mirror of https://github.com/mpv-player/mpv
401 lines
11 KiB
C
401 lines
11 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <bcm_host.h>
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#include <interface/mmal/mmal.h>
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#include <interface/mmal/util/mmal_util.h>
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#include <interface/mmal/util/mmal_default_components.h>
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#include <interface/mmal/vc/mmal_vc_api.h>
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#include <libavutil/rational.h>
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#include "common/common.h"
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#include "common/msg.h"
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#include "video/mp_image.h"
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#include "hwdec.h"
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#include "common.h"
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struct priv {
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struct mp_log *log;
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struct mp_image_params params;
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MMAL_COMPONENT_T *renderer;
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bool renderer_enabled;
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// for RAM input
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MMAL_POOL_T *swpool;
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struct mp_image *current_frame;
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struct mp_rect src, dst;
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int cur_window[4]; // raw user params
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};
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// Magic alignments (in pixels) expected by the MMAL internals.
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#define ALIGN_W 32
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#define ALIGN_H 16
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// Make mpi point to buffer, assuming MMAL_ENCODING_I420.
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// buffer can be NULL.
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// Return the required buffer space.
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static size_t layout_buffer(struct mp_image *mpi, MMAL_BUFFER_HEADER_T *buffer,
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struct mp_image_params *params)
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{
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assert(params->imgfmt == IMGFMT_420P);
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mp_image_set_params(mpi, params);
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int w = MP_ALIGN_UP(params->w, ALIGN_W);
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int h = MP_ALIGN_UP(params->h, ALIGN_H);
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uint8_t *cur = buffer ? buffer->data : NULL;
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size_t size = 0;
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for (int i = 0; i < 3; i++) {
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int div = i ? 2 : 1;
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mpi->planes[i] = cur;
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mpi->stride[i] = w / div;
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size_t plane_size = h / div * mpi->stride[i];
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if (cur)
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cur += plane_size;
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size += plane_size;
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}
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return size;
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}
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static MMAL_FOURCC_T map_csp(enum mp_csp csp)
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{
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switch (csp) {
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case MP_CSP_BT_601: return MMAL_COLOR_SPACE_ITUR_BT601;
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case MP_CSP_BT_709: return MMAL_COLOR_SPACE_ITUR_BT709;
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case MP_CSP_SMPTE_240M: return MMAL_COLOR_SPACE_SMPTE240M;
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default: return MMAL_COLOR_SPACE_UNKNOWN;
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}
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}
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static void control_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
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{
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mmal_buffer_header_release(buffer);
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}
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static void input_port_cb(MMAL_PORT_T *port, MMAL_BUFFER_HEADER_T *buffer)
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{
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struct mp_image *mpi = buffer->user_data;
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talloc_free(mpi);
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}
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static void disable_renderer(struct gl_hwdec *hw)
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{
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struct priv *p = hw->priv;
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if (p->renderer_enabled) {
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mmal_port_disable(p->renderer->control);
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mmal_port_disable(p->renderer->input[0]);
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mmal_port_flush(p->renderer->control);
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mmal_port_flush(p->renderer->input[0]);
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mmal_component_disable(p->renderer);
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}
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mmal_pool_destroy(p->swpool);
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p->swpool = NULL;
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p->renderer_enabled = false;
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}
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// check_window_only: assume params and dst/src rc are unchanged
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static void update_overlay(struct gl_hwdec *hw, bool check_window_only)
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{
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struct priv *p = hw->priv;
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GL *gl = hw->gl;
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MMAL_PORT_T *input = p->renderer->input[0];
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struct mp_rect src = p->src;
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struct mp_rect dst = p->dst;
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int defs[4] = {0, 0, 0, 0};
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int *z = mpgl_get_native_display(gl, "MPV_RPI_WINDOW");
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if (!z)
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z = defs;
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// As documented in the libmpv openglcb headers.
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int display = z[0];
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int layer = z[1];
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int x = z[2];
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int y = z[3];
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if (check_window_only && memcmp(z, p->cur_window, sizeof(p->cur_window)) == 0)
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return;
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memcpy(p->cur_window, z, sizeof(p->cur_window));
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int rotate[] = {MMAL_DISPLAY_ROT0,
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MMAL_DISPLAY_ROT90,
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MMAL_DISPLAY_ROT180,
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MMAL_DISPLAY_ROT270};
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int src_w = src.x1 - src.x0, src_h = src.y1 - src.y0,
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dst_w = dst.x1 - dst.x0, dst_h = dst.y1 - dst.y0;
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int p_x, p_y;
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av_reduce(&p_x, &p_y, dst_w * src_h, src_w * dst_h, 16000);
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MMAL_DISPLAYREGION_T dr = {
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.hdr = { .id = MMAL_PARAMETER_DISPLAYREGION,
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.size = sizeof(MMAL_DISPLAYREGION_T), },
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.src_rect = { .x = src.x0, .y = src.y0,
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.width = src_w, .height = src_h },
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.dest_rect = { .x = dst.x0 + x, .y = dst.y0 + y,
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.width = dst_w, .height = dst_h },
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.layer = layer - 1, // under the GL layer
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.display_num = display,
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.pixel_x = p_x,
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.pixel_y = p_y,
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.transform = rotate[p->params.rotate / 90],
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.fullscreen = 0,
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.set = MMAL_DISPLAY_SET_SRC_RECT | MMAL_DISPLAY_SET_DEST_RECT |
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MMAL_DISPLAY_SET_LAYER | MMAL_DISPLAY_SET_NUM |
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MMAL_DISPLAY_SET_PIXEL | MMAL_DISPLAY_SET_TRANSFORM |
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MMAL_DISPLAY_SET_FULLSCREEN,
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};
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if (p->params.rotate % 180 == 90) {
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MPSWAP(int, dr.src_rect.x, dr.src_rect.y);
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MPSWAP(int, dr.src_rect.width, dr.src_rect.height);
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}
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if (mmal_port_parameter_set(input, &dr.hdr))
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MP_WARN(p, "could not set video rectangle\n");
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}
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static int enable_renderer(struct gl_hwdec *hw)
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{
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struct priv *p = hw->priv;
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MMAL_PORT_T *input = p->renderer->input[0];
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struct mp_image_params *params = &p->params;
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if (p->renderer_enabled)
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return 0;
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if (!params->imgfmt)
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return -1;
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bool opaque = params->imgfmt == IMGFMT_MMAL;
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input->format->encoding = opaque ? MMAL_ENCODING_OPAQUE : MMAL_ENCODING_I420;
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input->format->es->video.width = MP_ALIGN_UP(params->w, ALIGN_W);
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input->format->es->video.height = MP_ALIGN_UP(params->h, ALIGN_H);
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input->format->es->video.crop = (MMAL_RECT_T){0, 0, params->w, params->h};
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input->format->es->video.par = (MMAL_RATIONAL_T){params->p_w, params->p_h};
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input->format->es->video.color_space = map_csp(params->color.space);
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if (mmal_port_format_commit(input))
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return -1;
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input->buffer_num = MPMAX(input->buffer_num_min,
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input->buffer_num_recommended) + 3;
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input->buffer_size = MPMAX(input->buffer_size_min,
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input->buffer_size_recommended);
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if (!opaque) {
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size_t size = layout_buffer(&(struct mp_image){0}, NULL, params);
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if (input->buffer_size != size) {
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MP_FATAL(hw, "We disagree with MMAL about buffer sizes.\n");
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return -1;
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}
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p->swpool = mmal_pool_create(input->buffer_num, input->buffer_size);
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if (!p->swpool) {
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MP_FATAL(hw, "Could not allocate buffer pool.\n");
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return -1;
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}
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}
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update_overlay(hw, false);
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p->renderer_enabled = true;
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if (mmal_port_enable(p->renderer->control, control_port_cb))
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return -1;
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if (mmal_port_enable(input, input_port_cb))
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return -1;
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if (mmal_component_enable(p->renderer)) {
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MP_FATAL(hw, "Failed to enable video renderer.\n");
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return -1;
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}
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return 0;
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}
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static void overlay_adjust(struct gl_hwdec *hw,
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struct mp_rect *src, struct mp_rect *dst)
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{
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struct priv *p = hw->priv;
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p->src = *src;
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p->dst = *dst;
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update_overlay(hw, false);
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}
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static int reinit(struct gl_hwdec *hw, struct mp_image_params *params)
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{
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struct priv *p = hw->priv;
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p->params = *params;
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*params = (struct mp_image_params){0};
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disable_renderer(hw);
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if (enable_renderer(hw) < 0)
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return -1;
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return 0;
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}
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static void free_mmal_buffer(void *arg)
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{
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MMAL_BUFFER_HEADER_T *buffer = arg;
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mmal_buffer_header_release(buffer);
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}
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static struct mp_image *upload(struct gl_hwdec *hw, struct mp_image *hw_image)
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{
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struct priv *p = hw->priv;
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MMAL_BUFFER_HEADER_T *buffer = mmal_queue_wait(p->swpool->queue);
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if (!buffer) {
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MP_ERR(hw, "Can't allocate buffer.\n");
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return NULL;
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}
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mmal_buffer_header_reset(buffer);
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struct mp_image *new_ref = mp_image_new_custom_ref(NULL, buffer,
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free_mmal_buffer);
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if (!new_ref) {
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mmal_buffer_header_release(buffer);
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MP_ERR(hw, "Out of memory.\n");
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return NULL;
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}
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mp_image_setfmt(new_ref, IMGFMT_MMAL);
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new_ref->planes[3] = (void *)buffer;
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struct mp_image dmpi = {0};
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buffer->length = layout_buffer(&dmpi, buffer, &p->params);
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mp_image_copy(&dmpi, hw_image);
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return new_ref;
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}
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static int overlay_frame(struct gl_hwdec *hw, struct mp_image *hw_image)
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{
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struct priv *p = hw->priv;
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mp_image_unrefp(&p->current_frame);
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if (!hw_image) {
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disable_renderer(hw);
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return 0;
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}
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if (enable_renderer(hw) < 0)
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return -1;
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update_overlay(hw, true);
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struct mp_image *mpi = NULL;
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if (hw_image->imgfmt == IMGFMT_MMAL) {
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mpi = mp_image_new_ref(hw_image);
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} else {
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mpi = upload(hw, hw_image);
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}
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if (!mpi) {
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disable_renderer(hw);
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return -1;
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}
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MMAL_BUFFER_HEADER_T *ref = (void *)mpi->planes[3];
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// Assume this field is free for use by us.
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ref->user_data = mpi;
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if (mmal_port_send_buffer(p->renderer->input[0], ref)) {
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MP_ERR(hw, "could not queue picture!\n");
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talloc_free(mpi);
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return -1;
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}
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return 0;
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}
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static void destroy(struct gl_hwdec *hw)
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{
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struct priv *p = hw->priv;
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disable_renderer(hw);
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if (p->renderer)
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mmal_component_release(p->renderer);
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mmal_vc_deinit();
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}
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static int create(struct gl_hwdec *hw)
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{
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struct priv *p = talloc_zero(hw, struct priv);
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hw->priv = p;
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p->log = hw->log;
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bcm_host_init();
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if (mmal_vc_init()) {
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MP_FATAL(hw, "Could not initialize MMAL.\n");
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return -1;
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}
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if (mmal_component_create(MMAL_COMPONENT_DEFAULT_VIDEO_RENDERER, &p->renderer))
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{
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MP_FATAL(hw, "Could not create MMAL renderer.\n");
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mmal_vc_deinit();
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return -1;
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}
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return 0;
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}
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static bool test_format(struct gl_hwdec *hw, int imgfmt)
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{
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return imgfmt == IMGFMT_MMAL || imgfmt == IMGFMT_420P;
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}
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const struct gl_hwdec_driver gl_hwdec_rpi_overlay = {
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.name = "rpi-overlay",
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.api = HWDEC_RPI,
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.test_format = test_format,
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.create = create,
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.reinit = reinit,
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.overlay_frame = overlay_frame,
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.overlay_adjust = overlay_adjust,
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.destroy = destroy,
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};
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