summaryrefslogtreecommitdiff
path: root/ffmpeg1/libavcodec/mjpegenc.c
diff options
context:
space:
mode:
Diffstat (limited to 'ffmpeg1/libavcodec/mjpegenc.c')
-rw-r--r--ffmpeg1/libavcodec/mjpegenc.c544
1 files changed, 0 insertions, 544 deletions
diff --git a/ffmpeg1/libavcodec/mjpegenc.c b/ffmpeg1/libavcodec/mjpegenc.c
deleted file mode 100644
index 80a4022..0000000
--- a/ffmpeg1/libavcodec/mjpegenc.c
+++ /dev/null
@@ -1,544 +0,0 @@
-/*
- * MJPEG encoder
- * Copyright (c) 2000, 2001 Fabrice Bellard
- * Copyright (c) 2003 Alex Beregszaszi
- * Copyright (c) 2003-2004 Michael Niedermayer
- *
- * Support for external huffman table, various fixes (AVID workaround),
- * aspecting, new decode_frame mechanism and apple mjpeg-b support
- * by Alex Beregszaszi
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * MJPEG encoder.
- */
-
-#include "avcodec.h"
-#include "mpegvideo.h"
-#include "mjpeg.h"
-#include "mjpegenc.h"
-
-/* use two quantizer tables (one for luminance and one for chrominance) */
-/* not yet working */
-#undef TWOMATRIXES
-
-
-av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
-{
- MJpegContext *m;
-
- if (s->width > 65500 || s->height > 65500) {
- av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
- return -1;
- }
-
- m = av_malloc(sizeof(MJpegContext));
- if (!m)
- return -1;
-
- s->min_qcoeff=-1023;
- s->max_qcoeff= 1023;
-
- /* build all the huffman tables */
- ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance,
- m->huff_code_dc_luminance,
- avpriv_mjpeg_bits_dc_luminance,
- avpriv_mjpeg_val_dc);
- ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance,
- m->huff_code_dc_chrominance,
- avpriv_mjpeg_bits_dc_chrominance,
- avpriv_mjpeg_val_dc);
- ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance,
- m->huff_code_ac_luminance,
- avpriv_mjpeg_bits_ac_luminance,
- avpriv_mjpeg_val_ac_luminance);
- ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance,
- m->huff_code_ac_chrominance,
- avpriv_mjpeg_bits_ac_chrominance,
- avpriv_mjpeg_val_ac_chrominance);
-
- s->mjpeg_ctx = m;
- return 0;
-}
-
-void ff_mjpeg_encode_close(MpegEncContext *s)
-{
- av_free(s->mjpeg_ctx);
-}
-
-/* table_class: 0 = DC coef, 1 = AC coefs */
-static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
- const uint8_t *bits_table, const uint8_t *value_table)
-{
- PutBitContext *p = &s->pb;
- int n, i;
-
- put_bits(p, 4, table_class);
- put_bits(p, 4, table_id);
-
- n = 0;
- for(i=1;i<=16;i++) {
- n += bits_table[i];
- put_bits(p, 8, bits_table[i]);
- }
-
- for(i=0;i<n;i++)
- put_bits(p, 8, value_table[i]);
-
- return n + 17;
-}
-
-static void jpeg_table_header(MpegEncContext *s)
-{
- PutBitContext *p = &s->pb;
- int i, j, size;
- uint8_t *ptr;
-
- /* quant matrixes */
- put_marker(p, DQT);
-#ifdef TWOMATRIXES
- put_bits(p, 16, 2 + 2 * (1 + 64));
-#else
- put_bits(p, 16, 2 + 1 * (1 + 64));
-#endif
- put_bits(p, 4, 0); /* 8 bit precision */
- put_bits(p, 4, 0); /* table 0 */
- for(i=0;i<64;i++) {
- j = s->intra_scantable.permutated[i];
- put_bits(p, 8, s->intra_matrix[j]);
- }
-#ifdef TWOMATRIXES
- put_bits(p, 4, 0); /* 8 bit precision */
- put_bits(p, 4, 1); /* table 1 */
- for(i=0;i<64;i++) {
- j = s->intra_scantable.permutated[i];
- put_bits(p, 8, s->chroma_intra_matrix[j]);
- }
-#endif
-
- if(s->avctx->active_thread_type & FF_THREAD_SLICE){
- put_marker(p, DRI);
- put_bits(p, 16, 4);
- put_bits(p, 16, (s->width-1)/(8*s->mjpeg_hsample[0]) + 1);
- }
-
- /* huffman table */
- put_marker(p, DHT);
- flush_put_bits(p);
- ptr = put_bits_ptr(p);
- put_bits(p, 16, 0); /* patched later */
- size = 2;
- size += put_huffman_table(s, 0, 0, avpriv_mjpeg_bits_dc_luminance,
- avpriv_mjpeg_val_dc);
- size += put_huffman_table(s, 0, 1, avpriv_mjpeg_bits_dc_chrominance,
- avpriv_mjpeg_val_dc);
-
- size += put_huffman_table(s, 1, 0, avpriv_mjpeg_bits_ac_luminance,
- avpriv_mjpeg_val_ac_luminance);
- size += put_huffman_table(s, 1, 1, avpriv_mjpeg_bits_ac_chrominance,
- avpriv_mjpeg_val_ac_chrominance);
- AV_WB16(ptr, size);
-}
-
-static void jpeg_put_comments(MpegEncContext *s)
-{
- PutBitContext *p = &s->pb;
- int size;
- uint8_t *ptr;
-
- if (s->avctx->sample_aspect_ratio.num /* && !lossless */)
- {
- /* JFIF header */
- put_marker(p, APP0);
- put_bits(p, 16, 16);
- avpriv_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
- put_bits(p, 16, 0x0102); /* v 1.02 */
- put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
- put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
- put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
- put_bits(p, 8, 0); /* thumbnail width */
- put_bits(p, 8, 0); /* thumbnail height */
- }
-
- /* comment */
- if(!(s->flags & CODEC_FLAG_BITEXACT)){
- put_marker(p, COM);
- flush_put_bits(p);
- ptr = put_bits_ptr(p);
- put_bits(p, 16, 0); /* patched later */
- avpriv_put_string(p, LIBAVCODEC_IDENT, 1);
- size = strlen(LIBAVCODEC_IDENT)+3;
- AV_WB16(ptr, size);
- }
-
- if( s->avctx->pix_fmt == AV_PIX_FMT_YUV420P
- ||s->avctx->pix_fmt == AV_PIX_FMT_YUV422P
- ||s->avctx->pix_fmt == AV_PIX_FMT_YUV444P){
- put_marker(p, COM);
- flush_put_bits(p);
- ptr = put_bits_ptr(p);
- put_bits(p, 16, 0); /* patched later */
- avpriv_put_string(p, "CS=ITU601", 1);
- size = strlen("CS=ITU601")+3;
- AV_WB16(ptr, size);
- }
-}
-
-void ff_mjpeg_encode_picture_header(MpegEncContext *s)
-{
- const int lossless= s->avctx->codec_id != AV_CODEC_ID_MJPEG;
- int i;
-
- put_marker(&s->pb, SOI);
-
- // hack for AMV mjpeg format
- if(s->avctx->codec_id == AV_CODEC_ID_AMV) goto end;
-
- jpeg_put_comments(s);
-
- jpeg_table_header(s);
-
- switch(s->avctx->codec_id){
- case AV_CODEC_ID_MJPEG: put_marker(&s->pb, SOF0 ); break;
- case AV_CODEC_ID_LJPEG: put_marker(&s->pb, SOF3 ); break;
- default: av_assert0(0);
- }
-
- put_bits(&s->pb, 16, 17);
- if(lossless && (s->avctx->pix_fmt == AV_PIX_FMT_BGR0
- || s->avctx->pix_fmt == AV_PIX_FMT_BGRA
- || s->avctx->pix_fmt == AV_PIX_FMT_BGR24))
- put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
- else
- put_bits(&s->pb, 8, 8); /* 8 bits/component */
- put_bits(&s->pb, 16, s->height);
- put_bits(&s->pb, 16, s->width);
- put_bits(&s->pb, 8, 3); /* 3 components */
-
- /* Y component */
- put_bits(&s->pb, 8, 1); /* component number */
- put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
- put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
- put_bits(&s->pb, 8, 0); /* select matrix */
-
- /* Cb component */
- put_bits(&s->pb, 8, 2); /* component number */
- put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
- put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
-#ifdef TWOMATRIXES
- put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
-#else
- put_bits(&s->pb, 8, 0); /* select matrix */
-#endif
-
- /* Cr component */
- put_bits(&s->pb, 8, 3); /* component number */
- put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
- put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
-#ifdef TWOMATRIXES
- put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
-#else
- put_bits(&s->pb, 8, 0); /* select matrix */
-#endif
-
- /* scan header */
- put_marker(&s->pb, SOS);
- put_bits(&s->pb, 16, 12); /* length */
- put_bits(&s->pb, 8, 3); /* 3 components */
-
- /* Y component */
- put_bits(&s->pb, 8, 1); /* index */
- put_bits(&s->pb, 4, 0); /* DC huffman table index */
- put_bits(&s->pb, 4, 0); /* AC huffman table index */
-
- /* Cb component */
- put_bits(&s->pb, 8, 2); /* index */
- put_bits(&s->pb, 4, 1); /* DC huffman table index */
- put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
-
- /* Cr component */
- put_bits(&s->pb, 8, 3); /* index */
- put_bits(&s->pb, 4, 1); /* DC huffman table index */
- put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
-
- put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
-
- switch(s->avctx->codec_id){
- case AV_CODEC_ID_MJPEG: put_bits(&s->pb, 8, 63); break; /* Se (not used) */
- case AV_CODEC_ID_LJPEG: put_bits(&s->pb, 8, 0); break; /* not used */
- default: av_assert0(0);
- }
-
- put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
-
-end:
- s->esc_pos = put_bits_count(&s->pb) >> 3;
- for(i=1; i<s->slice_context_count; i++)
- s->thread_context[i]->esc_pos = 0;
-}
-
-static void escape_FF(MpegEncContext *s, int start)
-{
- int size= put_bits_count(&s->pb) - start*8;
- int i, ff_count;
- uint8_t *buf= s->pb.buf + start;
- int align= (-(size_t)(buf))&3;
-
- av_assert1((size&7) == 0);
- size >>= 3;
-
- ff_count=0;
- for(i=0; i<size && i<align; i++){
- if(buf[i]==0xFF) ff_count++;
- }
- for(; i<size-15; i+=16){
- int acc, v;
-
- v= *(uint32_t*)(&buf[i]);
- acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
- v= *(uint32_t*)(&buf[i+4]);
- acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
- v= *(uint32_t*)(&buf[i+8]);
- acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
- v= *(uint32_t*)(&buf[i+12]);
- acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
-
- acc>>=4;
- acc+= (acc>>16);
- acc+= (acc>>8);
- ff_count+= acc&0xFF;
- }
- for(; i<size; i++){
- if(buf[i]==0xFF) ff_count++;
- }
-
- if(ff_count==0) return;
-
- flush_put_bits(&s->pb);
- skip_put_bytes(&s->pb, ff_count);
-
- for(i=size-1; ff_count; i--){
- int v= buf[i];
-
- if(v==0xFF){
- buf[i+ff_count]= 0;
- ff_count--;
- }
-
- buf[i+ff_count]= v;
- }
-}
-
-void ff_mjpeg_encode_stuffing(MpegEncContext *s)
-{
- int length, i;
- PutBitContext *pbc = &s->pb;
- int mb_y = s->mb_y - !s->mb_x;
- length= (-put_bits_count(pbc))&7;
- if(length) put_bits(pbc, length, (1<<length)-1);
-
- flush_put_bits(&s->pb);
- escape_FF(s, s->esc_pos);
-
- if((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height)
- put_marker(pbc, RST0 + (mb_y&7));
- s->esc_pos = put_bits_count(pbc) >> 3;
-
- for(i=0; i<3; i++)
- s->last_dc[i] = 128 << s->intra_dc_precision;
-}
-
-void ff_mjpeg_encode_picture_trailer(MpegEncContext *s)
-{
-
- av_assert1((s->header_bits&7)==0);
-
-
- put_marker(&s->pb, EOI);
-}
-
-void ff_mjpeg_encode_dc(MpegEncContext *s, int val,
- uint8_t *huff_size, uint16_t *huff_code)
-{
- int mant, nbits;
-
- if (val == 0) {
- put_bits(&s->pb, huff_size[0], huff_code[0]);
- } else {
- mant = val;
- if (val < 0) {
- val = -val;
- mant--;
- }
-
- nbits= av_log2_16bit(val) + 1;
-
- put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
-
- put_sbits(&s->pb, nbits, mant);
- }
-}
-
-static void encode_block(MpegEncContext *s, int16_t *block, int n)
-{
- int mant, nbits, code, i, j;
- int component, dc, run, last_index, val;
- MJpegContext *m = s->mjpeg_ctx;
- uint8_t *huff_size_ac;
- uint16_t *huff_code_ac;
-
- /* DC coef */
- component = (n <= 3 ? 0 : (n&1) + 1);
- dc = block[0]; /* overflow is impossible */
- val = dc - s->last_dc[component];
- if (n < 4) {
- ff_mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
- huff_size_ac = m->huff_size_ac_luminance;
- huff_code_ac = m->huff_code_ac_luminance;
- } else {
- ff_mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
- huff_size_ac = m->huff_size_ac_chrominance;
- huff_code_ac = m->huff_code_ac_chrominance;
- }
- s->last_dc[component] = dc;
-
- /* AC coefs */
-
- run = 0;
- last_index = s->block_last_index[n];
- for(i=1;i<=last_index;i++) {
- j = s->intra_scantable.permutated[i];
- val = block[j];
- if (val == 0) {
- run++;
- } else {
- while (run >= 16) {
- put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
- run -= 16;
- }
- mant = val;
- if (val < 0) {
- val = -val;
- mant--;
- }
-
- nbits= av_log2(val) + 1;
- code = (run << 4) | nbits;
-
- put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
-
- put_sbits(&s->pb, nbits, mant);
- run = 0;
- }
- }
-
- /* output EOB only if not already 64 values */
- if (last_index < 63 || run != 0)
- put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
-}
-
-void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[6][64])
-{
- int i;
- if (s->chroma_format == CHROMA_444) {
- encode_block(s, block[0], 0);
- encode_block(s, block[2], 2);
- encode_block(s, block[4], 4);
- encode_block(s, block[8], 8);
- encode_block(s, block[5], 5);
- encode_block(s, block[9], 9);
-
- if (16*s->mb_x+8 < s->width) {
- encode_block(s, block[1], 1);
- encode_block(s, block[3], 3);
- encode_block(s, block[6], 6);
- encode_block(s, block[10], 10);
- encode_block(s, block[7], 7);
- encode_block(s, block[11], 11);
- }
- } else {
- for(i=0;i<5;i++) {
- encode_block(s, block[i], i);
- }
- if (s->chroma_format == CHROMA_420) {
- encode_block(s, block[5], 5);
- } else {
- encode_block(s, block[6], 6);
- encode_block(s, block[5], 5);
- encode_block(s, block[7], 7);
- }
- }
-
- s->i_tex_bits += get_bits_diff(s);
-}
-
-// maximum over s->mjpeg_vsample[i]
-#define V_MAX 2
-static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
- const AVFrame *pic_arg, int *got_packet)
-
-{
- MpegEncContext *s = avctx->priv_data;
- AVFrame pic = *pic_arg;
- int i;
-
- //CODEC_FLAG_EMU_EDGE have to be cleared
- if(s->avctx->flags & CODEC_FLAG_EMU_EDGE)
- return -1;
-
- //picture should be flipped upside-down
- for(i=0; i < 3; i++) {
- pic.data[i] += (pic.linesize[i] * (s->mjpeg_vsample[i] * (8 * s->mb_height -((s->height/V_MAX)&7)) - 1 ));
- pic.linesize[i] *= -1;
- }
- return ff_MPV_encode_picture(avctx, pkt, &pic, got_packet);
-}
-
-#if CONFIG_MJPEG_ENCODER
-AVCodec ff_mjpeg_encoder = {
- .name = "mjpeg",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_MJPEG,
- .priv_data_size = sizeof(MpegEncContext),
- .init = ff_MPV_encode_init,
- .encode2 = ff_MPV_encode_picture,
- .close = ff_MPV_encode_end,
- .capabilities = CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
- .pix_fmts = (const enum AVPixelFormat[]){
- AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE
- },
- .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
-};
-#endif
-#if CONFIG_AMV_ENCODER
-AVCodec ff_amv_encoder = {
- .name = "amv",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_AMV,
- .priv_data_size = sizeof(MpegEncContext),
- .init = ff_MPV_encode_init,
- .encode2 = amv_encode_picture,
- .close = ff_MPV_encode_end,
- .pix_fmts = (const enum AVPixelFormat[]){
- AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_NONE
- },
- .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
-};
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 16:50:09 +0000