diff --git a/libvo/jpeg_enc.c b/libvo/jpeg_enc.c new file mode 100644 index 0000000000..c5102f803b --- /dev/null +++ b/libvo/jpeg_enc.c @@ -0,0 +1,899 @@ +/* Straightforward (to be) optimized JPEG encoder for the YUV422 format + * based on mjpeg code from ffmpeg. + * + * Copyright (c) 2002, Rik Snel + * Parts from ffmpeg Copyright (c) 2000, 2001 Gerard Lantau + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * For an excellent introduction to the JPEG format, see: + * http://www.ece.purdue.edu/~bourman/grad-labs/lab8/pdf/lab.pdf + */ + + +/* stuff from libavcodec/common.h */ + +#include +#include +#include +#include "config.h" +#ifdef USE_FASTMEMCPY +#include "fastmemcpy.h" +#endif +#include "../mp_msg.h" +#include "../libavcodec/common.h" +#include "../libavcodec/dsputil.h" + + +static int height, width, fields, cheap_upsample, qscale, bw = 0, first = 1; + +/* from dsputils.c */ + +static DCTELEM **blck; + +extern void (*av_fdct)(DCTELEM *b); + +static UINT8 zr_zigzag_direct[64] = { + 0, 1, 8, 16, 9, 2, 3, 10, + 17, 24, 32, 25, 18, 11, 4, 5, + 12, 19, 26, 33, 40, 48, 41, 34, + 27, 20, 13, 6, 7, 14, 21, 28, + 35, 42, 49, 56, 57, 50, 43, 36, + 29, 22, 15, 23, 30, 37, 44, 51, + 58, 59, 52, 45, 38, 31, 39, 46, + 53, 60, 61, 54, 47, 55, 62, 63 +}; + +/* bit output */ + +static PutBitContext pb; + +/* from mpegvideo.c */ + +#define QMAT_SHIFT 25 +#define QMAT_SHIFT_MMX 19 + +static const unsigned short aanscales[64] = { + /* precomputed values scaled up by 14 bits */ + 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, + 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270, + 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906, + 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315, + 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520, + 12873, 17855, 16819, 15137, 12873, 10114, 6967, 3552, + 8867, 12299, 11585, 10426, 8867, 6967, 4799, 2446, + 4520, 6270, 5906, 5315, 4520, 3552, 2446, 1247 +}; + + +static unsigned int simple_mmx_permutation[64]={ + 0x00, 0x08, 0x01, 0x09, 0x04, 0x0C, 0x05, 0x0D, + 0x10, 0x18, 0x11, 0x19, 0x14, 0x1C, 0x15, 0x1D, + 0x02, 0x0A, 0x03, 0x0B, 0x06, 0x0E, 0x07, 0x0F, + 0x12, 0x1A, 0x13, 0x1B, 0x16, 0x1E, 0x17, 0x1F, + 0x20, 0x28, 0x21, 0x29, 0x24, 0x2C, 0x25, 0x2D, + 0x30, 0x38, 0x31, 0x39, 0x34, 0x3C, 0x35, 0x3D, + 0x22, 0x2A, 0x23, 0x2B, 0x26, 0x2E, 0x27, 0x2F, + 0x32, 0x3A, 0x33, 0x3B, 0x36, 0x3E, 0x37, 0x3F, +}; + +#if 0 +void block_permute(short int *block) +{ + int tmp1, tmp2, tmp3, tmp4, tmp5, tmp6; + int i; + + for(i=0;i<8;i++) { + tmp1 = block[1]; + tmp2 = block[2]; + tmp3 = block[3]; + tmp4 = block[4]; + tmp5 = block[5]; + tmp6 = block[6]; + block[1] = tmp2; + block[2] = tmp4; + block[3] = tmp6; + block[4] = tmp1; + block[5] = tmp3; + block[6] = tmp5; + block += 8; + } +} +#endif + +static int q_intra_matrix[64]; + +static int dct_quantize(DCTELEM *block, int n, + int qscale) +{ + int i, j, level, last_non_zero, q; + const int *qmat; + + av_fdct (block); + + /* we need this permutation so that we correct the IDCT + permutation. will be moved into DCT code */ + //block_permute(block); + + /*if (n < 4) + q = s->y_dc_scale; + else + q = s->c_dc_scale; + q = q << 3;*/ + q = 64; + /* note: block[0] is assumed to be positive */ + block[0] = (block[0] + (q >> 1)) / q; + i = 1; + last_non_zero = 0; + + qmat = q_intra_matrix; + for(;i<64;i++) { + j = zr_zigzag_direct[i]; + level = block[j]; + level = level * qmat[j]; + /* XXX: slight error for the low range. Test should be equivalent to + (level <= -(1 << (QMAT_SHIFT - 3)) || level >= (1 << + (QMAT_SHIFT - 3))) + */ + if (((level << (31 - (QMAT_SHIFT - 3))) >> (31 - (QMAT_SHIFT - 3))) != + level) { + level = level / (1 << (QMAT_SHIFT - 3)); + /* XXX: currently, this code is not optimal. the range should be: + mpeg1: -255..255 + mpeg2: -2048..2047 + h263: -128..127 + mpeg4: -2048..2047 + */ + if (level > 255) + level = 255; + else if (level < -255) + level = -255; + block[j] = level; + last_non_zero = i; + } else { + block[j] = 0; + } + + } + return last_non_zero; +} + +static int dct_quantize_mmx(DCTELEM *block, int n, int qscale) +{ + int i, j, level, last_non_zero, q; + const int *qmat; + DCTELEM *b = block; + + /*for (i = 0; i < 8; i++) { + printf("%i %i %i %i %i %i %i %i\n", b[8*i], b[8*i+1], b[8*i+2], + b[8*i+3], b[8*i+4], b[8*i+5], b[8*i+6], b[8*i+7]); + }*/ + av_fdct (block); + /*for (i = 0; i < 8; i++) { + printf("%i %i %i %i %i %i %i %i\n", b[8*i], b[8*i+1], b[8*i+2], + b[8*i+3], b[8*i+4], b[8*i+5], b[8*i+6], b[8*i+7]); + }*/ + + + /* we need this permutation so that we correct the IDCT + permutation. will be moved into DCT code */ + //block_permute(block); + + //if (n < 2) + q = 8; + /*else + q = 8;*/ + + /* note: block[0] is assumed to be positive */ + block[0] = (block[0] + (q >> 1)) / q; + i = 1; + last_non_zero = 0; + qmat = q_intra_matrix; + + for(;i<64;i++) { + j = zr_zigzag_direct[i]; + level = block[j]; + level = level * qmat[j]; + /* XXX: slight error for the low range. Test should be equivalent to + (level <= -(1 << (QMAT_SHIFT_MMX - 3)) || level >= (1 << + (QMAT_SHIFT_MMX - 3))) + */ + if (((level << (31 - (QMAT_SHIFT_MMX - 3))) >> (31 - (QMAT_SHIFT_MMX - 3))) != + level) { + level = level / (1 << (QMAT_SHIFT_MMX - 3)); + /* XXX: currently, this code is not optimal. the range should be: + mpeg1: -255..255 + mpeg2: -2048..2047 + h263: -128..127 + mpeg4: -2048..2047 + * jpeg: -1024..1023 11 bit */ + if (level > 1023) + level = 1023; + else if (level < -1024) + level = -1024; + block[j] = level; + last_non_zero = i; + } else { + block[j] = 0; + } + } + /*for (i = 0; i < 8; i++) { + printf("%i %i %i %i %i %i %i %i\n", b[8*i], b[8*i+1], b[8*i+2], + b[8*i+3], b[8*i+4], b[8*i+5], b[8*i+6], b[8*i+7]); + }*/ + + return last_non_zero; +} + +static void convert_matrix(int *qmat, const unsigned short *quant_matrix, + int qscale) +{ + int i; + + if (av_fdct == jpeg_fdct_ifast) { + for(i=0;i<64;i++) { + /* 16 <= qscale * quant_matrix[i] <= 7905 */ + /* 19952 <= aanscales[i] * qscale * quant_matrix[i] <= 249205026 */ + + qmat[i] = (int)(((unsigned long long)1 << (QMAT_SHIFT + 11)) / + (aanscales[i] * qscale * quant_matrix[i])); + } + } else { + for(i=0;i<64;i++) { + /* We can safely suppose that 16 <= quant_matrix[i] <= 255 + So 16 <= qscale * quant_matrix[i] <= 7905 + so (1 << QMAT_SHIFT) / 16 >= qmat[i] >= (1 << QMAT_SHIFT) / 7905 + */ + qmat[i] = (1 << QMAT_SHIFT_MMX) / (qscale * quant_matrix[i]); + } + } +} + +#define SOF0 0xC0 +#define SOI 0xD8 +#define EOI 0xD9 +#define DQT 0xDB +#define DHT 0xC4 +#define SOS 0xDA + +/* this is almost the quantisation table, used for luminance and chrominance */ +/*short int zr_default_intra_matrix[64] = { + 16, 11, 10, 16, 24, 40, 51, 61, + 12, 12, 14, 19, 26, 58, 60, 55, + 14, 13, 16, 24, 40, 57, 69, 56, + 14, 17, 22, 29, 51, 87, 80, 62, + 18, 22, 37, 56, 68, 109, 103, 77, + 24, 35, 55, 64, 81, 104, 113, 92, + 49, 64, 78, 87, 103, 121, 120, 101, + 72, 92, 95, 98, 112, 100, 103, 99 +};*/ +/* +short int default_intra_matrix[64] = { + 8, 16, 19, 22, 26, 27, 29, 34, + 16, 16, 22, 24, 27, 29, 34, 37, + 19, 22, 26, 27, 29, 34, 34, 38, + 22, 22, 26, 27, 29, 34, 37, 40, + 22, 26, 27, 29, 32, 35, 40, 48, + 26, 27, 29, 32, 35, 40, 48, 58, + 26, 27, 29, 34, 38, 46, 56, 69, + 27, 29, 35, 38, 46, 56, 69, 83 +}; +*/ +extern short int default_intra_matrix[64]; + +static short int intra_matrix[64]; + +/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */ +/* IMPORTANT: these are only valid for 8-bit data precision! */ +static const unsigned char 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 unsigned char val_dc_luminance[] = +{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; + +#if 0 +static const unsigned char 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 unsigned char val_dc_chrominance[] = +{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; +#endif + +static const unsigned char 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 unsigned char 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 +}; + +#if 0 +static const unsigned char 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 unsigned char 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 +}; +#endif + +static unsigned char huff_size_dc_luminance[12]; +static unsigned short huff_code_dc_luminance[12]; +#if 0 +unsigned char huff_size_dc_chrominance[12]; +unsigned short huff_code_dc_chrominance[12]; +#endif + +static unsigned char huff_size_ac_luminance[256]; +static unsigned short huff_code_ac_luminance[256]; +#if 0 +unsigned char huff_size_ac_chrominance[256]; +unsigned short huff_code_ac_chrominance[256]; +#endif + +static int last_dc[3]; +static int block_last_index[4]; + +/* isn't this function nicer than the one in the libjpeg ? */ +static void build_huffman_codes(unsigned char *huff_size, + unsigned short *huff_code, const unsigned char *bits_table, + const unsigned char *val_table) +{ + int i, j, k,nb, code, sym; + + code = 0; + k = 0; + for(i=1;i<=16;i++) { + nb = bits_table[i]; + for(j=0;jbuf_ptr; + put_bits(p, 16, 0); /* patched later */ + size = 2; + size += put_huffman_table(0, 0, bits_dc_luminance, val_dc_luminance); + // size += put_huffman_table(0, 1, bits_dc_chrominance, val_dc_chrominance); + + ptr[0] = size >> 8; + ptr[1] = size; + put_marker(p, DHT); + flush_put_bits(p); + ptr = p->buf_ptr; + put_bits(p, 16, 0); /* patched later */ + size = 2; + size += put_huffman_table(1, 0, bits_ac_luminance, val_ac_luminance); + // size += put_huffman_table(1, 1, bits_ac_chrominance, val_ac_chrominance); + ptr[0] = size >> 8; + ptr[1] = size; +} + +static void zr_mjpeg_picture_header() +{ + put_marker(&pb, SOI); + + if (first) { + jpeg_qtable_header(); + jpeg_htable_header(); + first = 0; + } + put_marker(&pb, SOF0); + + put_bits(&pb, 16, 17); + put_bits(&pb, 8, 8); /* 8 bits/component */ + put_bits(&pb, 16, height); + put_bits(&pb, 16, width); + put_bits(&pb, 8, 3); /* 3 components */ + + /* Y component */ + put_bits(&pb, 8, 0); /* component number */ + put_bits(&pb, 4, 2); /* H factor */ + put_bits(&pb, 4, 1); /* V factor */ + put_bits(&pb, 8, 0); /* select matrix */ + + /* Cb component */ + put_bits(&pb, 8, 1); /* component number */ + put_bits(&pb, 4, 1); /* H factor */ + put_bits(&pb, 4, 1); /* V factor */ + put_bits(&pb, 8, 0); /* select matrix */ + + /* Cr component */ + put_bits(&pb, 8, 2); /* component number */ + put_bits(&pb, 4, 1); /* H factor */ + put_bits(&pb, 4, 1); /* V factor */ + put_bits(&pb, 8, 0); /* select matrix */ + + + /* scan header */ + put_marker(&pb, SOS); + put_bits(&pb, 16, 12); /* length */ + put_bits(&pb, 8, 3); /* 3 components */ + + /* Y component */ + put_bits(&pb, 8, 0); /* index */ + put_bits(&pb, 4, 0); /* DC huffman table index */ + put_bits(&pb, 4, 0); /* AC huffman table index */ + + /* Cb component */ + put_bits(&pb, 8, 1); /* index */ + put_bits(&pb, 4, 0); /* DC huffman table index */ + put_bits(&pb, 4, 0); /* AC huffman table index */ + + /* Cr component */ + put_bits(&pb, 8, 2); /* index */ + put_bits(&pb, 4, 0); /* DC huffman table index */ + put_bits(&pb, 4, 0); /* AC huffman table index */ + + put_bits(&pb, 8, 0); /* Ss (not used) */ + put_bits(&pb, 8, 63); /* Se (not used) */ + put_bits(&pb, 8, 0); /* (not used) */ +} + +static void zr_flush_buffer(PutBitContext *s) +{ + int size; + if (s->write_data) { + size = s->buf_ptr - s->buf; + if (size > 0) + s->write_data(s->opaque, s->buf, size); + s->buf_ptr = s->buf; + s->data_out_size += size; + } +} + +/* pad the end of the output stream with ones */ +static void zr_jflush_put_bits(PutBitContext *s) +{ + unsigned int b; + s->bit_buf |= ~1U >> s->bit_cnt; /* set all the unused bits to one */ + + while (s->bit_cnt > 0) { + b = s->bit_buf >> 24; + *s->buf_ptr++ = b; + if (b == 0xff) + *s->buf_ptr++ = 0; + s->bit_buf<<=8; + s->bit_cnt-=8; + } + zr_flush_buffer(s); + s->bit_cnt=0; + s->bit_buf=0; +} + +static void zr_mjpeg_picture_trailer() +{ + zr_jflush_put_bits(&pb); + put_marker(&pb, EOI); +} + +static inline void encode_dc(int val, unsigned char *huff_size, + unsigned short *huff_code) +{ + int mant, nbits; + + if (val == 0) { + // printf("dc val=0 "); + jput_bits(&pb, huff_size[0], huff_code[0]); + //printf("dc encoding %d %d\n", huff_size[0], huff_code[0]); + } else { + mant = val; + if (val < 0) { + val = -val; + mant--; + } + + /* compute the log (XXX: optimize) */ + nbits = 0; + while (val != 0) { + val = val >> 1; + nbits++; + } + /*nbits = av_log2(val);*/ + + //printf("dc "); + jput_bits(&pb, huff_size[nbits], huff_code[nbits]); + //printf("dc encoding %d %d\n", huff_size[nbits], huff_code[nbits]); + + //printf("dc "); + jput_bits(&pb, nbits, mant & ((1 << nbits) - 1)); + //printf("dc encoding %d %d\n", huff_size[nbits], huff_code[nbits]); + } +} + +static void encode_block(DCTELEM *b, int n) +{ + int mant, nbits, code, i, j; + int component, dc, run, last_index, val; + unsigned char *huff_size_ac; + unsigned short *huff_code_ac; + + /* DC coef */ + component = (n <= 1 ? 0 : n - 2 + 1); + dc = b[0]; /* overflow is impossible */ + /*for (i = 0; i < 8; i++) { + printf("%i %i %i %i %i %i %i %i\n", b[8*i], b[8*i+1], b[8*i+2], + b[8*i+3], b[8*i+4], b[8+i*5], b[8+i*6], b[8+i*7]); + }*/ + val = dc - last_dc[component]; + //if (n < 2) { + encode_dc(val, huff_size_dc_luminance, huff_code_dc_luminance); + huff_size_ac = huff_size_ac_luminance; + huff_code_ac = huff_code_ac_luminance; + //} else { + // encode_dc(val, huff_size_dc_chrominance, huff_code_dc_chrominance); + // huff_size_ac = huff_size_ac_chrominance; + // huff_code_ac = huff_code_ac_chrominance; + //} + last_dc[component] = dc; + + /* AC coefs */ + + run = 0; + last_index = block_last_index[n]; + for(i=1;i<=last_index;i++) { + j = zr_zigzag_direct[i]; + val = b[j]; + if (val == 0) { + run++; + } else { + while (run >= 16) { + //printf("ac 16 white "); + jput_bits(&pb, huff_size_ac[0xf0], huff_code_ac[0xf0]); + run -= 16; + } + mant = val; + if (val < 0) { + val = -val; + mant--; + } + + /* compute the log (XXX: optimize) */ + nbits = 0; + while (val != 0) { + val = val >> 1; + nbits++; + } + code = (run << 4) | nbits; + + //printf("ac "); + jput_bits(&pb, huff_size_ac[code], huff_code_ac[code]); + + //printf("ac "); + jput_bits(&pb, nbits, mant & ((1 << nbits) - 1)); + run = 0; + } + } + + /* output EOB only if not already 64 values */ + if (last_index < 63 || run != 0) { + //printf("ac EOB "); + jput_bits(&pb, huff_size_ac[0], huff_code_ac[0]); + } +} + +static void zr_mjpeg_encode_mb(DCTELEM **bla) +{ + encode_block(*(bla), 0); + encode_block(*(bla+1), 1); + if (bw) { + jput_bits(&pb, 12, 512+128+8+2); /* 2 times code for 'no color' + * 001010001010 */ + } else { + encode_block(*(bla+2), 2); + encode_block(*(bla+3), 3); + } +} + +static int mb_width, mb_height, mb_x, mb_y; +static unsigned char *y_data, *u_data, *v_data; +static int y_ps, u_ps, v_ps, y_rs, u_rs, v_rs; +static char code[256*1024]; // 256kb! +/* this function can take all kinds of YUV colorspaces + * YV12, YVYU, UYVY. The necesary parameters must be set up by te caller + * y_ps means "y pixel size", y_rs means "y row size". + * For YUYV, for example, is u = y + 1, v = y + 3, y_ps = 2, u_ps = 4 + * v_ps = 4, y_rs = u_rs = v_rs. + * + * The data is straightened out at the moment it is put in DCT + * blocks, there are therefore no spurious memcopies involved */ +/* Notice that w must be a multiple of 16 and h must be a multiple of + * fields*8 */ +/* We produce YUV422 jpegs, the colors must be subsampled horizontally, + * if the colors are also subsampled vertically, then this function + * performs cheap upsampling (better solution will be: a DCT that is + * optimized in the case that every two rows are the same) */ +/* cu = 0 means 'No cheap upsampling' + * cu = 1 means 'perform cheap upsampling' */ +void mjpeg_encoder_init(int w, int h, + unsigned char* y, int y_psize, int y_rsize, + unsigned char* u, int u_psize, int u_rsize, + unsigned char* v, int v_psize, int v_rsize, + int f, int cu, int q, int b) { + int i; + mp_msg(MSGT_VO, MSGL_V, "JPEnc init: %dx%d %p %d %d %p %d %d %p %d %d\n", + w, h, y, y_psize, y_rsize, + u, u_psize, u_rsize, + v, v_psize, v_rsize); + y_data = y; u_data = u; v_data = v; + y_ps = y_psize; u_ps = u_psize; v_ps = v_psize; + y_rs = y_rsize*f; + u_rs = u_rsize*f; + v_rs = v_rsize*f; + width = w; + height = h/f; + fields = f; + qscale = q; + cheap_upsample = cu; + mb_width = width/16; + mb_height = height/8; + bw = b; + zr_mjpeg_init(); + i = 0; + intra_matrix[0] = default_intra_matrix[0]; + for (i = 1; i < 64; i++) { + intra_matrix[i] = (default_intra_matrix[i]*qscale) >> 3; + } + if ( +#ifdef HAVE_MMX + av_fdct != fdct_mmx && +#endif + av_fdct != jpeg_fdct_ifast) { + /* libavcodec is probably not yet initialized */ + av_fdct = jpeg_fdct_ifast; +#ifdef HAVE_MMX + dsputil_init_mmx(); +#endif + } + convert_matrix(q_intra_matrix, intra_matrix, 8); + blck = malloc(4*sizeof(DCTELEM*)); + blck[0] = malloc(64*sizeof(DCTELEM)); + blck[1] = malloc(64*sizeof(DCTELEM)); + blck[2] = malloc(64*sizeof(DCTELEM)); + blck[3] = malloc(64*sizeof(DCTELEM)); +} + +int mjpeg_encode_frame(char *bufr, int field) { + int i, j, k, l; + short int *dest; + unsigned char *source; + /* initialize the buffer */ + if (field == 1) { + y_data += y_rs/2; + u_data += u_rs/2; + v_data += v_rs/2; + } + init_put_bits(&pb, bufr, 1024*256, NULL, NULL); + + zr_mjpeg_picture_header(); + + last_dc[0] = 128; last_dc[1] = 128; last_dc[2] = 128; + mb_x = 0; + mb_y = 0; + for (mb_y = 0; mb_y < mb_height; mb_y++) { + for (mb_x = 0; mb_x < mb_width; mb_x++) { + //printf("Processing macroblock mb_x=%d, mb_y=%d, mb_width=%d, mb_height=%d, size=%d\n", mb_x, mb_y, mb_width, mb_height, pb.buf_ptr - pb.buf); + /* fill 2 Y macroblocks and one U and one V */ + source = mb_y * 8 * y_rs + 16 * y_ps * mb_x + y_data; + dest = blck[0]; + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + dest[j] = source[j*y_ps]; + } + dest += 8; + source += y_rs; + } + source = mb_y * 8 * y_rs + (16*mb_x + 8)*y_ps + y_data; + dest = blck[1]; + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + dest[j] = source[j*y_ps]; + } + dest += 8; + source += y_rs; + } + if (!bw) { + if (cheap_upsample) { + source = mb_y*4*u_rs + 8*mb_x*u_ps + u_data; + dest = blck[2]; + for (i = 0; i < 4; i++) { + for (j = 0; j < 8; j++) { + dest[j] = source[j*u_ps]; + dest[j+8] = source[j*u_ps]; + } + dest += 16; + source += u_rs; + } + source = mb_y*4*v_rs + 8*mb_x*v_ps + v_data; + dest = blck[3]; + for (i = 0; i < 4; i++) { + for (j = 0; j < 8; j++) { + dest[j] = source[j*v_ps]; + dest[j+8] = source[j*v_ps]; + } + dest += 16; + source += u_rs; + } + } else { + source = mb_y*8*u_rs + 8*mb_x*u_ps + u_data; + dest = blck[2]; + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + dest[j] = source[j*u_ps]; + } + dest += 8; + source += u_rs; + } + source = mb_y*8*v_rs + 8*mb_x*v_ps + v_data; + dest = blck[3]; + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + dest[j] = source[j*v_ps]; + } + dest += 8; + source += u_rs; + } + } + } + /* so, **blck is filled now... */ + + for(i = 0; i < 2; i++) { + if (av_fdct == jpeg_fdct_ifast) + block_last_index[i] = + dct_quantize(blck[i], + i, qscale); + else + block_last_index[i] = + dct_quantize_mmx(blck[i], + i, qscale); + } + if (!bw) { + for(i = 2; i < 4; i++) { + if (av_fdct == jpeg_fdct_ifast) + block_last_index[i] = + dct_quantize(blck[i], + i, qscale); + else + block_last_index[i] = + dct_quantize_mmx(blck[i], + i, qscale); + } + } + zr_mjpeg_encode_mb(blck); + } + } + emms_c(); + zr_mjpeg_picture_trailer(); + flush_put_bits(&pb); + zr_mjpeg_close(); + if (field == 1) { + y_data -= y_rs/2; + u_data -= u_rs/2; + v_data -= v_rs/2; + } + return pb.buf_ptr - pb.buf; +} +