gstreamer/gst-libs/gst/video/gstbasevideoencoder.c

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/* GStreamer
* Copyright (C) 2008 David Schleef <ds@schleef.org>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstbasevideoencoder.h"
#include "gstbasevideoutils.h"
GST_DEBUG_CATEGORY_EXTERN (basevideo_debug);
#define GST_CAT_DEFAULT basevideo_debug
static void gst_base_video_encoder_finalize (GObject * object);
static gboolean gst_base_video_encoder_sink_setcaps (GstPad * pad,
GstCaps * caps);
static gboolean gst_base_video_encoder_sink_event (GstPad * pad,
GstEvent * event);
static GstFlowReturn gst_base_video_encoder_chain (GstPad * pad,
GstBuffer * buf);
static GstStateChangeReturn gst_base_video_encoder_change_state (GstElement *
element, GstStateChange transition);
static const GstQueryType *gst_base_video_encoder_get_query_types (GstPad *
pad);
static gboolean gst_base_video_encoder_src_query (GstPad * pad,
GstQuery * query);
static void
_do_init (GType object_type)
{
const GInterfaceInfo preset_interface_info = {
NULL, /* interface_init */
NULL, /* interface_finalize */
NULL /* interface_data */
};
g_type_add_interface_static (object_type, GST_TYPE_PRESET,
&preset_interface_info);
}
GST_BOILERPLATE_FULL (GstBaseVideoEncoder, gst_base_video_encoder,
GstBaseVideoCodec, GST_TYPE_BASE_VIDEO_CODEC, _do_init);
static void
gst_base_video_encoder_base_init (gpointer g_class)
{
}
static void
gst_base_video_encoder_class_init (GstBaseVideoEncoderClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->finalize = gst_base_video_encoder_finalize;
gstelement_class->change_state = gst_base_video_encoder_change_state;
parent_class = g_type_class_peek_parent (klass);
}
static void
gst_base_video_encoder_init (GstBaseVideoEncoder * base_video_encoder,
GstBaseVideoEncoderClass * klass)
{
GstPad *pad;
GST_DEBUG ("gst_base_video_encoder_init");
pad = GST_BASE_VIDEO_CODEC_SINK_PAD (base_video_encoder);
gst_pad_set_chain_function (pad, gst_base_video_encoder_chain);
gst_pad_set_event_function (pad, gst_base_video_encoder_sink_event);
gst_pad_set_setcaps_function (pad, gst_base_video_encoder_sink_setcaps);
pad = GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder);
gst_pad_set_query_type_function (pad, gst_base_video_encoder_get_query_types);
gst_pad_set_query_function (pad, gst_base_video_encoder_src_query);
}
static gboolean
gst_base_video_encoder_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstBaseVideoEncoder *base_video_encoder;
GstBaseVideoEncoderClass *base_video_encoder_class;
base_video_encoder = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
base_video_encoder_class =
GST_BASE_VIDEO_ENCODER_GET_CLASS (base_video_encoder);
GST_DEBUG ("setcaps");
gst_base_video_state_from_caps (&base_video_encoder->state, caps);
base_video_encoder_class->set_format (base_video_encoder,
&base_video_encoder->state);
base_video_encoder_class->start (base_video_encoder);
g_object_unref (base_video_encoder);
return TRUE;
}
static void
gst_base_video_encoder_finalize (GObject * object)
{
GstBaseVideoEncoder *base_video_encoder;
GstBaseVideoEncoderClass *base_video_encoder_class;
g_return_if_fail (GST_IS_BASE_VIDEO_ENCODER (object));
base_video_encoder = GST_BASE_VIDEO_ENCODER (object);
base_video_encoder_class = GST_BASE_VIDEO_ENCODER_GET_CLASS (object);
GST_DEBUG ("finalize");
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_base_video_encoder_sink_event (GstPad * pad, GstEvent * event)
{
GstBaseVideoEncoder *base_video_encoder;
GstBaseVideoEncoderClass *base_video_encoder_class;
gboolean ret = FALSE;
base_video_encoder = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
base_video_encoder_class =
GST_BASE_VIDEO_ENCODER_GET_CLASS (base_video_encoder);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
{
GstVideoFrame *frame;
frame = g_malloc0 (sizeof (GstVideoFrame));
frame->presentation_frame_number =
base_video_encoder->presentation_frame_number;
frame->presentation_duration = 0;
frame->is_eos = TRUE;
base_video_encoder->presentation_frame_number++;
base_video_encoder->frames =
g_list_append (base_video_encoder->frames, frame);
base_video_encoder_class->finish (base_video_encoder, frame);
ret =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
event);
}
break;
case GST_EVENT_NEWSEGMENT:
{
gboolean update;
double rate;
double applied_rate;
GstFormat format;
gint64 start;
gint64 stop;
gint64 position;
gst_event_parse_new_segment_full (event, &update, &rate,
&applied_rate, &format, &start, &stop, &position);
if (format != GST_FORMAT_TIME)
goto newseg_wrong_format;
GST_DEBUG ("new segment %lld %lld", start, position);
gst_segment_set_newsegment_full (&base_video_encoder->state.segment,
update, rate, applied_rate, format, start, stop, position);
ret =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
event);
}
break;
default:
/* FIXME this changes the order of events */
ret =
gst_pad_push_event (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
event);
break;
}
done:
gst_object_unref (base_video_encoder);
return ret;
newseg_wrong_format:
{
GST_DEBUG_OBJECT (base_video_encoder, "received non TIME newsegment");
gst_event_unref (event);
goto done;
}
}
static const GstQueryType *
gst_base_video_encoder_get_query_types (GstPad * pad)
{
static const GstQueryType query_types[] = {
GST_QUERY_CONVERT,
GST_QUERY_LATENCY,
0
};
return query_types;
}
static gboolean
gst_base_video_encoder_src_query (GstPad * pad, GstQuery * query)
{
GstBaseVideoEncoder *enc;
gboolean res;
GstPad *peerpad;
enc = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
peerpad = gst_pad_get_peer (GST_BASE_VIDEO_CODEC_SINK_PAD (enc));
switch GST_QUERY_TYPE
(query) {
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res =
gst_base_video_encoded_video_convert (&enc->state, src_fmt, src_val,
&dest_fmt, &dest_val);
if (!res)
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
case GST_QUERY_LATENCY:
{
gboolean live;
GstClockTime min_latency, max_latency;
res = gst_pad_query (peerpad, query);
if (res) {
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
min_latency += enc->min_latency;
if (max_latency != GST_CLOCK_TIME_NONE) {
max_latency += enc->max_latency;
}
gst_query_set_latency (query, live, min_latency, max_latency);
}
}
break;
default:
res = gst_pad_query_default (pad, query);
}
gst_object_unref (peerpad);
gst_object_unref (enc);
return res;
error:
GST_DEBUG_OBJECT (enc, "query failed");
gst_object_unref (peerpad);
gst_object_unref (enc);
return res;
}
static gboolean
gst_pad_is_negotiated (GstPad * pad)
{
GstCaps *caps;
g_return_val_if_fail (pad != NULL, FALSE);
caps = gst_pad_get_negotiated_caps (pad);
if (caps) {
gst_caps_unref (caps);
return TRUE;
}
return FALSE;
}
static GstFlowReturn
gst_base_video_encoder_chain (GstPad * pad, GstBuffer * buf)
{
GstBaseVideoEncoder *base_video_encoder;
GstBaseVideoEncoderClass *klass;
GstVideoFrame *frame;
if (!gst_pad_is_negotiated (pad)) {
return GST_FLOW_NOT_NEGOTIATED;
}
base_video_encoder = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
klass = GST_BASE_VIDEO_ENCODER_GET_CLASS (base_video_encoder);
if (base_video_encoder->sink_clipping) {
gint64 start = GST_BUFFER_TIMESTAMP (buf);
gint64 stop = start + GST_BUFFER_DURATION (buf);
gint64 clip_start;
gint64 clip_stop;
if (!gst_segment_clip (&base_video_encoder->state.segment,
GST_FORMAT_TIME, start, stop, &clip_start, &clip_stop)) {
GST_DEBUG ("clipping to segment dropped frame");
goto done;
}
}
frame = g_malloc0 (sizeof (GstVideoFrame));
frame->sink_buffer = buf;
frame->presentation_timestamp = GST_BUFFER_TIMESTAMP (buf);
frame->presentation_duration = GST_BUFFER_DURATION (buf);
frame->presentation_frame_number =
base_video_encoder->presentation_frame_number;
base_video_encoder->presentation_frame_number++;
base_video_encoder->frames =
g_list_append (base_video_encoder->frames, frame);
klass->handle_frame (base_video_encoder, frame);
done:
g_object_unref (base_video_encoder);
return GST_FLOW_OK;
}
static GstStateChangeReturn
gst_base_video_encoder_change_state (GstElement * element,
GstStateChange transition)
{
GstBaseVideoEncoder *base_video_encoder;
GstBaseVideoEncoderClass *base_video_encoder_class;
GstStateChangeReturn ret;
base_video_encoder = GST_BASE_VIDEO_ENCODER (element);
base_video_encoder_class = GST_BASE_VIDEO_ENCODER_GET_CLASS (element);
switch (transition) {
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (base_video_encoder_class->stop) {
base_video_encoder_class->stop (base_video_encoder);
}
break;
default:
break;
}
return ret;
}
GstFlowReturn
gst_base_video_encoder_finish_frame (GstBaseVideoEncoder * base_video_encoder,
GstVideoFrame * frame)
{
GstFlowReturn ret;
GstBaseVideoEncoderClass *base_video_encoder_class;
base_video_encoder_class =
GST_BASE_VIDEO_ENCODER_GET_CLASS (base_video_encoder);
frame->system_frame_number = base_video_encoder->system_frame_number;
base_video_encoder->system_frame_number++;
if (frame->is_sync_point) {
base_video_encoder->distance_from_sync = 0;
GST_BUFFER_FLAG_UNSET (frame->src_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
} else {
GST_BUFFER_FLAG_SET (frame->src_buffer, GST_BUFFER_FLAG_DELTA_UNIT);
}
frame->distance_from_sync = base_video_encoder->distance_from_sync;
base_video_encoder->distance_from_sync++;
frame->decode_frame_number = frame->system_frame_number - 1;
if (frame->decode_frame_number < 0) {
frame->decode_timestamp = 0;
} else {
frame->decode_timestamp = gst_util_uint64_scale (frame->decode_frame_number,
GST_SECOND * base_video_encoder->state.fps_d,
base_video_encoder->state.fps_n);
}
GST_BUFFER_TIMESTAMP (frame->src_buffer) = frame->presentation_timestamp;
GST_BUFFER_DURATION (frame->src_buffer) = frame->presentation_duration;
GST_BUFFER_OFFSET (frame->src_buffer) = frame->decode_timestamp;
base_video_encoder->frames =
g_list_remove (base_video_encoder->frames, frame);
if (!base_video_encoder->set_output_caps) {
GstCaps *caps;
if (base_video_encoder_class->get_caps) {
caps = base_video_encoder_class->get_caps (base_video_encoder);
} else {
caps = gst_caps_new_simple ("video/unknown", NULL);
}
base_video_encoder->caps = gst_caps_ref (caps);
gst_pad_set_caps (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder), caps);
base_video_encoder->set_output_caps = TRUE;
}
if (base_video_encoder_class->shape_output) {
ret = base_video_encoder_class->shape_output (base_video_encoder, frame);
} else {
ret =
gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
frame->src_buffer);
}
g_free (frame);
return ret;
}
int
gst_base_video_encoder_get_height (GstBaseVideoEncoder * base_video_encoder)
{
return base_video_encoder->state.height;
}
int
gst_base_video_encoder_get_width (GstBaseVideoEncoder * base_video_encoder)
{
return base_video_encoder->state.width;
}
const GstVideoState *
gst_base_video_encoder_get_state (GstBaseVideoEncoder * base_video_encoder)
{
return &base_video_encoder->state;
}
GstFlowReturn
gst_base_video_encoder_end_of_stream (GstBaseVideoEncoder * base_video_encoder,
GstBuffer * buffer)
{
if (base_video_encoder->frames) {
GST_WARNING ("EOS with frames left over");
}
return gst_pad_push (GST_BASE_VIDEO_CODEC_SRC_PAD (base_video_encoder),
buffer);
}
void
gst_base_video_encoder_set_latency (GstBaseVideoEncoder * base_video_encoder,
GstClockTime min_latency, GstClockTime max_latency)
{
g_return_if_fail (min_latency >= 0);
g_return_if_fail (max_latency >= min_latency);
base_video_encoder->min_latency = min_latency;
base_video_encoder->max_latency = max_latency;
}
void
gst_base_video_encoder_set_latency_fields (GstBaseVideoEncoder *
base_video_encoder, int n_fields)
{
gint64 latency;
latency = gst_util_uint64_scale (n_fields,
base_video_encoder->state.fps_d * GST_SECOND,
2 * base_video_encoder->state.fps_n);
gst_base_video_encoder_set_latency (base_video_encoder, latency, latency);
}