split ljpeg encoder out of mjpeg.c

Originally committed as revision 9057 to svn://svn.ffmpeg.org/ffmpeg/trunk

6 files changed, 261 insertions, 182 deletions

diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index a63eec7516..1e473da18f 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -99,7 +99,7 @@ OBJS-$(CONFIG_INTERPLAY_VIDEO_DECODER) += interplayvideo.o
 OBJS-$(CONFIG_INTERPLAY_DPCM_DECODER)  += dpcm.o
 OBJS-$(CONFIG_JPEGLS_ENCODER)          += jpeglsenc.o jpegls.o
 OBJS-$(CONFIG_KMVC_DECODER)            += kmvc.o
-OBJS-$(CONFIG_LJPEG_ENCODER)           += mjpegenc.o mjpeg.o mpegvideo.o
+OBJS-$(CONFIG_LJPEG_ENCODER)           += ljpegenc.o mjpegenc.o mjpeg.o mpegvideo.o
 OBJS-$(CONFIG_LOCO_DECODER)            += loco.o
 OBJS-$(CONFIG_MACE3_DECODER)           += mace.o
 OBJS-$(CONFIG_MACE6_DECODER)           += mace.o
diff --git a/libavcodec/ljpegenc.c b/libavcodec/ljpegenc.c
new file mode 100644
index 0000000000..0c566a1aa0
--- /dev/null
+++ b/libavcodec/ljpegenc.c
@@ -0,0 +1,197 @@
+/*
+ * lossless JPEG encoder
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2003 Alex Beregszaszi
+ * Copyright (c) 2003-2004 Michael Niedermayer
+ *
+ * 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
+ *
+ * Support for external huffman table, various fixes (AVID workaround),
+ * aspecting, new decode_frame mechanism and apple mjpeg-b support
+ *                                  by Alex Beregszaszi
+ */
+
+/**
+ * @file ljpegenc.c
+ * lossless JPEG encoder.
+ */
+
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+#include "mjpeg.h"
+#include "mjpegenc.h"
+
+
+static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
+    MpegEncContext * const s = avctx->priv_data;
+    MJpegContext * const m = s->mjpeg_ctx;
+    AVFrame *pict = data;
+    const int width= s->width;
+    const int height= s->height;
+    AVFrame * const p= (AVFrame*)&s->current_picture;
+    const int predictor= avctx->prediction_method+1;
+
+    init_put_bits(&s->pb, buf, buf_size);
+
+    *p = *pict;
+    p->pict_type= FF_I_TYPE;
+    p->key_frame= 1;
+
+    mjpeg_picture_header(s);
+
+    s->header_bits= put_bits_count(&s->pb);
+
+    if(avctx->pix_fmt == PIX_FMT_RGB32){
+        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++) {
+                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)
+                        mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                    else
+                        mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                }
+            }
+        }
+    }else{
+        int mb_x, mb_y, i;
+        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];
+
+        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)
+                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                                else
+                                    mjpeg_encode_dc(s, (int8_t)(*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
+//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
+                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+
+                                if(i==0)
+                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
+                                else
+                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    emms_c();
+
+    mjpeg_picture_trailer(s);
+    s->picture_number++;
+
+    flush_put_bits(&s->pb);
+    return pbBufPtr(&s->pb) - s->pb.buf;
+//    return (put_bits_count(&f->pb)+7)/8;
+}
+
+
+AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
+    "ljpeg",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_LJPEG,
+    sizeof(MpegEncContext),
+    MPV_encode_init,
+    encode_picture_lossless,
+    MPV_encode_end,
+};
diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c
index 53aae5c287..8bf64920a3 100644
--- a/libavcodec/mjpegenc.c
+++ b/libavcodec/mjpegenc.c
@@ -37,23 +37,12 @@
 #include "dsputil.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
 
-typedef struct MJpegContext {
-    uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
-    uint16_t huff_code_dc_luminance[12];
-    uint8_t huff_size_dc_chrominance[12];
-    uint16_t huff_code_dc_chrominance[12];
-
-    uint8_t huff_size_ac_luminance[256];
-    uint16_t huff_code_ac_luminance[256];
-    uint8_t huff_size_ac_chrominance[256];
-    uint16_t huff_code_ac_chrominance[256];
-} MJpegContext;
-
 
 int mjpeg_init(MpegEncContext *s)
 {
@@ -365,7 +354,7 @@ void mjpeg_picture_trailer(MpegEncContext *s)
     put_marker(&s->pb, EOI);
 }
 
-static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
+void mjpeg_encode_dc(MpegEncContext *s, int val,
                                    uint8_t *huff_size, uint16_t *huff_code)
 {
     int mant, nbits;
@@ -460,162 +449,3 @@ void mjpeg_encode_mb(MpegEncContext *s,
         encode_block(s, block[7], 7);
     }
 }
-
-static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
-    MpegEncContext * const s = avctx->priv_data;
-    MJpegContext * const m = s->mjpeg_ctx;
-    AVFrame *pict = data;
-    const int width= s->width;
-    const int height= s->height;
-    AVFrame * const p= (AVFrame*)&s->current_picture;
-    const int predictor= avctx->prediction_method+1;
-
-    init_put_bits(&s->pb, buf, buf_size);
-
-    *p = *pict;
-    p->pict_type= FF_I_TYPE;
-    p->key_frame= 1;
-
-    mjpeg_picture_header(s);
-
-    s->header_bits= put_bits_count(&s->pb);
-
-    if(avctx->pix_fmt == PIX_FMT_RGB32){
-        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++) {
-                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)
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                    else
-                        mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                }
-            }
-        }
-    }else{
-        int mb_x, mb_y, i;
-        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];
-
-        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)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*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
-//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
-                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-
-                                if(i==0)
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
-                                else
-                                    mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    emms_c();
-
-    mjpeg_picture_trailer(s);
-    s->picture_number++;
-
-    flush_put_bits(&s->pb);
-    return pbBufPtr(&s->pb) - s->pb.buf;
-//    return (put_bits_count(&f->pb)+7)/8;
-}
-
-
-AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
-    "ljpeg",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_LJPEG,
-    sizeof(MpegEncContext),
-    MPV_encode_init,
-    encode_picture_lossless,
-    MPV_encode_end,
-};
diff --git a/libavcodec/mjpegenc.h b/libavcodec/mjpegenc.h
new file mode 100644
index 0000000000..12867bb224
--- /dev/null
+++ b/libavcodec/mjpegenc.h
@@ -0,0 +1,60 @@
+/*
+ * MJPEG encoder
+ * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2003 Alex Beregszaszi
+ * Copyright (c) 2003-2004 Michael Niedermayer
+ *
+ * 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
+ *
+ * Support for external huffman table, various fixes (AVID workaround),
+ * aspecting, new decode_frame mechanism and apple mjpeg-b support
+ *                                  by Alex Beregszaszi
+ */
+
+/**
+ * @file mjpegenc.h
+ * MJPEG encoder.
+ */
+
+#ifndef MJPEGENC_H
+#define MJPEGENC_H
+
+#include "dsputil.h"
+#include "mpegvideo.h"
+
+typedef struct MJpegContext {
+    uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
+    uint16_t huff_code_dc_luminance[12];
+    uint8_t huff_size_dc_chrominance[12];
+    uint16_t huff_code_dc_chrominance[12];
+
+    uint8_t huff_size_ac_luminance[256];
+    uint16_t huff_code_ac_luminance[256];
+    uint8_t huff_size_ac_chrominance[256];
+    uint16_t huff_code_ac_chrominance[256];
+} MJpegContext;
+
+int mjpeg_init(MpegEncContext *s);
+void mjpeg_close(MpegEncContext *s);
+void mjpeg_picture_header(MpegEncContext *s);
+void mjpeg_picture_trailer(MpegEncContext *s);
+void ff_mjpeg_stuffing(PutBitContext *pbc);
+void mjpeg_encode_dc(MpegEncContext *s, int val,
+                     uint8_t *huff_size, uint16_t *huff_code);
+void mjpeg_encode_mb(MpegEncContext *s, DCTELEM block[6][64]);
+
+#endif /* MJPEGENC_H */
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 755a506b11..7c5f2227fd 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -30,6 +30,7 @@
 #include "avcodec.h"
 #include "dsputil.h"
 #include "mpegvideo.h"
+#include "mjpegenc.h"
 #include "msmpeg4.h"
 #include "faandct.h"
 #include <limits.h>
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index 389694ca0b..5313edc62e 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -905,14 +905,5 @@ void ff_wmv2_encode_mb(MpegEncContext * s,
                        DCTELEM block[6][64],
                        int motion_x, int motion_y);
 
-/* mjpeg.c */
-int mjpeg_init(MpegEncContext *s);
-void mjpeg_close(MpegEncContext *s);
-void mjpeg_encode_mb(MpegEncContext *s,
-                     DCTELEM block[6][64]);
-void mjpeg_picture_header(MpegEncContext *s);
-void mjpeg_picture_trailer(MpegEncContext *s);
-void ff_mjpeg_stuffing(PutBitContext * pbc);
-
 #endif /* AVCODEC_MPEGVIDEO_H */