adding ffmpeg specific version

1 files changed, 236 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/ljpegenc.c b/ffmpeg1/libavcodec/ljpegenc.c
new file mode 100644
index 0000000..76c3cb9
--- /dev/null
+++ b/ffmpeg1/libavcodec/ljpegenc.c
@@ -0,0 +1,236 @@
+/*
+ * lossless JPEG 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
+ * lossless JPEG encoder.
+ */
+
+#include "avcodec.h"
+#include "internal.h"
+#include "mpegvideo.h"
+#include "mjpeg.h"
+#include "mjpegenc.h"
+
+
+static int encode_picture_lossless(AVCodecContext *avctx, AVPacket *pkt,
+                                   const AVFrame *pict, int *got_packet)
+{
+    MpegEncContext * const s = avctx->priv_data;
+    MJpegContext * const m = s->mjpeg_ctx;
+    const int width= s->width;
+    const int height= s->height;
+    AVFrame * const p = &s->current_picture.f;
+    const int predictor= avctx->prediction_method+1;
+    const int mb_width  = (width  + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
+    const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
+    int ret, max_pkt_size = FF_MIN_BUFFER_SIZE;
+
+    if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
+        max_pkt_size += width * height * 3 * 4;
+    else {
+        max_pkt_size += mb_width * mb_height * 3 * 4
+                        * s->mjpeg_hsample[0] * s->mjpeg_vsample[0];
+    }
+
+    if (!s->edge_emu_buffer &&
+        (ret = ff_mpv_frame_size_alloc(s, pict->linesize[0])) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "failed to allocate context scratch buffers.\n");
+        return ret;
+    }
+
+    if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size)) < 0)
+        return ret;
+
+    init_put_bits(&s->pb, pkt->data, pkt->size);
+
+    av_frame_unref(p);
+    ret = av_frame_ref(p, pict);
+    if (ret < 0)
+        return ret;
+    p->pict_type= AV_PICTURE_TYPE_I;
+    p->key_frame= 1;
+
+    ff_mjpeg_encode_picture_header(s);
+
+    s->header_bits= put_bits_count(&s->pb);
+
+    if(avctx->pix_fmt == AV_PIX_FMT_BGR0
+        || avctx->pix_fmt == AV_PIX_FMT_BGRA
+        || avctx->pix_fmt == AV_PIX_FMT_BGR24){
+        int x, y, i;
+        const int linesize= p->linesize[0];
+        uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
+        int left[3], top[3], topleft[3];
+
+        for(i=0; i<3; i++){
+            buffer[0][i]= 1 << (9 - 1);
+        }
+
+        for(y = 0; y < height; y++) {
+            const int modified_predictor= y ? predictor : 1;
+            uint8_t *ptr = p->data[0] + (linesize * y);
+
+            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
+                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+                return -1;
+            }
+
+            for(i=0; i<3; i++){
+                top[i]= left[i]= topleft[i]= buffer[0][i];
+            }
+            for(x = 0; x < width; x++) {
+                if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
+                    buffer[x][1] = ptr[3*x+0] - ptr[3*x+1] + 0x100;
+                    buffer[x][2] = ptr[3*x+2] - ptr[3*x+1] + 0x100;
+                    buffer[x][0] = (ptr[3*x+0] + 2*ptr[3*x+1] + ptr[3*x+2])>>2;
+                }else{
+                buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
+                buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
+                buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
+                }
+
+                for(i=0;i<3;i++) {
+                    int pred, diff;
+
+                    PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
+
+                    topleft[i]= top[i];
+                    top[i]= buffer[x+1][i];
+
+                    left[i]= buffer[x][i];
+
+                    diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
+
+                    if(i==0)
+                        ff_mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                    else
+                        ff_mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                }
+            }
+        }
+    }else{
+        int mb_x, mb_y, i;
+
+        for(mb_y = 0; mb_y < mb_height; mb_y++) {
+            if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
+                av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
+                return -1;
+            }
+            for(mb_x = 0; mb_x < mb_width; mb_x++) {
+                if(mb_x==0 || mb_y==0){
+                    for(i=0;i<3;i++) {
+                        uint8_t *ptr;
+                        int x, y, h, v, linesize;
+                        h = s->mjpeg_hsample[i];
+                        v = s->mjpeg_vsample[i];
+                        linesize= p->linesize[i];
+
+                        for(y=0; y<v; y++){
+                            for(x=0; x<h; x++){
+                                int pred;
+
+                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+                                if(y==0 && mb_y==0){
+                                    if(x==0 && mb_x==0){
+                                        pred= 128;
+                                    }else{
+                                        pred= ptr[-1];
+                                    }
+                                }else{
+                                    if(x==0 && mb_x==0){
+                                        pred= ptr[-linesize];
+                                    }else{
+                                        PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+                                    }
+                                }
+
+                                if(i==0)
+                                    ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                                else
+                                    ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                            }
+                        }
+                    }
+                }else{
+                    for(i=0;i<3;i++) {
+                        uint8_t *ptr;
+                        int x, y, h, v, linesize;
+                        h = s->mjpeg_hsample[i];
+                        v = s->mjpeg_vsample[i];
+                        linesize= p->linesize[i];
+
+                        for(y=0; y<v; y++){
+                            for(x=0; x<h; x++){
+                                int pred;
+
+                                ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+
+                                if(i==0)
+                                    ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                                else
+                                    ff_mjpeg_encode_dc(s, *ptr - pred, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    emms_c();
+    av_assert0(s->esc_pos == s->header_bits >> 3);
+    ff_mjpeg_encode_stuffing(s);
+    ff_mjpeg_encode_picture_trailer(s);
+    s->picture_number++;
+
+    flush_put_bits(&s->pb);
+    pkt->size   = put_bits_ptr(&s->pb) - s->pb.buf;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+
+    return 0;
+//    return (put_bits_count(&f->pb)+7)/8;
+}
+
+
+AVCodec ff_ljpeg_encoder = { //FIXME avoid MPV_* lossless JPEG should not need them
+    .name           = "ljpeg",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_LJPEG,
+    .priv_data_size = sizeof(MpegEncContext),
+    .init           = ff_MPV_encode_init,
+    .encode2        = encode_picture_lossless,
+    .close          = ff_MPV_encode_end,
+    .pix_fmts       = (const enum AVPixelFormat[]){
+        AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_BGR0,
+        AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
+        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
+        AV_PIX_FMT_NONE},
+    .long_name      = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
+};