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gstreamer-encoder: Add an encoder function that takes dmabuf fd as input

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This patch adds a new function to enable the creation of Gst memory with
the dmabuf fd as the source by using a dmabuf allocator. And, it also
adds a mechanism to register and invoke any callbacks once the Gst memory
object is no longer used by the pipeline.

This patch also ensures that the source_fps value is always non-zero.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc: Dongwon Kim <dongwon.kim@intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
This commit is contained in:
Vivek Kasireddy 2023-03-15 14:10:47 -07:00
parent e676750fa9
commit 5290ccd47f
2 changed files with 118 additions and 3 deletions
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2
meson.build
View File

@ -131,7 +131,7 @@ endforeach
spice_server_has_gstreamer = false
spice_server_gst_version = get_option('gstreamer')
if spice_server_gst_version != 'no'
gst_deps = ['gstreamer', 'gstreamer-base', 'gstreamer-app', 'gstreamer-video']
gst_deps = ['gstreamer', 'gstreamer-base', 'gstreamer-app', 'gstreamer-video', 'gstreamer-allocators']
foreach dep : gst_deps
dep = '@0@-@1@'.format(dep, spice_server_gst_version)
spice_server_deps += dependency(dep)

119
server/gstreamer-encoder.c
View File

@ -22,6 +22,7 @@
#include <pthread.h>
#include <gst/gst.h>
#include <gst/allocators/gstdmabuf.h>
#include <gst/app/gstappsrc.h>
#include <gst/app/gstappsink.h>
#include <gst/video/video.h>
@ -298,6 +299,7 @@ typedef struct SpiceGstEncoder {
/* How many frames were dropped by the server since the last encoded frame. */
uint32_t server_drops;
GstAllocator *allocator;
} SpiceGstEncoder;
@ -335,8 +337,12 @@ static inline double get_mbps(uint64_t bit_rate)
*/
static uint32_t get_source_fps(const SpiceGstEncoder *encoder)
{
return encoder->cbs.get_source_fps ?
encoder->cbs.get_source_fps(encoder->cbs.opaque) : SPICE_GST_DEFAULT_FPS;
uint32_t source_fps = 0;
if (encoder->cbs.get_source_fps) {
source_fps = encoder->cbs.get_source_fps(encoder->cbs.opaque);
}
return source_fps ? source_fps : SPICE_GST_DEFAULT_FPS;
}
static uint32_t get_network_latency(const SpiceGstEncoder *encoder)
@ -1456,6 +1462,7 @@ static void spice_gst_encoder_destroy(VideoEncoder *video_encoder)
{
SpiceGstEncoder *encoder = (SpiceGstEncoder*)video_encoder;
gst_object_unref(encoder->allocator);
free_pipeline(encoder);
pthread_mutex_destroy(&encoder->outbuf_mutex);
pthread_cond_destroy(&encoder->outbuf_cond);
@ -1568,6 +1575,112 @@ spice_gst_encoder_encode_frame(VideoEncoder *video_encoder,
return rc;
}
static void
spice_gst_mem_free_cb(VideoEncoderDmabufData *dmabuf_data, GstMiniObject *obj)
{
if (dmabuf_data->notify_mem_free) {
dmabuf_data->notify_mem_free(dmabuf_data->opaque);
g_free(dmabuf_data);
}
}
static VideoEncodeResults
spice_gst_encoder_encode_dmabuf(VideoEncoder *video_encoder,
uint32_t frame_mm_time,
VideoEncoderDmabufData *dmabuf_data,
VideoBuffer **outbuf)
{
SpiceGstEncoder *encoder = (SpiceGstEncoder*)video_encoder;
g_return_val_if_fail(outbuf != NULL, VIDEO_ENCODER_FRAME_UNSUPPORTED);
g_return_val_if_fail(dmabuf_data != NULL, VIDEO_ENCODER_FRAME_UNSUPPORTED);
VideoEncodeResults rc = VIDEO_ENCODER_FRAME_UNSUPPORTED;
*outbuf = NULL;
if (dmabuf_data->width != encoder->width ||
dmabuf_data->height != encoder->height) {
encoder->format = map_format(SPICE_BITMAP_FMT_32BIT);
encoder->width = dmabuf_data->width;
encoder->height = dmabuf_data->height;
if (encoder->bit_rate == 0) {
encoder->history[0].mm_time = frame_mm_time;
encoder->max_bit_rate = get_bit_rate_cap(encoder);
encoder->min_bit_rate = SPICE_GST_MIN_BITRATE;
encoder->status = SPICE_GST_BITRATE_DECREASING;
set_bit_rate(encoder, encoder->starting_bit_rate);
encoder->vbuffer_free = 0;
} else if (encoder->pipeline) {
set_pipeline_changes(encoder, SPICE_GST_VIDEO_PIPELINE_CAPS);
}
encoder->errors = 0;
} else if (encoder->errors >= 3) {
if (encoder->errors == 3) {
spice_debug("%s cannot compress %dx%d:%dbpp frames",
get_gst_codec_name(encoder), encoder->width,
encoder->height, encoder->format->bpp);
encoder->errors++;
}
return VIDEO_ENCODER_FRAME_UNSUPPORTED;
}
if (handle_server_drops(encoder, frame_mm_time) ||
frame_mm_time < encoder->next_frame_mm_time) {
return VIDEO_ENCODER_FRAME_DROP;
}
if (!configure_pipeline(encoder)) {
encoder->errors++;
return rc;
}
GstBuffer *buffer = gst_buffer_new();
GstMemory *mem = NULL;
gsize size = GST_ROUND_UP_4(dmabuf_data->stride) * dmabuf_data->height;
uint64_t start = spice_get_monotonic_time_ns();
mem = gst_dmabuf_allocator_alloc_with_flags(encoder->allocator,
dmabuf_data->drm_dma_buf_fd,
size,
GST_FD_MEMORY_FLAG_DONT_CLOSE);
if (!mem) {
return rc;
}
gst_buffer_append_memory(buffer, mem);
gst_mini_object_weak_ref(GST_MINI_OBJECT(mem),
(GstMiniObjectNotify)spice_gst_mem_free_cb,
dmabuf_data);
GstFlowReturn ret = gst_app_src_push_buffer(encoder->appsrc, buffer);
if (ret != GST_FLOW_OK) {
spice_warning("GStreamer error: unable to push source buffer (%d)", ret);
return rc;
}
rc = pull_compressed_buffer(encoder, outbuf);
if (rc != VIDEO_ENCODER_FRAME_ENCODE_DONE) {
/* The input buffer will be stuck in the pipeline, preventing
* later ones from being processed. Furthermore something went
* wrong with this pipeline, so it may be safer to rebuild it
* from scratch.
*/
free_pipeline(encoder);
encoder->errors++;
return rc;
}
uint32_t last_mm_time = get_last_frame_mm_time(encoder);
add_frame(encoder, frame_mm_time, spice_get_monotonic_time_ns() - start,
(*outbuf)->size);
int32_t refill = encoder->bit_rate * (frame_mm_time - last_mm_time) / MSEC_PER_SEC / 8;
encoder->vbuffer_free = MIN(encoder->vbuffer_free + refill,
encoder->vbuffer_size) - (*outbuf)->size;
server_increase_bit_rate(encoder, frame_mm_time);
update_next_frame_mm_time(encoder);
return rc;
}
static void spice_gst_encoder_client_stream_report(VideoEncoder *video_encoder,
uint32_t num_frames,
uint32_t num_drops,
@ -1758,6 +1871,7 @@ VideoEncoder *gstreamer_encoder_new(SpiceVideoCodecType codec_type,
SpiceGstEncoder *encoder = g_new0(SpiceGstEncoder, 1);
encoder->base.destroy = spice_gst_encoder_destroy;
encoder->base.encode_frame = spice_gst_encoder_encode_frame;
encoder->base.encode_dmabuf = spice_gst_encoder_encode_dmabuf;
encoder->base.client_stream_report = spice_gst_encoder_client_stream_report;
encoder->base.notify_server_frame_drop = spice_gst_encoder_notify_server_frame_drop;
encoder->base.get_bit_rate = spice_gst_encoder_get_bit_rate;
@ -1772,6 +1886,7 @@ VideoEncoder *gstreamer_encoder_new(SpiceVideoCodecType codec_type,
encoder->bitmap_ref = bitmap_ref;
encoder->bitmap_unref = bitmap_unref;
encoder->format = GSTREAMER_FORMAT_INVALID;
encoder->allocator = gst_dmabuf_allocator_new();
pthread_mutex_init(&encoder->outbuf_mutex, NULL);
pthread_cond_init(&encoder->outbuf_cond, NULL);