diff options
Diffstat (limited to 'ffmpeg1/libavformat/flvdec.c')
| -rw-r--r-- | ffmpeg1/libavformat/flvdec.c | 923 |
1 files changed, 0 insertions, 923 deletions
diff --git a/ffmpeg1/libavformat/flvdec.c b/ffmpeg1/libavformat/flvdec.c deleted file mode 100644 index d0511f1..0000000 --- a/ffmpeg1/libavformat/flvdec.c +++ /dev/null @@ -1,923 +0,0 @@ -/* - * FLV demuxer - * Copyright (c) 2003 The FFmpeg Project - * - * This demuxer will generate a 1 byte extradata for VP6F content. - * It is composed of: - * - upper 4bits: difference between encoded width and visible width - * - lower 4bits: difference between encoded height and visible height - * - * 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 "libavutil/avstring.h" -#include "libavutil/channel_layout.h" -#include "libavutil/dict.h" -#include "libavutil/opt.h" -#include "libavutil/intfloat.h" -#include "libavutil/mathematics.h" -#include "libavcodec/bytestream.h" -#include "libavcodec/mpeg4audio.h" -#include "avformat.h" -#include "internal.h" -#include "avio_internal.h" -#include "flv.h" - -#define VALIDATE_INDEX_TS_THRESH 2500 - -typedef struct { - 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[FLV_STREAM_TYPE_NB]; - int new_extradata_size[FLV_STREAM_TYPE_NB]; - int last_sample_rate; - int last_channels; - struct { - int64_t dts; - int64_t pos; - } validate_index[2]; - int validate_next; - int validate_count; - int searched_for_end; -} FLVContext; - -static int flv_probe(AVProbeData *p) -{ - const uint8_t *d; - - 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; - } - return 0; -} - -static AVStream *create_stream(AVFormatContext *s, int codec_type) -{ - AVStream *st = avformat_new_stream(s, NULL); - if (!st) - return NULL; - st->codec->codec_type = codec_type; - if(s->nb_streams>=3 ||( s->nb_streams==2 - && s->streams[0]->codec->codec_type != AVMEDIA_TYPE_DATA - && s->streams[1]->codec->codec_type != AVMEDIA_TYPE_DATA)) - s->ctx_flags &= ~AVFMTCTX_NOHEADER; - - avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ - return st; -} -static int flv_same_audio_codec(AVCodecContext *acodec, int flags) -{ - int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8; - int flv_codecid = flags & FLV_AUDIO_CODECID_MASK; - int codec_id; - - if (!acodec->codec_id && !acodec->codec_tag) - return 1; - - if (acodec->bits_per_coded_sample != bits_per_coded_sample) - return 0; - - switch(flv_codecid) { - //no distinction between S16 and S8 PCM codec flags - case FLV_CODECID_PCM: - codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : -#if HAVE_BIGENDIAN - AV_CODEC_ID_PCM_S16BE; -#else - AV_CODEC_ID_PCM_S16LE; -#endif - return codec_id == acodec->codec_id; - case FLV_CODECID_PCM_LE: - codec_id = bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE; - return codec_id == acodec->codec_id; - case FLV_CODECID_AAC: - return acodec->codec_id == AV_CODEC_ID_AAC; - case FLV_CODECID_ADPCM: - return acodec->codec_id == AV_CODEC_ID_ADPCM_SWF; - case FLV_CODECID_SPEEX: - return acodec->codec_id == AV_CODEC_ID_SPEEX; - case FLV_CODECID_MP3: - return acodec->codec_id == AV_CODEC_ID_MP3; - case FLV_CODECID_NELLYMOSER_8KHZ_MONO: - case FLV_CODECID_NELLYMOSER_16KHZ_MONO: - case FLV_CODECID_NELLYMOSER: - return acodec->codec_id == AV_CODEC_ID_NELLYMOSER; - case FLV_CODECID_PCM_MULAW: - return acodec->sample_rate == 8000 && - acodec->codec_id == AV_CODEC_ID_PCM_MULAW; - case FLV_CODECID_PCM_ALAW: - return acodec->sample_rate = 8000 && - acodec->codec_id == AV_CODEC_ID_PCM_ALAW; - default: - return acodec->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET); - } -} - -static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, AVCodecContext *acodec, int flv_codecid) { - switch(flv_codecid) { - //no distinction between S16 and S8 PCM codec flags - case FLV_CODECID_PCM: - acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : -#if HAVE_BIGENDIAN - AV_CODEC_ID_PCM_S16BE; -#else - AV_CODEC_ID_PCM_S16LE; -#endif - break; - case FLV_CODECID_PCM_LE: - acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 : AV_CODEC_ID_PCM_S16LE; break; - case FLV_CODECID_AAC : acodec->codec_id = AV_CODEC_ID_AAC; break; - case FLV_CODECID_ADPCM: acodec->codec_id = AV_CODEC_ID_ADPCM_SWF; break; - case FLV_CODECID_SPEEX: - acodec->codec_id = AV_CODEC_ID_SPEEX; - acodec->sample_rate = 16000; - break; - case FLV_CODECID_MP3 : acodec->codec_id = AV_CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break; - case FLV_CODECID_NELLYMOSER_8KHZ_MONO: - acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate - acodec->codec_id = AV_CODEC_ID_NELLYMOSER; - break; - case FLV_CODECID_NELLYMOSER_16KHZ_MONO: - acodec->sample_rate = 16000; - acodec->codec_id = AV_CODEC_ID_NELLYMOSER; - break; - case FLV_CODECID_NELLYMOSER: - acodec->codec_id = AV_CODEC_ID_NELLYMOSER; - break; - case FLV_CODECID_PCM_MULAW: - acodec->sample_rate = 8000; - acodec->codec_id = AV_CODEC_ID_PCM_MULAW; - break; - case FLV_CODECID_PCM_ALAW: - acodec->sample_rate = 8000; - acodec->codec_id = AV_CODEC_ID_PCM_ALAW; - break; - default: - av_log(s, AV_LOG_INFO, "Unsupported audio codec (%x)\n", flv_codecid >> FLV_AUDIO_CODECID_OFFSET); - acodec->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET; - } -} - -static int flv_same_video_codec(AVCodecContext *vcodec, int flags) -{ - int flv_codecid = flags & FLV_VIDEO_CODECID_MASK; - - if (!vcodec->codec_id && !vcodec->codec_tag) - return 1; - - switch (flv_codecid) { - case FLV_CODECID_H263: - return vcodec->codec_id == AV_CODEC_ID_FLV1; - case FLV_CODECID_SCREEN: - return vcodec->codec_id == AV_CODEC_ID_FLASHSV; - case FLV_CODECID_SCREEN2: - return vcodec->codec_id == AV_CODEC_ID_FLASHSV2; - case FLV_CODECID_VP6: - return vcodec->codec_id == AV_CODEC_ID_VP6F; - case FLV_CODECID_VP6A: - return vcodec->codec_id == AV_CODEC_ID_VP6A; - case FLV_CODECID_H264: - return vcodec->codec_id == AV_CODEC_ID_H264; - default: - return vcodec->codec_tag == flv_codecid; - } -} - -static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid, int read) { - AVCodecContext *vcodec = vstream->codec; - switch(flv_codecid) { - case FLV_CODECID_H263 : vcodec->codec_id = AV_CODEC_ID_FLV1 ; break; - case FLV_CODECID_REALH263: vcodec->codec_id = AV_CODEC_ID_H263 ; break; // Really mean it this time - case FLV_CODECID_SCREEN: vcodec->codec_id = AV_CODEC_ID_FLASHSV; break; - case FLV_CODECID_SCREEN2: vcodec->codec_id = AV_CODEC_ID_FLASHSV2; break; - case FLV_CODECID_VP6 : vcodec->codec_id = AV_CODEC_ID_VP6F ; - case FLV_CODECID_VP6A : - if(flv_codecid == FLV_CODECID_VP6A) - vcodec->codec_id = AV_CODEC_ID_VP6A; - if (read) { - if (vcodec->extradata_size != 1) { - vcodec->extradata = av_malloc(1 + FF_INPUT_BUFFER_PADDING_SIZE); - if (vcodec->extradata) - vcodec->extradata_size = 1; - } - if (vcodec->extradata) - vcodec->extradata[0] = avio_r8(s->pb); - else - avio_skip(s->pb, 1); - } - return 1; // 1 byte body size adjustment for flv_read_packet() - case FLV_CODECID_H264: - vcodec->codec_id = AV_CODEC_ID_H264; - return 3; // not 4, reading packet type will consume one byte - case FLV_CODECID_MPEG4: - vcodec->codec_id = AV_CODEC_ID_MPEG4; - return 3; - default: - av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid); - vcodec->codec_tag = flv_codecid; - } - - return 0; -} - -static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) { - int length = avio_rb16(ioc); - if(length >= buffsize) { - avio_skip(ioc, length); - return -1; - } - - avio_read(ioc, buffer, length); - - buffer[length] = '\0'; - - return length; -} - -static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) { - FLVContext *flv = s->priv_data; - 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(vstream->nb_index_entries>0){ - av_log(s, AV_LOG_WARNING, "Skiping duplicate index\n"); - return 0; - } - - 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; - unsigned int arraylen; - - // Expect array object in context - if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY) - break; - - arraylen = avio_rb32(ioc); - if(arraylen>>28) - break; - - if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times){ - current_array= × - timeslen= arraylen; - }else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) && !filepositions){ - current_array= &filepositions; - fileposlen= arraylen; - }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 invalid; - current_array[0][i] = av_int2double(avio_rb64(ioc)); - } - if (times && filepositions) { - // All done, exiting at a position allowing amf_parse_object - // to finish parsing the object - ret = 0; - break; - } - } - - if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) { - 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; - } - } - } else { -invalid: - av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n"); - } - -finish: - av_freep(×); - av_freep(&filepositions); - avio_seek(ioc, initial_pos, SEEK_SET); - return ret; -} - -static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, int64_t max_pos, int depth) { - AVCodecContext *acodec, *vcodec; - FLVContext *flv = s->priv_data; - AVIOContext *ioc; - AMFDataType amf_type; - char str_val[256]; - double num_val; - - num_val = 0; - ioc = s->pb; - - amf_type = avio_r8(ioc); - - switch(amf_type) { - case AMF_DATA_TYPE_NUMBER: - num_val = av_int2double(avio_rb64(ioc)); break; - case AMF_DATA_TYPE_BOOL: - num_val = avio_r8(ioc); break; - case AMF_DATA_TYPE_STRING: - if(amf_get_string(ioc, str_val, sizeof(str_val)) < 0) - return -1; - break; - case AMF_DATA_TYPE_OBJECT: - if ((vstream || astream) && ioc->seekable && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1) - if (parse_keyframes_index(s, ioc, vstream ? vstream : astream, - max_pos) < 0) - av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n"); - - 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) - 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: - 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) { - //this is the only case in which we would want a nested parse to not skip over the object - if(amf_parse_object(s, astream, vstream, str_val, max_pos, depth + 1) < 0) - return -1; - } - if(avio_r8(ioc) != AMF_END_OF_OBJECT) - return -1; - break; - case AMF_DATA_TYPE_ARRAY: { - unsigned int arraylen, i; - - arraylen = avio_rb32(ioc); - for(i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) { - if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0) - return -1; //if we couldn't skip, bomb out. - } - } - break; - case AMF_DATA_TYPE_DATE: - avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16) - break; - default: //unsupported type, we couldn't skip - return -1; - } - - if(depth == 1 && key) { //only look for metadata values when we are not nested and key != NULL - acodec = astream ? astream->codec : NULL; - vcodec = vstream ? vstream->codec : NULL; - - if (amf_type == AMF_DATA_TYPE_NUMBER) { - if (!strcmp(key, "duration")) - s->duration = num_val * AV_TIME_BASE; - else if (!strcmp(key, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0)) - vcodec->bit_rate = num_val * 1024.0; - else if (!strcmp(key, "audiodatarate") && acodec && 0 <= (int)(num_val * 1024.0)) - acodec->bit_rate = num_val * 1024.0; - else if (!strcmp(key, "datastream")) { - AVStream *st = create_stream(s, AVMEDIA_TYPE_DATA); - if (!st) - return AVERROR(ENOMEM); - st->codec->codec_id = AV_CODEC_ID_TEXT; - } else if (flv->trust_metadata) { - if (!strcmp(key, "videocodecid") && vcodec) { - flv_set_video_codec(s, vstream, num_val, 0); - } else - if (!strcmp(key, "audiocodecid") && acodec) { - flv_set_audio_codec(s, astream, acodec, num_val); - } else - if (!strcmp(key, "audiosamplerate") && acodec) { - acodec->sample_rate = num_val; - } else - if (!strcmp(key, "width") && vcodec) { - vcodec->width = num_val; - } else - if (!strcmp(key, "height") && vcodec) { - vcodec->height = num_val; - } - } - } - - if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 && - ((!acodec && !strcmp(key, "audiocodecid")) || - (!vcodec && !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") || - !strcmp(key, "height") || - !strcmp(key, "videodatarate") || - !strcmp(key, "framerate") || - !strcmp(key, "videocodecid") || - !strcmp(key, "audiodatarate") || - !strcmp(key, "audiosamplerate") || - !strcmp(key, "audiosamplesize") || - !strcmp(key, "stereo") || - !strcmp(key, "audiocodecid")) - return 0; - - if(amf_type == AMF_DATA_TYPE_BOOL) { - av_strlcpy(str_val, num_val > 0 ? "true" : "false", sizeof(str_val)); - av_dict_set(&s->metadata, key, str_val, 0); - } else if(amf_type == AMF_DATA_TYPE_NUMBER) { - snprintf(str_val, sizeof(str_val), "%.f", num_val); - av_dict_set(&s->metadata, key, str_val, 0); - } else if (amf_type == AMF_DATA_TYPE_STRING) - av_dict_set(&s->metadata, key, str_val, 0); - } - - return 0; -} - -static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) { - AMFDataType type; - AVStream *stream, *astream, *vstream, *dstream; - AVIOContext *ioc; - int i; - char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want. - - vstream = astream = 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; - - if (!strcmp(buffer, "onTextData")) - return 1; - - if (strcmp(buffer, "onMetaData")) - return -1; - - //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->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream; - else if(stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream; - else if(stream->codec->codec_type == AVMEDIA_TYPE_DATA) dstream = stream; - } - - //parse the second object (we want a mixed array) - if(amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0) - return -1; - - return 0; -} - -static int flv_read_header(AVFormatContext *s) -{ - int offset, flags; - - avio_skip(s->pb, 4); - flags = avio_r8(s->pb); - /* old flvtool cleared this field */ - /* FIXME: better fix needed */ - if (!flags) { - flags = FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO; - av_log(s, AV_LOG_WARNING, "Broken FLV file, which says no streams present, this might fail\n"); - } - - s->ctx_flags |= AVFMTCTX_NOHEADER; - - if(flags & FLV_HEADER_FLAG_HASVIDEO){ - if(!create_stream(s, AVMEDIA_TYPE_VIDEO)) - return AVERROR(ENOMEM); - } - if(flags & FLV_HEADER_FLAG_HASAUDIO){ - if(!create_stream(s, AVMEDIA_TYPE_AUDIO)) - return AVERROR(ENOMEM); - } - // Flag doesn't indicate whether or not there is script-data present. Must - // create that stream if it's encountered. - - offset = avio_rb32(s->pb); - avio_seek(s->pb, offset, SEEK_SET); - avio_skip(s->pb, 4); - - s->start_time = 0; - - return 0; -} - -static int flv_read_close(AVFormatContext *s) -{ - int i; - FLVContext *flv = s->priv_data; - for(i=0; i<FLV_STREAM_TYPE_NB; i++) - av_freep(&flv->new_extradata[i]); - return 0; -} - -static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size) -{ - av_free(st->codec->extradata); - st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!st->codec->extradata) - return AVERROR(ENOMEM); - st->codec->extradata_size = size; - avio_read(s->pb, st->codec->extradata, st->codec->extradata_size); - return 0; -} - -static int flv_queue_extradata(FLVContext *flv, AVIOContext *pb, int stream, - int size) -{ - av_free(flv->new_extradata[stream]); - flv->new_extradata[stream] = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE); - if (!flv->new_extradata[stream]) - return AVERROR(ENOMEM); - flv->new_extradata_size[stream] = size; - avio_read(pb, flv->new_extradata[stream], size); - return 0; -} - -static void clear_index_entries(AVFormatContext *s, int64_t pos) -{ - int i, j, out; - av_log(s, AV_LOG_WARNING, "Found invalid index entries, clearing the index.\n"); - for (i = 0; i < s->nb_streams; i++) { - AVStream *st = s->streams[i]; - /* Remove all index entries that point to >= pos */ - out = 0; - for (j = 0; j < st->nb_index_entries; j++) { - if (st->index_entries[j].pos < pos) - st->index_entries[out++] = st->index_entries[j]; - } - st->nb_index_entries = out; - } -} - - -static int flv_data_packet(AVFormatContext *s, AVPacket *pkt, - int64_t dts, int64_t next) -{ - int ret = AVERROR_INVALIDDATA, i; - AVIOContext *pb = s->pb; - AVStream *st = NULL; - AMFDataType type; - char buf[20]; - int length; - - type = avio_r8(pb); - if (type == AMF_DATA_TYPE_MIXEDARRAY) - avio_seek(pb, 4, SEEK_CUR); - else if (type != AMF_DATA_TYPE_OBJECT) - goto out; - - amf_get_string(pb, buf, sizeof(buf)); - if (strcmp(buf, "type") || avio_r8(pb) != AMF_DATA_TYPE_STRING) - goto out; - - amf_get_string(pb, buf, sizeof(buf)); - //FIXME parse it as codec_id - amf_get_string(pb, buf, sizeof(buf)); - if (strcmp(buf, "text") || avio_r8(pb) != AMF_DATA_TYPE_STRING) - goto out; - - length = avio_rb16(pb); - ret = av_get_packet(s->pb, pkt, length); - if (ret < 0) { - ret = AVERROR(EIO); - goto out; - } - - for (i = 0; i < s->nb_streams; i++) { - st = s->streams[i]; - if (st->codec->codec_type == AVMEDIA_TYPE_DATA) - break; - } - - if (i == s->nb_streams) { - st = create_stream(s, AVMEDIA_TYPE_DATA); - if (!st) - goto out; - st->codec->codec_id = AV_CODEC_ID_TEXT; - } - - pkt->dts = dts; - pkt->pts = dts; - pkt->size = ret; - - pkt->stream_index = st->index; - pkt->flags |= AV_PKT_FLAG_KEY; - - avio_seek(s->pb, next + 4, SEEK_SET); -out: - return ret; -} - -static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - FLVContext *flv = s->priv_data; - int ret, i, type, size, flags; - int stream_type=-1; - int64_t next, pos; - int64_t dts, pts = AV_NOPTS_VALUE; - int av_uninit(channels); - int av_uninit(sample_rate); - AVStream *st = NULL; - - for(;;avio_skip(s->pb, 4)){ /* pkt size is repeated at end. skip it */ - pos = avio_tell(s->pb); - type = avio_r8(s->pb); - size = avio_rb24(s->pb); - dts = avio_rb24(s->pb); - dts |= avio_r8(s->pb) << 24; - av_dlog(s, "type:%d, size:%d, dts:%"PRId64"\n", type, size, dts); - if (url_feof(s->pb)) - return AVERROR_EOF; - avio_skip(s->pb, 3); /* stream id, always 0 */ - flags = 0; - - if (flv->validate_next < flv->validate_count) { - int64_t validate_pos = flv->validate_index[flv->validate_next].pos; - if (pos == validate_pos) { - if (FFABS(dts - flv->validate_index[flv->validate_next].dts) <= - VALIDATE_INDEX_TS_THRESH) { - flv->validate_next++; - } else { - clear_index_entries(s, validate_pos); - flv->validate_count = 0; - } - } else if (pos > validate_pos) { - clear_index_entries(s, validate_pos); - flv->validate_count = 0; - } - } - - if(size == 0) - continue; - - next= size + avio_tell(s->pb); - - if (type == FLV_TAG_TYPE_AUDIO) { - stream_type=FLV_STREAM_TYPE_AUDIO; - flags = avio_r8(s->pb); - size--; - } else if (type == FLV_TAG_TYPE_VIDEO) { - stream_type=FLV_STREAM_TYPE_VIDEO; - flags = avio_r8(s->pb); - size--; - if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD) - goto skip; - } else if (type == FLV_TAG_TYPE_META) { - if (size > 13+1+4 && dts == 0) { // Header-type metadata stuff - flv_read_metabody(s, next); - goto skip; - } else if (dts != 0) { // Script-data "special" metadata frames - don't skip - stream_type=FLV_STREAM_TYPE_DATA; - } else { - goto skip; - } - } 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; - } - - /* skip empty data packets */ - if (!size) - continue; - - /* now find stream */ - for(i=0;i<s->nb_streams;i++) { - st = s->streams[i]; - if (stream_type == FLV_STREAM_TYPE_AUDIO) { - if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && - (s->audio_codec_id || flv_same_audio_codec(st->codec, flags))) { - break; - } - } else - if (stream_type == FLV_STREAM_TYPE_VIDEO) { - if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && - (s->video_codec_id || flv_same_video_codec(st->codec, flags))) { - break; - } - } else if (stream_type == FLV_STREAM_TYPE_DATA) { - if (st->codec->codec_type == AVMEDIA_TYPE_DATA) - break; - } - } - if(i == s->nb_streams){ - av_log(s, AV_LOG_WARNING, "Stream discovered after head already parsed\n"); - st = create_stream(s, - (int[]){AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_DATA}[stream_type]); - if (!st) - return AVERROR(ENOMEM); - - } - av_dlog(s, "%d %X %d \n", stream_type, flags, st->discard); - 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; - } - if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) - av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME); - break; - } - - // if not streamed and no duration from metadata then seek to end to find the duration from the timestamps - if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE) && !flv->searched_for_end){ - int size; - const int64_t pos= avio_tell(s->pb); - int64_t fsize= avio_size(s->pb); -retry_duration: - avio_seek(s->pb, fsize-4, SEEK_SET); - size= avio_rb32(s->pb); - avio_seek(s->pb, fsize-3-size, SEEK_SET); - if(size == avio_rb24(s->pb) + 11){ - uint32_t ts = avio_rb24(s->pb); - ts |= avio_r8(s->pb) << 24; - 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(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) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3); - bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8; - if(!st->codec->channels || !st->codec->sample_rate || !st->codec->bits_per_coded_sample) { - st->codec->channels = channels; - st->codec->channel_layout = channels == 1 ? AV_CH_LAYOUT_MONO : - AV_CH_LAYOUT_STEREO; - st->codec->sample_rate = sample_rate; - st->codec->bits_per_coded_sample = bits_per_coded_sample; - } - if(!st->codec->codec_id){ - flv_set_audio_codec(s, st, st->codec, flags & FLV_AUDIO_CODECID_MASK); - flv->last_sample_rate = sample_rate = st->codec->sample_rate; - flv->last_channels = channels = st->codec->channels; - } else { - AVCodecContext ctx; - ctx.sample_rate = sample_rate; - flv_set_audio_codec(s, st, &ctx, flags & FLV_AUDIO_CODECID_MASK); - sample_rate = ctx.sample_rate; - } - } else if(stream_type == FLV_STREAM_TYPE_VIDEO) { - size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1); - } - - if (st->codec->codec_id == AV_CODEC_ID_AAC || - st->codec->codec_id == AV_CODEC_ID_H264 || - st->codec->codec_id == AV_CODEC_ID_MPEG4) { - int type = avio_r8(s->pb); - size--; - if (st->codec->codec_id == AV_CODEC_ID_H264 || st->codec->codec_id == AV_CODEC_ID_MPEG4) { - int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension - pts = dts + cts; - if (cts < 0) { // dts are wrong - flv->wrong_dts = 1; - av_log(s, AV_LOG_WARNING, "negative cts, previous timestamps might be wrong\n"); - } - if (flv->wrong_dts) - dts = AV_NOPTS_VALUE; - } - if (type == 0 && (!st->codec->extradata || st->codec->codec_id == AV_CODEC_ID_AAC)) { - if (st->codec->extradata) { - if ((ret = flv_queue_extradata(flv, s->pb, stream_type, size)) < 0) - return ret; - ret = AVERROR(EAGAIN); - goto leave; - } - if ((ret = flv_get_extradata(s, st, size)) < 0) - return ret; - if (st->codec->codec_id == AV_CODEC_ID_AAC && 0) { - MPEG4AudioConfig cfg; - if (avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata, - st->codec->extradata_size * 8, 1) >= 0) { - st->codec->channels = cfg.channels; - st->codec->channel_layout = 0; - if (cfg.ext_sample_rate) - st->codec->sample_rate = cfg.ext_sample_rate; - else - st->codec->sample_rate = cfg.sample_rate; - av_dlog(s, "mp4a config channels %d sample rate %d\n", - st->codec->channels, st->codec->sample_rate); - } - } - - ret = AVERROR(EAGAIN); - goto leave; - } - } - - /* skip empty data packets */ - if (!size) { - ret = AVERROR(EAGAIN); - goto leave; - } - - ret= av_get_packet(s->pb, pkt, size); - if (ret < 0) - return ret; - pkt->dts = dts; - pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts; - pkt->stream_index = st->index; - if (flv->new_extradata[stream_type]) { - uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, - flv->new_extradata_size[stream_type]); - if (side) { - 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 (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 ( 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); - return ret; -} - -static int flv_read_seek(AVFormatContext *s, int stream_index, - int64_t ts, int flags) -{ - FLVContext *flv = s->priv_data; - flv->validate_count = 0; - return avio_seek_time(s->pb, stream_index, ts, flags); -} - -#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 the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD}, - { NULL } -}; - -static const AVClass class = { - .class_name = "flvdec", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, -}; - -AVInputFormat ff_flv_demuxer = { - .name = "flv", - .long_name = NULL_IF_CONFIG_SMALL("FLV (Flash Video)"), - .priv_data_size = sizeof(FLVContext), - .read_probe = 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 = &class, -}; |