mimic: Convert to the new bitstream reader

[ffmpeg] / libavcodec / aasc.c

diff --git a/libavcodec/aasc.c b/libavcodec/aasc.c
index daabb2cd306f9a618398ad2478d6d5a7a7bfecfd..e65ea397b8a590bd275b4135825e2396bdd1d85a 100644 (file)
--- a/libavcodec/aasc.c
+++ b/libavcodec/aasc.c
@@ -1,26 +1,26 @@
 /*
  * Autodesk RLE Decoder
- * Copyright (C) 2005 the ffmpeg project
+ * Copyright (C) 2005 The FFmpeg project
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
- * @file libavcodec/aasc.c
+ * @file
  * Autodesk RLE Video Decoder by Konstantin Shishkov
  */
 
@@ -29,96 +29,94 @@
 #include <string.h>
 
 #include "avcodec.h"
-#include "dsputil.h"
+#include "internal.h"
 #include "msrledec.h"
 
 typedef struct AascContext {
     AVCodecContext *avctx;
-    AVFrame frame;
+    GetByteContext gb;
+    AVFrame *frame;
 } AascContext;
 
-#define FETCH_NEXT_STREAM_BYTE() \
-    if (stream_ptr >= buf_size) \
-    { \
-      av_log(s->avctx, AV_LOG_ERROR, " AASC: stream ptr just went out of bounds (fetch)\n"); \
-      break; \
-    } \
-    stream_byte = buf[stream_ptr++];
-
 static av_cold int aasc_decode_init(AVCodecContext *avctx)
 {
     AascContext *s = avctx->priv_data;
 
     s->avctx = avctx;
 
-    avctx->pix_fmt = PIX_FMT_BGR24;
-    s->frame.data[0] = NULL;
+    avctx->pix_fmt = AV_PIX_FMT_BGR24;
+
+    s->frame = av_frame_alloc();
+    if (!s->frame)
+        return AVERROR(ENOMEM);
 
     return 0;
 }
 
 static int aasc_decode_frame(AVCodecContext *avctx,
-                              void *data, int *data_size,
+                              void *data, int *got_frame,
                               AVPacket *avpkt)
 {
     const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
-    AascContext *s = avctx->priv_data;
-    int compr, i, stride;
+    int buf_size       = avpkt->size;
+    AascContext *s     = avctx->priv_data;
+    int compr, i, stride, ret;
+
+    if (buf_size < 4)
+        return AVERROR_INVALIDDATA;
 
-    s->frame.reference = 1;
-    s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
-    if (avctx->reget_buffer(avctx, &s->frame)) {
+    if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
-        return -1;
+        return ret;
     }
 
-    compr = AV_RL32(buf);
-    buf += 4;
+    compr     = AV_RL32(buf);
+    buf      += 4;
     buf_size -= 4;
-    switch(compr){
+    switch (compr) {
     case 0:
         stride = (avctx->width * 3 + 3) & ~3;
-        for(i = avctx->height - 1; i >= 0; i--){
-            memcpy(s->frame.data[0] + i*s->frame.linesize[0], buf, avctx->width*3);
+        if (buf_size < stride * avctx->height)
+            return AVERROR_INVALIDDATA;
+        for (i = avctx->height - 1; i >= 0; i--) {
+            memcpy(s->frame->data[0] + i * s->frame->linesize[0], buf, avctx->width * 3);
             buf += stride;
         }
         break;
     case 1:
-        ff_msrle_decode(avctx, (AVPicture*)&s->frame, 8, buf - 4, buf_size + 4);
+        bytestream2_init(&s->gb, buf, buf_size);
+        ff_msrle_decode(avctx, s->frame, 8, &s->gb);
         break;
     default:
         av_log(avctx, AV_LOG_ERROR, "Unknown compression type %d\n", compr);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
-    *data_size = sizeof(AVFrame);
-    *(AVFrame*)data = s->frame;
+    *got_frame = 1;
+    if ((ret = av_frame_ref(data, s->frame)) < 0)
+        return ret;
 
     /* report that the buffer was completely consumed */
-    return buf_size;
+    return avpkt->size;
 }
 
 static av_cold int aasc_decode_end(AVCodecContext *avctx)
 {
     AascContext *s = avctx->priv_data;
 
-    /* release the last frame */
-    if (s->frame.data[0])
-        avctx->release_buffer(avctx, &s->frame);
+    av_frame_free(&s->frame);
 
     return 0;
 }
 
-AVCodec aasc_decoder = {
-    "aasc",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_AASC,
-    sizeof(AascContext),
-    aasc_decode_init,
-    NULL,
-    aasc_decode_end,
-    aasc_decode_frame,
-    CODEC_CAP_DR1,
-    .long_name = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
+AVCodec ff_aasc_decoder = {
+    .name           = "aasc",
+    .long_name      = NULL_IF_CONFIG_SMALL("Autodesk RLE"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_AASC,
+    .priv_data_size = sizeof(AascContext),
+    .init           = aasc_decode_init,
+    .close          = aasc_decode_end,
+    .decode         = aasc_decode_frame,
+    .capabilities   = AV_CODEC_CAP_DR1,
 };