diff options
Diffstat (limited to 'libavformat/flvdec.c')
-rw-r--r-- | libavformat/flvdec.c | 649 |
1 files changed, 467 insertions, 182 deletions
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c index 1b29740..0217cef 100644 --- a/libavformat/flvdec.c +++ b/libavformat/flvdec.c @@ -1,26 +1,26 @@ /* * FLV demuxer - * Copyright (c) 2003 The Libav Project + * Copyright (c) 2003 The FFmpeg Project * * This demuxer will generate a 1 byte extradata for VP6F content. * It is composed of: * - upper 4 bits: difference between encoded width and visible width * - lower 4 bits: difference between encoded height and visible height * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -37,18 +37,16 @@ #include "avio_internal.h" #include "flv.h" -#define KEYFRAMES_TAG "keyframes" -#define KEYFRAMES_TIMESTAMP_TAG "times" -#define KEYFRAMES_BYTEOFFSET_TAG "filepositions" - #define VALIDATE_INDEX_TS_THRESH 2500 +#define RESYNC_BUFFER_SIZE (1<<20) + typedef struct FLVContext { const AVClass *class; ///< Class for private options. int trust_metadata; ///< configure streams according onMetaData int wrong_dts; ///< wrong dts due to negative cts - uint8_t *new_extradata[2]; - int new_extradata_size[2]; + uint8_t *new_extradata[FLV_STREAM_TYPE_NB]; + int new_extradata_size[FLV_STREAM_TYPE_NB]; int last_sample_rate; int last_channels; struct { @@ -58,35 +56,107 @@ typedef struct FLVContext { int validate_next; int validate_count; int searched_for_end; + + uint8_t resync_buffer[2*RESYNC_BUFFER_SIZE]; + + int broken_sizes; + int sum_flv_tag_size; + + int last_keyframe_stream_index; + int keyframe_count; + int64_t video_bit_rate; + int64_t audio_bit_rate; + int64_t *keyframe_times; + int64_t *keyframe_filepositions; + int missing_streams; AVRational framerate; } FLVContext; -static int flv_probe(AVProbeData *p) +static int probe(AVProbeData *p, int live) { - const uint8_t *d; + const uint8_t *d = p->buf; + unsigned offset = AV_RB32(d + 5); - d = p->buf; if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5] == 0 && - AV_RB32(d + 5) > 8) { - return AVPROBE_SCORE_MAX; + offset + 100 < p->buf_size && + offset > 8) { + int is_live = !memcmp(d + offset + 40, "NGINX RTMP", 10); + + if (live == is_live) + return AVPROBE_SCORE_MAX; } return 0; } +static int flv_probe(AVProbeData *p) +{ + return probe(p, 0); +} + +static int live_flv_probe(AVProbeData *p) +{ + return probe(p, 1); +} + +static void add_keyframes_index(AVFormatContext *s) +{ + FLVContext *flv = s->priv_data; + AVStream *stream = NULL; + unsigned int i = 0; + + if (flv->last_keyframe_stream_index < 0) { + av_log(s, AV_LOG_DEBUG, "keyframe stream hasn't been created\n"); + return; + } + + av_assert0(flv->last_keyframe_stream_index <= s->nb_streams); + stream = s->streams[flv->last_keyframe_stream_index]; + + if (stream->nb_index_entries == 0) { + for (i = 0; i < flv->keyframe_count; i++) { + av_log(s, AV_LOG_TRACE, "keyframe filepositions = %"PRId64" times = %"PRId64"\n", + flv->keyframe_filepositions[i], flv->keyframe_times[i] * 1000); + av_add_index_entry(stream, flv->keyframe_filepositions[i], + flv->keyframe_times[i] * 1000, 0, 0, AVINDEX_KEYFRAME); + } + } else + av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n"); + + if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { + av_freep(&flv->keyframe_times); + av_freep(&flv->keyframe_filepositions); + flv->keyframe_count = 0; + } +} + static AVStream *create_stream(AVFormatContext *s, int codec_type) { - FLVContext *flv = s->priv_data; + FLVContext *flv = s->priv_data; AVStream *st = avformat_new_stream(s, NULL); if (!st) return NULL; st->codecpar->codec_type = codec_type; - if (codec_type == AVMEDIA_TYPE_VIDEO) + if (s->nb_streams>=3 ||( s->nb_streams==2 + && s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE + && s->streams[1]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)) + s->ctx_flags &= ~AVFMTCTX_NOHEADER; + if (codec_type == AVMEDIA_TYPE_AUDIO) { + st->codecpar->bit_rate = flv->audio_bit_rate; + flv->missing_streams &= ~FLV_HEADER_FLAG_HASAUDIO; + } + if (codec_type == AVMEDIA_TYPE_VIDEO) { + st->codecpar->bit_rate = flv->video_bit_rate; + flv->missing_streams &= ~FLV_HEADER_FLAG_HASVIDEO; st->avg_frame_rate = flv->framerate; + } + avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ + flv->last_keyframe_stream_index = s->nb_streams - 1; + add_keyframes_index(s); return st; } @@ -195,7 +265,7 @@ static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, apar->codec_id = AV_CODEC_ID_PCM_ALAW; break; default: - av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", + avpriv_request_sample(s, "Audio codec (%x)", flv_codecid >> FLV_AUDIO_CODECID_OFFSET); apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET; } @@ -229,11 +299,16 @@ static int flv_same_video_codec(AVCodecParameters *vpar, int flags) static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read) { + int ret = 0; AVCodecParameters *par = vstream->codecpar; + enum AVCodecID old_codec_id = vstream->codecpar->codec_id; switch (flv_codecid) { case FLV_CODECID_H263: par->codec_id = AV_CODEC_ID_FLV1; break; + case FLV_CODECID_REALH263: + par->codec_id = AV_CODEC_ID_H263; + break; // Really mean it this time case FLV_CODECID_SCREEN: par->codec_id = AV_CODEC_ID_FLASHSV; break; @@ -247,25 +322,35 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, par->codec_id = AV_CODEC_ID_VP6A; if (read) { if (par->extradata_size != 1) { - par->extradata = av_malloc(1); - if (par->extradata) - par->extradata_size = 1; + ff_alloc_extradata(par, 1); } if (par->extradata) par->extradata[0] = avio_r8(s->pb); else avio_skip(s->pb, 1); } - return 1; // 1 byte body size adjustment for flv_read_packet() + ret = 1; // 1 byte body size adjustment for flv_read_packet() + break; case FLV_CODECID_H264: par->codec_id = AV_CODEC_ID_H264; - return 3; // not 4, reading packet type will consume one byte + vstream->need_parsing = AVSTREAM_PARSE_HEADERS; + ret = 3; // not 4, reading packet type will consume one byte + break; + case FLV_CODECID_MPEG4: + par->codec_id = AV_CODEC_ID_MPEG4; + ret = 3; + break; default: - av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid); + avpriv_request_sample(s, "Video codec (%x)", flv_codecid); par->codec_tag = flv_codecid; } - return 0; + if (!vstream->internal->need_context_update && par->codec_id != old_codec_id) { + avpriv_request_sample(s, "Changing the codec id midstream"); + return AVERROR_PATCHWELCOME; + } + + return ret; } static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) @@ -283,60 +368,60 @@ static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) return length; } -static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, - AVStream *vstream, int64_t max_pos) +static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos) { FLVContext *flv = s->priv_data; - unsigned int arraylen = 0, timeslen = 0, fileposlen = 0, i; - double num_val; + unsigned int timeslen = 0, fileposlen = 0, i; char str_val[256]; int64_t *times = NULL; int64_t *filepositions = NULL; int ret = AVERROR(ENOSYS); int64_t initial_pos = avio_tell(ioc); + if (flv->keyframe_count > 0) { + av_log(s, AV_LOG_DEBUG, "keyframes have been paresed\n"); + return 0; + } + av_assert0(!flv->keyframe_times); + av_assert0(!flv->keyframe_filepositions); + if (s->flags & AVFMT_FLAG_IGNIDX) return 0; while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) { - int64_t *current_array; + int64_t **current_array; + unsigned int arraylen; // Expect array object in context if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY) break; arraylen = avio_rb32(ioc); - if (arraylen >> 28) + if (arraylen>>28) break; - /* Expect only 'times' or 'filepositions' sub-arrays in other - * case refuse to use such metadata for indexing. */ - if (!strcmp(KEYFRAMES_TIMESTAMP_TAG, str_val) && !times) { - if (!(times = av_mallocz(sizeof(*times) * arraylen))) { - ret = AVERROR(ENOMEM); - goto finish; - } + if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) { + current_array = × timeslen = arraylen; - current_array = times; } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions) { - if (!(filepositions = av_mallocz(sizeof(*filepositions) * arraylen))) { - ret = AVERROR(ENOMEM); - goto finish; - } + current_array = &filepositions; fileposlen = arraylen; - current_array = filepositions; } else // unexpected metatag inside keyframes, will not use such // metadata for indexing break; + if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) { + ret = AVERROR(ENOMEM); + goto finish; + } + for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) { if (avio_r8(ioc) != AMF_DATA_TYPE_NUMBER) - goto finish; - num_val = av_int2double(avio_rb64(ioc)); - current_array[i] = num_val; + goto invalid; + current_array[0][i] = av_int2double(avio_rb64(ioc)); } if (times && filepositions) { // All done, exiting at a position allowing amf_parse_object @@ -346,26 +431,26 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, } } - if (!ret && timeslen == fileposlen) { - for (i = 0; i < fileposlen; i++) { - av_add_index_entry(vstream, filepositions[i], times[i] * 1000, - 0, 0, AVINDEX_KEYFRAME); - if (i < 2) { - flv->validate_index[i].pos = filepositions[i]; - flv->validate_index[i].dts = times[i] * 1000; - flv->validate_count = i + 1; - } + if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) { + for (i = 0; i < FFMIN(2,fileposlen); i++) { + flv->validate_index[i].pos = filepositions[i]; + flv->validate_index[i].dts = times[i] * 1000; + flv->validate_count = i + 1; } - } else + flv->keyframe_times = times; + flv->keyframe_filepositions = filepositions; + flv->keyframe_count = timeslen; + times = NULL; + filepositions = NULL; + } else { +invalid: av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n"); + } finish: av_freep(×); av_freep(&filepositions); - // If we got unexpected data, but successfully reset back to - // the start pos, the caller can continue parsing - if (ret < 0 && avio_seek(ioc, initial_pos, SEEK_SET) > 0) - return 0; + avio_seek(ioc, initial_pos, SEEK_SET); return ret; } @@ -377,7 +462,7 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, FLVContext *flv = s->priv_data; AVIOContext *ioc; AMFDataType amf_type; - char str_val[256]; + char str_val[1024]; double num_val; num_val = 0; @@ -392,29 +477,37 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, num_val = avio_r8(ioc); break; case AMF_DATA_TYPE_STRING: - if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) + if (amf_get_string(ioc, str_val, sizeof(str_val)) < 0) { + av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n"); return -1; + } break; case AMF_DATA_TYPE_OBJECT: - if ((vstream || astream) && key && + if (key && + (ioc->seekable & AVIO_SEEKABLE_NORMAL) && !strcmp(KEYFRAMES_TAG, key) && depth == 1) - if (parse_keyframes_index(s, ioc, vstream ? vstream : astream, + if (parse_keyframes_index(s, ioc, max_pos) < 0) - return -1; - + av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n"); + else + add_keyframes_index(s); while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) if (amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0) return -1; // if we couldn't skip, bomb out. - if (avio_r8(ioc) != AMF_END_OF_OBJECT) + if (avio_r8(ioc) != AMF_END_OF_OBJECT) { + av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n"); return -1; + } break; case AMF_DATA_TYPE_NULL: case AMF_DATA_TYPE_UNDEFINED: case AMF_DATA_TYPE_UNSUPPORTED: break; // these take up no additional space case AMF_DATA_TYPE_MIXEDARRAY: + { + unsigned v; avio_skip(ioc, 4); // skip 32-bit max array index while (avio_tell(ioc) < max_pos - 2 && amf_get_string(ioc, str_val, sizeof(str_val)) > 0) @@ -423,9 +516,13 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, if (amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0) return -1; - if (avio_r8(ioc) != AMF_END_OF_OBJECT) + v = avio_r8(ioc); + if (v != AMF_END_OF_OBJECT) { + av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v); return -1; + } break; + } case AMF_DATA_TYPE_ARRAY: { unsigned int arraylen, i; @@ -441,27 +538,28 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, avio_skip(ioc, 8 + 2); // timestamp (double) and UTC offset (int16) break; default: // unsupported type, we couldn't skip + av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type); return -1; } if (key) { + apar = astream ? astream->codecpar : NULL; + vpar = vstream ? vstream->codecpar : NULL; + // stream info doesn't live any deeper than the first object if (depth == 1) { - apar = astream ? astream->codecpar : NULL; - vpar = vstream ? vstream->codecpar : NULL; - if (amf_type == AMF_DATA_TYPE_NUMBER || amf_type == AMF_DATA_TYPE_BOOL) { if (!strcmp(key, "duration")) s->duration = num_val * AV_TIME_BASE; - else if (!strcmp(key, "videodatarate") && vpar && + else if (!strcmp(key, "videodatarate") && 0 <= (int)(num_val * 1024.0)) - vpar->bit_rate = num_val * 1024.0; - else if (!strcmp(key, "audiodatarate") && apar && + flv->video_bit_rate = num_val * 1024.0; + else if (!strcmp(key, "audiodatarate") && 0 <= (int)(num_val * 1024.0)) - apar->bit_rate = num_val * 1024.0; + flv->audio_bit_rate = num_val * 1024.0; else if (!strcmp(key, "datastream")) { - AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA); + AVStream *st = create_stream(s, AVMEDIA_TYPE_SUBTITLE); if (!st) return AVERROR(ENOMEM); st->codecpar->codec_id = AV_CODEC_ID_TEXT; @@ -471,7 +569,9 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, vstream->avg_frame_rate = flv->framerate; } else if (flv->trust_metadata) { if (!strcmp(key, "videocodecid") && vpar) { - flv_set_video_codec(s, vstream, num_val, 0); + int ret = flv_set_video_codec(s, vstream, num_val, 0); + if (ret < 0) + return ret; } else if (!strcmp(key, "audiocodecid") && apar) { int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET; flv_set_audio_codec(s, astream, apar, id); @@ -491,8 +591,24 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, } } } + if (amf_type == AMF_DATA_TYPE_STRING) { + if (!strcmp(key, "encoder")) { + int version = -1; + if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) { + if (version > 0 && version <= 655) + flv->broken_sizes = 1; + } + } else if (!strcmp(key, "metadatacreator") && !strcmp(str_val, "MEGA")) { + flv->broken_sizes = 1; + } + } } + if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 && + ((!apar && !strcmp(key, "audiocodecid")) || + (!vpar && !strcmp(key, "videocodecid")))) + s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object + if (!strcmp(key, "duration") || !strcmp(key, "filesize") || !strcmp(key, "width") || @@ -523,40 +639,62 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, return 0; } +#define TYPE_ONTEXTDATA 1 +#define TYPE_ONCAPTION 2 +#define TYPE_ONCAPTIONINFO 3 +#define TYPE_UNKNOWN 9 + static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) { + FLVContext *flv = s->priv_data; AMFDataType type; AVStream *stream, *astream, *vstream; + AVStream av_unused *dstream; AVIOContext *ioc; int i; // only needs to hold the string "onMetaData". // Anything longer is something we don't want. - char buffer[11]; + char buffer[32]; astream = NULL; vstream = NULL; + dstream = NULL; ioc = s->pb; // first object needs to be "onMetaData" string type = avio_r8(ioc); if (type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0) - return -1; + return TYPE_UNKNOWN; if (!strcmp(buffer, "onTextData")) - return 1; + return TYPE_ONTEXTDATA; - if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) - return -1; + if (!strcmp(buffer, "onCaption")) + return TYPE_ONCAPTION; + + if (!strcmp(buffer, "onCaptionInfo")) + return TYPE_ONCAPTIONINFO; + + if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) { + av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer); + return TYPE_UNKNOWN; + } // find the streams now so that amf_parse_object doesn't need to do // the lookup every time it is called. for (i = 0; i < s->nb_streams; i++) { stream = s->streams[i]; - if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) - astream = stream; - else if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) + if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { vstream = stream; + flv->last_keyframe_stream_index = i; + } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { + astream = stream; + if (flv->last_keyframe_stream_index == -1) + flv->last_keyframe_stream_index = i; + } + else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) + dstream = stream; } // parse the second object (we want a mixed array) @@ -568,38 +706,55 @@ static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) static int flv_read_header(AVFormatContext *s) { + int flags; + FLVContext *flv = s->priv_data; int offset; + int pre_tag_size = 0; avio_skip(s->pb, 4); - avio_r8(s->pb); // flags + flags = avio_r8(s->pb); + + flv->missing_streams = flags & (FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO); s->ctx_flags |= AVFMTCTX_NOHEADER; offset = avio_rb32(s->pb); avio_seek(s->pb, offset, SEEK_SET); - avio_skip(s->pb, 4); + + /* Annex E. The FLV File Format + * E.3 TheFLVFileBody + * Field Type Comment + * PreviousTagSize0 UI32 Always 0 + * */ + pre_tag_size = avio_rb32(s->pb); + if (pre_tag_size) { + av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard flv format, first PreviousTagSize0 always is 0\n"); + } s->start_time = 0; + flv->sum_flv_tag_size = 0; + flv->last_keyframe_stream_index = -1; return 0; } static int flv_read_close(AVFormatContext *s) { + int i; FLVContext *flv = s->priv_data; - av_freep(&flv->new_extradata[0]); - av_freep(&flv->new_extradata[1]); + for (i=0; i<FLV_STREAM_TYPE_NB; i++) + av_freep(&flv->new_extradata[i]); + av_freep(&flv->keyframe_times); + av_freep(&flv->keyframe_filepositions); return 0; } static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size) { - av_free(st->codecpar->extradata); - st->codecpar->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE); - if (!st->codecpar->extradata) + av_freep(&st->codecpar->extradata); + if (ff_get_extradata(s, st->codecpar, s->pb, size) < 0) return AVERROR(ENOMEM); - st->codecpar->extradata_size = size; - avio_read(s->pb, st->codecpar->extradata, st->codecpar->extradata_size); + st->internal->need_context_update = 1; return 0; } @@ -681,8 +836,11 @@ static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, char buf[20]; int ret = AVERROR_INVALIDDATA; int i, length = -1; + int array = 0; switch (avio_r8(pb)) { + case AMF_DATA_TYPE_ARRAY: + array = 1; case AMF_DATA_TYPE_MIXEDARRAY: avio_seek(pb, 4, SEEK_CUR); case AMF_DATA_TYPE_OBJECT: @@ -691,9 +849,9 @@ static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, goto skip; } - while ((ret = amf_get_string(pb, buf, sizeof(buf))) > 0) { + while (array || (ret = amf_get_string(pb, buf, sizeof(buf))) > 0) { AMFDataType type = avio_r8(pb); - if (type == AMF_DATA_TYPE_STRING && !strcmp(buf, "text")) { + if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) { length = avio_rb16(pb); ret = av_get_packet(pb, pkt, length); if (ret < 0) @@ -713,12 +871,12 @@ static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, for (i = 0; i < s->nb_streams; i++) { st = s->streams[i]; - if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) + if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) break; } if (i == s->nb_streams) { - st = create_stream(s, AVMEDIA_TYPE_DATA); + st = create_stream(s, AVMEDIA_TYPE_SUBTITLE); if (!st) return AVERROR(ENOMEM); st->codecpar->codec_id = AV_CODEC_ID_TEXT; @@ -737,25 +895,61 @@ skip: return ret; } +static int resync(AVFormatContext *s) +{ + FLVContext *flv = s->priv_data; + int64_t i; + int64_t pos = avio_tell(s->pb); + + for (i=0; !avio_feof(s->pb); i++) { + int j = i & (RESYNC_BUFFER_SIZE-1); + int j1 = j + RESYNC_BUFFER_SIZE; + flv->resync_buffer[j ] = + flv->resync_buffer[j1] = avio_r8(s->pb); + + if (i > 22) { + unsigned lsize2 = AV_RB32(flv->resync_buffer + j1 - 4); + if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) { + unsigned size2 = AV_RB24(flv->resync_buffer + j1 - lsize2 + 1 - 4); + unsigned lsize1 = AV_RB32(flv->resync_buffer + j1 - lsize2 - 8); + if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) { + unsigned size1 = AV_RB24(flv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8); + if (size1 == lsize1 - 11 && size2 == lsize2 - 11) { + avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET); + return 1; + } + } + } + } + } + return AVERROR_EOF; +} + static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) { FLVContext *flv = s->priv_data; - int ret, i, size, flags, is_audio; + int ret, i, size, flags; enum FlvTagType type; - int64_t next, pos; + int stream_type=-1; + int64_t next, pos, meta_pos; int64_t dts, pts = AV_NOPTS_VALUE; - int sample_rate = 0, channels = 0; + int av_uninit(channels); + int av_uninit(sample_rate); AVStream *st = NULL; + int last = -1; + int orig_size; +retry: /* pkt size is repeated at end. skip it */ - for (;; avio_skip(s->pb, 4)) { pos = avio_tell(s->pb); - type = avio_r8(s->pb); + type = (avio_r8(s->pb) & 0x1F); + orig_size = size = avio_rb24(s->pb); + flv->sum_flv_tag_size += size + 11; dts = avio_rb24(s->pb); - dts |= avio_r8(s->pb) << 24; - av_log(s, AV_LOG_TRACE, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts); - if (s->pb->eof_reached) + dts |= (unsigned)avio_r8(s->pb) << 24; + av_log(s, AV_LOG_TRACE, "type:%d, size:%d, last:%d, dts:%"PRId64" pos:%"PRId64"\n", type, size, last, dts, avio_tell(s->pb)); + if (avio_feof(s->pb)) return AVERROR_EOF; avio_skip(s->pb, 3); /* stream id, always 0 */ flags = 0; @@ -776,73 +970,106 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) } } - if (size == 0) - continue; + if (size == 0) { + ret = FFERROR_REDO; + goto leave; + } next = size + avio_tell(s->pb); if (type == FLV_TAG_TYPE_AUDIO) { - is_audio = 1; + stream_type = FLV_STREAM_TYPE_AUDIO; flags = avio_r8(s->pb); size--; } else if (type == FLV_TAG_TYPE_VIDEO) { - is_audio = 0; + stream_type = FLV_STREAM_TYPE_VIDEO; flags = avio_r8(s->pb); size--; - if ((flags & 0xf0) == 0x50) /* video info / command frame */ + if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD) goto skip; - } else { - if (type == FLV_TAG_TYPE_META && size > 13 + 1 + 4) - if (flv_read_metabody(s, next) > 0) { + } else if (type == FLV_TAG_TYPE_META) { + stream_type=FLV_STREAM_TYPE_DATA; + if (size > 13 + 1 + 4) { // Header-type metadata stuff + int type; + meta_pos = avio_tell(s->pb); + type = flv_read_metabody(s, next); + if (type == 0 && dts == 0 || type < 0 || type == TYPE_UNKNOWN) { + if (type < 0 && flv->validate_count && + flv->validate_index[0].pos > next && + flv->validate_index[0].pos - 4 < next + ) { + av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n"); + next = flv->validate_index[0].pos - 4; + } + goto skip; + } else if (type == TYPE_ONTEXTDATA) { + avpriv_request_sample(s, "OnTextData packet"); return flv_data_packet(s, pkt, dts, next); - } else /* skip packet */ - av_log(s, AV_LOG_DEBUG, - "Skipping flv packet: type %d, size %d, flags %d.\n", - type, size, flags); - + } else if (type == TYPE_ONCAPTION) { + return flv_data_packet(s, pkt, dts, next); + } + avio_seek(s->pb, meta_pos, SEEK_SET); + } + } else { + av_log(s, AV_LOG_DEBUG, + "Skipping flv packet: type %d, size %d, flags %d.\n", + type, size, flags); skip: - avio_seek(s->pb, next, SEEK_SET); - continue; + if (avio_seek(s->pb, next, SEEK_SET) != next) { + // This can happen if flv_read_metabody above read past + // next, on a non-seekable input, and the preceding data has + // been flushed out from the IO buffer. + av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n"); + return AVERROR_INVALIDDATA; + } + ret = FFERROR_REDO; + goto leave; } /* skip empty data packets */ - if (!size) - continue; + if (!size) { + ret = FFERROR_REDO; + goto leave; + } /* now find stream */ for (i = 0; i < s->nb_streams; i++) { st = s->streams[i]; - if (is_audio && st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) { - if (flv_same_audio_codec(st->codecpar, flags)) + if (stream_type == FLV_STREAM_TYPE_AUDIO) { + if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && + (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags))) + break; + } else if (stream_type == FLV_STREAM_TYPE_VIDEO) { + if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && + (s->video_codec_id || flv_same_video_codec(st->codecpar, flags))) break; - } else if (!is_audio && - st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { - if (flv_same_video_codec(st->codecpar, flags)) + } else if (stream_type == FLV_STREAM_TYPE_DATA) { + if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) break; } } if (i == s->nb_streams) { - st = create_stream(s, is_audio ? AVMEDIA_TYPE_AUDIO - : AVMEDIA_TYPE_VIDEO); + static const enum AVMediaType stream_types[] = {AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_SUBTITLE}; + st = create_stream(s, stream_types[stream_type]); if (!st) return AVERROR(ENOMEM); + } - av_log(s, AV_LOG_TRACE, "%d %X %d \n", is_audio, flags, st->discard); + av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard); - if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || - is_audio) + if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && + ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || + stream_type == FLV_STREAM_TYPE_AUDIO)) av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME); - if ((st->discard >= AVDISCARD_NONKEY && - !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || is_audio)) || - (st->discard >= AVDISCARD_BIDIR && - ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio)) || - st->discard >= AVDISCARD_ALL) { + if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO))) + ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO))) + || st->discard >= AVDISCARD_ALL + ) { avio_seek(s->pb, next, SEEK_SET); - continue; + ret = FFERROR_REDO; + goto leave; } - break; - } // if not streamed and no duration from metadata then seek to end to find // the duration from the timestamps @@ -853,7 +1080,8 @@ skip: const int64_t pos = avio_tell(s->pb); // Read the last 4 bytes of the file, this should be the size of the // previous FLV tag. Use the timestamp of its payload as duration. - const int64_t fsize = avio_size(s->pb); + int64_t fsize = avio_size(s->pb); +retry_duration: avio_seek(s->pb, fsize - 4, SEEK_SET); size = avio_rb32(s->pb); if (size > 0 && size < fsize) { @@ -863,14 +1091,20 @@ skip: if (size == avio_rb24(s->pb) + 11) { uint32_t ts = avio_rb24(s->pb); ts |= avio_r8(s->pb) << 24; - s->duration = ts * (int64_t)AV_TIME_BASE / 1000; + if (ts) + s->duration = ts * (int64_t)AV_TIME_BASE / 1000; + else if (fsize >= 8 && fsize - 8 >= size) { + fsize -= size+4; + goto retry_duration; + } } } + avio_seek(s->pb, pos, SEEK_SET); flv->searched_for_end = 1; } - if (is_audio) { + if (stream_type == FLV_STREAM_TYPE_AUDIO) { int bits_per_coded_sample; channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1; sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> @@ -904,12 +1138,18 @@ skip: sample_rate = par->sample_rate; avcodec_parameters_free(&par); } - } else { - size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1); + } else if (stream_type == FLV_STREAM_TYPE_VIDEO) { + int ret = flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1); + if (ret < 0) + return ret; + size -= ret; + } else if (stream_type == FLV_STREAM_TYPE_DATA) { + st->codecpar->codec_id = AV_CODEC_ID_TEXT; } if (st->codecpar->codec_id == AV_CODEC_ID_AAC || - st->codecpar->codec_id == AV_CODEC_ID_H264) { + st->codecpar->codec_id == AV_CODEC_ID_H264 || + st->codecpar->codec_id == AV_CODEC_ID_MPEG4) { int type = avio_r8(s->pb); size--; @@ -918,35 +1158,44 @@ skip: goto leave; } - if (st->codecpar->codec_id == AV_CODEC_ID_H264) { + if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4) { // sign extension int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000; pts = dts + cts; - if (cts < 0 && !flv->wrong_dts) { // dts might be wrong + if (cts < 0) { // dts might be wrong + if (!flv->wrong_dts) + av_log(s, AV_LOG_WARNING, + "Negative cts, previous timestamps might be wrong.\n"); flv->wrong_dts = 1; + } else if (FFABS(dts - pts) > 1000*60*15) { av_log(s, AV_LOG_WARNING, - "Negative cts, previous timestamps might be wrong.\n"); + "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts); + dts = pts = AV_NOPTS_VALUE; } } - if (type == 0) { + if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC || + st->codecpar->codec_id == AV_CODEC_ID_H264)) { + AVDictionaryEntry *t; + if (st->codecpar->extradata) { - if ((ret = flv_queue_extradata(flv, s->pb, is_audio, size)) < 0) + if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0) return ret; - ret = AVERROR(EAGAIN); + ret = FFERROR_REDO; goto leave; } if ((ret = flv_get_extradata(s, st, size)) < 0) return ret; - if (st->codecpar->codec_id == AV_CODEC_ID_AAC) { - MPEG4AudioConfig cfg; - /* Workaround for buggy Omnia A/XE encoder */ - AVDictionaryEntry *t = av_dict_get(s->metadata, "Encoder", NULL, 0); - if (t && !strcmp(t->value, "Omnia A/XE")) - st->codecpar->extradata_size = 2; + /* Workaround for buggy Omnia A/XE encoder */ + t = av_dict_get(s->metadata, "Encoder", NULL, 0); + if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE")) + st->codecpar->extradata_size = 2; + + if (st->codecpar->codec_id == AV_CODEC_ID_AAC && 0) { + MPEG4AudioConfig cfg; - avpriv_mpeg4audio_get_config(&cfg, st->codecpar->extradata, - st->codecpar->extradata_size * 8, 1); + if (avpriv_mpeg4audio_get_config(&cfg, st->codecpar->extradata, + st->codecpar->extradata_size * 8, 1) >= 0) { st->codecpar->channels = cfg.channels; st->codecpar->channel_layout = 0; if (cfg.ext_sample_rate) @@ -954,51 +1203,65 @@ skip: else st->codecpar->sample_rate = cfg.sample_rate; av_log(s, AV_LOG_TRACE, "mp4a config channels %d sample rate %d\n", - st->codecpar->channels, st->codecpar->sample_rate); + st->codecpar->channels, st->codecpar->sample_rate); + } } - ret = AVERROR(EAGAIN); + ret = FFERROR_REDO; goto leave; } } /* skip empty data packets */ if (!size) { - ret = AVERROR(EAGAIN); + ret = FFERROR_REDO; goto leave; } ret = av_get_packet(s->pb, pkt, size); if (ret < 0) - return AVERROR(EIO); - /* note: we need to modify the packet size here to handle the last - * packet */ - pkt->size = ret; + return ret; pkt->dts = dts; pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts; pkt->stream_index = st->index; - if (flv->new_extradata[is_audio]) { + pkt->pos = pos; + if (flv->new_extradata[stream_type]) { uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, - flv->new_extradata_size[is_audio]); + flv->new_extradata_size[stream_type]); if (side) { - memcpy(side, flv->new_extradata[is_audio], - flv->new_extradata_size[is_audio]); - av_freep(&flv->new_extradata[is_audio]); - flv->new_extradata_size[is_audio] = 0; + memcpy(side, flv->new_extradata[stream_type], + flv->new_extradata_size[stream_type]); + av_freep(&flv->new_extradata[stream_type]); + flv->new_extradata_size[stream_type] = 0; } } - if (is_audio && (sample_rate != flv->last_sample_rate || + if (stream_type == FLV_STREAM_TYPE_AUDIO && + (sample_rate != flv->last_sample_rate || channels != flv->last_channels)) { flv->last_sample_rate = sample_rate; flv->last_channels = channels; ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0); } - if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)) + if ( stream_type == FLV_STREAM_TYPE_AUDIO || + ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) || + stream_type == FLV_STREAM_TYPE_DATA) pkt->flags |= AV_PKT_FLAG_KEY; leave: - avio_skip(s->pb, 4); + last = avio_rb32(s->pb); + if (last != orig_size + 11 && last != orig_size + 10 && + !avio_feof(s->pb) && + (last != orig_size || !last) && last != flv->sum_flv_tag_size && + !flv->broken_sizes) { + av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, flv->sum_flv_tag_size); + avio_seek(s->pb, pos + 1, SEEK_SET); + ret = resync(s); + av_packet_unref(pkt); + if (ret >= 0) { + goto retry; + } + } return ret; } @@ -1013,11 +1276,12 @@ static int flv_read_seek(AVFormatContext *s, int stream_index, #define OFFSET(x) offsetof(FLVContext, x) #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { - { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD }, + { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD }, + { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, { NULL } }; -static const AVClass class = { +static const AVClass flv_class = { .class_name = "flvdec", .item_name = av_default_item_name, .option = options, @@ -1034,5 +1298,26 @@ AVInputFormat ff_flv_demuxer = { .read_seek = flv_read_seek, .read_close = flv_read_close, .extensions = "flv", - .priv_class = &class, + .priv_class = &flv_class, +}; + +static const AVClass live_flv_class = { + .class_name = "live_flvdec", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVInputFormat ff_live_flv_demuxer = { + .name = "live_flv", + .long_name = NULL_IF_CONFIG_SMALL("live RTMP FLV (Flash Video)"), + .priv_data_size = sizeof(FLVContext), + .read_probe = live_flv_probe, + .read_header = flv_read_header, + .read_packet = flv_read_packet, + .read_seek = flv_read_seek, + .read_close = flv_read_close, + .extensions = "flv", + .priv_class = &live_flv_class, + .flags = AVFMT_TS_DISCONT }; |