static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx)
{
offset_t pos = url_ftell(pb);
gxf_write_packet_header(pb, PKT_UMF);
/* preamble */
put_byte(pb, 3); /* first and last (only) packet */
put_be32(pb, ctx->umf_length); /* data length */
ctx->umf_start_offset = url_ftell(pb);
gxf_write_umf_payload(pb, ctx);
gxf_write_umf_material_description(pb, ctx);
ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx);
ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx);
ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx);
ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset;
return updatePacketSize(pb, pos);
}
static int gxf_write_umf_track_description(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
GXFContext *gxf = s->priv_data;
int64_t pos = url_ftell(pb);
int i;
gxf->umf_track_offset = pos - gxf->umf_start_offset;
for (i = 0; i < s->nb_streams; ++i) {
GXFStreamContext *sc = s->streams[i]->priv_data;
avio_wl16(pb, sc->media_info);
avio_wl16(pb, 1);
}
avio_wl16(pb, gxf->timecode_track.media_info);
avio_wl16(pb, 1);
return url_ftell(pb) - pos;
}
static int64_t updateSize(AVIOContext *pb, int64_t pos)
{
int64_t curpos;
curpos = url_ftell(pb);
avio_seek(pb, pos, SEEK_SET);
avio_wb16(pb, curpos - pos - 2);
avio_seek(pb, curpos, SEEK_SET);
return curpos - pos;
}
static offset_t updateSize(ByteIOContext *pb, offset_t pos)
{
offset_t curpos;
curpos = url_ftell(pb);
url_fseek(pb, pos, SEEK_SET);
put_be16(pb, curpos - pos - 2);
url_fseek(pb, curpos, SEEK_SET);
return curpos - pos;
}
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
GXFContext *gxf = s->priv_data;
ByteIOContext *pb = s->pb;
AVStream *st = s->streams[pkt->stream_index];
int64_t pos = url_ftell(pb);
int padding = 0;
int packet_start_offset = url_ftell(pb) / 1024;
gxf_write_packet_header(pb, PKT_MEDIA);
if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
padding = 4 - pkt->size % 4;
else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
gxf_write_media_preamble(s, pkt, pkt->size + padding);
put_buffer(pb, pkt->data, pkt->size);
gxf_write_padding(pb, padding);
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
if (!(gxf->flt_entries_nb % 500)) {
gxf->flt_entries = av_realloc(gxf->flt_entries,
(gxf->flt_entries_nb+500)*sizeof(*gxf->flt_entries));
if (!gxf->flt_entries) {
av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
return -1;
}
}
gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
gxf->nb_fields += 2; // count fields
}
updatePacketSize(pb, pos);
gxf->packet_count++;
if (gxf->packet_count == 100) {
gxf_write_map_packet(s, 0);
gxf->packet_count = 0;
}
put_flush_packet(pb);
return 0;
}
static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
{
WVContext *wc = ctx->priv_data;
uint32_t tag, ver;
int size;
int rate, bpp, chan;
wc->pos = url_ftell(pb);
tag = get_le32(pb);
if (tag != MKTAG('w', 'v', 'p', 'k'))
return -1;
size = get_le32(pb);
if(size < 24 || size > WV_BLOCK_LIMIT){
av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
return -1;
}
wc->blksize = size;
ver = get_le16(pb);
if(ver < 0x402 || ver > 0x410){
av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
return -1;
}
get_byte(pb); // track no
get_byte(pb); // track sub index
wc->samples = get_le32(pb); // total samples in file
wc->soff = get_le32(pb); // offset in samples of current block
get_buffer(pb, wc->extra, WV_EXTRA_SIZE);
wc->flags = AV_RL32(wc->extra + 4);
//parse flags
bpp = ((wc->flags & 3) + 1) << 3;
chan = 1 + !(wc->flags & WV_MONO);
rate = wv_rates[(wc->flags >> 23) & 0xF];
if(rate == -1){
av_log(ctx, AV_LOG_ERROR, "Unknown sampling rate\n");
return -1;
}
if(!wc->bpp) wc->bpp = bpp;
if(!wc->chan) wc->chan = chan;
if(!wc->rate) wc->rate = rate;
if(wc->flags && bpp != wc->bpp){
av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
return -1;
}
if(wc->flags && chan != wc->chan){
av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
return -1;
}
if(wc->flags && rate != wc->rate){
av_log(ctx, AV_LOG_ERROR, "Sampling rate differ, this block: %i, header block: %i\n", rate, wc->rate);
return -1;
}
wc->blksize = size - 24;
return 0;
}
AVParserState *ff_store_parser_state(AVFormatContext *s)
{
int i;
AVStream *st;
AVParserStreamState *ss;
AVParserState *state = av_malloc(sizeof(AVParserState));
if (!state)
return NULL;
state->stream_states = av_malloc(sizeof(AVParserStreamState) * s->nb_streams);
if (!state->stream_states) {
av_free(state);
return NULL;
}
state->fpos = url_ftell(s->pb);
// copy context structures
state->cur_st = s->cur_st;
state->packet_buffer = s->packet_buffer;
state->raw_packet_buffer = s->raw_packet_buffer;
state->raw_packet_buffer_remaining_size = s->raw_packet_buffer_remaining_size;
s->cur_st = NULL;
s->packet_buffer = NULL;
s->raw_packet_buffer = NULL;
s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
// copy stream structures
state->nb_streams = s->nb_streams;
for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
ss = &state->stream_states[i];
ss->parser = st->parser;
ss->last_IP_pts = st->last_IP_pts;
ss->cur_dts = st->cur_dts;
ss->reference_dts = st->reference_dts;
ss->cur_ptr = st->cur_ptr;
ss->cur_len = st->cur_len;
ss->probe_packets = st->probe_packets;
ss->cur_pkt = st->cur_pkt;
st->parser = NULL;
st->last_IP_pts = AV_NOPTS_VALUE;
st->cur_dts = AV_NOPTS_VALUE;
st->reference_dts = AV_NOPTS_VALUE;
st->cur_ptr = NULL;
st->cur_len = 0;
st->probe_packets = MAX_PROBE_PACKETS;
av_init_packet(&st->cur_pkt);
}
return state;
}
static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
{
ByteIOContext *pb = s->pb;
int64_t pos;
int mpeg = sc->track_type == 4 || sc->track_type == 9;
/* track description section */
put_byte(pb, sc->media_type + 0x80);
put_byte(pb, index + 0xC0);
pos = url_ftell(pb);
put_be16(pb, 0); /* size */
/* media file name */
put_byte(pb, TRACK_NAME);
put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
put_tag(pb, ES_NAME_PATTERN);
put_be16(pb, sc->media_info);
put_byte(pb, 0);
if (!mpeg) {
/* auxiliary information */
put_byte(pb, TRACK_AUX);
put_byte(pb, 8);
if (sc->track_type == 3)
gxf_write_timecode_auxiliary(pb, sc);
else
put_le64(pb, 0);
}
/* file system version */
put_byte(pb, TRACK_VER);
put_byte(pb, 4);
put_be32(pb, 0);
if (mpeg)
gxf_write_mpeg_auxiliary(pb, s->streams[index]);
/* frame rate */
put_byte(pb, TRACK_FPS);
put_byte(pb, 4);
put_be32(pb, sc->frame_rate_index);
/* lines per frame */
put_byte(pb, TRACK_LINES);
put_byte(pb, 4);
put_be32(pb, sc->lines_index);
/* fields per frame */
put_byte(pb, TRACK_FPF);
put_byte(pb, 4);
put_be32(pb, sc->fields);
return updateSize(pb, pos);
}
static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
{
AVStream *st = s->streams[1];
int tmp, tmp2, samples, size;
uint64_t pos = url_ftell(s->pb);
unsigned dts;
dts = get_be32(s->pb);
st->codec->sample_rate = get_be32(s->pb);
samples = get_be32(s->pb);
tmp = get_be32(s->pb);
dprintf(s, "packet num %d\n", tmp);
tmp = get_be16(s->pb); // unkown
dprintf(s, "unknown %d\n", tmp);
tmp = get_byte(s->pb); // major version
tmp2 = get_byte(s->pb); // minor version
dprintf(s, "version %d.%d\n", tmp, tmp2);
tmp = get_be32(s->pb); // unknown
dprintf(s, "unknown %d\n", tmp);
size = atom->size - 8 - (url_ftell(s->pb) - pos);
if (size < 0)
return -1;
if (av_get_packet(s->pb, pkt, size) != size) {
av_log(s, AV_LOG_ERROR, "error reading video packet\n");
return -1;
}
pkt->stream_index = 1;
pkt->dts = dts;
pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
dprintf(s, "pkt dts %lld duration %d samples %d sample rate %d\n",
pkt->dts, pkt->duration, samples, st->codec->sample_rate);
return 0;
}
static int gxf_write_track_description_section(ByteIOContext *pb, GXFContext *ctx)
{
int64_t pos;
int i;
pos = url_ftell(pb);
put_be16(pb, 0); /* size */
for (i = 0; i < ctx->fc->nb_streams; ++i)
gxf_write_track_description(pb, &ctx->streams[i]);
return updateSize(pb, pos);
}
/*
* Process EA file header
* Returns 1 if the EA file is valid and successfully opened, 0 otherwise
*/
static int process_ea_header(AVFormatContext *s) {
uint32_t blockid, size = 0;
EaDemuxContext *ea = s->priv_data;
ByteIOContext *pb = &s->pb;
int i;
for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
unsigned int startpos = url_ftell(pb);
int err = 0;
blockid = get_le32(pb);
size = get_le32(pb);
if (i == 0)
ea->big_endian = size > 0x000FFFFF;
if (ea->big_endian)
size = bswap_32(size);
switch (blockid) {
case ISNh_TAG:
if (get_le32(pb) != EACS_TAG) {
av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
return 0;
}
err = process_audio_header_eacs(s);
break;
case SCHl_TAG :
blockid = get_le32(pb);
if (blockid == GSTR_TAG) {
url_fskip(pb, 4);
} else if (blockid != PT00_TAG) {
av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
return 0;
}
err = process_audio_header_elements(s);
break;
case MVhd_TAG :
err = process_video_header_vp6(s);
break;
}
if (err < 0) {
av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
return err;
}
url_fseek(pb, startpos + size, SEEK_SET);
}
url_fseek(pb, 0, SEEK_SET);
return 1;
}
static int avs_read_audio_packet(AVFormatContext * s, AVPacket * pkt)
{
avs_format_t *avs = s->priv_data;
int ret, size;
size = url_ftell(&s->pb);
ret = voc_get_packet(s, pkt, avs->st_audio, avs->remaining_audio_size);
size = url_ftell(&s->pb) - size;
avs->remaining_audio_size -= size;
if (ret == AVERROR_IO)
return 0; /* this indicate EOS */
if (ret < 0)
return ret;
pkt->stream_index = avs->st_audio->index;
pkt->flags |= PKT_FLAG_KEY;
return size;
}
static int avi_write_trailer(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
ByteIOContext *pb = s->pb;
int res = 0;
int i, j, n, nb_frames;
int64_t file_size;
if (!url_is_streamed(pb)){
if (avi->riff_id == 1) {
ff_end_tag(pb, avi->movi_list);
res = avi_write_idx1(s);
ff_end_tag(pb, avi->riff_start);
} else {
avi_write_ix(s);
ff_end_tag(pb, avi->movi_list);
ff_end_tag(pb, avi->riff_start);
file_size = url_ftell(pb);
url_fseek(pb, avi->odml_list - 8, SEEK_SET);
put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
url_fskip(pb, 16);
for (n=nb_frames=0;n<s->nb_streams;n++) {
AVCodecContext *stream = s->streams[n]->codec;
AVIStream *avist= s->streams[n]->priv_data;
if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
if (nb_frames < avist->packet_count)
nb_frames = avist->packet_count;
} else {
if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
nb_frames += avist->packet_count;
}
}
}
put_le32(pb, nb_frames);
url_fseek(pb, file_size, SEEK_SET);
avi_write_counters(s, avi->riff_id);
}
}
put_flush_packet(pb);
for (i=0; i<s->nb_streams; i++) {
AVIStream *avist= s->streams[i]->priv_data;
for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
av_free(avist->indexes.cluster[j]);
av_freep(&avist->indexes.cluster);
avist->indexes.ents_allocated = avist->indexes.entry = 0;
}
return res;
}
static int nuv_packet(AVFormatContext *s, AVPacket *pkt) {
NUVContext *ctx = s->priv_data;
ByteIOContext *pb = s->pb;
uint8_t hdr[HDRSIZE];
frametype_t frametype;
int ret, size;
while (!url_feof(pb)) {
int copyhdrsize = ctx->rtjpg_video ? HDRSIZE : 0;
ret = get_buffer(pb, hdr, HDRSIZE);
if (ret <= 0)
return ret ? ret : -1;
frametype = hdr[0];
size = PKTSIZE(AV_RL32(&hdr[8]));
switch (frametype) {
case NUV_EXTRADATA:
if (!ctx->rtjpg_video) {
url_fskip(pb, size);
break;
}
case NUV_VIDEO:
if (ctx->v_id < 0) {
av_log(s, AV_LOG_ERROR, "Video packet in file without video stream!\n");
url_fskip(pb, size);
break;
}
ret = av_new_packet(pkt, copyhdrsize + size);
if (ret < 0)
return ret;
pkt->pos = url_ftell(pb) - copyhdrsize;
pkt->pts = AV_RL32(&hdr[4]);
pkt->stream_index = ctx->v_id;
memcpy(pkt->data, hdr, copyhdrsize);
ret = get_buffer(pb, pkt->data + copyhdrsize, size);
return ret;
case NUV_AUDIO:
if (ctx->a_id < 0) {
av_log(s, AV_LOG_ERROR, "Audio packet in file without audio stream!\n");
url_fskip(pb, size);
break;
}
ret = av_get_packet(pb, pkt, size);
pkt->pts = AV_RL32(&hdr[4]);
pkt->stream_index = ctx->a_id;
return ret;
case NUV_SEEKP:
// contains no data, size value is invalid
break;
default:
url_fskip(pb, size);
break;
}
}
return AVERROR(EIO);
}
static int gxf_write_umf_packet(AVFormatContext *s)
{
GXFContext *gxf = s->priv_data;
ByteIOContext *pb = s->pb;
int64_t pos = url_ftell(pb);
gxf_write_packet_header(pb, PKT_UMF);
/* preamble */
put_byte(pb, 3); /* first and last (only) packet */
put_be32(pb, gxf->umf_length); /* data length */
gxf->umf_start_offset = url_ftell(pb);
gxf_write_umf_payload(s);
gxf_write_umf_material_description(s);
gxf->umf_track_size = gxf_write_umf_track_description(s);
gxf->umf_media_size = gxf_write_umf_media_description(s);
gxf->umf_length = url_ftell(pb) - gxf->umf_start_offset;
return updatePacketSize(pb, pos);
}
static int read_atom(AVFormatContext *s, Atom *atom)
{
atom->offset = url_ftell(s->pb);
atom->size = get_be32(s->pb);
if (atom->size < 8)
return -1;
atom->tag = get_le32(s->pb);
dprintf(s, "atom %d %.4s offset %#llx\n",
atom->size, (char*)&atom->tag, atom->offset);
return atom->size;
}
static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream)
{
int64_t pos;
/* track description section */
put_byte(pb, stream->media_type + 0x80);
put_byte(pb, stream->index + 0xC0);
pos = url_ftell(pb);
put_be16(pb, 0); /* size */
/* media file name */
put_byte(pb, TRACK_NAME);
put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
put_tag(pb, ES_NAME_PATTERN);
put_be16(pb, stream->media_info);
put_byte(pb, 0);
if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) {
/* auxiliary information */
put_byte(pb, TRACK_AUX);
put_byte(pb, 8);
if (stream->codec->codec_id == CODEC_ID_NONE)
gxf_write_timecode_auxiliary(pb, stream);
else
put_le64(pb, 0);
}
/* file system version */
put_byte(pb, TRACK_VER);
put_byte(pb, 4);
put_be32(pb, 0);
if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
gxf_write_mpeg_auxiliary(pb, stream);
/* frame rate */
put_byte(pb, TRACK_FPS);
put_byte(pb, 4);
put_be32(pb, stream->frame_rate_index);
/* lines per frame */
put_byte(pb, TRACK_LINES);
put_byte(pb, 4);
put_be32(pb, stream->lines_index);
/* fields per frame */
put_byte(pb, TRACK_FPF);
put_byte(pb, 4);
put_be32(pb, stream->fields);
return updateSize(pb, pos);
}
static int mpc_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
MPCContext *c = s->priv_data;
AVStream *st;
if(get_le24(s->pb) != MKTAG('M', 'P', '+', 0)){
av_log(s, AV_LOG_ERROR, "Not a Musepack file\n");
return -1;
}
c->ver = get_byte(s->pb);
if(c->ver != 0x07 && c->ver != 0x17){
av_log(s, AV_LOG_ERROR, "Can demux Musepack SV7, got version %02X\n", c->ver);
return -1;
}
c->fcount = get_le32(s->pb);
if((int64_t)c->fcount * sizeof(MPCFrame) >= UINT_MAX){
av_log(s, AV_LOG_ERROR, "Too many frames, seeking is not possible\n");
return -1;
}
c->frames = av_malloc(c->fcount * sizeof(MPCFrame));
c->curframe = 0;
c->lastframe = -1;
c->curbits = 8;
c->frames_noted = 0;
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_MUSEPACK7;
st->codec->channels = 2;
st->codec->bits_per_coded_sample = 16;
st->codec->extradata_size = 16;
st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
get_buffer(s->pb, st->codec->extradata, 16);
st->codec->sample_rate = mpc_rate[st->codec->extradata[2] & 3];
av_set_pts_info(st, 32, MPC_FRAMESIZE, st->codec->sample_rate);
/* scan for seekpoints */
st->start_time = 0;
st->duration = c->fcount;
/* try to read APE tags */
if (!url_is_streamed(s->pb)) {
int64_t pos = url_ftell(s->pb);
ff_ape_parse_tag(s);
if (!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX))
ff_id3v1_read(s);
url_fseek(s->pb, pos, SEEK_SET);
}
return 0;
}
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
ByteIOContext *pb = s->pb;
AVStream *st = s->streams[0];
CaffContext *caf = s->priv_data;
int res, pkt_size = 0, pkt_frames = 0;
int64_t left = CAF_MAX_PKT_SIZE;
if (url_feof(pb))
return AVERROR(EIO);
/* don't read past end of data chunk */
if (caf->data_size > 0) {
left = (caf->data_start + caf->data_size) - url_ftell(pb);
if (left <= 0)
return AVERROR(EIO);
}
pkt_frames = caf->frames_per_packet;
pkt_size = caf->bytes_per_packet;
if (pkt_size > 0 && pkt_frames == 1) {
pkt_size = (CAF_MAX_PKT_SIZE / pkt_size) * pkt_size;
pkt_size = FFMIN(pkt_size, left);
pkt_frames = pkt_size / caf->bytes_per_packet;
} else if (st->nb_index_entries) {
if (caf->packet_cnt < st->nb_index_entries - 1) {
pkt_size = st->index_entries[caf->packet_cnt + 1].pos - st->index_entries[caf->packet_cnt].pos;
pkt_frames = st->index_entries[caf->packet_cnt + 1].timestamp - st->index_entries[caf->packet_cnt].timestamp;
} else if (caf->packet_cnt == st->nb_index_entries - 1) {
pkt_size = caf->num_bytes - st->index_entries[caf->packet_cnt].pos;
pkt_frames = st->duration - st->index_entries[caf->packet_cnt].timestamp;
} else {
return AVERROR(EIO);
}
}
if (pkt_size == 0 || pkt_frames == 0 || pkt_size > left)
return AVERROR(EIO);
res = av_get_packet(pb, pkt, pkt_size);
if (res < 0)
return res;
pkt->size = res;
pkt->stream_index = 0;
pkt->dts = pkt->pts = caf->frame_cnt;
caf->packet_cnt++;
caf->frame_cnt += pkt_frames;
return 0;
}
static int mp3_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
AVStream *st;
uint8_t buf[ID3v1_TAG_SIZE];
int len, ret, filesize;
offset_t off;
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_MP3;
st->need_parsing = AVSTREAM_PARSE_FULL;
st->start_time = 0;
/* try to get the TAG */
if (!url_is_streamed(s->pb)) {
/* XXX: change that */
filesize = url_fsize(s->pb);
if (filesize > 128) {
url_fseek(s->pb, filesize - 128, SEEK_SET);
ret = get_buffer(s->pb, buf, ID3v1_TAG_SIZE);
if (ret == ID3v1_TAG_SIZE) {
id3v1_parse_tag(s, buf);
}
url_fseek(s->pb, 0, SEEK_SET);
}
}
/* if ID3v2 header found, skip it */
ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
if (ret != ID3v2_HEADER_SIZE)
return -1;
if (id3v2_match(buf)) {
/* parse ID3v2 header */
len = ((buf[6] & 0x7f) << 21) |
((buf[7] & 0x7f) << 14) |
((buf[8] & 0x7f) << 7) |
(buf[9] & 0x7f);
id3v2_parse(s, len, buf[3], buf[5]);
} else {
url_fseek(s->pb, 0, SEEK_SET);
}
off = url_ftell(s->pb);
mp3_parse_vbr_tags(s, st, off);
url_fseek(s->pb, off, SEEK_SET);
/* the parameters will be extracted from the compressed bitstream */
return 0;
}
static int wav_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
int ret, size;
int64_t left;
AVStream *st;
WAVContext *wav = s->priv_data;
if (url_feof(s->pb))
return AVERROR(EIO);
st = s->streams[0];
left = wav->data_end - url_ftell(s->pb);
if (left <= 0){
if (CONFIG_W64_DEMUXER && wav->w64)
left = find_guid(s->pb, guid_data) - 24;
else
left = find_tag(s->pb, MKTAG('d', 'a', 't', 'a'));
if (left < 0)
return AVERROR(EIO);
wav->data_end= url_ftell(s->pb) + left;
}
size = MAX_SIZE;
if (st->codec->block_align > 1) {
if (size < st->codec->block_align)
size = st->codec->block_align;
size = (size / st->codec->block_align) * st->codec->block_align;
}
size = FFMIN(size, left);
ret = av_get_packet(s->pb, pkt, size);
if (ret <= 0)
return AVERROR(EIO);
pkt->stream_index = 0;
/* note: we need to modify the packet size here to handle the last
packet */
pkt->size = ret;
return ret;
}
/* read a run length encoded sgi image */
static int read_rle_sgi(const SGIInfo *sgi_info,
AVPicture *pict, ByteIOContext *f)
{
uint8_t *dest_row;
unsigned long *start_table;
int y, z, xsize, ysize, zsize, tablen;
long start_offset;
int ret = 0;
xsize = sgi_info->xsize;
ysize = sgi_info->ysize;
zsize = sgi_info->zsize;
/* skip header */
url_fseek(f, SGI_HEADER_SIZE, SEEK_SET);
/* size of rle offset and length tables */
tablen = ysize * zsize * sizeof(long);
start_table = (unsigned long *)av_malloc(tablen);
if (!get_buffer(f, (uint8_t *)start_table, tablen)) {
ret = AVERROR_IO;
goto fail;
}
/* skip run length table */
url_fseek(f, tablen, SEEK_CUR);
for (z = 0; z < zsize; z++) {
for (y = 0; y < ysize; y++) {
dest_row = pict->data[0] + (ysize - 1 - y) * (xsize * zsize);
start_offset = BE_32(&start_table[y + z * ysize]);
/* don't seek if already at the next rle start offset */
if (url_ftell(f) != start_offset) {
url_fseek(f, start_offset, SEEK_SET);
}
if (expand_rle_row(f, dest_row, z, zsize) != xsize) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
}
}
fail:
av_free(start_table);
return ret;
}
static int qcp_read_packet(AVFormatContext *s, AVPacket *pkt)
{
ByteIOContext *pb = s->pb;
QCPContext *c = s->priv_data;
unsigned int chunk_size, tag;
while(!url_feof(pb)) {
if (c->data_size) {
int pkt_size, ret, mode = get_byte(pb);
if (s->packet_size) {
pkt_size = s->packet_size - 1;
} else if (mode > QCP_MAX_MODE || (pkt_size = c->rates_per_mode[mode]) < 0) {
c->data_size--;
continue;
}
if (c->data_size <= pkt_size) {
av_log(s, AV_LOG_WARNING, "Data chunk is too small.\n");
pkt_size = c->data_size - 1;
}
if ((ret = av_get_packet(pb, pkt, pkt_size)) >= 0) {
if (pkt_size != ret)
av_log(s, AV_LOG_ERROR, "Packet size is too small.\n");
c->data_size -= pkt_size + 1;
}
return ret;
}
if (url_ftell(pb) & 1 && get_byte(pb))
av_log(s, AV_LOG_WARNING, "Padding should be 0.\n");
tag = get_le32(pb);
chunk_size = get_le32(pb);
switch (tag) {
case MKTAG('v', 'r', 'a', 't'):
if (get_le32(pb)) // var-rate-flag
s->packet_size = 0;
url_fskip(pb, 4); // size-in-packets
break;
case MKTAG('d', 'a', 't', 'a'):
c->data_size = chunk_size;
break;
default:
url_fskip(pb, chunk_size);
}
}
return AVERROR_EOF;
}
static int read_packet(AVFormatContext *s,
AVPacket *pkt)
{
AnmDemuxContext *anm = s->priv_data;
ByteIOContext *pb = s->pb;
Page *p;
int tmp, record_size;
if (url_feof(s->pb))
return AVERROR(EIO);
if (anm->page < 0)
return 0;
repeat:
p = &anm->pt[anm->page];
/* parse page header */
if (anm->record < 0) {
url_fseek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16), SEEK_SET);
url_fskip(pb, 8 + 2*p->nb_records);
anm->record = 0;
}
/* if we have fetched all records in this page, then find the
next page and repeat */
if (anm->record >= p->nb_records) {
anm->page = find_record(anm, p->base_record + p->nb_records);
if (anm->page < 0)
return anm->page;
anm->record = -1;
goto repeat;
}
/* fetch record size */
tmp = url_ftell(pb);
url_fseek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16) +
8 + anm->record * 2, SEEK_SET);
record_size = get_le16(pb);
url_fseek(pb, tmp, SEEK_SET);
/* fetch record */
pkt->size = av_get_packet(s->pb, pkt, record_size);
if (pkt->size < 0)
return pkt->size;
if (p->base_record + anm->record == 0)
pkt->flags |= PKT_FLAG_KEY;
anm->record++;
return 0;
}
static int iss_read_packet(AVFormatContext *s, AVPacket *pkt)
{
IssDemuxContext *iss = s->priv_data;
int ret = av_get_packet(s->pb, pkt, iss->packet_size);
if(ret != iss->packet_size)
return AVERROR(EIO);
pkt->stream_index = 0;
pkt->pts = url_ftell(s->pb) - iss->sample_start_pos;
if(s->streams[0]->codec->channels > 0)
pkt->pts /= s->streams[0]->codec->channels*2;
return 0;
}
static int gxf_write_material_data_section(AVFormatContext *s)
{
GXFContext *gxf = s->priv_data;
AVIOContext *pb = s->pb;
int64_t pos;
int len;
const char *filename = strrchr(s->filename, '/');
pos = url_ftell(pb);
avio_wb16(pb, 0); /* size */
/* name */
if (filename)
filename++;
else
filename = s->filename;
len = strlen(filename);
avio_w8(pb, MAT_NAME);
avio_w8(pb, strlen(SERVER_PATH) + len + 1);
avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
avio_write(pb, filename, len);
avio_w8(pb, 0);
/* first field */
avio_w8(pb, MAT_FIRST_FIELD);
avio_w8(pb, 4);
avio_wb32(pb, 0);
/* last field */
avio_w8(pb, MAT_LAST_FIELD);
avio_w8(pb, 4);
avio_wb32(pb, gxf->nb_fields);
/* reserved */
avio_w8(pb, MAT_MARK_IN);
avio_w8(pb, 4);
avio_wb32(pb, 0);
avio_w8(pb, MAT_MARK_OUT);
avio_w8(pb, 4);
avio_wb32(pb, gxf->nb_fields);
/* estimated size */
avio_w8(pb, MAT_SIZE);
avio_w8(pb, 4);
avio_wb32(pb, url_fsize(pb) / 1024);
return updateSize(pb, pos);
}
static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
R3DContext *r3d = s->priv_data;
Atom atom;
int ret;
if (read_atom(s, &atom) < 0) {
av_log(s, AV_LOG_ERROR, "error reading atom\n");
return -1;
}
if (atom.tag == MKTAG('R','E','D','1')) {
if ((ret = r3d_read_red1(s)) < 0) {
av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
return ret;
}
} else {
av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
return -1;
}
s->data_offset = url_ftell(s->pb);
dprintf(s, "data offset %#llx\n", s->data_offset);
if (url_is_streamed(s->pb))
return 0;
// find REOB/REOF/REOS to load index
url_fseek(s->pb, url_fsize(s->pb)-48-8, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading end atom\n");
if (atom.tag != MKTAG('R','E','O','B') &&
atom.tag != MKTAG('R','E','O','F') &&
atom.tag != MKTAG('R','E','O','S'))
goto out;
r3d_read_reos(s);
if (r3d->rdvo_offset) {
url_fseek(s->pb, r3d->rdvo_offset, SEEK_SET);
if (read_atom(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
if (atom.tag == MKTAG('R','D','V','O')) {
if (r3d_read_rdvo(s, &atom) < 0)
av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
}
}
out:
url_fseek(s->pb, s->data_offset, SEEK_SET);
return 0;
}
static int wav_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
int ret, size, left;
AVStream *st;
WAVContext *wav = s->priv_data;
if (url_feof(&s->pb))
return AVERROR_IO;
st = s->streams[0];
left= wav->data_end - url_ftell(&s->pb);
if(left <= 0){
left = find_tag(&(s->pb), MKTAG('d', 'a', 't', 'a'));
if (left < 0) {
return AVERROR_IO;
}
wav->data_end= url_ftell(&s->pb) + left;
}
size = MAX_SIZE;
if (st->codec->block_align > 1) {
if (size < st->codec->block_align)
size = st->codec->block_align;
size = (size / st->codec->block_align) * st->codec->block_align;
}
size= FFMIN(size, left);
ret= av_get_packet(&s->pb, pkt, size);
if (ret <= 0)
return AVERROR_IO;
pkt->stream_index = 0;
/* note: we need to modify the packet size here to handle the last
packet */
pkt->size = ret;
return ret;
}
static int w64_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
int64_t size;
ByteIOContext *pb = s->pb;
WAVContext *wav = s->priv_data;
AVStream *st;
uint8_t guid[16];
get_buffer(pb, guid, 16);
if (memcmp(guid, guid_riff, 16))
return -1;
if (get_le64(pb) < 16 + 8 + 16 + 8 + 16 + 8) /* riff + wave + fmt + sizes */
return -1;
get_buffer(pb, guid, 16);
if (memcmp(guid, guid_wave, 16)) {
av_log(s, AV_LOG_ERROR, "could not find wave guid\n");
return -1;
}
size = find_guid(pb, guid_fmt);
if (size < 0) {
av_log(s, AV_LOG_ERROR, "could not find fmt guid\n");
return -1;
}
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
/* subtract chunk header size - normal wav file doesn't count it */
ff_get_wav_header(pb, st->codec, size - 24);
url_fskip(pb, FFALIGN(size, INT64_C(8)) - size);
st->need_parsing = AVSTREAM_PARSE_FULL;
av_set_pts_info(st, 64, 1, st->codec->sample_rate);
size = find_guid(pb, guid_data);
if (size < 0) {
av_log(s, AV_LOG_ERROR, "could not find data guid\n");
return -1;
}
wav->data_end = url_ftell(pb) + size - 24;
wav->w64 = 1;
return 0;
}
static void put_swf_tag(AVFormatContext *s, int tag)
{
SWFContext *swf = s->priv_data;
ByteIOContext *pb = s->pb;
swf->tag_pos = url_ftell(pb);
swf->tag = tag;
/* reserve some room for the tag */
if (tag & TAG_LONG) {
put_le16(pb, 0);
put_le32(pb, 0);
} else {
put_le16(pb, 0);
}
}
