btr support for the fecdec filter.
authorAndre Noll <maan@systemlinux.org>
Tue, 5 Jan 2010 22:08:36 +0000 (23:08 +0100)
committerAndre Noll <maan@systemlinux.org>
Tue, 5 Jan 2010 22:08:36 +0000 (23:08 +0100)
fecdec_filter.c

index 901a916..39e7816 100644 (file)
@@ -290,6 +290,7 @@ static int decode_group(struct fecdec_group *fg, struct filter_node *fn)
        size_t written, need;
        struct private_fecdec_data *pfd = fn->private_data;
        enum fec_group_usability u = group_is_usable(fg, pfd);
+       char *buf = NULL, *p;
 
        if (u == FEC_GROUP_UNUSABLE) {
                PARA_INFO_LOG("dropping unusable group %d\n", fg->h.group_num);
@@ -310,13 +311,19 @@ static int decode_group(struct fecdec_group *fg, struct filter_node *fn)
        PARA_DEBUG_LOG("writing group %d (%d/%d decoded data bytes)\n",
                fg->h.group_num, fg->h.group_bytes,
                fg->h.data_slices_per_group * sb);
-       need = fn->loaded + (fg->h.data_slices_per_group - i)* sb;
-       if (need > fn->bufsize) {
-               fn->bufsize = PARA_MAX(fn->bufsize * 2, need);
-               if (fn->bufsize > FECDEC_MAX_OUTBUF_SIZE)
-                       return -E_FECDEC_OVERRUN;
-               PARA_INFO_LOG("increasing fec buf to %zu\n", fn->bufsize);
-               fn->buf = para_realloc(fn->buf, fn->bufsize);
+       need = fn->loaded + (fg->h.data_slices_per_group - i) * sb;
+       if (fn->btrn) {
+               buf = para_malloc(need);
+               p = buf;
+       } else {
+               if (need > fn->bufsize) {
+                       fn->bufsize = PARA_MAX(fn->bufsize * 2, need);
+                       if (fn->bufsize > FECDEC_MAX_OUTBUF_SIZE)
+                               return -E_FECDEC_OVERRUN;
+                       PARA_INFO_LOG("increasing fec buf to %zu\n", fn->bufsize);
+                       fn->buf = para_realloc(fn->buf, fn->bufsize);
+               }
+               p = fn->buf + fn->loaded;
        }
        if (u == FEC_GROUP_USABLE_WITH_HEADER) {
                PARA_INFO_LOG("writing audio file header\n");
@@ -327,20 +334,24 @@ static int decode_group(struct fecdec_group *fg, struct filter_node *fn)
                                break;
                        if (sb + written > fg->h.audio_header_size)
                                n = fg->h.audio_header_size - written;
-                       memcpy(fn->buf + fn->loaded, fg->data[i], n);
+                       memcpy(p + written, fg->data[i], n);
                        fn->loaded += n;
                        written += n;
                }
+               p += written;
        }
        written = 0;
        for (; i < fg->h.data_slices_per_group; i++) {
                size_t n = sb;
                if (n + written > fg->h.group_bytes)
                        n = fg->h.group_bytes - written;
-               memcpy(fn->buf + fn->loaded, fg->data[i], n);
+               memcpy(p + written, fg->data[i], n);
                fn->loaded += n;
                written += n;
        }
+       p += written;
+       if (fn->btrn)
+               btr_add_output(buf, p - buf, fn->btrn);
        return 0;
 }
 
@@ -385,8 +396,11 @@ static int dispatch_slice(char *buf, size_t len, struct fec_header *h,
        int ret, k, n;
        struct private_fecdec_data *pfd = fn->private_data;
 
-       if (h->slice_bytes > len) /* can not use the thing, try to read more */
+       PARA_CRIT_LOG("sb: %d, len: %d\n", h->slice_bytes, len);
+       if (h->slice_bytes > len) { /* can not use the thing, try to read more */
+               fn->min_iqs = h->slice_bytes + FEC_HEADER_SIZE;
                return 0;
+       }
        ret = get_group(h, pfd, &fg);
        if (ret < 0)
                return ret;
@@ -458,6 +472,44 @@ static void fecdec_close(struct filter_node *fn)
        fec_free(pfd->fec);
        free(fn->private_data);
        fn->private_data = NULL;
+       fn->conf = NULL;
+}
+
+static void fecdec_post_select(__a_unused struct sched *s, struct task *t)
+{
+       struct filter_node *fn = container_of(t, struct filter_node, task);
+       struct btr_node *btrn = fn->btrn;
+       int ret;
+       struct fec_header h;
+       char *buf;
+       size_t len;
+
+next_buffer:
+       ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
+       if (ret <= 0)
+               goto out;
+       btr_merge(btrn, fn->min_iqs);
+       len = btr_next_buffer(btrn, &buf);
+       ret = read_fec_header(buf, len, &h);
+       if (ret <= 0)
+               goto out;
+       ret = -E_BAD_SLICE_SIZE;
+       if (!h.slice_bytes)
+               goto out;
+       ret = -E_BAD_SLICE_NUM;
+       if (h.slice_num > h.slices_per_group)
+               goto out;
+       ret = dispatch_slice(buf + FEC_HEADER_SIZE, len - FEC_HEADER_SIZE,
+               &h, fn);
+       //PARA_INFO_LOG("ret: %d, len: %d, slice_bytes: %d\n", ret, len, h.slice_bytes);
+       if (ret <= 0)
+               goto out;
+       btr_consume(btrn, FEC_HEADER_SIZE + h.slice_bytes);
+       goto next_buffer;
+out:
+       t->error = ret;
+       if (ret < 0)
+               btr_remove_node(btrn);
 }
 
 static void fecdec_open(struct filter_node *fn)
@@ -468,16 +520,19 @@ static void fecdec_open(struct filter_node *fn)
        pfd = para_calloc(sizeof(*pfd));
        fn->private_data = pfd;
        fn->loaded = 0;
+       fn->min_iqs = FEC_HEADER_SIZE;
 }
 
 /**
  * The init function of the fecdec filter.
  *
- * \param f struct to initialize.
+ * \param f Struct to initialize.
  */
 void fecdec_filter_init(struct filter *f)
 {
        f->convert = fecdec;
        f->close = fecdec_close;
        f->open = fecdec_open;
+       f->pre_select = generic_filter_pre_select;
+       f->post_select = fecdec_post_select;
 }