mirror of
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119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
/*****************************************************************************
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# #
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# uStreamer - Lightweight and fast MJPEG-HTTP streamer. #
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# #
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# Copyright (C) 2018-2022 Maxim Devaev <mdevaev@gmail.com> #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program 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 General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <https://www.gnu.org/licenses/>. #
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# #
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*****************************************************************************/
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#pragma once
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#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <linux/videodev2.h>
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#include "tools.h"
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typedef struct {
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uint8_t *data;
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size_t used;
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size_t allocated;
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int dma_fd;
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unsigned width;
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unsigned height;
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unsigned format;
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unsigned stride;
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// Stride is a bytesperline in V4L2
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// https://www.kernel.org/doc/html/v4.14/media/uapi/v4l/pixfmt-v4l2.html
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// https://medium.com/@oleg.shipitko/what-does-stride-mean-in-image-processing-bba158a72bcd
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bool online;
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bool key;
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long double grab_ts;
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long double encode_begin_ts;
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long double encode_end_ts;
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} frame_s;
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#define FRAME_COPY_META(_src, _dest) { \
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_dest->width = _src->width; \
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_dest->height = _src->height; \
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_dest->format = _src->format; \
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_dest->stride = _src->stride; \
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_dest->online = _src->online; \
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_dest->key = _src->key; \
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_dest->grab_ts = _src->grab_ts; \
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_dest->encode_begin_ts = _src->encode_begin_ts; \
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_dest->encode_end_ts = _src->encode_end_ts; \
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}
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static inline void frame_copy_meta(const frame_s *src, frame_s *dest) {
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FRAME_COPY_META(src, dest);
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}
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#define FRAME_COMPARE_META_USED_NOTS(_a, _b) ( \
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_a->used == _b->used \
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&& _a->width == _b->width \
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&& _a->height == _b->height \
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&& _a->format == _b->format \
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&& _a->stride == _b->stride \
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&& _a->online == _b->online \
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&& _a->key == _b->key \
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)
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static inline void frame_encoding_begin(const frame_s *src, frame_s *dest, unsigned format) {
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assert(src->used > 0);
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frame_copy_meta(src, dest);
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dest->encode_begin_ts = get_now_monotonic();
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dest->format = format;
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dest->stride = 0;
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dest->used = 0;
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}
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static inline void frame_encoding_end(frame_s *dest) {
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assert(dest->used > 0);
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dest->encode_end_ts = get_now_monotonic();
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}
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frame_s *frame_init(void);
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void frame_destroy(frame_s *frame);
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void frame_realloc_data(frame_s *frame, size_t size);
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void frame_set_data(frame_s *frame, const uint8_t *data, size_t size);
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void frame_append_data(frame_s *frame, const uint8_t *data, size_t size);
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void frame_copy(const frame_s *src, frame_s *dest);
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bool frame_compare(const frame_s *a, const frame_s *b);
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unsigned frame_get_padding(const frame_s *frame);
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const char *fourcc_to_string(unsigned format, char *buf, size_t size);
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static inline bool is_jpeg(unsigned format) {
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return (format == V4L2_PIX_FMT_JPEG || format == V4L2_PIX_FMT_MJPEG);
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}
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