Add addaudio.c to VideoSDcard example

examples/VideoSDcard/addaudio/addaudio.c

@@ -0,0 +1,141 @@
+/*  OctoWS2811 addaudio.c - Merge image and sound data to VIDEO.BIN
+      for Teensy 3.1 running OctoWS2811 VideoSDcard.ino
+
+    http://www.pjrc.com/teensy/td_libs_OctoWS2811.html
+    Copyright (c) 2014 Paul Stoffregen, PJRC.COM, LLC
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+*/
+
+// Basis Usage:
+//
+// First, run movie2sdcard.pde with Processing....
+//
+// Merge "myvideo.bin" image data, created by movie2sdcard.pde,
+// and "myvideo.raw" audio data, created by ffmpeg & sox,
+// to create "VIDEO.BIN" which can be played by VideoSDcard.ino
+//
+// Run with these commands:
+//
+// ./ffmpeg -i myvideo.mov -vn -f wav myvideo.wav
+// ./sox myvideo.wav -c 1 -b 16 -r 44117.647 myvideo.raw
+// ./addaudio
+//
+// Then copy VIDEO.BIN to a Micro SD card and play it on your LEDs :-)
+//
+// Compile with:
+//
+// gcc -O2 -Wall -o addaudio addaudio.c
+
+#define VIDEO_INFILE  "myvideo.bin"
+#define AUDIO_INFILE  "myvideo.raw"
+#define OUTFILE       "VIDEO.BIN"
+
+#define SAMPLE_RATE   44117.64706
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+void die(const char *format, ...) __attribute__ ((format (printf, 1, 2)));
+
+int main()
+{
+	FILE *fpa, *fpv, *fout;
+	unsigned char header[5], header2[5];
+	unsigned char vbuf[65536], abuf[65536];
+	unsigned int usec;
+	uint64_t elapsed_usec=0LL;
+	//double elapsed_usec=0.0;
+	unsigned int target_samples, elapsed_samples=0;
+	unsigned int samples;
+	size_t n, size;
+
+	fpv = fopen(VIDEO_INFILE, "rb");
+	if (!fpv) die("unable to read %s\n", VIDEO_INFILE);
+	fpa = fopen(AUDIO_INFILE, "rb");
+	if (!fpa) die("unable to read %s\n", AUDIO_INFILE);
+	fout = fopen(OUTFILE, "wb");
+	if (!fout) die("unable to write %s\n", OUTFILE);
+
+	while (!feof(fpv)) {
+		n = fread(header, 1, 5, fpv);
+		if (n != 5) {
+			if (feof(fpv)) break;
+			die("unable to read video header");
+		}
+		if (header[0] == '*') {
+			size = (header[1] | (header[2] << 8)) * 3;
+			usec = header[3] | (header[4] << 8);
+			if (size > sizeof(vbuf)) die("vbuf not big enough");
+			n = fread(vbuf, 1, size, fpv);
+			if (n != size) die("unable to read video data");
+
+			printf("v: %u %u", (int)size, usec);
+
+			if (usec == 0xFFFF) die("opps");
+
+			elapsed_usec += usec;
+			target_samples = ((uint64_t)elapsed_usec *
+				(uint64_t)(SAMPLE_RATE * 1000.0) / 1000000000LL);
+			//target_samples = elapsed_usec / 1e6 * SAMPLE_RATE;
+			target_samples += 2560; // try to always buffer 2.5K
+			samples = (target_samples - elapsed_samples + 127) / 128 * 128;
+			elapsed_samples += samples;
+			printf(", s=%u, n=%u", target_samples, samples);
+
+			n = fread(abuf, 1, samples*2, fpa);
+			if (n < samples*2) {
+				printf(", n(audio) = %d", (int)n);
+				n &= ~1;
+			}
+			header2[0] = '%';
+			header2[1] = samples & 255;
+			header2[2] = samples >> 8;
+			header2[3] = 0;
+			header2[4] = 0;
+			fwrite(header2, 1, 5, fout);
+			fwrite(abuf, 2, samples, fout);
+			fwrite(header, 1, 5, fout);
+			fwrite(vbuf, 1, size, fout);
+
+		} else if (header[0] == '%') {
+			// skip audio, if input file has any
+			size = (header[1] | (header[2] << 8)) * 3;
+			n = fread(vbuf, 1, size, fpv);
+			if (n != size) die("unable to read video data");
+		} else {
+			die("unknown header type");
+		}
+		printf("\n");
+	}
+	return 0;
+}
+
+void die(const char *format, ...)
+{
+        va_list args;
+        va_start(args, format);
+        fprintf(stderr, "addaudio: ");
+        vfprintf(stderr, format, args);
+        fprintf(stderr, "\n");
+        exit(1);
+}
+