mirror of
https://github.com/mpv-player/mpv
synced 2025-03-18 17:40:30 +00:00
oh yeah, this is it...MPlayer now has 4-bit MS RLE support...I think
MPlayer is basically complete now...:) git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5214 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
melanson
parent
0016fc77d1
commit
c09119195d
@ -24,7 +24,16 @@ static int control(sh_video_t *sh,int cmd,void* arg,...){
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// init driver
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static int init(sh_video_t *sh){
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return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_BGR24);
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unsigned char *palette = (unsigned char *)sh->bih+40;
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int i;
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unsigned short color;
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// if BGR15 & BGR16, modify palette in place
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for (i = 0; i < sh->bih->biClrUsed; i++)
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{
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}
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return mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_BGR24);
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}
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// uninit driver
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@ -42,6 +51,134 @@ static void uninit(sh_video_t *sh){
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} \
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stream_byte = encoded[stream_ptr++];
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void decode_msrle4(
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unsigned char *encoded,
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int encoded_size,
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unsigned char *decoded,
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int width,
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int height,
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unsigned char *palette_map,
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int bits_per_pixel)
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{
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int bytes_per_pixel = (bits_per_pixel + 1) / 8;
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unsigned char r1, g1, b1;
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unsigned char r2, g2, b2;
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int stream_ptr = 0;
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unsigned char rle_code;
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unsigned char extra_byte;
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unsigned char stream_byte;
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int frame_size = width * height * bytes_per_pixel;
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int pixel_ptr = 0;
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int row_dec = width * bytes_per_pixel;
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int row_ptr = (height - 1) * row_dec;
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int i;
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while (row_ptr >= 0)
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{
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FETCH_NEXT_STREAM_BYTE();
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rle_code = stream_byte;
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if (rle_code == 0)
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{
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// fetch the next byte to see how to handle escape code
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FETCH_NEXT_STREAM_BYTE();
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if (stream_byte == 0)
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{
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// line is done, goto the next one
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row_ptr -= row_dec;
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pixel_ptr = 0;
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}
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else if (stream_byte == 1)
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// decode is done
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return;
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else if (stream_byte == 2)
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{
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// reposition frame decode coordinates
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FETCH_NEXT_STREAM_BYTE();
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pixel_ptr += stream_byte * bytes_per_pixel;
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FETCH_NEXT_STREAM_BYTE();
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row_ptr -= stream_byte * row_dec;
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}
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else
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{
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// copy pixels from encoded stream
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rle_code = stream_byte;
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rle_code /= 2;
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extra_byte = rle_code & 0x01;
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if ((row_ptr + pixel_ptr + rle_code * bytes_per_pixel > frame_size) ||
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(row_ptr < 0))
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{
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mp_msg(MSGT_DECVIDEO, MSGL_WARN,
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"MS RLE: frame ptr just went out of bounds (1)\n");
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return;
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}
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for (i = 0; i < rle_code; i++)
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{
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if (pixel_ptr >= row_dec)
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break;
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r1 = palette_map[(encoded[stream_ptr + i] >> 4) * 4 + 2];
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g1 = palette_map[(encoded[stream_ptr + i] >> 4) * 4 + 1];
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b1 = palette_map[(encoded[stream_ptr + i] >> 4) * 4 + 0];
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decoded[row_ptr + pixel_ptr + 0] = b1;
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decoded[row_ptr + pixel_ptr + 1] = g1;
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decoded[row_ptr + pixel_ptr + 2] = r1;
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pixel_ptr += bytes_per_pixel;
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if (pixel_ptr >= row_dec)
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break;
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r1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 4 + 2];
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g1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 4 + 1];
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b1 = palette_map[(encoded[stream_ptr + i] & 0x0F) * 4 + 0];
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decoded[row_ptr + pixel_ptr + 0] = b1;
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decoded[row_ptr + pixel_ptr + 1] = g1;
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decoded[row_ptr + pixel_ptr + 2] = r1;
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pixel_ptr += bytes_per_pixel;
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}
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stream_ptr += rle_code;
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// if the RLE code is odd, skip a byte in the stream
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if (extra_byte)
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stream_ptr++;
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}
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}
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else
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{
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// decode a run of data
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FETCH_NEXT_STREAM_BYTE();
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r1 = palette_map[(stream_byte >> 4) * 4 + 2];
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g1 = palette_map[(stream_byte >> 4) * 4 + 1];
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b1 = palette_map[(stream_byte >> 4) * 4 + 0];
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r2 = palette_map[(stream_byte & 0x0F) * 4 + 2];
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g2 = palette_map[(stream_byte & 0x0F) * 4 + 1];
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b2 = palette_map[(stream_byte & 0x0F) * 4 + 0];
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for (i = 0; i < rle_code; i++)
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{
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if (pixel_ptr >= row_dec)
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break;
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if ((i & 1) == 0)
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{
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decoded[row_ptr + pixel_ptr + 0] = b1;
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decoded[row_ptr + pixel_ptr + 1] = g1;
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decoded[row_ptr + pixel_ptr + 2] = r1;
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}
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else
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{
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decoded[row_ptr + pixel_ptr + 0] = b2;
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decoded[row_ptr + pixel_ptr + 1] = g2;
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decoded[row_ptr + pixel_ptr + 2] = r2;
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}
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pixel_ptr += bytes_per_pixel;
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}
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}
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}
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// one last sanity check on the way out
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if (stream_ptr < encoded_size)
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mp_msg(MSGT_DECVIDEO, MSGL_WARN,
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"MS RLE: ended frame decode with bytes left over (%d < %d)\n",
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stream_ptr, encoded_size);
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}
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void decode_msrle8(
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unsigned char *encoded,
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@ -50,8 +187,9 @@ void decode_msrle8(
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int width,
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int height,
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unsigned char *palette_map,
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int bytes_per_pixel)
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int bits_per_pixel)
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{
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int bytes_per_pixel = (bits_per_pixel + 1) / 8;
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unsigned char r, g, b;
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int stream_ptr = 0;
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unsigned char rle_code;
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@ -62,18 +200,6 @@ void decode_msrle8(
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int row_dec = width * bytes_per_pixel;
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int row_ptr = (height - 1) * row_dec;
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/*
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static int counter = 0;
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int i;
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printf ("run %d: ", counter++);
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for (i = 0; i < 16; i++)
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printf (" %02X", encoded[i]);
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printf ("\n");
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for (i = encoded_size - 16; i < encoded_size; i++)
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printf (" (%d)%02X", i, encoded[i]);
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printf ("\n");
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*/
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while (row_ptr >= 0)
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{
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FETCH_NEXT_STREAM_BYTE();
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@ -178,11 +304,21 @@ static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
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sh->disp_w, sh->disp_h);
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if(!mpi) return NULL;
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decode_msrle8(
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if (sh->format == 1)
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decode_msrle8(
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data,len, mpi->planes[0],
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sh->disp_w, sh->disp_h,
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(unsigned char *)sh->bih+40,
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mpi->bpp/8);
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mpi->bpp);
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else if (sh->format == 2)
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decode_msrle4(
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data,len, mpi->planes[0],
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sh->disp_w, sh->disp_h,
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(unsigned char *)sh->bih+40,
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mpi->bpp);
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else
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mp_msg(MSGT_DECVIDEO, MSGL_WARN,
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"MS RLE: Don't know how to decode format %08X", sh->format);
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return mpi;
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}
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