diff options
Diffstat (limited to 'libmpeg2/decode.c')
| -rw-r--r-- | libmpeg2/decode.c | 452 |
1 files changed, 0 insertions, 452 deletions
diff --git a/libmpeg2/decode.c b/libmpeg2/decode.c deleted file mode 100644 index f30b86b740..0000000000 --- a/libmpeg2/decode.c +++ /dev/null @@ -1,452 +0,0 @@ -/* - * decode.c - * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org> - * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> - * - * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. - * See http://libmpeg2.sourceforge.net/ for updates. - * - * mpeg2dec is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * mpeg2dec is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * Modified for use with MPlayer, see libmpeg2_changes.diff for the exact changes. - * detailed changelog at http://svn.mplayerhq.hu/mplayer/trunk/ - * $Id$ - */ - -#include "config.h" - -#include <string.h> /* memcmp/memset, try to remove */ -#include <stdlib.h> -#include <inttypes.h> - -#include "mpeg2.h" -#include "attributes.h" -#include "mpeg2_internal.h" - -static int mpeg2_accels = 0; - -#define BUFFER_SIZE (1194 * 1024) - -const mpeg2_info_t * mpeg2_info (mpeg2dec_t * mpeg2dec) -{ - return &(mpeg2dec->info); -} - -static inline int skip_chunk (mpeg2dec_t * mpeg2dec, int bytes) -{ - uint8_t * current; - uint32_t shift; - uint8_t * limit; - uint8_t byte; - - if (!bytes) - return 0; - - current = mpeg2dec->buf_start; - shift = mpeg2dec->shift; - limit = current + bytes; - - do { - byte = *current++; - if (shift == 0x00000100) { - int skipped; - - mpeg2dec->shift = 0xffffff00; - skipped = current - mpeg2dec->buf_start; - mpeg2dec->buf_start = current; - return skipped; - } - shift = (shift | byte) << 8; - } while (current < limit); - - mpeg2dec->shift = shift; - mpeg2dec->buf_start = current; - return 0; -} - -static inline int copy_chunk (mpeg2dec_t * mpeg2dec, int bytes) -{ - uint8_t * current; - uint32_t shift; - uint8_t * chunk_ptr; - uint8_t * limit; - uint8_t byte; - - if (!bytes) - return 0; - - current = mpeg2dec->buf_start; - shift = mpeg2dec->shift; - chunk_ptr = mpeg2dec->chunk_ptr; - limit = current + bytes; - - do { - byte = *current++; - if (shift == 0x00000100) { - int copied; - - mpeg2dec->shift = 0xffffff00; - mpeg2dec->chunk_ptr = chunk_ptr + 1; - copied = current - mpeg2dec->buf_start; - mpeg2dec->buf_start = current; - return copied; - } - shift = (shift | byte) << 8; - *chunk_ptr++ = byte; - } while (current < limit); - - mpeg2dec->shift = shift; - mpeg2dec->buf_start = current; - return 0; -} - -void mpeg2_buffer (mpeg2dec_t * mpeg2dec, uint8_t * start, uint8_t * end) -{ - mpeg2dec->buf_start = start; - mpeg2dec->buf_end = end; -} - -int mpeg2_getpos (mpeg2dec_t * mpeg2dec) -{ - return mpeg2dec->buf_end - mpeg2dec->buf_start; -} - -static inline mpeg2_state_t seek_chunk (mpeg2dec_t * mpeg2dec) -{ - int size, skipped; - - size = mpeg2dec->buf_end - mpeg2dec->buf_start; - skipped = skip_chunk (mpeg2dec, size); - if (!skipped) { - mpeg2dec->bytes_since_tag += size; - return STATE_BUFFER; - } - mpeg2dec->bytes_since_tag += skipped; - mpeg2dec->code = mpeg2dec->buf_start[-1]; - return STATE_INTERNAL_NORETURN; -} - -mpeg2_state_t mpeg2_seek_header (mpeg2dec_t * mpeg2dec) -{ - while (!(mpeg2dec->code == 0xb3 || - ((mpeg2dec->code == 0xb7 || mpeg2dec->code == 0xb8 || - !mpeg2dec->code) && mpeg2dec->sequence.width != (unsigned)-1))) - if (seek_chunk (mpeg2dec) == STATE_BUFFER) - return STATE_BUFFER; - mpeg2dec->chunk_start = mpeg2dec->chunk_ptr = mpeg2dec->chunk_buffer; - mpeg2dec->user_data_len = 0; - return ((mpeg2dec->code == 0xb7) ? - mpeg2_header_end (mpeg2dec) : mpeg2_parse_header (mpeg2dec)); -} - -#define RECEIVED(code,state) (((state) << 8) + (code)) - -mpeg2_state_t mpeg2_parse (mpeg2dec_t * mpeg2dec) -{ - int size_buffer, size_chunk, copied; - - if (mpeg2dec->action) { - mpeg2_state_t state; - - state = mpeg2dec->action (mpeg2dec); - if ((int)state > (int)STATE_INTERNAL_NORETURN) - return state; - } - - while (1) { - while ((unsigned) (mpeg2dec->code - mpeg2dec->first_decode_slice) < - mpeg2dec->nb_decode_slices) { - size_buffer = mpeg2dec->buf_end - mpeg2dec->buf_start; - size_chunk = (mpeg2dec->chunk_buffer + BUFFER_SIZE - - mpeg2dec->chunk_ptr); - if (size_buffer <= size_chunk) { - copied = copy_chunk (mpeg2dec, size_buffer); - if (!copied) { - mpeg2dec->bytes_since_tag += size_buffer; - mpeg2dec->chunk_ptr += size_buffer; - return STATE_BUFFER; - } - } else { - copied = copy_chunk (mpeg2dec, size_chunk); - if (!copied) { - /* filled the chunk buffer without finding a start code */ - mpeg2dec->bytes_since_tag += size_chunk; - mpeg2dec->action = seek_chunk; - return STATE_INVALID; - } - } - mpeg2dec->bytes_since_tag += copied; - - mpeg2_slice (&(mpeg2dec->decoder), mpeg2dec->code, - mpeg2dec->chunk_start); - mpeg2dec->code = mpeg2dec->buf_start[-1]; - mpeg2dec->chunk_ptr = mpeg2dec->chunk_start; - } - if ((unsigned) (mpeg2dec->code - 1) >= 0xb0 - 1) - break; - if (seek_chunk (mpeg2dec) == STATE_BUFFER) - return STATE_BUFFER; - } - - mpeg2dec->action = mpeg2_seek_header; - switch (mpeg2dec->code) { - case 0x00: - return mpeg2dec->state; - case 0xb3: - case 0xb7: - case 0xb8: - return (mpeg2dec->state == STATE_SLICE) ? STATE_SLICE : STATE_INVALID; - default: - mpeg2dec->action = seek_chunk; - return STATE_INVALID; - } -} - -mpeg2_state_t mpeg2_parse_header (mpeg2dec_t * mpeg2dec) -{ - static int (* process_header[]) (mpeg2dec_t * mpeg2dec) = { - mpeg2_header_picture, mpeg2_header_extension, mpeg2_header_user_data, - mpeg2_header_sequence, NULL, NULL, NULL, NULL, mpeg2_header_gop - }; - int size_buffer, size_chunk, copied; - - mpeg2dec->action = mpeg2_parse_header; - mpeg2dec->info.user_data = NULL; mpeg2dec->info.user_data_len = 0; - while (1) { - size_buffer = mpeg2dec->buf_end - mpeg2dec->buf_start; - size_chunk = (mpeg2dec->chunk_buffer + BUFFER_SIZE - - mpeg2dec->chunk_ptr); - if (size_buffer <= size_chunk) { - copied = copy_chunk (mpeg2dec, size_buffer); - if (!copied) { - mpeg2dec->bytes_since_tag += size_buffer; - mpeg2dec->chunk_ptr += size_buffer; - return STATE_BUFFER; - } - } else { - copied = copy_chunk (mpeg2dec, size_chunk); - if (!copied) { - /* filled the chunk buffer without finding a start code */ - mpeg2dec->bytes_since_tag += size_chunk; - mpeg2dec->code = 0xb4; - mpeg2dec->action = mpeg2_seek_header; - return STATE_INVALID; - } - } - mpeg2dec->bytes_since_tag += copied; - - if (process_header[mpeg2dec->code & 0x0b] (mpeg2dec)) { - mpeg2dec->code = mpeg2dec->buf_start[-1]; - mpeg2dec->action = mpeg2_seek_header; - return STATE_INVALID; - } - - mpeg2dec->code = mpeg2dec->buf_start[-1]; - switch (RECEIVED (mpeg2dec->code, mpeg2dec->state)) { - - /* state transition after a sequence header */ - case RECEIVED (0x00, STATE_SEQUENCE): - case RECEIVED (0xb8, STATE_SEQUENCE): - mpeg2_header_sequence_finalize (mpeg2dec); - break; - - /* other legal state transitions */ - case RECEIVED (0x00, STATE_GOP): - mpeg2_header_gop_finalize (mpeg2dec); - break; - case RECEIVED (0x01, STATE_PICTURE): - case RECEIVED (0x01, STATE_PICTURE_2ND): - mpeg2_header_picture_finalize (mpeg2dec, mpeg2_accels); - mpeg2dec->action = mpeg2_header_slice_start; - break; - - /* legal headers within a given state */ - case RECEIVED (0xb2, STATE_SEQUENCE): - case RECEIVED (0xb2, STATE_GOP): - case RECEIVED (0xb2, STATE_PICTURE): - case RECEIVED (0xb2, STATE_PICTURE_2ND): - case RECEIVED (0xb5, STATE_SEQUENCE): - case RECEIVED (0xb5, STATE_PICTURE): - case RECEIVED (0xb5, STATE_PICTURE_2ND): - mpeg2dec->chunk_ptr = mpeg2dec->chunk_start; - continue; - - default: - mpeg2dec->action = mpeg2_seek_header; - return STATE_INVALID; - } - - mpeg2dec->chunk_start = mpeg2dec->chunk_ptr = mpeg2dec->chunk_buffer; - mpeg2dec->user_data_len = 0; - return mpeg2dec->state; - } -} - -int mpeg2_convert (mpeg2dec_t * mpeg2dec, mpeg2_convert_t convert, void * arg) -{ - mpeg2_convert_init_t convert_init; - int error; - - error = convert (MPEG2_CONVERT_SET, NULL, &(mpeg2dec->sequence), 0, - mpeg2_accels, arg, &convert_init); - if (!error) { - mpeg2dec->convert = convert; - mpeg2dec->convert_arg = arg; - mpeg2dec->convert_id_size = convert_init.id_size; - mpeg2dec->convert_stride = 0; - } - return error; -} - -int mpeg2_stride (mpeg2dec_t * mpeg2dec, int stride) -{ - if (!mpeg2dec->convert) { - if (stride < (int) mpeg2dec->sequence.width) - stride = mpeg2dec->sequence.width; - mpeg2dec->decoder.stride_frame = stride; - } else { - mpeg2_convert_init_t convert_init; - - stride = mpeg2dec->convert (MPEG2_CONVERT_STRIDE, NULL, - &(mpeg2dec->sequence), stride, - mpeg2_accels, mpeg2dec->convert_arg, - &convert_init); - mpeg2dec->convert_id_size = convert_init.id_size; - mpeg2dec->convert_stride = stride; - } - return stride; -} - -void mpeg2_set_buf (mpeg2dec_t * mpeg2dec, uint8_t * buf[3], void * id) -{ - mpeg2_fbuf_t * fbuf; - - if (mpeg2dec->custom_fbuf) { - if (mpeg2dec->state == STATE_SEQUENCE) { - mpeg2dec->fbuf[2] = mpeg2dec->fbuf[1]; - mpeg2dec->fbuf[1] = mpeg2dec->fbuf[0]; - } - mpeg2_set_fbuf (mpeg2dec, (mpeg2dec->decoder.coding_type == - PIC_FLAG_CODING_TYPE_B)); - fbuf = mpeg2dec->fbuf[0]; - } else { - fbuf = &(mpeg2dec->fbuf_alloc[mpeg2dec->alloc_index].fbuf); - mpeg2dec->alloc_index_user = ++mpeg2dec->alloc_index; - } - fbuf->buf[0] = buf[0]; - fbuf->buf[1] = buf[1]; - fbuf->buf[2] = buf[2]; - fbuf->id = id; - // HACK! FIXME! At first I frame, copy pointers to prediction frame too! - if (mpeg2dec->custom_fbuf && !mpeg2dec->fbuf[1]->buf[0]){ - mpeg2dec->fbuf[1]->buf[0]=buf[0]; - mpeg2dec->fbuf[1]->buf[1]=buf[1]; - mpeg2dec->fbuf[1]->buf[2]=buf[2]; - mpeg2dec->fbuf[1]->id=NULL; - } -// printf("libmpeg2: FBUF 0:%p 1:%p 2:%p\n", -// mpeg2dec->fbuf[0]->buf[0],mpeg2dec->fbuf[1]->buf[0],mpeg2dec->fbuf[2]->buf[0]); -} - -void mpeg2_custom_fbuf (mpeg2dec_t * mpeg2dec, int custom_fbuf) -{ - mpeg2dec->custom_fbuf = custom_fbuf; -} - -void mpeg2_skip (mpeg2dec_t * mpeg2dec, int skip) -{ - mpeg2dec->first_decode_slice = 1; - mpeg2dec->nb_decode_slices = skip ? 0 : (0xb0 - 1); -} - -void mpeg2_slice_region (mpeg2dec_t * mpeg2dec, int start, int end) -{ - start = (start < 1) ? 1 : (start > 0xb0) ? 0xb0 : start; - end = (end < start) ? start : (end > 0xb0) ? 0xb0 : end; - mpeg2dec->first_decode_slice = start; - mpeg2dec->nb_decode_slices = end - start; -} - -void mpeg2_tag_picture (mpeg2dec_t * mpeg2dec, uint32_t tag, uint32_t tag2) -{ - mpeg2dec->tag_previous = mpeg2dec->tag_current; - mpeg2dec->tag2_previous = mpeg2dec->tag2_current; - mpeg2dec->tag_current = tag; - mpeg2dec->tag2_current = tag2; - mpeg2dec->num_tags++; - mpeg2dec->bytes_since_tag = 0; -} - -uint32_t mpeg2_accel (uint32_t accel) -{ - if (!mpeg2_accels) { - mpeg2_accels = mpeg2_detect_accel (accel) | MPEG2_ACCEL_DETECT; - mpeg2_cpu_state_init (mpeg2_accels); - mpeg2_idct_init (mpeg2_accels); - mpeg2_mc_init (mpeg2_accels); - } - return mpeg2_accels & ~MPEG2_ACCEL_DETECT; -} - -void mpeg2_reset (mpeg2dec_t * mpeg2dec, int full_reset) -{ - mpeg2dec->buf_start = mpeg2dec->buf_end = NULL; - mpeg2dec->num_tags = 0; - mpeg2dec->shift = 0xffffff00; - mpeg2dec->code = 0xb4; - mpeg2dec->action = mpeg2_seek_header; - mpeg2dec->state = STATE_INVALID; - mpeg2dec->first = 1; - - mpeg2_reset_info(&(mpeg2dec->info)); - mpeg2dec->info.gop = NULL; - mpeg2dec->info.user_data = NULL; - mpeg2dec->info.user_data_len = 0; - if (full_reset) { - mpeg2dec->info.sequence = NULL; - mpeg2_header_state_init (mpeg2dec); - } - -} - -mpeg2dec_t * mpeg2_init (void) -{ - mpeg2dec_t * mpeg2dec; - - mpeg2_accel (MPEG2_ACCEL_DETECT); - - mpeg2dec = (mpeg2dec_t *) mpeg2_malloc (sizeof (mpeg2dec_t), - MPEG2_ALLOC_MPEG2DEC); - if (mpeg2dec == NULL) - return NULL; - - memset (mpeg2dec->decoder.DCTblock, 0, 64 * sizeof (int16_t)); - memset (mpeg2dec->quantizer_matrix, 0, 4 * 64 * sizeof (uint8_t)); - - mpeg2dec->chunk_buffer = (uint8_t *) mpeg2_malloc (BUFFER_SIZE + 4, - MPEG2_ALLOC_CHUNK); - - mpeg2dec->sequence.width = (unsigned)-1; - mpeg2_reset (mpeg2dec, 1); - - return mpeg2dec; -} - -void mpeg2_close (mpeg2dec_t * mpeg2dec) -{ - mpeg2_header_state_init (mpeg2dec); - mpeg2_free (mpeg2dec->chunk_buffer); - mpeg2_free (mpeg2dec); -} |