stream cipher: Allow in-place encryption.

[paraslash.git] / mp3dec_filter.c

diff --git a/mp3dec_filter.c b/mp3dec_filter.c
index bff42090158d4929cab5e7cbdfdcf20aff864bdf..82f014189d3ccb8ece45652ec17fa80c9a3ee6b6 100644 (file)
--- a/mp3dec_filter.c
+++ b/mp3dec_filter.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2011 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
@@ -50,7 +50,7 @@ struct private_mp3dec_data {
        /** The number of channels of the current stream. */
        unsigned int channels;
        /** Current sample rate in Hz. */
-       unsigned int samplerate;
+       unsigned int sample_rate;
 };
 
 static int need_bad_data_delay(struct private_mp3dec_data *pmd,
@@ -131,15 +131,21 @@ next_buffer:
        pmd->stream.error = 0;
        t->error = 0;
        iqs = btr_get_input_queue_size(btrn);
-       if (need_bad_data_delay(pmd, iqs))
-               return;
        ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
        if (ret < 0)
                goto err;
+       if (need_bad_data_delay(pmd, iqs))
+               return;
        if (ret == 0)
                return;
        btr_merge(btrn, fn->min_iqs);
        len = btr_next_buffer(btrn, &inbuffer);
+       /*
+        * Decode at most 8K in one go to give the post_select() functions of
+        * other buffer tree nodes a chance to run. This is necessary to avoid
+        * buffer underruns on slow machines.
+        */
+       len = PARA_MIN(len, (size_t)8192);
        mad_stream_buffer(&pmd->stream, (unsigned char *)inbuffer, len);
 next_frame:
        ret = mad_header_decode(&pmd->frame.header, &pmd->stream);
@@ -159,7 +165,7 @@ next_frame:
                goto next_buffer;
        }
        fn->min_iqs = 0;
-       pmd->samplerate = pmd->frame.header.samplerate;
+       pmd->sample_rate = pmd->frame.header.samplerate;
        pmd->channels = MAD_NCHANNELS(&pmd->frame.header);
        ret = mad_frame_decode(&pmd->frame, &pmd->stream);
        if (ret != 0) {
@@ -230,19 +236,7 @@ static int mp3dec_execute(struct btr_node *btrn, const char *cmd, char **result)
        struct filter_node *fn = btr_context(btrn);
        struct private_mp3dec_data *pmd = fn->private_data;
 
-       if (!strcmp(cmd, "samplerate")) {
-               if (pmd->samplerate == 0)
-                       return -ERRNO_TO_PARA_ERROR(ENAVAIL);
-               *result = make_message("%u", pmd->samplerate);
-               return 1;
-       }
-       if (!strcmp(cmd, "channels")) {
-               if (pmd->channels == 0)
-                       return -ERRNO_TO_PARA_ERROR(ENAVAIL);
-               *result = make_message("%u", pmd->channels);
-               return 1;
-       }
-       return -ERRNO_TO_PARA_ERROR(ENOTSUP);
+       return decoder_execute(cmd, pmd->sample_rate, pmd->channels, result);
 }
 
 static void mp3dec_free_config(void *conf)