Merge commit 'a030279a67ef883df8cf3707774656fa1be81078'
[ffmpeg.git] / libavcodec / mjpegdec.c
index 896fa99..9322ffe 100644 (file)
@@ -8,20 +8,20 @@
  * aspecting, new decode_frame mechanism and apple mjpeg-b support
  *                                  by Alex Beregszaszi
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * 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.
  *
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
  * MJPEG decoder.
  */
 
-// #define DEBUG
-#include <assert.h>
-
 #include "libavutil/imgutils.h"
+#include "libavutil/avassert.h"
 #include "libavutil/opt.h"
 #include "avcodec.h"
+#include "copy_block.h"
 #include "internal.h"
 #include "mjpeg.h"
 #include "mjpegdec.h"
@@ -51,7 +50,7 @@ static int build_vlc(VLC *vlc, const uint8_t *bits_table,
     uint16_t huff_sym[256];
     int i;
 
-    assert(nb_codes <= 256);
+    av_assert0(nb_codes <= 256);
 
     ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
 
@@ -87,6 +86,7 @@ av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
 
     if (!s->picture_ptr)
         s->picture_ptr = &s->picture;
+    avcodec_get_frame_defaults(&s->picture);
 
     s->avctx = avctx;
     ff_hpeldsp_init(&s->hdsp, avctx->flags);
@@ -96,24 +96,24 @@ av_cold int ff_mjpeg_decode_init(AVCodecContext *avctx)
     s->buffer        = NULL;
     s->start_code    = -1;
     s->first_picture = 1;
+    s->got_picture   = 0;
     s->org_height    = avctx->coded_height;
     avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
 
     build_basic_mjpeg_vlc(s);
 
     if (s->extern_huff) {
-        int ret;
-        av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
+        av_log(avctx, AV_LOG_INFO, "using external huffman table\n");
         init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
-        if ((ret = ff_mjpeg_decode_dht(s))) {
+        if (ff_mjpeg_decode_dht(s)) {
             av_log(avctx, AV_LOG_ERROR,
-                   "mjpeg: error using external huffman table\n");
-            return ret;
+                   "error using external huffman table, switching back to internal\n");
+            build_basic_mjpeg_vlc(s);
         }
     }
     if (avctx->field_order == AV_FIELD_BB) { /* quicktime icefloe 019 */
         s->interlace_polarity = 1;           /* bottom field first */
-        av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n");
+        av_log(avctx, AV_LOG_DEBUG, "bottom field first\n");
     }
     if (avctx->codec->id == AV_CODEC_ID_AMV)
         s->flipped = 1;
@@ -130,10 +130,10 @@ int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
     len = get_bits(&s->gb, 16) - 2;
 
     while (len >= 65) {
-        /* only 8 bit precision handled */
-        if (get_bits(&s->gb, 4) != 0) {
-            av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n");
-            return -1;
+        int pr = get_bits(&s->gb, 4);
+        if (pr > 1) {
+            av_log(s->avctx, AV_LOG_ERROR, "dqt: invalid precision\n");
+            return AVERROR_INVALIDDATA;
         }
         index = get_bits(&s->gb, 4);
         if (index >= 4)
@@ -142,7 +142,7 @@ int ff_mjpeg_decode_dqt(MJpegDecodeContext *s)
         /* read quant table */
         for (i = 0; i < 64; i++) {
             j = s->scantable.permutated[i];
-            s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
+            s->quant_matrixes[index][j] = get_bits(&s->gb, pr ? 16 : 8);
         }
 
         // XXX FIXME finetune, and perhaps add dc too
@@ -213,6 +213,11 @@ int ff_mjpeg_decode_dht(MJpegDecodeContext *s)
 int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
 {
     int len, nb_components, i, width, height, pix_fmt_id;
+    int h_count[MAX_COMPONENTS];
+    int v_count[MAX_COMPONENTS];
+
+    s->cur_scan = 0;
+    s->upscale_h = s->upscale_v = 0;
 
     /* XXX: verify len field validity */
     len     = get_bits(&s->gb, 16);
@@ -228,6 +233,11 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
         return -1;
     }
 
+    if(s->lossless && s->avctx->lowres){
+        av_log(s->avctx, AV_LOG_ERROR, "lowres is not possible with lossless jpeg\n");
+        return -1;
+    }
+
     height = get_bits(&s->gb, 16);
     width  = get_bits(&s->gb, 16);
 
@@ -243,6 +253,12 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
     if (nb_components <= 0 ||
         nb_components > MAX_COMPONENTS)
         return -1;
+    if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
+        if (nb_components != s->nb_components) {
+            av_log(s->avctx, AV_LOG_ERROR, "nb_components changing in interlaced picture\n");
+            return AVERROR_INVALIDDATA;
+        }
+    }
     if (s->ls && !(s->bits <= 8 || nb_components == 1)) {
         avpriv_report_missing_feature(s->avctx,
                                       "JPEG-LS that is not <= 8 "
@@ -252,28 +268,32 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
     s->nb_components = nb_components;
     s->h_max         = 1;
     s->v_max         = 1;
+    memset(h_count, 0, sizeof(h_count));
+    memset(v_count, 0, sizeof(v_count));
     for (i = 0; i < nb_components; i++) {
         /* component id */
         s->component_id[i] = get_bits(&s->gb, 8) - 1;
-        s->h_count[i]      = get_bits(&s->gb, 4);
-        s->v_count[i]      = get_bits(&s->gb, 4);
+        h_count[i]         = get_bits(&s->gb, 4);
+        v_count[i]         = get_bits(&s->gb, 4);
         /* compute hmax and vmax (only used in interleaved case) */
-        if (s->h_count[i] > s->h_max)
-            s->h_max = s->h_count[i];
-        if (s->v_count[i] > s->v_max)
-            s->v_max = s->v_count[i];
+        if (h_count[i] > s->h_max)
+            s->h_max = h_count[i];
+        if (v_count[i] > s->v_max)
+            s->v_max = v_count[i];
         s->quant_index[i] = get_bits(&s->gb, 8);
-        if (s->quant_index[i] >= 4)
+        if (s->quant_index[i] >= 4) {
+            av_log(s->avctx, AV_LOG_ERROR, "quant_index is invalid\n");
             return AVERROR_INVALIDDATA;
-        if (!s->h_count[i] || !s->v_count[i]) {
+        }
+        if (!h_count[i] || !v_count[i]) {
             av_log(s->avctx, AV_LOG_ERROR,
                    "Invalid sampling factor in component %d %d:%d\n",
-                   i, s->h_count[i], s->v_count[i]);
+                   i, h_count[i], v_count[i]);
             return AVERROR_INVALIDDATA;
         }
 
         av_log(s->avctx, AV_LOG_DEBUG, "component %d %d:%d id: %d quant:%d\n",
-               i, s->h_count[i], s->v_count[i],
+               i, h_count[i], v_count[i],
                s->component_id[i], s->quant_index[i]);
     }
 
@@ -282,15 +302,18 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
         return AVERROR_PATCHWELCOME;
     }
 
-    if (s->v_max == 1 && s->h_max == 1 && s->lossless == 1)
-        s->rgb = 1;
 
     /* if different size, realloc/alloc picture */
-    /* XXX: also check h_count and v_count */
-    if (width != s->width || height != s->height) {
+    if (   width != s->width || height != s->height
+        || memcmp(s->h_count, h_count, sizeof(h_count))
+        || memcmp(s->v_count, v_count, sizeof(v_count))) {
+
         s->width      = width;
         s->height     = height;
+        memcpy(s->h_count, h_count, sizeof(h_count));
+        memcpy(s->v_count, v_count, sizeof(v_count));
         s->interlaced = 0;
+        s->got_picture = 0;
 
         /* test interlaced mode */
         if (s->first_picture   &&
@@ -308,7 +331,16 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
         s->first_picture = 0;
     }
 
-    if (!(s->interlaced && (s->bottom_field == !s->interlace_polarity))) {
+    if (s->interlaced && (s->bottom_field == !s->interlace_polarity)) {
+        if (s->progressive) {
+            avpriv_request_sample(s->avctx, "progressively coded interlaced picture");
+            return AVERROR_INVALIDDATA;
+        }
+    } else{
+        if (s->v_max == 1 && s->h_max == 1 && s->lossless==1 && nb_components==3)
+            s->rgb = 1;
+        else if (!s->lossless)
+            s->rgb = 0;
     /* XXX: not complete test ! */
     pix_fmt_id = (s->h_count[0] << 28) | (s->v_count[0] << 24) |
                  (s->h_count[1] << 20) | (s->v_count[1] << 16) |
@@ -325,28 +357,90 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
     switch (pix_fmt_id) {
     case 0x11111100:
         if (s->rgb)
-            s->avctx->pix_fmt = AV_PIX_FMT_BGRA;
-        else
+            s->avctx->pix_fmt = AV_PIX_FMT_BGR24;
+        else {
+            if (s->component_id[0] == 'Q' && s->component_id[1] == 'F' && s->component_id[2] == 'A') {
+                s->avctx->pix_fmt = AV_PIX_FMT_GBR24P;
+            } else {
             s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
-        assert(s->nb_components == 3);
+            s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+            }
+        }
+        av_assert0(s->nb_components == 3);
+        break;
+    case 0x12121100:
+    case 0x22122100:
+        s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+        s->upscale_v = 2;
+        s->upscale_h = (pix_fmt_id == 0x22122100);
+        s->chroma_height = s->height;
+        break;
+    case 0x21211100:
+    case 0x22211200:
+        s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+        s->upscale_v = (pix_fmt_id == 0x22211200);
+        s->upscale_h = 2;
+        s->chroma_height = s->height;
+        break;
+    case 0x22221100:
+        s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+        s->upscale_v = 2;
+        s->upscale_h = 2;
+        s->chroma_height = s->height / 2;
         break;
     case 0x11000000:
-        s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
+    case 0x13000000:
+    case 0x14000000:
+    case 0x31000000:
+    case 0x33000000:
+    case 0x34000000:
+    case 0x41000000:
+    case 0x43000000:
+    case 0x44000000:
+        if(s->bits <= 8)
+            s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
+        else
+            s->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
         break;
     case 0x12111100:
+    case 0x22211100:
+    case 0x22112100:
         s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV440P : AV_PIX_FMT_YUVJ440P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+        s->upscale_h = (pix_fmt_id == 0x22211100) * 2 + (pix_fmt_id == 0x22112100);
+        s->chroma_height = s->height / 2;
         break;
     case 0x21111100:
         s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+        break;
+    case 0x22121100:
+    case 0x22111200:
+        s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUVJ422P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+        s->upscale_v = (pix_fmt_id == 0x22121100) + 1;
         break;
     case 0x22111100:
         s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUVJ420P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
+        break;
+    case 0x41111100:
+        s->avctx->pix_fmt = AV_PIX_FMT_YUV411P;
+        s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
         break;
     default:
         av_log(s->avctx, AV_LOG_ERROR, "Unhandled pixel format 0x%x\n", pix_fmt_id);
         return AVERROR_PATCHWELCOME;
     }
+    if ((s->upscale_h || s->upscale_v) && s->avctx->lowres) {
+        av_log(s->avctx, AV_LOG_ERROR, "lowres not supported for weird subsampling\n");
+        return AVERROR_PATCHWELCOME;
+    }
     if (s->ls) {
+        s->upscale_h = s->upscale_v = 0;
         if (s->nb_components > 1)
             s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
         else if (s->bits <= 8)
@@ -356,10 +450,8 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
     }
 
     av_frame_unref(s->picture_ptr);
-    if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0) {
-        av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+    if (ff_get_buffer(s->avctx, s->picture_ptr, AV_GET_BUFFER_FLAG_REF) < 0)
         return -1;
-    }
     s->picture_ptr->pict_type = AV_PICTURE_TYPE_I;
     s->picture_ptr->key_frame = 1;
     s->got_picture            = 1;
@@ -375,6 +467,11 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
         av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len);
     }
 
+    if (s->rgb && !s->lossless && !s->ls) {
+        av_log(s->avctx, AV_LOG_ERROR, "Unsupported coding and pixel format combination\n");
+        return AVERROR_PATCHWELCOME;
+    }
+
     /* totally blank picture as progressive JPEG will only add details to it */
     if (s->progressive) {
         int bw = (width  + s->h_max * 8 - 1) / (s->h_max * 8);
@@ -639,25 +736,57 @@ static int decode_block_refinement(MJpegDecodeContext *s, int16_t *block,
 #undef REFINE_BIT
 #undef ZERO_RUN
 
-static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
-                                 int point_transform)
+static void handle_rstn(MJpegDecodeContext *s, int nb_components)
+{
+    int i;
+    if (s->restart_interval) {
+        s->restart_count--;
+        if(s->restart_count == 0 && s->avctx->codec_id == AV_CODEC_ID_THP){
+            align_get_bits(&s->gb);
+            for (i = 0; i < nb_components; i++) /* reset dc */
+                s->last_dc[i] = 1024;
+        }
+
+        i = 8 + ((-get_bits_count(&s->gb)) & 7);
+        /* skip RSTn */
+        if (s->restart_count == 0) {
+            if(   show_bits(&s->gb, i) == (1 << i) - 1
+               || show_bits(&s->gb, i) == 0xFF) {
+                int pos = get_bits_count(&s->gb);
+                align_get_bits(&s->gb);
+                while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
+                    skip_bits(&s->gb, 8);
+                if (get_bits_left(&s->gb) >= 8 && (get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
+                    for (i = 0; i < nb_components; i++) /* reset dc */
+                        s->last_dc[i] = 1024;
+                } else
+                    skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
+            }
+        }
+    }
+}
+
+static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int nb_components, int predictor, int point_transform)
 {
     int i, mb_x, mb_y;
     uint16_t (*buffer)[4];
     int left[3], top[3], topleft[3];
     const int linesize = s->linesize[0];
     const int mask     = (1 << s->bits) - 1;
+    int resync_mb_y = 0;
+    int resync_mb_x = 0;
+
+    s->restart_count = s->restart_interval;
 
     av_fast_malloc(&s->ljpeg_buffer, &s->ljpeg_buffer_size,
                    (unsigned)s->mb_width * 4 * sizeof(s->ljpeg_buffer[0][0]));
     buffer = s->ljpeg_buffer;
 
     for (i = 0; i < 3; i++)
-        buffer[0][i] = 1 << (s->bits + point_transform - 1);
+        buffer[0][i] = 1 << (s->bits - 1);
 
     for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
-        const int modified_predictor = mb_y ? predictor : 1;
-        uint8_t *ptr = s->picture_ptr->data[0] + (linesize * mb_y);
+        uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
 
         if (s->interlaced && s->bottom_field)
             ptr += linesize >> 1;
@@ -666,19 +795,32 @@ static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
             top[i] = left[i] = topleft[i] = buffer[0][i];
 
         for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
-            if (s->restart_interval && !s->restart_count)
+            int modified_predictor = predictor;
+
+            if (s->restart_interval && !s->restart_count){
                 s->restart_count = s->restart_interval;
+                resync_mb_x = mb_x;
+                resync_mb_y = mb_y;
+                for(i=0; i<3; i++)
+                    top[i] = left[i]= topleft[i]= 1 << (s->bits - 1);
+            }
+            if (mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || !mb_x)
+                modified_predictor = 1;
 
-            for (i = 0; i < 3; i++) {
-                int pred;
+            for (i=0;i<nb_components;i++) {
+                int pred, dc;
 
                 topleft[i] = top[i];
                 top[i]     = buffer[mb_x][i];
 
                 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
 
+                dc = mjpeg_decode_dc(s, s->dc_index[i]);
+                if(dc == 0xFFFF)
+                    return -1;
+
                 left[i] = buffer[mb_x][i] =
-                    mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
+                    mask & (pred + (dc << point_transform));
             }
 
             if (s->restart_interval && !--s->restart_count) {
@@ -689,21 +831,22 @@ static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor,
 
         if (s->rct) {
             for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
-                ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
-                ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
-                ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
+                ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200) >> 2);
+                ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
+                ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
             }
         } else if (s->pegasus_rct) {
             for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
-                ptr[4 * mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
-                ptr[4 * mb_x + 0] = buffer[mb_x][1] + ptr[4 * mb_x + 1];
-                ptr[4 * mb_x + 2] = buffer[mb_x][2] + ptr[4 * mb_x + 1];
+                ptr[3*mb_x + 1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2]) >> 2);
+                ptr[3*mb_x + 0] = buffer[mb_x][1] + ptr[3*mb_x + 1];
+                ptr[3*mb_x + 2] = buffer[mb_x][2] + ptr[3*mb_x + 1];
             }
         } else {
-            for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
-                ptr[4 * mb_x + 0] = buffer[mb_x][2];
-                ptr[4 * mb_x + 1] = buffer[mb_x][1];
-                ptr[4 * mb_x + 2] = buffer[mb_x][0];
+            for(i=0; i<nb_components; i++) {
+                int c= s->comp_index[i];
+                for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
+                    ptr[3*mb_x+2-c] = buffer[mb_x][i];
+                }
             }
         }
     }
@@ -714,47 +857,86 @@ static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
                                  int point_transform, int nb_components)
 {
     int i, mb_x, mb_y;
+    int bits= (s->bits+7)&~7;
+    int resync_mb_y = 0;
+    int resync_mb_x = 0;
+
+    point_transform += bits - s->bits;
+
+    av_assert0(nb_components>=1 && nb_components<=3);
 
     for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
         for (mb_x = 0; mb_x < s->mb_width; mb_x++) {
-            if (s->restart_interval && !s->restart_count)
+            if (s->restart_interval && !s->restart_count){
                 s->restart_count = s->restart_interval;
+                resync_mb_x = mb_x;
+                resync_mb_y = mb_y;
+            }
 
-            if (mb_x == 0 || mb_y == 0 || s->interlaced) {
+            if(!mb_x || mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x || s->interlaced){
+                int toprow  = mb_y == resync_mb_y || mb_y == resync_mb_y+1 && mb_x < resync_mb_x;
+                int leftcol = !mb_x || mb_y == resync_mb_y && mb_x == resync_mb_x;
                 for (i = 0; i < nb_components; i++) {
                     uint8_t *ptr;
+                    uint16_t *ptr16;
                     int n, h, v, x, y, c, j, linesize;
-                    n        = s->nb_blocks[i];
-                    c        = s->comp_index[i];
-                    h        = s->h_scount[i];
-                    v        = s->v_scount[i];
-                    x        = 0;
-                    y        = 0;
-                    linesize = s->linesize[c];
-
-                    for (j = 0; j < n; j++) {
-                        int pred;
-                        // FIXME optimize this crap
-                        ptr = s->picture_ptr->data[c] +
-                              (linesize * (v * mb_y + y)) +
-                              (h * mb_x + x);
-                        if (y == 0 && mb_y == 0) {
-                            if (x == 0 && mb_x == 0)
-                                pred = 128 << point_transform;
-                            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);
-                       }
+                    n = s->nb_blocks[i];
+                    c = s->comp_index[i];
+                    h = s->h_scount[i];
+                    v = s->v_scount[i];
+                    x = 0;
+                    y = 0;
+                    linesize= s->linesize[c];
+
+                    if(bits>8) linesize /= 2;
+
+                    for(j=0; j<n; j++) {
+                        int pred, dc;
+
+                        dc = mjpeg_decode_dc(s, s->dc_index[i]);
+                        if(dc == 0xFFFF)
+                            return -1;
+                        if(bits<=8){
+                        ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
+                        if(y==0 && toprow){
+                            if(x==0 && leftcol){
+                                pred= 1 << (bits - 1);
+                            }else{
+                                pred= ptr[-1];
+                            }
+                        }else{
+                            if(x==0 && leftcol){
+                                pred= ptr[-linesize];
+                            }else{
+                                PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+                            }
+                        }
 
                         if (s->interlaced && s->bottom_field)
                             ptr += linesize >> 1;
-                        *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
+                        pred &= (-1)<<(8-s->bits);
+                        *ptr= pred + (dc << point_transform);
+                        }else{
+                            ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
+                            if(y==0 && toprow){
+                                if(x==0 && leftcol){
+                                    pred= 1 << (bits - 1);
+                                }else{
+                                    pred= ptr16[-1];
+                                }
+                            }else{
+                                if(x==0 && leftcol){
+                                    pred= ptr16[-linesize];
+                                }else{
+                                    PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
+                                }
+                            }
 
+                            if (s->interlaced && s->bottom_field)
+                                ptr16 += linesize >> 1;
+                            pred &= (-1)<<(16-s->bits);
+                            *ptr16= pred + (dc << point_transform);
+                        }
                         if (++x == h) {
                             x = 0;
                             y++;
@@ -764,7 +946,8 @@ static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
             } else {
                 for (i = 0; i < nb_components; i++) {
                     uint8_t *ptr;
-                    int n, h, v, x, y, c, j, linesize;
+                    uint16_t *ptr16;
+                    int n, h, v, x, y, c, j, linesize, dc;
                     n        = s->nb_blocks[i];
                     c        = s->comp_index[i];
                     h        = s->h_scount[i];
@@ -773,16 +956,30 @@ static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
                     y        = 0;
                     linesize = s->linesize[c];
 
+                    if(bits>8) linesize /= 2;
+
                     for (j = 0; j < n; j++) {
                         int pred;
 
-                        // FIXME optimize this crap
-                        ptr = s->picture_ptr->data[c] +
+                        dc = mjpeg_decode_dc(s, s->dc_index[i]);
+                        if(dc == 0xFFFF)
+                            return -1;
+                        if(bits<=8){
+                            ptr = s->picture.data[c] +
                               (linesize * (v * mb_y + y)) +
-                              (h * mb_x + x);
-                        PREDICT(pred, ptr[-linesize - 1],
-                                ptr[-linesize], ptr[-1], predictor);
-                        *ptr = pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
+                              (h * mb_x + x); //FIXME optimize this crap
+                            PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
+
+                            pred &= (-1)<<(8-s->bits);
+                            *ptr = pred + (dc << point_transform);
+                        }else{
+                            ptr16 = (uint16_t*)(s->picture.data[c] + 2*(linesize * (v * mb_y + y)) + 2*(h * mb_x + x)); //FIXME optimize this crap
+                            PREDICT(pred, ptr16[-linesize-1], ptr16[-linesize], ptr16[-1], predictor);
+
+                            pred &= (-1)<<(16-s->bits);
+                            *ptr16= pred + (dc << point_transform);
+                        }
+
                         if (++x == h) {
                             x = 0;
                             y++;
@@ -799,6 +996,22 @@ static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor,
     return 0;
 }
 
+static av_always_inline void mjpeg_copy_block(MJpegDecodeContext *s,
+                                              uint8_t *dst, const uint8_t *src,
+                                              int linesize, int lowres)
+{
+    switch (lowres) {
+    case 0: s->hdsp.put_pixels_tab[1][0](dst, src, linesize, 8);
+        break;
+    case 1: copy_block4(dst, src, linesize, linesize, 4);
+        break;
+    case 2: copy_block2(dst, src, linesize, linesize, 2);
+        break;
+    case 3: *dst = *src;
+        break;
+    }
+}
+
 static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
                              int Al, const uint8_t *mb_bitmask,
                              const AVFrame *reference)
@@ -812,9 +1025,8 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
     if (mb_bitmask)
         init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
 
-    if (s->flipped && s->avctx->flags & CODEC_FLAG_EMU_EDGE) {
-        av_log(s->avctx, AV_LOG_ERROR,
-               "Can not flip image with CODEC_FLAG_EMU_EDGE set!\n");
+    if (s->flipped && s->avctx->lowres) {
+        av_log(s->avctx, AV_LOG_ERROR, "Can not flip image with lowres\n");
         s->flipped = 0;
     }
 
@@ -824,7 +1036,7 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
         reference_data[c] = reference ? reference->data[c] : NULL;
         linesize[c] = s->linesize[c];
         s->coefs_finished[c] |= 1;
-        if (s->flipped) {
+        if (s->flipped && !(s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
             // picture should be flipped upside-down for this codec
             int offset = (linesize[c] * (s->v_scount[i] *
                          (8 * s->mb_height - ((s->height / s->v_max) & 7)) - 1));
@@ -857,17 +1069,17 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
                 x = 0;
                 y = 0;
                 for (j = 0; j < n; j++) {
-                    block_offset = ((linesize[c] * (v * mb_y + y) * 8) +
-                                    (h * mb_x + x) * 8);
+                    block_offset = (((linesize[c] * (v * mb_y + y) * 8) +
+                                     (h * mb_x + x) * 8) >> s->avctx->lowres);
 
                     if (s->interlaced && s->bottom_field)
                         block_offset += linesize[c] >> 1;
                     ptr = data[c] + block_offset;
                     if (!s->progressive) {
                         if (copy_mb)
-                            s->hdsp.put_pixels_tab[1][0](ptr,
-                                reference_data[c] + block_offset,
-                                linesize[c], 8);
+                            mjpeg_copy_block(s, ptr, reference_data[c] + block_offset,
+                                             linesize[c], s->avctx->lowres);
+
                         else {
                             s->dsp.clear_block(s->block);
                             if (decode_block(s, s->block, i,
@@ -905,67 +1117,48 @@ static int mjpeg_decode_scan(MJpegDecodeContext *s, int nb_components, int Ah,
                 }
             }
 
-            if (s->restart_interval) {
-                s->restart_count--;
-                i = 8 + ((-get_bits_count(&s->gb)) & 7);
-                /* skip RSTn */
-                if (show_bits(&s->gb, i) == (1 << i) - 1) {
-                    int pos = get_bits_count(&s->gb);
-                    align_get_bits(&s->gb);
-                    while (get_bits_left(&s->gb) >= 8 && show_bits(&s->gb, 8) == 0xFF)
-                        skip_bits(&s->gb, 8);
-                    if ((get_bits(&s->gb, 8) & 0xF8) == 0xD0) {
-                        for (i = 0; i < nb_components; i++) /* reset dc */
-                            s->last_dc[i] = 1024;
-                    } else
-                        skip_bits_long(&s->gb, pos - get_bits_count(&s->gb));
-                }
-            }
+            handle_rstn(s, nb_components);
         }
     }
     return 0;
 }
 
 static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
-                                            int se, int Ah, int Al,
-                                            const uint8_t *mb_bitmask,
-                                            const AVFrame *reference)
+                                            int se, int Ah, int Al)
 {
     int mb_x, mb_y;
     int EOBRUN = 0;
     int c = s->comp_index[0];
-    uint8_t *data = s->picture_ptr->data[c];
-    const uint8_t *reference_data = reference ? reference->data[c] : NULL;
+    uint8_t *data = s->picture.data[c];
     int linesize  = s->linesize[c];
     int last_scan = 0;
     int16_t *quant_matrix = s->quant_matrixes[s->quant_index[c]];
-    GetBitContext mb_bitmask_gb;
 
-    if (mb_bitmask)
-        init_get_bits(&mb_bitmask_gb, mb_bitmask, s->mb_width * s->mb_height);
+    if (se > 63) {
+        av_log(s->avctx, AV_LOG_ERROR, "SE %d is too large\n", se);
+        return AVERROR_INVALIDDATA;
+    }
 
     if (!Al) {
         s->coefs_finished[c] |= (1LL << (se + 1)) - (1LL << ss);
         last_scan = !~s->coefs_finished[c];
     }
 
-    if (s->interlaced && s->bottom_field) {
-        int offset      = linesize >> 1;
-        data           += offset;
-        reference_data += offset;
-    }
+    if (s->interlaced && s->bottom_field)
+        data += linesize >> 1;
+
+    s->restart_count = 0;
 
     for (mb_y = 0; mb_y < s->mb_height; mb_y++) {
-        int block_offset = mb_y * linesize * 8;
-        uint8_t *ptr     = data + block_offset;
+        uint8_t *ptr     = data + (mb_y * linesize * 8 >> s->avctx->lowres);
         int block_idx    = mb_y * s->block_stride[c];
         int16_t (*block)[64] = &s->blocks[c][block_idx];
         uint8_t *last_nnz    = &s->last_nnz[c][block_idx];
         for (mb_x = 0; mb_x < s->mb_width; mb_x++, block++, last_nnz++) {
-            const int copy_mb = mb_bitmask && !get_bits1(&mb_bitmask_gb);
-
-            if (!copy_mb) {
                 int ret;
+                if (s->restart_interval && !s->restart_count)
+                    s->restart_count = s->restart_interval;
+
                 if (Ah)
                     ret = decode_block_refinement(s, *block, last_nnz, s->ac_index[0],
                                                   quant_matrix, ss, se, Al, &EOBRUN);
@@ -977,18 +1170,12 @@ static int mjpeg_decode_scan_progressive_ac(MJpegDecodeContext *s, int ss,
                            "error y=%d x=%d\n", mb_y, mb_x);
                     return AVERROR_INVALIDDATA;
                 }
-            }
 
             if (last_scan) {
-                if (copy_mb) {
-                    s->hdsp.put_pixels_tab[1][0](ptr,
-                                                 reference_data + block_offset,
-                                                 linesize, 8);
-                } else {
                     s->dsp.idct_put(ptr, linesize, *block);
-                    ptr += 8;
-                }
+                    ptr += 8 >> s->avctx->lowres;
             }
+            handle_rstn(s, 0);
         }
     }
     return 0;
@@ -1002,6 +1189,13 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
     const int block_size = s->lossless ? 1 : 8;
     int ilv, prev_shift;
 
+    if (!s->got_picture) {
+        av_log(s->avctx, AV_LOG_WARNING,
+                "Can not process SOS before SOF, skipping\n");
+        return -1;
+    }
+
+    av_assert0(s->picture_ptr->data[0]);
     /* XXX: verify len field validity */
     len = get_bits(&s->gb, 16);
     nb_components = get_bits(&s->gb, 8);
@@ -1031,6 +1225,11 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
             && nb_components == 3 && s->nb_components == 3 && i)
             index = 3 - i;
 
+        if(nb_components == 3 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
+            index = (i+2)%3;
+        if(nb_components == 1 && s->nb_components == 3 && s->avctx->pix_fmt == AV_PIX_FMT_GBR24P)
+            index = (index+2)%3;
+
         s->comp_index[i] = index;
 
         s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
@@ -1043,15 +1242,17 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
         if (s->dc_index[i] <  0 || s->ac_index[i] < 0 ||
             s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
             goto out_of_range;
-        if (!s->vlcs[0][s->dc_index[i]].table ||
-            !s->vlcs[1][s->ac_index[i]].table)
+        if (!s->vlcs[0][s->dc_index[i]].table || !(s->progressive ? s->vlcs[2][s->ac_index[0]].table : s->vlcs[1][s->ac_index[i]].table))
             goto out_of_range;
     }
 
     predictor = get_bits(&s->gb, 8);       /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
     ilv = get_bits(&s->gb, 8);             /* JPEG Se / JPEG-LS ILV */
-    prev_shift      = get_bits(&s->gb, 4); /* Ah */
-    point_transform = get_bits(&s->gb, 4); /* Al */
+    if(s->avctx->codec_tag != AV_RL32("CJPG")){
+        prev_shift      = get_bits(&s->gb, 4); /* Ah */
+        point_transform = get_bits(&s->gb, 4); /* Al */
+    }else
+        prev_shift = point_transform = 0;
 
     if (nb_components > 1) {
         /* interleaved stream */
@@ -1068,10 +1269,10 @@ int ff_mjpeg_decode_sos(MJpegDecodeContext *s, const uint8_t *mb_bitmask,
     }
 
     if (s->avctx->debug & FF_DEBUG_PICT_INFO)
-        av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n",
+        av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d skip:%d %s comp:%d\n",
                s->lossless ? "lossless" : "sequential DCT", s->rgb ? "RGB" : "",
-               predictor, point_transform, ilv, s->bits,
-               s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
+               predictor, point_transform, ilv, s->bits, s->mjpb_skiptosod,
+               s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""), nb_components);
 
 
     /* mjpeg-b can have padding bytes between sos and image data, skip them */
@@ -1083,6 +1284,7 @@ next_field:
         s->last_dc[i] = 1024;
 
     if (s->lossless) {
+        av_assert0(s->picture_ptr == &s->picture);
         if (CONFIG_JPEGLS_DECODER && s->ls) {
 //            for () {
 //            reset_ls_coding_parameters(s, 0);
@@ -1092,8 +1294,7 @@ next_field:
                 return ret;
         } else {
             if (s->rgb) {
-                if ((ret = ljpeg_decode_rgb_scan(s, predictor,
-                                                 point_transform)) < 0)
+                if ((ret = ljpeg_decode_rgb_scan(s, nb_components, predictor, point_transform)) < 0)
                     return ret;
             } else {
                 if ((ret = ljpeg_decode_yuv_scan(s, predictor,
@@ -1104,11 +1305,10 @@ next_field:
         }
     } else {
         if (s->progressive && predictor) {
+            av_assert0(s->picture_ptr == &s->picture);
             if ((ret = mjpeg_decode_scan_progressive_ac(s, predictor,
                                                         ilv, prev_shift,
-                                                        point_transform,
-                                                        mb_bitmask,
-                                                        reference)) < 0)
+                                                        point_transform)) < 0)
                 return ret;
         } else {
             if ((ret = mjpeg_decode_scan(s, nb_components,
@@ -1124,7 +1324,7 @@ next_field:
         GetBitContext bak = s->gb;
         align_get_bits(&bak);
         if (show_bits(&bak, 16) == 0xFFD1) {
-            av_dlog(s->avctx, "AVRn interlaced picture marker found\n");
+            av_log(s->avctx, AV_LOG_DEBUG, "AVRn interlaced picture marker found\n");
             s->gb = bak;
             skip_bits(&s->gb, 16);
             s->bottom_field ^= 1;
@@ -1163,7 +1363,6 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
         return AVERROR_INVALIDDATA;
 
     id   = get_bits_long(&s->gb, 32);
-    id   = av_be2ne32(id);
     len -= 6;
 
     if (s->avctx->debug & FF_DEBUG_STARTCODE)
@@ -1172,7 +1371,7 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
     /* Buggy AVID, it puts EOI only at every 10th frame. */
     /* Also, this fourcc is used by non-avid files too, it holds some
        information, but it's always present in AVID-created files. */
-    if (id == AV_RL32("AVI1")) {
+    if (id == AV_RB32("AVI1")) {
         /* structure:
             4bytes      AVI1
             1bytes      polarity
@@ -1180,12 +1379,9 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
             4bytes      field_size
             4bytes      field_size_less_padding
         */
-        s->buggy_avid = 1;
-        i = get_bits(&s->gb, 8);
-        if (i == 2)
-            s->bottom_field = 1;
-        else if (i == 1)
-            s->bottom_field = 0;
+            s->buggy_avid = 1;
+        i = get_bits(&s->gb, 8); len--;
+        av_log(s->avctx, AV_LOG_DEBUG, "polarity %d\n", i);
 #if 0
         skip_bits(&s->gb, 8);
         skip_bits(&s->gb, 32);
@@ -1197,7 +1393,7 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
 
 //    len -= 2;
 
-    if (id == AV_RL32("JFIF")) {
+    if (id == AV_RB32("JFIF")) {
         int t_w, t_h, v1, v2;
         skip_bits(&s->gb, 8); /* the trailing zero-byte */
         v1 = get_bits(&s->gb, 8);
@@ -1225,7 +1421,7 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
         goto out;
     }
 
-    if (id == AV_RL32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
+    if (id == AV_RB32("Adob") && (get_bits(&s->gb, 8) == 'e')) {
         if (s->avctx->debug & FF_DEBUG_PICT_INFO)
             av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
         skip_bits(&s->gb, 16); /* version */
@@ -1236,14 +1432,14 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
         goto out;
     }
 
-    if (id == AV_RL32("LJIF")) {
+    if (id == AV_RB32("LJIF")) {
         if (s->avctx->debug & FF_DEBUG_PICT_INFO)
             av_log(s->avctx, AV_LOG_INFO,
                    "Pegasus lossless jpeg header found\n");
         skip_bits(&s->gb, 16); /* version ? */
-        skip_bits(&s->gb, 16); /* unknwon always 0? */
-        skip_bits(&s->gb, 16); /* unknwon always 0? */
-        skip_bits(&s->gb, 16); /* unknwon always 0? */
+        skip_bits(&s->gb, 16); /* unknown always 0? */
+        skip_bits(&s->gb, 16); /* unknown always 0? */
+        skip_bits(&s->gb, 16); /* unknown always 0? */
         switch (get_bits(&s->gb, 8)) {
         case 1:
             s->rgb         = 1;
@@ -1263,10 +1459,9 @@ static int mjpeg_decode_app(MJpegDecodeContext *s)
     /* Apple MJPEG-A */
     if ((s->start_code == APP1) && (len > (0x28 - 8))) {
         id   = get_bits_long(&s->gb, 32);
-        id   = av_be2ne32(id);
         len -= 4;
         /* Apple MJPEG-A */
-        if (id == AV_RL32("mjpg")) {
+        if (id == AV_RB32("mjpg")) {
 #if 0
             skip_bits(&s->gb, 32); /* field size */
             skip_bits(&s->gb, 32); /* pad field size */
@@ -1308,15 +1503,17 @@ static int mjpeg_decode_com(MJpegDecodeContext *s)
                 cbuf[i] = 0;
 
             if (s->avctx->debug & FF_DEBUG_PICT_INFO)
-                av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
+                av_log(s->avctx, AV_LOG_INFO, "comment: '%s'\n", cbuf);
 
             /* buggy avid, it puts EOI only at every 10th frame */
-            if (!strcmp(cbuf, "AVID")) {
+            if (!strncmp(cbuf, "AVID", 4)) {
                 s->buggy_avid = 1;
+                if (len > 14 && cbuf[12] == 1) /* 1 - NTSC, 2 - PAL */
+                    s->interlace_polarity = 1;
             } else if (!strcmp(cbuf, "CS=ITU601"))
                 s->cs_itu601 = 1;
-            else if ((len > 20 && !strncmp(cbuf, "Intel(R) JPEG Library", 21)) ||
-                     (len > 19 && !strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
+            else if ((!strncmp(cbuf, "Intel(R) JPEG Library, version 1", 32)) ||
+                     (!strncmp(cbuf, "Metasoft MJPEG Codec", 20)))
                 s->flipped = 1;
 
             av_free(cbuf);
@@ -1333,9 +1530,7 @@ static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
     const uint8_t *buf_ptr;
     unsigned int v, v2;
     int val;
-#ifdef DEBUG
     int skipped = 0;
-#endif
 
     buf_ptr = *pbuf_ptr;
     while (buf_ptr < buf_end) {
@@ -1345,9 +1540,7 @@ static int find_marker(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
             val = *buf_ptr++;
             goto found;
         }
-#ifdef DEBUG
         skipped++;
-#endif
     }
     val = -1;
 found:
@@ -1412,7 +1605,7 @@ int ff_mjpeg_find_marker(MJpegDecodeContext *s,
                 while ((src + t < buf_end) && x == 0xff)
                     x = src[t++];
                 if (x & 0x80) {
-                    t -= 2;
+                    t -= FFMIN(2, t);
                     break;
                 }
             }
@@ -1452,11 +1645,12 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     MJpegDecodeContext *s = avctx->priv_data;
     const uint8_t *buf_end, *buf_ptr;
     const uint8_t *unescaped_buf_ptr;
+    int hshift, vshift;
     int unescaped_buf_size;
     int start_code;
+    int i, index;
     int ret = 0;
 
-    s->got_picture = 0; // picture from previous image can not be reused
     buf_ptr = buf;
     buf_end = buf + buf_size;
     while (buf_ptr < buf_end) {
@@ -1467,15 +1661,17 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
         /* EOF */
         if (start_code < 0) {
             goto the_end;
-        } else if (unescaped_buf_size > (1U<<29)) {
+        } else if (unescaped_buf_size > (1U<<28)) {
             av_log(avctx, AV_LOG_ERROR, "MJPEG packet 0x%x too big (0x%x/0x%x), corrupt data?\n",
                    start_code, unescaped_buf_size, buf_size);
             return AVERROR_INVALIDDATA;
         } else {
             av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
                    start_code, buf_end - buf_ptr);
-
-            init_get_bits(&s->gb, unescaped_buf_ptr, unescaped_buf_size * 8);
+            if ((ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size)) < 0) {
+                av_log(avctx, AV_LOG_ERROR, "invalid buffer\n");
+                goto fail;
+            }
 
             s->start_code = start_code;
             if (s->avctx->debug & FF_DEBUG_STARTCODE)
@@ -1492,6 +1688,8 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
             else if (start_code == COM)
                 mjpeg_decode_com(s);
 
+            ret = -1;
+
             if (!CONFIG_JPEGLS_DECODER &&
                 (start_code == SOF48 || start_code == LSE)) {
                 av_log(avctx, AV_LOG_ERROR, "JPEG-LS support not enabled.\n");
@@ -1510,7 +1708,7 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
             case DHT:
                 if ((ret = ff_mjpeg_decode_dht(s)) < 0) {
                     av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n");
-                    return ret;
+                    goto fail;
                 }
                 break;
             case SOF0:
@@ -1519,39 +1717,37 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                 s->ls          = 0;
                 s->progressive = 0;
                 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
-                    return ret;
+                    goto fail;
                 break;
             case SOF2:
                 s->lossless    = 0;
                 s->ls          = 0;
                 s->progressive = 1;
                 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
-                    return ret;
+                    goto fail;
                 break;
             case SOF3:
                 s->lossless    = 1;
                 s->ls          = 0;
                 s->progressive = 0;
                 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
-                    return ret;
+                    goto fail;
                 break;
             case SOF48:
                 s->lossless    = 1;
                 s->ls          = 1;
                 s->progressive = 0;
                 if ((ret = ff_mjpeg_decode_sof(s)) < 0)
-                    return ret;
+                    goto fail;
                 break;
             case LSE:
                 if (!CONFIG_JPEGLS_DECODER ||
                     (ret = ff_jpegls_decode_lse(s)) < 0)
-                    return ret;
+                    goto fail;
                 break;
             case EOI:
-                s->cur_scan = 0;
-                if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
-                    break;
 eoi_parser:
+                s->cur_scan = 0;
                 if (!s->got_picture) {
                     av_log(avctx, AV_LOG_WARNING,
                            "Found EOI before any SOF, ignoring\n");
@@ -1561,34 +1757,33 @@ eoi_parser:
                     s->bottom_field ^= 1;
                     /* if not bottom field, do not output image yet */
                     if (s->bottom_field == !s->interlace_polarity)
-                        goto not_the_end;
+                        break;
                 }
                 if ((ret = av_frame_ref(data, s->picture_ptr)) < 0)
                     return ret;
                 *got_frame = 1;
+                s->got_picture = 0;
+
+                if (!s->lossless) {
+                    int qp = FFMAX3(s->qscale[0],
+                                    s->qscale[1],
+                                    s->qscale[2]);
+                    int qpw = (s->width + 15) / 16;
+                    AVBufferRef *qp_table_buf = av_buffer_alloc(qpw);
+                    if (qp_table_buf) {
+                        memset(qp_table_buf->data, qp, qpw);
+                        av_frame_set_qp_table(data, qp_table_buf, 0, FF_QSCALE_TYPE_MPEG1);
+                    }
 
-                if (!s->lossless &&
-                    avctx->debug & FF_DEBUG_QP) {
-                    av_log(avctx, AV_LOG_DEBUG,
-                           "QP: %d\n", FFMAX3(s->qscale[0],
-                                              s->qscale[1],
-                                              s->qscale[2]));
+                    if(avctx->debug & FF_DEBUG_QP)
+                        av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", qp);
                 }
 
                 goto the_end;
             case SOS:
-                if (!s->got_picture) {
-                    av_log(avctx, AV_LOG_WARNING,
-                           "Can not process SOS before SOF, skipping\n");
-                    break;
-                    }
                 if ((ret = ff_mjpeg_decode_sos(s, NULL, NULL)) < 0 &&
                     (avctx->err_recognition & AV_EF_EXPLODE))
-                    return ret;
-                /* buggy avid puts EOI every 10-20th frame */
-                /* if restart period is over process EOI */
-                if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
-                    goto eoi_parser;
+                    goto fail;
                 break;
             case DRI:
                 mjpeg_decode_dri(s);
@@ -1608,7 +1803,6 @@ eoi_parser:
                 break;
             }
 
-not_the_end:
             /* eof process start code */
             buf_ptr += (get_bits_count(&s->gb) + 7) / 8;
             av_log(avctx, AV_LOG_DEBUG,
@@ -1622,8 +1816,67 @@ not_the_end:
     }
     av_log(avctx, AV_LOG_FATAL, "No JPEG data found in image\n");
     return AVERROR_INVALIDDATA;
+fail:
+    s->got_picture = 0;
+    return ret;
 the_end:
-    av_log(avctx, AV_LOG_DEBUG, "mjpeg decode frame unused %td bytes\n",
+    if (s->upscale_h) {
+        uint8_t *line = s->picture_ptr->data[s->upscale_h];
+        av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
+                   avctx->pix_fmt == AV_PIX_FMT_YUV444P  ||
+                   avctx->pix_fmt == AV_PIX_FMT_YUVJ440P ||
+                   avctx->pix_fmt == AV_PIX_FMT_YUV440P);
+        for (i = 0; i < s->chroma_height; i++) {
+            for (index = s->width - 1; index; index--)
+                line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
+            line += s->linesize[s->upscale_h];
+        }
+    }
+    if (s->upscale_v) {
+        uint8_t *dst = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(s->height - 1) * s->linesize[s->upscale_v]];
+        int w;
+        avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
+        w = s->width >> hshift;
+        av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
+                   avctx->pix_fmt == AV_PIX_FMT_YUV444P  ||
+                   avctx->pix_fmt == AV_PIX_FMT_YUVJ422P ||
+                   avctx->pix_fmt == AV_PIX_FMT_YUV422P);
+        for (i = s->height - 1; i; i--) {
+            uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[i / 2 * s->linesize[s->upscale_v]];
+            uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[s->upscale_v])[(i + 1) / 2 * s->linesize[s->upscale_v]];
+            if (src1 == src2) {
+                memcpy(dst, src1, w);
+            } else {
+                for (index = 0; index < w; index++)
+                    dst[index] = (src1[index] + src2[index]) >> 1;
+            }
+            dst -= s->linesize[s->upscale_v];
+        }
+    }
+    if (s->flipped && (s->avctx->flags & CODEC_FLAG_EMU_EDGE)) {
+        int j;
+        avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
+        for (index=0; index<4; index++) {
+            uint8_t *dst = s->picture_ptr->data[index];
+            int w = s->width;
+            int h = s->height;
+            if(index && index<3){
+                w = FF_CEIL_RSHIFT(w, hshift);
+                h = FF_CEIL_RSHIFT(h, vshift);
+            }
+            if(dst){
+                uint8_t *dst2 = dst + s->linesize[index]*(h-1);
+                for (i=0; i<h/2; i++) {
+                    for (j=0; j<w; j++)
+                        FFSWAP(int, dst[j], dst2[j]);
+                    dst  += s->linesize[index];
+                    dst2 -= s->linesize[index];
+                }
+            }
+        }
+    }
+
+    av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
            buf_end - buf_ptr);
 //  return buf_end - buf_ptr;
     return buf_ptr - buf;
@@ -1652,6 +1905,13 @@ av_cold int ff_mjpeg_decode_end(AVCodecContext *avctx)
     return 0;
 }
 
+static void decode_flush(AVCodecContext *avctx)
+{
+    MJpegDecodeContext *s = avctx->priv_data;
+    s->got_picture = 0;
+}
+
+#if CONFIG_MJPEG_DECODER
 #define OFFSET(x) offsetof(MJpegDecodeContext, x)
 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
 static const AVOption options[] = {
@@ -1675,11 +1935,14 @@ AVCodec ff_mjpeg_decoder = {
     .init           = ff_mjpeg_decode_init,
     .close          = ff_mjpeg_decode_end,
     .decode         = ff_mjpeg_decode_frame,
+    .flush          = decode_flush,
     .capabilities   = CODEC_CAP_DR1,
+    .max_lowres     = 3,
     .long_name      = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
     .priv_class     = &mjpegdec_class,
 };
-
+#endif
+#if CONFIG_THP_DECODER
 AVCodec ff_thp_decoder = {
     .name           = "thp",
     .type           = AVMEDIA_TYPE_VIDEO,
@@ -1688,6 +1951,9 @@ AVCodec ff_thp_decoder = {
     .init           = ff_mjpeg_decode_init,
     .close          = ff_mjpeg_decode_end,
     .decode         = ff_mjpeg_decode_frame,
+    .flush          = decode_flush,
     .capabilities   = CODEC_CAP_DR1,
+    .max_lowres     = 3,
     .long_name      = NULL_IF_CONFIG_SMALL("Nintendo Gamecube THP video"),
 };
+#endif