btr support for the wmadec filter.

[paraslash.git] / wmadec_filter.c

diff --git a/wmadec_filter.c b/wmadec_filter.c
index b78d762792511890531c891a5027dee563cda195..4bbc24137e7e64f0af2246b515417cc3e6665c5c 100644 (file)
--- a/wmadec_filter.c
+++ b/wmadec_filter.c
@@ -25,6 +25,7 @@
 #include <string.h>
 #include <regex.h>
 #include <sys/select.h>
+#include <stdbool.h>
 
 #include "para.h"
 #include "error.h"
@@ -32,6 +33,7 @@
 #include "ggo.h"
 #include "string.h"
 #include "sched.h"
+#include "buffer_tree.h"
 #include "filter.h"
 #include "bitstream.h"
 #include "imdct.h"
@@ -1190,6 +1192,120 @@ fail:
        return ret;
 }
 
+static void wmadec_close(struct filter_node *fn)
+{
+       struct private_wmadec_data *pwd = fn->private_data;
+
+       if (!pwd)
+               return;
+       wmadec_cleanup(pwd);
+       free(fn->buf);
+       fn->buf = NULL;
+       free(fn->private_data);
+       fn->private_data = NULL;
+}
+
+static int wmadec_execute(struct btr_node *btrn, const char *cmd, char **result)
+{
+       struct filter_node *fn = btr_context(btrn);
+       struct private_wmadec_data *pwd = fn->private_data;
+
+       if (!strcmp(cmd, "samplerate")) {
+               if (pwd->ahi.sample_rate == 0)
+                       return -ERRNO_TO_PARA_ERROR(ENAVAIL);
+               *result = make_message("%u", pwd->ahi.sample_rate);
+               return 1;
+       }
+       if (!strcmp(cmd, "channels")) {
+               if (pwd->ahi.channels == 0)
+                       return -ERRNO_TO_PARA_ERROR(ENAVAIL);
+               *result = make_message("%u", pwd->ahi.channels);
+               return 1;
+       }
+       return -ERRNO_TO_PARA_ERROR(ENOTSUP);
+}
+
+#define WMADEC_MAX_PENDING (640 * 1024)
+
+static void wmadec_pre_select(struct sched *s, struct task *t)
+{
+       struct filter_node *fn = container_of(t, struct filter_node, task);
+       size_t iqs = btr_get_input_queue_size(fn->btrn);
+
+       t->error = 0;
+       if (iqs == 0)
+               return;
+       if (btr_bytes_pending(fn->btrn) > WMADEC_MAX_PENDING)
+               return; /* FIXME, should use reasonable bound on timeout */
+       s->timeout.tv_sec = 0;
+       s->timeout.tv_usec = 1;
+}
+
+#define WMA_OUTPUT_BUFFER_SIZE (128 * 1024)
+
+static void wmadec_post_select(__a_unused struct sched *s, struct task *t)
+{
+       struct filter_node *fn = container_of(t, struct filter_node, task);
+       int ret, converted = 0;
+       struct private_wmadec_data *pwd = fn->private_data;
+       struct btr_node *btrn = fn->btrn;
+       size_t iqs, len, min_len;
+       char *in;
+
+       min_len = pwd? WMA_FRAME_SKIP + pwd->ahi.block_align : 8192;
+next_buffer:
+       t->error = 0;
+       if (btr_bytes_pending(btrn) > WMADEC_MAX_PENDING)
+               return;
+       iqs = btr_get_input_queue_size(btrn);
+       if (iqs < min_len) {
+               if (!btr_no_parent(btrn)) /* wait for more data */
+                       return;
+               ret = -E_WMADEC_EOF;
+               goto err;
+       }
+       /* avoid "buffer too small" errors from the decoder */
+       btr_merge_to(btrn, min_len);
+       len = btr_next_buffer(btrn, &in);
+       assert(len >= min_len);
+       if (!pwd) {
+               ret = wma_decode_init(in, len, &pwd);
+               if (ret < 0)
+                       goto err;
+               if (ret == 0) {
+                       min_len += 4096;
+                       goto next_buffer;
+               }
+               fn->private_data = pwd;
+               converted = pwd->ahi.header_len;
+               goto success;
+       }
+       for (;;) {
+               char *out;
+               int out_size = WMA_OUTPUT_BUFFER_SIZE;
+               if (converted + WMA_FRAME_SKIP + pwd->ahi.block_align > len)
+                       break;
+               out = para_malloc(WMA_OUTPUT_BUFFER_SIZE);
+               ret = wma_decode_superframe(pwd, out,
+                       &out_size, (uint8_t *)in + converted + WMA_FRAME_SKIP,
+                       len - WMA_FRAME_SKIP);
+               if (ret < 0) {
+                       free(out);
+                       goto err;
+               }
+               btr_add_output(out, out_size, btrn);
+               converted += ret + WMA_FRAME_SKIP;
+       }
+success:
+       btr_consume(btrn, converted);
+       goto next_buffer;
+err:
+       assert(ret < 0);
+       wmadec_close(fn);
+       t->error = ret;
+       btr_del_node(btrn);
+}
+
 static ssize_t wmadec_convert(char *inbuffer, size_t len,
                struct filter_node *fn)
 {
@@ -1225,19 +1341,6 @@ static ssize_t wmadec_convert(char *inbuffer, size_t len,
        return converted;
 }
 
-static void wmadec_close(struct filter_node *fn)
-{
-       struct private_wmadec_data *pwd = fn->private_data;
-
-       if (!pwd)
-               return;
-       wmadec_cleanup(pwd);
-       free(fn->buf);
-       fn->buf = NULL;
-       free(fn->private_data);
-       fn->private_data = NULL;
-}
-
 static void wmadec_open(struct filter_node *fn)
 {
        fn->bufsize = 1024 * 1024;
@@ -1256,4 +1359,7 @@ void wmadec_filter_init(struct filter *f)
        f->open = wmadec_open;
        f->close = wmadec_close;
        f->convert = wmadec_convert;
+       f->execute = wmadec_execute;
+       f->pre_select = wmadec_pre_select;
+       f->post_select = wmadec_post_select;
 }