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gstreamer/subprojects/gst-plugins-bad/sys/applemedia/avsamplevideosink.m

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/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.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.
*/
/**
* SECTION:element-avsamplebufferlayersink
*
* avsamplebufferlayersink renders video frames to a CALayer that can placed
* inside a Core Animation render tree.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "avsamplevideosink.h"
GST_DEBUG_CATEGORY (gst_debug_av_sink);
#define GST_CAT_DEFAULT gst_debug_av_sink
static void gst_av_sample_video_sink_finalize (GObject * object);
static void gst_av_sample_video_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * param_spec);
static void gst_av_sample_video_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * param_spec);
static gboolean gst_av_sample_video_sink_start (GstBaseSink * bsink);
static gboolean gst_av_sample_video_sink_stop (GstBaseSink * bsink);
static void gst_av_sample_video_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end);
static gboolean gst_av_sample_video_sink_set_caps (GstBaseSink * bsink, GstCaps * caps);
static GstCaps * gst_av_sample_video_sink_get_caps (GstBaseSink * bsink, GstCaps * filter);
static GstFlowReturn gst_av_sample_video_sink_prepare (GstBaseSink * bsink,
GstBuffer * buf);
static GstFlowReturn gst_av_sample_video_sink_show_frame (GstVideoSink * bsink,
GstBuffer * buf);
static gboolean gst_av_sample_video_sink_propose_allocation (GstBaseSink * bsink,
GstQuery * query);
static GstStaticPadTemplate gst_av_sample_video_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ RGB, BGR, ARGB, BGRA, ABGR, RGBA, YUY2, UYVY, NV12, I420 }"))
);
enum
{
PROR_0,
PROP_FORCE_ASPECT_RATIO,
PROP_LAYER,
};
#define gst_av_sample_video_sink_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstAVSampleVideoSink, gst_av_sample_video_sink,
GST_TYPE_VIDEO_SINK, GST_DEBUG_CATEGORY_INIT (gst_debug_av_sink, "avsamplevideosink", 0,
"AV Sample Video Sink"));
static void
gst_av_sample_video_sink_class_init (GstAVSampleVideoSinkClass * klass)
{
GObjectClass *gobject_class;
GstBaseSinkClass *gstbasesink_class;
GstVideoSinkClass *gstvideosink_class;
GstElementClass *element_class;
gobject_class = (GObjectClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
gstvideosink_class = (GstVideoSinkClass *) klass;
element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_av_sample_video_sink_set_property;
gobject_class->get_property = gst_av_sample_video_sink_get_property;
g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
g_param_spec_boolean ("force-aspect-ratio",
"Force aspect ratio",
"When enabled, scaling will respect original aspect ratio", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LAYER,
g_param_spec_pointer ("layer", "CALayer",
"The CoreAnimation layer that can be placed in the render tree",
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_metadata (element_class, "AV Sample video sink",
"Sink/Video", "A videosink based on AVSampleBuffers",
"Matthew Waters <matthew@centricular.com>");
gst_element_class_add_static_pad_template (element_class, &gst_av_sample_video_sink_template);
gobject_class->finalize = gst_av_sample_video_sink_finalize;
gstbasesink_class->get_caps = gst_av_sample_video_sink_get_caps;
gstbasesink_class->set_caps = gst_av_sample_video_sink_set_caps;
gstbasesink_class->get_times = gst_av_sample_video_sink_get_times;
gstbasesink_class->prepare = gst_av_sample_video_sink_prepare;
gstbasesink_class->propose_allocation = gst_av_sample_video_sink_propose_allocation;
gstbasesink_class->stop = gst_av_sample_video_sink_stop;
gstbasesink_class->start = gst_av_sample_video_sink_start;
gstvideosink_class->show_frame =
GST_DEBUG_FUNCPTR (gst_av_sample_video_sink_show_frame);
}
static void
gst_av_sample_video_sink_init (GstAVSampleVideoSink * av_sink)
{
av_sink->keep_aspect_ratio = TRUE;
g_mutex_init (&av_sink->render_lock);
}
static void
gst_av_sample_video_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAVSampleVideoSink *av_sink;
g_return_if_fail (GST_IS_AV_SAMPLE_VIDEO_SINK (object));
av_sink = GST_AV_SAMPLE_VIDEO_SINK (object);
switch (prop_id) {
case PROP_FORCE_ASPECT_RATIO:
{
av_sink->keep_aspect_ratio = g_value_get_boolean (value);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_av_sample_video_sink_finalize (GObject * object)
{
GstAVSampleVideoSink *av_sink = GST_AV_SAMPLE_VIDEO_SINK (object);
__block gpointer layer = av_sink->layer;
if (layer) {
dispatch_async (dispatch_get_main_queue (), ^{
CFBridgingRelease(layer);
});
}
g_mutex_clear (&av_sink->render_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_av_sample_video_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAVSampleVideoSink *av_sink;
g_return_if_fail (GST_IS_AV_SAMPLE_VIDEO_SINK (object));
av_sink = GST_AV_SAMPLE_VIDEO_SINK (object);
switch (prop_id) {
case PROP_FORCE_ASPECT_RATIO:
g_value_set_boolean (value, av_sink->keep_aspect_ratio);
break;
case PROP_LAYER:
g_value_set_pointer (value, av_sink->layer);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_av_sample_video_sink_start (GstBaseSink * bsink)
{
GstAVSampleVideoSink *av_sink = GST_AV_SAMPLE_VIDEO_SINK (bsink);
if ([NSThread isMainThread]) {
AVSampleBufferDisplayLayer *layer = [[AVSampleBufferDisplayLayer alloc] init];
av_sink->layer = (__bridge_retained gpointer)layer;
if (av_sink->keep_aspect_ratio)
layer.videoGravity = AVLayerVideoGravityResizeAspect;
else
layer.videoGravity = AVLayerVideoGravityResize;
g_object_notify (G_OBJECT (av_sink), "layer");
} else {
dispatch_sync (dispatch_get_main_queue (), ^{
AVSampleBufferDisplayLayer *layer = [[AVSampleBufferDisplayLayer alloc] init];
av_sink->layer = (__bridge_retained gpointer)layer;
if (av_sink->keep_aspect_ratio)
layer.videoGravity = AVLayerVideoGravityResizeAspect;
else
layer.videoGravity = AVLayerVideoGravityResize;
g_object_notify (G_OBJECT (av_sink), "layer");
});
}
return TRUE;
}
/* with render lock */
static void
_stop_requesting_data (GstAVSampleVideoSink * av_sink)
{
if (av_sink->layer) {
if (av_sink->layer_requesting_data)
[GST_AV_SAMPLE_VIDEO_SINK_LAYER(av_sink) stopRequestingMediaData];
av_sink->layer_requesting_data = FALSE;
}
}
static gboolean
gst_av_sample_video_sink_stop (GstBaseSink * bsink)
{
GstAVSampleVideoSink *av_sink = GST_AV_SAMPLE_VIDEO_SINK (bsink);
if (av_sink->pool) {
gst_object_unref (av_sink->pool);
av_sink->pool = NULL;
}
if (av_sink->layer) {
g_mutex_lock (&av_sink->render_lock);
_stop_requesting_data (av_sink);
g_mutex_unlock (&av_sink->render_lock);
[GST_AV_SAMPLE_VIDEO_SINK_LAYER(av_sink) flushAndRemoveImage];
}
return TRUE;
}
static void
gst_av_sample_video_sink_get_times (GstBaseSink * bsink, GstBuffer * buf,
GstClockTime * start, GstClockTime * end)
{
GstAVSampleVideoSink *av_sink;
av_sink = GST_AV_SAMPLE_VIDEO_SINK (bsink);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
*start = GST_BUFFER_TIMESTAMP (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf))
*end = *start + GST_BUFFER_DURATION (buf);
else {
if (GST_VIDEO_INFO_FPS_N (&av_sink->info) > 0) {
*end = *start +
gst_util_uint64_scale_int (GST_SECOND,
GST_VIDEO_INFO_FPS_D (&av_sink->info),
GST_VIDEO_INFO_FPS_N (&av_sink->info));
}
}
}
}
static unsigned int
_cv_pixel_format_type_from_video_format (GstVideoFormat format)
{
switch (format) {
case GST_VIDEO_FORMAT_BGRA:
return kCVPixelFormatType_32BGRA;
case GST_VIDEO_FORMAT_ARGB:
return kCVPixelFormatType_32ARGB;
case GST_VIDEO_FORMAT_ABGR:
return kCVPixelFormatType_32ABGR;
case GST_VIDEO_FORMAT_RGBA:
return kCVPixelFormatType_32RGBA;
case GST_VIDEO_FORMAT_RGB:
return kCVPixelFormatType_24RGB;
case GST_VIDEO_FORMAT_BGR:
return kCVPixelFormatType_24BGR;
case GST_VIDEO_FORMAT_NV12:
return kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
case GST_VIDEO_FORMAT_I420:
return kCVPixelFormatType_420YpCbCr8Planar;
case GST_VIDEO_FORMAT_YUY2:
return kCVPixelFormatType_422YpCbCr8_yuvs;
case GST_VIDEO_FORMAT_UYVY:
return kCVPixelFormatType_422YpCbCr8;
default:
return 0;
}
}
static GstVideoFormat
_pixel_format_description_to_video_format (CFDictionaryRef attrs)
{
CFNumberRef id_ref;
unsigned int id;
id_ref = (CFNumberRef) CFDictionaryGetValue (attrs, kCVPixelFormatConstant);
CFNumberGetValue (id_ref, kCFNumberIntType, &id);
GST_TRACE ("pixel format description id %u", id);
CFRelease (id_ref);
switch (id) {
case kCVPixelFormatType_32BGRA:
return GST_VIDEO_FORMAT_BGRA;
case kCVPixelFormatType_32ARGB:
return GST_VIDEO_FORMAT_ARGB;
case kCVPixelFormatType_32ABGR:
return GST_VIDEO_FORMAT_ABGR;
case kCVPixelFormatType_32RGBA:
return GST_VIDEO_FORMAT_RGBA;
case kCVPixelFormatType_24RGB:
return GST_VIDEO_FORMAT_RGB;
case kCVPixelFormatType_24BGR:
return GST_VIDEO_FORMAT_BGR;
case kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange:
return GST_VIDEO_FORMAT_NV12;
case kCVPixelFormatType_420YpCbCr8Planar:
return GST_VIDEO_FORMAT_I420;
case kCVPixelFormatType_422YpCbCr8_yuvs:
return GST_VIDEO_FORMAT_YUY2;
case kCVPixelFormatType_422YpCbCr8:
return GST_VIDEO_FORMAT_UYVY;
default:
return GST_VIDEO_FORMAT_UNKNOWN;
}
}
static GstCaps *
gst_av_sample_video_sink_get_caps (GstBaseSink * bsink, GstCaps * filter)
{
GstAVSampleVideoSink *av_sink = GST_AV_SAMPLE_VIDEO_SINK (bsink);
CFArrayRef formats;
GstCaps *ret, *tmp;
int i, n;
formats =
CVPixelFormatDescriptionArrayCreateWithAllPixelFormatTypes
(kCFAllocatorDefault);
ret = gst_caps_new_empty ();
n = CFArrayGetCount (formats);
for (i = 0; i < n; i++) {
CFDictionaryRef attrs;
CFNumberRef fourcc;
unsigned int pixel_format;
GstVideoFormat v_format;
const char *format_str;
char *caps_str;
fourcc = (CFNumberRef)CFArrayGetValueAtIndex(formats, i);
CFNumberGetValue (fourcc, kCFNumberIntType, &pixel_format);
attrs = CVPixelFormatDescriptionCreateWithPixelFormatType (kCFAllocatorDefault,
pixel_format);
CFRelease (fourcc);
v_format = _pixel_format_description_to_video_format (attrs);
if (v_format != GST_VIDEO_FORMAT_UNKNOWN) {
format_str = gst_video_format_to_string (v_format);
caps_str = g_strdup_printf ("video/x-raw, format=%s", format_str);
ret = gst_caps_merge (ret, gst_caps_from_string (caps_str));
g_free (caps_str);
}
CFRelease (attrs);
}
ret = gst_caps_simplify (ret);
gst_caps_set_simple (ret, "width", GST_TYPE_INT_RANGE, 0, G_MAXINT, "height",
GST_TYPE_INT_RANGE, 0, G_MAXINT, "framerate", GST_TYPE_FRACTION_RANGE, 0,
1, G_MAXINT, 1, NULL);
GST_DEBUG_OBJECT (av_sink, "returning caps %" GST_PTR_FORMAT, ret);
if (filter) {
tmp = gst_caps_intersect_full (ret, filter, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (ret);
ret = tmp;
}
CFRelease (formats);
return ret;
}
static gboolean
gst_av_sample_video_sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstAVSampleVideoSink *av_sink;
gint width;
gint height;
gboolean ok;
gint par_n, par_d;
gint display_par_n, display_par_d;
guint display_ratio_num, display_ratio_den;
GstVideoInfo vinfo;
GstStructure *structure;
GstBufferPool *newpool, *oldpool;
GST_DEBUG_OBJECT (bsink, "set caps with %" GST_PTR_FORMAT, caps);
av_sink = GST_AV_SAMPLE_VIDEO_SINK (bsink);
ok = gst_video_info_from_caps (&vinfo, caps);
if (!ok)
return FALSE;
width = GST_VIDEO_INFO_WIDTH (&vinfo);
height = GST_VIDEO_INFO_HEIGHT (&vinfo);
par_n = GST_VIDEO_INFO_PAR_N (&vinfo);
par_d = GST_VIDEO_INFO_PAR_D (&vinfo);
if (!par_n)
par_n = 1;
display_par_n = 1;
display_par_d = 1;
ok = gst_video_calculate_display_ratio (&display_ratio_num,
&display_ratio_den, width, height, par_n, par_d, display_par_n,
display_par_d);
if (!ok)
return FALSE;
GST_TRACE_OBJECT (bsink, "PAR: %u/%u DAR:%u/%u", par_n, par_d, display_par_n,
display_par_d);
if (height % display_ratio_den == 0) {
GST_DEBUG_OBJECT (bsink, "keeping video height");
GST_VIDEO_SINK_WIDTH (av_sink) = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
GST_VIDEO_SINK_HEIGHT (av_sink) = height;
} else if (width % display_ratio_num == 0) {
GST_DEBUG_OBJECT (bsink, "keeping video width");
GST_VIDEO_SINK_WIDTH (av_sink) = width;
GST_VIDEO_SINK_HEIGHT (av_sink) = (guint)
gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num);
} else {
GST_DEBUG_OBJECT (bsink, "approximating while keeping video height");
GST_VIDEO_SINK_WIDTH (av_sink) = (guint)
gst_util_uint64_scale_int (height, display_ratio_num,
display_ratio_den);
GST_VIDEO_SINK_HEIGHT (av_sink) = height;
}
GST_DEBUG_OBJECT (bsink, "scaling to %dx%d", GST_VIDEO_SINK_WIDTH (av_sink),
GST_VIDEO_SINK_HEIGHT (av_sink));
av_sink->info = vinfo;
newpool = gst_video_buffer_pool_new ();
structure = gst_buffer_pool_get_config (newpool);
gst_buffer_pool_config_set_params (structure, caps, vinfo.size, 2, 0);
gst_buffer_pool_set_config (newpool, structure);
oldpool = av_sink->pool;
/* we don't activate the pool yet, this will be done by downstream after it
* has configured the pool. If downstream does not want our pool we will
* activate it when we render into it */
av_sink->pool = newpool;
/* unref the old sink */
if (oldpool) {
/* we don't deactivate, some elements might still be using it, it will
* be deactivated when the last ref is gone */
gst_object_unref (oldpool);
}
return TRUE;
}
static void
_unmap_planar_frame (GstVideoFrame * v_frame, const void * data, gsize dataSize,
gsize numberOfPlanes, const void *planeAddressed[])
{
GST_TRACE ("freeing video frame %p", v_frame);
gst_video_frame_unmap (v_frame);
g_free (v_frame);
}
static void
_unmap_frame (GstVideoFrame * v_frame, const void * data)
{
GST_TRACE ("freeing video frame %p", v_frame);
gst_video_frame_unmap (v_frame);
g_free (v_frame);
}
/* with render lock */
static gboolean
_enqueue_sample (GstAVSampleVideoSink * av_sink, GstBuffer *buf)
{
CVPixelBufferRef pbuf;
CMVideoFormatDescriptionRef v_format_desc;
GstVideoFrame *v_frame;
CMSampleTimingInfo sample_time;
__block CMSampleBufferRef sample_buf;
CFArrayRef sample_attachments;
gsize l, r, t, b;
gint i;
GST_TRACE_OBJECT (av_sink, "redisplay of size:%ux%u, window size:%ux%u",
GST_VIDEO_INFO_WIDTH (&av_sink->info),
GST_VIDEO_INFO_HEIGHT (&av_sink->info),
GST_VIDEO_SINK_WIDTH (av_sink),
GST_VIDEO_SINK_HEIGHT (av_sink));
v_frame = g_new0 (GstVideoFrame, 1);
if (!gst_video_frame_map (v_frame, &av_sink->info, buf, GST_MAP_READ)) {
GST_ERROR_OBJECT (av_sink, "Failed to map input video frame");
g_free (v_frame);
return FALSE;
}
if (GST_VIDEO_INFO_N_PLANES (&v_frame->info) == 1) {
/* single plane */
if (kCVReturnSuccess != CVPixelBufferCreateWithBytes (NULL,
GST_VIDEO_INFO_WIDTH (&v_frame->info),
GST_VIDEO_INFO_HEIGHT (&v_frame->info),
_cv_pixel_format_type_from_video_format (GST_VIDEO_INFO_FORMAT (&v_frame->info)),
v_frame->data[0], v_frame->info.stride[0],
(CVPixelBufferReleaseBytesCallback) _unmap_frame, v_frame, NULL,
&pbuf)) {
GST_ERROR_OBJECT (av_sink, "Error creating Core Video pixel buffer");
gst_video_frame_unmap (v_frame);
g_free (v_frame);
return FALSE;
}
} else {
/* multi-planar */
gsize widths[GST_VIDEO_MAX_PLANES] = { 0, };
gsize heights[GST_VIDEO_MAX_PLANES] = { 0, };
gsize strides[GST_VIDEO_MAX_PLANES] = { 0, };
gint i;
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&v_frame->info); i++) {
widths[i] = GST_VIDEO_INFO_COMP_WIDTH (&v_frame->info, i);
heights[i] = GST_VIDEO_INFO_COMP_HEIGHT (&v_frame->info, i);
strides[i] = GST_VIDEO_INFO_COMP_STRIDE (&v_frame->info, i);
}
if (kCVReturnSuccess != CVPixelBufferCreateWithPlanarBytes (NULL,
GST_VIDEO_INFO_WIDTH (&v_frame->info),
GST_VIDEO_INFO_HEIGHT (&v_frame->info),
_cv_pixel_format_type_from_video_format (GST_VIDEO_INFO_FORMAT (&v_frame->info)),
/* have to put something for these two parameters otherwise
* the callback is not called resulting in a big leak */
v_frame, v_frame->info.size,
GST_VIDEO_INFO_N_PLANES (&v_frame->info), v_frame->data,
widths, heights, strides,
(CVPixelBufferReleasePlanarBytesCallback) _unmap_planar_frame,
v_frame, NULL, &pbuf)) {
GST_ERROR_OBJECT (av_sink, "Error creating Core Video pixel buffer");
gst_video_frame_unmap (v_frame);
g_free (v_frame);
return FALSE;
}
}
CVPixelBufferLockBaseAddress (pbuf, kCVPixelBufferLock_ReadOnly);
CVPixelBufferGetExtendedPixels (pbuf, &l, &r, &t, &b);
GST_TRACE_OBJECT (av_sink, "CVPixelBuffer n_planes %u width %u height %u"
" data size %" G_GSIZE_FORMAT " extra pixels l %u r %u t %u b %u",
(guint) CVPixelBufferGetPlaneCount (pbuf),
(guint) CVPixelBufferGetWidth (pbuf),
(guint) CVPixelBufferGetHeight (pbuf),
CVPixelBufferGetDataSize (pbuf),
(guint) l, (guint) r, (guint) t, (guint) b);
GST_TRACE_OBJECT (av_sink, "GstVideoFrame n_planes %u width %u height %u"
" data size %"G_GSIZE_FORMAT " extra pixels l %u r %u t %u b %u",
GST_VIDEO_INFO_N_PLANES (&v_frame->info),
GST_VIDEO_INFO_WIDTH (&v_frame->info),
GST_VIDEO_INFO_HEIGHT (&v_frame->info),
v_frame->info.size, 0, 0, 0, 0);
if (GST_VIDEO_INFO_N_PLANES (&v_frame->info) > 1) {
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&v_frame->info); i++) {
GST_TRACE_OBJECT (av_sink, "plane %i CVPixelBuffer width %u height %u "
"stride %u data %p", i,
(guint) CVPixelBufferGetWidthOfPlane (pbuf, i),
(guint) CVPixelBufferGetHeightOfPlane (pbuf, i),
(guint) CVPixelBufferGetBytesPerRowOfPlane (pbuf, i),
CVPixelBufferGetBaseAddressOfPlane (pbuf, i));
GST_TRACE_OBJECT (av_sink, "plane %i GstVideoFrame width %u height %u "
"stride %u data %p", i,
GST_VIDEO_INFO_COMP_WIDTH (&v_frame->info, i),
GST_VIDEO_INFO_COMP_HEIGHT (&v_frame->info, i),
GST_VIDEO_INFO_COMP_STRIDE (&v_frame->info, i),
CVPixelBufferGetBaseAddressOfPlane (pbuf, i));
}
} else {
GST_TRACE_OBJECT (av_sink, "CVPixelBuffer attrs stride %u data %p",
(guint) CVPixelBufferGetBytesPerRow (pbuf),
CVPixelBufferGetBaseAddress (pbuf));
GST_TRACE_OBJECT (av_sink, "GstVideoFrame attrs stride %u data %p",
v_frame->info.stride[0], v_frame->data[0]);
}
CVPixelBufferUnlockBaseAddress (pbuf, kCVPixelBufferLock_ReadOnly);
if (0 != CMVideoFormatDescriptionCreateForImageBuffer (kCFAllocatorDefault,
pbuf, &v_format_desc)) {
GST_ERROR_OBJECT (av_sink, "Failed to retrieve video format from "
"pixel buffer");
CFRelease (pbuf);
return FALSE;
}
sample_time.duration = CMTimeMake (GST_BUFFER_DURATION (buf), GST_SECOND);
sample_time.presentationTimeStamp = CMTimeMake (GST_BUFFER_PTS (buf), GST_SECOND);
sample_time.decodeTimeStamp = kCMTimeInvalid;
if (0 != CMSampleBufferCreateForImageBuffer (kCFAllocatorDefault, pbuf, TRUE,
NULL, NULL, v_format_desc, &sample_time, &sample_buf)) {
GST_ERROR_OBJECT (av_sink, "Failed to create CMSampleBuffer from "
"CVImageBuffer");
CFRelease (v_format_desc);
CFRelease (pbuf);
return FALSE;
}
CFRelease (v_format_desc);
sample_attachments = CMSampleBufferGetSampleAttachmentsArray (sample_buf, TRUE);
for (i = 0; i < CFArrayGetCount (sample_attachments); i++) {
CFMutableDictionaryRef attachments =
(CFMutableDictionaryRef) CFArrayGetValueAtIndex (sample_attachments, i);
/* Until we slave the CoreMedia clock, just display everything ASAP */
CFDictionarySetValue (attachments, kCMSampleAttachmentKey_DisplayImmediately,
kCFBooleanTrue);
}
AVSampleBufferDisplayLayer *layer = GST_AV_SAMPLE_VIDEO_SINK_LAYER(av_sink);
if (av_sink->keep_aspect_ratio)
layer.videoGravity = AVLayerVideoGravityResizeAspect;
else
layer.videoGravity = AVLayerVideoGravityResize;
[layer enqueueSampleBuffer:sample_buf];
CFRelease (pbuf);
CFRelease (sample_buf);
return TRUE;
}
static void
_request_data (GstAVSampleVideoSink * av_sink)
{
av_sink->layer_requesting_data = TRUE;
AVSampleBufferDisplayLayer *layer = GST_AV_SAMPLE_VIDEO_SINK_LAYER(av_sink);
[layer requestMediaDataWhenReadyOnQueue:
dispatch_get_global_queue (DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
usingBlock:^{
while (TRUE) {
/* don't needlessly fill up avsamplebufferdisplaylayer's queue.
* This also allows us to skip displaying late frames */
if (!layer.readyForMoreMediaData)
break;
g_mutex_lock (&av_sink->render_lock);
if (!av_sink->buffer || av_sink->render_flow_return != GST_FLOW_OK) {
_stop_requesting_data (av_sink);
g_mutex_unlock (&av_sink->render_lock);
break;
}
if (!_enqueue_sample (av_sink, av_sink->buffer)) {
gst_buffer_unref (av_sink->buffer);
av_sink->buffer = NULL;
av_sink->render_flow_return = GST_FLOW_ERROR;
g_mutex_unlock (&av_sink->render_lock);
break;
}
gst_buffer_unref (av_sink->buffer);
av_sink->buffer = NULL;
av_sink->render_flow_return = GST_FLOW_OK;
g_mutex_unlock (&av_sink->render_lock);
}
}];
}
static GstFlowReturn
gst_av_sample_video_sink_prepare (GstBaseSink * bsink, GstBuffer * buf)
{
GstAVSampleVideoSink *av_sink;
av_sink = GST_AV_SAMPLE_VIDEO_SINK (bsink);
GST_LOG_OBJECT (bsink, "preparing buffer:%p", buf);
if (GST_VIDEO_SINK_WIDTH (av_sink) < 1 ||
GST_VIDEO_SINK_HEIGHT (av_sink) < 1) {
return GST_FLOW_NOT_NEGOTIATED;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_av_sample_video_sink_show_frame (GstVideoSink * vsink, GstBuffer * buf)
{
GstAVSampleVideoSink *av_sink;
GstFlowReturn ret;
GST_TRACE_OBJECT (vsink, "rendering buffer:%p", buf);
av_sink = GST_AV_SAMPLE_VIDEO_SINK (vsink);
g_mutex_lock (&av_sink->render_lock);
if (av_sink->buffer)
gst_buffer_unref (av_sink->buffer);
av_sink->buffer = gst_buffer_ref (buf);
ret = av_sink->render_flow_return;
if (!av_sink->layer_requesting_data)
_request_data (av_sink);
g_mutex_unlock (&av_sink->render_lock);
#if defined(MAC_OS_X_VERSION_MAX_ALLOWED) && \
MAC_OS_X_VERSION_MAX_ALLOWED >= 1010 && \
defined(MAC_OS_X_VERSION_MIN_REQUIRED) && \
MAC_OS_X_VERSION_MIN_REQUIRED <= MAC_OS_X_VERSION_10_4
AVSampleBufferDisplayLayer *layer = GST_AV_SAMPLE_VIDEO_SINK_LAYER(av_sink);
if ([layer status] == AVQueuedSampleBufferRenderingStatusFailed) {
GST_ERROR_OBJECT (av_sink, "failed to enqueue buffer on layer, %s",
[[[layer error] description] UTF8String]);
return GST_FLOW_ERROR;
}
#endif
return ret;
}
static gboolean
gst_av_sample_video_sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
{
GstAVSampleVideoSink *av_sink = GST_AV_SAMPLE_VIDEO_SINK (bsink);
GstBufferPool *pool;
GstStructure *config;
GstCaps *caps;
guint size;
gboolean need_pool;
gst_query_parse_allocation (query, &caps, &need_pool);
if (caps == NULL)
goto no_caps;
/* FIXME re-using buffer pool breaks renegotiation */
if ((pool = av_sink->pool))
gst_object_ref (pool);
if (pool != NULL) {
GstCaps *pcaps;
/* we had a pool, check caps */
GST_DEBUG_OBJECT (av_sink, "check existing pool caps");
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &pcaps, &size, NULL, NULL);
if (!gst_caps_is_equal (caps, pcaps)) {
GST_DEBUG_OBJECT (av_sink, "pool has different caps");
/* different caps, we can't use this pool */
gst_object_unref (pool);
pool = NULL;
}
gst_structure_free (config);
} else {
GstVideoInfo info;
if (!gst_video_info_from_caps (&info, caps))
goto invalid_caps;
/* the normal size of a frame */
size = info.size;
}
if (pool == NULL && need_pool) {
GST_DEBUG_OBJECT (av_sink, "create new pool");
pool = gst_video_buffer_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
if (!gst_buffer_pool_set_config (pool, config))
goto config_failed;
}
/* we need at least 2 buffer because we hold on to the last one */
gst_query_add_allocation_pool (query, pool, size, 2, 0);
if (pool)
gst_object_unref (pool);
/* we also support various metadata */
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, 0);
return TRUE;
/* ERRORS */
no_caps:
{
GST_DEBUG_OBJECT (bsink, "no caps specified");
return FALSE;
}
invalid_caps:
{
GST_DEBUG_OBJECT (bsink, "invalid caps specified");
return FALSE;
}
config_failed:
{
GST_DEBUG_OBJECT (bsink, "failed setting config");
return FALSE;
}
}
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