Correct motion vector scaling in B-frames for RV3/4

[ffmpeg] / libavcodec / fraps.c

diff --git a/libavcodec/fraps.c b/libavcodec/fraps.c
index e70d0aa021017f93467f5e99a9016cdc0ee81ccd..e03c1fa10c528fdb41a44bc71849054c2aa89e1d 100644 (file)
--- a/libavcodec/fraps.c
+++ b/libavcodec/fraps.c
@@ -55,7 +55,7 @@ typedef struct FrapsContext{
  * @param avctx codec context
  * @return 0 on success or negative if fails
  */
-static int decode_init(AVCodecContext *avctx)
+static av_cold int decode_init(AVCodecContext *avctx)
 {
     FrapsContext * const s = avctx->priv_data;
 
@@ -84,7 +84,8 @@ static int huff_cmp(const void *va, const void *vb){
  * decode Fraps v2 packed plane
  */
 static int fraps2_decode_plane(FrapsContext *s, uint8_t *dst, int stride, int w,
-                               int h, const uint8_t *src, int size, int Uoff)
+                               int h, const uint8_t *src, int size, int Uoff,
+                               const int step)
 {
     int i, j;
     GetBitContext gb;
@@ -104,7 +105,7 @@ static int fraps2_decode_plane(FrapsContext *s, uint8_t *dst, int stride, int w,
 
     init_get_bits(&gb, s->tmpbuf, size * 8);
     for(j = 0; j < h; j++){
-        for(i = 0; i < w; i++){
+        for(i = 0; i < w*step; i += step){
             dst[i] = get_vlc2(&gb, vlc.table, 9, 3);
             /* lines are stored as deltas between previous lines
              * and we need to add 0x80 to the first lines of chroma planes
@@ -140,14 +141,14 @@ static int decode_frame(AVCodecContext *avctx,
     const uint32_t *buf32;
     uint32_t *luma1,*luma2,*cb,*cr;
     uint32_t offs[4];
-    int i, is_chroma, planes;
+    int i, j, is_chroma, planes;
 
 
     header = AV_RL32(buf);
     version = header & 0xff;
     header_size = (header & (1<<30))? 8 : 4; /* bit 30 means pad to 8 bytes */
 
-    if (version > 2 && version != 4) {
+    if (version > 2 && version != 4 && version != 5) {
         av_log(avctx, AV_LOG_ERROR,
                "This file is encoded with Fraps version %d. " \
                "This codec can only decode version 0, 1, 2 and 4.\n", version);
@@ -281,12 +282,60 @@ static int decode_frame(AVCodecContext *avctx,
             is_chroma = !!i;
             s->tmpbuf = av_realloc(s->tmpbuf, offs[i + 1] - offs[i] - 1024 + FF_INPUT_BUFFER_PADDING_SIZE);
             if(fraps2_decode_plane(s, f->data[i], f->linesize[i], avctx->width >> is_chroma,
-                    avctx->height >> is_chroma, buf + offs[i], offs[i + 1] - offs[i], is_chroma) < 0) {
+                    avctx->height >> is_chroma, buf + offs[i], offs[i + 1] - offs[i], is_chroma, 1) < 0) {
                 av_log(avctx, AV_LOG_ERROR, "Error decoding plane %i\n", i);
                 return -1;
             }
         }
         break;
+    case 5:
+        /* Virtually the same as version 4, but is for RGB24 */
+        avctx->pix_fmt = PIX_FMT_BGR24;
+        planes = 3;
+        f->reference = 1;
+        f->buffer_hints = FF_BUFFER_HINTS_VALID |
+                          FF_BUFFER_HINTS_PRESERVE |
+                          FF_BUFFER_HINTS_REUSABLE;
+        if (avctx->reget_buffer(avctx, f)) {
+            av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+            return -1;
+        }
+        /* skip frame */
+        if(buf_size == 8) {
+            f->pict_type = FF_P_TYPE;
+            f->key_frame = 0;
+            break;
+        }
+        f->pict_type = FF_I_TYPE;
+        f->key_frame = 1;
+        if ((AV_RL32(buf) != FPS_TAG)||(buf_size < (planes*1024 + 24))) {
+            av_log(avctx, AV_LOG_ERROR, "Fraps: error in data stream\n");
+            return -1;
+        }
+        for(i = 0; i < planes; i++) {
+            offs[i] = AV_RL32(buf + 4 + i * 4);
+            if(offs[i] >= buf_size || (i && offs[i] <= offs[i - 1] + 1024)) {
+                av_log(avctx, AV_LOG_ERROR, "Fraps: plane %i offset is out of bounds\n", i);
+                return -1;
+            }
+        }
+        offs[planes] = buf_size;
+        for(i = 0; i < planes; i++){
+            s->tmpbuf = av_realloc(s->tmpbuf, offs[i + 1] - offs[i] - 1024 + FF_INPUT_BUFFER_PADDING_SIZE);
+            if(fraps2_decode_plane(s, f->data[0] + i + (f->linesize[0] * (avctx->height - 1)), -f->linesize[0],
+                    avctx->width, avctx->height, buf + offs[i], offs[i + 1] - offs[i], 0, 3) < 0) {
+                av_log(avctx, AV_LOG_ERROR, "Error decoding plane %i\n", i);
+                return -1;
+            }
+        }
+        // convert pseudo-YUV into real RGB
+        for(j = 0; j < avctx->height; j++){
+            for(i = 0; i < avctx->width; i++){
+                f->data[0][0 + i*3 + j*f->linesize[0]] += f->data[0][1 + i*3 + j*f->linesize[0]];
+                f->data[0][2 + i*3 + j*f->linesize[0]] += f->data[0][1 + i*3 + j*f->linesize[0]];
+            }
+        }
+        break;
     }
 
     *frame = *f;
@@ -301,7 +350,7 @@ static int decode_frame(AVCodecContext *avctx,
  * @param avctx codec context
  * @return 0 on success or negative if fails
  */
-static int decode_end(AVCodecContext *avctx)
+static av_cold int decode_end(AVCodecContext *avctx)
 {
     FrapsContext *s = (FrapsContext*)avctx->priv_data;
 
@@ -323,4 +372,5 @@ AVCodec fraps_decoder = {
     decode_end,
     decode_frame,
     CODEC_CAP_DR1,
+    .long_name = NULL_IF_CONFIG_SMALL("Fraps"),
 };