mirror of https://github.com/mpv-player/mpv
115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
/*
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* NuppelVideo 0.05 file parser
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* for MPlayer
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* by Panagiotis Issaris <takis@lumumba.luc.ac.be>
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*
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* Reworked by alex
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "mpbswap.h"
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#include "libvo/fastmemcpy.h"
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#include "libmpdemux/nuppelvideo.h"
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#include "rtjpegn.h"
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#include "libavutil/lzo.h"
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#define KEEP_BUFFER
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void decode_nuv( unsigned char *encoded, int encoded_size,
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unsigned char *decoded, int width, int height)
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{
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int r;
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unsigned int out_len = width * height + ( width * height ) / 2;
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struct rtframeheader *encodedh = ( struct rtframeheader* ) encoded;
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static unsigned char *buffer = 0; /* for RTJpeg with LZO decompress */
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#ifdef KEEP_BUFFER
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static unsigned char *previous_buffer = 0; /* to support Last-frame-copy */
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#endif
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// printf("frametype: %c, comtype: %c, encoded_size: %d, width: %d, height: %d\n",
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// encodedh->frametype, encodedh->comptype, encoded_size, width, height);
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le2me_rtframeheader(encodedh);
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switch(encodedh->frametype)
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{
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case 'D': /* additional data for compressors */
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{
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/* tables are in encoded */
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if (encodedh->comptype == 'R')
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{
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RTjpeg_init_decompress ( (unsigned long *)(encoded+12), width, height );
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mp_msg(MSGT_DECVIDEO, MSGL_V, "Found RTjpeg tables (size: %d, width: %d, height: %d)\n",
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encoded_size-12, width, height);
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}
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break;
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}
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case 'V':
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{
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int in_len = encodedh->packetlength;
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#ifdef KEEP_BUFFER
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if (!previous_buffer)
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previous_buffer = ( unsigned char * ) malloc ( out_len + LZO_OUTPUT_PADDING );
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#endif
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switch(encodedh->comptype)
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{
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case '0': /* raw YUV420 */
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fast_memcpy(decoded, encoded + 12, out_len);
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break;
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case '1': /* RTJpeg */
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RTjpeg_decompressYUV420 ( ( __s8 * ) encoded + 12, decoded );
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break;
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case '2': /* RTJpeg with LZO */
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if (!buffer)
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buffer = ( unsigned char * ) malloc ( out_len + LZO_OUTPUT_PADDING );
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if (!buffer)
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{
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Nuppelvideo: error decompressing\n");
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break;
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}
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r = lzo1x_decode ( buffer, &out_len, encoded + 12, &in_len );
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if ( r )
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{
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Nuppelvideo: error decompressing\n");
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break;
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}
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RTjpeg_decompressYUV420 ( ( __s8 * ) buffer, decoded );
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break;
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case '3': /* raw YUV420 with LZO */
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r = lzo1x_decode ( decoded, &out_len, encoded + 12, &in_len );
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if ( r )
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{
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, "Nuppelvideo: error decompressing\n");
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break;
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}
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break;
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case 'N': /* black frame */
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memset ( decoded, 0, width * height );
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memset ( decoded + width * height, 127, width * height / 2);
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break;
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case 'L': /* copy last frame */
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#ifdef KEEP_BUFFER
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fast_memcpy ( decoded, previous_buffer, width*height*3/2);
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#endif
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break;
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}
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#ifdef KEEP_BUFFER
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fast_memcpy(previous_buffer, decoded, width*height*3/2);
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#endif
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break;
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}
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default:
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mp_msg(MSGT_DECVIDEO, MSGL_V, "Nuppelvideo: unknwon frametype: %c\n",
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encodedh->frametype);
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}
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}
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