x86: h264qpel: Move stray comment to the right spot and clarify it

[ffmpeg] / libavcodec / msvideo1.c

diff --git a/libavcodec/msvideo1.c b/libavcodec/msvideo1.c
index 1e3f6cce2319b82f87f1f4827c8476065c953bfe..860a89311847197676c12086681e6b909e69370f 100644 (file)
--- a/libavcodec/msvideo1.c
+++ b/libavcodec/msvideo1.c
@@ -2,43 +2,38 @@
  * Microsoft Video-1 Decoder
  * Copyright (C) 2003 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 msvideo1.c
+ * @file
  * Microsoft Video-1 Decoder by Mike Melanson (melanson@pcisys.net)
  * For more information about the MS Video-1 format, visit:
  *   http://www.pcisys.net/~melanson/codecs/
  *
- * This decoder outputs either PAL8 or RGB555 data, depending on the
- * whether a RGB palette was passed through palctrl;
- * if it's present, then the data is PAL8; RGB555 otherwise.
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 
-#include "common.h"
+#include "libavutil/internal.h"
+#include "libavutil/intreadwrite.h"
 #include "avcodec.h"
-#include "dsputil.h"
 
 #define PALETTE_COUNT 256
 #define CHECK_STREAM_PTR(n) \
@@ -51,34 +46,31 @@
 typedef struct Msvideo1Context {
 
     AVCodecContext *avctx;
-    DSPContext dsp;
     AVFrame frame;
 
-    unsigned char *buf;
+    const unsigned char *buf;
     int size;
 
     int mode_8bit;  /* if it's not 8-bit, it's 16-bit */
 
+    uint32_t pal[256];
 } Msvideo1Context;
 
-static int msvideo1_decode_init(AVCodecContext *avctx)
+static av_cold int msvideo1_decode_init(AVCodecContext *avctx)
 {
-    Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+    Msvideo1Context *s = avctx->priv_data;
 
     s->avctx = avctx;
 
     /* figure out the colorspace based on the presence of a palette */
-    if (s->avctx->palctrl) {
+    if (s->avctx->bits_per_coded_sample == 8) {
         s->mode_8bit = 1;
-        avctx->pix_fmt = PIX_FMT_PAL8;
+        avctx->pix_fmt = AV_PIX_FMT_PAL8;
     } else {
         s->mode_8bit = 0;
-        avctx->pix_fmt = PIX_FMT_RGB555;
+        avctx->pix_fmt = AV_PIX_FMT_RGB555;
     }
 
-    avctx->has_b_frames = 0;
-    dsputil_init(&s->dsp, avctx);
-
     s->frame.data[0] = NULL;
 
     return 0;
@@ -180,13 +172,8 @@ static void msvideo1_decode_8bit(Msvideo1Context *s)
     }
 
     /* make the palette available on the way out */
-    if (s->avctx->pix_fmt == PIX_FMT_PAL8) {
-        memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
-        if (s->avctx->palctrl->palette_changed) {
-            s->frame.palette_has_changed = 1;
-            s->avctx->palctrl->palette_changed = 0;
-        }
-    }
+    if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
+        memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE);
 }
 
 static void msvideo1_decode_16bit(Msvideo1Context *s)
@@ -299,10 +286,12 @@ static void msvideo1_decode_16bit(Msvideo1Context *s)
 }
 
 static int msvideo1_decode_frame(AVCodecContext *avctx,
-                                void *data, int *data_size,
-                                uint8_t *buf, int buf_size)
+                                void *data, int *got_frame,
+                                AVPacket *avpkt)
 {
-    Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    Msvideo1Context *s = avctx->priv_data;
 
     s->buf = buf;
     s->size = buf_size;
@@ -314,21 +303,30 @@ static int msvideo1_decode_frame(AVCodecContext *avctx,
         return -1;
     }
 
+    if (s->mode_8bit) {
+        const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
+
+        if (pal) {
+            memcpy(s->pal, pal, AVPALETTE_SIZE);
+            s->frame.palette_has_changed = 1;
+        }
+    }
+
     if (s->mode_8bit)
         msvideo1_decode_8bit(s);
     else
         msvideo1_decode_16bit(s);
 
-    *data_size = sizeof(AVFrame);
+    *got_frame      = 1;
     *(AVFrame*)data = s->frame;
 
     /* report that the buffer was completely consumed */
     return buf_size;
 }
 
-static int msvideo1_decode_end(AVCodecContext *avctx)
+static av_cold int msvideo1_decode_end(AVCodecContext *avctx)
 {
-    Msvideo1Context *s = (Msvideo1Context *)avctx->priv_data;
+    Msvideo1Context *s = avctx->priv_data;
 
     if (s->frame.data[0])
         avctx->release_buffer(avctx, &s->frame);
@@ -336,14 +334,14 @@ static int msvideo1_decode_end(AVCodecContext *avctx)
     return 0;
 }
 
-AVCodec msvideo1_decoder = {
-    "msvideo1",
-    CODEC_TYPE_VIDEO,
-    CODEC_ID_MSVIDEO1,
-    sizeof(Msvideo1Context),
-    msvideo1_decode_init,
-    NULL,
-    msvideo1_decode_end,
-    msvideo1_decode_frame,
-    CODEC_CAP_DR1,
+AVCodec ff_msvideo1_decoder = {
+    .name           = "msvideo1",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_MSVIDEO1,
+    .priv_data_size = sizeof(Msvideo1Context),
+    .init           = msvideo1_decode_init,
+    .close          = msvideo1_decode_end,
+    .decode         = msvideo1_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("Microsoft Video 1"),
 };