diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/flvdec.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/flvdec.c | 395 |
1 files changed, 0 insertions, 395 deletions
diff --git a/contrib/ffmpeg/libavformat/flvdec.c b/contrib/ffmpeg/libavformat/flvdec.c deleted file mode 100644 index bf91fbbc7..000000000 --- a/contrib/ffmpeg/libavformat/flvdec.c +++ /dev/null @@ -1,395 +0,0 @@ -/* - * FLV demuxer - * Copyright (c) 2003 The FFmpeg Project. - * - * 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 - * - * - * 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 - */ -#include "avformat.h" -#include "flv.h" - -static int flv_probe(AVProbeData *p) -{ - const uint8_t *d; - - if (p->buf_size < 6) - return 0; - d = p->buf; - if (d[0] == 'F' && d[1] == 'L' && d[2] == 'V' && d[3] < 5 && d[5]==0) { - return AVPROBE_SCORE_MAX; - } - return 0; -} - -static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, int flv_codecid) { - AVCodecContext *acodec = astream->codec; - switch(flv_codecid) { - //no distinction between S16 and S8 PCM codec flags - case FLV_CODECID_PCM_BE: - acodec->codec_id = acodec->bits_per_sample == 8 ? CODEC_ID_PCM_S8 : CODEC_ID_PCM_S16BE; break; - case FLV_CODECID_PCM_LE: - acodec->codec_id = acodec->bits_per_sample == 8 ? CODEC_ID_PCM_S8 : CODEC_ID_PCM_S16LE; break; - case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break; - case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = 1 ; break; - case FLV_CODECID_NELLYMOSER_8HZ_MONO: - acodec->sample_rate = 8000; //in case metadata does not otherwise declare samplerate - case FLV_CODECID_NELLYMOSER: - 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_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_codecid) { - AVCodecContext *vcodec = vstream->codec; - switch(flv_codecid) { - case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break; - case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break; - case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ; - if(vcodec->extradata_size != 1) { - vcodec->extradata_size = 1; - vcodec->extradata = av_malloc(1); - } - vcodec->extradata[0] = get_byte(&s->pb); - return 1; // 1 byte body size adjustment for flv_read_packet() - 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(ByteIOContext *ioc, char *buffer, int buffsize) { - int length = get_be16(ioc); - if(length >= buffsize) { - url_fskip(ioc, length); - return -1; - } - - get_buffer(ioc, buffer, length); - - buffer[length] = '\0'; - - return length; -} - -static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vstream, const char *key, unsigned int max_pos, int depth) { - AVCodecContext *acodec, *vcodec; - ByteIOContext *ioc; - AMFDataType amf_type; - char str_val[256]; - double num_val; - - num_val = 0; - ioc = &s->pb; - - amf_type = get_byte(ioc); - - switch(amf_type) { - case AMF_DATA_TYPE_NUMBER: - num_val = av_int2dbl(get_be64(ioc)); break; - case AMF_DATA_TYPE_BOOL: - num_val = get_byte(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: { - unsigned int keylen; - - while(url_ftell(ioc) < max_pos - 2 && (keylen = get_be16(ioc))) { - url_fskip(ioc, keylen); //skip key string - if(amf_parse_object(s, NULL, NULL, NULL, max_pos, depth + 1) < 0) - return -1; //if we couldn't skip, bomb out. - } - if(get_byte(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: - url_fskip(ioc, 4); //skip 32-bit max array index - while(url_ftell(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(get_byte(ioc) != AMF_END_OF_OBJECT) - return -1; - break; - case AMF_DATA_TYPE_ARRAY: { - unsigned int arraylen, i; - - arraylen = get_be32(ioc); - for(i = 0; i < arraylen && url_ftell(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: - url_fskip(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_BOOL) { - if(!strcmp(key, "stereo") && acodec) acodec->channels = num_val > 0 ? 2 : 1; - } else if(amf_type == AMF_DATA_TYPE_NUMBER) { - if(!strcmp(key, "duration")) s->duration = num_val * AV_TIME_BASE; -// else if(!strcmp(key, "width") && vcodec && num_val > 0) vcodec->width = num_val; -// else if(!strcmp(key, "height") && vcodec && num_val > 0) vcodec->height = num_val; - else if(!strcmp(key, "audiocodecid") && acodec) flv_set_audio_codec(s, astream, (int)num_val << FLV_AUDIO_CODECID_OFFSET); - else if(!strcmp(key, "videocodecid") && vcodec) flv_set_video_codec(s, vstream, (int)num_val); - else if(!strcmp(key, "audiosamplesize") && acodec && num_val >= 0) { - acodec->bits_per_sample = num_val; - //we may have to rewrite a previously read codecid because FLV only marks PCM endianness. - if(num_val == 8 && (acodec->codec_id == CODEC_ID_PCM_S16BE || acodec->codec_id == CODEC_ID_PCM_S16LE)) - acodec->codec_id = CODEC_ID_PCM_S8; - } - else if(!strcmp(key, "audiosamplerate") && acodec && num_val >= 0) { - //some tools, like FLVTool2, write consistently approximate metadata sample rates - switch((int)num_val) { - case 44000: acodec->sample_rate = 44100 ; break; - case 22000: acodec->sample_rate = 22050 ; break; - case 11000: acodec->sample_rate = 11025 ; break; - case 5000 : acodec->sample_rate = 5512 ; break; - default : acodec->sample_rate = num_val; - } - } - } - } - - return 0; -} - -static int flv_read_metabody(AVFormatContext *s, unsigned int next_pos) { - AMFDataType type; - AVStream *stream, *astream, *vstream; - ByteIOContext *ioc; - int i, keylen; - char buffer[11]; //only needs to hold the string "onMetaData". Anything longer is something we don't want. - - astream = NULL; - vstream = NULL; - keylen = 0; - ioc = &s->pb; - - //first object needs to be "onMetaData" string - type = get_byte(ioc); - if(type != AMF_DATA_TYPE_STRING || amf_get_string(ioc, buffer, sizeof(buffer)) < 0 || 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 == CODEC_TYPE_AUDIO) astream = stream; - else if(stream->codec->codec_type == CODEC_TYPE_VIDEO) vstream = 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, - AVFormatParameters *ap) -{ - int offset, flags; - AVStream *st; - - url_fskip(&s->pb, 4); - flags = get_byte(&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"); - } - - if(flags & FLV_HEADER_FLAG_HASVIDEO){ - st = av_new_stream(s, 0); - if (!st) - return AVERROR_NOMEM; - st->codec->codec_type = CODEC_TYPE_VIDEO; - av_set_pts_info(st, 24, 1, 1000); /* 24 bit pts in ms */ - } - if(flags & FLV_HEADER_FLAG_HASAUDIO){ - st = av_new_stream(s, 1); - if (!st) - return AVERROR_NOMEM; - st->codec->codec_type = CODEC_TYPE_AUDIO; - av_set_pts_info(st, 24, 1, 1000); /* 24 bit pts in ms */ - } - - offset = get_be32(&s->pb); - url_fseek(&s->pb, offset, SEEK_SET); - - s->start_time = 0; - - return 0; -} - -static int flv_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - int ret, i, type, size, pts, flags, is_audio, next, pos; - AVStream *st = NULL; - - for(;;){ - pos = url_ftell(&s->pb); - url_fskip(&s->pb, 4); /* size of previous packet */ - type = get_byte(&s->pb); - size = get_be24(&s->pb); - pts = get_be24(&s->pb); -// av_log(s, AV_LOG_DEBUG, "type:%d, size:%d, pts:%d\n", type, size, pts); - if (url_feof(&s->pb)) - return AVERROR_IO; - url_fskip(&s->pb, 4); /* reserved */ - flags = 0; - - if(size == 0) - continue; - - next= size + url_ftell(&s->pb); - - if (type == FLV_TAG_TYPE_AUDIO) { - is_audio=1; - flags = get_byte(&s->pb); - } else if (type == FLV_TAG_TYPE_VIDEO) { - is_audio=0; - flags = get_byte(&s->pb); - } else { - if (type == FLV_TAG_TYPE_META && size > 13+1+4) - flv_read_metabody(s, next); - else /* skip packet */ - av_log(s, AV_LOG_ERROR, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags); - url_fseek(&s->pb, next, SEEK_SET); - continue; - } - - /* now find stream */ - for(i=0;i<s->nb_streams;i++) { - st = s->streams[i]; - if (st->id == is_audio) - break; - } - if(i == s->nb_streams){ - av_log(NULL, AV_LOG_ERROR, "invalid stream\n"); - url_fseek(&s->pb, next, SEEK_SET); - continue; - } -// av_log(NULL, AV_LOG_DEBUG, "%d %X %d \n", is_audio, flags, st->discard); - 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 - ){ - url_fseek(&s->pb, next, SEEK_SET); - continue; - } - if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) - av_add_index_entry(st, pos, pts, 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(!url_is_streamed(&s->pb) && s->duration==AV_NOPTS_VALUE){ - int size; - const int pos= url_ftell(&s->pb); - const int fsize= url_fsize(&s->pb); - url_fseek(&s->pb, fsize-4, SEEK_SET); - size= get_be32(&s->pb); - url_fseek(&s->pb, fsize-3-size, SEEK_SET); - if(size == get_be24(&s->pb) + 11){ - s->duration= get_be24(&s->pb) * (int64_t)AV_TIME_BASE / 1000; - } - url_fseek(&s->pb, pos, SEEK_SET); - } - - if(is_audio){ - if(!st->codec->sample_rate || !st->codec->bits_per_sample || (!st->codec->codec_id && !st->codec->codec_tag)) { - st->codec->channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1; - if((flags & FLV_AUDIO_CODECID_MASK) == FLV_CODECID_NELLYMOSER_8HZ_MONO) - st->codec->sample_rate= 8000; - else - st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3); - st->codec->bits_per_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8; - flv_set_audio_codec(s, st, flags & FLV_AUDIO_CODECID_MASK); - } - }else{ - size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK); - } - - ret= av_get_packet(&s->pb, pkt, size - 1); - if (ret <= 0) { - return AVERROR_IO; - } - /* note: we need to modify the packet size here to handle the last - packet */ - pkt->size = ret; - pkt->pts = pts; - pkt->stream_index = st->index; - - if (is_audio || ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)) - pkt->flags |= PKT_FLAG_KEY; - - return ret; -} - -static int flv_read_close(AVFormatContext *s) -{ - return 0; -} - -static int flv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) -{ - AVStream *st = s->streams[stream_index]; - int index = av_index_search_timestamp(st, timestamp, flags); - if (index < 0) - return -1; - url_fseek(&s->pb, st->index_entries[index].pos, SEEK_SET); - - return 0; -} - -AVInputFormat flv_demuxer = { - "flv", - "flv format", - 0, - flv_probe, - flv_read_header, - flv_read_packet, - flv_read_close, - flv_read_seek, - .extensions = "flv", - .value = CODEC_ID_FLV1, -}; |