hvirtual/quicktime/rtjpeg.c

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#include <stdio.h>
#include "rtjpeg.h"
#include "quicktime.h"


int quicktime_init_codec_rtjpeg(quicktime_video_map_t *vtrack, int jpeg_type)
{
        quicktime_rtjpeg_codec_t *codec = &(vtrack->codecs.rtjpeg_codec);

        codec->quality = 100;
        codec->output_buffer = 0;
        codec->buffer_size = codec->image_size = 0;
        RTjpeg_init_compress(&(codec->compress_struct), vtrack->track->tkhd.track_width, vtrack->track->tkhd.track_height, (int)((float)codec->quality / 100 * 255));
        RTjpeg_init_decompress(&(codec->decompress_struct), vtrack->track->tkhd.track_width, vtrack->track->tkhd.track_height);
        codec->yuv_frame = malloc(vtrack->track->tkhd.track_width * vtrack->track->tkhd.track_height * 3);
}

int quicktime_delete_codec_rtjpeg(quicktime_video_map_t *vtrack)
{
        quicktime_rtjpeg_codec_t *codec = &(vtrack->codecs.rtjpeg_codec);
        if(codec->output_buffer)
                free(codec->output_buffer);
        if(codec->yuv_frame)
                free(codec->yuv_frame);
        codec->output_buffer = 0;
        codec->yuv_frame = 0;
}

int quicktime_decode_rtjpeg(quicktime_t *file, unsigned char **row_pointers, int track)
{
        int result = 0;
        register int i;
        long size;
        quicktime_trak_t *trak = file->vtracks[track].track;
        quicktime_video_map_t *vtrack = &(file->vtracks[track]);
        quicktime_rtjpeg_codec_t *codec = &(vtrack->codecs.rtjpeg_codec);

/* Read the entire chunk from disk. */
        quicktime_set_video_position(file, vtrack->current_position, track);
        size = quicktime_frame_size(file, vtrack->current_position, track);
        if(size > codec->buffer_size && codec->output_buffer)
        {
                free(codec->output_buffer);
                codec->output_buffer = 0;
        }
        if(!codec->output_buffer)
        {
                codec->output_buffer = malloc(size);
                codec->buffer_size = size;
        }
        result = !quicktime_read_data(file, codec->output_buffer, size);

        if(!result)
        {
/* Decompress the frame */
                RTjpeg_init_Q(&(codec->decompress_struct), codec->output_buffer[0]);
                RTjpeg_decompressYUV420(&(codec->decompress_struct), &(codec->output_buffer[8]), codec->yuv_frame);
                RTjpeg_yuv420rgb(&(codec->decompress_struct), codec->yuv_frame, row_pointers[0], 0);
        }

        return result;
}


int quicktime_encode_jpeg(quicktime_t *file, unsigned char **row_pointers, int track)
{
        long offset = quicktime_position(file);
        int result = 0;
        register int i;
        quicktime_trak_t *trak = file->vtracks[track].track;
        quicktime_video_map_t *vtrack = &(file->vtracks[track]);
        quicktime_jpeg_codec_t *codec = &(vtrack->codecs.jpeg_codec);



        bytes = quicktime_position(file) - offset;
        quicktime_update_tables(file,
                                                vtrack->track,
                                                offset,
                                                vtrack->current_chunk,
                                                vtrack->current_position,
                                                1,
                                                bytes);

        vtrack->current_chunk++;
        return result;
}

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