X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fparser.c;h=03f327efd08d8283ced233de35d6a65058ec4d50;hb=5707af8d0b9c5a7e8a742a11798e406f99d78cea;hp=20f0031780da7b92d407663481136d79317c149e;hpb=1f96bafb27a1a201dc0bfd299bea7c0a2d8370dc;p=ffmpeg diff --git a/libavcodec/parser.c b/libavcodec/parser.c index 20f0031780d..03f327efd08 100644 --- a/libavcodec/parser.c +++ b/libavcodec/parser.c @@ -1,28 +1,31 @@ /* * Audio and Video frame extraction - * Copyright (c) 2003 Fabrice Bellard. - * Copyright (c) 2003 Michael Niedermayer. + * Copyright (c) 2003 Fabrice Bellard + * Copyright (c) 2003 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include + #include "parser.h" +#include "libavutil/mem.h" -AVCodecParser *av_first_parser = NULL; +static AVCodecParser *av_first_parser = NULL; AVCodecParser* av_parser_next(AVCodecParser *p){ if(p) return p->next; @@ -41,7 +44,7 @@ AVCodecParserContext *av_parser_init(int codec_id) AVCodecParser *parser; int ret; - if(codec_id == CODEC_ID_NONE) + if(codec_id == AV_CODEC_ID_NONE) return NULL; for(parser = av_first_parser; parser != NULL; parser = parser->next) { @@ -58,10 +61,12 @@ AVCodecParserContext *av_parser_init(int codec_id) 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->priv_data_size) { + 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); @@ -72,101 +77,89 @@ AVCodecParserContext *av_parser_init(int codec_id) } } s->fetch_timestamp=1; - s->pict_type = FF_I_TYPE; + s->pict_type = AV_PICTURE_TYPE_I; + 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; } -/** - * - * @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) +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 is disabled because mpeg-ts doesnt 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, k; + 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 { + } else if (s->cur_offset + buf_size != + s->cur_frame_end[s->cur_frame_start_index]) { /* skip remainder packets */ /* 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; - } + 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); -//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; + s->frame_offset = s->next_frame_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; - } + s->next_frame_offset = s->cur_offset + index; + s->fetch_timestamp=1; } if (index < 0) index = 0; @@ -197,7 +190,7 @@ int av_parser_change(AVCodecParserContext *s, *poutbuf_size= buf_size; if(avctx->extradata){ if( (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)) - /*||(s->pict_type != FF_I_TYPE && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_NOKEY))*/ + /*||(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; @@ -214,26 +207,27 @@ int av_parser_change(AVCodecParserContext *s, void av_parser_close(AVCodecParserContext *s) { - if (s->parser->parser_close) - s->parser->parser_close(s); - av_free(s->priv_data); - av_free(s); + if(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, AVERROR(ENOMEM) if there was a memory allocation error + * Combine the (truncated) bitstream to a complete frame. + * @return -1 if no complete frame could be created, AVERROR(ENOMEM) if there was a memory allocation error */ 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]); + 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]); } -#endif /* Copy overread bytes from last frame into buffer. */ for(; pc->overread>0; pc->overread--){ @@ -277,15 +271,15 @@ int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_s /* 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 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]); + 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]); } -#endif return 0; } @@ -294,15 +288,7 @@ 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); + av_freep(&pc->buffer); } /*************************/