mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-02 09:01:50 -05:00
buffers: refactor buffer allocation code
Refactor the code in pw_link to allocate buffers. Add some more options and make it generally useful to negotiate buffers between 2 ports.
This commit is contained in:
Wim Taymans
parent
93a2defbb8
commit
4a47bf4706
3 changed files with 374 additions and 0 deletions
310
src/pipewire/buffers.c
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310
src/pipewire/buffers.c
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/* PipeWire
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*
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* Copyright © 2019 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <spa/node/utils.h>
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#include <spa/pod/parser.h>
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#include <spa/param/param.h>
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#include <spa/buffer/alloc.h>
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#include <spa/debug/node.h>
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#include <spa/debug/pod.h>
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#include <spa/debug/format.h>
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#include "pipewire/private.h"
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#include "buffers.h"
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#define NAME "buffers"
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#define MAX_BUFFERS 64
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struct port {
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struct spa_node *node;
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enum spa_direction direction;
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uint32_t port_id;
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};
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/* Allocate an array of buffers that can be shared */
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static int alloc_buffers(struct pw_mempool *pool,
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uint32_t n_buffers,
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uint32_t n_params,
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struct spa_pod **params,
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uint32_t n_datas,
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uint32_t *data_sizes,
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int32_t *data_strides,
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uint32_t *data_aligns,
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uint32_t flags,
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struct pw_buffers *allocation)
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{
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struct spa_buffer **buffers;
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void *skel, *data;
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uint32_t i;
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uint32_t n_metas;
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struct spa_meta *metas;
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struct spa_data *datas;
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struct pw_memblock *m;
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struct spa_buffer_alloc_info info = { 0, };
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if (!SPA_FLAG_IS_SET(flags, PW_BUFFERS_FLAG_SHARED))
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SPA_FLAG_SET(info.flags, SPA_BUFFER_ALLOC_FLAG_INLINE_ALL);
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n_metas = 0;
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metas = alloca(sizeof(struct spa_meta) * n_params);
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datas = alloca(sizeof(struct spa_data) * n_datas);
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/* collect metadata */
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for (i = 0; i < n_params; i++) {
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if (spa_pod_is_object_type (params[i], SPA_TYPE_OBJECT_ParamMeta)) {
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uint32_t type, size;
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if (spa_pod_parse_object(params[i],
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SPA_TYPE_OBJECT_ParamMeta, NULL,
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SPA_PARAM_META_type, SPA_POD_Id(&type),
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SPA_PARAM_META_size, SPA_POD_Int(&size)) < 0)
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continue;
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pw_log_debug(NAME" %p: enable meta %d %d", allocation, type, size);
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metas[n_metas].type = type;
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metas[n_metas].size = size;
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n_metas++;
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}
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}
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for (i = 0; i < n_datas; i++) {
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struct spa_data *d = &datas[i];
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spa_zero(*d);
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if (data_sizes[i] > 0) {
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d->type = SPA_DATA_MemPtr;
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d->maxsize = data_sizes[i];
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SPA_FLAG_SET(d->flags, SPA_DATA_FLAG_READWRITE);
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} else {
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d->type = SPA_ID_INVALID;
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d->maxsize = 0;
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}
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if (SPA_FLAG_IS_SET(flags, PW_BUFFERS_FLAG_DYNAMIC))
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SPA_FLAG_SET(d->flags, SPA_DATA_FLAG_DYNAMIC);
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}
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spa_buffer_alloc_fill_info(&info, n_metas, metas, n_datas, datas, data_aligns);
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buffers = calloc(1, info.max_align + n_buffers * (sizeof(struct spa_buffer *) + info.skel_size));
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if (buffers == NULL)
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return -errno;
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skel = SPA_MEMBER(buffers, n_buffers * sizeof(struct spa_buffer *), void);
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skel = SPA_PTR_ALIGN(skel, info.max_align, void);
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if (SPA_FLAG_IS_SET(flags, PW_BUFFERS_FLAG_SHARED)) {
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/* pointer to buffer structures */
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m = pw_mempool_alloc(pool,
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PW_MEMBLOCK_FLAG_READWRITE |
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PW_MEMBLOCK_FLAG_SEAL |
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PW_MEMBLOCK_FLAG_MAP,
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SPA_DATA_MemFd,
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n_buffers * info.mem_size);
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if (m == NULL)
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return -errno;
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data = m->map->ptr;
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} else {
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m = NULL;
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data = NULL;
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}
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pw_log_debug(NAME" %p: layout buffers skel:%p data:%p", allocation, skel, data);
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spa_buffer_alloc_layout_array(&info, n_buffers, buffers, skel, data);
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allocation->mem = m;
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allocation->n_buffers = n_buffers;
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allocation->buffers = buffers;
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allocation->flags = flags;
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return 0;
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}
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static int
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param_filter(struct pw_buffers *this,
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struct port *in_port,
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struct port *out_port,
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uint32_t id,
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struct spa_pod_builder *result)
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{
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uint8_t ibuf[4096];
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struct spa_pod_builder ib = { 0 };
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struct spa_pod *oparam, *iparam;
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uint32_t iidx, oidx, num = 0;
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int res;
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for (iidx = 0;;) {
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spa_pod_builder_init(&ib, ibuf, sizeof(ibuf));
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pw_log_debug(NAME" %p: input param %d id:%d", this, iidx, id);
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if ((res = spa_node_port_enum_params_sync(in_port->node,
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in_port->direction, in_port->port_id,
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id, &iidx, NULL, &iparam, &ib)) < 0)
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break;
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if (res != 1) {
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if (num > 0)
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break;
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iparam = NULL;
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}
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if (pw_log_level_enabled(SPA_LOG_LEVEL_DEBUG) && iparam != NULL)
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spa_debug_pod(2, NULL, iparam);
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for (oidx = 0;;) {
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pw_log_debug(NAME" %p: output param %d id:%d", this, oidx, id);
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if (spa_node_port_enum_params_sync(out_port->node,
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out_port->direction, out_port->port_id,
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id, &oidx, iparam, &oparam, result) != 1) {
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break;
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}
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if (pw_log_level_enabled(SPA_LOG_LEVEL_DEBUG))
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spa_debug_pod(2, NULL, oparam);
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num++;
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}
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if (iparam == NULL && num == 0)
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break;
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}
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return num;
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}
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static struct spa_pod *find_param(struct spa_pod **params, uint32_t n_params, uint32_t type)
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{
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uint32_t i;
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for (i = 0; i < n_params; i++) {
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if (spa_pod_is_object_type(params[i], type))
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return params[i];
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}
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return NULL;
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}
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SPA_EXPORT
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int pw_buffers_negotiate(struct pw_core *core, uint32_t flags,
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struct spa_node *outnode, uint32_t out_port_id,
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struct spa_node *innode, uint32_t in_port_id,
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struct pw_buffers *result)
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{
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struct spa_pod **params, *param;
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uint8_t buffer[4096];
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struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
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uint32_t i, offset, n_params;
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uint32_t max_buffers;
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size_t minsize = 8192, stride = 0, align;
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uint32_t data_sizes[1];
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int32_t data_strides[1];
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uint32_t data_aligns[1];
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struct port output = { outnode, SPA_DIRECTION_OUTPUT, out_port_id };
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struct port input = { innode, SPA_DIRECTION_INPUT, in_port_id };
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int res;
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n_params = param_filter(result, &input, &output, SPA_PARAM_Buffers, &b);
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n_params += param_filter(result, &input, &output, SPA_PARAM_Meta, &b);
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params = alloca(n_params * sizeof(struct spa_pod *));
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for (i = 0, offset = 0; i < n_params; i++) {
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params[i] = SPA_MEMBER(buffer, offset, struct spa_pod);
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spa_pod_fixate(params[i]);
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pw_log_debug(NAME" %p: fixated param %d:", result, i);
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if (pw_log_level_enabled(SPA_LOG_LEVEL_DEBUG))
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spa_debug_pod(2, NULL, params[i]);
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offset += SPA_ROUND_UP_N(SPA_POD_SIZE(params[i]), 8);
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}
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max_buffers = MAX_BUFFERS;
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minsize = stride = 0;
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align = 8;
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param = find_param(params, n_params, SPA_TYPE_OBJECT_ParamBuffers);
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if (param) {
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uint32_t qmax_buffers = max_buffers,
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qminsize = minsize, qstride = stride, qalign = align;
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spa_pod_parse_object(param,
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SPA_TYPE_OBJECT_ParamBuffers, NULL,
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SPA_PARAM_BUFFERS_buffers, SPA_POD_Int(&qmax_buffers),
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SPA_PARAM_BUFFERS_size, SPA_POD_Int(&qminsize),
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SPA_PARAM_BUFFERS_stride, SPA_POD_Int(&qstride),
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SPA_PARAM_BUFFERS_align, SPA_POD_Int(&qalign));
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max_buffers =
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qmax_buffers == 0 ? max_buffers : SPA_MIN(qmax_buffers,
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max_buffers);
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minsize = SPA_MAX(minsize, qminsize);
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stride = SPA_MAX(stride, qstride);
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align = SPA_MAX(align, qalign);
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pw_log_debug(NAME" %p: %d %d %d %d -> %zd %zd %d %zd", result,
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qminsize, qstride, qmax_buffers, qalign,
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minsize, stride, max_buffers, align);
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} else {
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pw_log_warn(NAME" %p: no buffers param", result);
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minsize = 8192;
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max_buffers = 4;
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}
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if (SPA_FLAG_IS_SET(flags, PW_BUFFERS_FLAG_NO_MEM))
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minsize = 0;
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data_sizes[0] = minsize;
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data_strides[0] = stride;
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data_aligns[0] = align;
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if ((res = alloc_buffers(core->pool,
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max_buffers,
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n_params,
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params,
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1,
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data_sizes, data_strides,
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data_aligns,
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flags,
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result)) < 0) {
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pw_log_error(NAME" %p: can't alloc buffers: %s", result, spa_strerror(res));
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}
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return res;
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}
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SPA_EXPORT
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void pw_buffers_clear(struct pw_buffers *buffers)
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{
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if (buffers->mem)
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pw_memblock_unref(buffers->mem);
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free(buffers->buffers);
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spa_zero(*buffers);
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}
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SPA_EXPORT
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void pw_buffers_move(struct pw_buffers *dest, struct pw_buffers *src)
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{
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*dest = *src;
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spa_zero(*src);
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}
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61
src/pipewire/buffers.h
Normal file
61
src/pipewire/buffers.h
Normal file
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@ -0,0 +1,61 @@
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/* PipeWire
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*
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* Copyright © 2019 Wim Taymans
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef PIPEWIRE_BUFFERS_H
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#define PIPEWIRE_BUFFERS_H
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#include <spa/node/node.h>
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#include <pipewire/core.h>
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#include <pipewire/mem.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define PW_BUFFERS_FLAG_NONE 0
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#define PW_BUFFERS_FLAG_NO_MEM (1<<0) /**< don't allocate buffer memory */
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#define PW_BUFFERS_FLAG_SHARED (1<<1) /**< buffers can be shared */
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#define PW_BUFFERS_FLAG_DYNAMIC (1<<2) /**< buffers have dynamic data */
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struct pw_buffers {
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struct pw_memblock *mem; /**< allocated buffer memory */
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struct spa_buffer **buffers; /**< port buffers */
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uint32_t n_buffers; /**< number of port buffers */
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uint32_t flags; /**< flags */
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};
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int pw_buffers_negotiate(struct pw_core *core, uint32_t flags,
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struct spa_node *outnode, uint32_t out_port_id,
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struct spa_node *innode, uint32_t in_port_id,
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struct pw_buffers *result);
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void pw_buffers_move(struct pw_buffers *dest, struct pw_buffers *src);
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void pw_buffers_clear(struct pw_buffers *buffers);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PIPEWIRE_BUFFERS_H */
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@ -1,5 +1,6 @@
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pipewire_headers = [
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'array.h',
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'buffers.h',
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'client.h',
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'control.h',
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'core.h',
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@ -34,6 +35,7 @@ pipewire_headers = [
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]
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pipewire_sources = [
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'buffers.c',
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'client.c',
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'control.c',
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'core.c',
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@ -47,6 +49,7 @@ pipewire_sources = [
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'main-loop.c',
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'mem.c',
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'module.c',
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'mix/floatmix.c',
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'node.c',
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'factory.c',
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'pipewire.c',
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