Add sr_session_append(): add captured data to an existing session file

[libsigrok.git] / session_driver.c

diff --git a/session_driver.c b/session_driver.c
index 435d46af6dee27ed001f73d45910b458c49e145e..8090df9d84a427308bd3c7cc635899686c78862b 100644 (file)
--- a/session_driver.c
+++ b/session_driver.c
@@ -49,6 +49,7 @@ struct session_vdev {
        uint64_t samplerate;
        int unitsize;
        int num_probes;
+       int cur_chunk;
 };
 
 static GSList *dev_insts = NULL;
@@ -64,21 +65,20 @@ static int receive_data(int fd, int revents, void *cb_data)
        struct session_vdev *vdev;
        struct sr_datafeed_packet packet;
        struct sr_datafeed_logic logic;
+       struct zip_stat zs;
        GSList *l;
-       void *buf;
        int ret, got_data;
+       char capturefile[16];
+       void *buf;
 
        (void)fd;
        (void)revents;
 
-       sr_dbg("Feed chunk.");
-
        got_data = FALSE;
        for (l = dev_insts; l; l = l->next) {
                sdi = l->data;
-               vdev = sdi->priv;
-               if (!vdev)
-                       /* already done with this instance */
+               if (!(vdev = sdi->priv))
+                       /* Already done with this instance. */
                        continue;
 
                if (!(buf = g_try_malloc(CHUNKSIZE))) {
@@ -86,6 +86,53 @@ static int receive_data(int fd, int revents, void *cb_data)
                        return FALSE;
                }
 
+               if (!vdev->capfile) {
+                       /* No capture file opened yet, or finished with the last
+                        * chunked one. */
+                       if (vdev->cur_chunk == 0) {
+                               /* capturefile is always the unchunked base name. */
+                               if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) != -1) {
+                                       /* No chunks, just a single capture file. */
+                                       vdev->cur_chunk = 0;
+                                       if (!(vdev->capfile = zip_fopen(vdev->archive,
+                                                       vdev->capturefile, 0)))
+                                               return FALSE;
+                                               sr_dbg("Opened %s.", vdev->capturefile);
+                               } else {
+                                       /* Try as first chunk filename. */
+                                       snprintf(capturefile, 15, "%s-1", vdev->capturefile);
+                                       if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
+                                               vdev->cur_chunk = 1;
+                                               if (!(vdev->capfile = zip_fopen(vdev->archive,
+                                                               capturefile, 0)))
+                                                       return FALSE;
+                                               sr_dbg("Opened %s.", capturefile);
+                                       } else {
+                                               sr_err("No capture file '%s' in " "session file '%s'.",
+                                                               vdev->capturefile, vdev->sessionfile);
+                                               return FALSE;
+                                       }
+                               }
+                       } else {
+                               /* Capture data is chunked, advance to the next chunk. */
+                               vdev->cur_chunk++;
+                               snprintf(capturefile, 15, "%s-%d", vdev->capturefile,
+                                               vdev->cur_chunk);
+                               if (zip_stat(vdev->archive, capturefile, 0, &zs) != -1) {
+                                       if (!(vdev->capfile = zip_fopen(vdev->archive,
+                                                       capturefile, 0)))
+                                               return FALSE;
+                                       sr_dbg("Opened %s.", capturefile);
+                               } else {
+                                       /* We got all the chunks, finish up. */
+                                       g_free(vdev->capturefile);
+                                       g_free(vdev);
+                                       sdi->priv = NULL;
+                                       continue;
+                               }
+                       }
+               }
+
                ret = zip_fread(vdev->capfile, buf, CHUNKSIZE);
                if (ret > 0) {
                        got_data = TRUE;
@@ -99,9 +146,17 @@ static int receive_data(int fd, int revents, void *cb_data)
                } else {
                        /* done with this capture file */
                        zip_fclose(vdev->capfile);
-                       g_free(vdev->capturefile);
-                       g_free(vdev);
-                       sdi->priv = NULL;
+                       vdev->capfile = NULL;
+                       if (vdev->cur_chunk == 0) {
+                               /* It was the only file. */
+                               g_free(vdev->capturefile);
+                               g_free(vdev);
+                               sdi->priv = NULL;
+                       } else {
+                               /* There might be more chunks, so don't fall through
+                                * to the SR_DF_END here. */
+                               return TRUE;
+                       }
                }
        }
 
@@ -115,7 +170,6 @@ static int receive_data(int fd, int revents, void *cb_data)
 }
 
 /* driver callbacks */
-static int cleanup(void);
 
 static int init(struct sr_context *sr_ctx)
 {
@@ -218,7 +272,6 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 
 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 {
-       struct zip_stat zs;
        struct session_vdev *vdev;
        int ret;
 
@@ -233,18 +286,6 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
                return SR_ERR;
        }
 
-       if (zip_stat(vdev->archive, vdev->capturefile, 0, &zs) == -1) {
-               sr_err("Failed to check capture file '%s' in "
-                      "session file '%s'.", vdev->capturefile, vdev->sessionfile);
-               return SR_ERR;
-       }
-
-       if (!(vdev->capfile = zip_fopen(vdev->archive, vdev->capturefile, 0))) {
-               sr_err("Failed to open capture file '%s' in "
-                      "session file '%s'.", vdev->capturefile, vdev->sessionfile);
-               return SR_ERR;
-       }
-
        /* Send header packet to the session bus. */
        std_session_send_df_header(cb_data, LOG_PREFIX);