really create glitch-free branch

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2120 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 211 insertions, 0 deletions

diff --git a/src/pulsecore/sound-file.c b/src/pulsecore/sound-file.c
new file mode 100644
index 00000000..3e6f683d
--- /dev/null
+++ b/src/pulsecore/sound-file.c
@@ -0,0 +1,211 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2004-2006 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <sndfile.h>
+
+#include <pulse/sample.h>
+#include <pulsecore/log.h>
+#include <pulsecore/macro.h>
+#include <pulsecore/core-error.h>
+#include <pulsecore/core-util.h>
+
+#include "sound-file.h"
+#include "core-scache.h"
+
+int pa_sound_file_load(
+        pa_mempool *pool,
+        const char *fname,
+        pa_sample_spec *ss,
+        pa_channel_map *map,
+        pa_memchunk *chunk) {
+
+    SNDFILE *sf = NULL;
+    SF_INFO sfinfo;
+    int ret = -1;
+    size_t l;
+    sf_count_t (*readf_function)(SNDFILE *sndfile, void *ptr, sf_count_t frames) = NULL;
+    void *ptr = NULL;
+    int fd;
+
+    pa_assert(fname);
+    pa_assert(ss);
+    pa_assert(chunk);
+
+    pa_memchunk_reset(chunk);
+    memset(&sfinfo, 0, sizeof(sfinfo));
+
+    if ((fd = open(fname, O_RDONLY
+#ifdef O_NOCTTY
+                   |O_NOCTTY
+#endif
+                   )) < 0) {
+        pa_log("Failed to open file %s: %s", fname, pa_cstrerror(errno));
+        goto finish;
+    }
+
+#ifdef HAVE_POSIX_FADVISE
+    if (posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL) < 0) {
+        pa_log_warn("POSIX_FADV_SEQUENTIAL failed: %s", pa_cstrerror(errno));
+        goto finish;
+    } else
+        pa_log_debug("POSIX_FADV_SEQUENTIAL succeeded.");
+#endif
+
+    if (!(sf = sf_open_fd(fd, SFM_READ, &sfinfo, 1))) {
+        pa_log("Failed to open file %s", fname);
+        pa_close(fd);
+        goto finish;
+    }
+
+    switch (sfinfo.format & SF_FORMAT_SUBMASK) {
+        case SF_FORMAT_PCM_16:
+        case SF_FORMAT_PCM_U8:
+        case SF_FORMAT_PCM_S8:
+            ss->format = PA_SAMPLE_S16NE;
+            readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_short;
+            break;
+
+        case SF_FORMAT_ULAW:
+            ss->format = PA_SAMPLE_ULAW;
+            break;
+
+        case SF_FORMAT_ALAW:
+            ss->format = PA_SAMPLE_ALAW;
+            break;
+
+        case SF_FORMAT_FLOAT:
+        case SF_FORMAT_DOUBLE:
+        default:
+            ss->format = PA_SAMPLE_FLOAT32NE;
+            readf_function = (sf_count_t (*)(SNDFILE *sndfile, void *ptr, sf_count_t frames)) sf_readf_float;
+            break;
+    }
+
+    ss->rate = sfinfo.samplerate;
+    ss->channels = sfinfo.channels;
+
+    if (!pa_sample_spec_valid(ss)) {
+        pa_log("Unsupported sample format in file %s", fname);
+        goto finish;
+    }
+
+    if (map)
+        if (!pa_channel_map_init_auto(map, ss->channels, PA_CHANNEL_MAP_DEFAULT)) {
+            pa_log("Unsupported channel map in file %s", fname);
+            goto finish;
+        }
+
+    if ((l = pa_frame_size(ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
+        pa_log("File too large");
+        goto finish;
+    }
+
+    chunk->memblock = pa_memblock_new(pool, l);
+    chunk->index = 0;
+    chunk->length = l;
+
+    ptr = pa_memblock_acquire(chunk->memblock);
+
+    if ((readf_function && readf_function(sf, ptr, sfinfo.frames) != sfinfo.frames) ||
+        (!readf_function && sf_read_raw(sf, ptr, l) != (sf_count_t) l)) {
+        pa_log("Premature file end");
+        goto finish;
+    }
+
+    ret = 0;
+
+finish:
+
+    if (sf)
+        sf_close(sf);
+
+    if (ptr)
+        pa_memblock_release(chunk->memblock);
+
+    if (ret != 0 && chunk->memblock)
+        pa_memblock_unref(chunk->memblock);
+
+    return ret;
+}
+
+int pa_sound_file_too_big_to_cache(const char *fname) {
+
+    SNDFILE*sf = NULL;
+    SF_INFO sfinfo;
+    pa_sample_spec ss;
+
+    pa_assert(fname);
+
+    if (!(sf = sf_open(fname, SFM_READ, &sfinfo))) {
+        pa_log("Failed to open file %s", fname);
+        return -1;
+    }
+
+    sf_close(sf);
+
+    switch (sfinfo.format & SF_FORMAT_SUBMASK) {
+        case SF_FORMAT_PCM_16:
+        case SF_FORMAT_PCM_U8:
+        case SF_FORMAT_PCM_S8:
+            ss.format = PA_SAMPLE_S16NE;
+            break;
+
+        case SF_FORMAT_ULAW:
+            ss.format = PA_SAMPLE_ULAW;
+            break;
+
+        case SF_FORMAT_ALAW:
+            ss.format = PA_SAMPLE_ALAW;
+            break;
+
+        case SF_FORMAT_DOUBLE:
+        case SF_FORMAT_FLOAT:
+        default:
+            ss.format = PA_SAMPLE_FLOAT32NE;
+            break;
+    }
+
+    ss.rate = sfinfo.samplerate;
+    ss.channels = sfinfo.channels;
+
+    if (!pa_sample_spec_valid(&ss)) {
+        pa_log("Unsupported sample format in file %s", fname);
+        return -1;
+    }
+
+    if ((pa_frame_size(&ss) * sfinfo.frames) > PA_SCACHE_ENTRY_SIZE_MAX) {
+        pa_log("File too large: %s", fname);
+        return 1;
+    }
+
+    return 0;
+}