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input_stream: return allocated input_stream objects

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Major API redesign: don't let the caller allocate the input_stream
object.  Let each input plugin allocate its own (derived/extended)
input_stream pointer.  The "data" attribute can now be removed, and
all input plugins simply cast the input_stream pointer to their own
structure (with an "struct input_stream base" as the first attribute).
This commit is contained in:
Max Kellermann
2009-12-30 23:27:37 +01:00
parent 816b6ad4a7
commit d3b763a48c
25 changed files with 315 additions and 326 deletions
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97
src/input/curl_input_plugin.c
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@@ -57,6 +57,8 @@ struct buffer {
};
struct input_curl {
struct input_stream base;
/* some buffers which were passed to libcurl, which we have
too free */
char *url, *range;
@@ -179,10 +181,8 @@ input_curl_easy_free(struct input_curl *c)
* Frees this stream (but not the input_stream struct itself).
*/
static void
input_curl_free(struct input_stream *is)
input_curl_free(struct input_curl *c)
{
struct input_curl *c = is->data;
if (c->tag != NULL)
tag_free(c->tag);
g_free(c->meta_name);
@@ -201,7 +201,7 @@ input_curl_free(struct input_stream *is)
static struct tag *
input_curl_tag(struct input_stream *is)
{
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)is;
struct tag *tag = c->tag;
c->tag = NULL;
@@ -209,9 +209,8 @@ input_curl_tag(struct input_stream *is)
}
static bool
input_curl_multi_info_read(struct input_stream *is, GError **error_r)
input_curl_multi_info_read(struct input_curl *c, GError **error_r)
{
struct input_curl *c = is->data;
CURLMsg *msg;
int msgs_in_queue;
@@ -219,7 +218,7 @@ input_curl_multi_info_read(struct input_stream *is, GError **error_r)
&msgs_in_queue)) != NULL) {
if (msg->msg == CURLMSG_DONE) {
c->eof = true;
is->ready = true;
c->base.ready = true;
if (msg->data.result != CURLE_OK) {
g_set_error(error_r, curl_quark(),
@@ -279,7 +278,7 @@ input_curl_select(struct input_curl *c, GError **error_r)
static bool
fill_buffer(struct input_stream *is, GError **error_r)
{
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)is;
CURLMcode mcode = CURLM_CALL_MULTI_PERFORM;
while (!c->eof && g_queue_is_empty(c->buffers)) {
@@ -305,7 +304,7 @@ fill_buffer(struct input_stream *is, GError **error_r)
return false;
}
bret = input_curl_multi_info_read(is, error_r);
bret = input_curl_multi_info_read(c, error_r);
if (!bret)
return false;
}
@@ -407,7 +406,7 @@ static size_t
input_curl_read(struct input_stream *is, void *ptr, size_t size,
GError **error_r)
{
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)is;
bool success;
size_t nbytes = 0;
char *dest = ptr;
@@ -441,13 +440,15 @@ input_curl_read(struct input_stream *is, void *ptr, size_t size,
static void
input_curl_close(struct input_stream *is)
{
input_curl_free(is);
struct input_curl *c = (struct input_curl *)is;
input_curl_free(c);
}
static bool
input_curl_eof(G_GNUC_UNUSED struct input_stream *is)
{
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)is;
return c->eof && g_queue_is_empty(c->buffers);
}
@@ -455,7 +456,7 @@ input_curl_eof(G_GNUC_UNUSED struct input_stream *is)
static int
input_curl_buffer(struct input_stream *is, GError **error_r)
{
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)is;
CURLMcode mcode;
int running_handles;
bool ret;
@@ -483,7 +484,7 @@ input_curl_buffer(struct input_stream *is, GError **error_r)
return -1;
}
ret = input_curl_multi_info_read(is, error_r);
ret = input_curl_multi_info_read(c, error_r);
if (!ret)
return -1;
@@ -494,8 +495,7 @@ input_curl_buffer(struct input_stream *is, GError **error_r)
static size_t
input_curl_headerfunction(void *ptr, size_t size, size_t nmemb, void *stream)
{
struct input_stream *is = stream;
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)stream;
const char *header = ptr, *end, *value;
char name[64];
@@ -524,7 +524,7 @@ input_curl_headerfunction(void *ptr, size_t size, size_t nmemb, void *stream)
if (g_ascii_strcasecmp(name, "accept-ranges") == 0) {
/* a stream with icy-metadata is not seekable */
if (!icy_defined(&c->icy_metadata))
is->seekable = true;
c->base.seekable = true;
} else if (g_ascii_strcasecmp(name, "content-length") == 0) {
char buffer[64];
@@ -534,10 +534,10 @@ input_curl_headerfunction(void *ptr, size_t size, size_t nmemb, void *stream)
memcpy(buffer, value, end - value);
buffer[end - value] = 0;
is->size = is->offset + g_ascii_strtoull(buffer, NULL, 10);
c->base.size = c->base.offset + g_ascii_strtoull(buffer, NULL, 10);
} else if (g_ascii_strcasecmp(name, "content-type") == 0) {
g_free(is->mime);
is->mime = g_strndup(value, end - value);
g_free(c->base.mime);
c->base.mime = g_strndup(value, end - value);
} else if (g_ascii_strcasecmp(name, "icy-name") == 0 ||
g_ascii_strcasecmp(name, "ice-name") == 0 ||
g_ascii_strcasecmp(name, "x-audiocast-name") == 0) {
@@ -568,7 +568,7 @@ input_curl_headerfunction(void *ptr, size_t size, size_t nmemb, void *stream)
/* a stream with icy-metadata is not
seekable */
is->seekable = false;
c->base.seekable = false;
}
}
@@ -579,8 +579,7 @@ input_curl_headerfunction(void *ptr, size_t size, size_t nmemb, void *stream)
static size_t
input_curl_writefunction(void *ptr, size_t size, size_t nmemb, void *stream)
{
struct input_stream *is = stream;
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)stream;
struct buffer *buffer;
size *= nmemb;
@@ -594,15 +593,14 @@ input_curl_writefunction(void *ptr, size_t size, size_t nmemb, void *stream)
g_queue_push_tail(c->buffers, buffer);
c->buffered = true;
is->ready = true;
c->base.ready = true;
return size;
}
static bool
input_curl_easy_init(struct input_stream *is, GError **error_r)
input_curl_easy_init(struct input_curl *c, GError **error_r)
{
struct input_curl *c = is->data;
CURLcode code;
CURLMcode mcode;
@@ -627,10 +625,10 @@ input_curl_easy_init(struct input_stream *is, GError **error_r)
"Music Player Daemon " VERSION);
curl_easy_setopt(c->easy, CURLOPT_HEADERFUNCTION,
input_curl_headerfunction);
curl_easy_setopt(c->easy, CURLOPT_WRITEHEADER, is);
curl_easy_setopt(c->easy, CURLOPT_WRITEHEADER, c);
curl_easy_setopt(c->easy, CURLOPT_WRITEFUNCTION,
input_curl_writefunction);
curl_easy_setopt(c->easy, CURLOPT_WRITEDATA, is);
curl_easy_setopt(c->easy, CURLOPT_WRITEDATA, c);
curl_easy_setopt(c->easy, CURLOPT_HTTP200ALIASES, http_200_aliases);
curl_easy_setopt(c->easy, CURLOPT_FOLLOWLOCATION, 1);
curl_easy_setopt(c->easy, CURLOPT_MAXREDIRS, 5);
@@ -669,9 +667,9 @@ input_curl_easy_init(struct input_stream *is, GError **error_r)
void
input_curl_reinit(struct input_stream *is)
{
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)is;
assert(is->plugin == &input_plugin_curl);
assert(c->base.plugin == &input_plugin_curl);
assert(c->easy != NULL);
curl_easy_setopt(c->easy, CURLOPT_WRITEHEADER, is);
@@ -702,7 +700,7 @@ static bool
input_curl_seek(struct input_stream *is, goffset offset, int whence,
GError **error_r)
{
struct input_curl *c = is->data;
struct input_curl *c = (struct input_curl *)is;
bool ret;
assert(is->ready);
@@ -774,7 +772,7 @@ input_curl_seek(struct input_stream *is, goffset offset, int whence,
return true;
}
ret = input_curl_easy_init(is, error_r);
ret = input_curl_easy_init(c, error_r);
if (!ret)
return false;
@@ -789,55 +787,54 @@ input_curl_seek(struct input_stream *is, goffset offset, int whence,
if (!ret)
return false;
return input_curl_multi_info_read(is, error_r);
return input_curl_multi_info_read(c, error_r);
}
static bool
input_curl_open(struct input_stream *is, const char *url, GError **error_r)
static struct input_stream *
input_curl_open(const char *url, GError **error_r)
{
struct input_curl *c;
bool ret;
if (strncmp(url, "http://", 7) != 0)
return false;
return NULL;
c = g_new0(struct input_curl, 1);
input_stream_init(&c->base, &input_plugin_curl);
c->url = g_strdup(url);
c->buffers = g_queue_new();
is->plugin = &input_plugin_curl;
is->data = c;
c->multi = curl_multi_init();
if (c->multi == NULL) {
g_set_error(error_r, curl_quark(), 0,
"curl_multi_init() failed");
input_curl_free(is);
return false;
input_curl_free(c);
return NULL;
}
icy_clear(&c->icy_metadata);
c->tag = NULL;
ret = input_curl_easy_init(is, error_r);
ret = input_curl_easy_init(c, error_r);
if (!ret) {
input_curl_free(is);
return false;
input_curl_free(c);
return NULL;
}
ret = input_curl_send_request(c, error_r);
if (!ret) {
input_curl_free(is);
return false;
input_curl_free(c);
return NULL;
}
ret = input_curl_multi_info_read(is, error_r);
ret = input_curl_multi_info_read(c, error_r);
if (!ret) {
input_curl_free(is);
return false;
input_curl_free(c);
return NULL;
}
return true;
return &c->base;
}
const struct input_plugin input_plugin_curl = {