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libcamera: Implement proper dmabuf negotiation support

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According to https://docs.pipewire.org/page_dma_buf.html, i.e. announce
each format once with, once without `SPA_FORMAT_VIDEO_modifier`
property.

Note: currently libcamera always uses `DRM_FORMAT_MOD_LINEAR` (`== 0`),
so `pix.modifier()` returning `0` does not mean that no modifier is
supported.

This is needed for clients using the new DMABuf negotiation pattern,
such as gstpipewiresrc after 602aa7d5.
This commit is contained in:
Robert Mader 2023-01-08 17:46:30 +01:00
parent 1e6920c33b
commit 950b62a8d8
1 changed files with 52 additions and 42 deletions
Download patch file Download diff file Expand all files Collapse all files

94
spa/plugins/libcamera/libcamera-utils.cpp
View file

@ -326,50 +326,60 @@ next_fmt:
}
port->size_index++;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
spa_pod_builder_add(&b,
SPA_FORMAT_mediaType, SPA_POD_Id(info->media_type),
SPA_FORMAT_mediaSubtype, SPA_POD_Id(info->media_subtype),
0);
for (i = 0; i < 2; i++) {
if (i > 0)
result.index = result.next++;
if (info->media_subtype == SPA_MEDIA_SUBTYPE_raw) {
spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_format, 0);
spa_pod_builder_id(&b, info->format);
spa_pod_builder_init(&b, buffer, sizeof(buffer));
spa_pod_builder_push_object(&b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
spa_pod_builder_add(&b,
SPA_FORMAT_mediaType, SPA_POD_Id(info->media_type),
SPA_FORMAT_mediaSubtype, SPA_POD_Id(info->media_subtype),
0);
if (info->media_subtype == SPA_MEDIA_SUBTYPE_raw) {
spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_format, 0);
spa_pod_builder_id(&b, info->format);
}
if (i == 0) {
spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_modifier, SPA_POD_PROP_FLAG_MANDATORY);
spa_pod_builder_long(&b, info->pix.modifier());
}
spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_size, 0);
if (sizeRange.hStep != 0 && sizeRange.vStep != 0) {
spa_pod_builder_push_choice(&b, &f[1], SPA_CHOICE_Step, 0);
spa_pod_builder_frame(&b, &f[1]);
spa_pod_builder_rectangle(&b,
sizeRange.min.width,
sizeRange.min.height);
spa_pod_builder_rectangle(&b,
sizeRange.min.width,
sizeRange.min.height);
spa_pod_builder_rectangle(&b,
sizeRange.max.width,
sizeRange.max.height);
spa_pod_builder_rectangle(&b,
sizeRange.hStep,
sizeRange.vStep);
spa_pod_builder_pop(&b, &f[1]);
} else {
spa_pod_builder_rectangle(&b, frameSize.width, frameSize.height);
}
fmt = (struct spa_pod*) spa_pod_builder_pop(&b, &f[0]);
if (spa_pod_filter(&b, &result.param, fmt, filter) < 0) {
if (i == 0)
continue;
else
goto next;
}
spa_node_emit_result(&impl->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
}
if (info->pix.modifier()) {
spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_modifier, 0);
spa_pod_builder_long(&b, info->pix.modifier());
}
spa_pod_builder_prop(&b, SPA_FORMAT_VIDEO_size, 0);
if (sizeRange.hStep != 0 && sizeRange.vStep != 0) {
spa_pod_builder_push_choice(&b, &f[1], SPA_CHOICE_Step, 0);
spa_pod_builder_frame(&b, &f[1]);
spa_pod_builder_rectangle(&b,
sizeRange.min.width,
sizeRange.min.height);
spa_pod_builder_rectangle(&b,
sizeRange.min.width,
sizeRange.min.height);
spa_pod_builder_rectangle(&b,
sizeRange.max.width,
sizeRange.max.height);
spa_pod_builder_rectangle(&b,
sizeRange.hStep,
sizeRange.vStep);
spa_pod_builder_pop(&b, &f[1]);
} else {
spa_pod_builder_rectangle(&b, frameSize.width, frameSize.height);
}
fmt = (struct spa_pod*) spa_pod_builder_pop(&b, &f[0]);
if (spa_pod_filter(&b, &result.param, fmt, filter) < 0)
goto next;
spa_node_emit_result(&impl->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
if (++count != num)
goto next;