/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2006> Mark Nauwelaerts * * 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-y4menc * * * * Creates a YU4MPEG2 raw video stream as defined by the mjpegtools project. * * Example launch line * * (write everything in one line, without the backslash characters) * * gst-launch-0.10 videotestsrc num-buffers=250 \ * ! 'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1' \ * ! y4menc ! filesink location=test.yuv * * * * */ /* see mjpegtools/yuv4mpeg.h for yuv4mpeg format */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "gsty4mencode.h" /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0 }; static GstStaticPadTemplate y4mencode_src_factory = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("application/x-yuv4mpeg, " "y4mversion = (int) 2") ); static GstStaticPadTemplate y4mencode_sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{ IYUV, I420, Y42B, Y41B, Y444 }")) ); static void gst_y4m_encode_reset (GstY4mEncode * filter); static gboolean gst_y4m_encode_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static GstFlowReturn gst_y4m_encode_chain (GstPad * pad, GstObject * parent, GstBuffer * buf); static GstStateChangeReturn gst_y4m_encode_change_state (GstElement * element, GstStateChange transition); #define gst_y4m_encode_parent_class parent_class G_DEFINE_TYPE (GstY4mEncode, gst_y4m_encode, GST_TYPE_ELEMENT); static void gst_y4m_encode_class_init (GstY4mEncodeClass * klass) { GstElementClass *gstelement_class; gstelement_class = (GstElementClass *) klass; gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_y4m_encode_change_state); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&y4mencode_src_factory)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&y4mencode_sink_factory)); gst_element_class_set_static_metadata (gstelement_class, "YUV4MPEG video encoder", "Codec/Encoder/Video", "Encodes a YUV frame into the yuv4mpeg format (mjpegtools)", "Wim Taymans "); } static void gst_y4m_encode_init (GstY4mEncode * filter) { filter->sinkpad = gst_pad_new_from_static_template (&y4mencode_sink_factory, "sink"); gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad); gst_pad_set_chain_function (filter->sinkpad, GST_DEBUG_FUNCPTR (gst_y4m_encode_chain)); gst_pad_set_event_function (filter->sinkpad, GST_DEBUG_FUNCPTR (gst_y4m_encode_sink_event)); filter->srcpad = gst_pad_new_from_static_template (&y4mencode_src_factory, "src"); gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad); gst_pad_use_fixed_caps (filter->srcpad); /* init properties */ gst_y4m_encode_reset (filter); } static void gst_y4m_encode_reset (GstY4mEncode * filter) { filter->negotiated = FALSE; } static gboolean gst_y4m_encode_setcaps (GstPad * pad, GstCaps * vscaps) { gboolean ret; GstY4mEncode *filter; GstVideoInfo info; filter = GST_Y4M_ENCODE (GST_PAD_PARENT (pad)); if (!gst_video_info_from_caps (&info, vscaps)) goto invalid_format; switch (GST_VIDEO_INFO_FORMAT (&info)) { case GST_VIDEO_FORMAT_I420: filter->colorspace = "420"; break; case GST_VIDEO_FORMAT_Y42B: filter->colorspace = "422"; break; case GST_VIDEO_FORMAT_Y41B: filter->colorspace = "411"; break; case GST_VIDEO_FORMAT_Y444: filter->colorspace = "444"; break; default: goto invalid_format; } filter->info = info; /* the template caps will do for the src pad, should always accept */ ret = gst_pad_set_caps (filter->srcpad, gst_static_pad_template_get_caps (&y4mencode_src_factory)); filter->negotiated = ret; return ret; /* ERRORS */ invalid_format: { GST_ERROR_OBJECT (filter, "got invalid caps"); return FALSE; } } static gboolean gst_y4m_encode_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { gboolean res; switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); res = gst_y4m_encode_setcaps (pad, caps); gst_event_unref (event); break; } default: res = gst_pad_event_default (pad, parent, event); break; } return res; } static inline GstBuffer * gst_y4m_encode_get_stream_header (GstY4mEncode * filter, gboolean tff) { gpointer header; GstBuffer *buf; gchar interlaced; gsize len; if (GST_VIDEO_INFO_IS_INTERLACED (&filter->info)) { if (tff) interlaced = 't'; else interlaced = 'b'; } else { interlaced = 'p'; } header = g_strdup_printf ("YUV4MPEG2 C%s W%d H%d I%c F%d:%d A%d:%d\n", filter->colorspace, GST_VIDEO_INFO_WIDTH (&filter->info), GST_VIDEO_INFO_HEIGHT (&filter->info), interlaced, GST_VIDEO_INFO_FPS_N (&filter->info), GST_VIDEO_INFO_FPS_D (&filter->info), GST_VIDEO_INFO_PAR_N (&filter->info), GST_VIDEO_INFO_PAR_D (&filter->info)); len = strlen (header); buf = gst_buffer_new (); gst_buffer_append_memory (buf, gst_memory_new_wrapped (0, header, len, 0, len, header, g_free)); return buf; } static inline GstBuffer * gst_y4m_encode_get_frame_header (GstY4mEncode * filter) { gpointer header; GstBuffer *buf; gsize len; header = g_strdup_printf ("FRAME\n"); len = strlen (header); buf = gst_buffer_new (); gst_buffer_append_memory (buf, gst_memory_new_wrapped (0, header, len, 0, len, header, g_free)); return buf; } static GstFlowReturn gst_y4m_encode_chain (GstPad * pad, GstObject * parent, GstBuffer * buf) { GstY4mEncode *filter = GST_Y4M_ENCODE (parent); GstBuffer *outbuf; GstClockTime timestamp; /* check we got some decent info from caps */ if (GST_VIDEO_INFO_FORMAT (&filter->info) == GST_VIDEO_FORMAT_UNKNOWN) goto not_negotiated; timestamp = GST_BUFFER_TIMESTAMP (buf); if (G_UNLIKELY (!filter->header)) { gboolean tff = FALSE; if (GST_VIDEO_INFO_IS_INTERLACED (&filter->info)) { tff = GST_BUFFER_FLAG_IS_SET (buf, GST_VIDEO_BUFFER_FLAG_TFF); } outbuf = gst_y4m_encode_get_stream_header (filter, tff); filter->header = TRUE; outbuf = gst_buffer_append (outbuf, gst_y4m_encode_get_frame_header (filter)); } else { outbuf = gst_y4m_encode_get_frame_header (filter); } /* join with data, FIXME, strides are all wrong etc */ outbuf = gst_buffer_append (outbuf, buf); /* decorate */ outbuf = gst_buffer_make_writable (outbuf); GST_BUFFER_TIMESTAMP (outbuf) = timestamp; return gst_pad_push (filter->srcpad, outbuf); /* ERRORS */ not_negotiated: { GST_ELEMENT_ERROR (filter, CORE, NEGOTIATION, (NULL), ("format wasn't negotiated before chain function")); gst_buffer_unref (buf); return GST_FLOW_NOT_NEGOTIATED; } } static GstStateChangeReturn gst_y4m_encode_change_state (GstElement * element, GstStateChange transition) { GstY4mEncode *filter = GST_Y4M_ENCODE (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: case GST_STATE_CHANGE_READY_TO_PAUSED: break; default: break; } ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state, (element, transition), GST_STATE_CHANGE_SUCCESS); if (ret != GST_STATE_CHANGE_SUCCESS) return ret; switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_y4m_encode_reset (filter); break; default: break; } return GST_STATE_CHANGE_SUCCESS; } static gboolean plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "y4menc", GST_RANK_PRIMARY, GST_TYPE_Y4M_ENCODE); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, y4menc, "Encodes a YUV frame into the yuv4mpeg format (mjpegtools)", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)