/*
* FLV demuxer
- * Copyright (c) 2003 The FFmpeg Project
+ * Copyright (c) 2003 The Libav 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.
+ * 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 "libavutil/avstring.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 KEYFRAMES_TAG "keyframes"
+#define KEYFRAMES_TIMESTAMP_TAG "times"
+#define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
+
+#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[2];
+ int new_extradata_size[2];
+ int last_sample_rate;
+ int last_channels;
+ struct {
+ int64_t dts;
+ int64_t pos;
+ } validate_index[2];
+ int validate_next;
+ int validate_count;
} 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) {
+ 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 void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, int flv_codecid) {
- AVCodecContext *acodec = astream->codec;
+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;
+ 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);
+ }
+
+ return 0;
+}
+
+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 ? CODEC_ID_PCM_S8 :
-#ifdef WORDS_BIGENDIAN
- CODEC_ID_PCM_S16BE;
+ acodec->codec_id = acodec->bits_per_coded_sample == 8 ? AV_CODEC_ID_PCM_U8 :
+#if HAVE_BIGENDIAN
+ AV_CODEC_ID_PCM_S16BE;
#else
- CODEC_ID_PCM_S16LE;
+ AV_CODEC_ID_PCM_S16LE;
#endif
break;
case FLV_CODECID_PCM_LE:
- acodec->codec_id = acodec->bits_per_coded_sample == 8 ? CODEC_ID_PCM_S8 : CODEC_ID_PCM_S16LE; break;
- case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
- case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
+ 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 = CODEC_ID_SPEEX;
+ acodec->codec_id = AV_CODEC_ID_SPEEX;
acodec->sample_rate = 16000;
break;
- case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; 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 = CODEC_ID_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);
}
}
+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;
+ }
+
+ return 0;
+}
+
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 ;
+ case FLV_CODECID_H263 : vcodec->codec_id = AV_CODEC_ID_FLV1 ; break;
+ 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 = CODEC_ID_VP6A;
+ vcodec->codec_id = AV_CODEC_ID_VP6A;
if(vcodec->extradata_size != 1) {
vcodec->extradata_size = 1;
vcodec->extradata = av_malloc(1);
}
- vcodec->extradata[0] = get_byte(s->pb);
+ vcodec->extradata[0] = avio_r8(s->pb);
return 1; // 1 byte body size adjustment for flv_read_packet()
case FLV_CODECID_H264:
- vcodec->codec_id = CODEC_ID_H264;
+ vcodec->codec_id = AV_CODEC_ID_H264;
return 3; // not 4, reading packet type will consume one byte
default:
av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
return 0;
}
-static int amf_get_string(ByteIOContext *ioc, char *buffer, int buffsize) {
- int length = get_be16(ioc);
+static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
+ int length = avio_rb16(ioc);
if(length >= buffsize) {
- url_fskip(ioc, length);
+ avio_skip(ioc, length);
return -1;
}
- get_buffer(ioc, buffer, length);
+ 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 arraylen = 0, timeslen = 0, fileposlen = 0, i;
+ double num_val;
+ char str_val[256];
+ int64_t *times = NULL;
+ int64_t *filepositions = NULL;
+ int ret = AVERROR(ENOSYS);
+ int64_t initial_pos = avio_tell(ioc);
+
+ 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;
+
+ // Expect array object in context
+ if (avio_r8(ioc) != AMF_DATA_TYPE_ARRAY)
+ break;
+
+ arraylen = avio_rb32(ioc);
+ 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;
+ }
+ 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;
+ }
+ fileposlen = arraylen;
+ current_array = filepositions;
+ } else // unexpected metatag inside keyframes, will not use such metadata for indexing
+ break;
+
+ 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;
+ }
+ if (times && filepositions) {
+ // All done, exiting at a position allowing amf_parse_object
+ // to finish parsing the object
+ ret = 0;
+ break;
+ }
+ }
+
+ 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;
+ }
+ }
+ } else
+ 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;
+ 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;
- ByteIOContext *ioc;
+ 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 = get_byte(ioc);
+ amf_type = avio_r8(ioc);
switch(amf_type) {
case AMF_DATA_TYPE_NUMBER:
- num_val = av_int2dbl(get_be64(ioc)); break;
+ num_val = av_int2double(avio_rb64(ioc)); break;
case AMF_DATA_TYPE_BOOL:
- num_val = get_byte(ioc); break;
+ 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: {
- unsigned int keylen;
+ case AMF_DATA_TYPE_OBJECT:
+ if ((vstream || astream) && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
+ if (parse_keyframes_index(s, ioc, vstream ? vstream : astream,
+ max_pos) < 0)
+ return -1;
- 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)
+ 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(get_byte(ioc) != AMF_END_OF_OBJECT)
+ 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:
- 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) {
+ 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(get_byte(ioc) != AMF_END_OF_OBJECT)
+ if(avio_r8(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++) {
+ 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:
- url_fskip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
+ avio_skip(ioc, 8 + 2); //timestamp (double) and UTC offset (int16)
break;
default: //unsupported type, we couldn't skip
return -1;
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, "videodatarate") && vcodec && 0 <= (int)(num_val * 1024.0))
+ 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, "audiocodecid") && acodec && 0 <= (int)num_val)
- flv_set_audio_codec(s, astream, (int)num_val << FLV_AUDIO_CODECID_OFFSET);
- else if(!strcmp(key, "videocodecid") && vcodec && 0 <= (int)num_val)
- flv_set_video_codec(s, vstream, (int)num_val);
- else if(!strcmp(key, "audiosamplesize") && acodec && 0 < (int)num_val) {
- acodec->bits_per_coded_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
- if (!acodec->sample_rate) {
- 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;
- }
+ 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);
+ } 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 (!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;
- ByteIOContext *ioc;
- int i, keylen;
+ AVIOContext *ioc;
+ int i;
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"))
+ 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 == CODEC_TYPE_AUDIO) astream = stream;
- else if(stream->codec->codec_type == CODEC_TYPE_VIDEO) vstream = stream;
+ if (stream->codec->codec_type == AVMEDIA_TYPE_AUDIO) astream = stream;
+ else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
}
//parse the second object (we want a mixed array)
return 0;
}
-static AVStream *create_stream(AVFormatContext *s, int is_audio){
- AVStream *st = av_new_stream(s, is_audio);
- if (!st)
- return NULL;
- st->codec->codec_type = is_audio ? CODEC_TYPE_AUDIO : CODEC_TYPE_VIDEO;
- av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
- return st;
-}
-
-static int flv_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int flv_read_header(AVFormatContext *s)
{
int offset, flags;
- url_fskip(s->pb, 4);
- flags = get_byte(s->pb);
+ avio_skip(s->pb, 4);
+ flags = avio_r8(s->pb);
/* old flvtool cleared this field */
/* FIXME: better fix needed */
if (!flags) {
s->ctx_flags |= AVFMTCTX_NOHEADER;
if(flags & FLV_HEADER_FLAG_HASVIDEO){
- if(!create_stream(s, 0))
+ if(!create_stream(s, AVMEDIA_TYPE_VIDEO))
return AVERROR(ENOMEM);
}
if(flags & FLV_HEADER_FLAG_HASAUDIO){
- if(!create_stream(s, 1))
+ if(!create_stream(s, AVMEDIA_TYPE_AUDIO))
return AVERROR(ENOMEM);
}
- offset = get_be32(s->pb);
- url_fseek(s->pb, offset, SEEK_SET);
+ 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)
+{
+ FLVContext *flv = s->priv_data;
+ av_freep(&flv->new_extradata[0]);
+ av_freep(&flv->new_extradata[1]);
+ return 0;
+}
+
static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
{
av_free(st->codec->extradata);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata_size = size;
- get_buffer(s->pb, st->codec->extradata, st->codec->extradata_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, is_audio;
int64_t next, pos;
int64_t dts, pts = AV_NOPTS_VALUE;
+ int sample_rate = 0, channels = 0;
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);
- dts = get_be24(s->pb);
- dts |= get_byte(s->pb) << 24;
-// av_log(s, AV_LOG_DEBUG, "type:%d, size:%d, dts:%d\n", type, size, dts);
- if (url_feof(s->pb))
+ 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 (s->pb->eof_reached)
return AVERROR_EOF;
- url_fskip(s->pb, 3); /* stream id, always 0 */
+ 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 + url_ftell(s->pb);
+ next= size + avio_tell(s->pb);
if (type == FLV_TAG_TYPE_AUDIO) {
is_audio=1;
- flags = get_byte(s->pb);
+ flags = avio_r8(s->pb);
size--;
} else if (type == FLV_TAG_TYPE_VIDEO) {
is_audio=0;
- flags = get_byte(s->pb);
+ flags = avio_r8(s->pb);
size--;
if ((flags & 0xf0) == 0x50) /* video info / command frame */
goto skip;
} else {
if (type == FLV_TAG_TYPE_META && size > 13+1+4)
- flv_read_metabody(s, next);
+ if (flv_read_metabody(s, next) > 0) {
+ return flv_data_packet(s, pkt, dts, next);
+ }
else /* skip packet */
- av_log(s, AV_LOG_ERROR, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
+ av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
skip:
- url_fseek(s->pb, next, SEEK_SET);
- return AVERROR(EAGAIN);
+ avio_seek(s->pb, next, SEEK_SET);
+ continue;
}
/* skip empty data packets */
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
- if (st->id == is_audio)
- break;
+ if (is_audio && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+ if (flv_same_audio_codec(st->codec, flags)) {
+ break;
+ }
+ } else
+ if (!is_audio && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if (flv_same_video_codec(st->codec, flags)) {
+ break;
+ }
+ }
}
if(i == s->nb_streams){
- av_log(s, AV_LOG_ERROR, "invalid stream\n");
- st= create_stream(s, is_audio);
+ st = create_stream(s,
+ is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO);
s->ctx_flags &= ~AVFMTCTX_NOHEADER;
}
-// av_log(s, AV_LOG_DEBUG, "%d %X %d \n", is_audio, flags, st->discard);
+ av_dlog(s, "%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);
- return AVERROR(EAGAIN);
+ 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);
}
// 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){
+ if(s->pb->seekable && (!s->duration || s->duration==AV_NOPTS_VALUE)){
int size;
- const int64_t pos= url_ftell(s->pb);
- const int64_t 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;
+ const int64_t pos= avio_tell(s->pb);
+ const int64_t fsize= avio_size(s->pb);
+ 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;
+ s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
}
- url_fseek(s->pb, pos, SEEK_SET);
+ avio_seek(s->pb, pos, SEEK_SET);
}
if(is_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 = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
- st->codec->sample_rate = (44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >> FLV_AUDIO_SAMPLERATE_OFFSET) >> 3);
- st->codec->bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
+ st->codec->channels = channels;
+ 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, flags & FLV_AUDIO_CODECID_MASK);
+ 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{
size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
}
- if (st->codec->codec_id == CODEC_ID_AAC ||
- st->codec->codec_id == CODEC_ID_H264) {
- int type = get_byte(s->pb);
+ if (st->codec->codec_id == AV_CODEC_ID_AAC ||
+ st->codec->codec_id == AV_CODEC_ID_H264) {
+ int type = avio_r8(s->pb);
size--;
- if (st->codec->codec_id == CODEC_ID_H264) {
- int32_t cts = (get_be24(s->pb)+0xff800000)^0xff800000; // sign extension
+ if (st->codec->codec_id == AV_CODEC_ID_H264) {
+ int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
pts = dts + cts;
if (cts < 0) { // dts are wrong
flv->wrong_dts = 1;
dts = AV_NOPTS_VALUE;
}
if (type == 0) {
+ if (st->codec->extradata) {
+ if ((ret = flv_queue_extradata(flv, s->pb, is_audio, 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 == CODEC_ID_AAC) {
+ if (st->codec->codec_id == AV_CODEC_ID_AAC) {
MPEG4AudioConfig cfg;
- ff_mpeg4audio_get_config(&cfg, st->codec->extradata,
- st->codec->extradata_size);
- if (cfg.chan_config > 7)
- return -1;
- st->codec->channels = ff_mpeg4audio_channels[cfg.chan_config];
- st->codec->sample_rate = cfg.sample_rate;
- dprintf(s, "mp4a config channels %d sample rate %d\n",
+ avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,
+ st->codec->extradata_size * 8, 1);
+ st->codec->channels = cfg.channels;
+ 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);
}
- return AVERROR(EAGAIN);
+ 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) {
+ if (ret < 0) {
return AVERROR(EIO);
}
/* note: we need to modify the packet size here to handle the last
pkt->dts = dts;
pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
pkt->stream_index = st->index;
+ if (flv->new_extradata[is_audio]) {
+ uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
+ flv->new_extradata_size[is_audio]);
+ 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;
+ }
+ }
+ if (is_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))
- pkt->flags |= PKT_FLAG_KEY;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+leave:
+ avio_skip(s->pb, 4);
return ret;
}
-AVInputFormat flv_demuxer = {
- "flv",
- NULL_IF_CONFIG_SMALL("FLV format"),
- sizeof(FLVContext),
- flv_probe,
- flv_read_header,
- flv_read_packet,
- .extensions = "flv",
- .value = CODEC_ID_FLV1,
+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, { 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,
};
projects / ffmpeg / blobdiff