From 2990292f0fdf36ae55c909da84f8927dc1aa9ae1 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Thomas=20Balling=20S=C3=B8rensen?= Date: Wed, 13 Oct 2010 11:27:07 +0200 Subject: [PATCH] vl: more work on the bitstream_parser --- .../vdpau/mpeg2_bitstream_parser.c | 83 +++++++++++++------ .../vdpau/mpeg2_bitstream_parser.h | 18 ++-- 2 files changed, 70 insertions(+), 31 deletions(-) diff --git a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c index 436e7908e5b..90936584893 100644 --- a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c +++ b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.c @@ -24,7 +24,8 @@ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ - +#include +#include #include "mpeg2_bitstream_parser.h" int @@ -32,31 +33,24 @@ vlVdpMPEG2NextStartCode(struct vdpMPEG2BitstreamParser *parser) { uint32_t integer = 0xffffff00; uint8_t * ptr_read = parser->ptr_bitstream; - int32_t bytes_to_end; - - /* Move cursor to the start of a byte */ - while(parser->cursor % 8) - parser->cursor++; + int8_t * bytes_to_end; - bytes_to_end = parser->cur_bitstream_length - parser->cursor/8 - 1; + bytes_to_end = parser->ptr_bitstream_end - parser->ptr_bitstream; /* Read byte after byte, until startcode is found */ while(integer != 0x00000100) { - if (bytes_to_end < 0) + if (bytes_to_end <= 0) { - parser->state = MPEG2_HEADER_DONE; - return 1; + parser->state = MPEG2_BITSTREAM_DONE; + parser->code = 0; + return 0; } integer = ( integer | *ptr_read++ ) << 8; - - debug_printf("[VDPAU][Bitstream parser] Current read uint32_t: %08x .. Bytes to end: %d\n", integer,bytes_to_end); - - bytes_to_end--; - parser->cursor += 8; - + bytes_to_end--; } - + parser->ptr_bitstream = ptr_read; + parser->code = parser->ptr_bitstream; /* start_code found. rewind cursor a byte */ //parser->cursor -= 8; @@ -74,37 +68,74 @@ vlVdpMPEG2BitstreamToMacroblock ( bool b_header_done = false; struct vdpMPEG2BitstreamParser parser; - debug_printf("[VDPAU] Starting decoding MPEG2 stream"); + #if(1) + FILE *fp; + + if ((fp = fopen("binout", "w"))==NULL) { + printf("Cannot open file.\n"); + exit(1); + } + fwrite(bitstream_buffers[0].bitstream, 1, bitstream_buffers[0].bitstream_bytes, fp); + fclose(fp); + + #endif + + + debug_printf("[VDPAU] Starting decoding MPEG2 stream\n"); 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; + parser.ptr_bitstream_end = parser.ptr_bitstream + bitstream_buffers[0].bitstream_bytes; /* Main header parser loop */ while(!b_header_done) { switch (parser.state) { - case MPEG2_HEADER_START_CODE: + case MPEG2_SEEK_HEADER: if (vlVdpMPEG2NextStartCode(&parser)) exit(1); - debug_printf("[VDPAU] START_CODE: %02x\n",(parser.ptr_bitstream + parser.cursor/8)[0]); + break; /* Start_code found */ - switch ((parser.ptr_bitstream + parser.cursor/8)[0]) + switch (parser.code) { /* sequence_header_code */ case 0xB3: - debug_printf("[VDPAU][Bitstream parser] Sequence header code found at cursor pos: %d\n", parser.cursor); - exit(1); + debug_printf("[VDPAU][Bitstream parser] Sequence header code found\n"); + + /* We dont need to read this, because we already have this information */ + break; + case 0xB5: + debug_printf("[VDPAU][Bitstream parser] Extension start code found\n"); + //exit(1); + break; + + case 0xB8: + debug_printf("[VDPAU][Bitstream parser] Extension start code found\n"); + //exit(1); break; + } break; - case MPEG2_HEADER_DONE: - debug_printf("[VDPAU][Bitstream parser] Done parsing current header\n"); + case MPEG2_BITSTREAM_DONE: + if (parser.cur_bitstream < bitstream_buffer_count - 1) + { + debug_printf("[VDPAU][Bitstream parser] Done parsing current bitstream. Moving to the next\n"); + parser.cur_bitstream++; + parser.ptr_bitstream = (unsigned char *)bitstream_buffers[parser.cur_bitstream].bitstream; + parser.ptr_bitstream_end = parser.ptr_bitstream + bitstream_buffers[parser.cur_bitstream].bitstream_bytes; + parser.state = MPEG2_HEADER_START_CODE; + } + else + { + debug_printf("[VDPAU][Bitstream parser] Done with frame\n"); + exit(0); + // return 0; + } break; } diff --git a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h index b7e778f780b..414d6597c6c 100644 --- a/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h +++ b/src/gallium/state_trackers/vdpau/mpeg2_bitstream_parser.h @@ -34,17 +34,25 @@ enum vdpMPEG2States { - MPEG2_HEADER_START_CODE, - MPEG2_HEADER_DONE + MPEG2_SEEK_HEADER, + MPEG2_HEADER_DONE, + MPEG2_BITSTREAM_DONE + MPEG2 +}; + +enum vdpMPEG2Action +{ + MPEG2_ }; struct vdpMPEG2BitstreamParser { enum vdpMPEG2States state; - uint32_t cursor; // current bit cursor + enum vdpMPEG2Actions action; uint32_t cur_bitstream; - uint32_t cur_bitstream_length; - uint8_t *ptr_bitstream; + const uint8_t *ptr_bitstream_end; + const uint8_t *ptr_bitstream; + uint8_t code; /* The decoded bitstream goes here: */ /* Sequence_header_info */ -- 2.30.2