mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-23 18:21:04 +00:00
v4l2: convert to GstBufferPool
Extend from GstBufferPool. Handle the lifetime of the pool buffers correctly with the start/stop vmethods. Map acquire and release directly to QBUF and DQBUF. We still expose an explicit qbuf for the v4l2sink for now.
This commit is contained in:
Wim Taymans
parent
0f16daed15
commit
21f532ae10
4 changed files with 380 additions and 408 deletions
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@ -34,6 +34,7 @@
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#include "gst/video/gstmetavideo.h"
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#include <gstv4l2bufferpool.h>
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#include "gstv4l2src.h"
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#include "gstv4l2sink.h"
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#include "v4l2_calls.h"
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@ -69,11 +70,16 @@ gst_meta_v4l2_get_info (void)
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return meta_info;
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}
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/*
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* GstV4l2BufferPool:
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*/
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#define gst_v4l2_buffer_pool_parent_class parent_class
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G_DEFINE_TYPE (GstV4l2BufferPool, gst_v4l2_buffer_pool, GST_TYPE_BUFFER_POOL);
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static void
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gst_v4l2_buffer_dispose (GstBuffer * buffer)
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gst_v4l2_buffer_pool_free_buffer (GstBufferPool * bpool, GstBuffer * buffer)
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{
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GstV4l2BufferPool *pool;
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gboolean resuscitated = FALSE;
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GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
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gint index;
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GstMetaV4l2 *meta;
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GstV4l2Object *obj;
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@ -81,90 +87,58 @@ gst_v4l2_buffer_dispose (GstBuffer * buffer)
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meta = GST_META_V4L2_GET (buffer);
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g_assert (meta != NULL);
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pool = meta->pool;
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index = meta->vbuffer.index;
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obj = pool->obj;
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GST_LOG_OBJECT (obj->element, "finalizing buffer %p %d", buffer, index);
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index = meta->vbuffer.index;
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GST_LOG_OBJECT (pool, "finalizing buffer %p %d", buffer, index);
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pool->buffers[index] = NULL;
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GST_V4L2_BUFFER_POOL_LOCK (pool);
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if (pool->running) {
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if (pool->requeuebuf) {
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if (!gst_v4l2_buffer_pool_qbuf (pool, buffer)) {
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GST_WARNING_OBJECT (obj->element, "could not requeue buffer %p %d",
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buffer, index);
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} else {
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resuscitated = TRUE;
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}
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} else {
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resuscitated = TRUE;
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/* XXX double check this... I think it is ok to not synchronize this
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* w.r.t. destruction of the pool, since the buffer is still live and
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* the buffer holds a ref to the pool..
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*/
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g_async_queue_push (pool->avail_buffers, buffer);
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}
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} else {
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GST_LOG_OBJECT (obj->element, "the pool is shutting down");
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}
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GST_LOG_OBJECT (pool,
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"buffer %p (data %p, len %u) freed, unmapping",
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buffer, meta->mem, meta->vbuffer.length);
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v4l2_munmap (meta->mem, meta->vbuffer.length);
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if (resuscitated) {
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GST_LOG_OBJECT (obj->element, "reviving buffer %p, %d", buffer, index);
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gst_buffer_ref (buffer);
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pool->buffers[index] = buffer;
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}
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GST_V4L2_BUFFER_POOL_UNLOCK (pool);
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if (!resuscitated) {
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GST_LOG_OBJECT (obj->element,
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"buffer %p (data %p, len %u) not recovered, unmapping",
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buffer, meta->mem, meta->vbuffer.length);
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v4l2_munmap (meta->mem, meta->vbuffer.length);
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g_object_unref (pool);
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}
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gst_buffer_unref (buffer);
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}
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static GstBuffer *
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gst_v4l2_buffer_new (GstV4l2BufferPool * pool, guint index)
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static GstFlowReturn
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gst_v4l2_buffer_pool_alloc_buffer (GstBufferPool * bpool, GstBuffer ** buffer,
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GstBufferPoolParams * params)
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{
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GstBuffer *ret;
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GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
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GstBuffer *newbuf;
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GstMetaV4l2 *meta;
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GstV4l2Object *obj;
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GstVideoInfo *info;
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guint index;
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obj = pool->obj;
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info = &obj->info;
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ret = gst_buffer_new ();
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GST_MINI_OBJECT_CAST (ret)->dispose =
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(GstMiniObjectDisposeFunction) gst_v4l2_buffer_dispose;
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newbuf = gst_buffer_new ();
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meta = GST_META_V4L2_ADD (newbuf);
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meta = GST_META_V4L2_ADD (ret);
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index = pool->index;
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GST_LOG_OBJECT (obj->element, "creating buffer %u, %p in pool %p", index,
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ret, pool);
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meta->pool = (GstV4l2BufferPool *) g_object_ref (pool);
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GST_LOG_OBJECT (pool, "creating buffer %u, %p", index, newbuf, pool);
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meta->vbuffer.index = index;
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meta->vbuffer.type = pool->type;
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meta->vbuffer.type = obj->type;
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meta->vbuffer.memory = V4L2_MEMORY_MMAP;
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if (v4l2_ioctl (pool->video_fd, VIDIOC_QUERYBUF, &meta->vbuffer) < 0)
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goto querybuf_failed;
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GST_LOG_OBJECT (obj->element, " index: %u", meta->vbuffer.index);
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GST_LOG_OBJECT (obj->element, " type: %d", meta->vbuffer.type);
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GST_LOG_OBJECT (obj->element, " bytesused: %u", meta->vbuffer.bytesused);
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GST_LOG_OBJECT (obj->element, " flags: %08x", meta->vbuffer.flags);
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GST_LOG_OBJECT (obj->element, " field: %d", meta->vbuffer.field);
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GST_LOG_OBJECT (obj->element, " memory: %d", meta->vbuffer.memory);
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GST_LOG_OBJECT (pool, " index: %u", meta->vbuffer.index);
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GST_LOG_OBJECT (pool, " type: %d", meta->vbuffer.type);
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GST_LOG_OBJECT (pool, " bytesused: %u", meta->vbuffer.bytesused);
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GST_LOG_OBJECT (pool, " flags: %08x", meta->vbuffer.flags);
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GST_LOG_OBJECT (pool, " field: %d", meta->vbuffer.field);
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GST_LOG_OBJECT (pool, " memory: %d", meta->vbuffer.memory);
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if (meta->vbuffer.memory == V4L2_MEMORY_MMAP)
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GST_LOG_OBJECT (obj->element, " MMAP offset: %u", meta->vbuffer.m.offset);
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GST_LOG_OBJECT (obj->element, " length: %u", meta->vbuffer.length);
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GST_LOG_OBJECT (obj->element, " input: %u", meta->vbuffer.input);
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GST_LOG_OBJECT (pool, " MMAP offset: %u", meta->vbuffer.m.offset);
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GST_LOG_OBJECT (pool, " length: %u", meta->vbuffer.length);
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GST_LOG_OBJECT (pool, " input: %u", meta->vbuffer.input);
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meta->mem = v4l2_mmap (0, meta->vbuffer.length,
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PROT_READ | PROT_WRITE, MAP_SHARED, pool->video_fd,
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@ -172,7 +146,7 @@ gst_v4l2_buffer_new (GstV4l2BufferPool * pool, guint index)
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if (meta->mem == MAP_FAILED)
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goto mmap_failed;
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gst_buffer_take_memory (ret, -1,
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gst_buffer_take_memory (newbuf, -1,
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gst_memory_new_wrapped (0,
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meta->mem, NULL, meta->vbuffer.length, 0, meta->vbuffer.length));
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@ -184,13 +158,18 @@ gst_v4l2_buffer_new (GstV4l2BufferPool * pool, guint index)
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offset[0] = 0;
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stride[0] = obj->bytesperline;
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GST_DEBUG ("adding video meta");
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gst_buffer_add_meta_video_full (ret, info->flags,
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GST_DEBUG_OBJECT (pool, "adding video meta");
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gst_buffer_add_meta_video_full (newbuf, info->flags,
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GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),
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GST_VIDEO_INFO_HEIGHT (info), GST_VIDEO_INFO_N_PLANES (info),
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offset, stride);
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}
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return ret;
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pool->index++;
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*buffer = newbuf;
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return GST_FLOW_OK;
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/* ERRORS */
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querybuf_failed:
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@ -198,38 +177,270 @@ querybuf_failed:
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gint errnosave = errno;
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GST_WARNING ("Failed QUERYBUF: %s", g_strerror (errnosave));
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gst_buffer_unref (ret);
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gst_buffer_unref (newbuf);
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errno = errnosave;
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return NULL;
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return GST_FLOW_ERROR;
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}
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mmap_failed:
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{
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gint errnosave = errno;
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GST_WARNING ("Failed to mmap: %s", g_strerror (errnosave));
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gst_buffer_unref (ret);
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gst_buffer_unref (newbuf);
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errno = errnosave;
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return NULL;
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return GST_FLOW_ERROR;
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}
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}
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/*
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* GstV4l2BufferPool:
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*/
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#define gst_v4l2_buffer_pool_parent_class parent_class
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G_DEFINE_TYPE (GstV4l2BufferPool, gst_v4l2_buffer_pool, G_TYPE_OBJECT);
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static gboolean
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gst_v4l2_buffer_pool_set_config (GstBufferPool * bpool, GstStructure * config)
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{
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GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
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const GstCaps *caps;
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guint size, min_buffers, max_buffers;
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guint prefix, align;
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GST_DEBUG_OBJECT (pool, "set config");
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/* parse the config and keep around */
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if (!gst_buffer_pool_config_get (config, &caps, &size, &min_buffers,
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&max_buffers, &prefix, &align))
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goto wrong_config;
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GST_DEBUG_OBJECT (pool, "config %" GST_PTR_FORMAT, config);
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pool->min_buffers = min_buffers;
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pool->max_buffers = max_buffers;
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return TRUE;
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wrong_config:
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{
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GST_WARNING_OBJECT (pool, "invalid config %" GST_PTR_FORMAT, config);
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return FALSE;
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}
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}
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static gboolean
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gst_v4l2_buffer_pool_start (GstBufferPool * bpool)
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{
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GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
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GstV4l2Object *obj = pool->obj;
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gint n;
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struct v4l2_requestbuffers breq;
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gint num_buffers;
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num_buffers = pool->max_buffers;
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/* first, lets request buffers, and see how many we can get: */
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GST_DEBUG_OBJECT (pool, "starting, requesting %d MMAP buffers", num_buffers);
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memset (&breq, 0, sizeof (struct v4l2_requestbuffers));
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breq.type = obj->type;
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breq.count = num_buffers;
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breq.memory = V4L2_MEMORY_MMAP;
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if (v4l2_ioctl (pool->video_fd, VIDIOC_REQBUFS, &breq) < 0)
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goto reqbufs_failed;
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GST_LOG_OBJECT (pool, " count: %u", breq.count);
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GST_LOG_OBJECT (pool, " type: %d", breq.type);
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GST_LOG_OBJECT (pool, " memory: %d", breq.memory);
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if (breq.count < GST_V4L2_MIN_BUFFERS)
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goto no_buffers;
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if (num_buffers != breq.count) {
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GST_WARNING_OBJECT (pool, "using %u buffers instead", breq.count);
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num_buffers = breq.count;
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}
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pool->obj = obj;
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pool->requeuebuf = (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ? TRUE : FALSE);
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pool->buffer_count = num_buffers;
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pool->buffers = g_new0 (GstBuffer *, num_buffers);
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pool->index = 0;
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/* now, map the buffers: */
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for (n = 0; n < num_buffers; n++) {
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GstBuffer *buffer;
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if (gst_v4l2_buffer_pool_alloc_buffer (bpool, &buffer, NULL) != GST_FLOW_OK)
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goto buffer_new_failed;
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if (pool->requeuebuf)
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gst_v4l2_buffer_pool_qbuf (bpool, buffer);
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}
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return TRUE;
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/* ERRORS */
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reqbufs_failed:
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{
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GST_ELEMENT_ERROR (pool, RESOURCE, READ,
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(_("Could not get buffers from device '%s'."),
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obj->videodev),
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("error requesting %d buffers: %s", num_buffers, g_strerror (errno)));
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return FALSE;
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}
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no_buffers:
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{
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GST_ELEMENT_ERROR (pool, RESOURCE, READ,
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(_("Could not get enough buffers from device '%s'."),
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obj->videodev),
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("we received %d from device '%s', we want at least %d",
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breq.count, obj->videodev, GST_V4L2_MIN_BUFFERS));
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return FALSE;
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}
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buffer_new_failed:
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{
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return FALSE;
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}
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}
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static gboolean
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gst_v4l2_buffer_pool_stop (GstBufferPool * bpool)
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{
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GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
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guint n;
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GST_DEBUG_OBJECT (pool, "stopping pool");
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/* free the buffers: */
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for (n = 0; n < pool->buffer_count; n++)
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gst_v4l2_buffer_pool_free_buffer (bpool, pool->buffers[n]);
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return TRUE;
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}
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static GstFlowReturn
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gst_v4l2_buffer_pool_acquire_buffer (GstBufferPool * bpool, GstBuffer ** buffer,
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GstBufferPoolParams * params)
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{
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GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
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GstBuffer *outbuf;
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struct v4l2_buffer vbuffer;
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GstV4l2Object *obj = pool->obj;
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if (GST_BUFFER_POOL_IS_FLUSHING (bpool))
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goto flushing;
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memset (&vbuffer, 0x00, sizeof (vbuffer));
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vbuffer.type = obj->type;
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vbuffer.memory = V4L2_MEMORY_MMAP;
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if (v4l2_ioctl (pool->video_fd, VIDIOC_DQBUF, &vbuffer) < 0)
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goto error;
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/* get our GstBuffer with that index from the pool, if the buffer was
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* outstanding we have a serious problem.
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*/
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outbuf = pool->buffers[vbuffer.index];
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if (outbuf == NULL)
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goto no_buffers;
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/* mark the buffer outstanding */
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pool->buffers[vbuffer.index] = NULL;
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GST_LOG_OBJECT (pool,
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"dequeued frame %d (ix=%d), flags %08x, pool-ct=%d, buffer=%p",
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vbuffer.sequence, vbuffer.index, vbuffer.flags, pool->num_live_buffers,
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outbuf);
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pool->num_live_buffers++;
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GST_DEBUG_OBJECT (pool, "num_live_buffers++: %d", pool->num_live_buffers);
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/* set top/bottom field first if v4l2_buffer has the information */
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if (vbuffer.field == V4L2_FIELD_INTERLACED_TB)
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GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_TFF);
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if (vbuffer.field == V4L2_FIELD_INTERLACED_BT)
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GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_TFF);
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/* this can change at every frame, esp. with jpeg */
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gst_buffer_resize (outbuf, 0, vbuffer.bytesused);
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*buffer = outbuf;
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return GST_FLOW_OK;
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/* ERRORS */
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flushing:
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{
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return GST_FLOW_WRONG_STATE;
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}
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error:
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{
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GST_WARNING_OBJECT (pool,
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"problem grabbing frame %d (ix=%d), pool-ct=%d, buf.flags=%d",
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vbuffer.sequence, vbuffer.index,
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GST_MINI_OBJECT_REFCOUNT (pool), vbuffer.flags);
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switch (errno) {
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case EAGAIN:
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GST_WARNING_OBJECT (pool,
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"Non-blocking I/O has been selected using O_NONBLOCK and"
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" no buffer was in the outgoing queue. device %s", obj->videodev);
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break;
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case EINVAL:
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GST_ELEMENT_ERROR (pool, RESOURCE, FAILED,
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(_("Failed trying to get video frames from device '%s'."),
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obj->videodev),
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(_("The buffer type is not supported, or the index is out of bounds," " or no buffers have been allocated yet, or the userptr" " or length are invalid. device %s"), obj->videodev));
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break;
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case ENOMEM:
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GST_ELEMENT_ERROR (pool, RESOURCE, FAILED,
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(_("Failed trying to get video frames from device '%s'. Not enough memory."), obj->videodev), (_("insufficient memory to enqueue a user pointer buffer. device %s."), obj->videodev));
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break;
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case EIO:
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GST_INFO_OBJECT (pool,
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"VIDIOC_DQBUF failed due to an internal error."
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" Can also indicate temporary problems like signal loss."
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" Note the driver might dequeue an (empty) buffer despite"
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" returning an error, or even stop capturing."
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" device %s", obj->videodev);
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/* have we de-queued a buffer ? */
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if (!(vbuffer.flags & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))) {
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GST_DEBUG_OBJECT (pool, "reenqueing buffer");
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/* FIXME ... should we do something here? */
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}
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break;
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case EINTR:
|
||||
GST_WARNING_OBJECT (pool,
|
||||
"could not sync on a buffer on device %s", obj->videodev);
|
||||
break;
|
||||
default:
|
||||
GST_WARNING_OBJECT (pool,
|
||||
"Grabbing frame got interrupted on %s unexpectedly. %d: %s.",
|
||||
obj->videodev, errno, g_strerror (errno));
|
||||
break;
|
||||
}
|
||||
return GST_FLOW_ERROR;
|
||||
}
|
||||
no_buffers:
|
||||
{
|
||||
GST_ELEMENT_ERROR (pool, RESOURCE, FAILED,
|
||||
(_("Failed trying to get video frames from device '%s'."),
|
||||
obj->videodev),
|
||||
(_("No free buffers found in the pool at index %d."), vbuffer.index));
|
||||
return GST_FLOW_ERROR;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
gst_v4l2_buffer_pool_release_buffer (GstBufferPool * bpool, GstBuffer * buffer)
|
||||
{
|
||||
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
|
||||
|
||||
GST_DEBUG_OBJECT (pool, "release");
|
||||
|
||||
if (pool->requeuebuf)
|
||||
gst_v4l2_buffer_pool_qbuf (bpool, buffer);
|
||||
}
|
||||
|
||||
static void
|
||||
gst_v4l2_buffer_pool_finalize (GObject * object)
|
||||
{
|
||||
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (object);
|
||||
|
||||
g_mutex_free (pool->lock);
|
||||
pool->lock = NULL;
|
||||
|
||||
g_async_queue_unref (pool->avail_buffers);
|
||||
pool->avail_buffers = NULL;
|
||||
|
||||
if (pool->video_fd >= 0)
|
||||
v4l2_close (pool->video_fd);
|
||||
|
||||
|
|
@ -244,17 +455,23 @@ gst_v4l2_buffer_pool_finalize (GObject * object)
|
|||
static void
|
||||
gst_v4l2_buffer_pool_init (GstV4l2BufferPool * pool)
|
||||
{
|
||||
pool->lock = g_mutex_new ();
|
||||
pool->running = FALSE;
|
||||
pool->num_live_buffers = 0;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_v4l2_buffer_pool_class_init (GstV4l2BufferPoolClass * klass)
|
||||
{
|
||||
GObjectClass *object_class = G_OBJECT_CLASS (klass);
|
||||
GstBufferPoolClass *bufferpool_class = GST_BUFFER_POOL_CLASS (klass);
|
||||
|
||||
object_class->finalize = gst_v4l2_buffer_pool_finalize;
|
||||
|
||||
bufferpool_class->start = gst_v4l2_buffer_pool_start;
|
||||
bufferpool_class->stop = gst_v4l2_buffer_pool_stop;
|
||||
bufferpool_class->set_config = gst_v4l2_buffer_pool_set_config;
|
||||
bufferpool_class->alloc_buffer = gst_v4l2_buffer_pool_alloc_buffer;
|
||||
bufferpool_class->acquire_buffer = gst_v4l2_buffer_pool_acquire_buffer;
|
||||
bufferpool_class->release_buffer = gst_v4l2_buffer_pool_release_buffer;
|
||||
bufferpool_class->free_buffer = gst_v4l2_buffer_pool_free_buffer;
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -270,13 +487,10 @@ gst_v4l2_buffer_pool_class_init (GstV4l2BufferPoolClass * klass)
|
|||
*
|
||||
* Returns: the new pool, use gst_v4l2_buffer_pool_destroy() to free resources
|
||||
*/
|
||||
GstV4l2BufferPool *
|
||||
gst_v4l2_buffer_pool_new (GstV4l2Object * obj, gint num_buffers,
|
||||
gboolean requeuebuf)
|
||||
GstBufferPool *
|
||||
gst_v4l2_buffer_pool_new (GstV4l2Object * obj)
|
||||
{
|
||||
GstV4l2BufferPool *pool;
|
||||
gint n;
|
||||
struct v4l2_requestbuffers breq;
|
||||
|
||||
pool = (GstV4l2BufferPool *) g_object_new (GST_TYPE_V4L2_BUFFER_POOL, NULL);
|
||||
|
||||
|
|
@ -284,161 +498,20 @@ gst_v4l2_buffer_pool_new (GstV4l2Object * obj, gint num_buffers,
|
|||
if (pool->video_fd < 0)
|
||||
goto dup_failed;
|
||||
|
||||
/* first, lets request buffers, and see how many we can get: */
|
||||
GST_DEBUG_OBJECT (obj->element, "STREAMING, 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 (obj->element, " count: %u", breq.count);
|
||||
GST_LOG_OBJECT (obj->element, " type: %d", breq.type);
|
||||
GST_LOG_OBJECT (obj->element, " memory: %d", breq.memory);
|
||||
|
||||
if (breq.count < GST_V4L2_MIN_BUFFERS)
|
||||
goto no_buffers;
|
||||
|
||||
if (num_buffers != breq.count) {
|
||||
GST_WARNING_OBJECT (obj->element, "using %u buffers instead", breq.count);
|
||||
num_buffers = breq.count;
|
||||
}
|
||||
|
||||
pool->obj = obj;
|
||||
pool->requeuebuf = requeuebuf;
|
||||
pool->type = obj->type;
|
||||
pool->buffer_count = num_buffers;
|
||||
pool->buffers = g_new0 (GstBuffer *, num_buffers);
|
||||
pool->avail_buffers = g_async_queue_new ();
|
||||
|
||||
/* now, map the buffers: */
|
||||
for (n = 0; n < num_buffers; n++) {
|
||||
pool->buffers[n] = gst_v4l2_buffer_new (pool, n);
|
||||
if (!pool->buffers[n])
|
||||
goto buffer_new_failed;
|
||||
pool->num_live_buffers++;
|
||||
g_async_queue_push (pool->avail_buffers, pool->buffers[n]);
|
||||
}
|
||||
|
||||
return pool;
|
||||
return GST_BUFFER_POOL_CAST (pool);
|
||||
|
||||
/* ERRORS */
|
||||
dup_failed:
|
||||
{
|
||||
gint errnosave = errno;
|
||||
|
||||
g_object_unref (pool);
|
||||
|
||||
gst_object_unref (pool);
|
||||
errno = errnosave;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
reqbufs_failed:
|
||||
{
|
||||
GST_ELEMENT_ERROR (obj->element, RESOURCE, READ,
|
||||
(_("Could not get buffers from device '%s'."),
|
||||
obj->videodev),
|
||||
("error requesting %d buffers: %s", num_buffers, g_strerror (errno)));
|
||||
return NULL;
|
||||
}
|
||||
no_buffers:
|
||||
{
|
||||
GST_ELEMENT_ERROR (obj->element, RESOURCE, READ,
|
||||
(_("Could not get enough buffers from device '%s'."),
|
||||
obj->videodev),
|
||||
("we received %d from device '%s', we want at least %d",
|
||||
breq.count, obj->videodev, GST_V4L2_MIN_BUFFERS));
|
||||
return NULL;
|
||||
}
|
||||
buffer_new_failed:
|
||||
{
|
||||
gint errnosave = errno;
|
||||
|
||||
gst_v4l2_buffer_pool_destroy (pool);
|
||||
|
||||
errno = errnosave;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_v4l2_buffer_pool_destroy:
|
||||
* @pool: the pool
|
||||
*
|
||||
* Free all resources in the pool and the pool itself.
|
||||
*/
|
||||
void
|
||||
gst_v4l2_buffer_pool_destroy (GstV4l2BufferPool * pool)
|
||||
{
|
||||
gint n;
|
||||
GstV4l2Object *obj = pool->obj;
|
||||
|
||||
GST_V4L2_BUFFER_POOL_LOCK (pool);
|
||||
pool->running = FALSE;
|
||||
GST_V4L2_BUFFER_POOL_UNLOCK (pool);
|
||||
|
||||
GST_DEBUG_OBJECT (obj->element, "destroy pool");
|
||||
|
||||
/* after this point, no more buffers will be queued or dequeued; no buffer
|
||||
* from pool->buffers that is NULL will be set to a buffer, and no buffer that
|
||||
* is not NULL will be pushed out. */
|
||||
|
||||
/* miniobjects have no dispose, so they can't break ref-cycles, as buffers ref
|
||||
* the pool, we need to unref the buffer to properly finalize te pool */
|
||||
for (n = 0; n < pool->buffer_count; n++) {
|
||||
GstBuffer *buf;
|
||||
|
||||
GST_V4L2_BUFFER_POOL_LOCK (pool);
|
||||
buf = pool->buffers[n];
|
||||
GST_V4L2_BUFFER_POOL_UNLOCK (pool);
|
||||
|
||||
if (buf)
|
||||
/* we own the ref if the buffer is in pool->buffers; drop it. */
|
||||
gst_buffer_unref (buf);
|
||||
}
|
||||
|
||||
g_object_unref (pool);
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_v4l2_buffer_pool_get:
|
||||
* @pool: the "this" object
|
||||
* @blocking: should this call suspend until there is a buffer available
|
||||
* in the buffer pool?
|
||||
*
|
||||
* Get an available buffer in the pool
|
||||
*/
|
||||
GstBuffer *
|
||||
gst_v4l2_buffer_pool_get (GstV4l2BufferPool * pool, gboolean blocking)
|
||||
{
|
||||
GstBuffer *buf;
|
||||
|
||||
if (blocking) {
|
||||
buf = g_async_queue_pop (pool->avail_buffers);
|
||||
} else {
|
||||
buf = g_async_queue_try_pop (pool->avail_buffers);
|
||||
}
|
||||
|
||||
if (buf) {
|
||||
GstMetaV4l2 *meta = GST_META_V4L2_GET (buf);
|
||||
|
||||
GST_V4L2_BUFFER_POOL_LOCK (pool);
|
||||
gst_buffer_resize (buf, 0, meta->vbuffer.length);
|
||||
GST_BUFFER_FLAG_UNSET (buf, 0xffffffff);
|
||||
GST_V4L2_BUFFER_POOL_UNLOCK (pool);
|
||||
}
|
||||
|
||||
pool->running = TRUE;
|
||||
|
||||
return buf;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* gst_v4l2_buffer_pool_qbuf:
|
||||
* @pool: the pool
|
||||
|
|
@ -449,145 +522,42 @@ gst_v4l2_buffer_pool_get (GstV4l2BufferPool * pool, gboolean blocking)
|
|||
* Returns: %TRUE for success
|
||||
*/
|
||||
gboolean
|
||||
gst_v4l2_buffer_pool_qbuf (GstV4l2BufferPool * pool, GstBuffer * buf)
|
||||
gst_v4l2_buffer_pool_qbuf (GstBufferPool * bpool, GstBuffer * buf)
|
||||
{
|
||||
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
|
||||
GstMetaV4l2 *meta;
|
||||
GstV4l2Object *obj = pool->obj;
|
||||
gint index;
|
||||
|
||||
meta = GST_META_V4L2_GET (buf);
|
||||
g_assert (meta != NULL);
|
||||
|
||||
GST_LOG_OBJECT (obj->element, "enqueue pool buffer %d", meta->vbuffer.index);
|
||||
index = meta->vbuffer.index;
|
||||
|
||||
GST_LOG_OBJECT (pool, "enqueue pool buffer %d", index);
|
||||
|
||||
if (pool->buffers[index] != NULL)
|
||||
goto already_queued;
|
||||
|
||||
if (v4l2_ioctl (pool->video_fd, VIDIOC_QBUF, &meta->vbuffer) < 0)
|
||||
goto queue_failed;
|
||||
|
||||
pool->buffers[index] = buf;
|
||||
|
||||
pool->num_live_buffers--;
|
||||
GST_DEBUG_OBJECT (obj->element, "num_live_buffers--: %d",
|
||||
pool->num_live_buffers);
|
||||
GST_DEBUG_OBJECT (pool, "num_live_buffers--: %d", pool->num_live_buffers);
|
||||
|
||||
return TRUE;
|
||||
|
||||
/* ERRORS */
|
||||
queue_failed:
|
||||
already_queued:
|
||||
{
|
||||
GST_WARNING_OBJECT (obj->element, "could not queue a buffer");
|
||||
GST_WARNING_OBJECT (pool, "the buffer was already queued");
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_v4l2_buffer_pool_dqbuf:
|
||||
* @pool: the pool
|
||||
*
|
||||
* Dequeue a buffer from the driver. Some generic error handling is done in
|
||||
* this function, but any error handling specific to v4l2src (capture) or
|
||||
* v4l2sink (output) can be done outside this function by checking 'errno'
|
||||
*
|
||||
* Returns: a buffer
|
||||
*/
|
||||
GstBuffer *
|
||||
gst_v4l2_buffer_pool_dqbuf (GstV4l2BufferPool * pool)
|
||||
{
|
||||
GstBuffer *pool_buffer;
|
||||
struct v4l2_buffer buffer;
|
||||
GstV4l2Object *obj = pool->obj;
|
||||
|
||||
memset (&buffer, 0x00, sizeof (buffer));
|
||||
buffer.type = pool->type;
|
||||
buffer.memory = V4L2_MEMORY_MMAP;
|
||||
|
||||
if (v4l2_ioctl (pool->video_fd, VIDIOC_DQBUF, &buffer) < 0)
|
||||
goto error;
|
||||
|
||||
GST_V4L2_BUFFER_POOL_LOCK (pool);
|
||||
|
||||
/* get our GstBuffer with that index from the pool, if the buffer was
|
||||
* outstanding we have a serious problem.
|
||||
*/
|
||||
pool_buffer = pool->buffers[buffer.index];
|
||||
|
||||
if (pool_buffer == NULL)
|
||||
goto no_buffers;
|
||||
|
||||
GST_LOG_OBJECT (obj->element,
|
||||
"grabbed frame %d (ix=%d), flags %08x, pool-ct=%d, buffer=%p",
|
||||
buffer.sequence, buffer.index, buffer.flags, pool->num_live_buffers,
|
||||
pool_buffer);
|
||||
|
||||
pool->num_live_buffers++;
|
||||
GST_DEBUG_OBJECT (obj->element, "num_live_buffers++: %d",
|
||||
pool->num_live_buffers);
|
||||
|
||||
/* set top/bottom field first if v4l2_buffer has the information */
|
||||
if (buffer.field == V4L2_FIELD_INTERLACED_TB)
|
||||
GST_BUFFER_FLAG_SET (pool_buffer, GST_VIDEO_BUFFER_TFF);
|
||||
if (buffer.field == V4L2_FIELD_INTERLACED_BT)
|
||||
GST_BUFFER_FLAG_UNSET (pool_buffer, GST_VIDEO_BUFFER_TFF);
|
||||
|
||||
/* this can change at every frame, esp. with jpeg */
|
||||
gst_buffer_resize (pool_buffer, 0, buffer.bytesused);
|
||||
|
||||
GST_V4L2_BUFFER_POOL_UNLOCK (pool);
|
||||
|
||||
return pool_buffer;
|
||||
|
||||
/* ERRORS */
|
||||
error:
|
||||
queue_failed:
|
||||
{
|
||||
GST_WARNING_OBJECT (obj->element,
|
||||
"problem grabbing frame %d (ix=%d), pool-ct=%d, buf.flags=%d",
|
||||
buffer.sequence, buffer.index,
|
||||
GST_MINI_OBJECT_REFCOUNT (pool), buffer.flags);
|
||||
|
||||
switch (errno) {
|
||||
case EAGAIN:
|
||||
GST_WARNING_OBJECT (obj->element,
|
||||
"Non-blocking I/O has been selected using O_NONBLOCK and"
|
||||
" no buffer was in the outgoing queue. device %s", obj->videodev);
|
||||
break;
|
||||
case EINVAL:
|
||||
GST_ELEMENT_ERROR (obj->element, RESOURCE, FAILED,
|
||||
(_("Failed trying to get video frames from device '%s'."),
|
||||
obj->videodev),
|
||||
(_("The buffer type is not supported, or the index is out of bounds," " or no buffers have been allocated yet, or the userptr" " or length are invalid. device %s"), obj->videodev));
|
||||
break;
|
||||
case ENOMEM:
|
||||
GST_ELEMENT_ERROR (obj->element, RESOURCE, FAILED,
|
||||
(_("Failed trying to get video frames from device '%s'. Not enough memory."), obj->videodev), (_("insufficient memory to enqueue a user pointer buffer. device %s."), obj->videodev));
|
||||
break;
|
||||
case EIO:
|
||||
GST_INFO_OBJECT (obj->element,
|
||||
"VIDIOC_DQBUF failed due to an internal error."
|
||||
" Can also indicate temporary problems like signal loss."
|
||||
" Note the driver might dequeue an (empty) buffer despite"
|
||||
" returning an error, or even stop capturing."
|
||||
" device %s", obj->videodev);
|
||||
/* have we de-queued a buffer ? */
|
||||
if (!(buffer.flags & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))) {
|
||||
GST_DEBUG_OBJECT (obj->element, "reenqueing buffer");
|
||||
/* FIXME ... should we do something here? */
|
||||
}
|
||||
break;
|
||||
case EINTR:
|
||||
GST_WARNING_OBJECT (obj->element,
|
||||
"could not sync on a buffer on device %s", obj->videodev);
|
||||
break;
|
||||
default:
|
||||
GST_WARNING_OBJECT (obj->element,
|
||||
"Grabbing frame got interrupted on %s unexpectedly. %d: %s.",
|
||||
obj->videodev, errno, g_strerror (errno));
|
||||
break;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
no_buffers:
|
||||
{
|
||||
GST_ELEMENT_ERROR (obj->element, RESOURCE, FAILED,
|
||||
(_("Failed trying to get video frames from device '%s'."),
|
||||
obj->videodev),
|
||||
(_("No free buffers found in the pool at index %d."), buffer.index));
|
||||
GST_V4L2_BUFFER_POOL_UNLOCK (pool);
|
||||
return NULL;
|
||||
GST_WARNING_OBJECT (pool, "could not queue a buffer");
|
||||
return FALSE;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -601,7 +571,9 @@ no_buffers:
|
|||
* Returns: the number of buffers available.
|
||||
*/
|
||||
gint
|
||||
gst_v4l2_buffer_pool_available_buffers (GstV4l2BufferPool * pool)
|
||||
gst_v4l2_buffer_pool_available_buffers (GstBufferPool * bpool)
|
||||
{
|
||||
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
|
||||
|
||||
return pool->buffer_count - pool->num_live_buffers;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -39,34 +39,31 @@ GST_DEBUG_CATEGORY_EXTERN (v4l2buffer_debug);
|
|||
G_BEGIN_DECLS
|
||||
|
||||
|
||||
GType gst_v4l2_buffer_pool_get_type (void);
|
||||
#define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type())
|
||||
#define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL))
|
||||
#define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool))
|
||||
|
||||
#define GST_V4L2_BUFFER_POOL_LOCK(pool) g_mutex_lock ((pool)->lock)
|
||||
#define GST_V4L2_BUFFER_POOL_UNLOCK(pool) g_mutex_unlock ((pool)->lock)
|
||||
|
||||
struct _GstV4l2BufferPool
|
||||
{
|
||||
GObject parent;
|
||||
GstBufferPool parent;
|
||||
|
||||
GstV4l2Object *obj; /* the v4l2 object */
|
||||
gboolean requeuebuf; /* if true, unusued buffers are automatically re-QBUF'd */
|
||||
enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_BUF_TYPE_VIDEO_OUTPUT */
|
||||
|
||||
GMutex *lock;
|
||||
gboolean running; /* with lock */
|
||||
gint num_live_buffers; /* number of buffers not with driver */
|
||||
GAsyncQueue* avail_buffers;/* pool of available buffers, not with the driver and which aren't held outside the bufferpool */
|
||||
gint video_fd; /* a dup(2) of the v4l2object's video_fd */
|
||||
gboolean requeuebuf; /* if true, unusued buffers are automatically re-QBUF'd */
|
||||
|
||||
guint min_buffers;
|
||||
guint max_buffers;
|
||||
|
||||
guint buffer_count;
|
||||
gint index;
|
||||
gint num_live_buffers; /* number of buffers not with driver */
|
||||
|
||||
GstBuffer **buffers;
|
||||
};
|
||||
|
||||
struct _GstV4l2BufferPoolClass
|
||||
{
|
||||
GObjectClass parent_class;
|
||||
GstBufferPoolClass parent_class;
|
||||
};
|
||||
|
||||
struct _GstMetaV4l2 {
|
||||
|
|
@ -74,24 +71,19 @@ struct _GstMetaV4l2 {
|
|||
|
||||
gpointer mem;
|
||||
struct v4l2_buffer vbuffer;
|
||||
|
||||
GstV4l2BufferPool *pool;
|
||||
};
|
||||
|
||||
const GstMetaInfo * gst_meta_v4l2_get_info (void);
|
||||
#define GST_META_V4L2_GET(buf) ((GstMetaV4l2 *)gst_buffer_get_meta(buf,gst_meta_v4l2_get_info()))
|
||||
#define GST_META_V4L2_ADD(buf) ((GstMetaV4l2 *)gst_buffer_add_meta(buf,gst_meta_v4l2_get_info(),NULL))
|
||||
|
||||
GstV4l2BufferPool * gst_v4l2_buffer_pool_new (GstV4l2Object *obj, gint num_buffers, gboolean requeuebuf);
|
||||
void gst_v4l2_buffer_pool_destroy (GstV4l2BufferPool * pool);
|
||||
GType gst_v4l2_buffer_pool_get_type (void);
|
||||
|
||||
GstBuffer * gst_v4l2_buffer_pool_get (GstV4l2BufferPool *pool, gboolean blocking);
|
||||
GstBufferPool * gst_v4l2_buffer_pool_new (GstV4l2Object *obj);
|
||||
|
||||
gboolean gst_v4l2_buffer_pool_qbuf (GstBufferPool * bpool, GstBuffer * buf);
|
||||
|
||||
gboolean gst_v4l2_buffer_pool_qbuf (GstV4l2BufferPool *pool, GstBuffer *buf);
|
||||
GstBuffer * gst_v4l2_buffer_pool_dqbuf (GstV4l2BufferPool *pool);
|
||||
|
||||
gint gst_v4l2_buffer_pool_available_buffers (GstV4l2BufferPool *pool);
|
||||
gint gst_v4l2_buffer_pool_available_buffers (GstBufferPool *pool);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
|
|
|
|||
|
|
@ -2050,24 +2050,27 @@ gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object)
|
|||
GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
|
||||
|
||||
if (v4l2object->vcap.capabilities & V4L2_CAP_STREAMING) {
|
||||
gboolean requeuebuf;
|
||||
guint num_buffers;
|
||||
GstStructure *config;
|
||||
|
||||
requeuebuf = v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
||||
/* keep track of current number of buffers */
|
||||
num_buffers = v4l2object->num_buffers;
|
||||
|
||||
/* Map the buffers */
|
||||
GST_LOG_OBJECT (v4l2object->element, "initiating buffer pool");
|
||||
|
||||
if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object,
|
||||
v4l2object->num_buffers, requeuebuf)))
|
||||
if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object)))
|
||||
goto buffer_pool_new_failed;
|
||||
|
||||
GST_INFO_OBJECT (v4l2object->element, "capturing buffers via mmap()");
|
||||
v4l2object->use_mmap = TRUE;
|
||||
|
||||
if (v4l2object->num_buffers != v4l2object->pool->buffer_count) {
|
||||
v4l2object->num_buffers = v4l2object->pool->buffer_count;
|
||||
g_object_notify (G_OBJECT (v4l2object->element), "queue-size");
|
||||
}
|
||||
config = gst_buffer_pool_get_config (v4l2object->pool);
|
||||
gst_buffer_pool_config_set (config, NULL, 0, num_buffers, num_buffers,
|
||||
0, 0);
|
||||
gst_buffer_pool_set_config (v4l2object->pool, config);
|
||||
|
||||
gst_buffer_pool_set_active (v4l2object->pool, TRUE);
|
||||
|
||||
} else if (v4l2object->vcap.capabilities & V4L2_CAP_READWRITE) {
|
||||
GST_INFO_OBJECT (v4l2object->element, "capturing buffers via read()");
|
||||
|
|
@ -2335,22 +2338,18 @@ pool_failed:
|
|||
gboolean
|
||||
gst_v4l2_object_start (GstV4l2Object * v4l2object)
|
||||
{
|
||||
GstBuffer *buf;
|
||||
|
||||
GST_DEBUG_OBJECT (v4l2object->element, "starting");
|
||||
|
||||
GST_V4L2_CHECK_OPEN (v4l2object);
|
||||
GST_V4L2_CHECK_ACTIVE (v4l2object);
|
||||
|
||||
if (v4l2object->pool)
|
||||
if (!gst_buffer_pool_set_active (v4l2object->pool, TRUE))
|
||||
goto activate_failed;
|
||||
|
||||
if (v4l2object->use_mmap) {
|
||||
switch (v4l2object->type) {
|
||||
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
|
||||
/* for capture, queue all the buffers so the device can start filling
|
||||
* them */
|
||||
GST_DEBUG_OBJECT (v4l2object->element, "queueing buffers");
|
||||
while ((buf = gst_v4l2_buffer_pool_get (v4l2object->pool, FALSE)))
|
||||
if (!gst_v4l2_buffer_pool_qbuf (v4l2object->pool, buf))
|
||||
goto queue_failed;
|
||||
break;
|
||||
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
|
||||
/* for output, we assume we already queued a buffer */
|
||||
|
|
@ -2369,14 +2368,10 @@ gst_v4l2_object_start (GstV4l2Object * v4l2object)
|
|||
return TRUE;
|
||||
|
||||
/* ERRORS */
|
||||
queue_failed:
|
||||
activate_failed:
|
||||
{
|
||||
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
|
||||
(_("Could not enqueue buffers in device '%s'."),
|
||||
v4l2object->videodev),
|
||||
("enqueing buffer %d/%d failed: %s",
|
||||
GST_META_V4L2_GET (buf)->vbuffer.index, v4l2object->num_buffers,
|
||||
g_strerror (errno)));
|
||||
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, OPEN_READ,
|
||||
(_("Error starting bufferpool")), (NULL));
|
||||
return FALSE;
|
||||
}
|
||||
start_failed:
|
||||
|
|
@ -2412,7 +2407,9 @@ gst_v4l2_object_stop (GstV4l2Object * v4l2object)
|
|||
}
|
||||
|
||||
if (v4l2object->pool) {
|
||||
gst_v4l2_buffer_pool_destroy (v4l2object->pool);
|
||||
GST_DEBUG_OBJECT (v4l2object->element, "deactivating pool");
|
||||
gst_buffer_pool_set_active (v4l2object->pool, FALSE);
|
||||
gst_object_unref (v4l2object->pool);
|
||||
v4l2object->pool = NULL;
|
||||
}
|
||||
|
||||
|
|
@ -2516,8 +2513,9 @@ cleanup:
|
|||
static GstFlowReturn
|
||||
gst_v4l2_object_get_mmap (GstV4l2Object * v4l2object, GstBuffer ** buf)
|
||||
{
|
||||
GstFlowReturn res;
|
||||
#define NUM_TRIALS 50
|
||||
GstV4l2BufferPool *pool;
|
||||
GstBufferPool *pool;
|
||||
gint32 trials = NUM_TRIALS;
|
||||
GstBuffer *pool_buffer;
|
||||
gboolean need_copy;
|
||||
|
|
@ -2546,8 +2544,8 @@ gst_v4l2_object_get_mmap (GstV4l2Object * v4l2object, GstBuffer ** buf)
|
|||
}
|
||||
}
|
||||
|
||||
pool_buffer = gst_v4l2_buffer_pool_dqbuf (pool);
|
||||
if (pool_buffer == NULL)
|
||||
res = gst_buffer_pool_acquire_buffer (pool, &pool_buffer, NULL);
|
||||
if (res != GST_FLOW_OK)
|
||||
goto no_buffer;
|
||||
|
||||
if (v4l2object->size > 0) {
|
||||
|
|
@ -2651,7 +2649,7 @@ gst_v4l2_object_get_buffer (GstV4l2Object * v4l2object, GstBuffer ** buf)
|
|||
}
|
||||
break;
|
||||
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
|
||||
ret = GST_FLOW_ERROR;
|
||||
ret = gst_buffer_pool_acquire_buffer (v4l2object->pool, buf, NULL);
|
||||
break;
|
||||
default:
|
||||
ret = GST_FLOW_ERROR;
|
||||
|
|
@ -2663,18 +2661,21 @@ gst_v4l2_object_get_buffer (GstV4l2Object * v4l2object, GstBuffer ** buf)
|
|||
GstFlowReturn
|
||||
gst_v4l2_object_output_buffer (GstV4l2Object * v4l2object, GstBuffer * buf)
|
||||
{
|
||||
GstFlowReturn ret;
|
||||
GstBuffer *newbuf = NULL;
|
||||
GstMetaV4l2 *meta;
|
||||
|
||||
meta = GST_META_V4L2_GET (buf);
|
||||
|
||||
if (meta == NULL || meta->pool != v4l2object->pool) {
|
||||
if (meta == NULL || buf->pool != v4l2object->pool) {
|
||||
guint8 *data;
|
||||
gsize size;
|
||||
|
||||
/* not our buffer */
|
||||
GST_DEBUG_OBJECT (v4l2object->element, "slow-path.. need to memcpy");
|
||||
newbuf = gst_v4l2_buffer_pool_get (v4l2object->pool, TRUE);
|
||||
ret = gst_buffer_pool_acquire_buffer (v4l2object->pool, &newbuf, NULL);
|
||||
if (ret != GST_FLOW_OK)
|
||||
goto acquire_failed;
|
||||
|
||||
if (v4l2object->info.finfo) {
|
||||
GstVideoFrame src_frame, dest_frame;
|
||||
|
|
@ -2710,6 +2711,7 @@ gst_v4l2_object_output_buffer (GstV4l2Object * v4l2object, GstBuffer * buf)
|
|||
if (!newbuf)
|
||||
gst_buffer_ref (buf);
|
||||
|
||||
#if 0
|
||||
/* if the driver has more than one buffer, ie. more than just the one we
|
||||
* just queued, then dequeue one immediately to make it available via
|
||||
* _buffer_alloc():
|
||||
|
|
@ -2727,9 +2729,15 @@ gst_v4l2_object_output_buffer (GstV4l2Object * v4l2object, GstBuffer * buf)
|
|||
gst_buffer_unref (v4l2buf);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
return GST_FLOW_OK;
|
||||
|
||||
/* ERRORS */
|
||||
acquire_failed:
|
||||
{
|
||||
GST_DEBUG_OBJECT (v4l2object->element, "could not get buffer from pool");
|
||||
return ret;
|
||||
}
|
||||
queue_failed:
|
||||
{
|
||||
GST_DEBUG_OBJECT (v4l2object->element, "failed to queue buffer");
|
||||
|
|
|
|||
|
|
@ -119,7 +119,7 @@ struct _GstV4l2Object {
|
|||
guint32 min_queued_bufs;
|
||||
gboolean always_copy;
|
||||
gboolean use_mmap;
|
||||
GstV4l2BufferPool *pool;
|
||||
GstBufferPool *pool;
|
||||
|
||||
/* the video device's capabilities */
|
||||
struct v4l2_capability vcap;
|
||||
|
|
|
|||
Loading…
Reference in a new issue