diff options
Diffstat (limited to 'sys/v4l/gstv4lmjpegsrc.c')
| -rw-r--r-- | sys/v4l/gstv4lmjpegsrc.c | 872 |
1 files changed, 0 insertions, 872 deletions
diff --git a/sys/v4l/gstv4lmjpegsrc.c b/sys/v4l/gstv4lmjpegsrc.c deleted file mode 100644 index fbe10a4c..00000000 --- a/sys/v4l/gstv4lmjpegsrc.c +++ /dev/null @@ -1,872 +0,0 @@ -/* GStreamer - * - * gstv4lmjpegsrc.c: hardware MJPEG video source plugin - * - * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net> - * - * 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 <string.h> -#include "v4lmjpegsrc_calls.h" - -GST_DEBUG_CATEGORY (v4lmjpegsrc_debug); -#define GST_CAT_DEFAULT v4lmjpegsrc_debug - -/* elementfactory information */ -static const GstElementDetails gst_v4lmjpegsrc_details = -GST_ELEMENT_DETAILS ("Video (video4linux/MJPEG) Source", - "Source/Video", - "Reads MJPEG-encoded frames from a zoran MJPEG/video4linux device", - "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>"); - -/* V4lMjpegSrc signals and args */ -enum -{ - SIGNAL_FRAME_CAPTURE, - SIGNAL_FRAME_DROP, - SIGNAL_FRAME_INSERT, - SIGNAL_FRAME_LOST, - LAST_SIGNAL -}; - -/* arguments */ -enum -{ - ARG_0, -#if 0 - ARG_X_OFFSET, - ARG_Y_OFFSET, - ARG_F_WIDTH, - ARG_F_HEIGHT, - /* normally, we would want to use subframe capture, however, - * for the time being it's easier if we disable it first */ -#endif - ARG_QUALITY, - ARG_NUMBUFS, - ARG_BUFSIZE, - ARG_USE_FIXED_FPS -}; - -GST_FORMATS_FUNCTION (GstPad *, gst_v4lmjpegsrc_get_formats, - GST_FORMAT_TIME, GST_FORMAT_DEFAULT); -GST_QUERY_TYPE_FUNCTION (GstPad *, gst_v4lmjpegsrc_get_query_types, - GST_QUERY_POSITION); - -/* init functions */ -static void gst_v4lmjpegsrc_base_init (gpointer g_class); -static void gst_v4lmjpegsrc_class_init (GstV4lMjpegSrcClass * klass); -static void gst_v4lmjpegsrc_init (GstV4lMjpegSrc * v4lmjpegsrc); - -/* pad/info functions */ -static gboolean gst_v4lmjpegsrc_src_convert (GstPad * pad, - GstFormat src_format, - gint64 src_value, GstFormat * dest_format, gint64 * dest_value); -static gboolean gst_v4lmjpegsrc_src_query (GstPad * pad, - GstQueryType type, GstFormat * format, gint64 * value); - -/* buffer functions */ -static GstPadLinkReturn gst_v4lmjpegsrc_srcconnect (GstPad * pad, - const GstCaps * caps); -static GstData *gst_v4lmjpegsrc_get (GstPad * pad); -static GstCaps *gst_v4lmjpegsrc_getcaps (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); - -/* set_clock function for A/V sync */ -static void gst_v4lmjpegsrc_set_clock (GstElement * element, GstClock * clock); - -/* state handling */ -static GstStateChangeReturn gst_v4lmjpegsrc_change_state (GstElement * element); - -/* requeue buffer after use */ -static void gst_v4lmjpegsrc_buffer_free (GstBuffer * buffer); - -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), - gst_v4lmjpegsrc_base_init, - 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_base_init (gpointer g_class) -{ - static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", - GST_PAD_SRC, - GST_PAD_ALWAYS, - GST_STATIC_CAPS ("image/jpeg, " - "width = (int) [ 0, MAX ], " - "height = (int) [ 0, MAX ], " "framerate = (fraction) [ 0, MAX ]") - ); - GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); - - gst_element_class_set_details (gstelement_class, &gst_v4lmjpegsrc_details); - - gst_element_class_add_pad_template (gstelement_class, - gst_static_pad_template_get (&src_template)); -} - -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_peek_parent (klass); - -#if 0 - 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_PARAM_STATIC_STRINGS)); - 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_PARAM_STATIC_STRINGS)); - 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_PARAM_STATIC_STRINGS)); - 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_PARAM_STATIC_STRINGS)); -#endif - - g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY, - g_param_spec_int ("quality", "Quality", "JPEG frame quality", - 1, 100, 50, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - - g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUMBUFS, - g_param_spec_int ("num-buffers", "Num Buffers", "Number of Buffers", - 1, 256, 64, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BUFSIZE, - g_param_spec_int ("buffer-size", "Buffer Size", "Size of buffers", - 0, 512 * 1024, 128 * 1024, - G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); - - g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_USE_FIXED_FPS, - g_param_spec_boolean ("use-fixed-fps", "Use Fixed FPS", - "Drop/Insert frames to reach a certain FPS (TRUE) " - "or adapt FPS to suit the number of grabbed frames", - TRUE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); - - /* signals */ - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_CAPTURE] = - g_signal_new ("frame-capture", G_TYPE_FROM_CLASS (klass), - G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_capture), - NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_DROP] = - g_signal_new ("frame-drop", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, - G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_drop), NULL, NULL, - g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_INSERT] = - g_signal_new ("frame-insert", G_TYPE_FROM_CLASS (klass), - G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_insert), - NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0); - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_LOST] = - g_signal_new ("frame-lost", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, - G_STRUCT_OFFSET (GstV4lMjpegSrcClass, frame_lost), NULL, NULL, - g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT); - - GST_DEBUG_CATEGORY_INIT (v4lmjpegsrc_debug, "v4lmjpegsrc", 0, - "V4L MJPEG source element"); - gobject_class->set_property = gst_v4lmjpegsrc_set_property; - gobject_class->get_property = gst_v4lmjpegsrc_get_property; - - gstelement_class->change_state = gst_v4lmjpegsrc_change_state; - - gstelement_class->set_clock = gst_v4lmjpegsrc_set_clock; -} - - -static void -gst_v4lmjpegsrc_init (GstV4lMjpegSrc * v4lmjpegsrc) -{ - GstElementClass *klass = GST_ELEMENT_GET_CLASS (v4lmjpegsrc); - - GST_OBJECT_FLAG_SET (GST_ELEMENT (v4lmjpegsrc), GST_ELEMENT_THREAD_SUGGESTED); - - v4lmjpegsrc->srcpad = - gst_pad_new_from_template (gst_element_class_get_pad_template (klass, - "src"), "src"); - gst_element_add_pad (GST_ELEMENT (v4lmjpegsrc), v4lmjpegsrc->srcpad); - - gst_pad_set_get_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_get); - gst_pad_set_getcaps_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_getcaps); - gst_pad_set_link_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_srcconnect); - gst_pad_set_convert_function (v4lmjpegsrc->srcpad, - gst_v4lmjpegsrc_src_convert); - gst_pad_set_formats_function (v4lmjpegsrc->srcpad, - gst_v4lmjpegsrc_get_formats); - gst_pad_set_query_function (v4lmjpegsrc->srcpad, gst_v4lmjpegsrc_src_query); - gst_pad_set_query_type_function (v4lmjpegsrc->srcpad, - gst_v4lmjpegsrc_get_query_types); - -#if 0 - v4lmjpegsrc->frame_width = 0; - v4lmjpegsrc->frame_height = 0; - v4lmjpegsrc->x_offset = -1; - v4lmjpegsrc->y_offset = -1; -#endif - - v4lmjpegsrc->quality = 50; - - v4lmjpegsrc->numbufs = 64; - - /* no clock */ - v4lmjpegsrc->clock = NULL; - - /* fps */ - v4lmjpegsrc->use_fixed_fps = TRUE; - - v4lmjpegsrc->is_capturing = FALSE; -} - - -static gboolean -gst_v4lmjpegsrc_get_fps (GstV4lMjpegSrc * v4lmjpegsrc, GValue * fps) -{ - gint norm; - - g_return_val_if_fail (GST_VALUE_HOLDS_FRACTION (fps), FALSE); - - if (!v4lmjpegsrc->use_fixed_fps && - v4lmjpegsrc->clock != NULL && v4lmjpegsrc->handled > 0) { - /* try to get time from clock master and calculate fps */ - GstClockTime time = - gst_clock_get_time (v4lmjpegsrc->clock) - v4lmjpegsrc->substract_time; - return v4lmjpegsrc->handled * GST_SECOND / time; - } - - /* if that failed ... */ - - if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lmjpegsrc))) - return FALSE; - - if (!gst_v4l_get_chan_norm (GST_V4LELEMENT (v4lmjpegsrc), NULL, &norm)) - return FALSE; - - if (norm == VIDEO_MODE_NTSC) - gst_value_set_fraction (fps, 30000, 1001); - else - gst_value_set_fraction (fps, 25, 1); - - return TRUE; -} - -static gboolean -gst_v4lmjpegsrc_src_convert (GstPad * pad, - GstFormat src_format, - gint64 src_value, GstFormat * dest_format, gint64 * dest_value) -{ - GstV4lMjpegSrc *v4lmjpegsrc; - GValue fps = { 0 }; - gboolean result = TRUE; - - v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad)); - - g_value_init (&fps, GST_VALUE_FRACTION); - if (!gst_v4lmjpegsrc_get_fps (v4lmjpegsrc, &fps)) - return FALSE; - - switch (src_format) { - case GST_FORMAT_TIME: - switch (*dest_format) { - case GST_FORMAT_DEFAULT: - *dest_value = gst_util_uint64_scale (src_value, - gst_value_get_fraction_numerator (&fps), - gst_value_get_fraction_denominator (&fps) * GST_SECOND); - break; - default: - result = FALSE; - } - break; - - case GST_FORMAT_DEFAULT: - switch (*dest_format) { - case GST_FORMAT_TIME: - *dest_value = src_value * gst_util_uint64_scale_int (GST_SECOND, - gst_value_get_fraction_denominator (&fps), - gst_value_get_fraction_numerator (&fps)); - break; - default: - result = FALSE; - } - break; - - default: - result = FALSE; - } - - g_value_unset (&fps); - return result; -} - -static gboolean -gst_v4lmjpegsrc_src_query (GstPad * pad, - GstQueryType type, GstFormat * format, gint64 * value) -{ - GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad)); - gboolean res = TRUE; - GValue fps = { 0 }; - - g_value_init (&fps, GST_VALUE_FRACTION); - if (!gst_v4lmjpegsrc_get_fps (v4lmjpegsrc, &fps)) - return FALSE; - - switch (type) { - case GST_QUERY_POSITION: - switch (*format) { - case GST_FORMAT_TIME: - *value = v4lmjpegsrc->handled * gst_util_uint64_scale_int (GST_SECOND, - gst_value_get_fraction_denominator (&fps), - gst_value_get_fraction_numerator (&fps)); - break; - case GST_FORMAT_DEFAULT: - *value = v4lmjpegsrc->handled; - break; - default: - res = FALSE; - break; - } - break; - default: - res = FALSE; - break; - } - - g_value_unset (&fps); - return res; -} - -static inline gulong -calc_bufsize (int hor_dec, int ver_dec) -{ - guint8 div = hor_dec * ver_dec; - guint32 num = (1024 * 512) / (div); - guint32 result = 2; - - num--; - while (num) { - num >>= 1; - result <<= 1; - } - - if (result > (512 * 1024)) - return (512 * 1024); - if (result < 8192) - return 8192; - return result; -} - -static GstPadLinkReturn -gst_v4lmjpegsrc_srcconnect (GstPad * pad, const GstCaps * caps) -{ - GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad)); - gint hor_dec, ver_dec; - gint w, h; - gint max_w = GST_V4LELEMENT (v4lmjpegsrc)->vcap.maxwidth, - max_h = GST_V4LELEMENT (v4lmjpegsrc)->vcap.maxheight; - gulong bufsize; - GstStructure *structure; - gboolean was_capturing; - - /* in case the buffers are active (which means that we already - * did capsnego before and didn't clean up), clean up anyways */ - if ((was_capturing = v4lmjpegsrc->is_capturing)) { - if (!gst_v4lmjpegsrc_capture_stop (v4lmjpegsrc)) - return GST_PAD_LINK_REFUSED; - } - if (GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc))) { - if (!gst_v4lmjpegsrc_capture_deinit (v4lmjpegsrc)) - return GST_PAD_LINK_REFUSED; - } else if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lmjpegsrc))) { - return GST_PAD_LINK_DELAYED; - } - - /* Note: basically, we don't give a damn about the opposite caps here. - * that might seem odd, but it isn't. we know that the opposite caps is - * either NULL or has mime type image/jpeg, and in both cases, we'll set - * our own mime type back and it'll work. Other properties are to be set - * by the src, not by the opposite caps */ - - structure = gst_caps_get_structure (caps, 0); - gst_structure_get_int (structure, "width", &w); - gst_structure_get_int (structure, "height", &h); - - /* figure out decimation */ - if (w >= max_w) { - hor_dec = 1; - } else if (w * 2 >= max_w) { - hor_dec = 2; - } else { - hor_dec = 4; - } - if (h >= max_h) { - ver_dec = 1; - } else if (h * 2 >= max_h) { - ver_dec = 2; - } else { - ver_dec = 4; - } - - /* calculate bufsize */ - bufsize = calc_bufsize (hor_dec, ver_dec); - - /* set buffer info */ - if (!gst_v4lmjpegsrc_set_buffer (v4lmjpegsrc, v4lmjpegsrc->numbufs, bufsize)) { - return GST_PAD_LINK_REFUSED; - } - - /* set capture parameters and mmap the buffers */ - if (hor_dec == ver_dec) { - if (!gst_v4lmjpegsrc_set_capture (v4lmjpegsrc, - hor_dec, v4lmjpegsrc->quality)) { - return GST_PAD_LINK_REFUSED; - } - } else { - if (!gst_v4lmjpegsrc_set_capture_m (v4lmjpegsrc, - 0, 0, max_w, max_h, hor_dec, ver_dec, v4lmjpegsrc->quality)) { - return GST_PAD_LINK_REFUSED; - } - } -#if 0 - 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_PAD_LINK_REFUSED; - } 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_PAD_LINK_REFUSED; - } -#endif - - if (!gst_v4lmjpegsrc_capture_init (v4lmjpegsrc)) - return GST_PAD_LINK_REFUSED; - - if (was_capturing || GST_STATE (v4lmjpegsrc) == GST_STATE_PLAYING) - if (!gst_v4lmjpegsrc_capture_start (v4lmjpegsrc)) - return GST_PAD_LINK_REFUSED; - - return GST_PAD_LINK_OK; -} - - -static GstData * -gst_v4lmjpegsrc_get (GstPad * pad) -{ - GstV4lMjpegSrc *v4lmjpegsrc; - GstBuffer *buf; - gint num; - GValue fps = { 0 }; - GstClockTime duration; - GstClockTime cur_frame_time; - - g_return_val_if_fail (pad != NULL, NULL); - - v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad)); - - if (v4lmjpegsrc->use_fixed_fps) { - g_value_init (&fps, GST_VALUE_FRACTION); - duration = gst_util_uint64_scale_int (GST_SECOND, - gst_value_get_fraction_denominator (&fps), - gst_value_get_fraction_numerator (&fps)); - cur_frame_time = - gst_util_uint64_scale_int (v4lmjpegsrc->handled * GST_SECOND, - gst_value_get_fraction_denominator (&fps), - gst_value_get_fraction_numerator (&fps)); - - - if (!gst_v4lmjpegsrc_get_fps (v4lmjpegsrc, &fps)) { - g_value_unset (&fps); - return NULL; - } - } - - if (v4lmjpegsrc->need_writes > 0) { - /* use last frame */ - num = v4lmjpegsrc->last_frame; - v4lmjpegsrc->need_writes--; - } else if (v4lmjpegsrc->clock && v4lmjpegsrc->use_fixed_fps) { - GstClockTime time; - gboolean have_frame = FALSE; - - do { - /* by default, we use the frame once */ - v4lmjpegsrc->need_writes = 1; - - /* grab a frame from the device */ - if (!gst_v4lmjpegsrc_grab_frame (v4lmjpegsrc, &num, - &v4lmjpegsrc->last_size)) - return NULL; - - v4lmjpegsrc->last_frame = num; - time = GST_TIMEVAL_TO_TIME (v4lmjpegsrc->bsync.timestamp) - - v4lmjpegsrc->substract_time; - - /* first check whether we lost any frames according to the device */ - if (v4lmjpegsrc->last_seq != 0) { - if (v4lmjpegsrc->bsync.seq - v4lmjpegsrc->last_seq > 1) { - v4lmjpegsrc->need_writes = - v4lmjpegsrc->bsync.seq - v4lmjpegsrc->last_seq; - g_signal_emit (G_OBJECT (v4lmjpegsrc), - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_LOST], 0, - v4lmjpegsrc->bsync.seq - v4lmjpegsrc->last_seq - 1); - } - } - v4lmjpegsrc->last_seq = v4lmjpegsrc->bsync.seq; - - /* decide how often we're going to write the frame - set - * v4lmjpegsrc->need_writes to (that-1) and have_frame to TRUE - * if we're going to write it - else, just continue. - * - * time is generally the system or audio clock. Let's - * say that we've written one second of audio, then we want - * to have written one second of video too, within the same - * timeframe. This means that if time - begin_time = X sec, - * we want to have written X*fps frames. If we've written - * more - drop, if we've written less - dup... */ - if (cur_frame_time - time > 1.5 * duration) { - /* yo dude, we've got too many frames here! Drop! DROP! */ - v4lmjpegsrc->need_writes--; /* -= (v4lmjpegsrc->handled - (time / fps)); */ - g_signal_emit (G_OBJECT (v4lmjpegsrc), - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_DROP], 0); - } else if (cur_frame_time - time < -1.5 * duration) { - /* this means we're lagging far behind */ - v4lmjpegsrc->need_writes++; /* += ((time / fps) - v4lmjpegsrc->handled); */ - g_signal_emit (G_OBJECT (v4lmjpegsrc), - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_INSERT], 0); - } - - if (v4lmjpegsrc->need_writes > 0) { - have_frame = TRUE; - v4lmjpegsrc->use_num_times[num] = v4lmjpegsrc->need_writes; - v4lmjpegsrc->need_writes--; - } else { - gst_v4lmjpegsrc_requeue_frame (v4lmjpegsrc, num); - } - } while (!have_frame); - } else { - /* grab a frame from the device */ - if (!gst_v4lmjpegsrc_grab_frame (v4lmjpegsrc, &num, - &v4lmjpegsrc->last_size)) - return NULL; - - v4lmjpegsrc->use_num_times[num] = 1; - } - - buf = gst_buffer_new (); - GST_BUFFER_FREE_DATA_FUNC (buf) = gst_v4lmjpegsrc_buffer_free; - GST_BUFFER_PRIVATE (buf) = v4lmjpegsrc; - GST_BUFFER_DATA (buf) = gst_v4lmjpegsrc_get_buffer (v4lmjpegsrc, num); - GST_BUFFER_SIZE (buf) = v4lmjpegsrc->last_size; - GST_BUFFER_MAXSIZE (buf) = v4lmjpegsrc->breq.size; - GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY); - GST_BUFFER_FLAG_SET (buf, GST_BUFFER_DONTFREE); - if (v4lmjpegsrc->use_fixed_fps) - GST_BUFFER_TIMESTAMP (buf) = cur_frame_time; - else /* calculate time based on our own clock */ - GST_BUFFER_TIMESTAMP (buf) = - GST_TIMEVAL_TO_TIME (v4lmjpegsrc->bsync.timestamp) - - v4lmjpegsrc->substract_time; - - v4lmjpegsrc->handled++; - g_signal_emit (G_OBJECT (v4lmjpegsrc), - gst_v4lmjpegsrc_signals[SIGNAL_FRAME_CAPTURE], 0); - - return GST_DATA (buf); -} - - -static GstCaps * -gst_v4lmjpegsrc_getcaps (GstPad * pad) -{ - GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (gst_pad_get_parent (pad)); - struct video_capability *vcap = &GST_V4LELEMENT (v4lmjpegsrc)->vcap; - GstCaps *caps; - GstStructure *str; - gint i; - GValue w = { 0 }, h = { - 0}, w1 = { - 0}, h1 = { - 0}, fps = { - 0}; - - if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lmjpegsrc))) { - return gst_caps_copy (gst_pad_get_pad_template_caps (pad)); - } - - g_value_init (&fps, GST_TYPE_FRACTION); - gst_return_val_if_fail (gst_v4lmjpegsrc_get_fps (v4lmjpegsrc, &fps), NULL); - - caps = gst_caps_new_simple ("image/jpeg", NULL); - str = gst_caps_get_structure (caps, 0); - gst_structure_set_value (str, "framerate", &fps); - g_value_unset (&fps); - - g_value_init (&w, GST_TYPE_LIST); - g_value_init (&h, GST_TYPE_LIST); - g_value_init (&w1, G_TYPE_INT); - g_value_init (&h1, G_TYPE_INT); - for (i = 0; i <= 2; i++) { - g_value_set_int (&w1, vcap->maxwidth / (1 << i)); - g_value_set_int (&h1, vcap->maxheight / (1 << i)); - gst_value_list_append_value (&w, &w1); - gst_value_list_append_value (&h, &h1); - } - g_value_unset (&h1); - g_value_unset (&w1); - gst_structure_set_value (str, "width", &w); - gst_structure_set_value (str, "height", &h); - g_value_unset (&w); - g_value_unset (&h); - - return caps; -} - - -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) { -#if 0 - 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; -#endif - case ARG_QUALITY: - v4lmjpegsrc->quality = g_value_get_int (value); - break; - case ARG_NUMBUFS: - v4lmjpegsrc->numbufs = g_value_get_int (value); - break; - case ARG_USE_FIXED_FPS: - if (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc))) { - v4lmjpegsrc->use_fixed_fps = g_value_get_boolean (value); - } - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, 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) { -#if 0 - case ARG_X_OFFSET: - g_value_set_int (value, v4lmjpegsrc->x_offset); - break; - case ARG_Y_OFFSET: - g_value_set_int (value, v4lmjpegsrc->y_offset); - break; - case ARG_F_WIDTH: - g_value_set_int (value, v4lmjpegsrc->frame_width); - break; - case ARG_F_HEIGHT: - g_value_set_int (value, v4lmjpegsrc->frame_height); - break; -#endif - case ARG_QUALITY: - g_value_set_int (value, v4lmjpegsrc->quality); - break; - case ARG_NUMBUFS: - if (GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc))) - g_value_set_int (value, v4lmjpegsrc->breq.count); - else - g_value_set_int (value, v4lmjpegsrc->numbufs); - break; - case ARG_BUFSIZE: - g_value_set_int (value, v4lmjpegsrc->breq.size); - break; - case ARG_USE_FIXED_FPS: - g_value_set_boolean (value, v4lmjpegsrc->use_fixed_fps); - break; - default: - G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); - break; - } -} - - -static GstStateChangeReturn -gst_v4lmjpegsrc_change_state (GstElement * element, GstStateChange transition) -{ - GstV4lMjpegSrc *v4lmjpegsrc; - GTimeVal time; - - g_return_val_if_fail (GST_IS_V4LMJPEGSRC (element), GST_STATE_CHANGE_FAILURE); - - v4lmjpegsrc = GST_V4LMJPEGSRC (element); - - switch (transition) { - case GST_STATE_CHANGE_READY_TO_PAUSED: - /* actual buffer set-up used to be done here - but I moved - * it to capsnego itself */ - v4lmjpegsrc->handled = 0; - v4lmjpegsrc->need_writes = 0; - v4lmjpegsrc->last_frame = 0; - v4lmjpegsrc->substract_time = 0; - break; - case GST_STATE_CHANGE_PAUSED_TO_PLAYING: - /* queue all buffer, start streaming capture */ - if (GST_V4LELEMENT (v4lmjpegsrc)->buffer && - !gst_v4lmjpegsrc_capture_start (v4lmjpegsrc)) - return GST_STATE_CHANGE_FAILURE; - g_get_current_time (&time); - v4lmjpegsrc->substract_time = GST_TIMEVAL_TO_TIME (time) - - v4lmjpegsrc->substract_time; - v4lmjpegsrc->last_seq = 0; - break; - case GST_STATE_CHANGE_PLAYING_TO_PAUSED: - g_get_current_time (&time); - v4lmjpegsrc->substract_time = GST_TIMEVAL_TO_TIME (time) - - v4lmjpegsrc->substract_time; - /* de-queue all queued buffers */ - if (v4lmjpegsrc->is_capturing && - !gst_v4lmjpegsrc_capture_stop (v4lmjpegsrc)) - return GST_STATE_CHANGE_FAILURE; - break; - case GST_STATE_CHANGE_PAUSED_TO_READY: - /* stop capturing, unmap all buffers */ - if (GST_V4LELEMENT (v4lmjpegsrc)->buffer && - !gst_v4lmjpegsrc_capture_deinit (v4lmjpegsrc)) - return GST_STATE_CHANGE_FAILURE; - break; - } - - if (GST_ELEMENT_CLASS (parent_class)->change_state) - return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); - - return GST_STATE_CHANGE_SUCCESS; -} - - -static void -gst_v4lmjpegsrc_set_clock (GstElement * element, GstClock * clock) -{ - GST_V4LMJPEGSRC (element)->clock = clock; -} - - -#if 0 -static GstBuffer * -gst_v4lmjpegsrc_buffer_new (GstBufferPool * pool, - guint64 offset, guint size, gpointer user_data) -{ - GstBuffer *buffer; - GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (user_data); - - if (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lmjpegsrc))) - return NULL; - - buffer = gst_buffer_new (); - if (!buffer) - return NULL; - - /* TODO: add interlacing info to buffer as metadata */ - GST_BUFFER_MAXSIZE (buffer) = v4lmjpegsrc->breq.size; - GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_DONTFREE); - - return buffer; -} -#endif - -static void -gst_v4lmjpegsrc_buffer_free (GstBuffer * buf) -{ - GstV4lMjpegSrc *v4lmjpegsrc = GST_V4LMJPEGSRC (GST_BUFFER_PRIVATE (buf)); - int n; - - if (gst_element_get_state (GST_ELEMENT (v4lmjpegsrc)) != GST_STATE_PLAYING) - return; /* we've already cleaned up ourselves */ - - for (n = 0; n < v4lmjpegsrc->breq.count; n++) - if (GST_BUFFER_DATA (buf) == gst_v4lmjpegsrc_get_buffer (v4lmjpegsrc, n)) { - v4lmjpegsrc->use_num_times[n]--; - if (v4lmjpegsrc->use_num_times[n] <= 0) { - gst_v4lmjpegsrc_requeue_frame (v4lmjpegsrc, n); - } - break; - } - - if (n == v4lmjpegsrc->breq.count) - GST_ELEMENT_ERROR (v4lmjpegsrc, RESOURCE, TOO_LAZY, (NULL), - ("Couldn't find the buffer")); -} |