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242 lines
6.6 KiB
242 lines
6.6 KiB
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stddef.h>
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#include <string.h>
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#include "esp_attr.h"
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#include "soc/efuse_reg.h"
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#include "esp_heap_caps.h"
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#include "esp_camera.h"
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#include "img_converters.h"
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#include "jpge.h"
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#include "yuv.h"
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#include "esp_system.h"
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#if ESP_IDF_VERSION_MAJOR >= 4 // IDF 4+
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#if CONFIG_IDF_TARGET_ESP32 // ESP32/PICO-D4
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#include "esp32/spiram.h"
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#else
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#error Target CONFIG_IDF_TARGET is not supported
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#endif
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#else // ESP32 Before IDF 4.0
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#include "esp_spiram.h"
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#endif
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#if defined(ARDUINO_ARCH_ESP32) && defined(CONFIG_ARDUHAL_ESP_LOG)
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#include "esp32-hal-log.h"
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#define TAG ""
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#else
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#include "esp_log.h"
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static const char* TAG = "to_jpg";
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#endif
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static void *_malloc(size_t size)
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{
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void * res = malloc(size);
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if(res) {
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return res;
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}
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return heap_caps_malloc(size, MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
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}
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static IRAM_ATTR void convert_line_format(uint8_t * src, pixformat_t format, uint8_t * dst, size_t width, size_t in_channels, size_t line)
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{
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int i=0, o=0, l=0;
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if(format == PIXFORMAT_GRAYSCALE) {
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memcpy(dst, src + line * width, width);
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} else if(format == PIXFORMAT_RGB888) {
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l = width * 3;
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src += l * line;
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for(i=0; i<l; i+=3) {
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dst[o++] = src[i+2];
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dst[o++] = src[i+1];
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dst[o++] = src[i];
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}
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} else if(format == PIXFORMAT_RGB565) {
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l = width * 2;
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src += l * line;
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for(i=0; i<l; i+=2) {
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dst[o++] = src[i] & 0xF8;
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dst[o++] = (src[i] & 0x07) << 5 | (src[i+1] & 0xE0) >> 3;
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dst[o++] = (src[i+1] & 0x1F) << 3;
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}
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} else if(format == PIXFORMAT_YUV422) {
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uint8_t y0, y1, u, v;
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uint8_t r, g, b;
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l = width * 2;
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src += l * line;
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for(i=0; i<l; i+=4) {
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y0 = src[i];
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u = src[i+1];
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y1 = src[i+2];
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v = src[i+3];
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yuv2rgb(y0, u, v, &r, &g, &b);
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dst[o++] = r;
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dst[o++] = g;
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dst[o++] = b;
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yuv2rgb(y1, u, v, &r, &g, &b);
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dst[o++] = r;
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dst[o++] = g;
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dst[o++] = b;
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}
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}
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}
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bool convert_image(uint8_t *src, uint16_t width, uint16_t height, pixformat_t format, uint8_t quality, jpge::output_stream *dst_stream)
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{
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int num_channels = 3;
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jpge::subsampling_t subsampling = jpge::H2V2;
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if(format == PIXFORMAT_GRAYSCALE) {
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num_channels = 1;
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subsampling = jpge::Y_ONLY;
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}
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if(!quality) {
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quality = 1;
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} else if(quality > 100) {
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quality = 100;
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}
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jpge::params comp_params = jpge::params();
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comp_params.m_subsampling = subsampling;
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comp_params.m_quality = quality;
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jpge::jpeg_encoder dst_image;
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if (!dst_image.init(dst_stream, width, height, num_channels, comp_params)) {
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ESP_LOGE(TAG, "JPG encoder init failed");
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return false;
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}
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uint8_t* line = (uint8_t*)_malloc(width * num_channels);
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if(!line) {
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ESP_LOGE(TAG, "Scan line malloc failed");
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return false;
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}
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for (int i = 0; i < height; i++) {
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convert_line_format(src, format, line, width, num_channels, i);
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if (!dst_image.process_scanline(line)) {
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ESP_LOGE(TAG, "JPG process line %u failed", i);
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free(line);
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return false;
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}
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}
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free(line);
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if (!dst_image.process_scanline(NULL)) {
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ESP_LOGE(TAG, "JPG image finish failed");
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return false;
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}
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dst_image.deinit();
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return true;
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}
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class callback_stream : public jpge::output_stream {
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protected:
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jpg_out_cb ocb;
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void * oarg;
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size_t index;
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public:
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callback_stream(jpg_out_cb cb, void * arg) : ocb(cb), oarg(arg), index(0) { }
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virtual ~callback_stream() { }
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virtual bool put_buf(const void* data, int len)
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{
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index += ocb(oarg, index, data, len);
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return true;
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}
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virtual size_t get_size() const
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{
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return index;
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}
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};
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bool fmt2jpg_cb(uint8_t *src, size_t src_len, uint16_t width, uint16_t height, pixformat_t format, uint8_t quality, jpg_out_cb cb, void * arg)
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{
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callback_stream dst_stream(cb, arg);
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return convert_image(src, width, height, format, quality, &dst_stream);
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}
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bool frame2jpg_cb(camera_fb_t * fb, uint8_t quality, jpg_out_cb cb, void * arg)
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{
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return fmt2jpg_cb(fb->buf, fb->len, fb->width, fb->height, fb->format, quality, cb, arg);
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}
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class memory_stream : public jpge::output_stream {
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protected:
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uint8_t *out_buf;
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size_t max_len, index;
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public:
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memory_stream(void *pBuf, uint buf_size) : out_buf(static_cast<uint8_t*>(pBuf)), max_len(buf_size), index(0) { }
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virtual ~memory_stream() { }
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virtual bool put_buf(const void* pBuf, int len)
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{
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if (!pBuf) {
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//end of image
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return true;
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}
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if ((size_t)len > (max_len - index)) {
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ESP_LOGW(TAG, "JPG output overflow: %d bytes", len - (max_len - index));
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len = max_len - index;
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}
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if (len) {
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memcpy(out_buf + index, pBuf, len);
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index += len;
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}
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return true;
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}
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virtual size_t get_size() const
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{
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return index;
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}
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};
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bool fmt2jpg(uint8_t *src, size_t src_len, uint16_t width, uint16_t height, pixformat_t format, uint8_t quality, uint8_t ** out, size_t * out_len)
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{
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//todo: allocate proper buffer for holding JPEG data
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//this should be enough for CIF frame size
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int jpg_buf_len = 64*1024;
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uint8_t * jpg_buf = (uint8_t *)_malloc(jpg_buf_len);
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if(jpg_buf == NULL) {
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ESP_LOGE(TAG, "JPG buffer malloc failed");
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return false;
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}
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memory_stream dst_stream(jpg_buf, jpg_buf_len);
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if(!convert_image(src, width, height, format, quality, &dst_stream)) {
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free(jpg_buf);
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return false;
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}
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*out = jpg_buf;
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*out_len = dst_stream.get_size();
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return true;
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}
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bool frame2jpg(camera_fb_t * fb, uint8_t quality, uint8_t ** out, size_t * out_len)
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{
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return fmt2jpg(fb->buf, fb->len, fb->width, fb->height, fb->format, quality, out, out_len);
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}
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