v4l2object: Add a method to try and import buffers
This method will check if a buffer, base on it's video meta, can be imported. It will also try and adapt the request stride in case this is the only that miss-match. https://bugzilla.gnome.org/show_bug.cgi?id=583890
This commit is contained in:
Nicolas Dufresne
parent
d6d8187345
commit
1c729be537
@ -42,6 +42,7 @@
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#include "gst/gst-i18n-plugin.h"
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#include "gst/gst-i18n-plugin.h"
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#include <gst/video/video.h>
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#include <gst/video/video.h>
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#include <gst/allocators/gstdmabuf.h>
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GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
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GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
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#define GST_CAT_DEFAULT v4l2_debug
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#define GST_CAT_DEFAULT v4l2_debug
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@ -4601,3 +4602,154 @@ different_caps:
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return FALSE;
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return FALSE;
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}
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}
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}
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}
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gboolean
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gst_v4l2_object_try_import (GstV4l2Object * obj, GstBuffer * buffer)
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{
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GstVideoMeta *vmeta;
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guint n_mem = gst_buffer_n_memory (buffer);
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/* only import if requested */
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switch (obj->mode) {
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case GST_V4L2_IO_USERPTR:
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case GST_V4L2_IO_DMABUF_IMPORT:
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break;
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default:
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GST_DEBUG_OBJECT (obj->dbg_obj,
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"The io-mode does not enable importation");
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return FALSE;
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}
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vmeta = gst_buffer_get_video_meta (buffer);
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if (!vmeta && obj->need_video_meta) {
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GST_DEBUG_OBJECT (obj->dbg_obj, "Downstream buffer uses standard "
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"stride/offset while the driver does not.");
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return FALSE;
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}
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/* we need matching strides/offsets and size */
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if (vmeta) {
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guint p;
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gboolean need_fmt_update = FALSE;
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if (vmeta->n_planes != GST_VIDEO_INFO_N_PLANES (&obj->info)) {
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GST_WARNING_OBJECT (obj->dbg_obj,
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"Cannot import buffers with different number planes");
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return FALSE;
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}
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for (p = 0; p < vmeta->n_planes; p++) {
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if (vmeta->stride[p] < obj->info.stride[p]) {
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GST_DEBUG_OBJECT (obj->dbg_obj,
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"Not importing as remote stride %i is smaller then %i on plane %u",
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vmeta->stride[p], obj->info.stride[p], p);
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return FALSE;
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} else if (vmeta->stride[p] > obj->info.stride[p]) {
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need_fmt_update = TRUE;
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}
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if (vmeta->offset[p] < obj->info.offset[p]) {
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GST_DEBUG_OBJECT (obj->dbg_obj,
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"Not importing as offset %" G_GSIZE_FORMAT
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" is smaller then %" G_GSIZE_FORMAT " on plane %u",
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vmeta->offset[p], obj->info.offset[p], p);
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return FALSE;
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} else if (vmeta->offset[p] > obj->info.offset[p]) {
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need_fmt_update = TRUE;
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}
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}
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if (need_fmt_update) {
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struct v4l2_format format;
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gint wanted_stride[GST_VIDEO_MAX_PLANES] = { 0, };
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format = obj->format;
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/* update the current format with the stride we want to import from */
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if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
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guint i;
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GST_DEBUG_OBJECT (obj->dbg_obj, "Wanted strides:");
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for (i = 0; i < obj->n_v4l2_planes; i++) {
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gint stride = vmeta->stride[i];
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if (GST_VIDEO_FORMAT_INFO_IS_TILED (obj->info.finfo))
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stride = GST_VIDEO_TILE_X_TILES (stride) <<
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GST_VIDEO_FORMAT_INFO_TILE_WS (obj->info.finfo);
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format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
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wanted_stride[i] = stride;
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GST_DEBUG_OBJECT (obj->dbg_obj, " [%u] %i", i, wanted_stride[i]);
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}
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} else {
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gint stride = vmeta->stride[0];
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GST_DEBUG_OBJECT (obj->dbg_obj, "Wanted stride: %i", stride);
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if (GST_VIDEO_FORMAT_INFO_IS_TILED (obj->info.finfo))
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stride = GST_VIDEO_TILE_X_TILES (stride) <<
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GST_VIDEO_FORMAT_INFO_TILE_WS (obj->info.finfo);
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format.fmt.pix.bytesperline = stride;
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wanted_stride[0] = stride;
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}
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if (obj->ioctl (obj->video_fd, VIDIOC_S_FMT, &format) < 0) {
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GST_WARNING_OBJECT (obj->dbg_obj,
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"Something went wrong trying to update current format: %s",
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g_strerror (errno));
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return FALSE;
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}
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gst_v4l2_object_save_format (obj, obj->fmtdesc, &format, &obj->info,
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&obj->align);
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if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
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guint i;
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for (i = 0; i < obj->n_v4l2_planes; i++) {
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if (format.fmt.pix_mp.plane_fmt[i].bytesperline != wanted_stride[i]) {
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GST_DEBUG_OBJECT (obj->dbg_obj,
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"[%i] Driver did not accept the new stride (wants %i, got %i)",
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i, format.fmt.pix_mp.plane_fmt[i].bytesperline,
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wanted_stride[i]);
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return FALSE;
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}
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}
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} else {
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if (format.fmt.pix.bytesperline != wanted_stride[0]) {
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GST_DEBUG_OBJECT (obj->dbg_obj,
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"Driver did not accept the new stride (wants %i, got %i)",
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format.fmt.pix.bytesperline, wanted_stride[0]);
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return FALSE;
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}
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}
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}
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}
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/* we can always import single memory buffer, but otherwise we need the same
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* amount of memory object. */
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if (n_mem != 1 && n_mem != obj->n_v4l2_planes) {
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GST_DEBUG_OBJECT (obj->dbg_obj, "Can only import %i memory, "
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"buffers contains %u memory", obj->n_v4l2_planes, n_mem);
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return FALSE;
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}
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/* For DMABuf importation we need DMABuf of course */
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if (obj->mode == GST_V4L2_IO_DMABUF_IMPORT) {
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guint i;
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for (i = 0; i < n_mem; i++) {
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GstMemory *mem = gst_buffer_peek_memory (buffer, i);
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if (!gst_is_dmabuf_memory (mem)) {
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GST_DEBUG_OBJECT (obj->dbg_obj, "Cannot import non-DMABuf memory.");
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return FALSE;
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}
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}
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}
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/* for the remaining, only the kernel driver can tell */
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return TRUE;
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}
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@ -277,6 +277,7 @@ gint gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * finf
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gboolean gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps, GstV4l2Error * error);
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gboolean gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps, GstV4l2Error * error);
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gboolean gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps, GstV4l2Error * error);
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gboolean gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps, GstV4l2Error * error);
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gboolean gst_v4l2_object_try_import (GstV4l2Object * v4l2object, GstBuffer * buffer);
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gboolean gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps);
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gboolean gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps);
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gboolean gst_v4l2_object_caps_is_subset (GstV4l2Object * v4l2object, GstCaps * caps);
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gboolean gst_v4l2_object_caps_is_subset (GstV4l2Object * v4l2object, GstCaps * caps);
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