mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-29 21:21:12 +00:00
Made pipefilter a DECOUPLED element.
Original commit message from CVS: Made pipefilter a DECOUPLED element.
This commit is contained in:
Wim Taymans
parent
c021af86ec
commit
8a89e0b83e
2 changed files with 180 additions and 108 deletions
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@ -38,7 +38,8 @@ GstElementDetails gst_pipefilter_details = {
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"Filter",
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"Pass data without modification",
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VERSION,
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"Erik Walthinsen <omega@cse.ogi.edu>",
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"Erik Walthinsen <omega@cse.ogi.edu>\n"
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"Wim Taymans <wim.taymans@chello.be>",
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"(C) 1999",
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};
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@ -57,10 +58,13 @@ enum {
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static void gst_pipefilter_class_init (GstPipefilterClass *klass);
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static void gst_pipefilter_init (GstPipefilter *pipefilter);
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static void gst_pipefilter_set_arg (GtkObject *object, GtkArg *arg, guint id);
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static void gst_pipefilter_get_arg (GtkObject *object, GtkArg *arg, guint id);
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void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf);
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static GstBuffer* gst_pipefilter_get (GstPad *pad);
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static void gst_pipefilter_chain (GstPad *pad, GstBuffer *buf);
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static gboolean gst_pipefilter_handle_eos (GstPad *pad);
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static GstElementStateReturn gst_pipefilter_change_state (GstElement *element);
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@ -68,7 +72,8 @@ static GstElementClass *parent_class = NULL;
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//static guint gst_pipefilter_signals[LAST_SIGNAL] = { 0 };
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GtkType
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gst_pipefilter_get_type(void) {
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gst_pipefilter_get_type (void)
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{
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static GtkType pipefilter_type = 0;
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if (!pipefilter_type) {
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@ -87,7 +92,9 @@ gst_pipefilter_get_type(void) {
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return pipefilter_type;
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}
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static void gst_pipefilter_class_init(GstPipefilterClass *klass) {
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static void
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gst_pipefilter_class_init (GstPipefilterClass *klass)
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{
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GtkObjectClass *gtkobject_class;
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GstElementClass *gstelement_class;
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@ -105,12 +112,19 @@ static void gst_pipefilter_class_init(GstPipefilterClass *klass) {
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gtkobject_class->get_arg = gst_pipefilter_get_arg;
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}
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static void gst_pipefilter_init(GstPipefilter *pipefilter) {
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static void
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gst_pipefilter_init (GstPipefilter *pipefilter)
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{
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GST_FLAG_SET (pipefilter, GST_ELEMENT_DECOUPLED);
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pipefilter->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
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gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->sinkpad);
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gst_pad_set_chain_function (pipefilter->sinkpad, gst_pipefilter_chain);
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gst_pad_set_eos_function (pipefilter->sinkpad, gst_pipefilter_handle_eos);
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pipefilter->srcpad = gst_pad_new ("src", GST_PAD_SRC);
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gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->srcpad);
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gst_pad_set_get_function (pipefilter->srcpad, gst_pipefilter_get);
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pipefilter->command = NULL;
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pipefilter->curoffset = 0;
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@ -118,51 +132,67 @@ static void gst_pipefilter_init(GstPipefilter *pipefilter) {
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pipefilter->seq = 0;
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}
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static gboolean gst_pipefilter_read_and_push(GstPipefilter *pipefilter) {
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static gboolean
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gst_pipefilter_handle_eos (GstPad *pad)
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{
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GstPipefilter *pipefilter;
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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GST_DEBUG (0,"pipefilter: %s received eos\n", GST_ELEMENT_NAME (pipefilter));
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if (close (pipefilter->fdin[1]) < 0)
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perror("close");
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if (close (pipefilter->fdout[0]) < 0)
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perror("close");
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GST_FLAG_SET (pad, GST_PAD_EOS);
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return TRUE;
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}
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static GstBuffer*
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gst_pipefilter_get (GstPad *pad)
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{
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GstPipefilter *pipefilter;
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GstBuffer *newbuf;
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glong readbytes;
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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/* create the buffer */
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// FIXME: should eventually use a bufferpool for this
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newbuf = gst_buffer_new();
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g_return_val_if_fail(newbuf, FALSE);
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g_return_val_if_fail(newbuf, NULL);
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/* allocate the space for the buffer data */
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GST_BUFFER_DATA(newbuf) = g_malloc(pipefilter->bytes_per_read);
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g_return_val_if_fail(GST_BUFFER_DATA(newbuf) != NULL, FALSE);
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g_return_val_if_fail(GST_BUFFER_DATA(newbuf) != NULL, NULL);
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/* read it in from the file */
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GST_DEBUG (0,"attemting to read %ld bytes\n", pipefilter->bytes_per_read);
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readbytes = read(pipefilter->fdout[0], GST_BUFFER_DATA(newbuf), pipefilter->bytes_per_read);
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GST_DEBUG (0,"read %ld bytes\n", readbytes);
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if (readbytes < 0) {
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if (errno == EAGAIN) {
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GST_DEBUG (0,"no input yet\n");
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gst_buffer_unref(newbuf);
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return FALSE;
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}
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else {
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perror("read");
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gst_element_error(GST_ELEMENT(pipefilter),"reading");
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return FALSE;
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}
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}
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if (readbytes == 0) {
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gst_buffer_unref(newbuf);
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return FALSE;
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return NULL;
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}
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/* if we didn't get as many bytes as we asked for, we're at EOF */
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if (readbytes < pipefilter->bytes_per_read)
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GST_BUFFER_FLAG_SET(newbuf,GST_BUFFER_EOS);
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if (readbytes == 0) {
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gst_pad_set_eos (pad);
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return NULL;
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}
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GST_BUFFER_OFFSET(newbuf) = pipefilter->curoffset;
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GST_BUFFER_SIZE(newbuf) = readbytes;
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pipefilter->curoffset += readbytes;
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/* we're done, push the buffer off now */
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gst_pad_push(pipefilter->srcpad,newbuf);
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return TRUE;
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return newbuf;
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}
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void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf) {
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static void
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gst_pipefilter_chain (GstPad *pad,GstBuffer *buf)
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{
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GstPipefilter *pipefilter;
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glong writebytes;
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guchar *data;
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@ -174,8 +204,6 @@ void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf) {
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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while (gst_pipefilter_read_and_push(pipefilter));
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data = GST_BUFFER_DATA(buf);
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size = GST_BUFFER_SIZE(buf);
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@ -188,11 +216,11 @@ void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf) {
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return;
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}
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gst_buffer_unref(buf);
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while (gst_pipefilter_read_and_push(pipefilter));
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}
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static void gst_pipefilter_set_arg(GtkObject *object,GtkArg *arg,guint id) {
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static void
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gst_pipefilter_set_arg (GtkObject *object,GtkArg *arg,guint id)
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{
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GstPipefilter *pipefilter;
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/* it's not null if we got it, but it might not be ours */
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@ -209,7 +237,9 @@ static void gst_pipefilter_set_arg(GtkObject *object,GtkArg *arg,guint id) {
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}
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}
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static void gst_pipefilter_get_arg(GtkObject *object,GtkArg *arg,guint id) {
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static void
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gst_pipefilter_get_arg (GtkObject *object,GtkArg *arg,guint id)
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{
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GstPipefilter *pipefilter;
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/* it's not null if we got it, but it might not be ours */
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@ -227,18 +257,14 @@ static void gst_pipefilter_get_arg(GtkObject *object,GtkArg *arg,guint id) {
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}
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/* open the file, necessary to go to RUNNING state */
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static gboolean gst_pipefilter_open_file(GstPipefilter *src) {
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static gboolean
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gst_pipefilter_open_file (GstPipefilter *src)
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{
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g_return_val_if_fail(!GST_FLAG_IS_SET(src,GST_PIPEFILTER_OPEN), FALSE);
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pipe(src->fdin);
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pipe(src->fdout);
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if (fcntl(src->fdout[0], F_SETFL, O_NONBLOCK) < 0) {
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perror("fcntl");
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gst_element_error(GST_ELEMENT(src),"fcntl");
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return FALSE;
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}
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if((src->childpid = fork()) == -1)
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{
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perror("fork");
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@ -248,6 +274,8 @@ static gboolean gst_pipefilter_open_file(GstPipefilter *src) {
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if(src->childpid == 0)
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{
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close(src->fdin[1]);
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close(src->fdout[0]);
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// child
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dup2(src->fdin[0], STDIN_FILENO); /* set the childs input stream */
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dup2(src->fdout[1], STDOUT_FILENO); /* set the childs output stream */
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@ -258,13 +286,19 @@ static gboolean gst_pipefilter_open_file(GstPipefilter *src) {
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return FALSE;
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}
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else {
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close(src->fdin[0]);
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close(src->fdout[1]);
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}
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GST_FLAG_SET(src,GST_PIPEFILTER_OPEN);
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return TRUE;
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}
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/* close the file */
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static void gst_pipefilter_close_file(GstPipefilter *src) {
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static void
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gst_pipefilter_close_file (GstPipefilter *src)
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{
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g_return_if_fail(GST_FLAG_IS_SET(src,GST_PIPEFILTER_OPEN));
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/* close the file */
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@ -280,7 +314,9 @@ static void gst_pipefilter_close_file(GstPipefilter *src) {
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GST_FLAG_UNSET(src,GST_PIPEFILTER_OPEN);
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}
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static GstElementStateReturn gst_pipefilter_change_state(GstElement *element) {
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static GstElementStateReturn
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gst_pipefilter_change_state (GstElement *element)
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{
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g_return_val_if_fail(GST_IS_PIPEFILTER(element), FALSE);
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/* if going down into NULL state, close the file if it's open */
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@ -38,7 +38,8 @@ GstElementDetails gst_pipefilter_details = {
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"Filter",
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"Pass data without modification",
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VERSION,
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"Erik Walthinsen <omega@cse.ogi.edu>",
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"Erik Walthinsen <omega@cse.ogi.edu>\n"
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"Wim Taymans <wim.taymans@chello.be>",
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"(C) 1999",
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};
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@ -57,10 +58,13 @@ enum {
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static void gst_pipefilter_class_init (GstPipefilterClass *klass);
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static void gst_pipefilter_init (GstPipefilter *pipefilter);
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static void gst_pipefilter_set_arg (GtkObject *object, GtkArg *arg, guint id);
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static void gst_pipefilter_get_arg (GtkObject *object, GtkArg *arg, guint id);
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void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf);
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static GstBuffer* gst_pipefilter_get (GstPad *pad);
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static void gst_pipefilter_chain (GstPad *pad, GstBuffer *buf);
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static gboolean gst_pipefilter_handle_eos (GstPad *pad);
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static GstElementStateReturn gst_pipefilter_change_state (GstElement *element);
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@ -68,7 +72,8 @@ static GstElementClass *parent_class = NULL;
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//static guint gst_pipefilter_signals[LAST_SIGNAL] = { 0 };
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GtkType
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gst_pipefilter_get_type(void) {
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gst_pipefilter_get_type (void)
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{
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static GtkType pipefilter_type = 0;
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if (!pipefilter_type) {
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@ -87,7 +92,9 @@ gst_pipefilter_get_type(void) {
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return pipefilter_type;
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}
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static void gst_pipefilter_class_init(GstPipefilterClass *klass) {
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static void
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gst_pipefilter_class_init (GstPipefilterClass *klass)
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{
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GtkObjectClass *gtkobject_class;
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GstElementClass *gstelement_class;
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@ -105,12 +112,19 @@ static void gst_pipefilter_class_init(GstPipefilterClass *klass) {
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gtkobject_class->get_arg = gst_pipefilter_get_arg;
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}
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static void gst_pipefilter_init(GstPipefilter *pipefilter) {
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static void
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gst_pipefilter_init (GstPipefilter *pipefilter)
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{
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GST_FLAG_SET (pipefilter, GST_ELEMENT_DECOUPLED);
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pipefilter->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
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gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->sinkpad);
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gst_pad_set_chain_function (pipefilter->sinkpad, gst_pipefilter_chain);
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gst_pad_set_eos_function (pipefilter->sinkpad, gst_pipefilter_handle_eos);
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pipefilter->srcpad = gst_pad_new ("src", GST_PAD_SRC);
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gst_element_add_pad (GST_ELEMENT (pipefilter), pipefilter->srcpad);
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gst_pad_set_get_function (pipefilter->srcpad, gst_pipefilter_get);
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pipefilter->command = NULL;
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pipefilter->curoffset = 0;
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@ -118,51 +132,67 @@ static void gst_pipefilter_init(GstPipefilter *pipefilter) {
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pipefilter->seq = 0;
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}
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static gboolean gst_pipefilter_read_and_push(GstPipefilter *pipefilter) {
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static gboolean
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gst_pipefilter_handle_eos (GstPad *pad)
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{
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GstPipefilter *pipefilter;
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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GST_DEBUG (0,"pipefilter: %s received eos\n", GST_ELEMENT_NAME (pipefilter));
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if (close (pipefilter->fdin[1]) < 0)
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perror("close");
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if (close (pipefilter->fdout[0]) < 0)
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perror("close");
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GST_FLAG_SET (pad, GST_PAD_EOS);
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return TRUE;
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}
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static GstBuffer*
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gst_pipefilter_get (GstPad *pad)
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{
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GstPipefilter *pipefilter;
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GstBuffer *newbuf;
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glong readbytes;
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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/* create the buffer */
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// FIXME: should eventually use a bufferpool for this
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newbuf = gst_buffer_new();
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g_return_val_if_fail(newbuf, FALSE);
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g_return_val_if_fail(newbuf, NULL);
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/* allocate the space for the buffer data */
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GST_BUFFER_DATA(newbuf) = g_malloc(pipefilter->bytes_per_read);
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g_return_val_if_fail(GST_BUFFER_DATA(newbuf) != NULL, FALSE);
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g_return_val_if_fail(GST_BUFFER_DATA(newbuf) != NULL, NULL);
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/* read it in from the file */
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GST_DEBUG (0,"attemting to read %ld bytes\n", pipefilter->bytes_per_read);
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readbytes = read(pipefilter->fdout[0], GST_BUFFER_DATA(newbuf), pipefilter->bytes_per_read);
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GST_DEBUG (0,"read %ld bytes\n", readbytes);
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if (readbytes < 0) {
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if (errno == EAGAIN) {
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GST_DEBUG (0,"no input yet\n");
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gst_buffer_unref(newbuf);
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return FALSE;
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}
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else {
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perror("read");
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gst_element_error(GST_ELEMENT(pipefilter),"reading");
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return FALSE;
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}
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}
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if (readbytes == 0) {
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gst_buffer_unref(newbuf);
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return FALSE;
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return NULL;
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}
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/* if we didn't get as many bytes as we asked for, we're at EOF */
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if (readbytes < pipefilter->bytes_per_read)
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GST_BUFFER_FLAG_SET(newbuf,GST_BUFFER_EOS);
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if (readbytes == 0) {
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gst_pad_set_eos (pad);
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return NULL;
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}
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GST_BUFFER_OFFSET(newbuf) = pipefilter->curoffset;
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GST_BUFFER_SIZE(newbuf) = readbytes;
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pipefilter->curoffset += readbytes;
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/* we're done, push the buffer off now */
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gst_pad_push(pipefilter->srcpad,newbuf);
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return TRUE;
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return newbuf;
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}
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void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf) {
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static void
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gst_pipefilter_chain (GstPad *pad,GstBuffer *buf)
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{
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GstPipefilter *pipefilter;
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glong writebytes;
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guchar *data;
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@ -174,8 +204,6 @@ void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf) {
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pipefilter = GST_PIPEFILTER (gst_pad_get_parent (pad));
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while (gst_pipefilter_read_and_push(pipefilter));
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data = GST_BUFFER_DATA(buf);
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size = GST_BUFFER_SIZE(buf);
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||||
|
|
@ -188,11 +216,11 @@ void gst_pipefilter_chain(GstPad *pad,GstBuffer *buf) {
|
|||
return;
|
||||
}
|
||||
gst_buffer_unref(buf);
|
||||
|
||||
while (gst_pipefilter_read_and_push(pipefilter));
|
||||
}
|
||||
|
||||
static void gst_pipefilter_set_arg(GtkObject *object,GtkArg *arg,guint id) {
|
||||
static void
|
||||
gst_pipefilter_set_arg (GtkObject *object,GtkArg *arg,guint id)
|
||||
{
|
||||
GstPipefilter *pipefilter;
|
||||
|
||||
/* it's not null if we got it, but it might not be ours */
|
||||
|
|
@ -209,7 +237,9 @@ static void gst_pipefilter_set_arg(GtkObject *object,GtkArg *arg,guint id) {
|
|||
}
|
||||
}
|
||||
|
||||
static void gst_pipefilter_get_arg(GtkObject *object,GtkArg *arg,guint id) {
|
||||
static void
|
||||
gst_pipefilter_get_arg (GtkObject *object,GtkArg *arg,guint id)
|
||||
{
|
||||
GstPipefilter *pipefilter;
|
||||
|
||||
/* it's not null if we got it, but it might not be ours */
|
||||
|
|
@ -227,18 +257,14 @@ static void gst_pipefilter_get_arg(GtkObject *object,GtkArg *arg,guint id) {
|
|||
}
|
||||
|
||||
/* open the file, necessary to go to RUNNING state */
|
||||
static gboolean gst_pipefilter_open_file(GstPipefilter *src) {
|
||||
static gboolean
|
||||
gst_pipefilter_open_file (GstPipefilter *src)
|
||||
{
|
||||
g_return_val_if_fail(!GST_FLAG_IS_SET(src,GST_PIPEFILTER_OPEN), FALSE);
|
||||
|
||||
pipe(src->fdin);
|
||||
pipe(src->fdout);
|
||||
|
||||
if (fcntl(src->fdout[0], F_SETFL, O_NONBLOCK) < 0) {
|
||||
perror("fcntl");
|
||||
gst_element_error(GST_ELEMENT(src),"fcntl");
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
if((src->childpid = fork()) == -1)
|
||||
{
|
||||
perror("fork");
|
||||
|
|
@ -248,6 +274,8 @@ static gboolean gst_pipefilter_open_file(GstPipefilter *src) {
|
|||
|
||||
if(src->childpid == 0)
|
||||
{
|
||||
close(src->fdin[1]);
|
||||
close(src->fdout[0]);
|
||||
// child
|
||||
dup2(src->fdin[0], STDIN_FILENO); /* set the childs input stream */
|
||||
dup2(src->fdout[1], STDOUT_FILENO); /* set the childs output stream */
|
||||
|
|
@ -258,13 +286,19 @@ static gboolean gst_pipefilter_open_file(GstPipefilter *src) {
|
|||
return FALSE;
|
||||
|
||||
}
|
||||
else {
|
||||
close(src->fdin[0]);
|
||||
close(src->fdout[1]);
|
||||
}
|
||||
|
||||
GST_FLAG_SET(src,GST_PIPEFILTER_OPEN);
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* close the file */
|
||||
static void gst_pipefilter_close_file(GstPipefilter *src) {
|
||||
static void
|
||||
gst_pipefilter_close_file (GstPipefilter *src)
|
||||
{
|
||||
g_return_if_fail(GST_FLAG_IS_SET(src,GST_PIPEFILTER_OPEN));
|
||||
|
||||
/* close the file */
|
||||
|
|
@ -280,7 +314,9 @@ static void gst_pipefilter_close_file(GstPipefilter *src) {
|
|||
GST_FLAG_UNSET(src,GST_PIPEFILTER_OPEN);
|
||||
}
|
||||
|
||||
static GstElementStateReturn gst_pipefilter_change_state(GstElement *element) {
|
||||
static GstElementStateReturn
|
||||
gst_pipefilter_change_state (GstElement *element)
|
||||
{
|
||||
g_return_val_if_fail(GST_IS_PIPEFILTER(element), FALSE);
|
||||
|
||||
/* if going down into NULL state, close the file if it's open */
|
||||
|
|
|
|||
Loading…
Reference in a new issue