--- a/gst_plugins_base/sys/v4l/gstv4lsrc.c Wed Mar 31 22:03:18 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,732 +0,0 @@
-/* GStreamer
- *
- * gstv4lsrc.c: BT8x8/V4L source element
- *
- * 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 <sys/time.h>
-#include "v4lsrc_calls.h"
-#include <sys/ioctl.h>
-
-
-static const GstElementDetails gst_v4lsrc_details =
-GST_ELEMENT_DETAILS ("Video (video4linux/raw) Source",
- "Source/Video",
- "Reads raw frames from a video4linux device",
- "Ronald Bultje <rbultje@ronald.bitfreak.net>");
-
-
-GST_DEBUG_CATEGORY_STATIC (v4lsrc_debug);
-#define GST_CAT_DEFAULT v4lsrc_debug
-
-
-enum
-{
- PROP_0,
- PROP_AUTOPROBE,
- PROP_AUTOPROBE_FPS,
- PROP_COPY_MODE,
- PROP_TIMESTAMP_OFFSET
-};
-
-
-GST_BOILERPLATE (GstV4lSrc, gst_v4lsrc, GstV4lElement, GST_TYPE_V4LELEMENT);
-
-
-/* basesrc methods */
-static gboolean gst_v4lsrc_start (GstBaseSrc * src);
-static gboolean gst_v4lsrc_stop (GstBaseSrc * src);
-static gboolean gst_v4lsrc_set_caps (GstBaseSrc * src, GstCaps * caps);
-static GstCaps *gst_v4lsrc_get_caps (GstBaseSrc * src);
-static GstFlowReturn gst_v4lsrc_create (GstPushSrc * src, GstBuffer ** out);
-static gboolean gst_v4lsrc_query (GstBaseSrc * bsrc, GstQuery * query);
-static void gst_v4lsrc_fixate (GstBaseSrc * bsrc, GstCaps * caps);
-
-static void gst_v4lsrc_set_property (GObject * object,
- guint prop_id, const GValue * value, GParamSpec * pspec);
-static void gst_v4lsrc_get_property (GObject * object,
- guint prop_id, GValue * value, GParamSpec * pspec);
-
-
-static void
-gst_v4lsrc_base_init (gpointer g_class)
-{
- GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_details (gstelement_class, &gst_v4lsrc_details);
-
- gst_element_class_add_pad_template (gstelement_class,
- gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
- gst_caps_new_any ()));
-}
-
-static void
-gst_v4lsrc_class_init (GstV4lSrcClass * klass)
-{
- GObjectClass *gobject_class;
- GstBaseSrcClass *basesrc_class;
- GstPushSrcClass *pushsrc_class;
-
- gobject_class = (GObjectClass *) klass;
- basesrc_class = (GstBaseSrcClass *) klass;
- pushsrc_class = (GstPushSrcClass *) klass;
-
- gobject_class->set_property = gst_v4lsrc_set_property;
- gobject_class->get_property = gst_v4lsrc_get_property;
-
- g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_AUTOPROBE,
- g_param_spec_boolean ("autoprobe", "Autoprobe",
- "Whether the device should be probed for all possible features",
- TRUE, G_PARAM_READWRITE));
- g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_AUTOPROBE_FPS,
- g_param_spec_boolean ("autoprobe-fps", "Autoprobe FPS",
- "Whether the device should be probed for framerates",
- TRUE, G_PARAM_READWRITE));
- g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_COPY_MODE,
- g_param_spec_boolean ("copy-mode", "Copy mode",
- "Whether to send out copies of buffers, or direct pointers to the mmap region",
- TRUE, G_PARAM_READWRITE));
- g_object_class_install_property (G_OBJECT_CLASS (klass),
- PROP_TIMESTAMP_OFFSET, g_param_spec_int64 ("timestamp-offset",
- "Timestamp offset",
- "A time offset subtracted from timestamps set on buffers (in ns)",
- G_MININT64, G_MAXINT64, 0, G_PARAM_READWRITE));
-
- GST_DEBUG_CATEGORY_INIT (v4lsrc_debug, "v4lsrc", 0, "V4L source element");
-
- basesrc_class->get_caps = gst_v4lsrc_get_caps;
- basesrc_class->set_caps = gst_v4lsrc_set_caps;
- basesrc_class->start = gst_v4lsrc_start;
- basesrc_class->stop = gst_v4lsrc_stop;
- basesrc_class->fixate = gst_v4lsrc_fixate;
- basesrc_class->query = gst_v4lsrc_query;
-
- pushsrc_class->create = gst_v4lsrc_create;
-}
-
-static void
-gst_v4lsrc_init (GstV4lSrc * v4lsrc, GstV4lSrcClass * klass)
-{
- v4lsrc->buffer_size = 0;
-
- /* no colorspaces */
- v4lsrc->colorspaces = NULL;
-
- v4lsrc->is_capturing = FALSE;
- v4lsrc->autoprobe = TRUE;
- v4lsrc->autoprobe_fps = TRUE;
- v4lsrc->copy_mode = TRUE;
-
- v4lsrc->timestamp_offset = 0;
-
- v4lsrc->fps_list = NULL;
-
- gst_base_src_set_format (GST_BASE_SRC (v4lsrc), GST_FORMAT_TIME);
- gst_base_src_set_live (GST_BASE_SRC (v4lsrc), TRUE);
-}
-
-static void
-gst_v4lsrc_set_property (GObject * object,
- guint prop_id, const GValue * value, GParamSpec * pspec)
-{
- GstV4lSrc *v4lsrc = GST_V4LSRC (object);
-
- switch (prop_id) {
- case PROP_AUTOPROBE:
- g_return_if_fail (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lsrc)));
- v4lsrc->autoprobe = g_value_get_boolean (value);
- break;
- case PROP_AUTOPROBE_FPS:
- g_return_if_fail (!GST_V4L_IS_ACTIVE (GST_V4LELEMENT (v4lsrc)));
- v4lsrc->autoprobe_fps = g_value_get_boolean (value);
- break;
- case PROP_COPY_MODE:
- v4lsrc->copy_mode = g_value_get_boolean (value);
- break;
- case PROP_TIMESTAMP_OFFSET:
- v4lsrc->timestamp_offset = g_value_get_int64 (value);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-
-static void
-gst_v4lsrc_get_property (GObject * object,
- guint prop_id, GValue * value, GParamSpec * pspec)
-{
- GstV4lSrc *v4lsrc = GST_V4LSRC (object);
-
- switch (prop_id) {
- case PROP_AUTOPROBE:
- g_value_set_boolean (value, v4lsrc->autoprobe);
- break;
- case PROP_AUTOPROBE_FPS:
- g_value_set_boolean (value, v4lsrc->autoprobe_fps);
- break;
- case PROP_COPY_MODE:
- g_value_set_boolean (value, v4lsrc->copy_mode);
- break;
- case PROP_TIMESTAMP_OFFSET:
- g_value_set_int64 (value, v4lsrc->timestamp_offset);
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-/* this function is a bit of a last resort */
-static void
-gst_v4lsrc_fixate (GstBaseSrc * bsrc, GstCaps * caps)
-{
- GstStructure *structure;
- int i;
- int targetwidth, targetheight;
- GstV4lSrc *v4lsrc = GST_V4LSRC (bsrc);
- struct video_capability *vcap = &GST_V4LELEMENT (v4lsrc)->vcap;
- struct video_window *vwin = &GST_V4LELEMENT (v4lsrc)->vwin;
-
- if (GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lsrc))) {
- GST_DEBUG_OBJECT (v4lsrc, "device reported w: %d-%d, h: %d-%d",
- vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight);
- targetwidth = vcap->minwidth;
- targetheight = vcap->minheight;
- /* if we can get the current vwin settings, we use those to fixate */
- if (!gst_v4l_get_capabilities (GST_V4LELEMENT (v4lsrc)))
- GST_DEBUG_OBJECT (v4lsrc, "failed getting capabilities");
- else {
- targetwidth = vwin->width;
- targetheight = vwin->height;
- }
- } else {
- GST_DEBUG_OBJECT (v4lsrc, "device closed, guessing");
- targetwidth = 320;
- targetheight = 200;
- }
-
- GST_DEBUG_OBJECT (v4lsrc, "targetting %dx%d", targetwidth, targetheight);
-
- for (i = 0; i < gst_caps_get_size (caps); ++i) {
- const GValue *v;
-
- structure = gst_caps_get_structure (caps, i);
- gst_structure_fixate_field_nearest_int (structure, "width", targetwidth);
- gst_structure_fixate_field_nearest_int (structure, "height", targetheight);
- gst_structure_fixate_field_nearest_fraction (structure, "framerate", 15, 2);
-
- v = gst_structure_get_value (structure, "format");
- if (v && G_VALUE_TYPE (v) != GST_TYPE_FOURCC) {
- guint32 fourcc;
-
- g_return_if_fail (G_VALUE_TYPE (v) == GST_TYPE_LIST);
-
- fourcc = gst_value_get_fourcc (gst_value_list_get_value (v, 0));
- gst_structure_set (structure, "format", GST_TYPE_FOURCC, fourcc, NULL);
- }
- }
-}
-
-static gint all_palettes[] = {
- VIDEO_PALETTE_YUV422,
- VIDEO_PALETTE_YUV420P,
- VIDEO_PALETTE_UYVY,
- VIDEO_PALETTE_YUV411P,
- VIDEO_PALETTE_YUV422P,
- VIDEO_PALETTE_YUV410P,
- VIDEO_PALETTE_YUV411,
- VIDEO_PALETTE_RGB555,
- VIDEO_PALETTE_RGB565,
- VIDEO_PALETTE_RGB24,
- VIDEO_PALETTE_RGB32,
- -1
-};
-
-static GstCaps *
-gst_v4lsrc_palette_to_caps (int palette)
-{
- guint32 fourcc;
- GstCaps *caps;
-
- switch (palette) {
- case VIDEO_PALETTE_YUV422:
- case VIDEO_PALETTE_YUYV:
- fourcc = GST_MAKE_FOURCC ('Y', 'U', 'Y', '2');
- break;
- case VIDEO_PALETTE_YUV420P:
- fourcc = GST_MAKE_FOURCC ('I', '4', '2', '0');
- break;
- case VIDEO_PALETTE_UYVY:
- fourcc = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y');
- break;
- case VIDEO_PALETTE_YUV411P:
- fourcc = GST_MAKE_FOURCC ('Y', '4', '1', 'B');
- break;
- case VIDEO_PALETTE_YUV411:
- fourcc = GST_MAKE_FOURCC ('Y', '4', '1', 'P');
- break;
- case VIDEO_PALETTE_YUV422P:
- fourcc = GST_MAKE_FOURCC ('Y', '4', '2', 'B');
- break;
- case VIDEO_PALETTE_YUV410P:
- fourcc = GST_MAKE_FOURCC ('Y', 'U', 'V', '9');
- break;
- case VIDEO_PALETTE_RGB555:
- case VIDEO_PALETTE_RGB565:
- case VIDEO_PALETTE_RGB24:
- case VIDEO_PALETTE_RGB32:
- fourcc = GST_MAKE_FOURCC ('R', 'G', 'B', ' ');
- break;
- default:
- return NULL;
- }
-
- if (fourcc == GST_MAKE_FOURCC ('R', 'G', 'B', ' ')) {
- switch (palette) {
- case VIDEO_PALETTE_RGB555:
- caps = gst_caps_from_string ("video/x-raw-rgb, "
- "bpp = (int) 16, "
- "depth = (int) 15, "
- "endianness = (int) BYTE_ORDER, "
- "red_mask = 0x7c00, " "green_mask = 0x03e0, " "blue_mask = 0x001f");
- break;
- case VIDEO_PALETTE_RGB565:
- caps = gst_caps_from_string ("video/x-raw-rgb, "
- "bpp = (int) 16, "
- "depth = (int) 16, "
- "endianness = (int) BYTE_ORDER, "
- "red_mask = 0xf800, " "green_mask = 0x07f0, " "blue_mask = 0x001f");
- break;
- case VIDEO_PALETTE_RGB24:
- caps = gst_caps_from_string ("video/x-raw-rgb, "
- "bpp = (int) 24, "
- "depth = (int) 24, "
- "endianness = (int) BIG_ENDIAN, "
- "red_mask = 0xFF0000, "
- "green_mask = 0x00FF00, " "blue_mask = 0x0000FF");
- break;
- case VIDEO_PALETTE_RGB32:
- caps = gst_caps_from_string ("video/x-raw-rgb, "
- "bpp = (int) 32, "
- "depth = (int) 24, "
- "endianness = (int) BIG_ENDIAN, "
- "red_mask = 0xFF000000, "
- "green_mask = 0x00FF0000, " "blue_mask = 0x0000FF00");
- break;
- default:
- g_assert_not_reached ();
- return NULL;
- }
- } else {
- caps = gst_caps_new_simple ("video/x-raw-yuv",
- "format", GST_TYPE_FOURCC, fourcc, NULL);
- }
-
- return caps;
-}
-
-static GstCaps *
-gst_v4lsrc_get_any_caps (void)
-{
- gint i;
- GstCaps *caps = gst_caps_new_empty (), *one;
-
- for (i = 0; all_palettes[i] != -1; i++) {
- one = gst_v4lsrc_palette_to_caps (all_palettes[i]);
- gst_caps_append (caps, one);
- }
-
- return caps;
-}
-
-static GstCaps *
-gst_v4lsrc_get_caps (GstBaseSrc * src)
-{
- GstCaps *list;
- GstV4lSrc *v4lsrc = GST_V4LSRC (src);
- struct video_capability *vcap = &GST_V4LELEMENT (v4lsrc)->vcap;
- gint width = GST_V4LELEMENT (src)->vcap.minwidth;
- gint height = GST_V4LELEMENT (src)->vcap.minheight;
- gint i;
- gint fps_n, fps_d;
- GList *item;
-
- if (!GST_V4L_IS_OPEN (GST_V4LELEMENT (v4lsrc))) {
- return gst_v4lsrc_get_any_caps ();
- }
-
- if (!v4lsrc->autoprobe) {
- /* FIXME: query current caps and return those, with _any appended */
- return gst_v4lsrc_get_any_caps ();
- }
-
- if (!v4lsrc->colorspaces) {
- GST_DEBUG_OBJECT (v4lsrc, "Checking supported palettes");
- for (i = 0; all_palettes[i] != -1; i++) {
- /* try palette out */
- if (!gst_v4lsrc_try_capture (v4lsrc, width, height, all_palettes[i]))
- continue;
- GST_DEBUG_OBJECT (v4lsrc, "Added palette %d (%s) to supported list",
- all_palettes[i], gst_v4lsrc_palette_name (all_palettes[i]));
- v4lsrc->colorspaces = g_list_append (v4lsrc->colorspaces,
- GINT_TO_POINTER (all_palettes[i]));
- }
- GST_DEBUG_OBJECT (v4lsrc, "%d palette(s) supported",
- g_list_length (v4lsrc->colorspaces));
- if (v4lsrc->autoprobe_fps) {
- GST_DEBUG_OBJECT (v4lsrc, "autoprobing framerates");
- v4lsrc->fps_list = gst_v4lsrc_get_fps_list (v4lsrc);
- }
- }
-
-
- if (!gst_v4lsrc_get_fps (v4lsrc, &fps_n, &fps_d)) {
- fps_n = 0;
- fps_d = 1;
- }
-
- list = gst_caps_new_empty ();
- for (item = v4lsrc->colorspaces; item != NULL; item = item->next) {
- GstCaps *one;
-
- one = gst_v4lsrc_palette_to_caps (GPOINTER_TO_INT (item->data));
- if (!one) {
- GST_WARNING_OBJECT (v4lsrc, "Palette %d gave no caps\n",
- GPOINTER_TO_INT (item->data));
- continue;
- }
-
- GST_DEBUG_OBJECT (v4lsrc,
- "Device reports w: %d-%d, h: %d-%d, fps: %d/%d for palette %d",
- vcap->minwidth, vcap->maxwidth, vcap->minheight, vcap->maxheight,
- fps_n, fps_d, GPOINTER_TO_INT (item->data));
-
- if (vcap->minwidth < vcap->maxwidth) {
- gst_caps_set_simple (one, "width", GST_TYPE_INT_RANGE, vcap->minwidth,
- vcap->maxwidth, NULL);
- } else {
- gst_caps_set_simple (one, "width", G_TYPE_INT, vcap->minwidth, NULL);
- }
- if (vcap->minheight < vcap->maxheight) {
- gst_caps_set_simple (one, "height", GST_TYPE_INT_RANGE, vcap->minheight,
- vcap->maxheight, NULL);
- } else {
- gst_caps_set_simple (one, "height", G_TYPE_INT, vcap->minheight, NULL);
- }
-
- if (v4lsrc->autoprobe_fps) {
- GstStructure *structure = gst_caps_get_structure (one, 0);
-
- if (v4lsrc->fps_list) {
- gst_structure_set_value (structure, "framerate", v4lsrc->fps_list);
- } else {
- gst_structure_set (structure, "framerate", GST_TYPE_FRACTION,
- fps_n, fps_d, NULL);
- }
- } else {
- gst_caps_set_simple (one, "framerate", GST_TYPE_FRACTION_RANGE,
- 1, 1, 100, 1, NULL);
- }
-
- GST_DEBUG_OBJECT (v4lsrc, "caps: %" GST_PTR_FORMAT, one);
- gst_caps_append (list, one);
- }
-
- return list;
-}
-
-static gboolean
-gst_v4lsrc_set_caps (GstBaseSrc * src, GstCaps * caps)
-{
- GstV4lSrc *v4lsrc;
- guint32 fourcc;
- gint bpp, depth, w, h, palette = -1;
- const GValue *new_fps;
- gint cur_fps_n, cur_fps_d;
- GstStructure *structure;
- struct video_window *vwin;
-
- v4lsrc = GST_V4LSRC (src);
- vwin = &GST_V4LELEMENT (v4lsrc)->vwin;
-
- /* if we're not open, punt -- we'll get setcaps'd later via negotiate */
- if (!GST_V4L_IS_OPEN (v4lsrc))
- return FALSE;
-
- /* make sure we stop capturing and dealloc buffers */
- if (GST_V4L_IS_ACTIVE (v4lsrc)) {
- if (!gst_v4lsrc_capture_stop (v4lsrc))
- return FALSE;
- if (!gst_v4lsrc_capture_deinit (v4lsrc))
- return FALSE;
- }
-
- /* it's fixed, one struct */
- structure = gst_caps_get_structure (caps, 0);
-
- if (strcmp (gst_structure_get_name (structure), "video/x-raw-yuv") == 0)
- gst_structure_get_fourcc (structure, "format", &fourcc);
- else
- fourcc = GST_MAKE_FOURCC ('R', 'G', 'B', ' ');
-
- gst_structure_get_int (structure, "width", &w);
- gst_structure_get_int (structure, "height", &h);
- new_fps = gst_structure_get_value (structure, "framerate");
-
- /* set framerate if it's not already correct */
- if (!gst_v4lsrc_get_fps (v4lsrc, &cur_fps_n, &cur_fps_d))
- return FALSE;
-
- if (new_fps) {
- GST_DEBUG_OBJECT (v4lsrc, "linking with %dx%d at %d/%d fps", w, h,
- gst_value_get_fraction_numerator (new_fps),
- gst_value_get_fraction_denominator (new_fps));
-
- if (gst_value_get_fraction_numerator (new_fps) != cur_fps_n ||
- gst_value_get_fraction_denominator (new_fps) != cur_fps_d) {
- int fps_index = (gst_value_get_fraction_numerator (new_fps) * 16) /
- (gst_value_get_fraction_denominator (new_fps) * 15);
-
- GST_DEBUG_OBJECT (v4lsrc, "Trying to set fps index %d", fps_index);
- /* set bits 16 to 21 to 0 */
- vwin->flags &= (0x3F00 - 1);
- /* set bits 16 to 21 to the index */
- vwin->flags |= fps_index << 16;
- if (!gst_v4l_set_window_properties (GST_V4LELEMENT (v4lsrc))) {
- return FALSE;
- }
- }
- }
-
- switch (fourcc) {
- case GST_MAKE_FOURCC ('I', '4', '2', '0'):
- palette = VIDEO_PALETTE_YUV420P;
- v4lsrc->buffer_size = ((w + 1) & ~1) * ((h + 1) & ~1) * 1.5;
- break;
- case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
- palette = VIDEO_PALETTE_YUV422;
- v4lsrc->buffer_size = ((w + 1) & ~1) * h * 2;
- break;
- case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
- palette = VIDEO_PALETTE_UYVY;
- v4lsrc->buffer_size = ((w + 1) & ~1) * h * 2;
- break;
- case GST_MAKE_FOURCC ('Y', '4', '1', 'B'):
- palette = VIDEO_PALETTE_YUV411P;
- v4lsrc->buffer_size = ((w + 3) & ~3) * h * 1.5;
- break;
- case GST_MAKE_FOURCC ('Y', '4', '1', 'P'):
- palette = VIDEO_PALETTE_YUV411;
- v4lsrc->buffer_size = ((w + 3) & ~3) * h * 1.5;
- break;
- case GST_MAKE_FOURCC ('Y', 'U', 'V', '9'):
- palette = VIDEO_PALETTE_YUV410P;
- v4lsrc->buffer_size = ((w + 3) & ~3) * ((h + 3) & ~3) * 1.125;
- break;
- case GST_MAKE_FOURCC ('Y', '4', '2', 'B'):
- palette = VIDEO_PALETTE_YUV422P;
- v4lsrc->buffer_size = ((w + 1) & ~1) * h * 2;
- break;
- case GST_MAKE_FOURCC ('R', 'G', 'B', ' '):
- gst_structure_get_int (structure, "depth", &depth);
- switch (depth) {
- case 15:
- palette = VIDEO_PALETTE_RGB555;
- v4lsrc->buffer_size = w * h * 2;
- break;
- case 16:
- palette = VIDEO_PALETTE_RGB565;
- v4lsrc->buffer_size = w * h * 2;
- break;
- case 24:
- gst_structure_get_int (structure, "bpp", &bpp);
- switch (bpp) {
- case 24:
- palette = VIDEO_PALETTE_RGB24;
- v4lsrc->buffer_size = w * h * 3;
- break;
- case 32:
- palette = VIDEO_PALETTE_RGB32;
- v4lsrc->buffer_size = w * h * 4;
- break;
- default:
- break;
- }
- break;
- default:
- break;
- }
- break;
- default:
- break;
- }
-
- if (palette == -1) {
- GST_WARNING_OBJECT (v4lsrc, "palette for fourcc %" GST_FOURCC_FORMAT
- " is -1, refusing link", GST_FOURCC_ARGS (fourcc));
- return FALSE;
- }
-
- GST_DEBUG_OBJECT (v4lsrc, "trying to set_capture %dx%d, palette %d",
- w, h, palette);
- /* this only fills in v4lsrc->mmap values */
- if (!gst_v4lsrc_set_capture (v4lsrc, w, h, palette)) {
- GST_WARNING_OBJECT (v4lsrc, "could not set_capture %dx%d, palette %d",
- w, h, palette);
- return FALSE;
- }
-
- /* first try the negotiated settings using try_capture */
- if (!gst_v4lsrc_try_capture (v4lsrc, w, h, palette)) {
- GST_DEBUG_OBJECT (v4lsrc, "failed trying palette %d for %dx%d", palette,
- w, h);
- return FALSE;
- }
-
- if (!gst_v4lsrc_capture_init (v4lsrc))
- return FALSE;
-
- if (!gst_v4lsrc_capture_start (v4lsrc))
- return FALSE;
-
- return TRUE;
-}
-
-static gboolean
-gst_v4lsrc_query (GstBaseSrc * bsrc, GstQuery * query)
-{
- GstV4lSrc *v4lsrc;
- gboolean res = FALSE;
-
- v4lsrc = GST_V4LSRC (bsrc);
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_LATENCY:
- {
- GstClockTime min_latency, max_latency;
- gint fps_n, fps_d;
-
- /* device must be open */
- if (!GST_V4L_IS_OPEN (v4lsrc))
- goto done;
-
- /* we must have a framerate */
- if (!(res = gst_v4lsrc_get_fps (v4lsrc, &fps_n, &fps_d)))
- goto done;
-
- /* min latency is the time to capture one frame */
- min_latency = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n);
-
- /* max latency is total duration of the frame buffer */
- max_latency = v4lsrc->mbuf.frames * min_latency;
-
- GST_DEBUG_OBJECT (bsrc,
- "report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
- GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
-
- /* we are always live, the min latency is 1 frame and the max latency is
- * the complete buffer of frames. */
- gst_query_set_latency (query, TRUE, min_latency, max_latency);
-
- res = TRUE;
- break;
- }
- default:
- res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
- break;
- }
-done:
- return res;
-}
-
-/* start and stop are not symmetric -- start will open the device, but not start
- capture. it's setcaps that will start capture, which is called via basesrc's
- negotiate method. stop will both stop capture and close the device.
- */
-static gboolean
-gst_v4lsrc_start (GstBaseSrc * src)
-{
- GstV4lSrc *v4lsrc = GST_V4LSRC (src);
-
- if (!GST_BASE_SRC_CLASS (parent_class)->start (src))
- return FALSE;
-
- v4lsrc->offset = 0;
-
- return TRUE;
-}
-
-static gboolean
-gst_v4lsrc_stop (GstBaseSrc * src)
-{
- GstV4lSrc *v4lsrc = GST_V4LSRC (src);
-
- if (GST_V4L_IS_ACTIVE (v4lsrc) && !gst_v4lsrc_capture_stop (v4lsrc))
- return FALSE;
-
- if (GST_V4LELEMENT (v4lsrc)->buffer != NULL) {
- if (!gst_v4lsrc_capture_deinit (v4lsrc))
- return FALSE;
- }
-
- if (!GST_BASE_SRC_CLASS (parent_class)->stop (src))
- return FALSE;
-
- g_list_free (v4lsrc->colorspaces);
- v4lsrc->colorspaces = NULL;
-
- if (v4lsrc->fps_list) {
- g_value_unset (v4lsrc->fps_list);
- g_free (v4lsrc->fps_list);
- v4lsrc->fps_list = NULL;
- }
-
- return TRUE;
-}
-
-static GstFlowReturn
-gst_v4lsrc_create (GstPushSrc * src, GstBuffer ** buf)
-{
- GstV4lSrc *v4lsrc;
- gint num;
-
- v4lsrc = GST_V4LSRC (src);
-
- /* grab a frame from the device */
- if (!gst_v4lsrc_grab_frame (v4lsrc, &num))
- return GST_FLOW_ERROR;
-
- *buf = gst_v4lsrc_buffer_new (v4lsrc, num);
-
- if (v4lsrc->copy_mode) {
- GstBuffer *copy = gst_buffer_copy (*buf);
-
- gst_buffer_unref (*buf);
- *buf = copy;
- }
-
- return GST_FLOW_OK;
-}