From 98c98e04ccae75ccaf0f3ebf18588bc0090dff8b Mon Sep 17 00:00:00 2001 From: Diego Biurrun Date: Thu, 3 May 2007 23:50:24 +0000 Subject: [PATCH] Move dca parser to its own file. Originally committed as revision 8881 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/Makefile | 1 + libavcodec/dca.c | 109 +--------------------------------- libavcodec/dca.h | 29 +++++++++ libavcodec/dca_parser.c | 127 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 158 insertions(+), 108 deletions(-) create mode 100644 libavcodec/dca.h create mode 100644 libavcodec/dca_parser.c diff --git a/libavcodec/Makefile b/libavcodec/Makefile index a7ef433102..1d160b90dd 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -276,6 +276,7 @@ OBJS-$(CONFIG_XVID) += xvidff.o xvid_rc.o OBJS-$(CONFIG_AAC_PARSER) += parser.o OBJS-$(CONFIG_AC3_PARSER) += parser.o ac3tab.o OBJS-$(CONFIG_CAVSVIDEO_PARSER) += cavs.o parser.o +OBJS-$(CONFIG_DCA_PARSER) += dca_parser.o OBJS-$(CONFIG_DVBSUB_PARSER) += dvbsubdec.o OBJS-$(CONFIG_DVDSUB_PARSER) += dvdsubdec.o OBJS-$(CONFIG_H261_PARSER) += h261.o diff --git a/libavcodec/dca.c b/libavcodec/dca.c index 5081eaae93..c3ade2f042 100644 --- a/libavcodec/dca.c +++ b/libavcodec/dca.c @@ -35,15 +35,7 @@ #include "bitstream.h" #include "dcadata.h" #include "dcahuff.h" -#include "parser.h" - -/** DCA syncwords, also used for bitstream type detection */ -//@{ -#define DCA_MARKER_RAW_BE 0x7FFE8001 -#define DCA_MARKER_RAW_LE 0xFE7F0180 -#define DCA_MARKER_14B_BE 0x1FFFE800 -#define DCA_MARKER_14B_LE 0xFF1F00E8 -//@} +#include "dca.h" //#define TRACE @@ -1255,102 +1247,3 @@ AVCodec dca_decoder = { .init = dca_decode_init, .decode = dca_decode_frame, }; - -#ifdef CONFIG_DCA_PARSER - -typedef struct DCAParseContext { - ParseContext pc; - uint32_t lastmarker; -} DCAParseContext; - -#define IS_MARKER(state, i, buf, buf_size) \ - ((state == DCA_MARKER_14B_LE && (i < buf_size-2) && (buf[i+1] & 0xF0) == 0xF0 && buf[i+2] == 0x07) \ - || (state == DCA_MARKER_14B_BE && (i < buf_size-2) && buf[i+1] == 0x07 && (buf[i+2] & 0xF0) == 0xF0) \ - || state == DCA_MARKER_RAW_LE || state == DCA_MARKER_RAW_BE) - -/** - * finds the end of the current frame in the bitstream. - * @return the position of the first byte of the next frame, or -1 - */ -static int dca_find_frame_end(DCAParseContext * pc1, const uint8_t * buf, - int buf_size) -{ - int start_found, i; - uint32_t state; - ParseContext *pc = &pc1->pc; - - start_found = pc->frame_start_found; - state = pc->state; - - i = 0; - if (!start_found) { - for (i = 0; i < buf_size; i++) { - state = (state << 8) | buf[i]; - if (IS_MARKER(state, i, buf, buf_size)) { - if (pc1->lastmarker && state == pc1->lastmarker) { - start_found = 1; - break; - } else if (!pc1->lastmarker) { - start_found = 1; - pc1->lastmarker = state; - break; - } - } - } - } - if (start_found) { - for (; i < buf_size; i++) { - state = (state << 8) | buf[i]; - if (state == pc1->lastmarker && IS_MARKER(state, i, buf, buf_size)) { - pc->frame_start_found = 0; - pc->state = -1; - return i - 3; - } - } - } - pc->frame_start_found = start_found; - pc->state = state; - return END_NOT_FOUND; -} - -static int dca_parse_init(AVCodecParserContext * s) -{ - DCAParseContext *pc1 = s->priv_data; - - pc1->lastmarker = 0; - return 0; -} - -static int dca_parse(AVCodecParserContext * s, - AVCodecContext * avctx, - uint8_t ** poutbuf, int *poutbuf_size, - const uint8_t * buf, int buf_size) -{ - DCAParseContext *pc1 = s->priv_data; - ParseContext *pc = &pc1->pc; - int next; - - if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { - next = buf_size; - } else { - next = dca_find_frame_end(pc1, buf, buf_size); - - if (ff_combine_frame(pc, next, (uint8_t **) & buf, &buf_size) < 0) { - *poutbuf = NULL; - *poutbuf_size = 0; - return buf_size; - } - } - *poutbuf = (uint8_t *) buf; - *poutbuf_size = buf_size; - return next; -} - -AVCodecParser dca_parser = { - {CODEC_ID_DTS}, - sizeof(DCAParseContext), - dca_parse_init, - dca_parse, - ff_parse_close, -}; -#endif /* CONFIG_DCA_PARSER */ diff --git a/libavcodec/dca.h b/libavcodec/dca.h new file mode 100644 index 0000000000..5e9b8a9cf0 --- /dev/null +++ b/libavcodec/dca.h @@ -0,0 +1,29 @@ +/* + * DCA compatible decoder + * Copyright (C) 2004 Gildas Bazin + * Copyright (C) 2004 Benjamin Zores + * Copyright (C) 2006 Benjamin Larsson + * Copyright (C) 2007 Konstantin Shishkov + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** DCA syncwords, also used for bitstream type detection */ +#define DCA_MARKER_RAW_BE 0x7FFE8001 +#define DCA_MARKER_RAW_LE 0xFE7F0180 +#define DCA_MARKER_14B_BE 0x1FFFE800 +#define DCA_MARKER_14B_LE 0xFF1F00E8 diff --git a/libavcodec/dca_parser.c b/libavcodec/dca_parser.c new file mode 100644 index 0000000000..db66b474f3 --- /dev/null +++ b/libavcodec/dca_parser.c @@ -0,0 +1,127 @@ +/* + * DCA parser + * Copyright (C) 2004 Gildas Bazin + * Copyright (C) 2004 Benjamin Zores + * Copyright (C) 2006 Benjamin Larsson + * Copyright (C) 2007 Konstantin Shishkov + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file dca_parser.c + */ + +#include "avcodec.h" +#include "parser.h" +#include "dca.h" + +typedef struct DCAParseContext { + ParseContext pc; + uint32_t lastmarker; +} DCAParseContext; + +#define IS_MARKER(state, i, buf, buf_size) \ + ((state == DCA_MARKER_14B_LE && (i < buf_size-2) && (buf[i+1] & 0xF0) == 0xF0 && buf[i+2] == 0x07) \ + || (state == DCA_MARKER_14B_BE && (i < buf_size-2) && buf[i+1] == 0x07 && (buf[i+2] & 0xF0) == 0xF0) \ + || state == DCA_MARKER_RAW_LE || state == DCA_MARKER_RAW_BE) + +/** + * finds the end of the current frame in the bitstream. + * @return the position of the first byte of the next frame, or -1 + */ +static int dca_find_frame_end(DCAParseContext * pc1, const uint8_t * buf, + int buf_size) +{ + int start_found, i; + uint32_t state; + ParseContext *pc = &pc1->pc; + + start_found = pc->frame_start_found; + state = pc->state; + + i = 0; + if (!start_found) { + for (i = 0; i < buf_size; i++) { + state = (state << 8) | buf[i]; + if (IS_MARKER(state, i, buf, buf_size)) { + if (pc1->lastmarker && state == pc1->lastmarker) { + start_found = 1; + break; + } else if (!pc1->lastmarker) { + start_found = 1; + pc1->lastmarker = state; + break; + } + } + } + } + if (start_found) { + for (; i < buf_size; i++) { + state = (state << 8) | buf[i]; + if (state == pc1->lastmarker && IS_MARKER(state, i, buf, buf_size)) { + pc->frame_start_found = 0; + pc->state = -1; + return i - 3; + } + } + } + pc->frame_start_found = start_found; + pc->state = state; + return END_NOT_FOUND; +} + +static int dca_parse_init(AVCodecParserContext * s) +{ + DCAParseContext *pc1 = s->priv_data; + + pc1->lastmarker = 0; + return 0; +} + +static int dca_parse(AVCodecParserContext * s, + AVCodecContext * avctx, + uint8_t ** poutbuf, int *poutbuf_size, + const uint8_t * buf, int buf_size) +{ + DCAParseContext *pc1 = s->priv_data; + ParseContext *pc = &pc1->pc; + int next; + + if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { + next = buf_size; + } else { + next = dca_find_frame_end(pc1, buf, buf_size); + + if (ff_combine_frame(pc, next, (uint8_t **) & buf, &buf_size) < 0) { + *poutbuf = NULL; + *poutbuf_size = 0; + return buf_size; + } + } + *poutbuf = (uint8_t *) buf; + *poutbuf_size = buf_size; + return next; +} + +AVCodecParser dca_parser = { + {CODEC_ID_DTS}, + sizeof(DCAParseContext), + dca_parse_init, + dca_parse, + ff_parse_close, +};