X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fparser.c;h=355187ae45ba59daa066f6ae1771fb48f61a5c4c;hb=549d0bdca53af7a6e0c612ab4b03baecf3a5878f;hp=740ad855c4ffd283c25979d30f06b95a5ee267bc;hpb=832a7b631fbbca15741705a171e9da03e5d42824;p=ffmpeg diff --git a/libavcodec/parser.c b/libavcodec/parser.c index 740ad855c4f..355187ae45b 100644 --- a/libavcodec/parser.c +++ b/libavcodec/parser.c @@ -1,30 +1,43 @@ /* * 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 "avcodec.h" -#include "mpegvideo.h" -#include "mpegaudio.h" + +#include +#include + +#include "libavutil/internal.h" +#include "libavutil/mem.h" + +#include "internal.h" #include "parser.h" -AVCodecParser *av_first_parser = NULL; +static AVCodecParser *av_first_parser = NULL; + +AVCodecParser *av_parser_next(const AVCodecParser *p) +{ + if (p) + return p->next; + else + return av_first_parser; +} void av_register_codec_parser(AVCodecParser *parser) { @@ -38,10 +51,10 @@ 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) { + 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 || @@ -50,15 +63,18 @@ AVCodecParserContext *av_parser_init(int codec_id) goto found; } return NULL; - found: + +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->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); @@ -68,98 +84,94 @@ AVCodecParserContext *av_parser_init(int codec_id) return NULL; } } - s->fetch_timestamp=1; + s->fetch_timestamp = 1; + s->pict_type = AV_PICTURE_TYPE_I; + s->key_frame = -1; +#if FF_API_CONVERGENCE_DURATION +FF_DISABLE_DEPRECATION_WARNINGS + s->convergence_duration = 0; +FF_ENABLE_DEPRECATION_WARNINGS +#endif + s->dts_sync_point = INT_MIN; + s->dts_ref_dts_delta = INT_MIN; + s->pts_dts_delta = INT_MIN; + s->format = -1; + 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)) && + 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; - uint8_t dummy_buf[FF_INPUT_BUFFER_PADDING_SIZE]; + int index, i; + uint8_t dummy_buf[AV_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->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, 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); + 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->last_frame_offset; - s->pts = s->last_pts; - s->dts = s->last_dts; + 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]; - - /* 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; @@ -167,37 +179,34 @@ int av_parser_parse(AVCodecParserContext *s, 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, +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; + const uint8_t *buf, int buf_size, int keyframe) +{ + if (s && s->parser->split) { + if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER || + avctx->flags2 & AV_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); + *poutbuf = (uint8_t *) buf; + *poutbuf_size = buf_size; + if (avctx->extradata) { + if (keyframe && (avctx->flags2 & AV_CODEC_FLAG2_LOCAL_HEADER)) { + int size = buf_size + avctx->extradata_size; + + *poutbuf_size = size; + *poutbuf = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE); + if (!*poutbuf) + return AVERROR(ENOMEM); memcpy(*poutbuf, avctx->extradata, avctx->extradata_size); - memcpy((*poutbuf) + avctx->extradata_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE); + memcpy(*poutbuf + avctx->extradata_size, buf, + buf_size + AV_INPUT_BUFFER_PADDING_SIZE); return 1; } } @@ -207,72 +216,80 @@ 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 - */ -int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size) +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]); + if (pc->overread) { + ff_dlog(NULL, "overread %d, state:%X next:%d index:%d o_index:%d\n", + pc->overread, pc->state, next, pc->index, pc->overread_index); + ff_dlog(NULL, "%X %X %X %X\n", + (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]); } -#endif - /* copy overreaded bytes from last frame into buffer */ - for(; pc->overread>0; pc->overread--){ - pc->buffer[pc->index++]= pc->buffer[pc->overread_index++]; - } + /* 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; - } + if (!*buf_size && next == END_NOT_FOUND) + next = 0; - pc->last_index= pc->index; + 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); - + if (next == END_NOT_FOUND) { + void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size, + *buf_size + pc->index + + AV_INPUT_BUFFER_PADDING_SIZE); + + if (!new_buffer) + 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; + *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 ); + if (pc->index) { + void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size, + next + pc->index + + AV_INPUT_BUFFER_PADDING_SIZE); + + if (!new_buffer) + return AVERROR(ENOMEM); + pc->buffer = new_buffer; + if (next > -AV_INPUT_BUFFER_PADDING_SIZE) + memcpy(&pc->buffer[pc->index], *buf, + next + AV_INPUT_BUFFER_PADDING_SIZE); pc->index = 0; - *buf= pc->buffer; + *buf = pc->buffer; } /* store overread bytes */ - for(;next < 0; next++){ - pc->state = (pc->state<<8) | pc->buffer[pc->last_index + next]; + 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]); + if (pc->overread) { + ff_dlog(NULL, "overread %d, state:%X next:%d index:%d o_index:%d\n", + pc->overread, pc->state, next, pc->index, pc->overread_index); + ff_dlog(NULL, "%X %X %X %X\n", + (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]); } -#endif return 0; } @@ -281,581 +298,18 @@ 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); -} - -/*************************/ - -#ifdef CONFIG_MPEG4VIDEO_PARSER -/* used by parser */ -/* XXX: make it use less memory */ -static int av_mpeg4_decode_header(AVCodecParserContext *s1, - AVCodecContext *avctx, - const uint8_t *buf, int buf_size) -{ - ParseContext1 *pc = s1->priv_data; - MpegEncContext *s = pc->enc; - GetBitContext gb1, *gb = &gb1; - int ret; - - s->avctx = avctx; - s->current_picture_ptr = &s->current_picture; - - if (avctx->extradata_size && pc->first_picture){ - init_get_bits(gb, avctx->extradata, avctx->extradata_size*8); - ret = ff_mpeg4_decode_picture_header(s, gb); - } - - init_get_bits(gb, buf, 8 * buf_size); - ret = ff_mpeg4_decode_picture_header(s, gb); - if (s->width) { - avcodec_set_dimensions(avctx, s->width, s->height); - } - s1->pict_type= s->pict_type; - pc->first_picture = 0; - return ret; -} - -static int mpeg4video_parse_init(AVCodecParserContext *s) -{ - ParseContext1 *pc = s->priv_data; - - pc->enc = av_mallocz(sizeof(MpegEncContext)); - if (!pc->enc) - return -1; - pc->first_picture = 1; - return 0; -} - -static int mpeg4video_parse(AVCodecParserContext *s, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size) -{ - ParseContext *pc = s->priv_data; - int next; - - if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){ - next= buf_size; - }else{ - next= ff_mpeg4_find_frame_end(pc, buf, buf_size); - - if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) { - *poutbuf = NULL; - *poutbuf_size = 0; - return buf_size; - } - } - av_mpeg4_decode_header(s, avctx, buf, buf_size); - - *poutbuf = (uint8_t *)buf; - *poutbuf_size = buf_size; - return next; + av_freep(&pc->buffer); } -#endif -int ff_mpeg4video_split(AVCodecContext *avctx, - const uint8_t *buf, int buf_size) +int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size) { int i; - uint32_t state= -1; + uint32_t state = -1; - for(i=0; ipriv_data; - s->inbuf_ptr = s->inbuf; - return 0; -} - -static int mpegaudio_parse(AVCodecParserContext *s1, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size) -{ - MpegAudioParseContext *s = s1->priv_data; - int len, ret, sr; - uint32_t header; - const uint8_t *buf_ptr; - - *poutbuf = NULL; - *poutbuf_size = 0; - buf_ptr = buf; - while (buf_size > 0) { - len = s->inbuf_ptr - s->inbuf; - if (s->frame_size == 0) { - /* special case for next header for first frame in free - format case (XXX: find a simpler method) */ - if (s->free_format_next_header != 0) { - s->inbuf[0] = s->free_format_next_header >> 24; - s->inbuf[1] = s->free_format_next_header >> 16; - s->inbuf[2] = s->free_format_next_header >> 8; - s->inbuf[3] = s->free_format_next_header; - s->inbuf_ptr = s->inbuf + 4; - s->free_format_next_header = 0; - goto got_header; - } - /* no header seen : find one. We need at least MPA_HEADER_SIZE - bytes to parse it */ - len = FFMIN(MPA_HEADER_SIZE - len, buf_size); - if (len > 0) { - memcpy(s->inbuf_ptr, buf_ptr, len); - buf_ptr += len; - buf_size -= len; - s->inbuf_ptr += len; - } - if ((s->inbuf_ptr - s->inbuf) >= MPA_HEADER_SIZE) { - got_header: - header = (s->inbuf[0] << 24) | (s->inbuf[1] << 16) | - (s->inbuf[2] << 8) | s->inbuf[3]; - - ret = mpa_decode_header(avctx, header, &sr); - if (ret < 0) { - s->header_count= -2; - /* no sync found : move by one byte (inefficient, but simple!) */ - memmove(s->inbuf, s->inbuf + 1, s->inbuf_ptr - s->inbuf - 1); - s->inbuf_ptr--; - dprintf("skip %x\n", header); - /* reset free format frame size to give a chance - to get a new bitrate */ - s->free_format_frame_size = 0; - } else { - if((header&SAME_HEADER_MASK) != (s->header&SAME_HEADER_MASK) && s->header) - s->header_count= -3; - s->header= header; - s->header_count++; - s->frame_size = ret; - -#if 0 - /* free format: prepare to compute frame size */ - if (decode_header(s, header) == 1) { - s->frame_size = -1; - } -#endif - } - if(s->header_count > 1) - avctx->sample_rate= sr; - } - } else -#if 0 - if (s->frame_size == -1) { - /* free format : find next sync to compute frame size */ - len = MPA_MAX_CODED_FRAME_SIZE - len; - if (len > buf_size) - len = buf_size; - if (len == 0) { - /* frame too long: resync */ - s->frame_size = 0; - memmove(s->inbuf, s->inbuf + 1, s->inbuf_ptr - s->inbuf - 1); - s->inbuf_ptr--; - } else { - uint8_t *p, *pend; - uint32_t header1; - int padding; - - memcpy(s->inbuf_ptr, buf_ptr, len); - /* check for header */ - p = s->inbuf_ptr - 3; - pend = s->inbuf_ptr + len - 4; - while (p <= pend) { - header = (p[0] << 24) | (p[1] << 16) | - (p[2] << 8) | p[3]; - header1 = (s->inbuf[0] << 24) | (s->inbuf[1] << 16) | - (s->inbuf[2] << 8) | s->inbuf[3]; - /* check with high probability that we have a - valid header */ - if ((header & SAME_HEADER_MASK) == - (header1 & SAME_HEADER_MASK)) { - /* header found: update pointers */ - len = (p + 4) - s->inbuf_ptr; - buf_ptr += len; - buf_size -= len; - s->inbuf_ptr = p; - /* compute frame size */ - s->free_format_next_header = header; - s->free_format_frame_size = s->inbuf_ptr - s->inbuf; - padding = (header1 >> 9) & 1; - if (s->layer == 1) - s->free_format_frame_size -= padding * 4; - else - s->free_format_frame_size -= padding; - dprintf("free frame size=%d padding=%d\n", - s->free_format_frame_size, padding); - decode_header(s, header1); - goto next_data; - } - p++; - } - /* not found: simply increase pointers */ - buf_ptr += len; - s->inbuf_ptr += len; - buf_size -= len; - } - } else -#endif - if (len < s->frame_size) { - if (s->frame_size > MPA_MAX_CODED_FRAME_SIZE) - s->frame_size = MPA_MAX_CODED_FRAME_SIZE; - len = FFMIN(s->frame_size - len, buf_size); - memcpy(s->inbuf_ptr, buf_ptr, len); - buf_ptr += len; - s->inbuf_ptr += len; - buf_size -= len; - } - - if(s->frame_size > 0 && buf_ptr - buf == s->inbuf_ptr - s->inbuf - && buf_size + buf_ptr - buf >= s->frame_size){ - if(s->header_count > 0){ - *poutbuf = buf; - *poutbuf_size = s->frame_size; - } - buf_ptr = buf + s->frame_size; - s->inbuf_ptr = s->inbuf; - s->frame_size = 0; - break; - } - - // next_data: - if (s->frame_size > 0 && - (s->inbuf_ptr - s->inbuf) >= s->frame_size) { - if(s->header_count > 0){ - *poutbuf = s->inbuf; - *poutbuf_size = s->inbuf_ptr - s->inbuf; - } - s->inbuf_ptr = s->inbuf; - s->frame_size = 0; - break; - } - } - return buf_ptr - buf; -} -#endif /* CONFIG_MPEGAUDIO_PARSER */ - -#if defined(CONFIG_AC3_PARSER) || defined(CONFIG_AAC_PARSER) -/* also used for ADTS AAC */ -typedef struct AC3ParseContext { - uint8_t *inbuf_ptr; - int frame_size; - int header_size; - int (*sync)(const uint8_t *buf, int *channels, int *sample_rate, - int *bit_rate, int *samples); - uint8_t inbuf[8192]; /* input buffer */ -} AC3ParseContext; - -#define AC3_HEADER_SIZE 7 -#define AAC_HEADER_SIZE 7 - -#ifdef CONFIG_AC3_PARSER -static const int ac3_sample_rates[4] = { - 48000, 44100, 32000, 0 -}; - -static const int ac3_frame_sizes[64][3] = { - { 64, 69, 96 }, - { 64, 70, 96 }, - { 80, 87, 120 }, - { 80, 88, 120 }, - { 96, 104, 144 }, - { 96, 105, 144 }, - { 112, 121, 168 }, - { 112, 122, 168 }, - { 128, 139, 192 }, - { 128, 140, 192 }, - { 160, 174, 240 }, - { 160, 175, 240 }, - { 192, 208, 288 }, - { 192, 209, 288 }, - { 224, 243, 336 }, - { 224, 244, 336 }, - { 256, 278, 384 }, - { 256, 279, 384 }, - { 320, 348, 480 }, - { 320, 349, 480 }, - { 384, 417, 576 }, - { 384, 418, 576 }, - { 448, 487, 672 }, - { 448, 488, 672 }, - { 512, 557, 768 }, - { 512, 558, 768 }, - { 640, 696, 960 }, - { 640, 697, 960 }, - { 768, 835, 1152 }, - { 768, 836, 1152 }, - { 896, 975, 1344 }, - { 896, 976, 1344 }, - { 1024, 1114, 1536 }, - { 1024, 1115, 1536 }, - { 1152, 1253, 1728 }, - { 1152, 1254, 1728 }, - { 1280, 1393, 1920 }, - { 1280, 1394, 1920 }, -}; - -static const int ac3_bitrates[64] = { - 32, 32, 40, 40, 48, 48, 56, 56, 64, 64, 80, 80, 96, 96, 112, 112, - 128, 128, 160, 160, 192, 192, 224, 224, 256, 256, 320, 320, 384, - 384, 448, 448, 512, 512, 576, 576, 640, 640, -}; - -static const int ac3_channels[8] = { - 2, 1, 2, 3, 3, 4, 4, 5 -}; -#endif /* CONFIG_AC3_PARSER */ - -#ifdef CONFIG_AAC_PARSER -static const int aac_sample_rates[16] = { - 96000, 88200, 64000, 48000, 44100, 32000, - 24000, 22050, 16000, 12000, 11025, 8000, 7350 -}; - -static const int aac_channels[8] = { - 0, 1, 2, 3, 4, 5, 6, 8 -}; -#endif - -#ifdef CONFIG_AC3_PARSER -static int ac3_sync(const uint8_t *buf, int *channels, int *sample_rate, - int *bit_rate, int *samples) -{ - unsigned int fscod, frmsizecod, acmod, bsid, lfeon; - GetBitContext bits; - - init_get_bits(&bits, buf, AC3_HEADER_SIZE * 8); - - if(get_bits(&bits, 16) != 0x0b77) - return 0; - - skip_bits(&bits, 16); /* crc */ - fscod = get_bits(&bits, 2); - frmsizecod = get_bits(&bits, 6); - - if(!ac3_sample_rates[fscod]) - return 0; - - bsid = get_bits(&bits, 5); - if(bsid > 8) - return 0; - skip_bits(&bits, 3); /* bsmod */ - acmod = get_bits(&bits, 3); - if(acmod & 1 && acmod != 1) - skip_bits(&bits, 2); /* cmixlev */ - if(acmod & 4) - skip_bits(&bits, 2); /* surmixlev */ - if(acmod & 2) - skip_bits(&bits, 2); /* dsurmod */ - lfeon = get_bits1(&bits); - - *sample_rate = ac3_sample_rates[fscod]; - *bit_rate = ac3_bitrates[frmsizecod] * 1000; - *channels = ac3_channels[acmod] + lfeon; - *samples = 6 * 256; - - return ac3_frame_sizes[frmsizecod][fscod] * 2; -} -#endif /* CONFIG_AC3_PARSER */ - -#ifdef CONFIG_AAC_PARSER -static int aac_sync(const uint8_t *buf, int *channels, int *sample_rate, - int *bit_rate, int *samples) -{ - GetBitContext bits; - int size, rdb, ch, sr; - - init_get_bits(&bits, buf, AAC_HEADER_SIZE * 8); - - if(get_bits(&bits, 12) != 0xfff) - return 0; - - skip_bits1(&bits); /* id */ - skip_bits(&bits, 2); /* layer */ - skip_bits1(&bits); /* protection_absent */ - skip_bits(&bits, 2); /* profile_objecttype */ - sr = get_bits(&bits, 4); /* sample_frequency_index */ - if(!aac_sample_rates[sr]) - return 0; - skip_bits1(&bits); /* private_bit */ - ch = get_bits(&bits, 3); /* channel_configuration */ - if(!aac_channels[ch]) - return 0; - skip_bits1(&bits); /* original/copy */ - skip_bits1(&bits); /* home */ - - /* adts_variable_header */ - skip_bits1(&bits); /* copyright_identification_bit */ - skip_bits1(&bits); /* copyright_identification_start */ - size = get_bits(&bits, 13); /* aac_frame_length */ - skip_bits(&bits, 11); /* adts_buffer_fullness */ - rdb = get_bits(&bits, 2); /* number_of_raw_data_blocks_in_frame */ - - *channels = aac_channels[ch]; - *sample_rate = aac_sample_rates[sr]; - *samples = (rdb + 1) * 1024; - *bit_rate = size * 8 * *sample_rate / *samples; - - return size; -} -#endif /* CONFIG_AAC_PARSER */ - -#ifdef CONFIG_AC3_PARSER -static int ac3_parse_init(AVCodecParserContext *s1) -{ - AC3ParseContext *s = s1->priv_data; - s->inbuf_ptr = s->inbuf; - s->header_size = AC3_HEADER_SIZE; - s->sync = ac3_sync; - return 0; -} -#endif - -#ifdef CONFIG_AAC_PARSER -static int aac_parse_init(AVCodecParserContext *s1) -{ - AC3ParseContext *s = s1->priv_data; - s->inbuf_ptr = s->inbuf; - s->header_size = AAC_HEADER_SIZE; - s->sync = aac_sync; - return 0; -} -#endif - -/* also used for ADTS AAC */ -static int ac3_parse(AVCodecParserContext *s1, - AVCodecContext *avctx, - uint8_t **poutbuf, int *poutbuf_size, - const uint8_t *buf, int buf_size) -{ - AC3ParseContext *s = s1->priv_data; - const uint8_t *buf_ptr; - int len, sample_rate, bit_rate, channels, samples; - - *poutbuf = NULL; - *poutbuf_size = 0; - - buf_ptr = buf; - while (buf_size > 0) { - len = s->inbuf_ptr - s->inbuf; - if (s->frame_size == 0) { - /* no header seen : find one. We need at least s->header_size - bytes to parse it */ - len = FFMIN(s->header_size - len, buf_size); - - memcpy(s->inbuf_ptr, buf_ptr, len); - buf_ptr += len; - s->inbuf_ptr += len; - buf_size -= len; - if ((s->inbuf_ptr - s->inbuf) == s->header_size) { - len = s->sync(s->inbuf, &channels, &sample_rate, &bit_rate, - &samples); - if (len == 0) { - /* no sync found : move by one byte (inefficient, but simple!) */ - memmove(s->inbuf, s->inbuf + 1, s->header_size - 1); - s->inbuf_ptr--; - } else { - s->frame_size = len; - /* update codec info */ - avctx->sample_rate = sample_rate; - /* set channels,except if the user explicitly requests 1 or 2 channels, XXX/FIXME this is a bit ugly */ - if(avctx->codec_id == CODEC_ID_AC3){ - if(avctx->channels!=1 && avctx->channels!=2){ - avctx->channels = channels; - } - } else { - avctx->channels = channels; - } - avctx->bit_rate = bit_rate; - avctx->frame_size = samples; - } - } - } else { - len = FFMIN(s->frame_size - len, buf_size); - - memcpy(s->inbuf_ptr, buf_ptr, len); - buf_ptr += len; - s->inbuf_ptr += len; - buf_size -= len; - - if(s->inbuf_ptr - s->inbuf == s->frame_size){ - *poutbuf = s->inbuf; - *poutbuf_size = s->frame_size; - s->inbuf_ptr = s->inbuf; - s->frame_size = 0; - break; - } - } - } - return buf_ptr - buf; -} -#endif /* CONFIG_AC3_PARSER || CONFIG_AAC_PARSER */ - -#ifdef CONFIG_MPEG4VIDEO_PARSER -AVCodecParser mpeg4video_parser = { - { CODEC_ID_MPEG4 }, - sizeof(ParseContext1), - mpeg4video_parse_init, - mpeg4video_parse, - ff_parse1_close, - ff_mpeg4video_split, -}; -#endif -#ifdef CONFIG_MPEGAUDIO_PARSER -AVCodecParser mpegaudio_parser = { - { CODEC_ID_MP2, CODEC_ID_MP3 }, - sizeof(MpegAudioParseContext), - mpegaudio_parse_init, - mpegaudio_parse, - NULL, -}; -#endif -#ifdef CONFIG_AC3_PARSER -AVCodecParser ac3_parser = { - { CODEC_ID_AC3 }, - sizeof(AC3ParseContext), - ac3_parse_init, - ac3_parse, - NULL, -}; -#endif -#ifdef CONFIG_AAC_PARSER -AVCodecParser aac_parser = { - { CODEC_ID_AAC }, - sizeof(AC3ParseContext), - aac_parse_init, - ac3_parse, - NULL, -}; -#endif