Port pred8x8l_horizontal_down_mmxext (H.264 intra prediction) from x264

[ffmpeg] / libavcodec / qpeg.c

diff --git a/libavcodec/qpeg.c b/libavcodec/qpeg.c
index 3c597e8df61c2ce0548e284c4cea9f16c0c21e0c..e6a0b30aefbc6075c545e7602320d5bb2276400e 100644 (file)
--- a/libavcodec/qpeg.c
+++ b/libavcodec/qpeg.c
@@ -17,16 +17,14 @@
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
  */
 
 /**
- * @file qpeg.c
+ * @file
  * QPEG codec.
  */
 
 #include "avcodec.h"
-#include "mpegvideo.h"
 
 typedef struct QpegContext{
     AVCodecContext *avctx;
@@ -34,7 +32,7 @@ typedef struct QpegContext{
     uint8_t *refdata;
 } QpegContext;
 
-static void qpeg_decode_intra(uint8_t *src, uint8_t *dst, int size,
+static void qpeg_decode_intra(const uint8_t *src, uint8_t *dst, int size,
                             int stride, int width, int height)
 {
     int i;
@@ -110,28 +108,26 @@ static void qpeg_decode_intra(uint8_t *src, uint8_t *dst, int size,
     }
 }
 
-static int qpeg_table_h[16] =
+static const int qpeg_table_h[16] =
  { 0x00, 0x20, 0x20, 0x20, 0x18, 0x10, 0x10, 0x20, 0x10, 0x08, 0x18, 0x08, 0x08, 0x18, 0x10, 0x04};
-static int qpeg_table_w[16] =
+static const int qpeg_table_w[16] =
  { 0x00, 0x20, 0x18, 0x08, 0x18, 0x10, 0x20, 0x10, 0x08, 0x10, 0x20, 0x20, 0x08, 0x10, 0x18, 0x04};
 
 /* Decodes delta frames */
-static void qpeg_decode_inter(uint8_t *src, uint8_t *dst, int size,
+static void qpeg_decode_inter(const uint8_t *src, uint8_t *dst, int size,
                             int stride, int width, int height,
-                            int delta, uint8_t *ctable, uint8_t *refdata)
+                            int delta, const uint8_t *ctable, uint8_t *refdata)
 {
     int i, j;
     int code;
     int filled = 0;
     int orig_height;
-    uint8_t *blkdata;
 
     /* copy prev frame */
     for(i = 0; i < height; i++)
         memcpy(refdata + (i * width), dst + (i * stride), width);
 
     orig_height = height;
-    blkdata = src - 0x86;
     height--;
     dst = dst + height * stride;
 
@@ -252,8 +248,10 @@ static void qpeg_decode_inter(uint8_t *src, uint8_t *dst, int size,
 
 static int decode_frame(AVCodecContext *avctx,
                         void *data, int *data_size,
-                        uint8_t *buf, int buf_size)
+                        AVPacket *avpkt)
 {
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
     QpegContext * const a = avctx->priv_data;
     AVFrame * const p= (AVFrame*)&a->pic;
     uint8_t* outdata;
@@ -288,19 +286,21 @@ static int decode_frame(AVCodecContext *avctx,
     return buf_size;
 }
 
-static int decode_init(AVCodecContext *avctx){
+static av_cold int decode_init(AVCodecContext *avctx){
     QpegContext * const a = avctx->priv_data;
 
+    if (!avctx->palctrl) {
+        av_log(avctx, AV_LOG_FATAL, "Missing required palette via palctrl\n");
+        return -1;
+    }
     a->avctx = avctx;
     avctx->pix_fmt= PIX_FMT_PAL8;
-    avctx->has_b_frames = 0;
-    a->pic.data[0] = NULL;
     a->refdata = av_malloc(avctx->width * avctx->height);
 
     return 0;
 }
 
-static int decode_end(AVCodecContext *avctx){
+static av_cold int decode_end(AVCodecContext *avctx){
     QpegContext * const a = avctx->priv_data;
     AVFrame * const p= (AVFrame*)&a->pic;
 
@@ -313,7 +313,7 @@ static int decode_end(AVCodecContext *avctx){
 
 AVCodec qpeg_decoder = {
     "qpeg",
-    CODEC_TYPE_VIDEO,
+    AVMEDIA_TYPE_VIDEO,
     CODEC_ID_QPEG,
     sizeof(QpegContext),
     decode_init,
@@ -321,4 +321,5 @@ AVCodec qpeg_decoder = {
     decode_end,
     decode_frame,
     CODEC_CAP_DR1,
+    .long_name = NULL_IF_CONFIG_SMALL("Q-team QPEG"),
 };