mjpeg.c

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/*
 *
 * This is external code. Converts between avi and mpeg/jpeg.
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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 2
 * 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 *
 */

#include "AVI_avi.h"
#include <stdlib.h>
#include <string.h>
#include "jpeglib.h"
#include "jerror.h"
#include "MEM_guardedalloc.h"

#include "mjpeg.h"

#define PADUP(num, amt) ((num+(amt-1))&~(amt-1))

static void jpegmemdestmgr_build (j_compress_ptr cinfo, unsigned char *buffer, int bufsize);
static void jpegmemsrcmgr_build (j_decompress_ptr dinfo, unsigned char *buffer, int bufsize);

static int numbytes;

static void add_huff_table (j_decompress_ptr dinfo, JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
{
    if (*htblptr == NULL)
        *htblptr = jpeg_alloc_huff_table((j_common_ptr) dinfo);

    memcpy((*htblptr)->bits, bits, sizeof((*htblptr)->bits));
    memcpy((*htblptr)->huffval, val, sizeof((*htblptr)->huffval));

    /* Initialize sent_table FALSE so table will be written to JPEG file. */
    (*htblptr)->sent_table = FALSE;
}

/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
/* IMPORTANT: these are only valid for 8-bit data precision! */

static void std_huff_tables (j_decompress_ptr dinfo)
{
    static const UINT8 bits_dc_luminance[17] =
    { /* 0-base */
        0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0   };
    static const UINT8 val_dc_luminance[] =
    { 
        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11    };

    static const UINT8 bits_dc_chrominance[17] =
    { /* 0-base */
        0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0   };
    static const UINT8 val_dc_chrominance[] =
    { 
        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11    };

    static const UINT8 bits_ac_luminance[17] =
    { /* 0-base */
        0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d    };
    static const UINT8 val_ac_luminance[] =
    { 
        0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
        0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
        0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
        0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
        0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
        0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
        0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
        0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
        0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
        0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
        0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
        0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
        0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
        0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
        0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
        0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
        0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
        0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
        0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
        0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
        0xf9, 0xfa  };
    static const UINT8 bits_ac_chrominance[17] =
    { /* 0-base */
        0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77    };
    static const UINT8 val_ac_chrominance[] =
    { 
        0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
        0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
        0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
        0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
        0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
        0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
        0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
        0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
        0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
        0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
        0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
        0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
        0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
        0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
        0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
        0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
        0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
        0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
        0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
        0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
        0xf9, 0xfa  };

    add_huff_table(dinfo, &dinfo->dc_huff_tbl_ptrs[0],
        bits_dc_luminance, val_dc_luminance);
    add_huff_table(dinfo, &dinfo->ac_huff_tbl_ptrs[0],
        bits_ac_luminance, val_ac_luminance);
    add_huff_table(dinfo, &dinfo->dc_huff_tbl_ptrs[1],
        bits_dc_chrominance, val_dc_chrominance);
    add_huff_table(dinfo, &dinfo->ac_huff_tbl_ptrs[1],
        bits_ac_chrominance, val_ac_chrominance);
}

static int Decode_JPEG(unsigned char *inBuffer, unsigned char *outBuffer, unsigned int width, unsigned int height, int bufsize)
{
    int rowstride;
    unsigned int y;
    struct jpeg_decompress_struct dinfo;
    struct jpeg_error_mgr jerr;
    
    (void)width; /* unused */

    numbytes= 0;

    dinfo.err = jpeg_std_error(&jerr);
    jpeg_create_decompress(&dinfo);
    jpegmemsrcmgr_build(&dinfo, inBuffer, bufsize);
    jpeg_read_header(&dinfo, TRUE);
    if (dinfo.dc_huff_tbl_ptrs[0] == NULL){
        std_huff_tables(&dinfo);
    }
    dinfo.out_color_space = JCS_RGB;
    dinfo.dct_method = JDCT_IFAST;

    jpeg_start_decompress(&dinfo);

    rowstride= dinfo.output_width*dinfo.output_components;
    for (y= 0; y<dinfo.output_height; y++) {
        jpeg_read_scanlines(&dinfo, (JSAMPARRAY) &outBuffer, 1);
        outBuffer += rowstride;
    }
    jpeg_finish_decompress(&dinfo);

    if (dinfo.output_height >= height) return 0;
    
    inBuffer+= numbytes;
    jpegmemsrcmgr_build(&dinfo, inBuffer, bufsize-numbytes);

    numbytes= 0;
    jpeg_read_header(&dinfo, TRUE);
    if (dinfo.dc_huff_tbl_ptrs[0] == NULL){
        std_huff_tables(&dinfo);
    }

    jpeg_start_decompress(&dinfo);
    rowstride= dinfo.output_width*dinfo.output_components;
    for (y= 0; y<dinfo.output_height; y++){
        jpeg_read_scanlines(&dinfo, (JSAMPARRAY) &outBuffer, 1);
        outBuffer += rowstride;
    }
    jpeg_finish_decompress(&dinfo);
    jpeg_destroy_decompress(&dinfo);
    
    return 1;
}

static void Compress_JPEG(int quality, unsigned char *outbuffer, unsigned char *inBuffer, int width, int height, int bufsize)
{
    int i, rowstride;
    unsigned int y;
    struct jpeg_compress_struct cinfo;
    struct jpeg_error_mgr jerr;
    unsigned char marker[60];

    cinfo.err = jpeg_std_error(&jerr);
    jpeg_create_compress(&cinfo);
    jpegmemdestmgr_build(&cinfo, outbuffer, bufsize);

    cinfo.image_width = width;
    cinfo.image_height = height;
    cinfo.input_components = 3;
    cinfo.in_color_space = JCS_RGB;

    jpeg_set_defaults(&cinfo);
    jpeg_set_colorspace (&cinfo, JCS_YCbCr);
        
    jpeg_set_quality (&cinfo, quality, TRUE);

    cinfo.dc_huff_tbl_ptrs[0]->sent_table = TRUE;
    cinfo.dc_huff_tbl_ptrs[1]->sent_table = TRUE;
    cinfo.ac_huff_tbl_ptrs[0]->sent_table = TRUE;
    cinfo.ac_huff_tbl_ptrs[1]->sent_table = TRUE;

    cinfo.comp_info[0].component_id = 0;
    cinfo.comp_info[0].v_samp_factor = 1;
    cinfo.comp_info[1].component_id = 1;
    cinfo.comp_info[2].component_id = 2;

    cinfo.write_JFIF_header = FALSE;

    jpeg_start_compress(&cinfo, FALSE);

    i=0;
    marker[i++] = 'A';
    marker[i++] = 'V';
    marker[i++] = 'I';
    marker[i++] = '1';
    marker[i++] = 0;
    while (i<60)
        marker[i++] = 32;

    jpeg_write_marker (&cinfo, JPEG_APP0, marker, 60);

    i=0;
    while (i<60)
        marker[i++] = 0;

    jpeg_write_marker (&cinfo, JPEG_COM, marker, 60);

    rowstride= cinfo.image_width*cinfo.input_components;
    for (y = 0; y < cinfo.image_height; y++){
        jpeg_write_scanlines(&cinfo, (JSAMPARRAY) &inBuffer, 1);
        inBuffer += rowstride;
    }
    jpeg_finish_compress(&cinfo);
    jpeg_destroy_compress(&cinfo);
}

static void interlace(unsigned char *to, unsigned char *from, int width, int height)
{
    int i, rowstride= width*3;
    
    for (i=0; i<height; i++) {
        if (i&1)
            memcpy (&to[i*rowstride], &from[(i/2 + height/2)*rowstride], rowstride);
        else 
            memcpy (&to[i*rowstride], &from[(i/2)*rowstride], rowstride);
    }
}

static void deinterlace(int odd, unsigned char *to, unsigned char *from, int width, int height)
{
    int i, rowstride= width*3;
    
    for (i=0; i<height; i++) {
        if ((i&1)==odd)
            memcpy (&to[(i/2 + height/2)*rowstride], &from[i*rowstride], rowstride);
        else 
            memcpy (&to[(i/2)*rowstride], &from[i*rowstride], rowstride);
    }
}

static int check_and_decode_jpeg(unsigned char *inbuf, unsigned char *outbuf, int width, int height, int bufsize)
{
        /* JPEG's are always multiples of 16, extra is cropped out AVI's */ 
    if ((width&0xF) || (height&0xF)) {
        int i, rrowstride, jrowstride;
        int jwidth= PADUP(width, 16);
        int jheight= PADUP(height, 16);
        unsigned char *tmpbuf= MEM_mallocN(jwidth*jheight*3, "avi.check_and_decode_jpeg");
        int ret= Decode_JPEG(inbuf, tmpbuf, jwidth, jheight, bufsize);
        
            /* crop the tmpbuf into the real buffer */
        rrowstride= width*3;
        jrowstride= jwidth*3;
        for (i=0; i<height; i++)
            memcpy(&outbuf[i*rrowstride], &tmpbuf[i*jrowstride], rrowstride);
        MEM_freeN(tmpbuf);
        
        return ret;
    } else {
        return Decode_JPEG(inbuf, outbuf, width, height, bufsize);
    }
}

static void check_and_compress_jpeg(int quality, unsigned char *outbuf, unsigned char *inbuf, int width, int height, int bufsize)
{
        /* JPEG's are always multiples of 16, extra is ignored in AVI's */  
    if ((width&0xF) || (height&0xF)) {
        int i, rrowstride, jrowstride;
        int jwidth= PADUP(width, 16);
        int jheight= PADUP(height, 16);
        unsigned char *tmpbuf= MEM_mallocN(jwidth*jheight*3, "avi.check_and_compress_jpeg");
        
            /* resize the realbuf into the tmpbuf */
        rrowstride= width*3;
        jrowstride= jwidth*3;
        for (i=0; i<jheight; i++) {
            if (i<height)
                memcpy(&tmpbuf[i*jrowstride], &inbuf[i*rrowstride], rrowstride);
            else
                memset(&tmpbuf[i*jrowstride], 0, rrowstride);
            memset(&tmpbuf[i*jrowstride+rrowstride], 0, jrowstride-rrowstride);
        }

        Compress_JPEG(quality, outbuf, tmpbuf, jwidth, jheight, bufsize);

        MEM_freeN(tmpbuf);
    } else {
        Compress_JPEG(quality, outbuf, inbuf, width, height, bufsize);
    }
}

void *avi_converter_from_mjpeg (AviMovie *movie, int stream, unsigned char *buffer, int *size)
{
    int deint;
    unsigned char *buf;

    (void)stream; /* unused */

    buf= MEM_mallocN (movie->header->Height * movie->header->Width * 3, "avi.avi_converter_from_mjpeg 1");

    deint= check_and_decode_jpeg(buffer, buf, movie->header->Width, movie->header->Height, *size);
    
    MEM_freeN(buffer);
    
    if (deint) {
        buffer = MEM_mallocN (movie->header->Height * movie->header->Width * 3, "avi.avi_converter_from_mjpeg 2");
        interlace (buffer, buf, movie->header->Width, movie->header->Height);
        MEM_freeN (buf);
    
        buf= buffer;
    }
        
    return buf;
}

void *avi_converter_to_mjpeg (AviMovie *movie, int stream, unsigned char *buffer, int *size)
{
    unsigned char *buf;
    int bufsize= *size;
    
    numbytes = 0;
    *size= 0;

    buf = MEM_mallocN (movie->header->Height * movie->header->Width * 3, "avi.avi_converter_to_mjpeg 1");   
    if (!movie->interlace) {
        check_and_compress_jpeg(movie->streams[stream].sh.Quality/100, buf, buffer,  movie->header->Width, movie->header->Height, bufsize);
    } else {
        deinterlace (movie->odd_fields, buf, buffer, movie->header->Width, movie->header->Height);
        MEM_freeN (buffer);
    
        buffer= buf;
        buf= MEM_mallocN (movie->header->Height * movie->header->Width * 3, "avi.avi_converter_to_mjpeg 2");
    
        check_and_compress_jpeg(movie->streams[stream].sh.Quality/100, buf, buffer,  movie->header->Width, movie->header->Height/2, bufsize/2);
        *size+= numbytes;
        numbytes=0;
        check_and_compress_jpeg(movie->streams[stream].sh.Quality/100, buf+*size, buffer+(movie->header->Height/2)*movie->header->Width*3,  movie->header->Width, movie->header->Height/2, bufsize/2);
    }
    *size += numbytes;  

    MEM_freeN (buffer);
    return buf;
}


/* Compression from memory */

static void jpegmemdestmgr_init_destination(j_compress_ptr cinfo)
{
    (void)cinfo; /* unused */
}

static boolean jpegmemdestmgr_empty_output_buffer(j_compress_ptr cinfo)
{
    (void)cinfo; /* unused */
    return TRUE;
}

static void jpegmemdestmgr_term_destination(j_compress_ptr cinfo)
{
    numbytes-= cinfo->dest->free_in_buffer;

    MEM_freeN(cinfo->dest);
}

static void jpegmemdestmgr_build(j_compress_ptr cinfo, unsigned char *buffer, int bufsize)
{
    cinfo->dest= MEM_mallocN(sizeof(*(cinfo->dest)), "avi.jpegmemdestmgr_build");
    
    cinfo->dest->init_destination= jpegmemdestmgr_init_destination;
    cinfo->dest->empty_output_buffer= jpegmemdestmgr_empty_output_buffer;
    cinfo->dest->term_destination= jpegmemdestmgr_term_destination;

    cinfo->dest->next_output_byte= buffer;
    cinfo->dest->free_in_buffer= bufsize;
    
    numbytes= bufsize;
}

/* Decompression from memory */

static void jpegmemsrcmgr_init_source(j_decompress_ptr dinfo)
{
    (void)dinfo;
}

static boolean jpegmemsrcmgr_fill_input_buffer(j_decompress_ptr dinfo)
{
    unsigned char *buf= (unsigned char*) dinfo->src->next_input_byte-2;
    
        /* if we get called, must have run out of data */
    WARNMS(dinfo, JWRN_JPEG_EOF);
    
    buf[0]= (JOCTET) 0xFF;
    buf[1]= (JOCTET) JPEG_EOI;
    
    dinfo->src->next_input_byte= buf;
    dinfo->src->bytes_in_buffer= 2;
    
    return TRUE;
}

static void jpegmemsrcmgr_skip_input_data(j_decompress_ptr dinfo, long skipcnt)
{
    if (dinfo->src->bytes_in_buffer<skipcnt)
        skipcnt= dinfo->src->bytes_in_buffer;

    dinfo->src->next_input_byte+= skipcnt;
    dinfo->src->bytes_in_buffer-= skipcnt;
}

static void jpegmemsrcmgr_term_source(j_decompress_ptr dinfo)
{
    numbytes-= dinfo->src->bytes_in_buffer;
    
    MEM_freeN(dinfo->src);
}

static void jpegmemsrcmgr_build(j_decompress_ptr dinfo, unsigned char *buffer, int bufsize)
{
    dinfo->src= MEM_mallocN(sizeof(*(dinfo->src)), "avi.jpegmemsrcmgr_build");
    
    dinfo->src->init_source= jpegmemsrcmgr_init_source;
    dinfo->src->fill_input_buffer= jpegmemsrcmgr_fill_input_buffer;
    dinfo->src->skip_input_data= jpegmemsrcmgr_skip_input_data;
    dinfo->src->resync_to_restart= jpeg_resync_to_restart;
    dinfo->src->term_source= jpegmemsrcmgr_term_source;
    
    dinfo->src->bytes_in_buffer= bufsize;
    dinfo->src->next_input_byte= buffer;

    numbytes= bufsize;
}