#include <unistd.h>
#include "gst/video/video.h"
-#include "gst/video/gstmetavideo.h"
+#include "gst/video/gstvideometa.h"
+#include "gst/video/gstvideopool.h"
#include <gstv4l2bufferpool.h>
#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_meta_v4l2_get_info (void)
+gst_v4l2_meta_get_info (void)
{
static const GstMetaInfo *meta_info = NULL;
if (meta_info == NULL) {
meta_info =
- gst_meta_register ("GstMetaV4l2", "GstMetaV4l2",
- sizeof (GstMetaV4l2), (GstMetaInitFunction) NULL,
- (GstMetaFreeFunction) NULL, (GstMetaCopyFunction) NULL,
- (GstMetaTransformFunction) NULL);
+ gst_meta_register (gst_v4l2_meta_api_get_type (), "GstV4l2Meta",
+ sizeof (GstV4l2Meta), (GstMetaInitFunction) NULL,
+ (GstMetaFreeFunction) NULL, (GstMetaTransformFunction) NULL);
}
return meta_info;
}
break;
case GST_V4L2_IO_MMAP:
{
- GstMetaV4l2 *meta;
+ GstV4l2Meta *meta;
gint index;
- meta = GST_META_V4L2_GET (buffer);
+ meta = GST_V4L2_META_GET (buffer);
g_assert (meta != NULL);
index = meta->vbuffer.index;
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;
- GstMetaV4l2 *meta;
+ GstV4l2Meta *meta;
GstV4l2Object *obj;
GstVideoInfo *info;
guint index;
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:
{
newbuf = gst_buffer_new ();
- meta = GST_META_V4L2_ADD (newbuf);
+ meta = GST_V4L2_META_ADD (newbuf);
- index = pool->index;
+ 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 (info->finfo) {
+ if (pool->add_videometa && info->finfo) {
gsize offset[GST_VIDEO_MAX_PLANES];
gint stride[GST_VIDEO_MAX_PLANES];
stride[0] = obj->bytesperline;
GST_DEBUG_OBJECT (pool, "adding video meta, stride %d", stride[0]);
- gst_buffer_add_meta_video_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);
break;
}
- pool->index++;
+ pool->num_allocated++;
*buffer = newbuf;
gst_v4l2_buffer_pool_set_config (GstBufferPool * bpool, GstStructure * config)
{
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
- const GstCaps *caps;
- guint size, min_buffers, max_buffers;
- guint prefix, align;
+ GstV4l2Object *obj = pool->obj;
+ 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");
+ pool->add_videometa =
+ gst_buffer_pool_config_has_option (config,
+ GST_BUFFER_POOL_OPTION_VIDEO_META);
+
+ if (!pool->add_videometa) {
+ gint stride;
+
+ /* we don't have video metadata, see if the strides are compatible */
+ stride = GST_VIDEO_INFO_PLANE_STRIDE (&obj->info, 0);
+
+ GST_DEBUG_OBJECT (pool, "no videometadata, checking strides %d and %u",
+ stride, obj->bytesperline);
+
+ if (stride != obj->bytesperline)
+ goto missing_video_api;
+ }
+
/* 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->min_buffers = min_buffers;
- pool->max_buffers = max_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);
+ /* ERRORS */
+missing_video_api:
+ {
+ GST_ERROR_OBJECT (pool, "missing GstMetaVideo API in config, "
+ "default stride: %d, wanted stride %u",
+ GST_VIDEO_INFO_PLANE_STRIDE (&obj->info, 0), obj->bytesperline);
+ return FALSE;
+ }
wrong_config:
{
- GST_WARNING_OBJECT (pool, "invalid config %" GST_PTR_FORMAT, 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;
}
}
{
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);
-
- 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->index = 0;
+ 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 */
if (!start_streaming (pool))
goto start_failed;
+ gst_poll_set_flushing (obj->poll, FALSE);
+
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");
GST_DEBUG_OBJECT (pool, "stopping pool");
+ gst_poll_set_flushing (obj->poll, TRUE);
+
if (pool->streaming) {
switch (obj->mode) {
case GST_V4L2_IO_RW:
ret = GST_BUFFER_POOL_CLASS (parent_class)->stop (bpool);
/* then free the remaining buffers */
- for (n = 0; n < pool->num_buffers; 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;
+
return ret;
/* ERRORS */
stopped:
{
GST_DEBUG ("stop called");
- return GST_FLOW_WRONG_STATE;
+ return GST_FLOW_FLUSHING;
}
select_error:
{
static GstFlowReturn
gst_v4l2_buffer_pool_qbuf (GstV4l2BufferPool * pool, GstBuffer * buf)
{
- GstMetaV4l2 *meta;
+ GstV4l2Meta *meta;
gint index;
- meta = GST_META_V4L2_GET (buf);
- g_assert (meta != NULL);
+ meta = GST_V4L2_META_GET (buf);
+ 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)
- GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_TFF);
- if (vbuffer.field == V4L2_FIELD_INTERLACED_BT)
- GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_TFF);
+ if (vbuffer.field == V4L2_FIELD_INTERLACED_TB) {
+ GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
+ }
+ 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);
case GST_V4L2_IO_MMAP:
/* just dequeue a buffer, we basically use the queue of v4l2 as the
- * storage for our buffers. */
+ * 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:
break;
case GST_V4L2_IO_MMAP:
- {
- GstBufferPoolParams tparams = { 0, };
-
- if (params)
- tparams = *params;
-
- tparams.flags |= GST_BUFFER_POOL_FLAG_DONTWAIT;
-
- /* first try to get a free unqueued buffer */
+ /* get a free unqueued buffer */
ret = GST_BUFFER_POOL_CLASS (parent_class)->acquire_buffer (bpool,
- buffer, &tparams);
- if (ret == GST_FLOW_UNEXPECTED) {
- GST_DEBUG_OBJECT (pool, "pool empty, try to dequeue a buffer");
- /* all buffers are queued, try to dequeue one */
- ret = gst_v4l2_buffer_pool_dqbuf (pool, buffer);
- }
+ buffer, params);
break;
- }
case GST_V4L2_IO_USERPTR:
default:
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;
}
}
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
- {
- GstMetaV4l2 *meta;
+ switch (obj->mode) {
+ case GST_V4L2_IO_RW:
+ /* release back in the pool */
+ GST_BUFFER_POOL_CLASS (parent_class)->release_buffer (bpool, buffer);
+ break;
- meta = GST_META_V4L2_GET (buffer);
- g_assert (meta != NULL);
+ case GST_V4L2_IO_MMAP:
+ {
+ GstV4l2Meta *meta;
- if (pool->buffers[meta->vbuffer.index] == NULL) {
- GST_LOG_OBJECT (pool, "buffer not queued, putting on free list");
- /* playback, put the buffer back in the queue to refill later. */
- GST_BUFFER_POOL_CLASS (parent_class)->release_buffer (bpool, buffer);
- } else {
- GST_LOG_OBJECT (pool, "buffer is queued");
+ meta = GST_V4L2_META_GET (buffer);
+ g_assert (meta != NULL);
+
+ if (pool->buffers[meta->vbuffer.index] == NULL) {
+ GST_LOG_OBJECT (pool, "buffer not queued, putting on free list");
+ /* playback, put the buffer back in the queue to refill later. */
+ GST_BUFFER_POOL_CLASS (parent_class)->release_buffer (bpool,
+ buffer);
+ } else {
+ /* the buffer is queued in the device but maybe not played yet. We just
+ * leave it there and not make it available for future calls to acquire
+ * for now. The buffer will be dequeued and reused later. */
+ GST_LOG_OBJECT (pool, "buffer is queued");
+ }
+ break;
+ }
+
+ case GST_V4L2_IO_USERPTR:
+ default:
+ g_assert_not_reached ();
+ break;
}
break;
- }
default:
g_assert_not_reached ();
if (pool->video_fd >= 0)
v4l2_close (pool->video_fd);
-
- if (pool->buffers) {
- g_free (pool->buffers);
- pool->buffers = NULL;
- }
+ if (pool->allocator)
+ gst_allocator_unref (pool->allocator);
+ g_free (pool->buffers);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gst_v4l2_buffer_pool_new:
* @obj: the v4l2 object owning the pool
- * @num_buffers: the requested number of buffers in the pool
- * @requeuebuf: if %TRUE, and if the pool is still in the running state, a
- * buffer with no remaining references is immediately passed back to v4l2
- * (VIDIOC_QBUF), otherwise it is returned to the pool of available buffers
- * (which can be accessed via gst_v4l2_buffer_pool_get().
*
* Construct a new buffer pool.
*
- * Returns: the new pool, use gst_v4l2_buffer_pool_destroy() to free resources
+ * Returns: the new pool, use gst_object_unref() to free resources
*/
GstBufferPool *
-gst_v4l2_buffer_pool_new (GstV4l2Object * obj)
+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;
- return GST_BUFFER_POOL_CAST (pool);
+ 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);
/* ERRORS */
dup_failed:
GstFlowReturn res;
GstV4l2Object *obj = pool->obj;
gint amount;
- gpointer data;
- gint buffersize;
+ GstMapInfo map;
+ gint toread;
- buffersize = gst_buffer_get_size (buf);
+ toread = obj->sizeimage;
- GST_LOG_OBJECT (pool, "reading %d bytes into buffer %p", buffersize, buf);
+ 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, buffersize);
+ amount = v4l2_read (obj->video_fd, map.data, toread);
- if (amount == buffersize) {
+ if (amount == toread) {
break;
} else if (amount == -1) {
if (errno == EAGAIN || errno == EINTR) {
} 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;
{
GST_ELEMENT_ERROR (obj->element, RESOURCE, READ,
(_("Error reading %d bytes from device '%s'."),
- buffersize, obj->videodev), GST_ERROR_SYSTEM);
+ toread, obj->videodev), GST_ERROR_SYSTEM);
res = GST_FLOW_ERROR;
goto cleanup;
}
cleanup:
{
- gst_buffer_unmap (buf, data, 0);
+ gst_buffer_unmap (buf, &map);
+ gst_buffer_resize (buf, 0, 0);
return res;
}
}
* Returns: %GST_FLOW_OK on success.
*/
GstFlowReturn
-gst_v4l2_buffer_pool_process (GstBufferPool * bpool, GstBuffer * buf)
+gst_v4l2_buffer_pool_process (GstV4l2BufferPool * pool, GstBuffer * buf)
{
GstFlowReturn ret = GST_FLOW_OK;
- GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
+ GstBufferPool *bpool = GST_BUFFER_POOL_CAST (pool);
GstV4l2Object *obj = pool->obj;
GST_DEBUG_OBJECT (pool, "process buffer %p", buf);
switch (obj->mode) {
case GST_V4L2_IO_RW:
/* FIXME, do write() */
+ GST_WARNING_OBJECT (pool, "implement write()");
break;
case GST_V4L2_IO_MMAP:
if (buf->pool == bpool) {
/* nothing, we can queue directly */
to_queue = buf;
+ GST_LOG_OBJECT (pool, "processing buffer from our pool");
} else {
+ GST_LOG_OBJECT (pool, "alloc buffer from our pool");
+ if (!gst_buffer_pool_is_active (bpool)) {
+ GstStructure *config;
+
+ /* this pool was not activated, configure and activate */
+ GST_DEBUG_OBJECT (pool, "activating pool");
+
+ config = gst_buffer_pool_get_config (bpool);
+ gst_buffer_pool_config_add_option (config,
+ GST_BUFFER_POOL_OPTION_VIDEO_META);
+ gst_buffer_pool_set_config (bpool, config);
+
+ if (!gst_buffer_pool_set_active (bpool, TRUE))
+ goto activate_failed;
+ }
+
+ /* this can block if all buffers are outstanding which would be
+ * strange because we would expect the upstream element to have
+ * allocated them and returned to us.. */
ret = GST_BUFFER_POOL_CLASS (parent_class)->acquire_buffer (bpool,
&to_queue, NULL);
- if (ret == GST_FLOW_UNEXPECTED) {
- GST_DEBUG_OBJECT (pool, "pool empty, try to dequeue a buffer");
- /* all buffers are queued, try to dequeue one */
- ret = gst_v4l2_buffer_pool_dqbuf (pool, &to_queue);
- }
if (ret != GST_FLOW_OK)
- goto done;
+ goto acquire_failed;
/* copy into it and queue */
if (!gst_v4l2_object_copy (obj, to_queue, buf))
if (!pool->streaming)
if (!start_streaming (pool))
goto start_failed;
+
+ if (pool->num_queued == pool->num_allocated) {
+ /* all buffers are queued, try to dequeue one and release it back
+ * into the pool so that _acquire can get to it again. */
+ ret = gst_v4l2_buffer_pool_dqbuf (pool, &to_queue);
+ if (ret != GST_FLOW_OK)
+ goto done;
+
+ /* release the rendered buffer back into the pool. This wakes up any
+ * thread waiting for a buffer in _acquire() */
+ gst_v4l2_buffer_pool_release_buffer (bpool, to_queue);
+ }
break;
}
return ret;
/* ERRORS */
+activate_failed:
+ {
+ GST_ERROR_OBJECT (obj->element, "failed to activate pool");
+ return GST_FLOW_ERROR;
+ }
+acquire_failed:
+ {
+ GST_WARNING_OBJECT (obj->element, "failed to acquire a buffer: %s",
+ gst_flow_get_name (ret));
+ return ret;
+ }
copy_failed:
{
GST_ERROR_OBJECT (obj->element, "failed to copy data");
return GST_FLOW_ERROR;
}
}
-
-/**
- * gst_v4l2_buffer_pool_available_buffers:
- * @pool: the pool
- *
- * Check the number of buffers available to the driver, ie. buffers that
- * have been QBUF'd but not yet DQBUF'd.
- *
- * Returns: the number of buffers available.
- */
-gint
-gst_v4l2_buffer_pool_available_buffers (GstBufferPool * bpool)
-{
- GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
-
- return pool->num_queued;
-}
projects / platform / upstream / gst-plugins-good.git / blobdiff