Initial community commit

Src/jpeg/mp4_jpeg_decoder.cpp

@@ -0,0 +1,91 @@
+#include "mp4_jpeg_decoder.h"
+#include "api__jpeg.h"
+#include <api/service/waservicefactory.h>
+
+MP4JPEGDecoder::MP4JPEGDecoder()
+{
+	jpegLoader=0;
+	width=0;
+	height=0;
+	decoded_image = 0;
+}
+
+int MP4JPEGDecoder::Open(MP4FileHandle mp4_file, MP4TrackId mp4_track)
+{
+	// load JPEG loader
+	jpegLoader = new JpgLoad;
+
+	if (jpegLoader)
+		return MP4_VIDEO_SUCCESS;
+	else
+		return MP4_VIDEO_FAILURE;
+
+}
+
+void MP4JPEGDecoder::Close()
+{
+	delete jpegLoader;
+	delete this;
+}
+
+int MP4JPEGDecoder::GetOutputFormat(int *x, int *y, int *color_format, double *aspect_ratio)
+{
+	if (!height || !width)
+		return MP4_VIDEO_FAILURE;
+
+	*x = width;
+	*y = height;
+	*color_format = '23GR'; // RGB32
+	return MP4_VIDEO_SUCCESS;
+}
+
+int MP4JPEGDecoder::DecodeSample(const void *inputBuffer, size_t inputBufferBytes, MP4Timestamp timestamp)
+{
+	bool change_in_size=false;
+	if (decoded_image)
+		WASABI_API_MEMMGR->sysFree(decoded_image);
+	int decode_width, decode_height;
+	decoded_image = jpegLoader->loadImage(inputBuffer, (int)inputBufferBytes, &decode_width, &decode_height);
+	if (!decoded_image)
+		return MP4_VIDEO_FAILURE;
+	if (width && decode_width != width // if we have a different width from last time
+		|| height && decode_height != height) 
+		change_in_size = true; 
+
+	width = decode_width;
+	height = decode_height;
+	return change_in_size?MP4_VIDEO_OUTPUT_FORMAT_CHANGED:MP4_VIDEO_SUCCESS;
+}
+
+int MP4JPEGDecoder::CanHandleCodec(const char *codecName)
+{
+	return !strcmp(codecName, "jpeg");
+}
+
+int MP4JPEGDecoder::GetPicture(void **data, void **decoder_data, MP4Timestamp *timestamp)
+{
+	if (!decoded_image)
+		return MP4_VIDEO_FAILURE;
+
+	*data = decoded_image;
+	*decoder_data = 0;
+	decoded_image = 0; // wipe our hands clean of it so we don't double free
+	return MP4_VIDEO_SUCCESS;
+}
+
+void MP4JPEGDecoder::FreePicture(void *data, void *decoder_data)
+{
+	WASABI_API_MEMMGR->sysFree(data);
+}
+
+#define CBCLASS MP4JPEGDecoder
+START_DISPATCH;
+CB(MPEG4_VIDEO_OPEN, Open)
+CB(MPEG4_VIDEO_GETOUTPUTFORMAT, GetOutputFormat)
+CB(MPEG4_VIDEO_DECODE, DecodeSample)
+CB(MPEG4_VIDEO_HANDLES_CODEC, CanHandleCodec)
+CB(MPEG4_VIDEO_GET_PICTURE, GetPicture)
+VCB(MPEG4_VIDEO_FREE_PICTURE, FreePicture)
+END_DISPATCH;
+#undef CBCLASS
+