X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fwmadec.c;h=0b2e49981d50c5d40bfd12e54acb7e6bab398dc6;hb=e098fba5d9c9d52aaddd83e63dd910ff20b841d2;hp=b4a4c800af37c878e2aff80a035c30cf52359790;hpb=30ba924bc8cec04f53089adbf4ef51b52c4b4b72;p=ffmpeg

diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index b4a4c800af3..0b2e49981d5 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -109,6 +109,11 @@ static int wma_decode_init(AVCodecContext * avctx)
         }
     }
 
+    if(avctx->channels > MAX_CHANNELS){
+        av_log(avctx, AV_LOG_ERROR, "Invalid number of channels (%d)\n", avctx->channels);
+        return -1;
+    }
+
     if(ff_wma_init(avctx, flags2)<0)
         return -1;
 
@@ -131,6 +136,10 @@ static int wma_decode_init(AVCodecContext * avctx)
     }
 
     avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+
+    avcodec_get_frame_defaults(&s->frame);
+    avctx->coded_frame = &s->frame;
+
     return 0;
 }
 
@@ -809,14 +818,13 @@ static int wma_decode_frame(WMACodecContext *s, int16_t *samples)
     return 0;
 }
 
-static int wma_decode_superframe(AVCodecContext *avctx,
-                                 void *data, int *data_size,
-                                 AVPacket *avpkt)
+static int wma_decode_superframe(AVCodecContext *avctx, void *data,
+                                 int *got_frame_ptr, AVPacket *avpkt)
 {
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     WMACodecContext *s = avctx->priv_data;
-    int nb_frames, bit_offset, i, pos, len;
+    int nb_frames, bit_offset, i, pos, len, ret;
     uint8_t *q;
     int16_t *samples;
 
@@ -831,20 +839,25 @@ static int wma_decode_superframe(AVCodecContext *avctx,
     if(s->block_align)
         buf_size = s->block_align;
 
-    samples = data;
-
     init_get_bits(&s->gb, buf, buf_size*8);
 
     if (s->use_bit_reservoir) {
         /* read super frame header */
         skip_bits(&s->gb, 4); /* super frame index */
-        nb_frames = get_bits(&s->gb, 4) - 1;
+        nb_frames = get_bits(&s->gb, 4) - (s->last_superframe_len <= 0);
+    } else {
+        nb_frames = 1;
+    }
 
-        if((nb_frames+1) * s->nb_channels * s->frame_len * sizeof(int16_t) > *data_size){
-            av_log(s->avctx, AV_LOG_ERROR, "Insufficient output space\n");
-            goto fail;
-        }
+    /* get output buffer */
+    s->frame.nb_samples = nb_frames * s->frame_len;
+    if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
+    }
+    samples = (int16_t *)s->frame.data[0];
 
+    if (s->use_bit_reservoir) {
         bit_offset = get_bits(&s->gb, s->byte_offset_bits + 3);
 
         if (s->last_superframe_len > 0) {
@@ -873,6 +886,7 @@ static int wma_decode_superframe(AVCodecContext *avctx,
             if (wma_decode_frame(s, samples) < 0)
                 goto fail;
             samples += s->nb_channels * s->frame_len;
+            nb_frames--;
         }
 
         /* read each frame starting from bit_offset */
@@ -901,10 +915,6 @@ static int wma_decode_superframe(AVCodecContext *avctx,
         s->last_superframe_len = len;
         memcpy(s->last_superframe, buf + pos, len);
     } else {
-        if(s->nb_channels * s->frame_len * sizeof(int16_t) > *data_size){
-            av_log(s->avctx, AV_LOG_ERROR, "Insufficient output space\n");
-            goto fail;
-        }
         /* single frame decode */
         if (wma_decode_frame(s, samples) < 0)
             goto fail;
@@ -912,7 +922,10 @@ static int wma_decode_superframe(AVCodecContext *avctx,
     }
 
 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d outbytes:%d eaten:%d\n", s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len,        (int8_t *)samples - (int8_t *)data, s->block_align);
-    *data_size = (int8_t *)samples - (int8_t *)data;
+
+    *got_frame_ptr   = 1;
+    *(AVFrame *)data = s->frame;
+
     return buf_size;
  fail:
     /* when error, we reset the bit reservoir */
@@ -937,6 +950,7 @@ AVCodec ff_wmav1_decoder = {
     .close          = ff_wma_end,
     .decode         = wma_decode_superframe,
     .flush          = flush,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Audio 1"),
 };
 
@@ -949,5 +963,6 @@ AVCodec ff_wmav2_decoder = {
     .close          = ff_wma_end,
     .decode         = wma_decode_superframe,
     .flush          = flush,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Audio 2"),
 };