/gstfdkaacenc.c
View file

@ -92,6 +92,7 @@ static GstFlowReturn gst_fdkaacenc_handle_frame (GstAudioEncoder * enc,
GstBuffer * in_buf);
static GstCaps *gst_fdkaacenc_get_caps (GstAudioEncoder * enc,
GstCaps * filter);
static void gst_fdkaacenc_flush (GstAudioEncoder * enc);
G_DEFINE_TYPE (GstFdkAacEnc, gst_fdkaacenc, GST_TYPE_AUDIO_ENCODER);
@ -146,9 +147,12 @@ gst_fdkaacenc_stop (GstAudioEncoder * enc)
GST_DEBUG_OBJECT (self, "stop");
if (self->enc)
if (self->enc) {
aacEncClose (&self->enc);
self->enc = NULL;
}
self->is_drained = TRUE;
return TRUE;
}
@ -199,10 +203,11 @@ gst_fdkaacenc_set_format (GstAudioEncoder * enc, GstAudioInfo * info)
AACENC_InfoStruct enc_info = { 0 };
gint bitrate;
if (self->enc) {
if (self->enc && !self->is_drained) {
/* drain */
gst_fdkaacenc_handle_frame (enc, NULL);
aacEncClose (&self->enc);
self->is_drained = TRUE;
}
allowed_caps = gst_pad_get_allowed_caps (GST_AUDIO_ENCODER_SRC_PAD (self));
@ -457,6 +462,10 @@ gst_fdkaacenc_handle_frame (GstAudioEncoder * enc, GstBuffer * inbuf)
in_el_sizes = 0;
in_desc.numBufs = 0;
}
/* We unset is_drained even if there's no inbuf. Basically this is a
* workaround for aacEncEncode always producing 1024 bytes even without any
* input, thus messing up with the base class counting */
self->is_drained = FALSE;
in_desc.bufferIdentifiers = &in_id;
in_desc.bufs = (void *) &imap.data;
@ -517,11 +526,26 @@ out:
return ret;
}
static void
gst_fdkaacenc_flush (GstAudioEncoder * enc)
{
GstFdkAacEnc *self = GST_FDKAACENC (enc);
GstAudioInfo *info = gst_audio_encoder_get_audio_info (enc);
aacEncClose (&self->enc);
self->enc = NULL;
self->is_drained = TRUE;
if (GST_AUDIO_INFO_IS_VALID (info))
gst_fdkaacenc_set_format (enc, info);
}
static void
gst_fdkaacenc_init (GstFdkAacEnc * self)
{
self->bitrate = DEFAULT_BITRATE;
self->enc = NULL;
self->is_drained = TRUE;
gst_audio_encoder_set_drainable (GST_AUDIO_ENCODER (self), TRUE);
}
@ -541,6 +565,7 @@ gst_fdkaacenc_class_init (GstFdkAacEncClass * klass)
base_class->set_format = GST_DEBUG_FUNCPTR (gst_fdkaacenc_set_format);
base_class->getcaps = GST_DEBUG_FUNCPTR (gst_fdkaacenc_get_caps);
base_class->handle_frame = GST_DEBUG_FUNCPTR (gst_fdkaacenc_handle_frame);
base_class->flush = GST_DEBUG_FUNCPTR (gst_fdkaacenc_flush);
g_object_class_install_property (object_class, PROP_BITRATE,
g_param_spec_int ("bitrate",

1
ext/fdkaac/gstfdkaacenc.h
View file

@ -50,6 +50,7 @@ struct _GstFdkAacEnc {
guint outbuf_size, samples_per_frame;
gboolean need_reorder;
const GstAudioChannelPosition *aac_positions;
gboolean is_drained;
};
struct _GstFdkAacEncClass {