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#include <stdio.h>
#include <stdint.h>
#include <time.h>
#include "glib.h"
#include "ufo-roof.h"
#include "ufo-roof-buffer.h"
// This is currently not thread safe. With dual-filter architecture this will be called sequentially.
UfoRoofBuffer *ufo_roof_buffer_new(UfoRoofConfig *cfg, guint n_dims, guint max_datasets, GError **error) {
if ((n_dims < 1)||(n_dims > 2))
roof_new_error(error, "Unsupported number of dimmensions %u (only plain and 2D ROOF structure is currently supported)", n_dims);
UfoRoofBuffer *buffer = (UfoRoofBuffer*)calloc(1, sizeof(UfoRoofBuffer));
if (!buffer) roof_new_error(error, "Can't allocate UfoRoofBuffer");
buffer->max_datasets = max_datasets;
buffer->ring_size = cfg->buffer_size;
buffer->drop_buffers = cfg->drop_buffers;
buffer->latency_buffers = cfg->latency_buffers;
buffer->n_dims = n_dims;
buffer->dataset_size = cfg->dataset_size;
buffer->dataset_dims[0] = cfg->fan_bins * cfg->bit_depth / 8;
buffer->dataset_dims[1] = cfg->fan_projections;
buffer->fragment_size = cfg->payload_size;
buffer->fragment_dims[0] = cfg->channels_per_module * cfg->bit_depth / 8;
buffer->fragment_dims[1] = buffer->fragment_size / buffer->fragment_dims[0];
buffer->fragments_per_dataset = buffer->dataset_size / buffer->fragment_size;
buffer->fragments_per_stream = buffer->fragments_per_dataset / cfg->n_streams;
// printf("Configuration: dataset: %u - %u fragments (%u streams x %u) x %u bytes\n", buffer->dataset_size, buffer->fragments_per_dataset, cfg->n_streams, buffer->fragments_per_stream, buffer->fragment_size);
buffer->ring_buffer = malloc(buffer->ring_size * buffer->dataset_size);
buffer->n_fragments = (_Atomic guint*)calloc(buffer->ring_size, sizeof(_Atomic int));
buffer->stream_fragment = (guint*)calloc(cfg->n_streams, sizeof(guint));
#ifdef UFO_ROOF_INDEPENDENT_STREAMS
buffer->first_id = malloc(buffer->ring_size * sizeof(guint64));
if (!buffer->first_id) roof_new_error(error, "Can't allocate first_id buffer for ROOF datasets");
for (guint i = 0; i < buffer->ring_size; i++)
buffer->first_id[i] = (guint64)-1;
#else
buffer->first_id = (guint64)-1;
#endif
if ((!buffer->ring_buffer)||(!buffer->n_fragments)||(!buffer->stream_fragment)) {
ufo_roof_buffer_free(buffer);
roof_new_error(error, "Can't allocate ring buffer for ROOF datasets, total size %u", buffer->ring_size * buffer->dataset_size);
}
return buffer;
}
void ufo_roof_buffer_free(UfoRoofBuffer *buffer) {
if (buffer) {
#ifdef UFO_ROOF_INDEPENDENT_STREAMS
if (buffer->first_id)
free(buffer->first_id);
#endif
if (buffer->ring_buffer)
free(buffer->ring_buffer);
if (buffer->n_fragments)
free(buffer->n_fragments);
if (buffer->stream_fragment)
free(buffer->stream_fragment);
free(buffer);
}
}
// fragment_id is numbered from 1 (0 - means auto)
gboolean ufo_roof_buffer_set_fragment(UfoRoofBuffer *buffer, guint stream_id, guint64 fragment_id, gconstpointer fragment, GError **error) {
gboolean ready = FALSE;
guint buffer_id;
guint64 first_id;
guint64 dataset_id;
if (!fragment_id) {
fragment_id = ++buffer->stream_fragment[stream_id];
}
// If we have packets of arbitrary size, we would need dataset_id transferred along with packet_id (otherwise complex guessing is required)
dataset_id = (fragment_id - 1) / buffer->fragments_per_stream;
fragment_id = (fragment_id - 1) % buffer->fragments_per_stream;
#ifdef UFO_ROOF_INDEPENDENT_STREAMS
if (buffer->first_id[stream_id] == (guint64)-1)
buffer->first_id[stream_id] = dataset_id;
first_id = buffer->first_id[stream_id];
#else
if (buffer->first_id == (guint64)-1)
buffer->first_id = dataset_id;
first_id = buffer->first_id;
#endif
if (dataset_id < first_id)
return FALSE;
dataset_id -= first_id;
buffer_id = dataset_id % buffer->ring_size;
// FIXME: Currently, this produces too much output. Introduce some kind of debugging mode?
if (dataset_id < buffer->current_id) {
roof_network_error_with_retval(error, FALSE, "Late arrived packet for dataset %li, currently processing %li", dataset_id, buffer->current_id);
return FALSE;
}
if ((buffer->max_datasets)&&(dataset_id >= buffer->max_datasets)) {
// printf("Stream %i: dataset %li < %li, first_id: %li\n", stream_id, dataset_id, buffer->max_datasets, first_id);
return FALSE;
}
// We are not fast enough, new packets are arrvining to fast
if (dataset_id >= (buffer->current_id + buffer->ring_size)) {
// FIXME: Broken packets sanity checks? Allocate additional buffers on demand?
root_set_network_error(error, "Ring buffer exhausted. Get packet for dataset %li. Dropping datasets from %li to %li, dataset %li has %i parts of %i completed",
dataset_id, buffer->current_id, dataset_id - (buffer->ring_size - buffer->drop_buffers), buffer->current_id, buffer->n_fragments[buffer_id], buffer->fragments_per_dataset);
// FIXME: Send semi-complete buffers further?
// FIXME: Or shall we drop more if larger buffers are allocated?
if ((dataset_id - buffer->current_id) > 2 * buffer->ring_size) {
memset(buffer->n_fragments, 0, buffer->ring_size * sizeof(_Atomic guint));
buffer->current_id = dataset_id;
} else {
for (guint i = buffer->current_id; i <= (dataset_id - (buffer->ring_size - buffer->drop_buffers)); i++)
buffer->n_fragments[i%buffer->ring_size] = 0;
buffer->current_id = dataset_id - (buffer->ring_size - buffer->drop_buffers) + 1;
}
if (buffer->n_fragments[buffer->current_id%buffer->ring_size] == buffer->fragments_per_dataset)
ready = TRUE;
// FIXME: In mult-threaded case, we need to ensure that all threads are stopped writting here (and generator is not reading) before we can reassign buffer to the new dataset.
// To avoid locking, we can store per-thread 'current_id' and only proceed to writting when all per-threads current_ids are equal or above the global value
// The updates may happen after writting/reading is finished.
}
/*
printf("dataset: %lu (%u) is %u of %u complete, new packet: %lu (%ux%u %lu), packet_size: %u [%x]\n",
dataset_id, buffer_id,
buffer->n_fragments[buffer_id] + 1, buffer->fragments_per_dataset,
stream_id * buffer->fragments_per_stream + fragment_id, stream_id, buffer->fragments_per_stream, fragment_id,
buffer->fragment_size, ((uint32_t*)fragment)[0]
);
*/
uint8_t *dataset_buffer = buffer->ring_buffer + buffer_id * buffer->dataset_size;
if (buffer->n_dims == 2) {
uint8_t *fragment_buffer = dataset_buffer +
stream_id * buffer->fragment_dims[0] + // x-coordinate
(fragment_id * buffer->fragment_dims[1]) * buffer->dataset_dims[0]; // y-coordinate
for (guint i = 0; i < buffer->fragment_dims[1]; ++i) {
memcpy(fragment_buffer + i * buffer->dataset_dims[0], (uint8_t*)fragment + i * buffer->fragment_dims[0], buffer->fragment_dims[0]);
}
} else {
// 1D stracture, simply putting fragment at the appropriate position in the stream
uint8_t *fragment_buffer = dataset_buffer + (stream_id * buffer->fragments_per_stream + fragment_id) * buffer->fragment_size;
memcpy(fragment_buffer, fragment, buffer->fragment_size);
}
// FIXME: Sanity checks: verify is not a dublicate fragment?
atomic_fetch_add(&buffer->n_fragments[buffer_id], 1);
if (buffer->n_fragments[buffer_id] == buffer->fragments_per_dataset) {
// FIXME: what about a complete dataset blocked by earlier one with only a few framents missing?
if (dataset_id == buffer->current_id)
ready = TRUE;
else if ((buffer->latency_buffers)&&(dataset_id >= (buffer->current_id + buffer->latency_buffers)))
ready = ufo_roof_buffer_skip_to_ready(buffer);
}
return ready;
}
gboolean ufo_roof_buffer_skip_to_ready(UfoRoofBuffer *buffer) {
for (guint i = 0; i < buffer->ring_size; i++) {
guint64 id = buffer->current_id + i;
guint buffer_id = id % buffer->ring_size;
if (buffer->n_fragments[buffer_id] == buffer->fragments_per_dataset) {
buffer->current_id = id;
return TRUE;
}
// printf("Skipping event %lu (%u), only %u of %u fragments are ready\n", id, buffer_id, buffer->n_fragments[buffer_id], buffer->fragments_per_dataset);
buffer->n_fragments[buffer_id] = 0;
}
return FALSE;
}
gboolean ufo_roof_buffer_get_dataset(UfoRoofBuffer *buffer, gpointer output_buffer, gulong *seqid, GError **error) {
guint buffer_id = buffer->current_id % buffer->ring_size;
void *dataset_buffer = buffer->ring_buffer + buffer_id * buffer->dataset_size;
// FIXME: what about a complete dataset blocked by earlier one with only a few framents missing?
if (buffer->n_fragments[buffer_id] < buffer->fragments_per_dataset) return FALSE;
memcpy(output_buffer, dataset_buffer, buffer->dataset_size);
if (seqid) *seqid = buffer->current_id;
buffer->n_fragments[buffer_id] = 0;
buffer->current_id += 1;
return TRUE;
}
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