X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fwmaprodec.c;h=4d530264dfd98cb3bb8750ca2e1c04778cecb230;hb=ce79410bba776d4121685654056f2b4e39bbd3f7;hp=55a48078dbd2b7c09595b6f6fe42e9f3139318e2;hpb=45f4bf94afb8b70d99fb7b5760fd65f5c3ad8b88;p=ffmpeg

diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index 55a48078dbd..4d530264dfd 100644
--- a/libavcodec/wmaprodec.c
+++ b/libavcodec/wmaprodec.c
@@ -1755,8 +1755,9 @@ static int xma_decode_packet(AVCodecContext *avctx, void *data,
     if (got_stream_frame_ptr) {
         memcpy(&s->samples[s->current_stream * 2 + 0][s->offset[s->current_stream] * 512],
                s->frames[s->current_stream]->extended_data[0], 512 * 4);
-        memcpy(&s->samples[s->current_stream * 2 + 1][s->offset[s->current_stream] * 512],
-               s->frames[s->current_stream]->extended_data[1], 512 * 4);
+        if (avctx->channels > 1)
+            memcpy(&s->samples[s->current_stream * 2 + 1][s->offset[s->current_stream] * 512],
+                   s->frames[s->current_stream]->extended_data[1], 512 * 4);
         s->offset[s->current_stream]++;
     }
 
@@ -1794,7 +1795,7 @@ static int xma_decode_packet(AVCodecContext *avctx, void *data,
             s->xma[i].skip_packets = FFMAX(0, s->xma[i].skip_packets - 1);
         }
 
-        for (i = 0; i < avctx->channels / 2; i++) {
+        for (i = 0; i < (avctx->channels + 1) / 2; i++) {
             offset = FFMIN(offset, s->offset[i]);
         }
 
@@ -1803,13 +1804,15 @@ static int xma_decode_packet(AVCodecContext *avctx, void *data,
             if ((bret = ff_get_buffer(avctx, frame, 0)) < 0)
                 return bret;
 
-            for (i = 0; i < avctx->channels / 2; i++) {
+            for (i = 0; i < (avctx->channels + 1) / 2; i++) {
                 memcpy(frame->extended_data[i * 2 + 0], s->samples[i * 2 + 0], frame->nb_samples * 4);
-                memcpy(frame->extended_data[i * 2 + 1], s->samples[i * 2 + 1], frame->nb_samples * 4);
+                if (avctx->channels > 1)
+                    memcpy(frame->extended_data[i * 2 + 1], s->samples[i * 2 + 1], frame->nb_samples * 4);
                 s->offset[i] -= offset;
                 if (s->offset[i]) {
                     memmove(s->samples[i * 2 + 0], s->samples[i * 2 + 0] + frame->nb_samples, s->offset[i] * 4 * 512);
-                    memmove(s->samples[i * 2 + 1], s->samples[i * 2 + 1] + frame->nb_samples, s->offset[i] * 4 * 512);
+                    if (avctx->channels > 1)
+                        memmove(s->samples[i * 2 + 1], s->samples[i * 2 + 1] + frame->nb_samples, s->offset[i] * 4 * 512);
                 }
             }
 
@@ -1858,13 +1861,8 @@ static av_cold int xma_decode_end(AVCodecContext *avctx)
     return 0;
 }
 
-/**
- *@brief Clear decoder buffers (for seeking).
- *@param avctx codec context
- */
-static void flush(AVCodecContext *avctx)
+static void flush(WMAProDecodeCtx *s)
 {
-    WMAProDecodeCtx *s = avctx->priv_data;
     int i;
     /** reset output buffer as a part of it is used during the windowing of a
         new frame */
@@ -1872,6 +1870,30 @@ static void flush(AVCodecContext *avctx)
         memset(s->channel[i].out, 0, s->samples_per_frame *
                sizeof(*s->channel[i].out));
     s->packet_loss = 1;
+    s->skip_packets = 0;
+}
+
+
+/**
+ *@brief Clear decoder buffers (for seeking).
+ *@param avctx codec context
+ */
+static void wmapro_flush(AVCodecContext *avctx)
+{
+    WMAProDecodeCtx *s = avctx->priv_data;
+
+    flush(s);
+}
+
+static void xma_flush(AVCodecContext *avctx)
+{
+    XMADecodeCtx *s = avctx->priv_data;
+    int i;
+    for (i = 0; i < (avctx->channels + 1) / 2; i++)
+        flush(&s->xma[i]);
+
+    memset(s->offset, 0, sizeof(s->offset));
+    s->current_stream = 0;
 }
 
 
@@ -1888,7 +1910,7 @@ AVCodec ff_wmapro_decoder = {
     .close          = wmapro_decode_end,
     .decode         = wmapro_decode_packet,
     .capabilities   = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DR1,
-    .flush          = flush,
+    .flush          = wmapro_flush,
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
 };
@@ -1916,6 +1938,7 @@ AVCodec ff_xma2_decoder = {
     .init           = xma_decode_init,
     .close          = xma_decode_end,
     .decode         = xma_decode_packet,
+    .flush          = xma_flush,
     .capabilities   = AV_CODEC_CAP_SUBFRAMES | AV_CODEC_CAP_DR1,
     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },