vl: initial commit of the bitstream parser

diff --git a/src/gallium/state_trackers/vdpau/decode.c b/src/gallium/state_trackers/vdpau/decode.c
index 3e7cb4a..03764a7 100644 (file)
--- a/src/gallium/state_trackers/vdpau/decode.c
+++ b/src/gallium/state_trackers/vdpau/decode.c
@@ -211,11 +211,19 @@ vlVdpDecoderRenderMpeg2    (vlVdpDecoder *vldecoder,
        
        ret = vlVdpCreateSurfaceTarget(vldecoder,t_vdp_surf);
 
-       vlVdpBitstreamToMacroblock(vpipe->screen, bitstream_buffers,
-                     &num_macroblocks, &pipe_macroblocks);
+       if (vlVdpMPEG2BitstreamToMacroblock(vpipe->screen, bitstream_buffers, bitstream_buffer_count,
+                     &num_macroblocks, &pipe_macroblocks))
+                                        {
+                                                debug_printf("[VDPAU] Error in frame-header. Skipping.\n");
+                                                
+                                                ret = VDP_STATUS_OK;
+                                                goto skip_frame;
+                                        }
                
        vpipe->set_decode_target(vpipe,t_surf);
-       vpipe->decode_macroblocks(vpipe, p_surf, f_surf, num_macroblocks, pipe_macroblocks, NULL);
+       vpipe->decode_macroblocks(vpipe, p_surf, f_surf, num_macroblocks, (struct pipe_macroblock *)pipe_macroblocks, NULL);
+       
+       skip_frame:
        return ret;
 }
 

diff --git a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c
index 3901966..d88afb4 100644 (file)
--- a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c
+++ b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c
@@ -27,18 +27,89 @@
 
 #include "mpeg2_bitstream_parser.h"
 
-void
-vlVdpBitstreamToMacroblock (
+int
+vlVdpMPEG2NextStartCode(struct vdpMPEG2BitstreamParser *parser)
+{
+       uint32_t integer = 0;
+       uint32_t bytes_to_end;
+       
+       /* Move cursor to the start of a byte */
+       while(parser->cursor % 8)
+               parser->cursor++;
+               
+       bytes_to_end = parser->cur_bitstream_length - parser->cursor/8 - 1;
+               
+       /* Read byte after byte, until startcode is found */
+       while(integer != 0x00000100)
+       {
+               if (bytes_to_end < 0)
+               {
+                       parser->state = MPEG2_HEADER_DONE;
+                       return 1;
+               }
+               
+               integer << 8;
+               integer = integer & (unsigned char)(parser->ptr_bitstream + parser->cursor/8)[0];
+       
+               bytes_to_end--;
+               parser->cursor += 8;
+               
+       }
+       
+       /* start_code found. rewind cursor a byte */
+       parser->cursor -= 8;
+       
+       return 0;
+}
+
+int
+vlVdpMPEG2BitstreamToMacroblock (
                  struct pipe_screen *screen,
                  VdpBitstreamBuffer const *bitstream_buffers,
+                 uint32_t bitstream_buffer_count,
           unsigned int *num_macroblocks,
           struct pipe_mpeg12_macroblock **pipe_macroblocks)
 {
-       debug_printf("[VDPAU] BitstreamToMacroblock not implemented yet");
-       assert(0);
-
+       bool b_header_done = false;
+       struct vdpMPEG2BitstreamParser parser;
+       
+       num_macroblocks[0] = 0;
+       
+       memset(&parser,0,sizeof(parser));
+       parser.state = MPEG2_HEADER_START_CODE;
+       parser.cur_bitstream_length = bitstream_buffers[0].bitstream_bytes;
+       parser.ptr_bitstream = (unsigned char *)bitstream_buffers[0].bitstream;
+       
+       /* Main header parser loop */
+       while(!b_header_done)
+       {
+               switch (parser.state)
+               {
+               case MPEG2_HEADER_START_CODE:
+                       if (vlVdpMPEG2NextStartCode(&parser))
+                               continue;
+                       
+                       /* Start_code found */
+                       switch ((parser.ptr_bitstream + parser.cursor/8)[0])
+                       {
+                               /* sequence_header_code */
+                               case 0xB3:
+                               debug_printf("[VDPAU][Bitstream parser] Sequence header code found at cursor pos: %d\n", parser.cursor);
+                               exit(1);
+                               break;
+                       }
+               
+               break;
+               case MPEG2_HEADER_DONE:
+                       debug_printf("[VDPAU][Bitstream parser] Done parsing current header\n");
+               break;
+               
+               }
+               
+               
+       }
        
 
-       return;
+       return 0;
 }
 

diff --git a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h
index 534503d..74a216a 100644 (file)
--- a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h
+++ b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h
@@ -32,10 +32,27 @@
 #include <pipe/p_video_state.h>
 #include "vdpau_private.h"
 
-void
-vlVdpBitstreamToMacroblock(struct pipe_screen *screen,
+enum vdpMPEG2States
+{
+       MPEG2_HEADER_START_CODE,
+       MPEG2_HEADER_DONE
+};
+
+struct vdpMPEG2BitstreamParser
+{
+       enum vdpMPEG2States state;
+       uint32_t cursor;                // current bit cursor
+       uint32_t cur_bitstream;
+       uint32_t cur_bitstream_length;
+       unsigned char *ptr_bitstream;
+};
+
+int
+vlVdpMPEG2BitstreamToMacroblock(struct pipe_screen *screen,
                   VdpBitstreamBuffer const *bitstream_buffers,
+                                 uint32_t bitstream_buffer_count,
                   unsigned int *num_macroblocks,
                   struct pipe_mpeg12_macroblock **pipe_macroblocks);
+                                 
 
 #endif // MPEG2_BITSTREAM_PARSER_H

diff --git a/src/gallium/state_trackers/xorg/xvmc/subpicture.c b/src/gallium/state_trackers/xorg/xvmc/subpicture.c
index 4f6c80d..7e82cd1 100644 (file)
--- a/src/gallium/state_trackers/xorg/xvmc/subpicture.c
+++ b/src/gallium/state_trackers/xorg/xvmc/subpicture.c
@@ -219,7 +219,7 @@ Status XvMCClearSubpicture(Display *dpy, XvMCSubpicture *subpicture, short x, sh
    if (!subpicture)
       return XvMCBadSubpicture;
                
-   /* Convert color to */
+   /* Convert color to float */
    util_format_read_4f(PIPE_FORMAT_B8G8R8A8_UNORM,
                     color_f, 1,
                     &color, 4,