static int adx_read_header(AVFormatContext *s)
{
ADXDemuxerContext *c = s->priv_data;
AVCodecContext *avctx;
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avctx = s->streams[0]->codec;
if (avio_rb16(s->pb) != 0x8000)
return AVERROR_INVALIDDATA;
c->header_size = avio_rb16(s->pb) + 4;
avio_seek(s->pb, -4, SEEK_CUR);
if (ff_get_extradata(avctx, s->pb, c->header_size) < 0)
return AVERROR(ENOMEM);
if (avctx->extradata_size < 12) {
av_log(s, AV_LOG_ERROR, "Invalid extradata size.\n");
return AVERROR_INVALIDDATA;
}
avctx->sample_rate = AV_RB32(avctx->extradata + 8);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = s->iformat->raw_codec_id;
avpriv_set_pts_info(st, 64, BLOCK_SAMPLES, avctx->sample_rate);
return 0;
}
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, size, pts, type;
retry:
type = avio_rb16(s->pb); // 257 or 258
size = avio_rb16(s->pb);
avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
avio_rb16(s->pb); //packet number
pts = avio_rb32(s->pb);
avio_rb32(s->pb); //6A 13 E3 88
size -= 12;
if(size < 1)
return -1;
if(type == 258)
{
avio_skip(s->pb, size);
goto retry;
}
ret = av_get_packet(s->pb, pkt, size);
pkt->pts = pts;
pkt->pos -= 16;
pkt->stream_index = 0;
return ret;
}
static int cdata_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
CdataDemuxContext *cdata = s->priv_data;
AVIOContext *pb = s->pb;
unsigned int sample_rate, header;
AVStream *st;
header = avio_rb16(pb);
switch (header) {
case 0x0400: cdata->channels = 1; break;
case 0x0404: cdata->channels = 2; break;
case 0x040C: cdata->channels = 4; break;
default:
av_log(s, AV_LOG_INFO, "unknown header 0x%04x\n", header);
return -1;
};
sample_rate = avio_rb16(pb);
avio_skip(pb, 12);
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->codec_id = CODEC_ID_ADPCM_EA_XAS;
st->codec->channels = cdata->channels;
st->codec->sample_rate = sample_rate;
av_set_pts_info(st, 64, 1, sample_rate);
cdata->audio_pts = 0;
return 0;
}
int
ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
AVStream *st, RMStream *rst, int codec_data_size)
{
unsigned int v;
int size;
int64_t codec_pos;
int ret;
avpriv_set_pts_info(st, 64, 1, 1000);
codec_pos = avio_tell(pb);
v = avio_rb32(pb);
if (v == MKTAG(0xfd, 'a', 'r', '.')) {
/* ra type header */
if (rm_read_audio_stream_info(s, pb, st, rst, 0))
return -1;
} else if (v == MKBETAG('L', 'S', 'D', ':')) {
avio_seek(pb, -4, SEEK_CUR);
if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
return ret;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = AV_RL32(st->codec->extradata);
st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
st->codec->codec_tag);
} else {
int fps;
if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
fail1:
av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
goto skip;
}
st->codec->codec_tag = avio_rl32(pb);
st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
st->codec->codec_tag);
av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
if (st->codec->codec_id == AV_CODEC_ID_NONE)
goto fail1;
st->codec->width = avio_rb16(pb);
st->codec->height = avio_rb16(pb);
avio_skip(pb, 2); // looks like bits per sample
avio_skip(pb, 4); // always zero?
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
fps = avio_rb32(pb);
if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
return ret;
av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
0x10000, fps, (1 << 30) - 1);
}
skip:
/* skip codec info */
size = avio_tell(pb) - codec_pos;
avio_skip(pb, codec_data_size - size);
return 0;
}
static int r3d_read_red1(AVFormatContext *s)
{
AVStream *st = av_new_stream(s, 0);
char filename[258];
int tmp;
int av_unused tmp2;
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_JPEG2000;
tmp = avio_r8(s->pb); // major version
tmp2 = avio_r8(s->pb); // minor version
av_dlog(s, "version %d.%d\n", tmp, tmp2);
tmp = avio_rb16(s->pb); // unknown
av_dlog(s, "unknown1 %d\n", tmp);
tmp = avio_rb32(s->pb);
av_set_pts_info(st, 32, 1, tmp);
tmp = avio_rb32(s->pb); // filenum
av_dlog(s, "filenum %d\n", tmp);
avio_skip(s->pb, 32); // unknown
st->codec->width = avio_rb32(s->pb);
st->codec->height = avio_rb32(s->pb);
tmp = avio_rb16(s->pb); // unknown
av_dlog(s, "unknown2 %d\n", tmp);
st->codec->time_base.den = avio_rb16(s->pb);
st->codec->time_base.num = avio_rb16(s->pb);
tmp = avio_r8(s->pb); // audio channels
av_dlog(s, "audio channels %d\n", tmp);
if (tmp > 0) {
AVStream *ast = av_new_stream(s, 1);
if (!ast)
return AVERROR(ENOMEM);
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ast->codec->codec_id = CODEC_ID_PCM_S32BE;
ast->codec->channels = tmp;
av_set_pts_info(ast, 32, 1, st->time_base.den);
}
avio_read(s->pb, filename, 257);
filename[sizeof(filename)-1] = 0;
av_dict_set(&st->metadata, "filename", filename, 0);
av_dlog(s, "filename %s\n", filename);
av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
av_dlog(s, "timescale %d\n", st->time_base.den);
av_dlog(s, "frame rate %d/%d\n",
st->codec->time_base.num, st->codec->time_base.den);
return 0;
}
/**
* Audio frame with a minimal header
*/
static int adbinary_audio_minimal(AVFormatContext *s,
AVPacket *pkt, int size,
struct NetVuAudioData *data)
{
AVIOContext *pb = s->pb;
int dataSize = size - (4 + 2 + 2);
int status;
// Get the minimal audio header and copy into generic audio data structure
memset(data, 0, sizeof(struct NetVuAudioData));
data->seconds = avio_rb32(pb);
data->msecs = avio_rb16(pb);
data->mode = avio_rb16(pb);
if ( pb->error || (data->seconds == 0) ) {
av_log(s, AV_LOG_ERROR, "%s: Reading header, errorcode %d\n",
__func__, pb->error);
return ADFFMPEG_AD_ERROR_MINIMAL_AUDIO_ADPCM_GET_BUFFER;
}
// Now get the main frame data into a new packet
status = av_get_packet(pb, pkt, dataSize);
if (status < 0) {
av_log(s, AV_LOG_ERROR, "%s: av_get_packet (size %d) failed, status %d\n",
__func__, data->sizeOfAudioData, status);
return ADFFMPEG_AD_ERROR_MINIMAL_AUDIO_ADPCM_NEW_PACKET;
}
audiodata_network2host(pkt->data, pkt->data, dataSize);
return status;
}
static int r3d_read_red1(AVFormatContext *s)
{
AVStream *st = avformat_new_stream(s, NULL);
R3DContext *r3d = s->priv_data;
char filename[258];
int tmp;
int av_unused tmp2;
AVRational framerate;
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_JPEG2000;
tmp = avio_r8(s->pb); // major version
tmp2 = avio_r8(s->pb); // minor version
av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
tmp = avio_rb32(s->pb);
avpriv_set_pts_info(st, 32, 1, tmp);
tmp = avio_rb32(s->pb); // filenum
av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
avio_skip(s->pb, 32); // unknown
st->codec->width = avio_rb32(s->pb);
st->codec->height = avio_rb32(s->pb);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
framerate.num = avio_rb16(s->pb);
framerate.den = avio_rb16(s->pb);
if (framerate.num > 0 && framerate.den > 0) {
#if FF_API_R_FRAME_RATE
st->r_frame_rate =
#endif
st->avg_frame_rate = framerate;
}
r3d->audio_channels = avio_r8(s->pb); // audio channels
av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
avio_read(s->pb, filename, 257);
filename[sizeof(filename)-1] = 0;
av_dict_set(&st->metadata, "filename", filename, 0);
av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codec->width, st->codec->height);
av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
framerate.num, framerate.den);
return 0;
}
static int
rdt_load_mdpr (PayloadContext *rdt, AVStream *st, int rule_nr)
{
AVIOContext pb;
int size;
uint32_t tag;
/**
* Layout of the MLTI chunk:
* 4: MLTI
* 2: number of streams
* Then for each stream ([number_of_streams] times):
* 2: mdpr index
* 2: number of mdpr chunks
* Then for each mdpr chunk ([number_of_mdpr_chunks] times):
* 4: size
* [size]: data
* we skip MDPR chunks until we reach the one of the stream
* we're interested in, and forward that ([size]+[data]) to
* the RM demuxer to parse the stream-specific header data.
*/
if (!rdt->mlti_data)
return -1;
ffio_init_context(&pb, rdt->mlti_data, rdt->mlti_data_size, 0,
NULL, NULL, NULL, NULL);
tag = avio_rl32(&pb);
if (tag == MKTAG('M', 'L', 'T', 'I'))
{
int num, chunk_nr;
/* read index of MDPR chunk numbers */
num = avio_rb16(&pb);
if (rule_nr < 0 || rule_nr >= num)
return -1;
avio_skip(&pb, rule_nr * 2);
chunk_nr = avio_rb16(&pb);
avio_skip(&pb, (num - 1 - rule_nr) * 2);
/* read MDPR chunks */
num = avio_rb16(&pb);
if (chunk_nr >= num)
return -1;
while (chunk_nr--)
avio_skip(&pb, avio_rb32(&pb));
size = avio_rb32(&pb);
}
else
{
size = rdt->mlti_data_size;
avio_seek(&pb, 0, SEEK_SET);
}
if (ff_rm_read_mdpr_codecdata(rdt->rmctx, &pb, st, rdt->rmst[st->index], size) < 0)
return -1;
return 0;
}
static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
AVIOContext *pb = s->pb;
int ret, size;
if (url_feof(pb))
return AVERROR(EIO);
size = avio_rb16(pb);
avio_rb16(pb); // unknown
ret = av_get_packet(pb, pkt, size);
pkt->stream_index = 0;
return ret;
}
static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
{
AVStream *st = s->streams[0];
int tmp;
int av_unused tmp2;
int64_t pos = avio_tell(s->pb);
unsigned dts;
int ret;
dts = avio_rb32(s->pb);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
tmp = avio_r8(s->pb); // major version
tmp2 = avio_r8(s->pb); // minor version
av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
if (tmp > 4) {
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
tmp = avio_rb16(s->pb); // unknown
av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
tmp = avio_rb32(s->pb);
av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
}
tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
if (tmp < 0)
return -1;
ret = av_get_packet(s->pb, pkt, tmp);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "error reading video packet\n");
return -1;
}
pkt->stream_index = 0;
pkt->dts = dts;
if (st->avg_frame_rate.num)
pkt->duration = (uint64_t)st->time_base.den*
st->avg_frame_rate.den/st->avg_frame_rate.num;
av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
return 0;
}
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, size, pts, type, flags;
int first_pkt = 0;
int frame_complete = 0;
while (!frame_complete) {
type = avio_rb16(s->pb); // 257 or 258
size = avio_rb16(s->pb);
flags = avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
avio_rb16(s->pb); //packet number
pts = avio_rb32(s->pb);
avio_rb32(s->pb); //6A 13 E3 88
frame_complete = flags & 0x80;
size -= 12;
if (size < 1)
return -1;
if (type == 258) {
avio_skip(s->pb, size);
frame_complete = 0;
continue;
}
if (!first_pkt) {
ret = av_get_packet(s->pb, pkt, size);
if (ret < 0)
return ret;
first_pkt = 1;
pkt->pts = pts;
pkt->pos -= 16;
} else {
ret = av_append_packet(s->pb, pkt, size);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "failed to grow packet\n");
av_free_packet(pkt);
return ret;
}
}
if (ret < size) {
av_log(s, AV_LOG_ERROR, "Truncated packet! Read %d of %d bytes\n",
ret, size);
pkt->flags |= AV_PKT_FLAG_CORRUPT;
break;
}
}
pkt->stream_index = 0;
return 0;
}
static int avr_read_header(AVFormatContext *s)
{
uint16_t chan, sign, bps;
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
avio_skip(s->pb, 4); // magic
avio_skip(s->pb, 8); // sample_name
chan = avio_rb16(s->pb);
if (!chan) {
st->codecpar->channels = 1;
} else if (chan == 0xFFFFu) {
st->codecpar->channels = 2;
} else {
avpriv_request_sample(s, "chan %d", chan);
return AVERROR_PATCHWELCOME;
}
st->codecpar->bits_per_coded_sample = bps = avio_rb16(s->pb);
sign = avio_rb16(s->pb);
avio_skip(s->pb, 2); // loop
avio_skip(s->pb, 2); // midi
avio_skip(s->pb, 1); // replay speed
st->codecpar->sample_rate = avio_rb24(s->pb);
avio_skip(s->pb, 4 * 3);
avio_skip(s->pb, 2 * 3);
avio_skip(s->pb, 20);
avio_skip(s->pb, 64);
st->codecpar->codec_id = ff_get_pcm_codec_id(bps, 0, 1, sign);
if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
avpriv_request_sample(s, "Bps %d and sign %d", bps, sign);
return AVERROR_PATCHWELCOME;
}
st->codecpar->block_align = bps * st->codecpar->channels / 8;
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
return 0;
}
static int get_num(AVIOContext *pb, int *len)
{
int n, n1;
n = avio_rb16(pb);
(*len)-=2;
n &= 0x7FFF;
if (n >= 0x4000) {
return n - 0x4000;
} else {
n1 = avio_rb16(pb);
(*len)-=2;
return (n << 16) | n1;
}
}
void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)
{
int flags;
if (es_id) *es_id = avio_rb16(pb);
else avio_rb16(pb);
flags = avio_r8(pb);
if (flags & 0x80) //streamDependenceFlag
avio_rb16(pb);
if (flags & 0x40) { //URL_Flag
int len = avio_r8(pb);
avio_skip(pb, len);
}
if (flags & 0x20) //OCRstreamFlag
avio_rb16(pb);
}
static int sup_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int64_t pts, dts, pos;
int ret;
pos = avio_tell(s->pb);
if (avio_rb16(s->pb) != SUP_PGS_MAGIC)
return avio_feof(s->pb) ? AVERROR_EOF : AVERROR_INVALIDDATA;
pts = avio_rb32(s->pb);
dts = avio_rb32(s->pb);
if ((ret = av_get_packet(s->pb, pkt, 3)) < 0)
return ret;
pkt->stream_index = 0;
pkt->flags |= AV_PKT_FLAG_KEY;
pkt->pos = pos;
pkt->pts = pts;
// Many files have DTS set to 0 for all packets, so assume 0 means unset.
pkt->dts = dts ? dts : AV_NOPTS_VALUE;
if (pkt->size >= 3) {
// The full packet size is stored as part of the packet.
size_t len = AV_RB16(pkt->data + 1);
if ((ret = av_append_packet(s->pb, pkt, len)) < 0)
return ret;
}
return 0;
}
static int sds_read_packet(AVFormatContext *ctx, AVPacket *pkt)
{
SDSContext *s = ctx->priv_data;
AVIOContext *pb = ctx->pb;
int64_t pos;
int ret;
if (avio_feof(pb))
return AVERROR_EOF;
pos = avio_tell(pb);
if (avio_rb16(pb) != 0xF07E)
return AVERROR_INVALIDDATA;
avio_skip(pb, 3);
ret = av_new_packet(pkt, s->size);
if (ret < 0)
return ret;
ret = avio_read(pb, s->data, 120);
s->read_block(s->data, (uint32_t *)pkt->data);
avio_skip(pb, 1); // checksum
if (avio_r8(pb) != 0xF7)
return AVERROR_INVALIDDATA;
pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
pkt->stream_index = 0;
pkt->pos = pos;
return ret;
}
static int cdata_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
CdataDemuxContext *cdata = s->priv_data;
AVIOContext *pb = s->pb;
unsigned int sample_rate, header;
AVStream *st;
int64_t channel_layout = 0;
header = avio_rb16(pb);
switch (header) {
case 0x0400:
cdata->channels = 1;
break;
case 0x0404:
cdata->channels = 2;
break;
case 0x040C:
cdata->channels = 4;
channel_layout = AV_CH_LAYOUT_QUAD;
break;
case 0x0414:
cdata->channels = 6;
channel_layout = AV_CH_LAYOUT_5POINT1_BACK;
break;
default:
av_log(s, AV_LOG_INFO, "unknown header 0x%04x\n", header);
return -1;
};
sample_rate = avio_rb16(pb);
avio_skip(pb, (avio_r8(pb) & 0x20) ? 15 : 11);
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->codec_id = CODEC_ID_ADPCM_EA_XAS;
st->codec->channels = cdata->channels;
st->codec->channel_layout = channel_layout;
st->codec->sample_rate = sample_rate;
st->codec->sample_fmt = AV_SAMPLE_FMT_S16;
av_set_pts_info(st, 64, 1, sample_rate);
cdata->audio_pts = 0;
return 0;
}
static av_always_inline unsigned int read16(AVFormatContext *s)
{
BRSTMDemuxContext *b = s->priv_data;
if (b->little_endian)
return avio_rl16(s->pb);
else
return avio_rb16(s->pb);
}
static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, const char *key)
{
char *q, dst[512];
const char *val = NULL;
int len, dstlen = sizeof(dst) - 1;
unsigned genre;
unsigned int (*get)(AVIOContext*) = avio_rb16;
dst[0] = 0;
if (taglen < 1)
return;
taglen--; /* account for encoding type byte */
switch (avio_r8(pb)) { /* encoding type */
case ID3v2_ENCODING_ISO8859:
q = dst;
while (taglen-- && q - dst < dstlen - 7) {
uint8_t tmp;
PUT_UTF8(avio_r8(pb), tmp, *q++ = tmp;)
}
*q = 0;
break;
case ID3v2_ENCODING_UTF16BOM:
taglen -= 2;
switch (avio_rb16(pb)) {
case 0xfffe:
get = avio_rl16;
case 0xfeff:
break;
default:
av_log(s, AV_LOG_ERROR, "Incorrect BOM value in tag %s.\n", key);
return;
}
// fall-through
case ID3v2_ENCODING_UTF16BE:
q = dst;
while (taglen > 1 && q - dst < dstlen - 7) {
uint32_t ch;
uint8_t tmp;
GET_UTF16(ch, ((taglen -= 2) >= 0 ? get(pb) : 0), break;)
PUT_UTF8(ch, tmp, *q++ = tmp;)
}
*q = 0;
break;
case ID3v2_ENCODING_UTF8:
len = FFMIN(taglen, dstlen);
avio_read(pb, dst, len);
dst[len] = 0;
break;
default:
av_log(s, AV_LOG_WARNING, "Unknown encoding in tag %s.\n", key);
}
/**
* Try to find Xing/Info/VBRI tags and compute duration from info therein
*/
static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
{
uint32_t v, spf;
unsigned frames = 0; /* Total number of frames in file */
unsigned size = 0; /* Total number of bytes in the stream */
const int64_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
MPADecodeHeader c;
int vbrtag_size = 0;
v = avio_rb32(s->pb);
if(ff_mpa_check_header(v) < 0)
return -1;
if (avpriv_mpegaudio_decode_header(&c, v) == 0)
vbrtag_size = c.frame_size;
if(c.layer != 3)
return -1;
/* Check for Xing / Info tag */
avio_skip(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1]);
v = avio_rb32(s->pb);
if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) {
v = avio_rb32(s->pb);
if(v & 0x1)
frames = avio_rb32(s->pb);
if(v & 0x2)
size = avio_rb32(s->pb);
}
/* Check for VBRI tag (always 32 bytes after end of mpegaudio header) */
avio_seek(s->pb, base + 4 + 32, SEEK_SET);
v = avio_rb32(s->pb);
if(v == MKBETAG('V', 'B', 'R', 'I')) {
/* Check tag version */
if(avio_rb16(s->pb) == 1) {
/* skip delay and quality */
avio_skip(s->pb, 4);
size = avio_rb32(s->pb);
frames = avio_rb32(s->pb);
}
}
if(!frames && !size)
return -1;
/* Skip the vbr tag frame */
avio_seek(s->pb, base + vbrtag_size, SEEK_SET);
spf = c.lsf ? 576 : 1152; /* Samples per frame, layer 3 */
if(frames)
st->duration = av_rescale_q(frames, (AVRational){spf, c.sample_rate},
st->time_base);
if(size && frames)
st->codec->bit_rate = av_rescale(size, 8 * c.sample_rate, frames * (int64_t)spf);
return 0;
}
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->id == 2)
break;
}
if (i == s->nb_streams) {
st = create_stream(s, 2, AVMEDIA_TYPE_DATA);
if (!st)
goto out;
st->codec->codec_id = 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 rso_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
int id, rate, bps;
unsigned int size;
enum AVCodecID codec;
AVStream *st;
id = avio_rb16(pb);
size = avio_rb16(pb);
rate = avio_rb16(pb);
avio_rb16(pb); /* play mode ? (0x0000 = don't loop) */
codec = ff_codec_get_id(ff_codec_rso_tags, id);
if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) {
av_log(s, AV_LOG_ERROR, "ADPCM in RSO not implemented\n");
return AVERROR_PATCHWELCOME;
}
bps = av_get_bits_per_sample(codec);
if (!bps) {
av_log_ask_for_sample(s, "could not determine bits per sample\n");
return AVERROR_INVALIDDATA;
}
/* now we are ready: build format streams */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->duration = (size * 8) / bps;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = id;
st->codec->codec_id = codec;
st->codec->channels = 1;
st->codec->channel_layout = AV_CH_LAYOUT_MONO;
st->codec->sample_rate = rate;
avpriv_set_pts_info(st, 64, 1, rate);
return 0;
}
static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
{
char buf[1024];
int i;
for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
int len = wide ? avio_rb16(pb) : avio_r8(pb);
get_strl(pb, buf, sizeof(buf), len);
av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
}
}
static int adx_read_header(AVFormatContext *s)
{
ADXDemuxerContext *c = s->priv_data;
AVCodecParameters *par;
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
par = s->streams[0]->codecpar;
if (avio_rb16(s->pb) != 0x8000)
return AVERROR_INVALIDDATA;
c->header_size = avio_rb16(s->pb) + 4;
avio_seek(s->pb, -4, SEEK_CUR);
if (ff_get_extradata(s, par, s->pb, c->header_size) < 0)
return AVERROR(ENOMEM);
if (par->extradata_size < 12) {
av_log(s, AV_LOG_ERROR, "Invalid extradata size.\n");
return AVERROR_INVALIDDATA;
}
par->channels = AV_RB8 (par->extradata + 7);
par->sample_rate = AV_RB32(par->extradata + 8);
if (par->channels <= 0) {
av_log(s, AV_LOG_ERROR, "invalid number of channels %d\n", par->channels);
return AVERROR_INVALIDDATA;
}
if (par->sample_rate <= 0) {
av_log(s, AV_LOG_ERROR, "Invalid sample rate %d\n", par->sample_rate);
return AVERROR_INVALIDDATA;
}
par->codec_type = AVMEDIA_TYPE_AUDIO;
par->codec_id = s->iformat->raw_codec_id;
par->bit_rate = par->sample_rate * par->channels * BLOCK_SIZE * 8LL / BLOCK_SAMPLES;
avpriv_set_pts_info(st, 64, BLOCK_SAMPLES, par->sample_rate);
return 0;
}
static int lmlm4_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
int ret;
unsigned int frame_type, packet_size, padding, frame_size;
avio_rb16(pb); /* channel number */
frame_type = avio_rb16(pb);
packet_size = avio_rb32(pb);
padding = -packet_size & 511;
frame_size = packet_size - 8;
if (frame_type > LMLM4_MPEG1L2 || frame_type == LMLM4_INVALID)
{
av_log(s, AV_LOG_ERROR, "invalid or unsupported frame_type\n");
return AVERROR(EIO);
}
if (packet_size > LMLM4_MAX_PACKET_SIZE)
{
av_log(s, AV_LOG_ERROR, "packet size exceeds maximum\n");
return AVERROR(EIO);
}
if ((ret = av_get_packet(pb, pkt, frame_size)) <= 0)
return AVERROR(EIO);
avio_skip(pb, padding);
switch (frame_type)
{
case LMLM4_I_FRAME:
pkt->flags = AV_PKT_FLAG_KEY;
case LMLM4_P_FRAME:
case LMLM4_B_FRAME:
pkt->stream_index = 0;
break;
case LMLM4_MPEG1L2:
pkt->stream_index = 1;
break;
}
return ret;
}
/** this function assumes that the demuxer has already seeked to the start
* of the INDX chunk, and will bail out if not. */
static int rm_read_index(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
AVStream *st;
do {
if (avio_rl32(pb) != MKTAG('I','N','D','X'))
return -1;
size = avio_rb32(pb);
if (size < 20)
return -1;
avio_skip(pb, 2);
n_pkts = avio_rb32(pb);
str_id = avio_rb16(pb);
next_off = avio_rb32(pb);
for (n = 0; n < s->nb_streams; n++)
if (s->streams[n]->id == str_id) {
st = s->streams[n];
break;
}
if (n == s->nb_streams) {
av_log(s, AV_LOG_ERROR,
"Invalid stream index %d for index at pos %"PRId64"\n",
str_id, avio_tell(pb));
goto skip;
} else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
av_log(s, AV_LOG_ERROR,
"Nr. of packets in packet index for stream index %d "
"exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
str_id, avio_size(pb), avio_tell(pb),
(avio_size(pb) - avio_tell(pb)) / 14);
goto skip;
}
for (n = 0; n < n_pkts; n++) {
avio_skip(pb, 2);
pts = avio_rb32(pb);
pos = avio_rb32(pb);
avio_skip(pb, 4); /* packet no. */
av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
}
skip:
if (next_off && avio_tell(pb) < next_off &&
avio_seek(pb, next_off, SEEK_SET) < 0) {
av_log(s, AV_LOG_ERROR,
"Non-linear index detected, not supported\n");
return -1;
}
} while (next_off);
return 0;
}
static int read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
FilmstripDemuxContext *film = s->priv_data;
AVIOContext *pb = s->pb;
AVStream *st;
if (!s->pb->seekable)
return AVERROR(EIO);
avio_seek(pb, avio_size(pb) - 36, SEEK_SET);
if (avio_rb32(pb) != RAND_TAG)
{
av_log(s, AV_LOG_ERROR, "magic number not found");
return AVERROR_INVALIDDATA;
}
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->nb_frames = avio_rb32(pb);
if (avio_rb16(pb) != 0)
{
av_log_ask_for_sample(s, "unsupported packing method\n");
return AVERROR_INVALIDDATA;
}
avio_skip(pb, 2);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_RAWVIDEO;
st->codec->pix_fmt = PIX_FMT_RGBA;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = avio_rb16(pb);
st->codec->height = avio_rb16(pb);
film->leading = avio_rb16(pb);
av_set_pts_info(st, 64, 1, avio_rb16(pb));
avio_seek(pb, 0, SEEK_SET);
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 ast_read_header(AVFormatContext *s)
{
int depth;
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(s->pb, 8);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = ff_codec_get_id(ff_codec_ast_tags, avio_rb16(s->pb));
depth = avio_rb16(s->pb);
if (depth != 16) {
avpriv_request_sample(s, "depth %d", depth);
return AVERROR_INVALIDDATA;
}
st->codec->channels = avio_rb16(s->pb);
if (!st->codec->channels)
return AVERROR_INVALIDDATA;
if (st->codec->channels == 2)
st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
else if (st->codec->channels == 4)
st->codec->channel_layout = AV_CH_LAYOUT_4POINT0;
avio_skip(s->pb, 2);
st->codec->sample_rate = avio_rb32(s->pb);
if (st->codec->sample_rate <= 0)
return AVERROR_INVALIDDATA;
st->start_time = 0;
st->duration = avio_rb32(s->pb);
avio_skip(s->pb, 40);
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
return 0;
}
/**
* Decode characters to UTF-8 according to encoding type. The decoded buffer is
* always null terminated. Stop reading when either *maxread bytes are read from
* pb or U+0000 character is found.
*
* @param dst Pointer where the address of the buffer with the decoded bytes is
* stored. Buffer must be freed by caller.
* @param maxread Pointer to maximum number of characters to read from the
* AVIOContext. After execution the value is decremented by the number of bytes
* actually read.
* @returns 0 if no error occurred, dst is uninitialized on error
*/
static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
uint8_t **dst, int *maxread)
{
int ret;
uint8_t tmp;
uint32_t ch = 1;
int left = *maxread;
unsigned int (*get)(AVIOContext*) = avio_rb16;
AVIOContext *dynbuf;
if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
return ret;
}
switch (encoding) {
case ID3v2_ENCODING_ISO8859:
while (left && ch) {
ch = avio_r8(pb);
PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
left--;
}
break;
case ID3v2_ENCODING_UTF16BOM:
if ((left -= 2) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n");
avio_close_dyn_buf(dynbuf, dst);
av_freep(dst);
return AVERROR_INVALIDDATA;
}
switch (avio_rb16(pb)) {
case 0xfffe:
get = avio_rl16;
case 0xfeff:
break;
default:
av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
avio_close_dyn_buf(dynbuf, dst);
av_freep(dst);
*maxread = left;
return AVERROR_INVALIDDATA;
}
// fall-through
case ID3v2_ENCODING_UTF16BE:
while ((left > 1) && ch) {
GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
}