/*
* Copyright (C) Texas Instruments - http://www.ti.com/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file Encoder_libjpeg.cpp
*
* This file encodes a YUV422I buffer to a jpeg
* TODO(XXX): Need to support formats other than yuv422i
* Change interface to pre/post-proc algo framework
*
*/
#define LOG_TAG "CameraHAL"
#include "CameraHal.h"
#include "Encoder_libjpeg.h"
#include "NV12_resize.h"
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <errno.h>
#include <math.h>
extern "C" {
#include "jpeglib.h"
#include "jerror.h"
}
#define ARRAY_SIZE(array) (sizeof((array)) / sizeof((array)[0]))
#define MIN(x,y) ((x < y) ? x : y)
namespace android {
struct integer_string_pair {
unsigned int integer;
const char* string;
};
static integer_string_pair degress_to_exif_lut [] = {
// degrees, exif_orientation
{0, "1"},
{90, "6"},
{180, "3"},
{270, "8"},
};
struct libjpeg_destination_mgr : jpeg_destination_mgr {
libjpeg_destination_mgr(uint8_t* input, int size);
uint8_t* buf;
int bufsize;
size_t jpegsize;
};
static void libjpeg_init_destination (j_compress_ptr cinfo) {
libjpeg_destination_mgr* dest = (libjpeg_destination_mgr*)cinfo->dest;
dest->next_output_byte = dest->buf;
dest->free_in_buffer = dest->bufsize;
dest->jpegsize = 0;
}
static boolean libjpeg_empty_output_buffer(j_compress_ptr cinfo) {
libjpeg_destination_mgr* dest = (libjpeg_destination_mgr*)cinfo->dest;
dest->next_output_byte = dest->buf;
dest->free_in_buffer = dest->bufsize;
return TRUE; // ?
}
static void libjpeg_term_destination (j_compress_ptr cinfo) {
libjpeg_destination_mgr* dest = (libjpeg_destination_mgr*)cinfo->dest;
dest->jpegsize = dest->bufsize - dest->free_in_buffer;
}
libjpeg_destination_mgr::libjpeg_destination_mgr(uint8_t* input, int size) {
this->init_destination = libjpeg_init_destination;
this->empty_output_buffer = libjpeg_empty_output_buffer;
this->term_destination = libjpeg_term_destination;
this->buf = input;
this->bufsize = size;
jpegsize = 0;
}
/* private static functions */
static void nv21_to_yuv(uint8_t* dst, uint8_t* y, uint8_t* uv, int width) {
if (!dst || !y || !uv) {
return;
}
while ((width--) > 0) {
uint8_t y0 = y[0];
uint8_t v0 = uv[0];
uint8_t u0 = *(uv+1);
dst[0] = y0;
dst[1] = u0;
dst[2] = v0;
dst += 3;
y++;
if(!(width % 2)) uv+=2;
}
}
static void uyvy_to_yuv(uint8_t* dst, uint32_t* src, int width) {
if (!dst || !src) {
return;
}
if (width % 2) {
return; // not supporting odd widths
}
// currently, neon routine only supports multiple of 16 width
if (width % 16) {
while ((width-=2) >= 0) {
uint8_t u0 = (src[0] >> 0) & 0xFF;
uint8_t y0 = (src[0] >> 8) & 0xFF;
uint8_t v0 = (src[0] >> 16) & 0xFF;
uint8_t y1 = (src[0] >> 24) & 0xFF;
dst[0] = y0;
dst[1] = u0;
dst[2] = v0;
dst[3] = y1;
dst[4] = u0;
dst[5] = v0;
dst += 6;
src++;
}
} else {
int n = width;
asm volatile (
" pld [%[src], %[src_stride], lsl #2] \n\t"
" cmp %[n], #16 \n\t"
" blt 5f \n\t"
"0: @ 16 pixel swap \n\t"
" vld2.8 {q0, q1} , [%[src]]! @ q0 = uv q1 = y \n\t"
" vuzp.8 q0, q2 @ d1 = u d5 = v \n\t"
" vmov d1, d0 @ q0 = u0u1u2..u0u1u2... \n\t"
" vmov d5, d4 @ q2 = v0v1v2..v0v1v2... \n\t"
" vzip.8 d0, d1 @ q0 = u0u0u1u1u2u2... \n\t"
" vzip.8 d4, d5 @ q2 = v0v0v1v1v2v2... \n\t"
" vswp q0, q1 @ now q0 = y q1 = u q2 = v \n\t"
" vst3.8 {d0,d2,d4},[%[dst]]! \n\t"
" vst3.8 {d1,d3,d5},[%[dst]]! \n\t"
" sub %[n], %[n], #16 \n\t"
" cmp %[n], #16 \n\t"
" bge 0b \n\t"
"5: @ end \n\t"
#ifdef NEEDS_ARM_ERRATA_754319_754320
" vmov s0,s0 @ add noop for errata item \n\t"
#endif
: [dst] "+r" (dst), [src] "+r" (src), [n] "+r" (n)
: [src_stride] "r" (width)
: "cc", "memory", "q0", "q1", "q2"
);
}
}
static void resize_nv12(Encoder_libjpeg::params* params, uint8_t* dst_buffer) {
structConvImage o_img_ptr, i_img_ptr;
if (!params || !dst_buffer) {
return;
}
//input
i_img_ptr.uWidth = params->in_width;
i_img_ptr.uStride = i_img_ptr.uWidth;
i_img_ptr.uHeight = params->in_height;
i_img_ptr.eFormat = IC_FORMAT_YCbCr420_lp;
i_img_ptr.imgPtr = (uint8_t*) params->src;
i_img_ptr.clrPtr = i_img_ptr.imgPtr + (i_img_ptr.uWidth * i_img_ptr.uHeight);
//ouput
o_img_ptr.uWidth = params->out_width;
o_img_ptr.uStride = o_img_ptr.uWidth;
o_img_ptr.uHeight = params->out_height;
o_img_ptr.eFormat = IC_FORMAT_YCbCr420_lp;
o_img_ptr.imgPtr = dst_buffer;
o_img_ptr.clrPtr = o_img_ptr.imgPtr + (o_img_ptr.uWidth * o_img_ptr.uHeight);
VT_resizeFrame_Video_opt2_lp(&i_img_ptr, &o_img_ptr, NULL, 0);
}
/* public static functions */
const char* ExifElementsTable::degreesToExifOrientation(unsigned int degrees) {
for (unsigned int i = 0; i < ARRAY_SIZE(degress_to_exif_lut); i++) {
if (degrees == degress_to_exif_lut[i].integer) {
return degress_to_exif_lut[i].string;
}
}
return NULL;
}
void ExifElementsTable::stringToRational(const char* str, unsigned int* num, unsigned int* den) {
int len;
char * tempVal = NULL;
if (str != NULL) {
len = strlen(str);
tempVal = (char*) malloc( sizeof(char) * (len + 1));
}
if (tempVal != NULL) {
// convert the decimal string into a rational
size_t den_len;
char *ctx;
unsigned int numerator = 0;
unsigned int denominator = 0;
char* temp = NULL;
memset(tempVal, '\0', len + 1);
strncpy(tempVal, str, len);
temp = strtok_r(tempVal, ".", &ctx);
if (temp != NULL)
numerator = atoi(temp);
if (!numerator)
numerator = 1;
temp = strtok_r(NULL, ".", &ctx);
if (temp != NULL) {
den_len = strlen(temp);
if(HUGE_VAL == den_len ) {
den_len = 0;
}
denominator = static_cast<unsigned int>(pow(10, den_len));
numerator = numerator * denominator + atoi(temp);
} else {
denominator = 1;
}
free(tempVal);
*num = numerator;
*den = denominator;
}
}
bool ExifElementsTable::isAsciiTag(const char* tag) {
// TODO(XXX): Add tags as necessary
return (strcmp(tag, TAG_GPS_PROCESSING_METHOD) == 0);
}
void ExifElementsTable::insertExifToJpeg(unsigned char* jpeg, size_t jpeg_size) {
ReadMode_t read_mode = (ReadMode_t)(READ_METADATA | READ_IMAGE);
ResetJpgfile();
if (ReadJpegSectionsFromBuffer(jpeg, jpeg_size, read_mode)) {
jpeg_opened = true;
create_EXIF(table, exif_tag_count, gps_tag_count, has_datetime_tag);
}
}
status_t ExifElementsTable::insertExifThumbnailImage(const char* thumb, int len) {
status_t ret = NO_ERROR;
if ((len > 0) && jpeg_opened) {
ret = ReplaceThumbnailFromBuffer(thumb, len);
CAMHAL_LOGDB("insertExifThumbnailImage. ReplaceThumbnail(). ret=%d", ret);
}
return ret;
}
void ExifElementsTable::saveJpeg(unsigned char* jpeg, size_t jpeg_size) {
if (jpeg_opened) {
WriteJpegToBuffer(jpeg, jpeg_size);
DiscardData();
jpeg_opened = false;
}
}
/* public functions */
ExifElementsTable::~ExifElementsTable() {
int num_elements = gps_tag_count + exif_tag_count;
for (int i = 0; i < num_elements; i++) {
if (table[i].Value) {
free(table[i].Value);
}
}
if (jpeg_opened) {
DiscardData();
}
}
status_t ExifElementsTable::insertElement(const char* tag, const char* value) {
unsigned int value_length = 0;
status_t ret = NO_ERROR;
if (!value || !tag) {
return -EINVAL;
}
if (position >= MAX_EXIF_TAGS_SUPPORTED) {
CAMHAL_LOGEA("Max number of EXIF elements already inserted");
return NO_MEMORY;
}
if (isAsciiTag(tag)) {
value_length = sizeof(ExifAsciiPrefix) + strlen(value + sizeof(ExifAsciiPrefix));
} else {
value_length = strlen(value);
}
if (IsGpsTag(tag)) {
table[position].GpsTag = TRUE;
table[position].Tag = GpsTagNameToValue(tag);
gps_tag_count++;
} else {
table[position].GpsTag = FALSE;
table[position].Tag = TagNameToValue(tag);
exif_tag_count++;
if (strcmp(tag, TAG_DATETIME) == 0) {
has_datetime_tag = true;
}
}
table[position].DataLength = 0;
table[position].Value = (char*) malloc(sizeof(char) * (value_length + 1));
if (table[position].Value) {
memcpy(table[position].Value, value, value_length + 1);
table[position].DataLength = value_length + 1;
}
position++;
return ret;
}
/* private member functions */
size_t Encoder_libjpeg::encode(params* input) {
jpeg_compress_struct cinfo;
jpeg_error_mgr jerr;
jpeg_destination_mgr jdest;
uint8_t* src = NULL, *resize_src = NULL;
uint8_t* row_tmp = NULL;
uint8_t* row_src = NULL;
uint8_t* row_uv = NULL; // used only for NV12
int out_width = 0, in_width = 0;
int out_height = 0, in_height = 0;
int bpp = 2; // for uyvy
int right_crop = 0, start_offset = 0;
if (!input) {
return 0;
}
out_width = input->out_width;
in_width = input->in_width;
out_height = input->out_height;
in_height = input->in_height;
right_crop = input->right_crop;
start_offset = input->start_offset;
src = input->src;
input->jpeg_size = 0;
libjpeg_destination_mgr dest_mgr(input->dst, input->dst_size);
// param check...
if ((in_width < 2) || (out_width < 2) || (in_height < 2) || (out_height < 2) ||
(src == NULL) || (input->dst == NULL) || (input->quality < 1) || (input->src_size < 1) ||
(input->dst_size < 1) || (input->format == NULL)) {
goto exit;
}
if (strcmp(input->format, CameraParameters::PIXEL_FORMAT_YUV420SP) == 0) {
bpp = 1;
if ((in_width != out_width) || (in_height != out_height)) {
resize_src = (uint8_t*) malloc(input->dst_size);
resize_nv12(input, resize_src);
if (resize_src) src = resize_src;
}
} else if ((in_width != out_width) || (in_height != out_height)) {
CAMHAL_LOGEB("Encoder: resizing is not supported for this format: %s", input->format);
goto exit;
} else if (strcmp(input->format, CameraParameters::PIXEL_FORMAT_YUV422I)) {
// we currently only support yuv422i and yuv420sp
CAMHAL_LOGEB("Encoder: format not supported: %s", input->format);
goto exit;
}
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
CAMHAL_LOGDB("encoding... \n\t"
"width: %d \n\t"
"height:%d \n\t"
"dest %p \n\t"
"dest size:%d \n\t"
"mSrc %p",
out_width, out_height, input->dst,
input->dst_size, src);
cinfo.dest = &dest_mgr;
cinfo.image_width = out_width - right_crop;
cinfo.image_height = out_height;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_YCbCr;
cinfo.input_gamma = 1;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, input->quality, TRUE);
cinfo.dct_method = JDCT_IFAST;
jpeg_start_compress(&cinfo, TRUE);
row_tmp = (uint8_t*)malloc(out_width * 3);
row_src = src + start_offset;
row_uv = src + out_width * out_height * bpp;
while ((cinfo.next_scanline < cinfo.image_height) && !mCancelEncoding) {
JSAMPROW row[1]; /* pointer to JSAMPLE row[s] */
// convert input yuv format to yuv444
if (strcmp(input->format, CameraParameters::PIXEL_FORMAT_YUV420SP) == 0) {
nv21_to_yuv(row_tmp, row_src, row_uv, out_width - right_crop);
} else {
uyvy_to_yuv(row_tmp, (uint32_t*)row_src, out_width - right_crop);
}
row[0] = row_tmp;
jpeg_write_scanlines(&cinfo, row, 1);
row_src = row_src + out_width*bpp;
// move uv row if input format needs it
if (strcmp(input->format, CameraParameters::PIXEL_FORMAT_YUV420SP) == 0) {
if (!(cinfo.next_scanline % 2))
row_uv = row_uv + out_width * bpp;
}
}
// no need to finish encoding routine if we are prematurely stopping
// we will end up crashing in dest_mgr since data is incomplete
if (!mCancelEncoding)
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
if (resize_src) free(resize_src);
if (row_tmp) free(row_tmp);
exit:
input->jpeg_size = dest_mgr.jpegsize;
return dest_mgr.jpegsize;
}
} // namespace android