From 54831e4cd6a00d4d903b9254862881a92285ced5 Mon Sep 17 00:00:00 2001
From: Alexey Yakovenko <wakeroid@gmail.com>
Date: Sat, 26 Dec 2009 14:03:44 +0100
Subject: sndfile plugin: now uses deadbeef vfs to read files; added bitrate
 display

---
 plugins/sndfile/sndfile.c | 87 +++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 81 insertions(+), 6 deletions(-)

(limited to 'plugins/sndfile')

diff --git a/plugins/sndfile/sndfile.c b/plugins/sndfile/sndfile.c
index 46e3a99f..dfb956de 100644
--- a/plugins/sndfile/sndfile.c
+++ b/plugins/sndfile/sndfile.c
@@ -23,26 +23,75 @@
 #define min(x,y) ((x)<(y)?(x):(y))
 #define max(x,y) ((x)>(y)?(x):(y))
 
-#define trace(...) { fprintf(stderr, __VA_ARGS__); }
-//#define trace(fmt,...)
+//#define trace(...) { fprintf(stderr, __VA_ARGS__); }
+#define trace(fmt,...)
 
 static DB_decoder_t plugin;
 static DB_functions_t *deadbeef;
 
 typedef struct {
     SNDFILE *ctx;
+    DB_FILE *file;
     int startsample;
     int endsample;
     int currentsample;
+    int bitrate;
 } sndfilectx_t;
 
 static sndfilectx_t sfctx;
 
+
+// vfs wrapper for sf
+static sf_count_t
+sf_vfs_get_filelen (void *user_data) {
+    sndfilectx_t *ctx = user_data;
+    return deadbeef->fgetlength (ctx->file);
+}
+
+static sf_count_t
+sf_vfs_read (void *ptr, sf_count_t count, void *user_data) {
+    sndfilectx_t *ctx = user_data;
+    return deadbeef->fread (ptr, 1, count, ctx->file);
+}
+
+static sf_count_t
+sf_vfs_write (const void *ptr, sf_count_t count, void *user_data) {
+    return -1;
+}
+
+static sf_count_t
+sf_vfs_seek (sf_count_t offset, int whence, void *user_data) {
+    sndfilectx_t *ctx = user_data;
+    return deadbeef->fseek (ctx->file, offset, whence);
+}
+
+static sf_count_t
+sf_vfs_tell (void *user_data) {
+    sndfilectx_t *ctx = user_data;
+    return deadbeef->ftell (ctx->file);
+}
+
+static SF_VIRTUAL_IO vfs = {
+    .get_filelen = sf_vfs_get_filelen,
+    .seek = sf_vfs_seek,
+    .read = sf_vfs_read,
+    .write = sf_vfs_write,
+    .tell = sf_vfs_tell
+};
+
 static int
 sndfile_init (DB_playItem_t *it) {
     memset (&sfctx, 0, sizeof (sfctx));
     SF_INFO inf;
-    sfctx.ctx = sf_open (it->fname, SFM_READ, &inf);
+    DB_FILE *fp = deadbeef->fopen (it->fname);
+    if (!fp) {
+        trace ("sndfile: failed to open %s\n", it->fname);
+        return -1;
+    }
+    int fsize = deadbeef->fgetlength (fp);
+
+    sfctx.file = fp;
+    sfctx.ctx = sf_open_virtual (&vfs, SFM_READ, &inf, &sfctx);
     if (!sfctx.ctx) {
         return -1;
     }
@@ -62,6 +111,15 @@ sndfile_init (DB_playItem_t *it) {
         sfctx.startsample = 0;
         sfctx.endsample = inf.frames-1;
     }
+    // hack bitrate
+    float sec = (float)(sfctx.endsample-sfctx.startsample) / inf.samplerate;
+    if (sec != 0) {
+        sfctx.bitrate = fsize / sec * 8 / 1000;
+    }
+    else {
+        sfctx.bitrate = -1;
+    }
+
     return 0;
 }
 
@@ -70,6 +128,9 @@ sndfile_free (void) {
     if (sfctx.ctx) {
         sf_close (sfctx.ctx);
     }
+    if (sfctx.file) {
+        deadbeef->fclose (sfctx.file);
+    }
     memset (&sfctx, 0, sizeof (sfctx));
 }
 
@@ -86,6 +147,9 @@ sndfile_read_int16 (char *bytes, int size) {
     sfctx.currentsample += n;
     size = n * 2 * plugin.info.channels;
     plugin.info.readpos = (float)(sfctx.currentsample-sfctx.startsample)/plugin.info.samplerate;
+    if (sfctx.bitrate > 0) {
+        deadbeef->streamer_set_bitrate (sfctx.bitrate);
+    }
     return size;
 }
 
@@ -102,6 +166,9 @@ sndfile_read_float32 (char *bytes, int size) {
     sfctx.currentsample += n;
     size = n * 4 * plugin.info.channels;
     plugin.info.readpos = (float)(sfctx.currentsample-sfctx.startsample)/plugin.info.samplerate;
+    if (sfctx.bitrate > 0) {
+        deadbeef->streamer_set_bitrate (sfctx.bitrate);
+    }
     return size;
 }
 
@@ -120,14 +187,22 @@ sndfile_seek (float sec) {
 static DB_playItem_t *
 sndfile_insert (DB_playItem_t *after, const char *fname) {
     SF_INFO inf;
-    SNDFILE *sf = sf_open (fname, SFM_READ, &inf);
-    if (!sf) {
+    sndfilectx_t sfctx;
+    sfctx.file = deadbeef->fopen (fname);
+    if (!sfctx.file) {
+        trace ("sndfile: failed to open %s\n", fname);
+        return NULL;
+    }
+    sfctx.ctx = sf_open_virtual (&vfs, SFM_READ, &inf, &sfctx);
+    if (!sfctx.ctx) {
         trace ("sndfile: sf_open failed");
         return NULL;
     }
     int totalsamples = inf.frames;
     int samplerate = inf.samplerate;
-    sf_close (sf);
+    sf_close (sfctx.ctx);
+    deadbeef->fclose (sfctx.file);
+
     float duration = (float)totalsamples / samplerate;
     DB_playItem_t *cue_after = deadbeef->pl_insert_cue (after, fname, &plugin, "sndfile", totalsamples, samplerate);
     if (cue_after) {
-- 
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