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https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-12-18 08:56:45 -05:00
Make buffer data point to memory blocks
Make buffer data point to a registered memory block by its mem_id. Add some more helpers to allocate memfd backed memory. Allocate buffers in memfd so that we easily share them between client and server. Update pts and seq in v4l2 now that this change will actually be visible at the client.
This commit is contained in:
Wim Taymans
parent
98993c680b
commit
1169c2419b
19 changed files with 383 additions and 356 deletions
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@ -25,6 +25,7 @@
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#include <linux/videodev2.h>
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#include <spa/node.h>
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#include <spa/memory.h>
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#include <spa/video/format.h>
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#include <spa/debug.h>
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@ -54,8 +55,7 @@ struct _V4l2Buffer {
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SpaMeta metas[1];
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SpaMetaHeader header;
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SpaData datas[1];
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SpaV4l2Source *source;
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SpaBuffer *imported;
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SpaBuffer *outbuf;
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bool outstanding;
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struct v4l2_buffer v4l2_buffer;
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V4l2Buffer *next;
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@ -102,7 +102,8 @@ typedef struct {
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enum v4l2_memory memtype;
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struct v4l2_requestbuffers reqbuf;
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V4l2Buffer buffers[MAX_BUFFERS];
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SpaMemory *alloc_mem;
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V4l2Buffer *alloc_buffers;
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V4l2Buffer *ready;
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uint32_t ready_count;
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@ -408,7 +408,7 @@ spa_v4l2_set_format (SpaV4l2Source *this, V4l2Format *f, bool try_only)
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state->info.params = state->params;
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state->params[0] = &state->param_buffers.param;
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state->param_buffers.param.type = SPA_ALLOC_PARAM_TYPE_BUFFERS;
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state->param_buffers.param.size = sizeof (&state->buffers);
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state->param_buffers.param.size = sizeof (state->param_buffers);
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state->param_buffers.minsize = fmt.fmt.pix.sizeimage;
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state->param_buffers.stride = fmt.fmt.pix.bytesperline;
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state->param_buffers.min_buffers = 2;
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@ -459,7 +459,9 @@ mmap_read (SpaV4l2Source *this)
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}
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}
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b = &state->buffers[buf.index];
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b = &state->alloc_buffers[buf.index];
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b->header.seq = buf.sequence;
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b->header.pts = (uint64_t)buf.timestamp.tv_sec * 1000000000lu + (uint64_t)buf.timestamp.tv_usec * 1000lu;
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b->next = state->ready;
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state->ready = b;
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state->ready_count++;
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@ -489,7 +491,7 @@ static void
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spa_v4l2_buffer_recycle (SpaV4l2Source *this, uint32_t buffer_id)
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{
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SpaV4l2State *state = &this->state[0];
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V4l2Buffer *b = &state->buffers[buffer_id];
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V4l2Buffer *b = &state->alloc_buffers[buffer_id];
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b->outstanding = false;
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@ -523,24 +525,39 @@ spa_v4l2_import_buffers (SpaV4l2Source *this, SpaBuffer **buffers, uint32_t n_bu
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}
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state->reqbuf = reqbuf;
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if (state->alloc_mem)
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spa_memory_free (state->alloc_mem->pool_id, state->alloc_mem->id);
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state->alloc_mem = spa_memory_alloc_with_fd (0, NULL, sizeof (V4l2Buffer) * reqbuf.count);
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state->alloc_buffers = spa_memory_ensure_ptr (state->alloc_mem);
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for (i = 0; i < reqbuf.count; i++) {
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V4l2Buffer *b;
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uint32_t mem_id;
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SpaMemory *mem;
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SpaData *d = SPA_BUFFER_DATAS (buffers[i]);
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b = &state->buffers[i];
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b = &state->alloc_buffers[i];
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b->buffer.mem_id = state->alloc_mem->id;
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b->buffer.offset = sizeof (V4l2Buffer) * i;
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b->buffer.size = sizeof (V4l2Buffer);
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b->buffer.id = SPA_ID_INVALID;
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b->outbuf = buffers[i];
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b->outstanding = true;
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fprintf (stderr, "import buffer %p\n", buffers[i]);
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b->source = this;
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b->buffer.id = SPA_ID_INVALID;
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b->imported = buffers[i];
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b->outstanding = true;
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mem_id = SPA_BUFFER_DATAS (buffers[i])[0].mem_id;
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if (!(mem = spa_memory_find (0, mem_id))) {
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fprintf (stderr, "invalid memory on buffer %p\n", buffers[i]);
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continue;
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}
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CLEAR (b->v4l2_buffer);
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b->v4l2_buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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b->v4l2_buffer.memory = state->memtype;
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b->v4l2_buffer.index = i;
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b->v4l2_buffer.m.userptr = (unsigned long) SPA_BUFFER_DATAS (buffers[i])[0].ptr;
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b->v4l2_buffer.length = SPA_BUFFER_DATAS (buffers[i])[0].size;
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b->v4l2_buffer.m.userptr = (unsigned long) ((uint8_t*)mem->ptr + d[0].offset);
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b->v4l2_buffer.length = d[0].size;
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spa_v4l2_buffer_recycle (this, buffers[i]->id);
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}
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@ -584,9 +601,15 @@ mmap_init (SpaV4l2Source *this,
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state->reqbuf = reqbuf;
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if (state->alloc_mem)
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spa_memory_free (state->alloc_mem->pool_id, state->alloc_mem->id);
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state->alloc_mem = spa_memory_alloc_with_fd (0, NULL, sizeof (V4l2Buffer) * reqbuf.count);
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state->alloc_buffers = spa_memory_ensure_ptr (state->alloc_mem);
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for (i = 0; i < reqbuf.count; i++) {
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struct v4l2_buffer buf;
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V4l2Buffer *b;
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SpaMemory *mem;
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CLEAR (buf);
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buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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@ -598,13 +621,14 @@ mmap_init (SpaV4l2Source *this,
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return SPA_RESULT_ERROR;
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}
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b = &state->buffers[i];
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b = &state->alloc_buffers[i];
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b->buffer.id = i;
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b->buffer.mem_id = state->alloc_mem->id;
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b->buffer.offset = sizeof (V4l2Buffer) * i;
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b->buffer.size = sizeof (V4l2Buffer);
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buffers[i] = &b->buffer;
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b->source = this;
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b->buffer.id = i;
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b->buffer.size = sizeof (V4l2Buffer);
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b->buffer.n_metas = 1;
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b->buffer.metas = offsetof (V4l2Buffer, metas);
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b->buffer.n_datas = 1;
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@ -619,6 +643,14 @@ mmap_init (SpaV4l2Source *this,
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b->metas[0].offset = offsetof (V4l2Buffer, header);
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b->metas[0].size = sizeof (b->header);
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mem = spa_memory_alloc (0);
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mem->flags = SPA_MEMORY_FLAG_READABLE;
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mem->size = buf.length;
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b->datas[0].mem_id = mem->id;
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b->datas[0].offset = 0;
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b->datas[0].size = buf.length;
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b->datas[0].stride = state->fmt.fmt.pix.bytesperline;
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if (state->export_buf) {
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struct v4l2_exportbuffer expbuf;
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@ -630,39 +662,25 @@ mmap_init (SpaV4l2Source *this,
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continue;
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}
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mem->fd = expbuf.fd;
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mem->type = "dmabuf";
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mem->ptr = NULL;
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b->dmafd = expbuf.fd;
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b->datas[0].type = SPA_DATA_TYPE_FD;
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b->datas[0].ptr = SPA_INT_TO_PTR (b->dmafd);
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b->datas[0].ptr_type = "dmabuf";
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b->datas[0].offset = 0;
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b->datas[0].size = buf.length;
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b->datas[0].stride = state->fmt.fmt.pix.bytesperline;
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} else {
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#if 1
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b->datas[0].type = SPA_DATA_TYPE_MEMPTR;
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b->datas[0].ptr_type = "sysmem";
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b->datas[0].ptr = mmap (NULL,
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buf.length,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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state->fd,
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buf.m.offset);
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b->datas[0].offset = 0;
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b->datas[0].size = buf.length;
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if (b->datas[0].ptr == MAP_FAILED) {
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mem->fd = -1;
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mem->type = "sysmem";
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mem->ptr = mmap (NULL,
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buf.length,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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state->fd,
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buf.m.offset);
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if (mem->ptr == MAP_FAILED) {
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perror ("mmap");
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continue;
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}
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#else
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b->datas[0].type = SPA_DATA_TYPE_FD;
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b->datas[0].ptr = &state->fd;
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b->datas[0].ptr_type = "dmabuf";
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b->datas[0].offset = buf.m.offset;
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b->datas[0].size = buf.length;
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b->datas[0].stride = state->fmt.fmt.pix.bytesperline;
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#endif
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}
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b->imported = &b->buffer;
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b->outbuf = &b->buffer;
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b->outstanding = true;
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CLEAR (b->v4l2_buffer);
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@ -772,17 +790,20 @@ spa_v4l2_stop (SpaV4l2Source *this)
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for (i = 0; i < state->reqbuf.count; i++) {
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V4l2Buffer *b;
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SpaMemory *mem;
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b = &state->buffers[i];
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b = &state->alloc_buffers[i];
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if (b->outstanding) {
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fprintf (stderr, "queueing outstanding buffer %p\n", b);
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spa_v4l2_buffer_recycle (this, i);
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}
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mem = spa_memory_find (0, b->datas[0].mem_id);
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if (state->export_buf) {
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close (b->dmafd);
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close (mem->fd);
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} else {
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munmap (b->datas[0].ptr, b->datas[0].size);
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munmap (mem->ptr, mem->size);
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}
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spa_memory_free (0, mem->id);
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}
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state->have_buffers = false;
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