#include "gstv4l2sink.h"
#include "v4l2_calls.h"
#include "gst/gst-i18n-plugin.h"
+#include <gst/glib-compat-private.h>
/* videodev2.h is not versioned and we can't easily check for the presence
* of enum values at compile time, but the V4L2_CAP_VIDEO_OUTPUT_OVERLAY define
/*
* GstV4l2Buffer:
*/
+GType
+gst_v4l2_meta_api_get_type (void)
+{
+ static volatile GType type;
+ static const gchar *tags[] = { "memory", NULL };
+
+ if (g_once_init_enter (&type)) {
+ GType _type = gst_meta_api_type_register ("GstV4l2MetaAPI", tags);
+ g_once_init_leave (&type, _type);
+ }
+ return type;
+}
+
const GstMetaInfo *
gst_v4l2_meta_get_info (void)
{
if (meta_info == NULL) {
meta_info =
- gst_meta_register ("GstV4l2Meta", "GstV4l2Meta",
+ gst_meta_register (gst_v4l2_meta_api_get_type (), "GstV4l2Meta",
sizeof (GstV4l2Meta), (GstMetaInitFunction) NULL,
- (GstMetaFreeFunction) NULL, (GstMetaCopyFunction) NULL,
- (GstMetaTransformFunction) NULL);
+ (GstMetaFreeFunction) NULL, (GstMetaTransformFunction) NULL);
}
return meta_info;
}
static GstFlowReturn
gst_v4l2_buffer_pool_alloc_buffer (GstBufferPool * bpool, GstBuffer ** buffer,
- GstBufferPoolParams * params)
+ GstBufferPoolAcquireParams * params)
{
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
GstBuffer *newbuf;
case GST_V4L2_IO_RW:
{
newbuf =
- gst_buffer_new_allocate (pool->allocator, pool->size, pool->align);
+ gst_buffer_new_allocate (pool->allocator, pool->size, &pool->params);
break;
}
case GST_V4L2_IO_MMAP:
index = pool->num_allocated;
- GST_LOG_OBJECT (pool, "creating buffer %u, %p", index, newbuf, pool);
+ GST_LOG_OBJECT (pool, "creating buffer %u, %p", index, newbuf);
meta->vbuffer.index = index;
meta->vbuffer.type = obj->type;
if (meta->mem == MAP_FAILED)
goto mmap_failed;
- gst_buffer_take_memory (newbuf, -1,
- gst_memory_new_wrapped (0,
- meta->mem, NULL, meta->vbuffer.length, 0, meta->vbuffer.length));
+ gst_buffer_append_memory (newbuf,
+ gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE,
+ meta->mem, meta->vbuffer.length, 0, meta->vbuffer.length, NULL,
+ NULL));
/* add metadata to raw video buffers */
if (pool->add_videometa && info->finfo) {
stride[0] = obj->bytesperline;
GST_DEBUG_OBJECT (pool, "adding video meta, stride %d", stride[0]);
- gst_buffer_add_video_meta_full (newbuf, info->flags,
+ gst_buffer_add_video_meta_full (newbuf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),
GST_VIDEO_INFO_HEIGHT (info), GST_VIDEO_INFO_N_PLANES (info),
offset, stride);
{
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
GstV4l2Object *obj = pool->obj;
- const GstCaps *caps;
- guint size, min_buffers, max_buffers;
- guint prefix, align;
+ GstCaps *caps;
+ guint size, min_buffers, max_buffers, num_buffers, copy_threshold;
+ GstAllocator *allocator;
+ GstAllocationParams params;
+ struct v4l2_requestbuffers breq;
GST_DEBUG_OBJECT (pool, "set config");
}
/* parse the config and keep around */
- if (!gst_buffer_pool_config_get (config, &caps, &size, &min_buffers,
- &max_buffers, &prefix, &align))
+ if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,
+ &max_buffers))
+ goto wrong_config;
+
+ if (!gst_buffer_pool_config_get_allocator (config, &allocator, ¶ms))
goto wrong_config;
GST_DEBUG_OBJECT (pool, "config %" GST_PTR_FORMAT, config);
+ switch (obj->mode) {
+ case GST_V4L2_IO_RW:
+ /* we preallocate 1 buffer, this value also instructs the latency
+ * calculation to have 1 frame latency max */
+ num_buffers = 1;
+ copy_threshold = 0;
+ break;
+ case GST_V4L2_IO_MMAP:
+ {
+ /* request a reasonable number of buffers when no max specified. We will
+ * copy when we run out of buffers */
+ if (max_buffers == 0)
+ num_buffers = 4;
+ else
+ num_buffers = max_buffers;
+
+ /* first, lets request buffers, and see how many we can get: */
+ GST_DEBUG_OBJECT (pool, "starting, requesting %d MMAP buffers",
+ num_buffers);
+
+ memset (&breq, 0, sizeof (struct v4l2_requestbuffers));
+ breq.type = obj->type;
+ breq.count = num_buffers;
+ breq.memory = V4L2_MEMORY_MMAP;
+
+ if (v4l2_ioctl (pool->video_fd, VIDIOC_REQBUFS, &breq) < 0)
+ goto reqbufs_failed;
+
+ GST_LOG_OBJECT (pool, " count: %u", breq.count);
+ GST_LOG_OBJECT (pool, " type: %d", breq.type);
+ GST_LOG_OBJECT (pool, " memory: %d", breq.memory);
+
+ if (breq.count < GST_V4L2_MIN_BUFFERS)
+ goto no_buffers;
+
+ if (num_buffers != breq.count) {
+ GST_WARNING_OBJECT (pool, "using %u buffers instead", breq.count);
+ num_buffers = breq.count;
+ }
+ /* update min buffers with the amount of buffers we just reserved. We need
+ * to configure this value in the bufferpool so that the default start
+ * implementation calls our allocate function */
+ min_buffers = breq.count;
+
+ if (max_buffers == 0 || num_buffers < max_buffers) {
+ /* if we are asked to provide more buffers than we have allocated, start
+ * copying buffers when we only have 2 buffers left in the pool */
+ copy_threshold = 2;
+ } else {
+ /* we are certain that we have enough buffers so we don't need to
+ * copy */
+ copy_threshold = 0;
+ }
+ break;
+ }
+ case GST_V4L2_IO_USERPTR:
+ default:
+ num_buffers = 0;
+ copy_threshold = 0;
+ g_assert_not_reached ();
+ break;
+ }
+
pool->size = size;
- pool->max_buffers = MAX (min_buffers, max_buffers);
- pool->min_buffers = MIN (pool->max_buffers, min_buffers);
- pool->prefix = prefix;
- pool->align = align;
+ pool->num_buffers = num_buffers;
+ pool->copy_threshold = copy_threshold;
+ if (pool->allocator)
+ gst_allocator_unref (pool->allocator);
+ if ((pool->allocator = allocator))
+ gst_allocator_ref (allocator);
+ pool->params = params;
- gst_buffer_pool_config_set (config, caps, size, min_buffers,
- max_buffers, prefix, align);
+ gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
+ max_buffers);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (bpool, config);
GST_ERROR_OBJECT (pool, "invalid config %" GST_PTR_FORMAT, config);
return FALSE;
}
+reqbufs_failed:
+ {
+ GST_ERROR_OBJECT (pool,
+ "error requesting %d buffers: %s", num_buffers, g_strerror (errno));
+ return FALSE;
+ }
+no_buffers:
+ {
+ GST_ERROR_OBJECT (pool,
+ "we received %d from device '%s', we want at least %d",
+ breq.count, obj->videodev, GST_V4L2_MIN_BUFFERS);
+ return FALSE;
+ }
}
static gboolean
{
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
GstV4l2Object *obj = pool->obj;
- gint n;
- struct v4l2_requestbuffers breq;
- gint min_buffers, max_buffers;
-
- min_buffers = pool->min_buffers;
- max_buffers = pool->max_buffers;
-
- switch (obj->mode) {
- case GST_V4L2_IO_RW:
- {
- break;
- }
- case GST_V4L2_IO_MMAP:
- {
- /* first, lets request buffers, and see how many we can get: */
- GST_DEBUG_OBJECT (pool, "starting, requesting %d MMAP buffers",
- max_buffers);
-
- if (max_buffers == 0)
- max_buffers = 4;
-
- memset (&breq, 0, sizeof (struct v4l2_requestbuffers));
- breq.type = obj->type;
- breq.count = max_buffers;
- breq.memory = V4L2_MEMORY_MMAP;
-
- if (v4l2_ioctl (pool->video_fd, VIDIOC_REQBUFS, &breq) < 0)
- goto reqbufs_failed;
-
- GST_LOG_OBJECT (pool, " count: %u", breq.count);
- GST_LOG_OBJECT (pool, " type: %d", breq.type);
- GST_LOG_OBJECT (pool, " memory: %d", breq.memory);
-
- if (breq.count < GST_V4L2_MIN_BUFFERS)
- goto no_buffers;
-
- if (max_buffers != breq.count) {
- GST_WARNING_OBJECT (pool, "using %u buffers instead", breq.count);
- max_buffers = breq.count;
- }
- break;
- }
- case GST_V4L2_IO_USERPTR:
- default:
- g_assert_not_reached ();
- break;
- }
pool->obj = obj;
- pool->max_buffers = max_buffers;
- pool->buffers = g_new0 (GstBuffer *, max_buffers);
+ pool->buffers = g_new0 (GstBuffer *, pool->num_buffers);
pool->num_allocated = 0;
/* now, allocate the buffers: */
- for (n = 0; n < min_buffers; n++) {
- GstBuffer *buffer;
-
- if (gst_v4l2_buffer_pool_alloc_buffer (bpool, &buffer, NULL) != GST_FLOW_OK)
- goto buffer_new_failed;
-
- gst_v4l2_buffer_pool_release_buffer (bpool, buffer);
- }
+ if (!GST_BUFFER_POOL_CLASS (parent_class)->start (bpool))
+ goto start_failed;
/* we can start capturing now, we wait for the playback case until we queued
* the first buffer */
return TRUE;
/* ERRORS */
-reqbufs_failed:
- {
- GST_ERROR_OBJECT (pool,
- "error requesting %d buffers: %s", max_buffers, g_strerror (errno));
- return FALSE;
- }
-no_buffers:
- {
- GST_ERROR_OBJECT (pool,
- "we received %d from device '%s', we want at least %d",
- breq.count, obj->videodev, GST_V4L2_MIN_BUFFERS);
- return FALSE;
- }
-buffer_new_failed:
- {
- GST_ERROR_OBJECT (pool, "failed to create a buffer");
- return FALSE;
- }
start_failed:
{
GST_ERROR_OBJECT (pool, "failed to start streaming");
ret = GST_BUFFER_POOL_CLASS (parent_class)->stop (bpool);
/* then free the remaining buffers */
- for (n = 0; n < pool->num_allocated; n++) {
- if (pool->buffers[n])
- gst_v4l2_buffer_pool_free_buffer (bpool, pool->buffers[n]);
+ for (n = 0; n < pool->num_queued; n++) {
+ gst_v4l2_buffer_pool_free_buffer (bpool, pool->buffers[n]);
}
g_free (pool->buffers);
pool->buffers = NULL;
stopped:
{
GST_DEBUG ("stop called");
- return GST_FLOW_WRONG_STATE;
+ return GST_FLOW_FLUSHING;
}
select_error:
{
gint index;
meta = GST_V4L2_META_GET (buf);
- g_assert (meta != NULL);
+ if (meta == NULL) {
+ GST_LOG_OBJECT (pool, "unref copied buffer %p", buf);
+ /* no meta, it was a copied buffer that we can unref */
+ gst_buffer_unref (buf);
+ return GST_FLOW_OK;
+ }
index = meta->vbuffer.index;
- GST_LOG_OBJECT (pool, "enqueue buffer %p, index:%d, queued:%d", buf,
- index, pool->num_queued);
+ GST_LOG_OBJECT (pool, "enqueue buffer %p, index:%d, queued:%d, flags:%08x",
+ buf, index, pool->num_queued, meta->vbuffer.flags);
if (pool->buffers[index] != NULL)
goto already_queued;
+ GST_LOG_OBJECT (pool, "doing QBUF");
if (v4l2_ioctl (pool->video_fd, VIDIOC_QBUF, &meta->vbuffer) < 0)
goto queue_failed;
GstBuffer *outbuf;
struct v4l2_buffer vbuffer;
GstV4l2Object *obj = pool->obj;
+ GstClockTime timestamp;
if (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
/* select works for input devices when data is available. According to the
pool->buffers[vbuffer.index] = NULL;
pool->num_queued--;
+ timestamp = GST_TIMEVAL_TO_TIME (vbuffer.timestamp);
+
GST_LOG_OBJECT (pool,
- "dequeued buffer %p seq:%d (ix=%d), used %d, flags %08x, pool-queued=%d, buffer=%p",
- outbuf, vbuffer.sequence, vbuffer.index, vbuffer.bytesused, vbuffer.flags,
- pool->num_queued, outbuf);
+ "dequeued buffer %p seq:%d (ix=%d), used %d, flags %08x, ts %"
+ GST_TIME_FORMAT ", pool-queued=%d, buffer=%p", outbuf, vbuffer.sequence,
+ vbuffer.index, vbuffer.bytesused, vbuffer.flags,
+ GST_TIME_ARGS (timestamp), pool->num_queued, outbuf);
/* set top/bottom field first if v4l2_buffer has the information */
- if (vbuffer.field == V4L2_FIELD_INTERLACED_TB)
+ if (vbuffer.field == V4L2_FIELD_INTERLACED_TB) {
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
- if (vbuffer.field == V4L2_FIELD_INTERLACED_BT)
+ }
+ if (vbuffer.field == V4L2_FIELD_INTERLACED_BT) {
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
+ }
/* this can change at every frame, esp. with jpeg */
if (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
else
gst_buffer_resize (outbuf, 0, vbuffer.length);
+ GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
+
*buffer = outbuf;
return GST_FLOW_OK;
static GstFlowReturn
gst_v4l2_buffer_pool_acquire_buffer (GstBufferPool * bpool, GstBuffer ** buffer,
- GstBufferPoolParams * params)
+ GstBufferPoolAcquireParams * params)
{
GstFlowReturn ret;
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
* storage for our buffers. This function does poll first so we can
* interrupt it fine. */
ret = gst_v4l2_buffer_pool_dqbuf (pool, buffer);
+ if (G_UNLIKELY (ret != GST_FLOW_OK))
+ goto done;
+
+ /* start copying buffers when we are running low on buffers */
+ if (pool->num_queued < pool->copy_threshold) {
+ GstBuffer *copy;
+
+ /* copy the memory */
+ copy = gst_buffer_copy (*buffer);
+ GST_LOG_OBJECT (pool, "copy buffer %p->%p", *buffer, copy);
+
+ /* and requeue so that we can continue capturing */
+ ret = gst_v4l2_buffer_pool_qbuf (pool, *buffer);
+ *buffer = copy;
+ }
break;
case GST_V4L2_IO_USERPTR:
g_assert_not_reached ();
break;
}
+done:
return ret;
/* ERRORS */
flushing:
{
GST_DEBUG_OBJECT (pool, "We are flushing");
- return GST_FLOW_WRONG_STATE;
+ return GST_FLOW_FLUSHING;
}
}
if (pool->video_fd >= 0)
v4l2_close (pool->video_fd);
-
+ if (pool->allocator)
+ gst_allocator_unref (pool->allocator);
g_free (pool->buffers);
G_OBJECT_CLASS (parent_class)->finalize (object);
gst_v4l2_buffer_pool_new (GstV4l2Object * obj, GstCaps * caps)
{
GstV4l2BufferPool *pool;
+ GstStructure *s;
gint fd;
fd = v4l2_dup (obj->video_fd);
pool->video_fd = fd;
pool->obj = obj;
- gst_buffer_pool_config_set (GST_BUFFER_POOL_CAST (pool)->config, caps,
- obj->sizeimage, 2, 0, 0, 0);
+ s = gst_buffer_pool_get_config (GST_BUFFER_POOL_CAST (pool));
+ gst_buffer_pool_config_set_params (s, caps, obj->sizeimage, 2, 0);
+ gst_buffer_pool_set_config (GST_BUFFER_POOL_CAST (pool), s);
return GST_BUFFER_POOL (pool);
GstFlowReturn res;
GstV4l2Object *obj = pool->obj;
gint amount;
- gpointer data;
+ GstMapInfo map;
gint toread;
toread = obj->sizeimage;
GST_LOG_OBJECT (pool, "reading %d bytes into buffer %p", toread, buf);
- data = gst_buffer_map (buf, NULL, NULL, GST_MAP_WRITE);
+ gst_buffer_map (buf, &map, GST_MAP_WRITE);
do {
if ((res = gst_v4l2_object_poll (obj)) != GST_FLOW_OK)
goto poll_error;
- amount = v4l2_read (obj->video_fd, data, toread);
+ amount = v4l2_read (obj->video_fd, map.data, toread);
if (amount == toread) {
break;
} while (TRUE);
GST_LOG_OBJECT (pool, "read %d bytes", amount);
- gst_buffer_unmap (buf, data, amount);
+ gst_buffer_unmap (buf, &map);
+ gst_buffer_resize (buf, 0, amount);
return GST_FLOW_OK;
}
cleanup:
{
- gst_buffer_unmap (buf, data, 0);
+ gst_buffer_unmap (buf, &map);
+ gst_buffer_resize (buf, 0, 0);
return res;
}
}
projects / platform / upstream / gst-plugins-good.git / blobdiff