/* G-Streamer hardware MJPEG video source plugin * Copyright (C) 2001 Ronald Bultje * * 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. */ #include #include "v4lmjpegsrc_calls.h" static GstElementDetails gst_v4lmjpegsrc_details = { "Video (video4linux/MJPEG) Source", "Source/Video", "Reads MJPEG-encoded frames from a zoran MJPEG/video4linux device", VERSION, "Ronald Bultje ", "(C) 2001", }; /* V4lMjpegSrc signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; /* arguments */ enum { ARG_0, ARG_X_OFFSET, ARG_Y_OFFSET, ARG_F_WIDTH, ARG_F_HEIGHT, ARG_H_DECIMATION, ARG_V_DECIMATION, ARG_WIDTH, ARG_HEIGHT, ARG_QUALITY, ARG_NUMBUFS, ARG_BUFSIZE }; /* init functions */ static void gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass *klass); static void gst_v4lmjpegsrc_init (GstV4lMjpegSrc *v4lmjpegsrc); /* pad/buffer functions */ static GstPadNegotiateReturn gst_v4lmjpegsrc_negotiate (GstPad *pad, GstCaps **caps, gpointer *user_data); static GstCaps* gst_v4lmjpegsrc_create_caps (GstV4lMjpegSrc *v4lmjpegsrc); static GstBuffer* gst_v4lmjpegsrc_get (GstPad *pad); /* get/set params */ static void gst_v4lmjpegsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gst_v4lmjpegsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); /* state handling */ static GstElementStateReturn gst_v4lmjpegsrc_change_state (GstElement *element); /* bufferpool functions */ static GstBuffer* gst_v4lmjpegsrc_buffer_new (GstBufferPool *pool, gint64 location, gint size, gpointer user_data); static GstBuffer* gst_v4lmjpegsrc_buffer_copy (GstBuffer *srcbuf); static void gst_v4lmjpegsrc_buffer_free (GstBuffer *buf); static GstElementClass *parent_class = NULL; //static guint gst_v4lmjpegsrc_signals[LAST_SIGNAL] = { 0 }; GType gst_v4lmjpegsrc_get_type (void) { static GType v4lmjpegsrc_type = 0; if (!v4lmjpegsrc_type) { static const GTypeInfo v4lmjpegsrc_info = { sizeof(GstV4lMjpegSrcClass), NULL, NULL, (GClassInitFunc)gst_v4lmjpegsrc_class_init, NULL, NULL, sizeof(GstV4lMjpegSrc), 0, (GInstanceInitFunc)gst_v4lmjpegsrc_init, NULL }; v4lmjpegsrc_type = g_type_register_static(GST_TYPE_V4LELEMENT, "GstV4lMjpegSrc", &v4lmjpegsrc_info, 0); } return v4lmjpegsrc_type; } static void gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass *klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass*)klass; gstelement_class = (GstElementClass*)klass; parent_class = g_type_class_ref(GST_TYPE_V4LELEMENT); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_X_OFFSET, g_param_spec_int("x_offset","x_offset","x_offset", G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_Y_OFFSET, g_param_spec_int("y_offset","y_offset","y_offset", G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_F_WIDTH, g_param_spec_int("frame_width","frame_width","frame_width", G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_F_HEIGHT, g_param_spec_int("frame_height","frame_height","frame_height", G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_H_DECIMATION, g_param_spec_int("h_decimation","h_decimation","h_decimation", G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_V_DECIMATION, g_param_spec_int("v_decimation","v_decimation","v_decimation", G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH, g_param_spec_int("width","width","width", G_MININT,G_MAXINT,0,G_PARAM_READABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT, g_param_spec_int("height","height","height", G_MININT,G_MAXINT,0,G_PARAM_READABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_QUALITY, g_param_spec_int("quality","quality","quality", G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_NUMBUFS, g_param_spec_int("num_buffers","num_buffers","num_buffers", G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BUFSIZE, g_param_spec_int("buffer_size","buffer_size","buffer_size", G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); gobject_class->set_property = gst_v4lmjpegsrc_set_property; gobject_class->get_property = gst_v4lmjpegsrc_get_property; gstelement_class->change_state = gst_v4lmjpegsrc_change_state; } static void gst_v4lmjpegsrc_init (GstV4lMjpegSrc *v4lmjpegsrc) { v4lmjpegsrc->srcpad = gst_pad_new("src", GST_PAD_SRC); gst_element_add_pad(GST_ELEMENT(v4lmjpegsrc), v4lmjpegsrc->srcpad); gst_pad_set_get_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_get); gst_pad_set_negotiate_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_negotiate); v4lmjpegsrc->bufferpool = gst_buffer_pool_new(); gst_buffer_pool_set_buffer_new_function(v4lmjpegsrc->bufferpool, gst_v4lmjpegsrc_buffer_new); gst_buffer_pool_set_buffer_copy_function(v4lmjpegsrc->bufferpool, gst_v4lmjpegsrc_buffer_copy); gst_buffer_pool_set_buffer_free_function(v4lmjpegsrc->bufferpool, gst_v4lmjpegsrc_buffer_free); gst_buffer_pool_set_user_data(v4lmjpegsrc->bufferpool, v4lmjpegsrc); v4lmjpegsrc->frame_width = 0; v4lmjpegsrc->frame_height = 0; v4lmjpegsrc->x_offset = -1; v4lmjpegsrc->y_offset = -1; v4lmjpegsrc->horizontal_decimation = 4; v4lmjpegsrc->vertical_decimation = 4; v4lmjpegsrc->end_width = 0; v4lmjpegsrc->end_height = 0; v4lmjpegsrc->quality = 50; v4lmjpegsrc->numbufs = 64; v4lmjpegsrc->bufsize = 256; v4lmjpegsrc->init = TRUE; } static GstPadNegotiateReturn gst_v4lmjpegsrc_negotiate (GstPad *pad, GstCaps **caps, gpointer *user_data) { GstV4lMjpegSrc *v4lmjpegsrc; v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad)); if (!*caps) { return GST_PAD_NEGOTIATE_FAIL; } else { return GST_PAD_NEGOTIATE_AGREE; } return GST_PAD_NEGOTIATE_FAIL; } static GstCaps* gst_v4lmjpegsrc_create_caps (GstV4lMjpegSrc *v4lmjpegsrc) { GstCaps *caps; caps = GST_CAPS_NEW ( "v4lmjpegsrc_caps", "video/jpeg", "width", GST_PROPS_INT(v4lmjpegsrc->end_width), "height", GST_PROPS_INT(v4lmjpegsrc->end_height) ); return caps; } static GstBuffer* gst_v4lmjpegsrc_get (GstPad *pad) { GstV4lMjpegSrc *v4lmjpegsrc; GstBuffer *buf; gint num; g_return_val_if_fail (pad != NULL, NULL); v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad)); if (v4lmjpegsrc->init) { gst_pad_set_caps (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_create_caps (v4lmjpegsrc)); v4lmjpegsrc->init = FALSE; } else { if (!gst_pad_get_caps (v4lmjpegsrc->srcpad) && !gst_pad_renegotiate (v4lmjpegsrc->srcpad)) { return NULL; } } buf = gst_buffer_new_from_pool(v4lmjpegsrc->bufferpool, 0, 0); if (!buf) { gst_element_error(GST_ELEMENT(v4lmjpegsrc), "Failed to create a new GstBuffer"); return NULL; } /* grab a frame from the device */ if (!gst_v4lmjpegsrc_grab_frame(v4lmjpegsrc, &num, &(GST_BUFFER_SIZE(buf)))) return NULL; GST_BUFFER_DATA(buf) = gst_v4lmjpegsrc_get_buffer(v4lmjpegsrc, num); buf->timestamp = v4lmjpegsrc->bsync.timestamp.tv_sec * 1000000000 + v4lmjpegsrc->bsync.timestamp.tv_usec * 1000; return buf; } static void gst_v4lmjpegsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GstV4lMjpegSrc *v4lmjpegsrc; g_return_if_fail(GST_IS_V4LMJPEGSRC(object)); v4lmjpegsrc = GST_V4LMJPEGSRC(object); switch (prop_id) { case ARG_X_OFFSET: v4lmjpegsrc->x_offset = g_value_get_int(value); break; case ARG_Y_OFFSET: v4lmjpegsrc->y_offset = g_value_get_int(value); break; case ARG_F_WIDTH: v4lmjpegsrc->frame_width = g_value_get_int(value); break; case ARG_F_HEIGHT: v4lmjpegsrc->frame_height = g_value_get_int(value); break; case ARG_H_DECIMATION: v4lmjpegsrc->horizontal_decimation = g_value_get_int(value); break; case ARG_V_DECIMATION: v4lmjpegsrc->vertical_decimation = g_value_get_int(value); break; case ARG_QUALITY: v4lmjpegsrc->quality = g_value_get_int(value); break; case ARG_NUMBUFS: v4lmjpegsrc->numbufs = g_value_get_int(value); break; case ARG_BUFSIZE: v4lmjpegsrc->bufsize = g_value_get_int(value); break; default: /*parent_class->set_property(object, prop_id, value, pspec);*/ break; } } static void gst_v4lmjpegsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GstV4lMjpegSrc *v4lmjpegsrc; g_return_if_fail(GST_IS_V4LMJPEGSRC(object)); v4lmjpegsrc = GST_V4LMJPEGSRC(object); switch (prop_id) { case ARG_WIDTH: g_value_set_int(value, v4lmjpegsrc->end_width); break; case ARG_HEIGHT: g_value_set_int(value, v4lmjpegsrc->end_height); break; case ARG_NUMBUFS: g_value_set_int(value, v4lmjpegsrc->breq.count); break; case ARG_BUFSIZE: g_value_set_int(value, v4lmjpegsrc->breq.size); break; default: /*parent_class->get_property(object, prop_id, value, pspec);*/ break; } } static GstElementStateReturn gst_v4lmjpegsrc_change_state (GstElement *element) { GstV4lMjpegSrc *v4lmjpegsrc; GstElementStateReturn parent_value; g_return_val_if_fail(GST_IS_V4LMJPEGSRC(element), GST_STATE_FAILURE); v4lmjpegsrc = GST_V4LMJPEGSRC(element); switch (GST_STATE_TRANSITION(element)) { case GST_STATE_READY_TO_PAUSED: /* set buffer info */ if (!gst_v4lmjpegsrc_set_buffer(v4lmjpegsrc, v4lmjpegsrc->numbufs, v4lmjpegsrc->bufsize)) return GST_STATE_FAILURE; /* set capture parameters and mmap the buffers */ if (!v4lmjpegsrc->frame_width && !v4lmjpegsrc->frame_height && v4lmjpegsrc->x_offset < 0 && v4lmjpegsrc->y_offset < 0 && v4lmjpegsrc->horizontal_decimation == v4lmjpegsrc->vertical_decimation) { if (!gst_v4lmjpegsrc_set_capture(v4lmjpegsrc, v4lmjpegsrc->horizontal_decimation, v4lmjpegsrc->quality)) return GST_STATE_FAILURE; } else { if (!gst_v4lmjpegsrc_set_capture_m(v4lmjpegsrc, v4lmjpegsrc->x_offset, v4lmjpegsrc->y_offset, v4lmjpegsrc->frame_width, v4lmjpegsrc->frame_height, v4lmjpegsrc->horizontal_decimation, v4lmjpegsrc->vertical_decimation, v4lmjpegsrc->quality)) return GST_STATE_FAILURE; } v4lmjpegsrc->init = TRUE; if (!gst_v4lmjpegsrc_capture_init(v4lmjpegsrc)) return GST_STATE_FAILURE; break; case GST_STATE_PAUSED_TO_PLAYING: /* queue all buffer, start streaming capture */ if (!gst_v4lmjpegsrc_capture_start(v4lmjpegsrc)) return GST_STATE_FAILURE; break; case GST_STATE_PLAYING_TO_PAUSED: /* de-queue all queued buffers */ if (!gst_v4lmjpegsrc_capture_stop(v4lmjpegsrc)) return GST_STATE_FAILURE; break; case GST_STATE_PAUSED_TO_READY: /* stop capturing, unmap all buffers */ if (!gst_v4lmjpegsrc_capture_deinit(v4lmjpegsrc)) return GST_STATE_FAILURE; break; } if (GST_ELEMENT_CLASS (parent_class)->change_state) parent_value = GST_ELEMENT_CLASS (parent_class)->change_state (element); if (GST_STATE_TRANSITION(element) == GST_STATE_NULL_TO_READY) { /* do autodetection if no input/norm is selected yet */ if ((GST_V4LELEMENT(v4lmjpegsrc)->norm < VIDEO_MODE_PAL || GST_V4LELEMENT(v4lmjpegsrc)->norm == VIDEO_MODE_AUTO) || (GST_V4LELEMENT(v4lmjpegsrc)->channel < 0 || GST_V4LELEMENT(v4lmjpegsrc)->channel == V4L_MJPEG_INPUT_AUTO)) { gint norm, input; if (GST_V4LELEMENT(v4lmjpegsrc)->norm < 0) norm = VIDEO_MODE_AUTO; else norm = GST_V4LELEMENT(v4lmjpegsrc)->norm; if (GST_V4LELEMENT(v4lmjpegsrc)->channel < 0) input = V4L_MJPEG_INPUT_AUTO; else input = GST_V4LELEMENT(v4lmjpegsrc)->channel; if (!gst_v4lmjpegsrc_set_input_norm(v4lmjpegsrc, input, norm)) return GST_STATE_FAILURE; } } if (GST_ELEMENT_CLASS (parent_class)->change_state) return parent_value; return GST_STATE_SUCCESS; } static GstBuffer* gst_v4lmjpegsrc_buffer_new (GstBufferPool *pool, gint64 location, gint size, gpointer user_data) { GstBuffer *buffer; buffer = gst_buffer_new(); if (!buffer) return NULL; buffer->pool_private = user_data; /* TODO: add interlacing info to buffer as metadata */ return buffer; } static GstBuffer* gst_v4lmjpegsrc_buffer_copy (GstBuffer *srcbuf) { GstBuffer *buffer; buffer = gst_buffer_new(); if (!buffer) return NULL; GST_BUFFER_DATA(buffer) = g_malloc(GST_BUFFER_SIZE(srcbuf)); if (!GST_BUFFER_DATA(buffer)) return NULL; GST_BUFFER_SIZE(buffer) = GST_BUFFER_SIZE(srcbuf); memcpy(GST_BUFFER_DATA(buffer), GST_BUFFER_DATA(srcbuf), GST_BUFFER_SIZE(srcbuf)); GST_BUFFER_TIMESTAMP(buffer) = GST_BUFFER_TIMESTAMP(srcbuf); return buffer; } static void gst_v4lmjpegsrc_buffer_free (GstBuffer *buf) { GstV4lMjpegSrc *v4lmjpegsrc = buf->pool_private; int n; for (n=0;nbreq.count;n++) if (GST_BUFFER_DATA(buf) == gst_v4lmjpegsrc_get_buffer(v4lmjpegsrc, n)) { gst_v4lmjpegsrc_requeue_frame(v4lmjpegsrc, n); return; } gst_element_error(GST_ELEMENT(v4lmjpegsrc), "Couldn't find the buffer"); } static gboolean plugin_init (GModule *module, GstPlugin *plugin) { GstElementFactory *factory; /* create an elementfactory for the v4lmjpegsrcparse element */ factory = gst_elementfactory_new("v4lmjpegsrc",GST_TYPE_V4LMJPEGSRC, &gst_v4lmjpegsrc_details); g_return_val_if_fail(factory != NULL, FALSE); gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); return TRUE; } GstPluginDesc plugin_desc = { GST_VERSION_MAJOR, GST_VERSION_MINOR, "v4lmjpegsrc", plugin_init };