merge file and alsa encoders into dabplus-enc

There was a lot of redundant code between the two

1 files changed, 108 insertions, 0 deletions

diff --git a/src/FileInput.cpp b/src/FileInput.cpp
new file mode 100644
index 0000000..c8023dd
--- /dev/null
+++ b/src/FileInput.cpp
@@ -0,0 +1,108 @@
+/* ------------------------------------------------------------------
+ * Copyright (C) 2014 Matthias P. Braendli
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+
+#include "FileInput.h"
+#include "wavreader.h"
+#include <cstring>
+#include <cstdio>
+
+#include <stdint.h>
+
+int FileInput::prepare(void)
+{
+    if (m_raw_input) {
+        if (m_filename && strcmp(m_filename, "-")) {
+            m_in_fh = fopen(m_filename, "rb");
+            if (!m_in_fh) {
+                fprintf(stderr, "Can't open input file!\n");
+                return 1;
+            }
+        }
+        else {
+            m_in_fh = stdin;
+        }
+    }
+    else {
+        int bits_per_sample = 0;
+        int channels = 0;
+        int wav_format = 0;
+        int sample_rate = 0;
+
+        m_wav = wav_read_open(m_filename);
+        if (!m_wav) {
+            fprintf(stderr, "Unable to open wav file %s\n", m_filename);
+            return 1;
+        }
+        if (!wav_get_header(m_wav, &wav_format, &channels, &sample_rate,
+                    &bits_per_sample, NULL)) {
+            fprintf(stderr, "Bad wav file %s\n", m_filename);
+            return 1;
+        }
+        if (wav_format != 1) {
+            fprintf(stderr, "Unsupported WAV format %d\n", wav_format);
+            return 1;
+        }
+        if (bits_per_sample != 16) {
+            fprintf(stderr, "Unsupported WAV sample depth %d\n", bits_per_sample);
+            return 1;
+        }
+        if (channels != 2) {
+            fprintf(stderr, "Unsupported WAV channels %d\n", channels);
+            return 1;
+        }
+        if (m_sample_rate != sample_rate) {
+            fprintf(stderr,
+                    "WAV sample rate %d doesn't correspond to desired sample rate %d\n",
+                    sample_rate, m_sample_rate);
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+ssize_t FileInput::read(uint8_t* buf, size_t length)
+{
+    ssize_t pcmread;
+
+    if (m_raw_input) {
+        if (fread(buf, length, 1, m_in_fh) == 1) {
+            pcmread = length;
+        }
+        else {
+            fprintf(stderr, "Unable to read from input!\n");
+            return 0;
+        }
+    }
+    else {
+        pcmread = wav_read_data(m_wav, buf, length);
+    }
+
+    return pcmread;
+}
+
+FileInput::~FileInput()
+{
+    if (m_raw_input && m_in_fh) {
+        fclose(m_in_fh);
+    }
+    else if (m_wav) {
+        wav_read_close(m_wav);
+    }
+}
+