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refactoring

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Devaev Maxim
2019-03-04 15:42:47 +03:00
parent b2ca0ea998
commit 4492cc1efe
4 changed files with 12 additions and 12 deletions
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299
src/encoders/cpu/encoder.c Normal file
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/*****************************************************************************
# #
# uStreamer - Lightweight and fast MJPG-HTTP streamer. #
# #
# This source file based on code of MJPG-Streamer. #
# #
# Copyright (C) 2005-2006 Laurent Pinchart & Michel Xhaard #
# Copyright (C) 2006 Gabriel A. Devenyi #
# Copyright (C) 2007 Tom Stöveken #
# Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <jpeglib.h>
#include <linux/videodev2.h>
#include "../../tools.h"
#include "../../device.h"
#include "encoder.h"
struct _jpeg_dest_manager_t {
struct jpeg_destination_mgr mgr; // Default manager
JOCTET *buffer; // Start of buffer
unsigned char *outbuffer_cursor;
unsigned long *written;
};
static void _jpeg_set_dest_picture(j_compress_ptr jpeg, unsigned char *picture, unsigned long *written);
static void _jpeg_write_scanlines_yuyv(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height);
static void _jpeg_write_scanlines_uyvy(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height);
static void _jpeg_write_scanlines_rgb565(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height);
static void _jpeg_write_scanlines_rgb24(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height);
static void _jpeg_init_destination(j_compress_ptr jpeg);
static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg);
static void _jpeg_term_destination(j_compress_ptr jpeg);
void cpu_encoder_compress_buffer(struct device_t *dev, unsigned index, unsigned quality) {
// This function based on compress_image_to_jpeg() from mjpg-streamer
struct jpeg_compress_struct jpeg;
struct jpeg_error_mgr jpeg_error;
jpeg.err = jpeg_std_error(&jpeg_error);
jpeg_create_compress(&jpeg);
dev->run->pictures[index].size = 0;
_jpeg_set_dest_picture(&jpeg, dev->run->pictures[index].data, &dev->run->pictures[index].size);
jpeg.image_width = dev->run->width;
jpeg.image_height = dev->run->height;
jpeg.input_components = 3;
jpeg.in_color_space = JCS_RGB;
jpeg_set_defaults(&jpeg);
jpeg_set_quality(&jpeg, quality, TRUE);
jpeg_start_compress(&jpeg, TRUE);
# define WRITE_SCANLINES(_format, _func) \
case _format: { _func(&jpeg, dev->run->hw_buffers[index].start, dev->run->width, dev->run->height); break; }
switch (dev->run->format) {
// https://www.fourcc.org/yuv.php
WRITE_SCANLINES(V4L2_PIX_FMT_YUYV, _jpeg_write_scanlines_yuyv);
WRITE_SCANLINES(V4L2_PIX_FMT_UYVY, _jpeg_write_scanlines_uyvy);
WRITE_SCANLINES(V4L2_PIX_FMT_RGB565, _jpeg_write_scanlines_rgb565);
WRITE_SCANLINES(V4L2_PIX_FMT_RGB24, _jpeg_write_scanlines_rgb24);
default: assert(0 && "Unsupported input format for CPU JPEG encoder");
}
# undef WRITE_SCANLINES
// TODO: process jpeg errors:
// https://stackoverflow.com/questions/19857766/error-handling-in-libjpeg
jpeg_finish_compress(&jpeg);
jpeg_destroy_compress(&jpeg);
assert(dev->run->pictures[index].size > 0);
assert(dev->run->pictures[index].size <= dev->run->max_picture_size);
}
static void _jpeg_set_dest_picture(j_compress_ptr jpeg, unsigned char *picture, unsigned long *written) {
struct _jpeg_dest_manager_t *dest;
if (jpeg->dest == NULL) {
assert((jpeg->dest = (struct jpeg_destination_mgr *)(*jpeg->mem->alloc_small)(
(j_common_ptr) jpeg, JPOOL_PERMANENT, sizeof(struct _jpeg_dest_manager_t)
)));
}
dest = (struct _jpeg_dest_manager_t *)jpeg->dest;
dest->mgr.init_destination = _jpeg_init_destination;
dest->mgr.empty_output_buffer = _jpeg_empty_output_buffer;
dest->mgr.term_destination = _jpeg_term_destination;
dest->outbuffer_cursor = picture;
dest->written = written;
}
#define NORM_COMPONENT(_x) (((_x) > 255) ? 255 : (((_x) < 0) ? 0 : (_x)))
static void _jpeg_write_scanlines_yuyv(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height) {
unsigned char *line_buffer;
JSAMPROW scanlines[1];
unsigned z = 0;
A_CALLOC(line_buffer, width * 3);
while (jpeg->next_scanline < height) {
unsigned char *ptr = line_buffer;
for (unsigned x = 0; x < width; ++x) {
int y = (!z ? data[0] << 8 : data[2] << 8);
int u = data[1] - 128;
int v = data[3] - 128;
int r = (y + (359 * v)) >> 8;
int g = (y - (88 * u) - (183 * v)) >> 8;
int b = (y + (454 * u)) >> 8;
*(ptr++) = NORM_COMPONENT(r);
*(ptr++) = NORM_COMPONENT(g);
*(ptr++) = NORM_COMPONENT(b);
if (z++) {
z = 0;
data += 4;
}
}
scanlines[0] = line_buffer;
jpeg_write_scanlines(jpeg, scanlines, 1);
}
free(line_buffer);
}
static void _jpeg_write_scanlines_uyvy(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height) {
unsigned char *line_buffer;
JSAMPROW scanlines[1];
unsigned z = 0;
A_CALLOC(line_buffer, width * 3);
while (jpeg->next_scanline < height) {
unsigned char *ptr = line_buffer;
for(unsigned x = 0; x < width; ++x) {
int y = (!z ? data[1] << 8 : data[3] << 8);
int u = data[0] - 128;
int v = data[2] - 128;
int r = (y + (359 * v)) >> 8;
int g = (y - (88 * u) - (183 * v)) >> 8;
int b = (y + (454 * u)) >> 8;
*(ptr++) = NORM_COMPONENT(r);
*(ptr++) = NORM_COMPONENT(g);
*(ptr++) = NORM_COMPONENT(b);
if (z++) {
z = 0;
data += 4;
}
}
scanlines[0] = line_buffer;
jpeg_write_scanlines(jpeg, scanlines, 1);
}
free(line_buffer);
}
#undef NORM_COMPONENT
static void _jpeg_write_scanlines_rgb565(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height) {
unsigned char *line_buffer;
JSAMPROW scanlines[1];
A_CALLOC(line_buffer, width * 3);
while (jpeg->next_scanline < height) {
unsigned char *ptr = line_buffer;
for(unsigned x = 0; x < width; ++x) {
unsigned int two_byte = (data[1] << 8) + data[0];
*(ptr++) = data[1] & 248;
*(ptr++) = (unsigned char)((two_byte & 2016) >> 3);
*(ptr++) = (data[0] & 31) * 8;
data += 2;
}
scanlines[0] = line_buffer;
jpeg_write_scanlines(jpeg, scanlines, 1);
}
free(line_buffer);
}
static void _jpeg_write_scanlines_rgb24(
struct jpeg_compress_struct *jpeg, const unsigned char *data,
unsigned width, unsigned height) {
JSAMPROW scanlines[1];
while (jpeg->next_scanline < height) {
scanlines[0] = (unsigned char *)(data + jpeg->next_scanline * width * 3);
jpeg_write_scanlines(jpeg, scanlines, 1);
}
}
#define JPEG_OUTPUT_BUFFER_SIZE 4096
static void _jpeg_init_destination(j_compress_ptr jpeg) {
struct _jpeg_dest_manager_t *dest = (struct _jpeg_dest_manager_t *)jpeg->dest;
// Allocate the output buffer - it will be released when done with image
assert((dest->buffer = (JOCTET *)(*jpeg->mem->alloc_small)(
(j_common_ptr) jpeg, JPOOL_IMAGE, JPEG_OUTPUT_BUFFER_SIZE * sizeof(JOCTET)
)));
dest->mgr.next_output_byte = dest->buffer;
dest->mgr.free_in_buffer = JPEG_OUTPUT_BUFFER_SIZE;
}
static boolean _jpeg_empty_output_buffer(j_compress_ptr jpeg) {
// Called whenever local jpeg buffer fills up
struct _jpeg_dest_manager_t *dest = (struct _jpeg_dest_manager_t *)jpeg->dest;
memcpy(dest->outbuffer_cursor, dest->buffer, JPEG_OUTPUT_BUFFER_SIZE);
dest->outbuffer_cursor += JPEG_OUTPUT_BUFFER_SIZE;
*dest->written += JPEG_OUTPUT_BUFFER_SIZE;
dest->mgr.next_output_byte = dest->buffer;
dest->mgr.free_in_buffer = JPEG_OUTPUT_BUFFER_SIZE;
return TRUE;
}
static void _jpeg_term_destination(j_compress_ptr jpeg) {
// Called by jpeg_finish_compress after all data has been written.
// Usually needs to flush buffer
struct _jpeg_dest_manager_t *dest = (struct _jpeg_dest_manager_t *)jpeg->dest;
size_t data_count = JPEG_OUTPUT_BUFFER_SIZE - dest->mgr.free_in_buffer;
// Write any data remaining in the buffer
memcpy(dest->outbuffer_cursor, dest->buffer, data_count);
dest->outbuffer_cursor += data_count;
*dest->written += data_count;
}
#undef JPEG_OUTPUT_BUFFER_SIZE

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src/encoders/cpu/encoder.h Normal file
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/*****************************************************************************
# #
# uStreamer - Lightweight and fast MJPG-HTTP streamer. #
# #
# Copyright (C) 2018 Maxim Devaev <mdevaev@gmail.com> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
*****************************************************************************/
#pragma once
#include "../../device.h"
void cpu_encoder_compress_buffer(struct device_t *dev, unsigned index, unsigned quality);