gstreamer/sys/applemedia/vtenc.c

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/*
2013-02-16 01:44:19 +00:00
* Copyright (C) 2010, 2013 Ole André Vadla Ravnås <oleavr@soundrop.com>
* Copyright (C) 2013 Intel Corporation
*
* 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
};
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typedef struct _GstVTEncFrame GstVTEncFrame;
struct _GstVTEncFrame
{
GstBuffer *buf;
GstVideoFrame videoframe;
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};
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 gboolean gst_vtenc_start (GstVideoEncoder * enc);
static gboolean gst_vtenc_stop (GstVideoEncoder * enc);
static gboolean gst_vtenc_set_format (GstVideoEncoder * enc,
GstVideoCodecState * input_state);
static GstFlowReturn gst_vtenc_handle_frame (GstVideoEncoder * enc,
GstVideoCodecFrame * frame);
static GstFlowReturn gst_vtenc_finish (GstVideoEncoder * enc);
static void gst_vtenc_clear_cached_caps_downstream (GstVTEnc * self);
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_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 OSStatus gst_vtenc_session_configure_property_int (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gint value);
static OSStatus gst_vtenc_session_configure_property_double (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gdouble value);
static GstFlowReturn gst_vtenc_encode_frame (GstVTEnc * self,
GstVideoCodecFrame * frame);
static void gst_vtenc_enqueue_buffer (void *outputCallbackRefCon,
void *sourceFrameRefCon, OSStatus status, VTEncodeInfoFlags infoFlags,
CMSampleBufferRef sampleBuffer);
static gboolean gst_vtenc_buffer_is_keyframe (GstVTEnc * self,
CMSampleBufferRef sbuf);
static GstVTEncFrame *gst_vtenc_frame_new (GstBuffer * buf,
GstVideoInfo * videoinfo);
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static void gst_vtenc_frame_free (GstVTEncFrame * frame);
static void gst_pixel_buffer_release_cb (void *releaseRefCon,
const void *dataPtr, size_t dataSize, size_t numberOfPlanes,
const void *planeAddresses[]);
static GstStaticCaps sink_caps =
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ NV12, I420 }"));
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;
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gchar *longname, *description;
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longname = g_strdup_printf ("%s encoder", codec_details->name);
description = g_strdup_printf ("%s encoder", codec_details->name);
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gst_element_class_set_metadata (element_class, longname,
"Codec/Encoder/Video", description,
"Ole André Vadla Ravnås <oleavr@soundrop.com>, Dominik Röttsches <dominik.rottsches@intel.com>");
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g_free (longname);
g_free (description);
sink_template = gst_pad_template_new ("sink",
GST_PAD_SINK, GST_PAD_ALWAYS, gst_static_caps_get (&sink_caps));
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 == kCMVideoCodecType_H264) {
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;
GstVideoEncoderClass *gstvideoencoder_class;
gobject_class = (GObjectClass *) klass;
gstvideoencoder_class = (GstVideoEncoderClass *) 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;
gstvideoencoder_class->start = gst_vtenc_start;
gstvideoencoder_class->stop = gst_vtenc_stop;
gstvideoencoder_class->set_format = gst_vtenc_set_format;
gstvideoencoder_class->handle_frame = gst_vtenc_handle_frame;
gstvideoencoder_class->finish = gst_vtenc_finish;
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);
self->details = GST_VTENC_CLASS_GET_CODEC_DETAILS (klass);
/* These could be controlled by properties later */
self->dump_properties = FALSE;
self->dump_attributes = FALSE;
self->session = NULL;
}
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_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_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 gboolean
gst_vtenc_start (GstVideoEncoder * enc)
{
GstVTEnc *self = GST_VTENC_CAST (enc);
self->cur_outframes = g_async_queue_new ();
return TRUE;
}
static gboolean
gst_vtenc_stop (GstVideoEncoder * enc)
{
GstVTEnc *self = GST_VTENC_CAST (enc);
GST_OBJECT_LOCK (self);
gst_vtenc_destroy_session (self, &self->session);
if (self->options != NULL) {
CFRelease (self->options);
self->options = NULL;
}
if (self->input_state)
gst_video_codec_state_unref (self->input_state);
self->input_state = NULL;
self->negotiated_width = self->negotiated_height = 0;
self->negotiated_fps_n = self->negotiated_fps_d = 0;
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gst_vtenc_clear_cached_caps_downstream (self);
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GST_OBJECT_UNLOCK (self);
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g_async_queue_unref (self->cur_outframes);
self->cur_outframes = NULL;
return TRUE;
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}
static gboolean
gst_vtenc_set_format (GstVideoEncoder * enc, GstVideoCodecState * state)
{
GstVTEnc *self = GST_VTENC_CAST (enc);
VTCompressionSessionRef session;
GST_OBJECT_LOCK (self);
if (self->input_state)
gst_video_codec_state_unref (self->input_state);
self->input_state = gst_video_codec_state_ref (state);
self->negotiated_width = state->info.width;
self->negotiated_height = state->info.height;
self->negotiated_fps_n = state->info.fps_n;
self->negotiated_fps_d = state->info.fps_d;
self->video_info = state->info;
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);
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;
GstVideoCodecState *state;
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_pad_get_pad_template_caps (GST_VIDEO_ENCODER_SRC_PAD (self));
caps = gst_caps_make_writable (caps);
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 == kCMVideoCodecType_H264) {
CMFormatDescriptionRef fmt;
CFDictionaryRef atoms;
CFStringRef avccKey;
CFDataRef avcc;
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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);
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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);
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gst_structure_set (s, "codec_data", GST_TYPE_BUFFER, codec_data_buf, NULL);
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gst_buffer_unref (codec_data_buf);
}
state =
gst_video_encoder_set_output_state (GST_VIDEO_ENCODER_CAST (self), caps,
self->input_state);
gst_video_codec_state_unref (state);
result = gst_video_encoder_negotiate (GST_VIDEO_ENCODER_CAST (self));
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_handle_frame (GstVideoEncoder * enc, GstVideoCodecFrame * frame)
{
GstVTEnc *self = GST_VTENC_CAST (enc);
if (!gst_vtenc_is_negotiated (self))
goto not_negotiated;
return gst_vtenc_encode_frame (self, frame);
not_negotiated:
gst_video_codec_frame_unref (frame);
return GST_FLOW_NOT_NEGOTIATED;
}
static GstFlowReturn
gst_vtenc_finish (GstVideoEncoder * enc)
{
GstVTEnc *self = GST_VTENC_CAST (enc);
GstFlowReturn ret = GST_FLOW_OK;
OSStatus vt_status;
vt_status =
VTCompressionSessionCompleteFrames (self->session,
kCMTimePositiveInfinity);
if (vt_status != noErr) {
GST_WARNING_OBJECT (self, "VTCompressionSessionCompleteFrames returned %d",
(int) vt_status);
}
while (g_async_queue_length (self->cur_outframes) > 0) {
GstVideoCodecFrame *outframe = g_async_queue_try_pop (self->cur_outframes);
ret =
gst_video_encoder_finish_frame (GST_VIDEO_ENCODER_CAST (self),
outframe);
}
return ret;
}
static VTCompressionSessionRef
gst_vtenc_create_session (GstVTEnc * self)
{
VTCompressionSessionRef session = NULL;
CFMutableDictionaryRef pb_attrs;
OSStatus status;
pb_attrs = CFDictionaryCreateMutable (NULL, 0, &kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
gst_vtutil_dict_set_i32 (pb_attrs, kCVPixelBufferWidthKey,
self->negotiated_width);
gst_vtutil_dict_set_i32 (pb_attrs, kCVPixelBufferHeightKey,
self->negotiated_height);
status = VTCompressionSessionCreate (NULL,
self->negotiated_width, self->negotiated_height,
self->details->format_id, NULL, pb_attrs, NULL, gst_vtenc_enqueue_buffer,
self, &session);
GST_INFO_OBJECT (self, "VTCompressionSessionCreate for %d x %d => %d",
self->negotiated_width, self->negotiated_height, (int) status);
if (status != noErr) {
GST_ERROR_OBJECT (self, "VTCompressionSessionCreate() returned: %d",
(int) status);
goto beach;
}
if (self->dump_properties) {
gst_vtenc_session_dump_properties (self, session);
self->dump_properties = FALSE;
}
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 = VTSessionSetProperty (session,
kVTCompressionPropertyKey_ProfileLevel,
kVTProfileLevel_H264_Baseline_3_0);
GST_DEBUG_OBJECT (self, "kVTCompressionPropertyKey_ProfileLevel => %d",
(int) status);
status = VTSessionSetProperty (session,
kVTCompressionPropertyKey_AllowTemporalCompression, kCFBooleanTrue);
GST_DEBUG_OBJECT (self,
"kVTCompressionPropertyKey_AllowTemporalCompression => %d", (int) 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));
status = VTCompressionSessionPrepareToEncodeFrames (session);
if (status != noErr) {
GST_ERROR_OBJECT (self,
"VTCompressionSessionPrepareToEncodeFrames() returned: %d",
(int) status);
}
beach:
CFRelease (pb_attrs);
return session;
}
static void
gst_vtenc_destroy_session (GstVTEnc * self, VTCompressionSessionRef * session)
{
VTCompressionSessionInvalidate (*session);
if (*session != NULL) {
CFRelease (*session);
*session = NULL;
}
}
typedef struct
{
GstVTEnc *self;
VTCompressionSessionRef session;
} GstVTDumpPropCtx;
static void
gst_vtenc_session_dump_property (CFStringRef prop_name,
CFDictionaryRef prop_attrs, GstVTDumpPropCtx * dpc)
{
gchar *name_str;
CFTypeRef prop_value;
OSStatus 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 = VTSessionCopyProperty (dpc->session, prop_name, NULL, &prop_value);
if (status == noErr) {
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, (int) status);
}
g_free (name_str);
}
static void
gst_vtenc_session_dump_properties (GstVTEnc * self,
VTCompressionSessionRef session)
{
GstVTDumpPropCtx dpc = { self, session };
CFDictionaryRef dict;
OSStatus status;
status = VTSessionCopySupportedPropertyDictionary (session, &dict);
if (status != noErr)
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_expected_framerate (GstVTEnc * self,
VTCompressionSessionRef session, gdouble framerate)
{
gst_vtenc_session_configure_property_double (self, session,
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,
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,
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,
kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration, duration);
}
static void
gst_vtenc_session_configure_bitrate (GstVTEnc * self,
VTCompressionSessionRef session, guint bitrate)
{
gst_vtenc_session_configure_property_int (self, session,
kVTCompressionPropertyKey_AverageBitRate, bitrate);
}
static OSStatus
gst_vtenc_session_configure_property_int (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gint value)
{
CFNumberRef num;
OSStatus status;
gchar name_str[128];
num = CFNumberCreate (NULL, kCFNumberIntType, &value);
status = VTSessionSetProperty (session, name, num);
CFRelease (num);
CFStringGetCString (name, name_str, sizeof (name_str), kCFStringEncodingUTF8);
GST_DEBUG_OBJECT (self, "%s(%d) => %d", name_str, value, (int) status);
return status;
}
static OSStatus
gst_vtenc_session_configure_property_double (GstVTEnc * self,
VTCompressionSessionRef session, CFStringRef name, gdouble value)
{
CFNumberRef num;
OSStatus status;
gchar name_str[128];
num = CFNumberCreate (NULL, kCFNumberDoubleType, &value);
status = VTSessionSetProperty (session, name, num);
CFRelease (num);
CFStringGetCString (name, name_str, sizeof (name_str), kCFStringEncodingUTF8);
GST_DEBUG_OBJECT (self, "%s(%f) => %d", name_str, value, (int) status);
return status;
}
static GstFlowReturn
gst_vtenc_encode_frame (GstVTEnc * self, GstVideoCodecFrame * frame)
{
CMTime ts, duration;
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GstCoreMediaMeta *meta;
CVPixelBufferRef pbuf = NULL;
OSStatus vt_status;
GstFlowReturn ret = GST_FLOW_OK;
guint i;
if (GST_VIDEO_CODEC_FRAME_IS_FORCE_KEYFRAME (frame)) {
GST_OBJECT_LOCK (self);
if (self->options != NULL) {
GST_INFO_OBJECT (self, "received PLI, will force intra");
CFDictionaryAddValue (self->options,
kVTEncodeFrameOptionKey_ForceKeyFrame, kCFBooleanTrue);
} else {
GST_INFO_OBJECT (self,
"received PLI but encode not yet started, ignoring");
}
GST_OBJECT_UNLOCK (self);
}
ts = CMTimeMake (frame->pts, GST_SECOND);
if (frame->duration != GST_CLOCK_TIME_NONE)
duration = CMTimeMake (frame->duration, GST_SECOND);
else
duration = kCMTimeInvalid;
meta = gst_buffer_get_core_media_meta (frame->input_buffer);
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if (meta != NULL) {
pbuf = gst_core_media_buffer_get_pixel_buffer (frame->input_buffer);
}
if (pbuf == NULL) {
GstVTEncFrame *vframe;
CVReturn cv_ret;
vframe = gst_vtenc_frame_new (frame->input_buffer, &self->video_info);
if (!vframe)
goto cv_error;
{
const size_t num_planes = GST_VIDEO_FRAME_N_PLANES (&vframe->videoframe);
void *plane_base_addresses[GST_VIDEO_MAX_PLANES];
size_t plane_widths[GST_VIDEO_MAX_PLANES];
size_t plane_heights[GST_VIDEO_MAX_PLANES];
size_t plane_bytes_per_row[GST_VIDEO_MAX_PLANES];
OSType pixel_format_type;
size_t i;
for (i = 0; i < num_planes; i++) {
plane_base_addresses[i] =
GST_VIDEO_FRAME_PLANE_DATA (&vframe->videoframe, i);
plane_widths[i] = GST_VIDEO_FRAME_COMP_WIDTH (&vframe->videoframe, i);
plane_heights[i] = GST_VIDEO_FRAME_COMP_HEIGHT (&vframe->videoframe, i);
plane_bytes_per_row[i] =
GST_VIDEO_FRAME_COMP_STRIDE (&vframe->videoframe, i);
plane_bytes_per_row[i] =
GST_VIDEO_FRAME_COMP_STRIDE (&vframe->videoframe, i);
}
switch (GST_VIDEO_INFO_FORMAT (&self->video_info)) {
case GST_VIDEO_FORMAT_I420:
pixel_format_type = kCVPixelFormatType_420YpCbCr8Planar;
break;
case GST_VIDEO_FORMAT_NV12:
pixel_format_type = kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
break;
default:
goto cv_error;
}
cv_ret = CVPixelBufferCreateWithPlanarBytes (NULL,
self->negotiated_width, self->negotiated_height,
pixel_format_type,
frame,
GST_VIDEO_FRAME_SIZE (&vframe->videoframe),
num_planes,
plane_base_addresses,
plane_widths,
plane_heights,
plane_bytes_per_row, gst_pixel_buffer_release_cb, vframe, NULL,
&pbuf);
if (cv_ret != kCVReturnSuccess) {
gst_vtenc_frame_free (vframe);
goto cv_error;
}
2013-02-16 01:37:11 +00:00
}
}
GST_OBJECT_LOCK (self);
self->expect_keyframe = CFDictionaryContainsKey (self->options,
kVTEncodeFrameOptionKey_ForceKeyFrame);
if (self->expect_keyframe)
gst_vtenc_clear_cached_caps_downstream (self);
vt_status = VTCompressionSessionEncodeFrame (self->session,
pbuf, ts, duration, self->options,
GINT_TO_POINTER (frame->system_frame_number), NULL);
if (vt_status != noErr) {
GST_WARNING_OBJECT (self, "VTCompressionSessionEncodeFrame returned %d",
(int) vt_status);
}
GST_OBJECT_UNLOCK (self);
gst_video_codec_frame_unref (frame);
CVPixelBufferRelease (pbuf);
i = 0;
while (g_async_queue_length (self->cur_outframes) > 0) {
GstVideoCodecFrame *outframe = g_async_queue_try_pop (self->cur_outframes);
/* Try to renegotiate once */
if (i == 0) {
meta = gst_buffer_get_core_media_meta (outframe->output_buffer);
if (!gst_vtenc_negotiate_downstream (self, meta->sample_buf)) {
ret = GST_FLOW_NOT_NEGOTIATED;
gst_video_codec_frame_unref (outframe);
break;
}
}
ret =
gst_video_encoder_finish_frame (GST_VIDEO_ENCODER_CAST (self),
outframe);
i++;
}
return ret;
cv_error:
{
gst_video_codec_frame_unref (frame);
return GST_FLOW_ERROR;
}
}
static void
gst_vtenc_enqueue_buffer (void *outputCallbackRefCon,
void *sourceFrameRefCon,
OSStatus status,
VTEncodeInfoFlags infoFlags, CMSampleBufferRef sampleBuffer)
{
GstVTEnc *self = outputCallbackRefCon;
gboolean is_keyframe;
GstVideoCodecFrame *frame;
if (status != noErr) {
GST_ELEMENT_ERROR (self, LIBRARY, ENCODE, (NULL), ("Failed to encode: %d",
(int) status));
goto beach;
}
/* This may happen if we don't have enough bitrate */
if (sampleBuffer == NULL)
goto beach;
is_keyframe = gst_vtenc_buffer_is_keyframe (self, sampleBuffer);
if (self->expect_keyframe) {
if (!is_keyframe)
goto beach;
CFDictionaryRemoveValue (self->options,
kVTEncodeFrameOptionKey_ForceKeyFrame);
}
self->expect_keyframe = FALSE;
frame =
gst_video_encoder_get_frame (GST_VIDEO_ENCODER_CAST (self),
GPOINTER_TO_INT (sourceFrameRefCon));
/* We are dealing with block buffers here, so we don't need
* to enable the use of the video meta API on the core media buffer */
frame->output_buffer = gst_core_media_buffer_new (sampleBuffer, FALSE);
g_async_queue_push (self->cur_outframes, frame);
beach:
return;
}
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;
}
2013-02-16 01:37:11 +00:00
static GstVTEncFrame *
gst_vtenc_frame_new (GstBuffer * buf, GstVideoInfo * video_info)
2013-02-16 01:37:11 +00:00
{
GstVTEncFrame *frame;
frame = g_slice_new (GstVTEncFrame);
frame->buf = gst_buffer_ref (buf);
if (!gst_video_frame_map (&frame->videoframe, video_info, buf, GST_MAP_READ)) {
gst_buffer_unref (frame->buf);
g_slice_free (GstVTEncFrame, frame);
return NULL;
}
2013-02-16 01:37:11 +00:00
return frame;
}
static void
gst_vtenc_frame_free (GstVTEncFrame * frame)
{
gst_video_frame_unmap (&frame->videoframe);
2013-02-16 01:37:11 +00:00
gst_buffer_unref (frame->buf);
g_slice_free (GstVTEncFrame, frame);
}
static void
gst_pixel_buffer_release_cb (void *releaseRefCon, const void *dataPtr,
size_t dataSize, size_t numberOfPlanes, const void *planeAddresses[])
{
GstVTEncFrame *frame = (GstVTEncFrame *) releaseRefCon;
gst_vtenc_frame_free (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 (GstVTEnc),
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_VIDEO_ENCODER, 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", kCMVideoCodecType_H264},
};
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]);
}