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v4l2: Move decide allocation into v4l2object
https://bugzilla.gnome.org/show_bug.cgi?id=720568
This commit is contained in:
Nicolas Dufresne
parent
34a8cb09c8
commit
3cf85c9083
3 changed files with 108 additions and 86 deletions
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@ -3139,3 +3139,104 @@ gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
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return ret;
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}
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gboolean
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gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
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{
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GstBufferPool *pool;
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guint size, min, max;
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gboolean update;
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GST_DEBUG_OBJECT (obj->element, "decide allocation");
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g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
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obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
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if (gst_query_get_n_allocation_pools (query) > 0) {
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gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
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update = TRUE;
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} else {
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pool = NULL;
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min = max = 0;
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size = 0;
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update = FALSE;
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}
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GST_DEBUG_OBJECT (obj->element, "allocation: size:%u min:%u max:%u pool:%"
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GST_PTR_FORMAT, size, min, max, pool);
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if (min != 0) {
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/* if there is a min-buffers suggestion, use it. We add 1 because we need 1
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* buffer extra to capture while the other two buffers are downstream */
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min += 1;
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} else {
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min = 2;
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}
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/* select a pool */
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switch (obj->mode) {
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case GST_V4L2_IO_RW:
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if (pool == NULL) {
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/* no downstream pool, use our own then */
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GST_DEBUG_OBJECT (obj->element,
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"read/write mode: no downstream pool, using our own");
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pool = GST_BUFFER_POOL_CAST (obj->pool);
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size = obj->sizeimage;
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} else {
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/* in READ/WRITE mode, prefer a downstream pool because our own pool
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* doesn't help much, we have to write to it as well */
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GST_DEBUG_OBJECT (obj->element,
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"read/write mode: using downstream pool");
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/* use the bigest size, when we use our own pool we can't really do any
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* other size than what the hardware gives us but for downstream pools
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* we can try */
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size = MAX (size, obj->sizeimage);
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}
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break;
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case GST_V4L2_IO_MMAP:
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case GST_V4L2_IO_USERPTR:
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case GST_V4L2_IO_DMABUF:
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/* in streaming mode, prefer our own pool */
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pool = GST_BUFFER_POOL_CAST (obj->pool);
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size = obj->sizeimage;
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GST_DEBUG_OBJECT (obj->element,
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"streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
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break;
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case GST_V4L2_IO_AUTO:
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default:
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GST_WARNING_OBJECT (obj->element, "unhandled mode");
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break;
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}
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if (pool) {
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GstStructure *config;
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GstCaps *caps;
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL);
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gst_buffer_pool_config_set_params (config, caps, size, min, max);
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/* if downstream supports video metadata, add this to the pool config */
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if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
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GST_DEBUG_OBJECT (pool, "activate Video Meta");
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gst_buffer_pool_config_add_option (config,
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GST_BUFFER_POOL_OPTION_VIDEO_META);
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}
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gst_buffer_pool_set_config (pool, config);
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}
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if (update)
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gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
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else
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gst_query_add_allocation_pool (query, pool, size, min, max);
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return TRUE;
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pool_failed:
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{
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GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
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(_("Video device could not create buffer pool.")), GST_ERROR_SYSTEM);
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return FALSE;
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}
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}
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@ -278,6 +278,8 @@ gboolean gst_v4l2_object_setup_format (GstV4l2Object * v4l2object,
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GstVideoInfo * info,
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GstVideoAlignment * align);
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gboolean gst_v4l2_object_decide_allocation (GstV4l2Object * v4l2object,
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GstQuery * query);
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#define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \
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@ -464,94 +464,13 @@ gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
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static gboolean
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gst_v4l2src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query)
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{
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GstV4l2Src *src;
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GstV4l2Object *obj;
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GstBufferPool *pool;
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guint size, min, max;
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gboolean update;
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GstV4l2Src *src = GST_V4L2SRC (bsrc);
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gboolean ret = FALSE;
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src = GST_V4L2SRC (bsrc);
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obj = src->v4l2object;
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if (gst_v4l2_object_decide_allocation (src->v4l2object, query))
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ret = GST_BASE_SRC_CLASS (parent_class)->decide_allocation (bsrc, query);
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if (gst_query_get_n_allocation_pools (query) > 0) {
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gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
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update = TRUE;
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} else {
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pool = NULL;
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min = max = 0;
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size = 0;
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update = FALSE;
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}
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GST_DEBUG_OBJECT (src, "allocation: size:%u min:%u max:%u pool:%"
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GST_PTR_FORMAT, size, min, max, pool);
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if (min != 0) {
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/* if there is a min-buffers suggestion, use it. We add 1 because we need 1
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* buffer extra to capture while the other two buffers are downstream */
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min += 1;
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} else {
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min = 2;
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}
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/* select a pool */
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switch (obj->mode) {
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case GST_V4L2_IO_RW:
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if (pool == NULL) {
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/* no downstream pool, use our own then */
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GST_DEBUG_OBJECT (src,
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"read/write mode: no downstream pool, using our own");
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pool = GST_BUFFER_POOL_CAST (obj->pool);
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size = obj->sizeimage;
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} else {
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/* in READ/WRITE mode, prefer a downstream pool because our own pool
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* doesn't help much, we have to write to it as well */
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GST_DEBUG_OBJECT (src, "read/write mode: using downstream pool");
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/* use the bigest size, when we use our own pool we can't really do any
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* other size than what the hardware gives us but for downstream pools
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* we can try */
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size = MAX (size, obj->sizeimage);
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}
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break;
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case GST_V4L2_IO_MMAP:
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case GST_V4L2_IO_USERPTR:
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case GST_V4L2_IO_DMABUF:
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/* in streaming mode, prefer our own pool */
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pool = GST_BUFFER_POOL_CAST (obj->pool);
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size = obj->sizeimage;
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GST_DEBUG_OBJECT (src,
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"streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
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break;
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case GST_V4L2_IO_AUTO:
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default:
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GST_WARNING_OBJECT (src, "unhandled mode");
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break;
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}
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if (pool) {
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GstStructure *config;
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GstCaps *caps;
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL);
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gst_buffer_pool_config_set_params (config, caps, size, min, max);
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/* if downstream supports video metadata, add this to the pool config */
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if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
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GST_DEBUG_OBJECT (pool, "activate Video Meta");
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gst_buffer_pool_config_add_option (config,
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GST_BUFFER_POOL_OPTION_VIDEO_META);
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}
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gst_buffer_pool_set_config (pool, config);
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}
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if (update)
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gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
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else
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gst_query_add_allocation_pool (query, pool, size, min, max);
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return GST_BASE_SRC_CLASS (parent_class)->decide_allocation (bsrc, query);
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return ret;
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}
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static gboolean
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