Merge pull request #60 from JaydeepDhole/Added_tinywavinfo_utility

Added tinywavinfo utility

2 files changed, 232 insertions, 0 deletions

diff --git a/Android.mk b/Android.mk
index 3ebd972..0d58556 100644
--- a/Android.mk
+++ b/Android.mk
@@ -21,6 +21,24 @@ include $(BUILD_EXECUTABLE)
 
 include $(CLEAR_VARS)
 LOCAL_C_INCLUDES:= external/tinyalsa/include
+LOCAL_SRC_FILES:= tinywavinfo.c
+LOCAL_MODULE := tinywavinfo
+LOCAL_SHARED_LIBRARIES:= libcutils libutils libm
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_EXECUTABLE)
+
+ifeq ($(HOST_OS), linux)
+include $(CLEAR_VARS)
+LOCAL_C_INCLUDES:= external/tinyalsa/include
+LOCAL_SRC_FILES:= tinywavinfo.c
+LOCAL_MODULE := tinywavinfo
+LOCAL_STATIC_LIBRARIES:= libcutils libutils
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_HOST_EXECUTABLE)
+endif
+
+include $(CLEAR_VARS)
+LOCAL_C_INCLUDES:= external/tinyalsa/include
 LOCAL_SRC_FILES:= tinycap.c
 LOCAL_MODULE := tinycap
 LOCAL_SHARED_LIBRARIES:= libcutils libutils libtinyalsa
diff --git a/tinywavinfo.c b/tinywavinfo.c
new file mode 100644
index 0000000..9d15668
--- /dev/null
+++ b/tinywavinfo.c
@@ -0,0 +1,214 @@
+/* tinywavinfo.c
+**
+** Copyright 2015, The Android Open Source Project
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of The Android Open Source Project nor the names of
+**       its contributors may be used to endorse or promote products derived
+**       from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE
+** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
+** DAMAGE.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <signal.h>
+#include <math.h>
+#include <malloc.h>
+
+#define ID_RIFF 0x46464952
+#define ID_WAVE 0x45564157
+#define ID_FMT  0x20746d66
+#define ID_DATA 0x61746164
+
+struct riff_wave_header {
+    uint32_t riff_id;
+    uint32_t riff_sz;
+    uint32_t wave_id;
+};
+
+struct chunk_header {
+    uint32_t id;
+    uint32_t sz;
+};
+
+struct chunk_fmt {
+    uint16_t audio_format;
+    uint16_t num_channels;
+    uint32_t sample_rate;
+    uint32_t byte_rate;
+    uint16_t block_align;
+    uint16_t bits_per_sample;
+};
+
+static int close = 0;
+
+void analyse_sample(FILE *file, unsigned int channels, unsigned int bits,
+                    unsigned int data_chunk_size);
+
+void stream_close(int sig)
+{
+    /* allow the stream to be closed gracefully */
+    signal(sig, SIG_IGN);
+    close = 1;
+}
+
+int main(int argc, char **argv)
+{
+    FILE *file;
+    struct riff_wave_header riff_wave_header;
+    struct chunk_header chunk_header;
+    struct chunk_fmt chunk_fmt;
+    char *filename;
+    int more_chunks = 1;
+
+    if (argc < 2) {
+        fprintf(stderr, "Usage: %s file.wav \n", argv[0]);
+        return 1;
+    }
+
+    filename = argv[1];
+    file = fopen(filename, "rb");
+    if (!file) {
+        fprintf(stderr, "Unable to open file '%s'\n", filename);
+        return 1;
+    }
+
+    fread(&riff_wave_header, sizeof(riff_wave_header), 1, file);
+    if ((riff_wave_header.riff_id != ID_RIFF) ||
+        (riff_wave_header.wave_id != ID_WAVE)) {
+        fprintf(stderr, "Error: '%s' is not a riff/wave file\n", filename);
+        fclose(file);
+        return 1;
+    }
+
+    do {
+        fread(&chunk_header, sizeof(chunk_header), 1, file);
+
+        switch (chunk_header.id) {
+        case ID_FMT:
+            fread(&chunk_fmt, sizeof(chunk_fmt), 1, file);
+            /* If the format header is larger, skip the rest */
+            if (chunk_header.sz > sizeof(chunk_fmt))
+                fseek(file, chunk_header.sz - sizeof(chunk_fmt), SEEK_CUR);
+            break;
+        case ID_DATA:
+            /* Stop looking for chunks */
+            more_chunks = 0;
+            break;
+        default:
+            /* Unknown chunk, skip bytes */
+            fseek(file, chunk_header.sz, SEEK_CUR);
+        }
+    } while (more_chunks);
+
+    printf("Input File       : %s \n", filename);
+    printf("Channels         : %u \n", chunk_fmt.num_channels);
+    printf("Sample Rate      : %u \n", chunk_fmt.sample_rate);
+    printf("Bits per sample  : %u \n\n", chunk_fmt.bits_per_sample);
+
+    analyse_sample(file, chunk_fmt.num_channels, chunk_fmt.bits_per_sample,
+                    chunk_header.sz);
+
+    fclose(file);
+
+    return 0;
+}
+
+void analyse_sample(FILE *file, unsigned int channels, unsigned int bits,
+                    unsigned int data_chunk_size)
+{
+    void *buffer;
+    int size;
+    int num_read;
+    int i;
+    unsigned int ch;
+    int frame_size = 1024;
+    unsigned int byte_align = 0;
+    float *power;
+    int total_sample_per_channel;
+    float normalization_factor;
+
+    if (bits == 32)
+        byte_align = 4;
+    else if (bits == 16)
+        byte_align = 2;
+
+    normalization_factor = (float)pow(2.0, (bits-1));
+
+    size = channels * byte_align * frame_size;
+    buffer = memalign(byte_align, size);
+
+    if (!buffer) {
+        fprintf(stderr, "Unable to allocate %d bytes\n", size);
+        free(buffer);
+        return;
+    }
+
+    power = (float *) calloc(channels, sizeof(float));
+
+    total_sample_per_channel = data_chunk_size / (channels * byte_align);
+
+    /* catch ctrl-c to shutdown cleanly */
+    signal(SIGINT, stream_close);
+
+    do {
+        num_read = fread(buffer, 1, size, file);
+        if (num_read > 0) {
+            if (2 == byte_align) {
+                short *buffer_ptr = (short *)buffer;
+                for (i = 0; i < num_read; i += channels) {
+                    for (ch = 0; ch < channels; ch++) {
+                        int temp = *buffer_ptr++;
+                        /* Signal Normalization */
+                        float f = (float) temp / normalization_factor;
+                        *(power + ch) += (float) (f * f);
+                    }
+                }
+            }
+            if (4 == byte_align) {
+                int *buffer_ptr = (int *)buffer;
+                for (i = 0; i < num_read; i += channels) {
+                    for (ch = 0; ch < channels; ch++) {
+                        int temp = *buffer_ptr++;
+                        /* Signal Normalization */
+                        float f = (float) temp / normalization_factor;
+                        *(power + ch) += (float) (f * f);
+                    }
+                }
+            }
+        }
+    }while (!close && num_read > 0);
+
+    for (ch = 0; ch < channels; ch++) {
+        float average_power = 10 * log10((*(power + ch)) / total_sample_per_channel);
+        if(isinf (average_power)) {
+            printf("Channel [%2d] Average Power : NO signal or ZERO signal\n", ch);
+        } else {
+            printf("Channel [%2d] Average Power : %.2f dB\n", ch, average_power);
+        }
+    }
+
+    free(buffer);
+    free(power);
+
+}
+