Improve av_resample() documentation

[ffmpeg] / ffplay.c

diff --git a/ffplay.c b/ffplay.c
index 2e2149e9a24f897db7c14a4c920196dcbc3590db..e65226a45391fe9c13f540ad7e61d30cc226b9e4 100644 (file)
--- a/ffplay.c
+++ b/ffplay.c
@@ -168,6 +168,7 @@ typedef struct VideoState {
     int last_i_start;
     RDFTContext *rdft;
     int rdft_bits;
+    FFTSample *rdft_data;
     int xpos;
 
     SDL_Thread *subtitle_tid;
@@ -917,12 +918,15 @@ static void video_audio_display(VideoState *s)
         nb_display_channels= FFMIN(nb_display_channels, 2);
         if(rdft_bits != s->rdft_bits){
             av_rdft_end(s->rdft);
+            av_free(s->rdft_data);
             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
             s->rdft_bits= rdft_bits;
+            s->rdft_data= av_malloc(4*nb_freq*sizeof(*s->rdft_data));
         }
         {
-            FFTSample data[2][2*nb_freq];
+            FFTSample *data[2];
             for(ch = 0;ch < nb_display_channels; ch++) {
+                data[ch] = s->rdft_data + 2*nb_freq*ch;
                 i = i_start + ch;
                 for(x = 0; x < 2*nb_freq; x++) {
                     double w= (x-nb_freq)*(1.0/nb_freq);
@@ -1600,6 +1604,7 @@ static int input_get_buffer(AVCodecContext *codec, AVFrame *pic)
     pic->opaque = ref;
     pic->age    = INT_MAX;
     pic->type   = FF_BUFFER_TYPE_USER;
+    pic->reordered_opaque = codec->reordered_opaque;
     return 0;
 }
 
@@ -1609,6 +1614,25 @@ static void input_release_buffer(AVCodecContext *codec, AVFrame *pic)
     avfilter_unref_pic(pic->opaque);
 }
 
+static int input_reget_buffer(AVCodecContext *codec, AVFrame *pic)
+{
+    AVFilterPicRef *ref = pic->opaque;
+
+    if (pic->data[0] == NULL) {
+        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
+        return codec->get_buffer(codec, pic);
+    }
+
+    if ((codec->width != ref->w) || (codec->height != ref->h) ||
+        (codec->pix_fmt != ref->pic->format)) {
+        av_log(codec, AV_LOG_ERROR, "Picture properties changed.\n");
+        return -1;
+    }
+
+    pic->reordered_opaque = codec->reordered_opaque;
+    return 0;
+}
+
 static int input_init(AVFilterContext *ctx, const char *args, void *opaque)
 {
     FilterPriv *priv = ctx->priv;
@@ -1622,6 +1646,7 @@ static int input_init(AVFilterContext *ctx, const char *args, void *opaque)
         priv->use_dr1 = 1;
         codec->get_buffer     = input_get_buffer;
         codec->release_buffer = input_release_buffer;
+        codec->reget_buffer   = input_reget_buffer;
     }
 
     priv->frame = avcodec_alloc_frame();