diff options
Diffstat (limited to 'ffmpeg/libavcodec/parser.c')
| -rw-r--r-- | ffmpeg/libavcodec/parser.c | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/ffmpeg/libavcodec/parser.c b/ffmpeg/libavcodec/parser.c deleted file mode 100644 index 083ce02..0000000 --- a/ffmpeg/libavcodec/parser.c +++ /dev/null @@ -1,307 +0,0 @@ -/* - * Audio and Video frame extraction - * Copyright (c) 2003 Fabrice Bellard - * Copyright (c) 2003 Michael Niedermayer - * - * 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 - */ - -#include <stdint.h> -#include <string.h> - -#include "parser.h" -#include "libavutil/atomic.h" -#include "libavutil/mem.h" - -static AVCodecParser *av_first_parser = NULL; - -AVCodecParser* av_parser_next(AVCodecParser *p){ - if(p) return p->next; - else return av_first_parser; -} - -void av_register_codec_parser(AVCodecParser *parser) -{ - do { - parser->next = av_first_parser; - } while (parser->next != avpriv_atomic_ptr_cas((void * volatile *)&av_first_parser, parser->next, parser)); -} - -AVCodecParserContext *av_parser_init(int codec_id) -{ - AVCodecParserContext *s = NULL; - AVCodecParser *parser; - int ret; - - if(codec_id == AV_CODEC_ID_NONE) - return NULL; - - for(parser = av_first_parser; parser != NULL; parser = parser->next) { - if (parser->codec_ids[0] == codec_id || - parser->codec_ids[1] == codec_id || - parser->codec_ids[2] == codec_id || - parser->codec_ids[3] == codec_id || - parser->codec_ids[4] == codec_id) - goto found; - } - return NULL; - found: - s = av_mallocz(sizeof(AVCodecParserContext)); - if (!s) - goto err_out; - s->parser = parser; - s->priv_data = av_mallocz(parser->priv_data_size); - if (!s->priv_data) - goto err_out; - s->fetch_timestamp=1; - s->pict_type = AV_PICTURE_TYPE_I; - if (parser->parser_init) { - ret = parser->parser_init(s); - if (ret != 0) - goto err_out; - } - s->key_frame = -1; - s->convergence_duration = 0; - s->dts_sync_point = INT_MIN; - s->dts_ref_dts_delta = INT_MIN; - s->pts_dts_delta = INT_MIN; - return s; - -err_out: - if (s) - av_freep(&s->priv_data); - av_free(s); - return NULL; -} - -void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove){ - int i; - - s->dts= s->pts= AV_NOPTS_VALUE; - s->pos= -1; - s->offset= 0; - for(i = 0; i < AV_PARSER_PTS_NB; i++) { - if ( s->cur_offset + off >= s->cur_frame_offset[i] - && (s->frame_offset < s->cur_frame_offset[i] || - (!s->frame_offset && !s->next_frame_offset)) // first field/frame - // check disabled since MPEG-TS does not send complete PES packets - && /*s->next_frame_offset + off <*/ s->cur_frame_end[i]){ - s->dts= s->cur_frame_dts[i]; - s->pts= s->cur_frame_pts[i]; - s->pos= s->cur_frame_pos[i]; - s->offset = s->next_frame_offset - s->cur_frame_offset[i]; - if(remove) - s->cur_frame_offset[i]= INT64_MAX; - if(s->cur_offset + off < s->cur_frame_end[i]) - break; - } - } -} - -int av_parser_parse2(AVCodecParserContext *s, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, - int64_t pts, int64_t dts, - int64_t pos) -{ - int index, i; - uint8_t dummy_buf[FF_INPUT_BUFFER_PADDING_SIZE]; - - if(!(s->flags & PARSER_FLAG_FETCHED_OFFSET)) { - s->next_frame_offset = - s->cur_offset = pos; - s->flags |= PARSER_FLAG_FETCHED_OFFSET; - } - - if (buf_size == 0) { - /* padding is always necessary even if EOF, so we add it here */ - memset(dummy_buf, 0, sizeof(dummy_buf)); - buf = dummy_buf; - } else if (s->cur_offset + buf_size != - s->cur_frame_end[s->cur_frame_start_index]) { /* skip remainder packets */ - /* add a new packet descriptor */ - i = (s->cur_frame_start_index + 1) & (AV_PARSER_PTS_NB - 1); - s->cur_frame_start_index = i; - s->cur_frame_offset[i] = s->cur_offset; - s->cur_frame_end[i] = s->cur_offset + buf_size; - s->cur_frame_pts[i] = pts; - s->cur_frame_dts[i] = dts; - s->cur_frame_pos[i] = pos; - } - - if (s->fetch_timestamp){ - s->fetch_timestamp=0; - s->last_pts = s->pts; - s->last_dts = s->dts; - s->last_pos = s->pos; - ff_fetch_timestamp(s, 0, 0); - } - - /* WARNING: the returned index can be negative */ - index = s->parser->parser_parse(s, avctx, (const uint8_t **)poutbuf, poutbuf_size, buf, buf_size); - /* update the file pointer */ - if (*poutbuf_size) { - /* fill the data for the current frame */ - s->frame_offset = s->next_frame_offset; - - /* offset of the next frame */ - s->next_frame_offset = s->cur_offset + index; - s->fetch_timestamp=1; - } - if (index < 0) - index = 0; - s->cur_offset += index; - return index; -} - -int av_parser_change(AVCodecParserContext *s, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, int keyframe){ - - if(s && s->parser->split){ - if((avctx->flags & CODEC_FLAG_GLOBAL_HEADER) || (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)){ - int i= s->parser->split(avctx, buf, buf_size); - buf += i; - buf_size -= i; - } - } - - /* cast to avoid warning about discarding qualifiers */ - *poutbuf= (uint8_t *) buf; - *poutbuf_size= buf_size; - if(avctx->extradata){ - if( (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)) - /*||(s->pict_type != AV_PICTURE_TYPE_I && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_NOKEY))*/ - /*||(? && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_BEGIN)*/){ - int size= buf_size + avctx->extradata_size; - *poutbuf_size= size; - *poutbuf= av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); - - memcpy(*poutbuf, avctx->extradata, avctx->extradata_size); - memcpy((*poutbuf) + avctx->extradata_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE); - return 1; - } - } - - return 0; -} - -void av_parser_close(AVCodecParserContext *s) -{ - if(s){ - if (s->parser->parser_close) - s->parser->parser_close(s); - av_free(s->priv_data); - av_free(s); - } -} - -/*****************************************************/ - -int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size) -{ - if(pc->overread){ - av_dlog(NULL, "overread %d, state:%X next:%d index:%d o_index:%d\n", - pc->overread, pc->state, next, pc->index, pc->overread_index); - av_dlog(NULL, "%X %X %X %X\n", (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]); - } - - /* Copy overread bytes from last frame into buffer. */ - for(; pc->overread>0; pc->overread--){ - pc->buffer[pc->index++]= pc->buffer[pc->overread_index++]; - } - - /* flush remaining if EOF */ - if(!*buf_size && next == END_NOT_FOUND){ - next= 0; - } - - pc->last_index= pc->index; - - /* copy into buffer end return */ - if(next == END_NOT_FOUND){ - void* new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size, (*buf_size) + pc->index + FF_INPUT_BUFFER_PADDING_SIZE); - - if(!new_buffer) { - pc->index = 0; - return AVERROR(ENOMEM); - } - pc->buffer = new_buffer; - memcpy(&pc->buffer[pc->index], *buf, *buf_size); - pc->index += *buf_size; - return -1; - } - - *buf_size= - pc->overread_index= pc->index + next; - - /* append to buffer */ - if(pc->index){ - void* new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size, next + pc->index + FF_INPUT_BUFFER_PADDING_SIZE); - if(!new_buffer) { - pc->overread_index = - pc->index = 0; - return AVERROR(ENOMEM); - } - pc->buffer = new_buffer; - if (next > -FF_INPUT_BUFFER_PADDING_SIZE) - memcpy(&pc->buffer[pc->index], *buf, - next + FF_INPUT_BUFFER_PADDING_SIZE); - pc->index = 0; - *buf= pc->buffer; - } - - /* store overread bytes */ - for(;next < 0; next++){ - pc->state = (pc->state<<8) | pc->buffer[pc->last_index + next]; - pc->state64 = (pc->state64<<8) | pc->buffer[pc->last_index + next]; - pc->overread++; - } - - if(pc->overread){ - av_dlog(NULL, "overread %d, state:%X next:%d index:%d o_index:%d\n", - pc->overread, pc->state, next, pc->index, pc->overread_index); - av_dlog(NULL, "%X %X %X %X\n", (*buf)[0], (*buf)[1],(*buf)[2],(*buf)[3]); - } - - return 0; -} - -void ff_parse_close(AVCodecParserContext *s) -{ - ParseContext *pc = s->priv_data; - - av_freep(&pc->buffer); -} - -/*************************/ - -int ff_mpeg4video_split(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - int i; - uint32_t state= -1; - - for(i=0; i<buf_size; i++){ - state= (state<<8) | buf[i]; - if(state == 0x1B3 || state == 0x1B6) - return i-3; - } - return 0; -} |