mxfdec: Compute packet offsets properly.

[ffmpeg] / libavcodec / dsicinav.c

diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c
index cafcaa77194188cdceac8d4f5220b0a95d65cb37..37d39f5405c08ce412974e017cac19c5829b00ec 100644 (file)
--- a/libavcodec/dsicinav.c
+++ b/libavcodec/dsicinav.c
@@ -26,6 +26,7 @@
 
 #include "avcodec.h"
 #include "bytestream.h"
+#include "mathops.h"
 
 
 typedef enum CinVideoBitmapIndex {
@@ -43,6 +44,7 @@ typedef struct CinVideoContext {
 } CinVideoContext;
 
 typedef struct CinAudioContext {
+    AVFrame frame;
     int initial_decode_frame;
     int delta;
 } CinAudioContext;
@@ -316,37 +318,47 @@ static av_cold int cinaudio_decode_init(AVCodecContext *avctx)
     cin->delta = 0;
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;
 
+    avcodec_get_frame_defaults(&cin->frame);
+    avctx->coded_frame = &cin->frame;
+
     return 0;
 }
 
-static int cinaudio_decode_frame(AVCodecContext *avctx,
-                                 void *data, int *data_size,
-                                 AVPacket *avpkt)
+static int cinaudio_decode_frame(AVCodecContext *avctx, void *data,
+                                 int *got_frame_ptr, AVPacket *avpkt)
 {
     const uint8_t *buf = avpkt->data;
-    int buf_size = avpkt->size;
     CinAudioContext *cin = avctx->priv_data;
-    const uint8_t *src = buf;
-    int16_t *samples = data;
-
-    buf_size = FFMIN(buf_size, *data_size/2);
+    const uint8_t *buf_end = buf + avpkt->size;
+    int16_t *samples;
+    int delta, ret;
+
+    /* get output buffer */
+    cin->frame.nb_samples = avpkt->size - cin->initial_decode_frame;
+    if ((ret = avctx->get_buffer(avctx, &cin->frame)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
+    }
+    samples = (int16_t *)cin->frame.data[0];
 
+    delta = cin->delta;
     if (cin->initial_decode_frame) {
         cin->initial_decode_frame = 0;
-        cin->delta = (int16_t)AV_RL16(src); src += 2;
-        *samples++ = cin->delta;
-        buf_size -= 2;
+        delta = sign_extend(AV_RL16(buf), 16);
+        buf += 2;
+        *samples++ = delta;
     }
-    while (buf_size > 0) {
-        cin->delta += cinaudio_delta16_table[*src++];
-        cin->delta = av_clip_int16(cin->delta);
-        *samples++ = cin->delta;
-        --buf_size;
+    while (buf < buf_end) {
+        delta += cinaudio_delta16_table[*buf++];
+        delta = av_clip_int16(delta);
+        *samples++ = delta;
     }
+    cin->delta = delta;
 
-    *data_size = (uint8_t *)samples - (uint8_t *)data;
+    *got_frame_ptr   = 1;
+    *(AVFrame *)data = cin->frame;
 
-    return src - buf;
+    return avpkt->size;
 }
 
 
@@ -369,5 +381,6 @@ AVCodec ff_dsicinaudio_decoder = {
     .priv_data_size = sizeof(CinAudioContext),
     .init           = cinaudio_decode_init,
     .decode         = cinaudio_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN audio"),
 };