X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Flagarith.c;h=3d3b4d41f434214b1d8935427f20d80ee6c2f8ef;hb=a247ac640df3da573cd661065bf53f37863e2b46;hp=ba2da2eeb21f38f3e2db401c00f2a0dc9a67bf29;hpb=8d21ab4d128ddae03fe6b21542c29dee240151db;p=ffmpeg

diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c
index ba2da2eeb21..69899e423e3 100644
--- a/libavcodec/lagarith.c
+++ b/libavcodec/lagarith.c
@@ -53,9 +53,6 @@ typedef struct LagarithContext {
     LLVidDSPContext llviddsp;
     int zeros;                  /**< number of consecutive zero bytes encountered */
     int zeros_rem;              /**< number of zero bytes remaining to output */
-    uint8_t *rgb_planes;
-    int      rgb_planes_allocated;
-    int rgb_stride;
 } LagarithContext;
 
 /**
@@ -229,6 +226,9 @@ static int lag_read_prob_header(lag_rac *rac, GetBitContext *gb)
         }
     }
 
+    if (scale_factor > 23)
+        return AVERROR_INVALIDDATA;
+
     rac->scale = scale_factor;
 
     /* Fill probability array with cumulative probability for each symbol. */
@@ -541,14 +541,15 @@ static int lag_decode_frame(AVCodecContext *avctx,
     LagarithContext *l = avctx->priv_data;
     ThreadFrame frame = { .f = data };
     AVFrame *const p  = data;
-    uint8_t frametype = 0;
+    uint8_t frametype;
     uint32_t offset_gu = 0, offset_bv = 0, offset_ry = 9;
     uint32_t offs[4];
-    uint8_t *srcs[4], *dst;
+    uint8_t *srcs[4];
     int i, j, planes = 3;
     int ret;
 
     p->key_frame = 1;
+    p->pict_type = AV_PICTURE_TYPE_I;
 
     frametype = buf[0];
 
@@ -557,64 +558,60 @@ static int lag_decode_frame(AVCodecContext *avctx,
 
     switch (frametype) {
     case FRAME_SOLID_RGBA:
-        avctx->pix_fmt = AV_PIX_FMT_RGB32;
+        avctx->pix_fmt = AV_PIX_FMT_GBRAP;
     case FRAME_SOLID_GRAY:
         if (frametype == FRAME_SOLID_GRAY)
             if (avctx->bits_per_coded_sample == 24) {
-                avctx->pix_fmt = AV_PIX_FMT_RGB24;
+                avctx->pix_fmt = AV_PIX_FMT_GBRP;
             } else {
-                avctx->pix_fmt = AV_PIX_FMT_0RGB32;
+                avctx->pix_fmt = AV_PIX_FMT_GBRAP;
                 planes = 4;
             }
 
         if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
             return ret;
 
-        dst = p->data[0];
         if (frametype == FRAME_SOLID_RGBA) {
-        for (j = 0; j < avctx->height; j++) {
-            for (i = 0; i < avctx->width; i++)
-                AV_WN32(dst + i * 4, offset_gu);
-            dst += p->linesize[0];
-        }
+            for (i = 0; i < avctx->height; i++) {
+                memset(p->data[0] + i * p->linesize[0], buf[2], avctx->width);
+                memset(p->data[1] + i * p->linesize[1], buf[1], avctx->width);
+                memset(p->data[2] + i * p->linesize[2], buf[3], avctx->width);
+                memset(p->data[3] + i * p->linesize[3], buf[4], avctx->width);
+            }
         } else {
-            for (j = 0; j < avctx->height; j++) {
-                memset(dst, buf[1], avctx->width * planes);
-                dst += p->linesize[0];
+            for (i = 0; i < avctx->height; i++) {
+                for (j = 0; j < planes; j++)
+                    memset(p->data[j] + i * p->linesize[j], buf[1], avctx->width);
             }
         }
         break;
     case FRAME_SOLID_COLOR:
         if (avctx->bits_per_coded_sample == 24) {
-            avctx->pix_fmt = AV_PIX_FMT_RGB24;
+            avctx->pix_fmt = AV_PIX_FMT_GBRP;
         } else {
-            avctx->pix_fmt = AV_PIX_FMT_RGB32;
-            offset_gu |= 0xFFU << 24;
+            avctx->pix_fmt = AV_PIX_FMT_GBRAP;
         }
 
         if ((ret = ff_thread_get_buffer(avctx, &frame,0)) < 0)
             return ret;
 
-        dst = p->data[0];
-        for (j = 0; j < avctx->height; j++) {
-            for (i = 0; i < avctx->width; i++)
-                if (avctx->bits_per_coded_sample == 24) {
-                    AV_WB24(dst + i * 3, offset_gu);
-                } else {
-                    AV_WN32(dst + i * 4, offset_gu);
-                }
-            dst += p->linesize[0];
+        for (i = 0; i < avctx->height; i++) {
+            memset(p->data[0] + i * p->linesize[0], buf[2], avctx->width);
+            memset(p->data[1] + i * p->linesize[1], buf[1], avctx->width);
+            memset(p->data[2] + i * p->linesize[2], buf[3], avctx->width);
+            if (avctx->pix_fmt == AV_PIX_FMT_GBRAP)
+                memset(p->data[3] + i * p->linesize[3], 0xFFu, avctx->width);
         }
         break;
     case FRAME_ARITH_RGBA:
-        avctx->pix_fmt = AV_PIX_FMT_RGB32;
+        avctx->pix_fmt = AV_PIX_FMT_GBRAP;
         planes = 4;
         offset_ry += 4;
         offs[3] = AV_RL32(buf + 9);
     case FRAME_ARITH_RGB24:
     case FRAME_U_RGB24:
         if (frametype == FRAME_ARITH_RGB24 || frametype == FRAME_U_RGB24)
-            avctx->pix_fmt = AV_PIX_FMT_RGB24;
+            avctx->pix_fmt = AV_PIX_FMT_GBRP;
 
         if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
             return ret;
@@ -623,15 +620,8 @@ static int lag_decode_frame(AVCodecContext *avctx,
         offs[1] = offset_gu;
         offs[2] = offset_ry;
 
-        l->rgb_stride = FFALIGN(avctx->width, 16);
-        av_fast_malloc(&l->rgb_planes, &l->rgb_planes_allocated,
-                       l->rgb_stride * avctx->height * planes + 1);
-        if (!l->rgb_planes) {
-            av_log(avctx, AV_LOG_ERROR, "cannot allocate temporary buffer\n");
-            return AVERROR(ENOMEM);
-        }
         for (i = 0; i < planes; i++)
-            srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
+            srcs[i] = p->data[i] + (avctx->height - 1) * p->linesize[i];
         for (i = 0; i < planes; i++)
             if (buf_size <= offs[i]) {
                 av_log(avctx, AV_LOG_ERROR,
@@ -642,32 +632,16 @@ static int lag_decode_frame(AVCodecContext *avctx,
         for (i = 0; i < planes; i++)
             lag_decode_arith_plane(l, srcs[i],
                                    avctx->width, avctx->height,
-                                   -l->rgb_stride, buf + offs[i],
+                                   -p->linesize[i], buf + offs[i],
                                    buf_size - offs[i]);
-        dst = p->data[0];
-        for (i = 0; i < planes; i++)
-            srcs[i] = l->rgb_planes + i * l->rgb_stride * avctx->height;
-        for (j = 0; j < avctx->height; j++) {
-            for (i = 0; i < avctx->width; i++) {
-                uint8_t r, g, b, a;
-                r = srcs[0][i];
-                g = srcs[1][i];
-                b = srcs[2][i];
-                r += g;
-                b += g;
-                if (frametype == FRAME_ARITH_RGBA) {
-                    a = srcs[3][i];
-                    AV_WN32(dst + i * 4, MKBETAG(a, r, g, b));
-                } else {
-                    dst[i * 3 + 0] = r;
-                    dst[i * 3 + 1] = g;
-                    dst[i * 3 + 2] = b;
-                }
-            }
-            dst += p->linesize[0];
-            for (i = 0; i < planes; i++)
-                srcs[i] += l->rgb_stride;
+        for (i = 0; i < avctx->height; i++) {
+            l->llviddsp.add_bytes(p->data[0] + i * p->linesize[0], p->data[1] + i * p->linesize[1], avctx->width);
+            l->llviddsp.add_bytes(p->data[2] + i * p->linesize[2], p->data[1] + i * p->linesize[1], avctx->width);
         }
+        FFSWAP(uint8_t*, p->data[0], p->data[1]);
+        FFSWAP(int, p->linesize[0], p->linesize[1]);
+        FFSWAP(uint8_t*, p->data[2], p->data[1]);
+        FFSWAP(int, p->linesize[2], p->linesize[1]);
         break;
     case FRAME_ARITH_YUY2:
         avctx->pix_fmt = AV_PIX_FMT_YUV422P;
@@ -698,9 +672,6 @@ static int lag_decode_frame(AVCodecContext *avctx,
 
         if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
             return ret;
-        if (buf_size <= offset_ry || buf_size <= offset_gu || buf_size <= offset_bv) {
-            return AVERROR_INVALIDDATA;
-        }
 
         if (offset_ry >= buf_size ||
             offset_gu >= buf_size ||
@@ -741,34 +712,13 @@ static av_cold int lag_decode_init(AVCodecContext *avctx)
     return 0;
 }
 
-#if HAVE_THREADS
-static av_cold int lag_decode_init_thread_copy(AVCodecContext *avctx)
-{
-    LagarithContext *l = avctx->priv_data;
-    l->avctx = avctx;
-
-    return 0;
-}
-#endif
-
-static av_cold int lag_decode_end(AVCodecContext *avctx)
-{
-    LagarithContext *l = avctx->priv_data;
-
-    av_freep(&l->rgb_planes);
-
-    return 0;
-}
-
-AVCodec ff_lagarith_decoder = {
+const AVCodec ff_lagarith_decoder = {
     .name           = "lagarith",
     .long_name      = NULL_IF_CONFIG_SMALL("Lagarith lossless"),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_LAGARITH,
     .priv_data_size = sizeof(LagarithContext),
     .init           = lag_decode_init,
-    .init_thread_copy = ONLY_IF_THREADS_ENABLED(lag_decode_init_thread_copy),
-    .close          = lag_decode_end,
     .decode         = lag_decode_frame,
     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
 };