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Code Issues 1 Projects Releases Wiki Activity
gstreamer/sys/applemedia/avfassetsrc.m
Nick Kallen 46bbc60d24 applemedia/gl: Update code to use ARC 
All code interacting with Objective-C objects should now use Automated
Reference Counting rather than manual memory management or Garbage
Collection. Because ARC prohibits C-structs from containing
references to Objective-C objects, all such fields are now typed
'gpointer'. Setting and gettings Objective-C fields on such a
struct now uses explicit __bridge_* calls to tell ARC about
object lifetimes.

https://bugzilla.gnome.org/show_bug.cgi?id=777847
2017-03-07 13:37:07 +02:00

1110 lines
31 KiB
Objective-C
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/*
* GStreamer
* Copyright (C) 2013 Fluendo S.L. <support@fluendo.com>
* Authors: Andoni Morales Alastruey <amorales@fluendo.com>
* Copyright (C) 2014 Collabora Ltd.
* Authors: Matthieu Bouron <matthieu.bouron@collabora.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-plugin
*
* Read and decode samples from AVFoundation assets using the AVFAssetReader API
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 -v -m avfassetsrc uri="file://movie.mp4" ! autovideosink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "avfassetsrc.h"
#include "coremediabuffer.h"
GST_DEBUG_CATEGORY_STATIC (gst_avf_asset_src_debug);
#define GST_CAT_DEFAULT gst_avf_asset_src_debug
#define CMTIME_TO_GST_TIME(x) \
(x.value == 0 ? 0 : (guint64)(x.value * GST_SECOND / x.timescale));
#define GST_AVF_ASSET_SRC_LOCK(x) (g_mutex_lock (&x->lock));
#define GST_AVF_ASSET_SRC_UNLOCK(x) (g_mutex_unlock (&x->lock));
#define MEDIA_TYPE_TO_STR(x) \
(x == GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO ? "audio" : "video")
#define AVF_ASSET_READER_HAS_AUDIO(x) \
([GST_AVF_ASSET_SRC_READER(self) hasMediaType:GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO])
#define AVF_ASSET_READER_HAS_VIDEO(x) \
([GST_AVF_ASSET_SRC_READER(self) hasMediaType:GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO])
enum
{
PROP_0,
PROP_URI
};
static GstStaticPadTemplate audio_factory = GST_STATIC_PAD_TEMPLATE ("audio",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) F32LE, "
"rate = " GST_AUDIO_RATE_RANGE ", "
"channels = (int) [1, 2], "
"layout = (string) interleaved"
)
);
static GstStaticPadTemplate video_factory = GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("video/x-raw, "
"format = (string) NV12, "
"framerate = " GST_VIDEO_FPS_RANGE ", "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE
)
);
static void gst_avf_asset_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_avf_asset_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_avf_asset_src_dispose (GObject *object);
static GstStateChangeReturn gst_avf_asset_src_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_avf_asset_src_query (GstPad *pad, GstObject * parent, GstQuery *query);
static gboolean gst_avf_asset_src_event (GstPad *pad, GstObject * parent, GstEvent *event);
static gboolean gst_avf_asset_src_send_event (GstAVFAssetSrc *self,
GstEvent *event);
static void gst_avf_asset_src_read_audio (GstAVFAssetSrc *self);
static void gst_avf_asset_src_read_video (GstAVFAssetSrc *self);
static void gst_avf_asset_src_start (GstAVFAssetSrc *self);
static void gst_avf_asset_src_stop (GstAVFAssetSrc *self);
static gboolean gst_avf_asset_src_start_reading (GstAVFAssetSrc *self);
static void gst_avf_asset_src_stop_reading (GstAVFAssetSrc *self);
static void gst_avf_asset_src_stop_all (GstAVFAssetSrc *self);
static void gst_avf_asset_src_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static void
_do_init (GType avf_assetsrc_type)
{
static const GInterfaceInfo urihandler_info = {
gst_avf_asset_src_uri_handler_init,
NULL,
NULL
};
g_type_add_interface_static (avf_assetsrc_type, GST_TYPE_URI_HANDLER,
&urihandler_info);
GST_DEBUG_CATEGORY_INIT (gst_avf_asset_src_debug, "avfassetsrc",
0, "avfassetsrc element");
}
G_DEFINE_TYPE_WITH_CODE (GstAVFAssetSrc, gst_avf_asset_src, GST_TYPE_ELEMENT,
_do_init (g_define_type_id));
/* GObject vmethod implementations */
static void
gst_avf_asset_src_class_init (GstAVFAssetSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gst_element_class_set_static_metadata (gstelement_class,
"Source and decoder for AVFoundation assets",
"Source/Codec",
"Read and decode samples from AVFoundation assets using the AVFAssetReader API",
"Andoni Morales Alastruey amorales@fluendo.com");
gst_element_class_add_static_pad_template (gstelement_class, &audio_factory);
gst_element_class_add_static_pad_template (gstelement_class, &video_factory);
gobject_class->set_property = gst_avf_asset_src_set_property;
gobject_class->get_property = gst_avf_asset_src_get_property;
gobject_class->dispose = gst_avf_asset_src_dispose;
/**
* GstAVFAssetSrc:uri
*
* URI of the asset to read
*
**/
g_object_class_install_property (gobject_class, PROP_URI,
g_param_spec_string ("uri", "Asset URI",
"URI of the asset to read", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_READY));
gstelement_class->change_state = gst_avf_asset_src_change_state;
}
static void
gst_avf_asset_src_init (GstAVFAssetSrc * self)
{
self->selected_audio_track = 0;
self->selected_video_track = 0;
self->last_audio_pad_ret = GST_FLOW_OK;
self->last_video_pad_ret = GST_FLOW_OK;
g_mutex_init (&self->lock);
}
static void
gst_avf_asset_src_dispose (GObject *object)
{
GstAVFAssetSrc *self = GST_AVF_ASSET_SRC (object);
if (self->uri != NULL) {
g_free (self->uri);
self->uri = NULL;
}
if (self->seek_event) {
gst_event_unref (self->seek_event);
self->seek_event = NULL;
}
}
static void
gst_avf_asset_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAVFAssetSrc *self = GST_AVF_ASSET_SRC (object);
switch (prop_id) {
case PROP_URI:
g_free (self->uri);
self->uri = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_avf_asset_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAVFAssetSrc *self = GST_AVF_ASSET_SRC (object);
switch (prop_id) {
case PROP_URI:
g_value_set_string (value, self->uri);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_avf_asset_src_change_state (GstElement * element, GstStateChange transition)
{
GstAVFAssetSrc *self = GST_AVF_ASSET_SRC (element);
GstStateChangeReturn ret;
GError *error;
GST_DEBUG ("%s => %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY: {
self->state = GST_AVF_ASSET_SRC_STATE_STOPPED;
if (!self->uri) {
GST_ELEMENT_ERROR (element, RESOURCE, NOT_FOUND,
("\"uri\" property not set"), (NULL));
gst_avf_asset_src_stop_all (self);
return GST_STATE_CHANGE_FAILURE;
}
self->reader = (__bridge_retained gpointer)([[GstAVFAssetReader alloc] initWithURI:self->uri:&error]);
if (error) {
GST_ELEMENT_ERROR (element, RESOURCE, FAILED, ("AVFAssetReader error"),
("%s", error->message));
g_error_free (error);
gst_avf_asset_src_stop_all (self);
return GST_STATE_CHANGE_FAILURE;
}
break;
}
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_avf_asset_src_start (self);
gst_avf_asset_src_start_reading (self);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (gst_avf_asset_src_parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_avf_asset_src_stop_reading (self);
gst_avf_asset_src_stop (self);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
CFBridgingRelease(self->reader);
break;
default:
break;
}
return ret;
}
static GstCaps *
gst_avf_asset_src_get_caps(GstAVFAssetSrc * self, GstPad * pad, GstCaps * filter)
{
GstCaps * caps;
caps = gst_pad_get_current_caps (pad);
if (!caps) {
caps = gst_pad_get_pad_template_caps (pad);
}
if (filter) {
GstCaps *intersection = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = intersection;
}
return caps;
}
static gboolean
gst_avf_asset_src_query (GstPad *pad, GstObject * parent, GstQuery *query)
{
gboolean ret = FALSE;
GstCaps *caps;
GstAVFAssetSrc *self = GST_AVF_ASSET_SRC (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_URI:
gst_query_set_uri (query, self->uri);
ret = TRUE;
break;
case GST_QUERY_DURATION:
gst_query_set_duration (query, GST_FORMAT_TIME, GST_AVF_ASSET_SRC_READER(self).duration);
ret = TRUE;
break;
case GST_QUERY_POSITION:
gst_query_set_position (query, GST_FORMAT_TIME, GST_AVF_ASSET_SRC_READER(self).position);
ret = TRUE;
break;
case GST_QUERY_SEEKING: {
GstFormat fmt;
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
if (fmt == GST_FORMAT_TIME) {
gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0, GST_AVF_ASSET_SRC_READER(self).duration);
ret = TRUE;
}
break;
}
case GST_QUERY_CAPS: {
GstCaps *filter = NULL;
gst_query_parse_caps (query, &filter);
caps = gst_avf_asset_src_get_caps (self, pad, filter);
gst_query_set_caps_result (query, caps);
ret = TRUE;
break;
}
default:
ret = FALSE;
break;
}
return ret;
}
static gboolean
gst_avf_asset_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstAVFAssetSrc *self;
gboolean res = TRUE;
GError *error = NULL;
self = GST_AVF_ASSET_SRC (gst_pad_get_parent_element (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK: {
GstFormat format;
GstSeekFlags flags;
gdouble rate;
GstSeekType start_type, stop_type;
gint64 start, stop;
GstSegment segment;
GST_DEBUG ("Processing SEEK event");
GST_AVF_ASSET_SRC_LOCK (self);
if (self->seek_event && gst_event_get_seqnum (event) ==
gst_event_get_seqnum (self->seek_event)) {
GST_AVF_ASSET_SRC_UNLOCK (self);
break;
}
self->seek_event = gst_event_ref (event);
GST_AVF_ASSET_SRC_UNLOCK (self);
/* pause tasks before re-acquiring the object's lock */
gst_avf_asset_src_stop_reading (self);
GST_AVF_ASSET_SRC_LOCK (self);
gst_event_parse_seek (event, &rate, &format, &flags, &start_type,
&start, &stop_type, &stop);
if (rate < 0) {
GST_WARNING ("Negative rates are not supported yet");
GST_AVF_ASSET_SRC_UNLOCK (self);
res = FALSE;
break;
}
if (format != GST_FORMAT_TIME || start_type == GST_SEEK_TYPE_NONE) {
GST_AVF_ASSET_SRC_UNLOCK(self);
gst_avf_asset_src_start_reading (self);
res = FALSE;
break;
}
if (stop_type == GST_SEEK_TYPE_NONE) {
stop = GST_CLOCK_TIME_NONE;
}
gst_avf_asset_src_send_event (self, gst_event_new_flush_start ());
[GST_AVF_ASSET_SRC_READER(self) seekTo: start: stop: &error];
gst_segment_init (&segment, GST_FORMAT_TIME);
segment.rate = rate;
segment.start = start;
segment.stop = stop;
segment.position = start;
gst_avf_asset_src_send_event (self, gst_event_new_flush_stop (TRUE));
gst_avf_asset_src_send_event (self, gst_event_new_segment (&segment));
if (error != NULL) {
GST_ELEMENT_ERROR (self, RESOURCE, SEEK,
("AVFAssetReader seek failed"), ("%s", error->message));
g_error_free(error);
res = FALSE;
}
GST_AVF_ASSET_SRC_UNLOCK (self);
gst_event_unref (event);
/* start tasks after releasing the object's lock */
gst_avf_asset_src_start_reading (self);
break;
}
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
gst_object_unref (self);
return res;
}
static GstFlowReturn
gst_avf_asset_src_send_start_stream (GstAVFAssetSrc * self, GstPad * pad)
{
GstEvent *event;
gchar *stream_id;
GstFlowReturn ret;
stream_id = gst_pad_create_stream_id (pad, GST_ELEMENT_CAST (self), NULL);
GST_DEBUG_OBJECT (self, "Pushing STREAM START");
event = gst_event_new_stream_start (stream_id);
gst_event_set_group_id (event, gst_util_group_id_next ());
ret = gst_pad_push_event (pad, event);
g_free (stream_id);
return ret;
}
static GstFlowReturn
gst_avf_asset_src_combine_flows (GstAVFAssetSrc * self, GstAVFAssetReaderMediaType type,
GstFlowReturn ret)
{
gboolean has_other_pad;
GstFlowReturn last_other_pad_ret;
GST_AVF_ASSET_SRC_LOCK (self);
if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO) {
self->last_audio_pad_ret = ret;
has_other_pad = AVF_ASSET_READER_HAS_VIDEO (ret);
last_other_pad_ret = self->last_video_pad_ret;
} else if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO) {
self->last_video_pad_ret = ret;
has_other_pad = AVF_ASSET_READER_HAS_AUDIO (ret);
last_other_pad_ret = self->last_audio_pad_ret;
} else {
GST_ERROR ("Unsupported media type");
ret = GST_FLOW_ERROR;
goto exit;
}
if (!has_other_pad || ret != GST_FLOW_NOT_LINKED)
goto exit;
ret = last_other_pad_ret;
exit:
GST_AVF_ASSET_SRC_UNLOCK (self);
return ret;
}
static void
gst_avf_asset_src_read_data (GstAVFAssetSrc *self, GstPad *pad,
GstAVFAssetReaderMediaType type)
{
GstBuffer *buf;
GstFlowReturn ret, combined_ret;
GError *error;
GST_AVF_ASSET_SRC_LOCK (self);
if (self->state != GST_AVF_ASSET_SRC_STATE_READING) {
GST_AVF_ASSET_SRC_UNLOCK (self);
return;
}
buf = [GST_AVF_ASSET_SRC_READER(self) nextBuffer:type:&error];
GST_AVF_ASSET_SRC_UNLOCK (self);
if (buf == NULL) {
if (error != NULL) {
GST_ELEMENT_ERROR (self, RESOURCE, READ, ("Error reading next buffer"),
("%s", error->message));
g_error_free (error);
gst_avf_asset_src_combine_flows (self, type, GST_FLOW_ERROR);
gst_pad_pause_task (pad);
return;
}
gst_pad_push_event (pad, gst_event_new_eos ());
gst_avf_asset_src_combine_flows (self, type, GST_FLOW_EOS);
gst_pad_pause_task (pad);
return;
}
ret = gst_pad_push (pad, buf);
combined_ret = gst_avf_asset_src_combine_flows (self, type, ret);
if (ret != GST_FLOW_OK) {
GST_WARNING ("Error pushing %s buffer on pad %" GST_PTR_FORMAT
", reason %s", MEDIA_TYPE_TO_STR (type), pad, gst_flow_get_name (ret));
if (ret == GST_FLOW_EOS) {
gst_pad_push_event (pad, gst_event_new_eos ());
}
if (combined_ret != GST_FLOW_OK) {
GST_ELEMENT_FLOW_ERROR (self, ret);
}
gst_pad_pause_task (pad);
}
}
static void
gst_avf_asset_src_read_audio (GstAVFAssetSrc *self)
{
gst_avf_asset_src_read_data (self, self->audiopad,
GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO);
}
static void
gst_avf_asset_src_read_video (GstAVFAssetSrc *self)
{
gst_avf_asset_src_read_data (self, self->videopad,
GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO);
}
static gboolean
gst_avf_asset_src_start_reader (GstAVFAssetSrc * self)
{
GError *error = NULL;
gboolean ret = TRUE;
[GST_AVF_ASSET_SRC_READER(self) start: &error];
if (error != NULL) {
GST_ELEMENT_ERROR (self, RESOURCE, FAILED,
("AVFAssetReader could not start reading"), ("%s", error->message));
g_error_free (error);
ret = FALSE;
goto exit;
}
exit:
return ret;
}
static gboolean
gst_avf_asset_src_send_event (GstAVFAssetSrc *self, GstEvent *event)
{
gboolean ret = TRUE;
if (AVF_ASSET_READER_HAS_VIDEO (self)) {
ret |= gst_pad_push_event (self->videopad, gst_event_ref (event));
}
if (AVF_ASSET_READER_HAS_AUDIO (self)) {
ret |= gst_pad_push_event (self->audiopad, gst_event_ref (event));
}
gst_event_unref (event);
return ret;
}
static void
gst_avf_asset_src_start (GstAVFAssetSrc *self)
{
GstSegment segment;
if (self->state == GST_AVF_ASSET_SRC_STATE_STARTED) {
return;
}
GST_DEBUG_OBJECT (self, "Creating pads and starting reader");
gst_segment_init (&segment, GST_FORMAT_TIME);
segment.duration = GST_AVF_ASSET_SRC_READER(self).duration;
/* We call AVFAssetReader's startReading when the pads are linked
* and no outputs can be added afterwards, so the tracks must be
* selected before adding any of the new pads */
if (AVF_ASSET_READER_HAS_AUDIO (self)) {
[GST_AVF_ASSET_SRC_READER(self) selectTrack: GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO:
self->selected_audio_track];
}
if (AVF_ASSET_READER_HAS_VIDEO (self)) {
[GST_AVF_ASSET_SRC_READER(self) selectTrack: GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO:
self->selected_video_track];
}
if (AVF_ASSET_READER_HAS_AUDIO (self)) {
self->audiopad = gst_pad_new_from_static_template (&audio_factory, "audio");
gst_pad_set_query_function (self->audiopad,
gst_avf_asset_src_query);
gst_pad_set_event_function(self->audiopad,
gst_avf_asset_src_event);
gst_pad_use_fixed_caps (self->audiopad);
gst_pad_set_active (self->audiopad, TRUE);
gst_avf_asset_src_send_start_stream (self, self->audiopad);
gst_pad_set_caps (self->audiopad,
[GST_AVF_ASSET_SRC_READER(self) getCaps: GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO]);
gst_pad_push_event (self->audiopad, gst_event_new_caps (
[GST_AVF_ASSET_SRC_READER(self) getCaps: GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO]));
gst_pad_push_event (self->audiopad, gst_event_new_segment (&segment));
gst_element_add_pad (GST_ELEMENT (self), self->audiopad);
}
if (AVF_ASSET_READER_HAS_VIDEO (self)) {
self->videopad = gst_pad_new_from_static_template (&video_factory, "video");
gst_pad_set_query_function (self->videopad,
gst_avf_asset_src_query);
gst_pad_set_event_function(self->videopad,
gst_avf_asset_src_event);
gst_pad_use_fixed_caps (self->videopad);
gst_pad_set_active (self->videopad, TRUE);
gst_avf_asset_src_send_start_stream (self, self->videopad);
gst_pad_set_caps (self->videopad,
[GST_AVF_ASSET_SRC_READER(self) getCaps: GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO]);
gst_pad_push_event (self->videopad, gst_event_new_caps (
[GST_AVF_ASSET_SRC_READER(self) getCaps: GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO]));
gst_pad_push_event (self->videopad, gst_event_new_segment (&segment));
gst_element_add_pad (GST_ELEMENT (self), self->videopad);
}
gst_element_no_more_pads (GST_ELEMENT (self));
self->state = GST_AVF_ASSET_SRC_STATE_STARTED;
}
static void
gst_avf_asset_src_stop (GstAVFAssetSrc *self)
{
gboolean has_audio, has_video;
if (self->state == GST_AVF_ASSET_SRC_STATE_STOPPED) {
return;
}
GST_DEBUG ("Stopping tasks and removing pads");
has_audio = AVF_ASSET_READER_HAS_AUDIO (self);
has_video = AVF_ASSET_READER_HAS_VIDEO (self);
[GST_AVF_ASSET_SRC_READER(self) stop];
if (has_audio) {
gst_pad_stop_task (self->audiopad);
gst_element_remove_pad (GST_ELEMENT (self), self->audiopad);
}
if (has_video) {
gst_pad_stop_task (self->videopad);
gst_element_remove_pad (GST_ELEMENT (self), self->videopad);
}
self->state = GST_AVF_ASSET_SRC_STATE_STOPPED;
}
static gboolean
gst_avf_asset_src_start_reading (GstAVFAssetSrc *self)
{
gboolean ret = TRUE;
if (self->state != GST_AVF_ASSET_SRC_STATE_STARTED) {
goto exit;
}
GST_DEBUG_OBJECT (self, "Start reading");
if ((ret = gst_avf_asset_src_start_reader (self)) != TRUE) {
goto exit;
}
if (AVF_ASSET_READER_HAS_AUDIO (self)) {
ret = gst_pad_start_task (self->audiopad, (GstTaskFunction)gst_avf_asset_src_read_audio, self, NULL);
if (!ret) {
GST_ERROR ("Failed to start audio task");
goto exit;
}
}
if (AVF_ASSET_READER_HAS_VIDEO (self)) {
ret = gst_pad_start_task (self->videopad, (GstTaskFunction)gst_avf_asset_src_read_video, self, NULL);
if (!ret) {
GST_ERROR ("Failed to start video task");
goto exit;
}
}
self->state = GST_AVF_ASSET_SRC_STATE_READING;
exit:
return ret;
}
static void
gst_avf_asset_src_stop_reading (GstAVFAssetSrc * self)
{
if (self->state != GST_AVF_ASSET_SRC_STATE_READING) {
return;
}
GST_DEBUG_OBJECT (self, "Stop reading");
if (AVF_ASSET_READER_HAS_AUDIO (self)) {
gst_pad_pause_task (self->audiopad);
}
if (AVF_ASSET_READER_HAS_VIDEO (self)) {
gst_pad_pause_task (self->videopad);
}
self->state = GST_AVF_ASSET_SRC_STATE_STARTED;
}
static void
gst_avf_asset_src_stop_all (GstAVFAssetSrc *self)
{
GST_AVF_ASSET_SRC_LOCK (self);
gst_avf_asset_src_stop_reading (self);
gst_avf_asset_src_stop (self);
GST_AVF_ASSET_SRC_UNLOCK (self);
}
static GQuark
gst_avf_asset_src_error_quark (void)
{
static GQuark q; /* 0 */
if (G_UNLIKELY (q == 0)) {
q = g_quark_from_static_string ("avfasset-src-error-quark");
}
return q;
}
static GstURIType
gst_avf_asset_src_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar * const *
gst_avf_asset_src_uri_get_protocols (GType type)
{
static const gchar * const protocols[] = { "file", "ipod-library", NULL };
return protocols;
}
static gchar *
gst_avf_asset_src_uri_get_uri (GstURIHandler * handler)
{
GstAVFAssetSrc *self = GST_AVF_ASSET_SRC (handler);
return g_strdup (self->uri);
}
static gboolean
gst_avf_asset_src_uri_set_uri (GstURIHandler * handler, const gchar * uri, GError **error)
{
GstAVFAssetSrc *self = GST_AVF_ASSET_SRC (handler);
NSString *str;
NSURL *url;
AVAsset *asset;
gboolean ret = FALSE;
str = [NSString stringWithUTF8String: uri];
url = [[NSURL alloc] initWithString: str];
asset = [AVAsset assetWithURL: url];
if (asset.playable) {
ret = TRUE;
g_free (self->uri);
self->uri = g_strdup (uri);
} else {
g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
"Invalid URI '%s' for avfassetsrc", uri);
}
return ret;
}
static void
gst_avf_asset_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_avf_asset_src_uri_get_type;
iface->get_protocols = gst_avf_asset_src_uri_get_protocols;
iface->get_uri = gst_avf_asset_src_uri_get_uri;
iface->set_uri = gst_avf_asset_src_uri_set_uri;
}
@implementation GstAVFAssetReader
@synthesize duration;
@synthesize position;
- (NSDictionary *) capsToAudioSettings
{
gint depth;
gboolean isFloat;
GstAudioInfo info;
if (!gst_caps_is_fixed (audio_caps))
return NULL;
gst_audio_info_from_caps (&info, audio_caps);
isFloat = GST_AUDIO_INFO_IS_FLOAT(&info);
depth = GST_AUDIO_INFO_DEPTH(&info);
return [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:kAudioFormatLinearPCM], AVFormatIDKey,
[NSNumber numberWithFloat:info.rate], AVSampleRateKey,
[NSNumber numberWithInt:info.channels], AVNumberOfChannelsKey,
//[NSData dataWithBytes:&channelLayout length:sizeof(AudioChannelLayout)],
//AVChannelLayoutKey,
[NSNumber numberWithInt:depth], AVLinearPCMBitDepthKey,
[NSNumber numberWithBool:isFloat],AVLinearPCMIsFloatKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsNonInterleaved,
[NSNumber numberWithBool:NO], AVLinearPCMIsBigEndianKey,
nil];
}
- (void) releaseReader
{
video_track = nil;
audio_track = nil;
video_tracks = nil;
audio_tracks = nil;
reader = nil;
}
- (void) initReader: (GError **) error
{
NSError *nserror;
reader = [[AVAssetReader alloc] initWithAsset:asset error:&nserror];
if (nserror != NULL) {
GST_ERROR ("Error initializing reader: %s",
[nserror.description UTF8String]);
*error = g_error_new (GST_AVF_ASSET_SRC_ERROR, GST_AVF_ASSET_ERROR_INIT, "%s",
[nserror.description UTF8String]);
return;
}
audio_tracks = [asset tracksWithMediaType:AVMediaTypeAudio];
video_tracks = [asset tracksWithMediaType:AVMediaTypeVideo];
reader.timeRange = CMTimeRangeMake(kCMTimeZero, asset.duration);
GST_INFO ("Found %lu video tracks and %lu audio tracks",
(unsigned long)[video_tracks count], (unsigned long)[audio_tracks count]);
}
- (id) initWithURI:(gchar*)uri : (GError **)error;
{
NSString *str;
NSURL *url;
GST_INFO ("Initializing AVFAssetReader with uri: %s", uri);
*error = NULL;
str = [NSString stringWithUTF8String: uri];
url = [[NSURL alloc] initWithString: str];
asset = [AVAsset assetWithURL: url];
if (!asset.playable) {
*error = g_error_new (GST_AVF_ASSET_SRC_ERROR, GST_AVF_ASSET_ERROR_NOT_PLAYABLE,
"Media is not playable");
asset = nil;
return nil;
}
selected_audio_track = -1;
selected_video_track = -1;
reading = FALSE;
position = 0;
duration = CMTIME_TO_GST_TIME (asset.duration);
/* FIXME: use fixed caps here until we found a way to determine
* the native audio format */
audio_caps = gst_caps_from_string ("audio/x-raw, "
"format=F32LE, rate=44100, channels=2, layout=interleaved");
[self initReader: error];
if (*error) {
return nil;
}
self = [super init];
return self;
}
- (BOOL) selectTrack: (GstAVFAssetReaderMediaType) type : (gint) index
{
NSArray *tracks;
AVAssetTrack *track;
AVAssetReaderOutput * __strong *output;
NSDictionary *settings;
NSString *mediaType;
gint *selected_track;
GST_INFO ("Selecting %s track %d", MEDIA_TYPE_TO_STR(type), index);
if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO) {
mediaType = AVMediaTypeAudio;
selected_track = &selected_audio_track;
output = &audio_track;
settings = [self capsToAudioSettings];
} else if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO) {
mediaType = AVMediaTypeVideo;
selected_track = &selected_video_track;
output = &video_track;
settings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:
kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange],
kCVPixelBufferPixelFormatTypeKey, nil];
} else {
return FALSE;
}
tracks = [asset tracksWithMediaType:mediaType];
if ([tracks count] == 0 || [tracks count] < index + 1) {
return FALSE;
}
track = [tracks objectAtIndex:index];
*selected_track = index;
*output = [AVAssetReaderTrackOutput
assetReaderTrackOutputWithTrack:track
outputSettings:settings];
[reader addOutput:*output];
return TRUE;
}
- (void) start: (GError **)error
{
if (reading)
return;
if (![reader startReading]) {
*error = g_error_new (GST_AVF_ASSET_SRC_ERROR, GST_AVF_ASSET_ERROR_START,
"%s", [reader.error.description UTF8String]);
reading = FALSE;
return;
}
reading = TRUE;
}
- (void) stop
{
[reader cancelReading];
reading = FALSE;
}
- (BOOL) hasMediaType: (GstAVFAssetReaderMediaType) type
{
if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO) {
return [audio_tracks count] != 0;
}
if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO) {
return [video_tracks count] != 0;
}
return FALSE;
}
- (void) seekTo: (guint64) startTS : (guint64) stopTS : (GError **) error
{
CMTime startTime = kCMTimeZero, stopTime = kCMTimePositiveInfinity;
if (startTS != GST_CLOCK_TIME_NONE) {
startTime = CMTimeMake (startTS, GST_SECOND);
}
if (stopTS != GST_CLOCK_TIME_NONE) {
stopTime = CMTimeMake (stopTS, GST_SECOND);
}
/* AVFAssetReader needs to be recreated before changing the
* timerange property */
[self stop];
[self releaseReader];
[self initReader: error];
if (*error) {
return;
}
GST_DEBUG ("Seeking to start:%" GST_TIME_FORMAT " stop:%" GST_TIME_FORMAT,
GST_TIME_ARGS(startTS), GST_TIME_ARGS(stopTS));
reader.timeRange = CMTimeRangeMake(startTime, stopTime);
[self selectTrack: GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO:selected_audio_track];
[self selectTrack: GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO:selected_video_track];
[self start: error];
}
- (GstBuffer *) nextBuffer: (GstAVFAssetReaderMediaType) type : (GError **) error
{
CMSampleBufferRef cmbuf;
AVAssetReaderTrackOutput *areader = NULL;
GstCaps *caps;
GstBuffer *buf;
CMTime dur, ts;
GST_LOG ("Reading %s next buffer", MEDIA_TYPE_TO_STR (type));
if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO && audio_track != NULL) {
areader = audio_track;
caps = audio_caps;
} else if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO &&
video_track != NULL) {
areader = video_track;
caps = video_caps;
}
if (areader == NULL) {
return NULL;
}
*error = NULL;
cmbuf = [areader copyNextSampleBuffer];
if (cmbuf == NULL) {
if (reader.error != NULL) {
*error = g_error_new (GST_AVF_ASSET_SRC_ERROR, GST_AVF_ASSET_ERROR_READ,
"%s", [reader.error.description UTF8String]);
}
/* EOS */
return NULL;
}
buf = gst_core_media_buffer_new (cmbuf, FALSE, NULL);
CFRelease (cmbuf);
if (buf == NULL)
return NULL;
/* cmbuf is now retained by buf (in meta) */
dur = CMSampleBufferGetDuration (cmbuf);
ts = CMSampleBufferGetPresentationTimeStamp (cmbuf);
if (dur.value != 0) {
GST_BUFFER_DURATION (buf) = CMTIME_TO_GST_TIME (dur);
}
GST_BUFFER_TIMESTAMP (buf) = CMTIME_TO_GST_TIME (ts);
GST_LOG ("Copying next %s buffer ts:%" GST_TIME_FORMAT " dur:%"
GST_TIME_FORMAT, MEDIA_TYPE_TO_STR (type),
GST_TIME_ARGS(GST_BUFFER_TIMESTAMP (buf)),
GST_TIME_ARGS(GST_BUFFER_DURATION (buf)));
if (GST_BUFFER_TIMESTAMP (buf) > position) {
position = GST_BUFFER_TIMESTAMP (buf);
}
return buf;
}
- (GstCaps *) getCaps: (GstAVFAssetReaderMediaType) type
{
GstCaps *caps = NULL;
AVAssetTrack *track;
if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_AUDIO) {
caps = gst_caps_ref (audio_caps);
GST_INFO ("Using audio caps: %" GST_PTR_FORMAT, caps);
} else if (type == GST_AVF_ASSET_READER_MEDIA_TYPE_VIDEO) {
gint fr_n, fr_d;
track = [video_tracks objectAtIndex: selected_video_track];
gst_util_double_to_fraction(track.nominalFrameRate, &fr_n, &fr_d);
caps = gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, "NV12",
"width", G_TYPE_INT, (int) track.naturalSize.width,
"height", G_TYPE_INT, (int) track.naturalSize.height,
"framerate", GST_TYPE_FRACTION, fr_n, fr_d, NULL);
GST_INFO ("Using video caps: %" GST_PTR_FORMAT, caps);
video_caps = gst_caps_ref (caps);
}
return caps;
}
- (void) dealloc
{
asset = nil;
[self releaseReader];
if (audio_caps != NULL) {
gst_caps_unref (audio_caps);
}
if (video_caps != NULL) {
gst_caps_unref (audio_caps);
}
}
@end
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