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