lavc: add a null bitstream filter

[ffmpeg] / libavcodec / aura.c

diff --git a/libavcodec/aura.c b/libavcodec/aura.c
index 6052a65acf9d5d59537fdea80414f28932473515..a1ef6f8d10b8c30a289ffc389dc10b3bf4695b7a 100644 (file)
--- a/libavcodec/aura.c
+++ b/libavcodec/aura.c
@@ -24,34 +24,27 @@
  */
 
 #include "avcodec.h"
-
-typedef struct AuraDecodeContext {
-    AVCodecContext *avctx;
-    AVFrame frame;
-} AuraDecodeContext;
+#include "internal.h"
+#include "libavutil/internal.h"
 
 static av_cold int aura_decode_init(AVCodecContext *avctx)
 {
-    AuraDecodeContext *s = avctx->priv_data;
-
-    s->avctx = avctx;
     /* width needs to be divisible by 4 for this codec to work */
     if (avctx->width & 0x3)
-        return -1;
-    avctx->pix_fmt = PIX_FMT_YUV422P;
+        return AVERROR(EINVAL);
+    avctx->pix_fmt = AV_PIX_FMT_YUV422P;
 
     return 0;
 }
 
 static int aura_decode_frame(AVCodecContext *avctx,
-                             void *data, int *data_size,
+                             void *data, int *got_frame,
                              AVPacket *pkt)
 {
-    AuraDecodeContext *s=avctx->priv_data;
-
+    AVFrame *frame = data;
     uint8_t *Y, *U, *V;
     uint8_t val;
-    int x, y;
+    int x, y, ret;
     const uint8_t *buf = pkt->data;
 
     /* prediction error tables (make it clear that they are signed values) */
@@ -60,76 +53,58 @@ static int aura_decode_frame(AVCodecContext *avctx,
     if (pkt->size != 48 + avctx->height * avctx->width) {
         av_log(avctx, AV_LOG_ERROR, "got a buffer with %d bytes when %d were expected\n",
                pkt->size, 48 + avctx->height * avctx->width);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     /* pixel data starts 48 bytes in, after 3x16-byte tables */
     buf += 48;
 
-    if(s->frame.data[0])
-        avctx->release_buffer(avctx, &s->frame);
-
-    s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
-    s->frame.reference = 0;
-    if(avctx->get_buffer(avctx, &s->frame) < 0) {
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
-        return -1;
+        return ret;
     }
 
-    Y = s->frame.data[0];
-    U = s->frame.data[1];
-    V = s->frame.data[2];
+    Y = frame->data[0];
+    U = frame->data[1];
+    V = frame->data[2];
 
     /* iterate through each line in the height */
     for (y = 0; y < avctx->height; y++) {
         /* reset predictors */
-        val = *buf++;
+        val  = *buf++;
         U[0] = val & 0xF0;
         Y[0] = val << 4;
-        val = *buf++;
+        val  = *buf++;
         V[0] = val & 0xF0;
         Y[1] = Y[0] + delta_table[val & 0xF];
-        Y += 2; U++; V++;
+        Y   += 2; U++; V++;
 
         /* iterate through the remaining pixel groups (4 pixels/group) */
         for (x = 1; x < (avctx->width >> 1); x++) {
-            val = *buf++;
+            val  = *buf++;
             U[0] = U[-1] + delta_table[val >> 4];
             Y[0] = Y[-1] + delta_table[val & 0xF];
-            val = *buf++;
+            val  = *buf++;
             V[0] = V[-1] + delta_table[val >> 4];
             Y[1] = Y[ 0] + delta_table[val & 0xF];
-            Y += 2; U++; V++;
+            Y   += 2; U++; V++;
         }
-        Y += s->frame.linesize[0] -  avctx->width;
-        U += s->frame.linesize[1] - (avctx->width >> 1);
-        V += s->frame.linesize[2] - (avctx->width >> 1);
+        Y += frame->linesize[0] -  avctx->width;
+        U += frame->linesize[1] - (avctx->width >> 1);
+        V += frame->linesize[2] - (avctx->width >> 1);
     }
 
-    *data_size=sizeof(AVFrame);
-    *(AVFrame*)data= s->frame;
+    *got_frame = 1;
 
     return pkt->size;
 }
 
-static av_cold int aura_decode_end(AVCodecContext *avctx)
-{
-    AuraDecodeContext *s = avctx->priv_data;
-
-    if (s->frame.data[0])
-        avctx->release_buffer(avctx, &s->frame);
-
-    return 0;
-}
-
 AVCodec ff_aura2_decoder = {
     .name           = "aura2",
+    .long_name      = NULL_IF_CONFIG_SMALL("Auravision Aura 2"),
     .type           = AVMEDIA_TYPE_VIDEO,
-    .id             = CODEC_ID_AURA2,
-    .priv_data_size = sizeof(AuraDecodeContext),
+    .id             = AV_CODEC_ID_AURA2,
     .init           = aura_decode_init,
-    .close          = aura_decode_end,
     .decode         = aura_decode_frame,
-    .capabilities   = CODEC_CAP_DR1,
-    .long_name = NULL_IF_CONFIG_SMALL("Auravision Aura 2"),
+    .capabilities   = AV_CODEC_CAP_DR1,
 };