Remove declaration of non-existing functions

[ffmpeg] / libavcodec / bmp.c

diff --git a/libavcodec/bmp.c b/libavcodec/bmp.c
index 2a4d83393ef4b8fa92639c6ba2ae36ab19d9af5f..52de3be2148569f24f8858eec7a19a27954a10c5 100644 (file)
--- a/libavcodec/bmp.c
+++ b/libavcodec/bmp.c
@@ -1,5 +1,5 @@
 /*
- * BMP image format
+ * BMP image format decoder
  * Copyright (c) 2005 Mans Rullgard
  *
  * This file is part of FFmpeg.
@@ -20,22 +20,10 @@
  */
 
 #include "avcodec.h"
-#include "bitstream.h"
-#include "bswap.h"
+#include "bytestream.h"
+#include "bmp.h"
 
-typedef struct BMPContext {
-    AVFrame picture;
-} BMPContext;
-
-#define BMP_RGB       0
-#define BMP_RLE8      1
-#define BMP_RLE4      2
-#define BMP_BITFIELDS 3
-
-#define read16(bits) bswap_16(get_bits(bits, 16))
-#define read32(bits) bswap_32(get_bits_long(bits, 32))
-
-static int bmp_decode_init(AVCodecContext *avctx){
+static av_cold int bmp_decode_init(AVCodecContext *avctx){
     BMPContext *s = avctx->priv_data;
 
     avcodec_get_frame_defaults((AVFrame*)&s->picture);
@@ -46,69 +34,68 @@ static int bmp_decode_init(AVCodecContext *avctx){
 
 static int bmp_decode_frame(AVCodecContext *avctx,
                             void *data, int *data_size,
-                            uint8_t *buf, int buf_size)
+                            const uint8_t *buf, int buf_size)
 {
     BMPContext *s = avctx->priv_data;
     AVFrame *picture = data;
     AVFrame *p = &s->picture;
-    GetBitContext bits;
     unsigned int fsize, hsize;
     int width, height;
     unsigned int depth;
-    unsigned int comp;
+    BiCompression comp;
     unsigned int ihsize;
     int i, j, n, linesize;
     uint32_t rgb[3];
     uint8_t *ptr;
     int dsize;
+    const uint8_t *buf0 = buf;
 
     if(buf_size < 14){
         av_log(avctx, AV_LOG_ERROR, "buf size too small (%d)\n", buf_size);
         return -1;
     }
 
-    init_get_bits(&bits, buf, buf_size);
-
-    if(get_bits(&bits, 16) != 0x424d){ /* 'BM' */
+    if(bytestream_get_byte(&buf) != 'B' ||
+       bytestream_get_byte(&buf) != 'M') {
         av_log(avctx, AV_LOG_ERROR, "bad magic number\n");
         return -1;
     }
 
-    fsize = read32(&bits);
+    fsize = bytestream_get_le32(&buf);
     if(buf_size < fsize){
         av_log(avctx, AV_LOG_ERROR, "not enough data (%d < %d)\n",
                buf_size, fsize);
         return -1;
     }
 
-    skip_bits(&bits, 16);       /* reserved1 */
-    skip_bits(&bits, 16);       /* reserved2 */
+    buf += 2; /* reserved1 */
+    buf += 2; /* reserved2 */
 
-    hsize = read32(&bits); /* header size */
+    hsize = bytestream_get_le32(&buf); /* header size */
     if(fsize <= hsize){
         av_log(avctx, AV_LOG_ERROR, "not enough data (%d < %d)\n",
                fsize, hsize);
         return -1;
     }
 
-    ihsize = read32(&bits);       /* more header size */
+    ihsize = bytestream_get_le32(&buf);       /* more header size */
     if(ihsize + 14 > hsize){
         av_log(avctx, AV_LOG_ERROR, "invalid header size %d\n", hsize);
         return -1;
     }
 
-    width = read32(&bits);
-    height = read32(&bits);
+    width = bytestream_get_le32(&buf);
+    height = bytestream_get_le32(&buf);
 
-    if(read16(&bits) != 1){ /* planes */
+    if(bytestream_get_le16(&buf) != 1){ /* planes */
         av_log(avctx, AV_LOG_ERROR, "invalid BMP header\n");
         return -1;
     }
 
-    depth = read16(&bits);
+    depth = bytestream_get_le16(&buf);
 
     if(ihsize > 16)
-        comp = read32(&bits);
+        comp = bytestream_get_le32(&buf);
     else
         comp = BMP_RGB;
 
@@ -118,13 +105,12 @@ static int bmp_decode_frame(AVCodecContext *avctx,
     }
 
     if(comp == BMP_BITFIELDS){
-        skip_bits(&bits, 20 * 8);
-        rgb[0] = read32(&bits);
-        rgb[1] = read32(&bits);
-        rgb[2] = read32(&bits);
+        buf += 20;
+        rgb[0] = bytestream_get_le32(&buf);
+        rgb[1] = bytestream_get_le32(&buf);
+        rgb[2] = bytestream_get_le32(&buf);
     }
 
-    avctx->codec_id = CODEC_ID_BMP;
     avctx->width = width;
     avctx->height = height > 0? height: -height;
 
@@ -166,6 +152,9 @@ static int bmp_decode_frame(AVCodecContext *avctx,
         return -1;
     }
 
+    if(p->data[0])
+        avctx->release_buffer(avctx, p);
+
     p->reference = 0;
     if(avctx->get_buffer(avctx, p) < 0){
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
@@ -174,7 +163,7 @@ static int bmp_decode_frame(AVCodecContext *avctx,
     p->pict_type = FF_I_TYPE;
     p->key_frame = 1;
 
-    buf += hsize;
+    buf = buf0 + hsize;
     dsize = buf_size - hsize;
 
     /* Line size in file multiple of 4 */
@@ -197,14 +186,14 @@ static int bmp_decode_frame(AVCodecContext *avctx,
     switch(depth){
     case 24:
         for(i = 0; i < avctx->height; i++){
-            memcpy(ptr, buf, n);
+            memcpy(ptr, buf, avctx->width*(depth>>3));
             buf += n;
             ptr += linesize;
         }
         break;
     case 16:
         for(i = 0; i < avctx->height; i++){
-            uint16_t *src = (uint16_t *) buf;
+            const uint16_t *src = (const uint16_t *) buf;
             uint16_t *dst = (uint16_t *) ptr;
 
             for(j = 0; j < avctx->width; j++)
@@ -216,7 +205,7 @@ static int bmp_decode_frame(AVCodecContext *avctx,
         break;
     case 32:
         for(i = 0; i < avctx->height; i++){
-            uint8_t *src = buf;
+            const uint8_t *src = buf;
             uint8_t *dst = ptr;
 
             for(j = 0; j < avctx->width; j++){
@@ -242,6 +231,16 @@ static int bmp_decode_frame(AVCodecContext *avctx,
     return buf_size;
 }
 
+static av_cold int bmp_decode_end(AVCodecContext *avctx)
+{
+    BMPContext* c = avctx->priv_data;
+
+    if (c->picture.data[0])
+        avctx->release_buffer(avctx, &c->picture);
+
+    return 0;
+}
+
 AVCodec bmp_decoder = {
     "bmp",
     CODEC_TYPE_VIDEO,
@@ -249,6 +248,6 @@ AVCodec bmp_decoder = {
     sizeof(BMPContext),
     bmp_decode_init,
     NULL,
-    NULL,
+    bmp_decode_end,
     bmp_decode_frame
 };