yading@10: /*
yading@10:  * MJPEG encoder
yading@10:  * Copyright (c) 2000, 2001 Fabrice Bellard
yading@10:  * Copyright (c) 2003 Alex Beregszaszi
yading@10:  * Copyright (c) 2003-2004 Michael Niedermayer
yading@10:  *
yading@10:  * Support for external huffman table, various fixes (AVID workaround),
yading@10:  * aspecting, new decode_frame mechanism and apple mjpeg-b support
yading@10:  *                                  by Alex Beregszaszi
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * MJPEG encoder.
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "mpegvideo.h"
yading@10: #include "mjpeg.h"
yading@10: #include "mjpegenc.h"
yading@10: 
yading@10: /* use two quantizer tables (one for luminance and one for chrominance) */
yading@10: /* not yet working */
yading@10: #undef TWOMATRIXES
yading@10: 
yading@10: 
yading@10: av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
yading@10: {
yading@10:     MJpegContext *m;
yading@10: 
yading@10:     if (s->width > 65500 || s->height > 65500) {
yading@10:         av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     m = av_malloc(sizeof(MJpegContext));
yading@10:     if (!m)
yading@10:         return -1;
yading@10: 
yading@10:     s->min_qcoeff=-1023;
yading@10:     s->max_qcoeff= 1023;
yading@10: 
yading@10:     /* build all the huffman tables */
yading@10:     ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
yading@10:                                  m->huff_code_dc_luminance,
yading@10:                                  avpriv_mjpeg_bits_dc_luminance,
yading@10:                                  avpriv_mjpeg_val_dc);
yading@10:     ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
yading@10:                                  m->huff_code_dc_chrominance,
yading@10:                                  avpriv_mjpeg_bits_dc_chrominance,
yading@10:                                  avpriv_mjpeg_val_dc);
yading@10:     ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
yading@10:                                  m->huff_code_ac_luminance,
yading@10:                                  avpriv_mjpeg_bits_ac_luminance,
yading@10:                                  avpriv_mjpeg_val_ac_luminance);
yading@10:     ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
yading@10:                                  m->huff_code_ac_chrominance,
yading@10:                                  avpriv_mjpeg_bits_ac_chrominance,
yading@10:                                  avpriv_mjpeg_val_ac_chrominance);
yading@10: 
yading@10:     s->mjpeg_ctx = m;
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: void ff_mjpeg_encode_close(MpegEncContext *s)
yading@10: {
yading@10:     av_free(s->mjpeg_ctx);
yading@10: }
yading@10: 
yading@10: /* table_class: 0 = DC coef, 1 = AC coefs */
yading@10: static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
yading@10:                              const uint8_t *bits_table, const uint8_t *value_table)
yading@10: {
yading@10:     PutBitContext *p = &s->pb;
yading@10:     int n, i;
yading@10: 
yading@10:     put_bits(p, 4, table_class);
yading@10:     put_bits(p, 4, table_id);
yading@10: 
yading@10:     n = 0;
yading@10:     for(i=1;i<=16;i++) {
yading@10:         n += bits_table[i];
yading@10:         put_bits(p, 8, bits_table[i]);
yading@10:     }
yading@10: 
yading@10:     for(i=0;i<n;i++)
yading@10:         put_bits(p, 8, value_table[i]);
yading@10: 
yading@10:     return n + 17;
yading@10: }
yading@10: 
yading@10: static void jpeg_table_header(MpegEncContext *s)
yading@10: {
yading@10:     PutBitContext *p = &s->pb;
yading@10:     int i, j, size;
yading@10:     uint8_t *ptr;
yading@10: 
yading@10:     /* quant matrixes */
yading@10:     put_marker(p, DQT);
yading@10: #ifdef TWOMATRIXES
yading@10:     put_bits(p, 16, 2 + 2 * (1 + 64));
yading@10: #else
yading@10:     put_bits(p, 16, 2 + 1 * (1 + 64));
yading@10: #endif
yading@10:     put_bits(p, 4, 0); /* 8 bit precision */
yading@10:     put_bits(p, 4, 0); /* table 0 */
yading@10:     for(i=0;i<64;i++) {
yading@10:         j = s->intra_scantable.permutated[i];
yading@10:         put_bits(p, 8, s->intra_matrix[j]);
yading@10:     }
yading@10: #ifdef TWOMATRIXES
yading@10:     put_bits(p, 4, 0); /* 8 bit precision */
yading@10:     put_bits(p, 4, 1); /* table 1 */
yading@10:     for(i=0;i<64;i++) {
yading@10:         j = s->intra_scantable.permutated[i];
yading@10:         put_bits(p, 8, s->chroma_intra_matrix[j]);
yading@10:     }
yading@10: #endif
yading@10: 
yading@10:     if(s->avctx->active_thread_type & FF_THREAD_SLICE){
yading@10:         put_marker(p, DRI);
yading@10:         put_bits(p, 16, 4);
yading@10:         put_bits(p, 16, (s->width-1)/(8*s->mjpeg_hsample[0]) + 1);
yading@10:     }
yading@10: 
yading@10:     /* huffman table */
yading@10:     put_marker(p, DHT);
yading@10:     flush_put_bits(p);
yading@10:     ptr = put_bits_ptr(p);
yading@10:     put_bits(p, 16, 0); /* patched later */
yading@10:     size = 2;
yading@10:     size += put_huffman_table(s, 0, 0, avpriv_mjpeg_bits_dc_luminance,
yading@10:                               avpriv_mjpeg_val_dc);
yading@10:     size += put_huffman_table(s, 0, 1, avpriv_mjpeg_bits_dc_chrominance,
yading@10:                               avpriv_mjpeg_val_dc);
yading@10: 
yading@10:     size += put_huffman_table(s, 1, 0, avpriv_mjpeg_bits_ac_luminance,
yading@10:                               avpriv_mjpeg_val_ac_luminance);
yading@10:     size += put_huffman_table(s, 1, 1, avpriv_mjpeg_bits_ac_chrominance,
yading@10:                               avpriv_mjpeg_val_ac_chrominance);
yading@10:     AV_WB16(ptr, size);
yading@10: }
yading@10: 
yading@10: static void jpeg_put_comments(MpegEncContext *s)
yading@10: {
yading@10:     PutBitContext *p = &s->pb;
yading@10:     int size;
yading@10:     uint8_t *ptr;
yading@10: 
yading@10:     if (s->avctx->sample_aspect_ratio.num /* && !lossless */)
yading@10:     {
yading@10:     /* JFIF header */
yading@10:     put_marker(p, APP0);
yading@10:     put_bits(p, 16, 16);
yading@10:     avpriv_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
yading@10:     put_bits(p, 16, 0x0102); /* v 1.02 */
yading@10:     put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
yading@10:     put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
yading@10:     put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
yading@10:     put_bits(p, 8, 0); /* thumbnail width */
yading@10:     put_bits(p, 8, 0); /* thumbnail height */
yading@10:     }
yading@10: 
yading@10:     /* comment */
yading@10:     if(!(s->flags & CODEC_FLAG_BITEXACT)){
yading@10:         put_marker(p, COM);
yading@10:         flush_put_bits(p);
yading@10:         ptr = put_bits_ptr(p);
yading@10:         put_bits(p, 16, 0); /* patched later */
yading@10:         avpriv_put_string(p, LIBAVCODEC_IDENT, 1);
yading@10:         size = strlen(LIBAVCODEC_IDENT)+3;
yading@10:         AV_WB16(ptr, size);
yading@10:     }
yading@10: 
yading@10:     if(  s->avctx->pix_fmt == AV_PIX_FMT_YUV420P
yading@10:        ||s->avctx->pix_fmt == AV_PIX_FMT_YUV422P
yading@10:        ||s->avctx->pix_fmt == AV_PIX_FMT_YUV444P){
yading@10:         put_marker(p, COM);
yading@10:         flush_put_bits(p);
yading@10:         ptr = put_bits_ptr(p);
yading@10:         put_bits(p, 16, 0); /* patched later */
yading@10:         avpriv_put_string(p, "CS=ITU601", 1);
yading@10:         size = strlen("CS=ITU601")+3;
yading@10:         AV_WB16(ptr, size);
yading@10:     }
yading@10: }
yading@10: 
yading@10: void ff_mjpeg_encode_picture_header(MpegEncContext *s)
yading@10: {
yading@10:     const int lossless= s->avctx->codec_id != AV_CODEC_ID_MJPEG;
yading@10:     int i;
yading@10: 
yading@10:     put_marker(&s->pb, SOI);
yading@10: 
yading@10:     // hack for AMV mjpeg format
yading@10:     if(s->avctx->codec_id == AV_CODEC_ID_AMV) goto end;
yading@10: 
yading@10:     jpeg_put_comments(s);
yading@10: 
yading@10:     jpeg_table_header(s);
yading@10: 
yading@10:     switch(s->avctx->codec_id){
yading@10:     case AV_CODEC_ID_MJPEG:  put_marker(&s->pb, SOF0 ); break;
yading@10:     case AV_CODEC_ID_LJPEG:  put_marker(&s->pb, SOF3 ); break;
yading@10:     default: av_assert0(0);
yading@10:     }
yading@10: 
yading@10:     put_bits(&s->pb, 16, 17);
yading@10:     if(lossless && (s->avctx->pix_fmt == AV_PIX_FMT_BGR0
yading@10:                     || s->avctx->pix_fmt == AV_PIX_FMT_BGRA
yading@10:                     || s->avctx->pix_fmt == AV_PIX_FMT_BGR24))
yading@10:         put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
yading@10:     else
yading@10:         put_bits(&s->pb, 8, 8); /* 8 bits/component */
yading@10:     put_bits(&s->pb, 16, s->height);
yading@10:     put_bits(&s->pb, 16, s->width);
yading@10:     put_bits(&s->pb, 8, 3); /* 3 components */
yading@10: 
yading@10:     /* Y component */
yading@10:     put_bits(&s->pb, 8, 1); /* component number */
yading@10:     put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
yading@10:     put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
yading@10:     put_bits(&s->pb, 8, 0); /* select matrix */
yading@10: 
yading@10:     /* Cb component */
yading@10:     put_bits(&s->pb, 8, 2); /* component number */
yading@10:     put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
yading@10:     put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
yading@10: #ifdef TWOMATRIXES
yading@10:     put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
yading@10: #else
yading@10:     put_bits(&s->pb, 8, 0); /* select matrix */
yading@10: #endif
yading@10: 
yading@10:     /* Cr component */
yading@10:     put_bits(&s->pb, 8, 3); /* component number */
yading@10:     put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
yading@10:     put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
yading@10: #ifdef TWOMATRIXES
yading@10:     put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
yading@10: #else
yading@10:     put_bits(&s->pb, 8, 0); /* select matrix */
yading@10: #endif
yading@10: 
yading@10:     /* scan header */
yading@10:     put_marker(&s->pb, SOS);
yading@10:     put_bits(&s->pb, 16, 12); /* length */
yading@10:     put_bits(&s->pb, 8, 3); /* 3 components */
yading@10: 
yading@10:     /* Y component */
yading@10:     put_bits(&s->pb, 8, 1); /* index */
yading@10:     put_bits(&s->pb, 4, 0); /* DC huffman table index */
yading@10:     put_bits(&s->pb, 4, 0); /* AC huffman table index */
yading@10: 
yading@10:     /* Cb component */
yading@10:     put_bits(&s->pb, 8, 2); /* index */
yading@10:     put_bits(&s->pb, 4, 1); /* DC huffman table index */
yading@10:     put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
yading@10: 
yading@10:     /* Cr component */
yading@10:     put_bits(&s->pb, 8, 3); /* index */
yading@10:     put_bits(&s->pb, 4, 1); /* DC huffman table index */
yading@10:     put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
yading@10: 
yading@10:     put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
yading@10: 
yading@10:     switch(s->avctx->codec_id){
yading@10:     case AV_CODEC_ID_MJPEG:  put_bits(&s->pb, 8, 63); break; /* Se (not used) */
yading@10:     case AV_CODEC_ID_LJPEG:  put_bits(&s->pb, 8,  0); break; /* not used */
yading@10:     default: av_assert0(0);
yading@10:     }
yading@10: 
yading@10:     put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
yading@10: 
yading@10: end:
yading@10:     s->esc_pos = put_bits_count(&s->pb) >> 3;
yading@10:     for(i=1; i<s->slice_context_count; i++)
yading@10:         s->thread_context[i]->esc_pos = 0;
yading@10: }
yading@10: 
yading@10: static void escape_FF(MpegEncContext *s, int start)
yading@10: {
yading@10:     int size= put_bits_count(&s->pb) - start*8;
yading@10:     int i, ff_count;
yading@10:     uint8_t *buf= s->pb.buf + start;
yading@10:     int align= (-(size_t)(buf))&3;
yading@10: 
yading@10:     av_assert1((size&7) == 0);
yading@10:     size >>= 3;
yading@10: 
yading@10:     ff_count=0;
yading@10:     for(i=0; i<size && i<align; i++){
yading@10:         if(buf[i]==0xFF) ff_count++;
yading@10:     }
yading@10:     for(; i<size-15; i+=16){
yading@10:         int acc, v;
yading@10: 
yading@10:         v= *(uint32_t*)(&buf[i]);
yading@10:         acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
yading@10:         v= *(uint32_t*)(&buf[i+4]);
yading@10:         acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
yading@10:         v= *(uint32_t*)(&buf[i+8]);
yading@10:         acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
yading@10:         v= *(uint32_t*)(&buf[i+12]);
yading@10:         acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
yading@10: 
yading@10:         acc>>=4;
yading@10:         acc+= (acc>>16);
yading@10:         acc+= (acc>>8);
yading@10:         ff_count+= acc&0xFF;
yading@10:     }
yading@10:     for(; i<size; i++){
yading@10:         if(buf[i]==0xFF) ff_count++;
yading@10:     }
yading@10: 
yading@10:     if(ff_count==0) return;
yading@10: 
yading@10:     flush_put_bits(&s->pb);
yading@10:     skip_put_bytes(&s->pb, ff_count);
yading@10: 
yading@10:     for(i=size-1; ff_count; i--){
yading@10:         int v= buf[i];
yading@10: 
yading@10:         if(v==0xFF){
yading@10:             buf[i+ff_count]= 0;
yading@10:             ff_count--;
yading@10:         }
yading@10: 
yading@10:         buf[i+ff_count]= v;
yading@10:     }
yading@10: }
yading@10: 
yading@10: void ff_mjpeg_encode_stuffing(MpegEncContext *s)
yading@10: {
yading@10:     int length, i;
yading@10:     PutBitContext *pbc = &s->pb;
yading@10:     int mb_y = s->mb_y - !s->mb_x;
yading@10:     length= (-put_bits_count(pbc))&7;
yading@10:     if(length) put_bits(pbc, length, (1<<length)-1);
yading@10: 
yading@10:     flush_put_bits(&s->pb);
yading@10:     escape_FF(s, s->esc_pos);
yading@10: 
yading@10:     if((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height)
yading@10:         put_marker(pbc, RST0 + (mb_y&7));
yading@10:     s->esc_pos = put_bits_count(pbc) >> 3;
yading@10: 
yading@10:     for(i=0; i<3; i++)
yading@10:         s->last_dc[i] = 128 << s->intra_dc_precision;
yading@10: }
yading@10: 
yading@10: void ff_mjpeg_encode_picture_trailer(MpegEncContext *s)
yading@10: {
yading@10: 
yading@10:     av_assert1((s->header_bits&7)==0);
yading@10: 
yading@10: 
yading@10:     put_marker(&s->pb, EOI);
yading@10: }
yading@10: 
yading@10: void ff_mjpeg_encode_dc(MpegEncContext *s, int val,
yading@10:                         uint8_t *huff_size, uint16_t *huff_code)
yading@10: {
yading@10:     int mant, nbits;
yading@10: 
yading@10:     if (val == 0) {
yading@10:         put_bits(&s->pb, huff_size[0], huff_code[0]);
yading@10:     } else {
yading@10:         mant = val;
yading@10:         if (val < 0) {
yading@10:             val = -val;
yading@10:             mant--;
yading@10:         }
yading@10: 
yading@10:         nbits= av_log2_16bit(val) + 1;
yading@10: 
yading@10:         put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
yading@10: 
yading@10:         put_sbits(&s->pb, nbits, mant);
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void encode_block(MpegEncContext *s, int16_t *block, int n)
yading@10: {
yading@10:     int mant, nbits, code, i, j;
yading@10:     int component, dc, run, last_index, val;
yading@10:     MJpegContext *m = s->mjpeg_ctx;
yading@10:     uint8_t *huff_size_ac;
yading@10:     uint16_t *huff_code_ac;
yading@10: 
yading@10:     /* DC coef */
yading@10:     component = (n <= 3 ? 0 : (n&1) + 1);
yading@10:     dc = block[0]; /* overflow is impossible */
yading@10:     val = dc - s->last_dc[component];
yading@10:     if (n < 4) {
yading@10:         ff_mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
yading@10:         huff_size_ac = m->huff_size_ac_luminance;
yading@10:         huff_code_ac = m->huff_code_ac_luminance;
yading@10:     } else {
yading@10:         ff_mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
yading@10:         huff_size_ac = m->huff_size_ac_chrominance;
yading@10:         huff_code_ac = m->huff_code_ac_chrominance;
yading@10:     }
yading@10:     s->last_dc[component] = dc;
yading@10: 
yading@10:     /* AC coefs */
yading@10: 
yading@10:     run = 0;
yading@10:     last_index = s->block_last_index[n];
yading@10:     for(i=1;i<=last_index;i++) {
yading@10:         j = s->intra_scantable.permutated[i];
yading@10:         val = block[j];
yading@10:         if (val == 0) {
yading@10:             run++;
yading@10:         } else {
yading@10:             while (run >= 16) {
yading@10:                 put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
yading@10:                 run -= 16;
yading@10:             }
yading@10:             mant = val;
yading@10:             if (val < 0) {
yading@10:                 val = -val;
yading@10:                 mant--;
yading@10:             }
yading@10: 
yading@10:             nbits= av_log2(val) + 1;
yading@10:             code = (run << 4) | nbits;
yading@10: 
yading@10:             put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
yading@10: 
yading@10:             put_sbits(&s->pb, nbits, mant);
yading@10:             run = 0;
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     /* output EOB only if not already 64 values */
yading@10:     if (last_index < 63 || run != 0)
yading@10:         put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
yading@10: }
yading@10: 
yading@10: void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[6][64])
yading@10: {
yading@10:     int i;
yading@10:     if (s->chroma_format == CHROMA_444) {
yading@10:         encode_block(s, block[0], 0);
yading@10:         encode_block(s, block[2], 2);
yading@10:         encode_block(s, block[4], 4);
yading@10:         encode_block(s, block[8], 8);
yading@10:         encode_block(s, block[5], 5);
yading@10:         encode_block(s, block[9], 9);
yading@10: 
yading@10:         if (16*s->mb_x+8 < s->width) {
yading@10:             encode_block(s, block[1], 1);
yading@10:             encode_block(s, block[3], 3);
yading@10:             encode_block(s, block[6], 6);
yading@10:             encode_block(s, block[10], 10);
yading@10:             encode_block(s, block[7], 7);
yading@10:             encode_block(s, block[11], 11);
yading@10:         }
yading@10:     } else {
yading@10:         for(i=0;i<5;i++) {
yading@10:             encode_block(s, block[i], i);
yading@10:         }
yading@10:         if (s->chroma_format == CHROMA_420) {
yading@10:             encode_block(s, block[5], 5);
yading@10:         } else {
yading@10:             encode_block(s, block[6], 6);
yading@10:             encode_block(s, block[5], 5);
yading@10:             encode_block(s, block[7], 7);
yading@10:         }
yading@10:     }
yading@10: 
yading@10:     s->i_tex_bits += get_bits_diff(s);
yading@10: }
yading@10: 
yading@10: // maximum over s->mjpeg_vsample[i]
yading@10: #define V_MAX 2
yading@10: static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
yading@10:                               const AVFrame *pic_arg, int *got_packet)
yading@10: 
yading@10: {
yading@10:     MpegEncContext *s = avctx->priv_data;
yading@10:     AVFrame pic = *pic_arg;
yading@10:     int i;
yading@10: 
yading@10:     //CODEC_FLAG_EMU_EDGE have to be cleared
yading@10:     if(s->avctx->flags & CODEC_FLAG_EMU_EDGE)
yading@10:         return -1;
yading@10: 
yading@10:     //picture should be flipped upside-down
yading@10:     for(i=0; i < 3; i++) {
yading@10:         pic.data[i] += (pic.linesize[i] * (s->mjpeg_vsample[i] * (8 * s->mb_height -((s->height/V_MAX)&7)) - 1 ));
yading@10:         pic.linesize[i] *= -1;
yading@10:     }
yading@10:     return ff_MPV_encode_picture(avctx, pkt, &pic, got_packet);
yading@10: }
yading@10: 
yading@10: #if CONFIG_MJPEG_ENCODER
yading@10: AVCodec ff_mjpeg_encoder = {
yading@10:     .name           = "mjpeg",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_MJPEG,
yading@10:     .priv_data_size = sizeof(MpegEncContext),
yading@10:     .init           = ff_MPV_encode_init,
yading@10:     .encode2        = ff_MPV_encode_picture,
yading@10:     .close          = ff_MPV_encode_end,
yading@10:     .capabilities   = CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){
yading@10:         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE
yading@10:     },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
yading@10: };
yading@10: #endif
yading@10: #if CONFIG_AMV_ENCODER
yading@10: AVCodec ff_amv_encoder = {
yading@10:     .name           = "amv",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_AMV,
yading@10:     .priv_data_size = sizeof(MpegEncContext),
yading@10:     .init           = ff_MPV_encode_init,
yading@10:     .encode2        = amv_encode_picture,
yading@10:     .close          = ff_MPV_encode_end,
yading@10:     .pix_fmts       = (const enum AVPixelFormat[]){
yading@10:         AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_NONE
yading@10:     },
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("AMV Video"),
yading@10: };
yading@10: #endif