gstreamer/sys/applemedia/vtenc.c
Andoni Morales Alastruey 97bb1edf6c applemedia: don't use the dynamic API for public frameworks
Public frameworks don't need to build the API dynamically, we instead
use the framework directly.
The exception is for VideoToolbox which went public in the 10.8 SDK,
but it's still private in older version of the SDK and iOS. This allow
building the plugin against SDK's where it's not a public framework.
2013-05-20 13:31:02 +02:00

970 lines
28 KiB
C

/*
* Copyright (C) 2010, 2013 Ole André Vadla Ravnås <oleavr@soundrop.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "vtenc.h"
#include "coremediabuffer.h"
#include "vtutil.h"
#define VTENC_DEFAULT_USAGE 6 /* Profile: Baseline Level: 2.1 */
#define VTENC_DEFAULT_BITRATE 768
#define VTENC_MIN_RESET_INTERVAL (GST_SECOND / 2)
GST_DEBUG_CATEGORY (gst_vtenc_debug);
#define GST_CAT_DEFAULT (gst_vtenc_debug)
#define GST_VTENC_CODEC_DETAILS_QDATA \
g_quark_from_static_string ("vtenc-codec-details")
enum
{
PROP_0,
PROP_USAGE,
PROP_BITRATE
};
typedef struct _GstVTEncFrame GstVTEncFrame;
struct _GstVTEncFrame
{
GstBuffer *buf;
GstMapInfo map;
};
static GstElementClass *parent_class = NULL;
static void gst_vtenc_get_property (GObject * obj, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_vtenc_set_property (GObject * obj, guint prop_id,
const GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_vtenc_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_vtenc_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_vtenc_sink_setcaps (GstVTEnc * self, GstCaps * caps);
static void gst_vtenc_clear_cached_caps_downstream (GstVTEnc * self);
static GstFlowReturn gst_vtenc_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static gboolean gst_vtenc_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static VTCompressionSessionRef gst_vtenc_create_session (GstVTEnc * self);
static void gst_vtenc_destroy_session (GstVTEnc * self,
VTCompressionSessionRef * session);
static void gst_vtenc_session_dump_properties (GstVTEnc * self,
VTCompressionSessionRef session);
static void gst_vtenc_session_configure_usage (GstVTEnc * self,
VTCompressionSessionRef session, gint usage);
static void gst_vtenc_session_configure_expected_framerate (GstVTEnc * self,
VTCompressionSessionRef session, gdouble framerate);
static void gst_vtenc_session_configure_expected_duration (GstVTEnc * self,
VTCompressionSessionRef session, gdouble duration);
static void gst_vtenc_session_configure_max_keyframe_interval (GstVTEnc * self,
VTCompressionSessionRef session, gint interval);
static void gst_vtenc_session_configure_max_keyframe_interval_duration
(GstVTEnc * self, VTCompressionSessionRef session, gdouble duration);
static void gst_vtenc_session_configure_bitrate (GstVTEnc * self,
VTCompressionSessionRef session, guint bitrate);
static VTStatus gst_vtenc_session_configure_property_int (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gint value);
static VTStatus gst_vtenc_session_configure_property_double (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gdouble value);
static GstFlowReturn gst_vtenc_encode_frame (GstVTEnc * self, GstBuffer * buf);
static VTStatus gst_vtenc_enqueue_buffer (void *data, int a2, int a3, int a4,
CMSampleBufferRef sbuf, int a6, int a7);
static gboolean gst_vtenc_buffer_is_keyframe (GstVTEnc * self,
CMSampleBufferRef sbuf);
static GstVTEncFrame *gst_vtenc_frame_new (GstBuffer * buf);
static void gst_vtenc_frame_free (GstVTEncFrame * frame);
static void
gst_vtenc_base_init (GstVTEncClass * klass)
{
const GstVTEncoderDetails *codec_details =
GST_VTENC_CLASS_GET_CODEC_DETAILS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
const int min_width = 1, max_width = G_MAXINT;
const int min_height = 1, max_height = G_MAXINT;
const int min_fps_n = 0, max_fps_n = G_MAXINT;
const int min_fps_d = 1, max_fps_d = 1;
GstPadTemplate *sink_template, *src_template;
GstCaps *src_caps;
gchar *longname, *description;
longname = g_strdup_printf ("%s encoder", codec_details->name);
description = g_strdup_printf ("%s encoder", codec_details->name);
gst_element_class_set_metadata (element_class, longname,
"Codec/Encoder/Video", description,
"Ole André Vadla Ravnås <oleavr@soundrop.com>");
g_free (longname);
g_free (description);
sink_template = gst_pad_template_new ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, "NV12",
"width", GST_TYPE_INT_RANGE, min_width, max_width,
"height", GST_TYPE_INT_RANGE, min_height, max_height,
"framerate", GST_TYPE_FRACTION_RANGE,
min_fps_n, min_fps_d, max_fps_n, max_fps_d, NULL));
gst_element_class_add_pad_template (element_class, sink_template);
src_caps = gst_caps_new_simple (codec_details->mimetype,
"width", GST_TYPE_INT_RANGE, min_width, max_width,
"height", GST_TYPE_INT_RANGE, min_height, max_height,
"framerate", GST_TYPE_FRACTION_RANGE,
min_fps_n, min_fps_d, max_fps_n, max_fps_d, NULL);
if (codec_details->format_id == kVTFormatH264) {
gst_structure_set (gst_caps_get_structure (src_caps, 0),
"stream-format", G_TYPE_STRING, "avc", NULL);
}
src_template = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
src_caps);
gst_element_class_add_pad_template (element_class, src_template);
}
static void
gst_vtenc_class_init (GstVTEncClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_class->get_property = gst_vtenc_get_property;
gobject_class->set_property = gst_vtenc_set_property;
gstelement_class->change_state = gst_vtenc_change_state;
g_object_class_install_property (gobject_class, PROP_USAGE,
g_param_spec_int ("usage", "Usage",
"Usage enumeration value",
G_MININT, G_MAXINT, VTENC_DEFAULT_USAGE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BITRATE,
g_param_spec_uint ("bitrate", "Bitrate",
"Target video bitrate in kbps",
1, G_MAXUINT, VTENC_DEFAULT_BITRATE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
}
static void
gst_vtenc_init (GstVTEnc * self)
{
GstVTEncClass *klass = (GstVTEncClass *) G_OBJECT_GET_CLASS (self);
GstElementClass *element_klass = GST_ELEMENT_CLASS (klass);
GstElement *element = GST_ELEMENT (self);
self->details = GST_VTENC_CLASS_GET_CODEC_DETAILS (klass);
self->sinkpad = gst_pad_new_from_template
(gst_element_class_get_pad_template (element_klass, "sink"), "sink");
gst_element_add_pad (element, self->sinkpad);
gst_pad_set_event_function (self->sinkpad, gst_vtenc_sink_event);
gst_pad_set_chain_function (self->sinkpad, gst_vtenc_chain);
self->srcpad = gst_pad_new_from_template
(gst_element_class_get_pad_template (element_klass, "src"), "src");
gst_pad_set_event_function (self->srcpad, gst_vtenc_src_event);
gst_element_add_pad (element, self->srcpad);
/* These could be controlled by properties later */
self->dump_properties = FALSE;
self->dump_attributes = FALSE;
}
static gint
gst_vtenc_get_usage (GstVTEnc * self)
{
gint result;
GST_OBJECT_LOCK (self);
result = self->usage;
GST_OBJECT_UNLOCK (self);
return result;
}
static void
gst_vtenc_set_usage (GstVTEnc * self, gint usage)
{
GST_OBJECT_LOCK (self);
self->usage = usage;
if (self->session != NULL)
gst_vtenc_session_configure_usage (self, self->session, usage);
GST_OBJECT_UNLOCK (self);
}
static guint
gst_vtenc_get_bitrate (GstVTEnc * self)
{
guint result;
GST_OBJECT_LOCK (self);
result = self->bitrate;
GST_OBJECT_UNLOCK (self);
return result;
}
static void
gst_vtenc_set_bitrate (GstVTEnc * self, guint bitrate)
{
GST_OBJECT_LOCK (self);
self->bitrate = bitrate;
if (self->session != NULL)
gst_vtenc_session_configure_bitrate (self, self->session, bitrate);
GST_OBJECT_UNLOCK (self);
}
static void
gst_vtenc_get_property (GObject * obj, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVTEnc *self = GST_VTENC_CAST (obj);
switch (prop_id) {
case PROP_USAGE:
g_value_set_int (value, gst_vtenc_get_usage (self));
break;
case PROP_BITRATE:
g_value_set_uint (value, gst_vtenc_get_bitrate (self) * 8 / 1000);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, prop_id, pspec);
break;
}
}
static void
gst_vtenc_set_property (GObject * obj, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstVTEnc *self = GST_VTENC_CAST (obj);
switch (prop_id) {
case PROP_USAGE:
gst_vtenc_set_usage (self, g_value_get_int (value));
break;
case PROP_BITRATE:
gst_vtenc_set_bitrate (self, g_value_get_uint (value) * 1000 / 8);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_vtenc_change_state (GstElement * element, GstStateChange transition)
{
GstVTEnc *self = GST_VTENC_CAST (element);
GError *error = NULL;
GstStateChangeReturn ret;
if (transition == GST_STATE_CHANGE_NULL_TO_READY) {
self->ctx = gst_core_media_ctx_new (GST_API_VIDEO_TOOLBOX, &error);
if (error != NULL)
goto api_error;
self->cur_outbufs = g_ptr_array_new ();
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (transition == GST_STATE_CHANGE_READY_TO_NULL) {
GST_OBJECT_LOCK (self);
gst_vtenc_destroy_session (self, &self->session);
if (self->options != NULL) {
CFRelease (self->options);
self->options = NULL;
}
self->negotiated_width = self->negotiated_height = 0;
self->negotiated_fps_n = self->negotiated_fps_d = 0;
gst_vtenc_clear_cached_caps_downstream (self);
GST_OBJECT_UNLOCK (self);
g_ptr_array_free (self->cur_outbufs, TRUE);
self->cur_outbufs = NULL;
g_object_unref (self->ctx);
self->ctx = NULL;
}
return ret;
api_error:
{
GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("API error"),
("%s", error->message));
g_clear_error (&error);
return GST_STATE_CHANGE_FAILURE;
}
}
static gboolean
gst_vtenc_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstVTEnc *self = GST_VTENC_CAST (parent);
gboolean forward = TRUE;
gboolean res = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_vtenc_sink_setcaps (self, caps);
}
default:
break;
}
if (forward)
res = gst_pad_event_default (pad, parent, event);
return res;
}
static gboolean
gst_vtenc_sink_setcaps (GstVTEnc * self, GstCaps * caps)
{
GstStructure *structure;
VTCompressionSessionRef session;
GST_OBJECT_LOCK (self);
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "width", &self->negotiated_width);
gst_structure_get_int (structure, "height", &self->negotiated_height);
gst_structure_get_fraction (structure, "framerate",
&self->negotiated_fps_n, &self->negotiated_fps_d);
gst_vtenc_destroy_session (self, &self->session);
GST_OBJECT_UNLOCK (self);
session = gst_vtenc_create_session (self);
GST_OBJECT_LOCK (self);
self->session = session;
if (self->options != NULL)
CFRelease (self->options);
self->options = CFDictionaryCreateMutable (NULL, 0,
&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
/* renegotiate when upstream caps change */
gst_pad_mark_reconfigure (self->srcpad);
GST_OBJECT_UNLOCK (self);
return TRUE;
}
static gboolean
gst_vtenc_is_negotiated (GstVTEnc * self)
{
return self->negotiated_width != 0;
}
static gboolean
gst_vtenc_negotiate_downstream (GstVTEnc * self, CMSampleBufferRef sbuf)
{
gboolean result;
GstCaps *caps;
GstStructure *s;
if (self->caps_width == self->negotiated_width &&
self->caps_height == self->negotiated_height &&
self->caps_fps_n == self->negotiated_fps_n &&
self->caps_fps_d == self->negotiated_fps_d) {
return TRUE;
}
caps = gst_caps_copy (gst_pad_get_pad_template_caps (self->srcpad));
s = gst_caps_get_structure (caps, 0);
gst_structure_set (s,
"width", G_TYPE_INT, self->negotiated_width,
"height", G_TYPE_INT, self->negotiated_height,
"framerate", GST_TYPE_FRACTION,
self->negotiated_fps_n, self->negotiated_fps_d, NULL);
if (self->details->format_id == kVTFormatH264) {
CMFormatDescriptionRef fmt;
CFDictionaryRef atoms;
CFStringRef avccKey;
CFDataRef avcc;
gpointer codec_data;
gsize codec_data_size;
GstBuffer *codec_data_buf;
fmt = CMSampleBufferGetFormatDescription (sbuf);
atoms = CMFormatDescriptionGetExtension (fmt,
kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms);
avccKey = CFStringCreateWithCString (NULL, "avcC", kCFStringEncodingUTF8);
avcc = CFDictionaryGetValue (atoms, avccKey);
CFRelease (avccKey);
codec_data_size = CFDataGetLength (avcc);
codec_data = g_malloc (codec_data_size);
CFDataGetBytes (avcc, CFRangeMake (0, codec_data_size), codec_data);
codec_data_buf = gst_buffer_new_wrapped (codec_data, codec_data_size);
gst_structure_set (s, "codec_data", GST_TYPE_BUFFER, codec_data_buf, NULL);
gst_buffer_unref (codec_data_buf);
}
result = gst_pad_push_event (self->srcpad, gst_event_new_caps (caps));
self->caps_width = self->negotiated_width;
self->caps_height = self->negotiated_height;
self->caps_fps_n = self->negotiated_fps_n;
self->caps_fps_d = self->negotiated_fps_d;
return result;
}
static void
gst_vtenc_clear_cached_caps_downstream (GstVTEnc * self)
{
self->caps_width = self->caps_height = 0;
self->caps_fps_n = self->caps_fps_d = 0;
}
static GstFlowReturn
gst_vtenc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstVTEnc *self = GST_VTENC_CAST (parent);
if (!gst_vtenc_is_negotiated (self))
goto not_negotiated;
return gst_vtenc_encode_frame (self, buf);
not_negotiated:
gst_buffer_unref (buf);
return GST_FLOW_NOT_NEGOTIATED;
}
static gboolean
gst_vtenc_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstVTEnc *self = GST_VTENC_CAST (parent);
gboolean ret = TRUE;
gboolean handled = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_UPSTREAM:
if (gst_event_has_name (event, "rtcp-pli")) {
GST_OBJECT_LOCK (self);
if (self->options != NULL) {
GST_INFO_OBJECT (self, "received PLI, will force intra");
CFDictionaryAddValue (self->options,
*(self->ctx->vt->kVTEncodeFrameOptionKey_ForceKeyFrame),
kCFBooleanTrue);
} else {
GST_INFO_OBJECT (self,
"received PLI but encode not yet started, ignoring");
}
GST_OBJECT_UNLOCK (self);
handled = TRUE;
}
break;
default:
break;
}
if (handled)
gst_event_unref (event);
else
ret = gst_pad_push_event (self->sinkpad, event);
return ret;
}
static VTCompressionSessionRef
gst_vtenc_create_session (GstVTEnc * self)
{
VTCompressionSessionRef session = NULL;
GstVTApi *vt = self->ctx->vt;
CFMutableDictionaryRef pb_attrs;
VTCompressionOutputCallback callback;
VTStatus status;
pb_attrs = CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
gst_vtutil_dict_set_i32 (pb_attrs, kCVPixelBufferPixelFormatTypeKey,
kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange);
gst_vtutil_dict_set_i32 (pb_attrs, kCVPixelBufferWidthKey,
self->negotiated_width);
gst_vtutil_dict_set_i32 (pb_attrs, kCVPixelBufferHeightKey,
self->negotiated_height);
callback.func = gst_vtenc_enqueue_buffer;
callback.data = self;
status = vt->VTCompressionSessionCreate (NULL,
self->negotiated_width, self->negotiated_height,
self->details->format_id, 0, pb_attrs, 0, callback, &session);
GST_INFO_OBJECT (self, "VTCompressionSessionCreate for %d x %d => %d",
self->negotiated_width, self->negotiated_height, status);
if (status != kVTSuccess)
goto beach;
if (self->dump_properties) {
gst_vtenc_session_dump_properties (self, session);
self->dump_properties = FALSE;
}
gst_vtenc_session_configure_usage (self, session, gst_vtenc_get_usage (self));
gst_vtenc_session_configure_expected_framerate (self, session,
(gdouble) self->negotiated_fps_n / (gdouble) self->negotiated_fps_d);
gst_vtenc_session_configure_expected_duration (self, session,
(gdouble) self->negotiated_fps_d / (gdouble) self->negotiated_fps_n);
status = vt->VTCompressionSessionSetProperty (session,
*(vt->kVTCompressionPropertyKey_ProfileLevel),
*(vt->kVTProfileLevel_H264_Baseline_3_0));
GST_DEBUG_OBJECT (self, "kVTCompressionPropertyKey_ProfileLevel => %d",
status);
status = vt->VTCompressionSessionSetProperty (session,
*(vt->kVTCompressionPropertyKey_AllowTemporalCompression),
kCFBooleanTrue);
GST_DEBUG_OBJECT (self,
"kVTCompressionPropertyKey_AllowTemporalCompression => %d", status);
gst_vtenc_session_configure_max_keyframe_interval (self, session, 0);
gst_vtenc_session_configure_max_keyframe_interval_duration (self, session,
G_MAXDOUBLE);
gst_vtenc_session_configure_bitrate (self, session,
gst_vtenc_get_bitrate (self));
beach:
CFRelease (pb_attrs);
return session;
}
static void
gst_vtenc_destroy_session (GstVTEnc * self, VTCompressionSessionRef * session)
{
self->ctx->vt->VTCompressionSessionInvalidate (*session);
if (*session != NULL) {
CFRelease (*session);
*session = NULL;
}
}
typedef struct
{
GstVTEnc *self;
GstVTApi *vt;
VTCompressionSessionRef session;
} GstVTDumpPropCtx;
static void
gst_vtenc_session_dump_property (CFStringRef prop_name,
CFDictionaryRef prop_attrs, GstVTDumpPropCtx * dpc)
{
gchar *name_str;
CFTypeRef prop_value;
VTStatus status;
name_str = gst_vtutil_string_to_utf8 (prop_name);
if (dpc->self->dump_attributes) {
gchar *attrs_str;
attrs_str = gst_vtutil_object_to_string (prop_attrs);
GST_DEBUG_OBJECT (dpc->self, "%s = %s", name_str, attrs_str);
g_free (attrs_str);
}
status = dpc->vt->VTCompressionSessionCopyProperty (dpc->session, prop_name,
NULL, &prop_value);
if (status == kVTSuccess) {
gchar *value_str;
value_str = gst_vtutil_object_to_string (prop_value);
GST_DEBUG_OBJECT (dpc->self, "%s = %s", name_str, value_str);
g_free (value_str);
if (prop_value != NULL)
CFRelease (prop_value);
} else {
GST_DEBUG_OBJECT (dpc->self, "%s = <failed to query: %d>",
name_str, status);
}
g_free (name_str);
}
static void
gst_vtenc_session_dump_properties (GstVTEnc * self,
VTCompressionSessionRef session)
{
GstVTDumpPropCtx dpc = { self, self->ctx->vt, session };
CFDictionaryRef dict;
VTStatus status;
status = self->ctx->vt->VTCompressionSessionCopySupportedPropertyDictionary
(session, &dict);
if (status != kVTSuccess)
goto error;
CFDictionaryApplyFunction (dict,
(CFDictionaryApplierFunction) gst_vtenc_session_dump_property, &dpc);
CFRelease (dict);
return;
error:
GST_WARNING_OBJECT (self, "failed to dump properties");
}
static void
gst_vtenc_session_configure_usage (GstVTEnc * self,
VTCompressionSessionRef session, gint usage)
{
gst_vtenc_session_configure_property_int (self, session,
*(self->ctx->vt->kVTCompressionPropertyKey_Usage), usage);
}
static void
gst_vtenc_session_configure_expected_framerate (GstVTEnc * self,
VTCompressionSessionRef session, gdouble framerate)
{
gst_vtenc_session_configure_property_double (self, session,
*(self->ctx->vt->kVTCompressionPropertyKey_ExpectedFrameRate), framerate);
}
static void
gst_vtenc_session_configure_expected_duration (GstVTEnc * self,
VTCompressionSessionRef session, gdouble duration)
{
gst_vtenc_session_configure_property_double (self, session,
*(self->ctx->vt->kVTCompressionPropertyKey_ExpectedDuration), duration);
}
static void
gst_vtenc_session_configure_max_keyframe_interval (GstVTEnc * self,
VTCompressionSessionRef session, gint interval)
{
gst_vtenc_session_configure_property_int (self, session,
*(self->ctx->vt->kVTCompressionPropertyKey_MaxKeyFrameInterval),
interval);
}
static void
gst_vtenc_session_configure_max_keyframe_interval_duration (GstVTEnc * self,
VTCompressionSessionRef session, gdouble duration)
{
gst_vtenc_session_configure_property_double (self, session,
*(self->ctx->vt->kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration),
duration);
}
static void
gst_vtenc_session_configure_bitrate (GstVTEnc * self,
VTCompressionSessionRef session, guint bitrate)
{
gst_vtenc_session_configure_property_int (self, session,
*(self->ctx->vt->kVTCompressionPropertyKey_AverageDataRate), bitrate);
}
static VTStatus
gst_vtenc_session_configure_property_int (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gint value)
{
CFNumberRef num;
VTStatus status;
gchar name_str[128];
num = CFNumberCreate (NULL, kCFNumberIntType, &value);
status = self->ctx->vt->VTCompressionSessionSetProperty (session, name, num);
CFRelease (num);
CFStringGetCString (name, name_str, sizeof (name_str), kCFStringEncodingUTF8);
GST_DEBUG_OBJECT (self, "%s(%d) => %d", name_str, value, status);
return status;
}
static VTStatus
gst_vtenc_session_configure_property_double (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gdouble value)
{
CFNumberRef num;
VTStatus status;
gchar name_str[128];
num = CFNumberCreate (NULL, kCFNumberDoubleType, &value);
status = self->ctx->vt->VTCompressionSessionSetProperty (session, name, num);
CFRelease (num);
CFStringGetCString (name, name_str, sizeof (name_str), kCFStringEncodingUTF8);
GST_DEBUG_OBJECT (self, "%s(%f) => %d", name_str, value, status);
return status;
}
static GstFlowReturn
gst_vtenc_encode_frame (GstVTEnc * self, GstBuffer * buf)
{
GstVTApi *vt = self->ctx->vt;
CMTime ts, duration;
GstCoreMediaMeta *meta;
CVPixelBufferRef pbuf = NULL;
VTStatus vt_status;
GstFlowReturn ret = GST_FLOW_OK;
guint i;
self->cur_inbuf = buf;
ts = CMTimeMake
(GST_TIME_AS_MSECONDS (GST_BUFFER_TIMESTAMP (buf)), 1000);
duration = CMTimeMake
(GST_TIME_AS_MSECONDS (GST_BUFFER_DURATION (buf)), 1000);
meta = gst_buffer_get_core_media_meta (buf);
if (meta != NULL) {
pbuf = gst_core_media_buffer_get_pixel_buffer (buf);
}
if (pbuf == NULL) {
GstVTEncFrame *frame;
CVReturn cv_ret;
frame = gst_vtenc_frame_new (buf);
cv_ret = CVPixelBufferCreateWithBytes (NULL,
self->negotiated_width, self->negotiated_height,
kCVPixelFormatType_422YpCbCr8, frame->map.data,
self->negotiated_width * 2,
(CVPixelBufferReleaseBytesCallback) gst_vtenc_frame_free, frame,
NULL, &pbuf);
if (cv_ret != kCVReturnSuccess) {
gst_vtenc_frame_free (frame);
goto cv_error;
}
}
GST_OBJECT_LOCK (self);
self->expect_keyframe = CFDictionaryContainsKey (self->options,
*(vt->kVTEncodeFrameOptionKey_ForceKeyFrame));
if (self->expect_keyframe)
gst_vtenc_clear_cached_caps_downstream (self);
vt_status = self->ctx->vt->VTCompressionSessionEncodeFrame (self->session,
pbuf, ts, duration, self->options, NULL, NULL);
if (vt_status != 0) {
GST_WARNING_OBJECT (self, "VTCompressionSessionEncodeFrame returned %d",
vt_status);
}
self->ctx->vt->VTCompressionSessionCompleteFrames (self->session,
kCMTimeInvalid);
GST_OBJECT_UNLOCK (self);
CVPixelBufferRelease (pbuf);
self->cur_inbuf = NULL;
gst_buffer_unref (buf);
if (self->cur_outbufs->len > 0) {
meta =
gst_buffer_get_core_media_meta (g_ptr_array_index (self->cur_outbufs,
0));
if (!gst_vtenc_negotiate_downstream (self, meta->sample_buf))
ret = GST_FLOW_NOT_NEGOTIATED;
}
for (i = 0; i != self->cur_outbufs->len; i++) {
GstBuffer *buf = g_ptr_array_index (self->cur_outbufs, i);
if (ret == GST_FLOW_OK) {
ret = gst_pad_push (self->srcpad, buf);
} else {
gst_buffer_unref (buf);
}
}
g_ptr_array_set_size (self->cur_outbufs, 0);
return ret;
cv_error:
{
self->cur_inbuf = NULL;
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
static VTStatus
gst_vtenc_enqueue_buffer (void *data, int a2, int a3, int a4,
CMSampleBufferRef sbuf, int a6, int a7)
{
GstVTEnc *self = data;
gboolean is_keyframe;
GstBuffer *buf;
/* This may happen if we don't have enough bitrate */
if (sbuf == NULL)
goto beach;
is_keyframe = gst_vtenc_buffer_is_keyframe (self, sbuf);
if (self->expect_keyframe) {
if (!is_keyframe)
goto beach;
CFDictionaryRemoveValue (self->options,
*(self->ctx->vt->kVTEncodeFrameOptionKey_ForceKeyFrame));
}
self->expect_keyframe = FALSE;
buf = gst_core_media_buffer_new (sbuf);
gst_buffer_copy_into (buf, self->cur_inbuf, GST_BUFFER_COPY_TIMESTAMPS,
0, -1);
if (is_keyframe) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
} else {
GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_DISCONT);
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
}
g_ptr_array_add (self->cur_outbufs, buf);
beach:
return kVTSuccess;
}
static gboolean
gst_vtenc_buffer_is_keyframe (GstVTEnc * self, CMSampleBufferRef sbuf)
{
gboolean result = FALSE;
CFArrayRef attachments_for_sample;
attachments_for_sample =
CMSampleBufferGetSampleAttachmentsArray (sbuf, 0);
if (attachments_for_sample != NULL) {
CFDictionaryRef attachments;
CFBooleanRef depends_on_others;
attachments = CFArrayGetValueAtIndex (attachments_for_sample, 0);
depends_on_others = CFDictionaryGetValue (attachments,
kCMSampleAttachmentKey_DependsOnOthers);
result = (depends_on_others == kCFBooleanFalse);
}
return result;
}
static GstVTEncFrame *
gst_vtenc_frame_new (GstBuffer * buf)
{
GstVTEncFrame *frame;
frame = g_slice_new (GstVTEncFrame);
frame->buf = gst_buffer_ref (buf);
gst_buffer_map (buf, &frame->map, GST_MAP_READ);
return frame;
}
static void
gst_vtenc_frame_free (GstVTEncFrame * frame)
{
gst_buffer_unmap (frame->buf, &frame->map);
gst_buffer_unref (frame->buf);
g_slice_free (GstVTEncFrame, frame);
}
static void
gst_vtenc_register (GstPlugin * plugin,
const GstVTEncoderDetails * codec_details)
{
GTypeInfo type_info = {
sizeof (GstVTEncClass),
(GBaseInitFunc) gst_vtenc_base_init,
NULL,
(GClassInitFunc) gst_vtenc_class_init,
NULL,
NULL,
sizeof (GstVTEncClass),
0,
(GInstanceInitFunc) gst_vtenc_init,
};
gchar *type_name;
GType type;
gboolean result;
type_name = g_strdup_printf ("vtenc_%s", codec_details->element_name);
type = g_type_register_static (GST_TYPE_ELEMENT, type_name, &type_info, 0);
g_type_set_qdata (type, GST_VTENC_CODEC_DETAILS_QDATA,
(gpointer) codec_details);
result = gst_element_register (plugin, type_name, GST_RANK_NONE, type);
if (!result) {
GST_ERROR_OBJECT (plugin, "failed to register element %s", type_name);
}
g_free (type_name);
}
static const GstVTEncoderDetails gst_vtenc_codecs[] = {
{"H.264", "h264", "video/x-h264", kVTFormatH264},
};
void
gst_vtenc_register_elements (GstPlugin * plugin)
{
guint i;
GST_DEBUG_CATEGORY_INIT (gst_vtenc_debug, "vtenc",
0, "Apple VideoToolbox Encoder Wrapper");
for (i = 0; i != G_N_ELEMENTS (gst_vtenc_codecs); i++)
gst_vtenc_register (plugin, &gst_vtenc_codecs[i]);
}