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Diffstat (limited to 'libavformat/flvdec.c')
-rw-r--r--libavformat/flvdec.c159
1 files changed, 86 insertions, 73 deletions
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index d2f3f51d28..7efe156666 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 4bits: difference between encoded width and visible width
* - lower 4bits: 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
*/
@@ -34,10 +34,6 @@
#include "avio_internal.h"
#include "flv.h"
-#define KEYFRAMES_TAG "keyframes"
-#define KEYFRAMES_TIMESTAMP_TAG "times"
-#define KEYFRAMES_BYTEOFFSET_TAG "filepositions"
-
typedef struct {
int wrong_dts; ///< wrong dts due to negative cts
} FLVContext;
@@ -95,6 +91,7 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_co
AVCodecContext *vcodec = vstream->codec;
switch(flv_codecid) {
case FLV_CODECID_H263 : vcodec->codec_id = CODEC_ID_FLV1 ; break;
+ case FLV_CODECID_REALH263: vcodec->codec_id = CODEC_ID_H263 ; break; // Really mean it this time
case FLV_CODECID_SCREEN: vcodec->codec_id = CODEC_ID_FLASHSV; break;
case FLV_CODECID_SCREEN2: vcodec->codec_id = CODEC_ID_FLASHSV2; break;
case FLV_CODECID_VP6 : vcodec->codec_id = CODEC_ID_VP6F ;
@@ -110,6 +107,9 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_co
case FLV_CODECID_H264:
vcodec->codec_id = CODEC_ID_H264;
return 3; // not 4, reading packet type will consume one byte
+ case FLV_CODECID_MPEG4:
+ vcodec->codec_id = CODEC_ID_MPEG4;
+ return 3;
default:
av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
vcodec->codec_tag = flv_codecid;
@@ -133,8 +133,7 @@ static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize) {
}
static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream *vstream, int64_t max_pos) {
- 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;
@@ -154,42 +153,35 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream
}
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;
- }
- 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
+ if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times){
+ current_array= &times;
+ 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 finish;
- num_val = av_int2dbl(avio_rb64(ioc));
- current_array[i] = num_val;
+ current_array[0][i] = av_int2dbl(avio_rb64(ioc));
}
if (times && filepositions) {
// All done, exiting at a position allowing amf_parse_object
@@ -199,19 +191,16 @@ static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, AVStream
}
}
- if (!ret && timeslen == fileposlen)
- for (i = 0; i < fileposlen; i++)
+ if (timeslen == fileposlen) {
+ for(i = 0; i < timeslen; i++)
av_add_index_entry(vstream, filepositions[i], times[i]*1000, 0, 0, AVINDEX_KEYFRAME);
- else
+ } else
av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
finish:
av_freep(&times);
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;
}
@@ -239,9 +228,9 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
case AMF_DATA_TYPE_OBJECT: {
unsigned int keylen;
- if (key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
+ if (ioc->seekable && key && !strcmp(KEYFRAMES_TAG, key) && depth == 1)
if (parse_keyframes_index(s, ioc, vstream, max_pos) < 0)
- return -1;
+ av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
while(avio_tell(ioc) < max_pos - 2 && (keylen = avio_rb16(ioc))) {
avio_skip(ioc, keylen); //skip key string
@@ -316,6 +305,10 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
} 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_OBJECT){
+ if(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
+ }
} else if (amf_type == AMF_DATA_TYPE_STRING)
av_dict_set(&s->metadata, key, str_val, 0);
}
@@ -325,13 +318,12 @@ static int amf_parse_object(AVFormatContext *s, AVStream *astream, AVStream *vst
static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
AMFDataType type;
- AVStream *stream, *astream, *vstream;
+ 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.
- astream = NULL;
- vstream = NULL;
+ vstream = astream = dstream = NULL;
ioc = s->pb;
//first object needs to be "onMetaData" string
@@ -342,8 +334,9 @@ static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
//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_AUDIO) astream = stream;
- else if(stream->codec->codec_type == AVMEDIA_TYPE_VIDEO) vstream = stream;
+ 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_VIDEO) dstream = stream;
}
//parse the second object (we want a mixed array)
@@ -353,11 +346,18 @@ static int flv_read_metabody(AVFormatContext *s, int64_t next_pos) {
return 0;
}
-static AVStream *create_stream(AVFormatContext *s, int is_audio){
- AVStream *st = av_new_stream(s, is_audio);
+static AVStream *create_stream(AVFormatContext *s, int stream_type){
+ AVStream *st = av_new_stream(s, stream_type);
if (!st)
return NULL;
- st->codec->codec_type = is_audio ? AVMEDIA_TYPE_AUDIO : AVMEDIA_TYPE_VIDEO;
+ switch(stream_type) {
+ case FLV_STREAM_TYPE_VIDEO: st->codec->codec_type = AVMEDIA_TYPE_VIDEO; break;
+ case FLV_STREAM_TYPE_AUDIO: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; break;
+ case FLV_STREAM_TYPE_DATA:
+ st->codec->codec_type = AVMEDIA_TYPE_DATA;
+ st->codec->codec_id = CODEC_ID_NONE; // Going to rely on copy for now
+ av_log(s, AV_LOG_DEBUG, "Data stream created\n");
+ }
av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
return st;
}
@@ -381,13 +381,15 @@ static int flv_read_header(AVFormatContext *s,
s->ctx_flags |= AVFMTCTX_NOHEADER;
if(flags & FLV_HEADER_FLAG_HASVIDEO){
- if(!create_stream(s, 0))
+ if(!create_stream(s, FLV_STREAM_TYPE_VIDEO))
return AVERROR(ENOMEM);
}
if(flags & FLV_HEADER_FLAG_HASAUDIO){
- if(!create_stream(s, 1))
+ if(!create_stream(s, FLV_STREAM_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);
@@ -412,7 +414,8 @@ static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
FLVContext *flv = s->priv_data;
- int ret, i, type, size, flags, is_audio;
+ int ret, i, type, size, flags;
+ int stream_type=-1;
int64_t next, pos;
int64_t dts, pts = AV_NOPTS_VALUE;
AVStream *st = NULL;
@@ -424,7 +427,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
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)
+ if (url_feof(s->pb))
return AVERROR_EOF;
avio_skip(s->pb, 3); /* stream id, always 0 */
flags = 0;
@@ -435,20 +438,26 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
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 */
goto skip;
- } else {
- if (type == FLV_TAG_TYPE_META && size > 13+1+4)
+ } else if (type == FLV_TAG_TYPE_META) {
+ if (size > 13+1+4 && dts == 0) { // Header-type metadata stuff
flv_read_metabody(s, next);
- else /* skip packet */
- av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
+ 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;
@@ -461,17 +470,17 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
- if (st->id == is_audio)
+ if (st->id == stream_type)
break;
}
if(i == s->nb_streams){
- av_log(s, AV_LOG_ERROR, "invalid stream\n");
- st= create_stream(s, is_audio);
+ av_log(s, AV_LOG_WARNING, "Stream discovered after head already parsed\n");
+ st= create_stream(s, stream_type);
s->ctx_flags &= ~AVFMTCTX_NOHEADER;
}
- 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))
+ 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);
@@ -498,7 +507,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
avio_seek(s->pb, pos, SEEK_SET);
}
- if(is_audio){
+ if(stream_type == FLV_STREAM_TYPE_AUDIO){
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);
@@ -507,15 +516,16 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
if(!st->codec->codec_id){
flv_set_audio_codec(s, st, flags & FLV_AUDIO_CODECID_MASK);
}
- }else{
+ } else if(stream_type == FLV_STREAM_TYPE_VIDEO) {
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) {
+ st->codec->codec_id == CODEC_ID_H264 ||
+ st->codec->codec_id == CODEC_ID_MPEG4) {
int type = avio_r8(s->pb);
size--;
- if (st->codec->codec_id == CODEC_ID_H264) {
+ if (st->codec->codec_id == CODEC_ID_H264 || st->codec->codec_id == CODEC_ID_MPEG4) {
int32_t cts = (avio_rb24(s->pb)+0xff800000)^0xff800000; // sign extension
pts = dts + cts;
if (cts < 0) { // dts are wrong
@@ -525,7 +535,8 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
if (flv->wrong_dts)
dts = AV_NOPTS_VALUE;
}
- if (type == 0) {
+
+ if (type == 0 && !st->codec->extradata) {
if ((ret = flv_get_extradata(s, st, size)) < 0)
return ret;
if (st->codec->codec_id == CODEC_ID_AAC) {
@@ -563,7 +574,9 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
pkt->stream_index = st->index;
- 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:
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 21:51:17 +0000