diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/parser.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/parser.c | 316 |
1 files changed, 0 insertions, 316 deletions
diff --git a/contrib/ffmpeg/libavcodec/parser.c b/contrib/ffmpeg/libavcodec/parser.c deleted file mode 100644 index b0a6a2a1b..000000000 --- a/contrib/ffmpeg/libavcodec/parser.c +++ /dev/null @@ -1,316 +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 "parser.h" - -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) -{ - parser->next = av_first_parser; - av_first_parser = parser; -} - -AVCodecParserContext *av_parser_init(int codec_id) -{ - AVCodecParserContext *s; - AVCodecParser *parser; - int ret; - - if(codec_id == 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) - return NULL; - s->parser = parser; - s->priv_data = av_mallocz(parser->priv_data_size); - if (!s->priv_data) { - av_free(s); - return NULL; - } - if (parser->parser_init) { - ret = parser->parser_init(s); - if (ret != 0) { - av_free(s->priv_data); - av_free(s); - return NULL; - } - } - s->fetch_timestamp=1; - s->pict_type = FF_I_TYPE; - return s; -} - -/** - * - * @param buf input - * @param buf_size input length, to signal EOF, this should be 0 (so that the last frame can be output) - * @param pts input presentation timestamp - * @param dts input decoding timestamp - * @param poutbuf will contain a pointer to the first byte of the output frame - * @param poutbuf_size will contain the length of the output frame - * @return the number of bytes of the input bitstream used - * - * Example: - * @code - * while(in_len){ - * len = av_parser_parse(myparser, AVCodecContext, &data, &size, - * in_data, in_len, - * pts, dts); - * in_data += len; - * in_len -= len; - * - * if(size) - * decode_frame(data, size); - * } - * @endcode - */ -int av_parser_parse(AVCodecParserContext *s, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size, - int64_t pts, int64_t dts) -{ - int index, i, k; - uint8_t dummy_buf[FF_INPUT_BUFFER_PADDING_SIZE]; - - 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 { - /* add a new packet descriptor */ - k = (s->cur_frame_start_index + 1) & (AV_PARSER_PTS_NB - 1); - s->cur_frame_start_index = k; - s->cur_frame_offset[k] = s->cur_offset; - s->cur_frame_pts[k] = pts; - s->cur_frame_dts[k] = dts; - - /* fill first PTS/DTS */ - if (s->fetch_timestamp){ - s->fetch_timestamp=0; - s->last_pts = pts; - s->last_dts = dts; - s->last_offset = 0; - s->cur_frame_pts[k] = - s->cur_frame_dts[k] = AV_NOPTS_VALUE; - } - } - - /* WARNING: the returned index can be negative */ - index = s->parser->parser_parse(s, avctx, (const uint8_t **)poutbuf, poutbuf_size, buf, buf_size); -//av_log(NULL, AV_LOG_DEBUG, "parser: in:%"PRId64", %"PRId64", out:%"PRId64", %"PRId64", in:%d out:%d id:%d\n", pts, dts, s->last_pts, s->last_dts, buf_size, *poutbuf_size, avctx->codec_id); - /* update the file pointer */ - if (*poutbuf_size) { - /* fill the data for the current frame */ - s->frame_offset = s->last_frame_offset; - s->pts = s->last_pts; - s->dts = s->last_dts; - s->offset = s->last_offset; - - /* offset of the next frame */ - s->last_frame_offset = s->cur_offset + index; - /* find the packet in which the new frame starts. It - is tricky because of MPEG video start codes - which can begin in one packet and finish in - another packet. In the worst case, an MPEG - video start code could be in 4 different - packets. */ - k = s->cur_frame_start_index; - for(i = 0; i < AV_PARSER_PTS_NB; i++) { - if (s->last_frame_offset >= s->cur_frame_offset[k]) - break; - k = (k - 1) & (AV_PARSER_PTS_NB - 1); - } - - s->last_pts = s->cur_frame_pts[k]; - s->last_dts = s->cur_frame_dts[k]; - s->last_offset = s->last_frame_offset - s->cur_frame_offset[k]; - - /* some parsers tell us the packet size even before seeing the first byte of the next packet, - so the next pts/dts is in the next chunk */ - if(index == buf_size){ - s->fetch_timestamp=1; - } - } - if (index < 0) - index = 0; - s->cur_offset += index; - return index; -} - -/** - * - * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed - * @deprecated use AVBitstreamFilter - */ -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 != I_TYPE && (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->parser->parser_close) - s->parser->parser_close(s); - av_free(s->priv_data); - av_free(s); -} - -/*****************************************************/ - -/** - * combines the (truncated) bitstream to a complete frame - * @returns -1 if no complete frame could be created - */ -int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size) -{ -#if 0 - if(pc->overread){ - printf("overread %d, state:%X next:%d index:%d o_index:%d\n", pc->overread, pc->state, next, pc->index, pc->overread_index); - printf("%X %X %X %X\n", (*buf)[0], (*buf)[1],(*buf)[2],(*buf)[3]); - } -#endif - - /* 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){ - pc->buffer= av_fast_realloc(pc->buffer, &pc->buffer_size, (*buf_size) + pc->index + FF_INPUT_BUFFER_PADDING_SIZE); - - 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){ - pc->buffer= av_fast_realloc(pc->buffer, &pc->buffer_size, next + pc->index + 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->overread++; - } - -#if 0 - if(pc->overread){ - printf("overread %d, state:%X next:%d index:%d o_index:%d\n", pc->overread, pc->state, next, pc->index, pc->overread_index); - printf("%X %X %X %X\n", (*buf)[0], (*buf)[1],(*buf)[2],(*buf)[3]); - } -#endif - - return 0; -} - -void ff_parse_close(AVCodecParserContext *s) -{ - ParseContext *pc = s->priv_data; - - av_free(pc->buffer); -} - -void ff_parse1_close(AVCodecParserContext *s) -{ - ParseContext1 *pc1 = s->priv_data; - - av_free(pc1->pc.buffer); - av_free(pc1->enc); -} - -/*************************/ - -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; -} |