Add tinyplay utility to play PCM riff/wave files

2 files changed, 150 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 589ff4c..aa1310b 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,9 @@ INC = include
 OBJECTS = mixer.o pcm.o
 LIB = libtinyalsa.so
 
+tinyplay: $(LIB) tinyplay.o
+	gcc tinyplay.o -L. -ltinyalsa -o tinyplay
+
 libtinyalsa.so: $(OBJECTS)
 	gcc -shared $(OBJECTS) -o $(LIB)
 
@@ -10,4 +13,4 @@ libtinyalsa.so: $(OBJECTS)
 	gcc $(CFLAGS) $< -I$(INC)
 	
 clean:
-	rm $(LIB) $(OBJECTS)
+	rm $(LIB) $(OBJECTS) tinyplay.o tinyplay
diff --git a/tinyplay.c b/tinyplay.c
new file mode 100644
index 0000000..63ced5b
--- /dev/null
+++ b/tinyplay.c
@@ -0,0 +1,146 @@
+/* tinyplay.c
+**
+** Copyright 2011, 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 <tinyalsa/asoundlib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#define ID_RIFF 0x46464952
+#define ID_WAVE 0x45564157
+#define ID_FMT  0x20746d66
+#define ID_DATA 0x61746164
+
+#define FORMAT_PCM 1
+
+struct wav_header {
+    uint32_t riff_id;
+    uint32_t riff_sz;
+    uint32_t riff_fmt;
+    uint32_t fmt_id;
+    uint32_t fmt_sz;
+    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;
+    uint32_t data_id;
+    uint32_t data_sz;
+};
+
+void play_sample(FILE *file, unsigned int channels, unsigned int rate,
+                 unsigned int bits);
+
+int main(int argc, char **argv)
+{
+    FILE *file;
+    struct wav_header header;
+
+    file = fopen(argv[1], "rb");
+    if (!file) {
+        fprintf(stderr, "Unable to open file '%s'\n", argv[1]);
+        return 1;
+    }
+
+    fread(&header, sizeof(struct wav_header), 1, file);
+
+    if ((header.riff_id != ID_RIFF) ||
+        (header.riff_fmt != ID_WAVE) ||
+        (header.fmt_id != ID_FMT) ||
+        (header.audio_format != FORMAT_PCM) ||
+        (header.fmt_sz != 16)) {
+        fprintf(stderr, "Error: '%s' is not a PCM riff/wave file\n", argv[1]);
+        fclose(file);
+        return 1;
+    }
+
+    play_sample(file, header.num_channels, header.sample_rate,
+                header.bits_per_sample);
+
+    fclose(file);
+
+    return 0;
+}
+
+void play_sample(FILE *file, unsigned int channels, unsigned int rate,
+                 unsigned int bits)
+{
+    struct pcm_config config;
+    struct pcm *pcm;
+    char *buffer;
+    int size;
+    int num_read;
+
+    config.channels = channels;
+    config.rate = rate;
+    config.period_size = 1024;
+    config.period_count = 4;
+    if (bits == 32)
+        config.format = PCM_FORMAT_S32_LE;
+    else if (bits == 16)
+        config.format = PCM_FORMAT_S16_LE;
+
+    pcm = pcm_open(0, 0, PCM_OUT, &config);
+    if (!pcm || !pcm_is_ready(pcm)) {
+        fprintf(stderr, "%s\n", pcm_get_error(pcm));
+        return;
+    }
+
+    size = pcm_get_buffer_size(pcm);
+    buffer = malloc(size);
+    if (!buffer) {
+        fprintf(stderr, "Unable to allocate %d bytes\n", size);
+        free(buffer);
+        pcm_close(pcm);
+        return;
+    }
+
+    printf("Playing sample: %u ch, %u hz, %u bit\n", channels, rate, bits);
+
+    while (fread(buffer, 1, size, file) == size) {
+        if (pcm_write(pcm, buffer, size)) {
+            fprintf(stderr, "Error playing sample\n");
+            break;
+        }
+    }
+
+    do {
+        num_read = fread(buffer, 1, size, file);
+        if (num_read > 0) {
+            if (pcm_write(pcm, buffer, num_read)) {
+                fprintf(stderr, "Error playing sample\n");
+                break;
+            }
+        }
+    } while (num_read > 0);
+
+    free(buffer);
+    pcm_close(pcm);
+}
+