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 dfa_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
uint32_t frame_size;
int ret, first = 1;
if (pb->eof_reached)
return AVERROR_EOF;
if (av_get_packet(pb, pkt, 12) != 12)
return AVERROR(EIO);
while (!pb->eof_reached) {
if (!first) {
ret = av_append_packet(pb, pkt, 12);
if (ret < 0) {
av_free_packet(pkt);
return ret;
}
} else
first = 0;
frame_size = AV_RL32(pkt->data + pkt->size - 8);
if (frame_size > INT_MAX - 4) {
av_log(s, AV_LOG_ERROR, "Too large chunk size: %"PRIu32"\n", frame_size);
return AVERROR(EIO);
}
if (AV_RL32(pkt->data + pkt->size - 12) == MKTAG('E', 'O', 'F', 'R')) {
if (frame_size) {
av_log(s, AV_LOG_WARNING,
"skipping %"PRIu32" bytes of end-of-frame marker chunk\n",
frame_size);
avio_skip(pb, frame_size);
}
return 0;
}
ret = av_append_packet(pb, pkt, frame_size);
if (ret < 0) {
av_free_packet(pkt);
return ret;
}
}
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 ea_read_packet(AVFormatContext *s, AVPacket *pkt)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int partial_packet = 0;
unsigned int chunk_type, chunk_size;
int ret = 0, packet_read = 0, key = 0;
int av_uninit(num_samples);
while (!packet_read || partial_packet) {
chunk_type = avio_rl32(pb);
chunk_size = ea->big_endian ? avio_rb32(pb) : avio_rl32(pb);
if (chunk_size < 8)
return AVERROR_INVALIDDATA;
chunk_size -= 8;
switch (chunk_type) {
/* audio data */
case ISNh_TAG:
/* header chunk also contains data; skip over the header portion */
if (chunk_size < 32)
return AVERROR_INVALIDDATA;
avio_skip(pb, 32);
chunk_size -= 32;
case ISNd_TAG:
case SCDl_TAG:
case SNDC_TAG:
case SDEN_TAG:
if (!ea->audio_codec) {
avio_skip(pb, chunk_size);
break;
} else if (ea->audio_codec == AV_CODEC_ID_PCM_S16LE_PLANAR ||
ea->audio_codec == AV_CODEC_ID_MP3) {
num_samples = avio_rl32(pb);
avio_skip(pb, 8);
chunk_size -= 12;
} else if (ea->audio_codec == AV_CODEC_ID_ADPCM_PSX) {
avio_skip(pb, 8);
chunk_size -= 8;
}
if (partial_packet) {
avpriv_request_sample(s, "video header followed by audio packet");
av_packet_unref(pkt);
partial_packet = 0;
}
if (!chunk_size)
continue;
ret = av_get_packet(pb, pkt, chunk_size);
if (ret < 0)
return ret;
pkt->stream_index = ea->audio_stream_index;
switch (ea->audio_codec) {
case AV_CODEC_ID_ADPCM_EA:
case AV_CODEC_ID_ADPCM_EA_R1:
case AV_CODEC_ID_ADPCM_EA_R2:
case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
case AV_CODEC_ID_ADPCM_EA_R3:
if (pkt->size < 4) {
av_log(s, AV_LOG_ERROR, "Packet is too short\n");
av_packet_unref(pkt);
return AVERROR_INVALIDDATA;
}
if (ea->audio_codec == AV_CODEC_ID_ADPCM_EA_R3)
pkt->duration = AV_RB32(pkt->data);
else
pkt->duration = AV_RL32(pkt->data);
break;
case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
pkt->duration = ret * 2 / ea->num_channels;
break;
case AV_CODEC_ID_PCM_S16LE_PLANAR:
case AV_CODEC_ID_MP3:
pkt->duration = num_samples;
break;
case AV_CODEC_ID_ADPCM_PSX:
pkt->duration = chunk_size / (16 * ea->num_channels) * 28;
break;
default:
pkt->duration = chunk_size / (ea->bytes * ea->num_channels);
}
packet_read = 1;
break;
/* ending tag */
case 0:
case ISNe_TAG:
case SCEl_TAG:
case SEND_TAG:
case SEEN_TAG:
while (!avio_feof(pb)) {
int tag = avio_rl32(pb);
if (tag == ISNh_TAG ||
tag == SCHl_TAG ||
tag == SEAD_TAG ||
tag == SHEN_TAG) {
avio_skip(pb, -4);
break;
}
}
if (avio_feof(pb))
ret = AVERROR_EOF;
packet_read = 1;
break;
case MVIh_TAG:
case kVGT_TAG:
case pQGT_TAG:
case TGQs_TAG:
case MADk_TAG:
key = AV_PKT_FLAG_KEY;
case MVIf_TAG:
case fVGT_TAG:
case MADm_TAG:
case MADe_TAG:
avio_seek(pb, -8, SEEK_CUR); // include chunk preamble
chunk_size += 8;
goto get_video_packet;
case mTCD_TAG:
if (chunk_size < 8)
return AVERROR_INVALIDDATA;
avio_skip(pb, 8); // skip ea DCT header
chunk_size -= 8;
goto get_video_packet;
case MV0K_TAG:
case AV0K_TAG:
case MPCh_TAG:
case pIQT_TAG:
key = AV_PKT_FLAG_KEY;
case MV0F_TAG:
case AV0F_TAG:
get_video_packet:
if (!chunk_size)
continue;
if (partial_packet) {
ret = av_append_packet(pb, pkt, chunk_size);
} else
ret = av_get_packet(pb, pkt, chunk_size);
if (ret < 0) {
packet_read = 1;
break;
}
partial_packet = chunk_type == MVIh_TAG;
if (chunk_type == AV0K_TAG || chunk_type == AV0F_TAG)
pkt->stream_index = ea->alpha.stream_index;
else
pkt->stream_index = ea->video.stream_index;
pkt->flags |= key;
packet_read = 1;
break;
default:
avio_skip(pb, chunk_size);
break;
}
}
if (ret < 0 && partial_packet)
av_packet_unref(pkt);
return ret;
}
static int wv_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
WVContext *wc = s->priv_data;
int ret;
int size, ver, off;
int64_t pos;
uint32_t block_samples;
if (s->pb->eof_reached)
return AVERROR_EOF;
if(wc->block_parsed) {
if ((ret = wv_read_block_header(s, s->pb, 0)) < 0)
return ret;
}
pos = wc->pos;
off = wc->multichannel ? 4 : 0;
if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
return AVERROR(ENOMEM);
if(wc->multichannel)
AV_WL32(pkt->data, wc->blksize + WV_EXTRA_SIZE + 12);
memcpy(pkt->data + off, wc->extra, WV_EXTRA_SIZE);
ret = avio_read(s->pb, pkt->data + WV_EXTRA_SIZE + off, wc->blksize);
if(ret != wc->blksize) {
av_free_packet(pkt);
return AVERROR(EIO);
}
while(!(wc->flags & WV_END_BLOCK)) {
if(avio_rl32(s->pb) != MKTAG('w', 'v', 'p', 'k')) {
av_free_packet(pkt);
return AVERROR_INVALIDDATA;
}
if((ret = av_append_packet(s->pb, pkt, 4)) < 0) {
av_free_packet(pkt);
return ret;
}
size = AV_RL32(pkt->data + pkt->size - 4);
if(size < 24 || size > WV_BLOCK_LIMIT) {
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Incorrect block size %d\n", size);
return AVERROR_INVALIDDATA;
}
wc->blksize = size;
ver = avio_rl16(s->pb);
if(ver < 0x402 || ver > 0x410) {
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
return AVERROR_PATCHWELCOME;
}
avio_r8(s->pb); // track no
avio_r8(s->pb); // track sub index
wc->samples = avio_rl32(s->pb); // total samples in file
wc->soff = avio_rl32(s->pb); // offset in samples of current block
if((ret = av_append_packet(s->pb, pkt, WV_EXTRA_SIZE)) < 0) {
av_free_packet(pkt);
return ret;
}
memcpy(wc->extra, pkt->data + pkt->size - WV_EXTRA_SIZE, WV_EXTRA_SIZE);
if ((ret = wv_read_block_header(s, s->pb, 1)) < 0) {
av_free_packet(pkt);
return ret;
}
ret = av_append_packet(s->pb, pkt, wc->blksize);
if(ret < 0) {
av_free_packet(pkt);
return ret;
}
}
pkt->stream_index = 0;
wc->block_parsed = 1;
pkt->pts = wc->soff;
block_samples = AV_RN32(wc->extra);
if (block_samples > INT32_MAX)
av_log(s, AV_LOG_WARNING, "Too many samples in block: %"PRIu32"\n", block_samples);
else
pkt->duration = block_samples;
av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
return 0;
}
static int mpjpeg_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int size;
int ret;
MPJPEGDemuxContext *mpjpeg = s->priv_data;
if (mpjpeg->boundary == NULL) {
uint8_t* boundary = NULL;
if (mpjpeg->strict_mime_boundary) {
boundary = mpjpeg_get_boundary(s->pb);
}
if (boundary != NULL) {
mpjpeg->boundary = boundary;
mpjpeg->searchstr = av_asprintf( "\r\n%s\r\n", boundary );
} else {
mpjpeg->boundary = av_strdup("--");
mpjpeg->searchstr = av_strdup("\r\n--");
}
if (!mpjpeg->boundary || !mpjpeg->searchstr) {
av_freep(&mpjpeg->boundary);
av_freep(&mpjpeg->searchstr);
return AVERROR(ENOMEM);
}
mpjpeg->searchstr_len = strlen(mpjpeg->searchstr);
}
ret = parse_multipart_header(s->pb, &size, mpjpeg->boundary, s);
if (ret < 0)
return ret;
if (size > 0) {
/* size has been provided to us in MIME header */
ret = av_get_packet(s->pb, pkt, size);
} else {
/* no size was given -- we read until the next boundary or end-of-file */
int remaining = 0, len;
const int read_chunk = 2048;
av_init_packet(pkt);
pkt->data = NULL;
pkt->size = 0;
pkt->pos = avio_tell(s->pb);
/* we may need to return as much as all we've read back to the buffer */
ffio_ensure_seekback(s->pb, read_chunk);
while ((ret = av_append_packet(s->pb, pkt, read_chunk - remaining)) >= 0) {
/* scan the new data */
char *start;
len = ret + remaining;
start = pkt->data + pkt->size - len;
do {
if (!memcmp(start, mpjpeg->searchstr, mpjpeg->searchstr_len)) {
// got the boundary! rewind the stream
avio_seek(s->pb, -(len-2), SEEK_CUR);
pkt->size -= (len-2);
return pkt->size;
}
len--;
start++;
} while (len >= mpjpeg->searchstr_len);
remaining = len;
}
/* error or EOF occurred */
if (ret == AVERROR_EOF) {
ret = pkt->size > 0 ? pkt->size : AVERROR_EOF;
} else {
av_packet_unref(pkt);
}
}
return ret;
}
static int apng_read_packet(AVFormatContext *s, AVPacket *pkt)
{
APNGDemuxContext *ctx = s->priv_data;
int ret;
int64_t size;
AVIOContext *pb = s->pb;
uint32_t len, tag;
/*
* fcTL chunk length, in bytes:
* 4 (length)
* 4 (tag)
* 26 (actual chunk)
* 4 (crc) bytes
* and needed next:
* 4 (length)
* 4 (tag (must be fdAT or IDAT))
*/
/* if num_play is not 1, then the seekback is already guaranteed */
if (ctx->num_play == 1 && (ret = ffio_ensure_seekback(pb, 46)) < 0)
return ret;
len = avio_rb32(pb);
tag = avio_rl32(pb);
switch (tag) {
case MKTAG('f', 'c', 'T', 'L'):
if (len != 26)
return AVERROR_INVALIDDATA;
if ((ret = decode_fctl_chunk(s, ctx, pkt)) < 0)
return ret;
/* fcTL must precede fdAT or IDAT */
len = avio_rb32(pb);
tag = avio_rl32(pb);
if (len > 0x7fffffff ||
tag != MKTAG('f', 'd', 'A', 'T') &&
tag != MKTAG('I', 'D', 'A', 'T'))
return AVERROR_INVALIDDATA;
size = 38 /* fcTL */ + 8 /* len, tag */ + len + 4 /* crc */;
if (size > INT_MAX)
return AVERROR(EINVAL);
if ((ret = avio_seek(pb, -46, SEEK_CUR)) < 0 ||
(ret = av_append_packet(pb, pkt, size)) < 0)
return ret;
if (ctx->num_play == 1 && (ret = ffio_ensure_seekback(pb, 8)) < 0)
return ret;
len = avio_rb32(pb);
tag = avio_rl32(pb);
while (tag &&
tag != MKTAG('f', 'c', 'T', 'L') &&
tag != MKTAG('I', 'E', 'N', 'D')) {
if (len > 0x7fffffff)
return AVERROR_INVALIDDATA;
if ((ret = avio_seek(pb, -8, SEEK_CUR)) < 0 ||
(ret = av_append_packet(pb, pkt, len + 12)) < 0)
return ret;
if (ctx->num_play == 1 && (ret = ffio_ensure_seekback(pb, 8)) < 0)
return ret;
len = avio_rb32(pb);
tag = avio_rl32(pb);
}
if ((ret = avio_seek(pb, -8, SEEK_CUR)) < 0)
return ret;
if (ctx->is_key_frame)
pkt->flags |= AV_PKT_FLAG_KEY;
return ret;
case MKTAG('I', 'E', 'N', 'D'):
ctx->cur_loop++;
if (ctx->ignore_loop || ctx->num_play >= 1 && ctx->cur_loop == ctx->num_play) {
avio_seek(pb, -8, SEEK_CUR);
return AVERROR_EOF;
}
if ((ret = avio_seek(pb, s->streams[0]->codec->extradata_size + 8, SEEK_SET)) < 0)
return ret;
return 0;
default:
{
char tag_buf[5];
av_get_codec_tag_string(tag_buf, sizeof(tag_buf), tag);
avpriv_request_sample(s, "In-stream tag=%s (0x%08X) len=%"PRIu32, tag_buf, tag, len);
avio_skip(pb, len + 4);
}
}
/* Handle the unsupported yet cases */
return AVERROR_PATCHWELCOME;
}
static int wv_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
WVContext *wc = s->priv_data;
int ret;
int size, ver, off;
if (url_feof(s->pb))
return AVERROR(EIO);
if(wc->block_parsed){
if(wv_read_block_header(s, s->pb, 0) < 0)
return -1;
}
off = wc->multichannel ? 4 : 0;
if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
return AVERROR(ENOMEM);
if(wc->multichannel)
AV_WL32(pkt->data, wc->blksize + WV_EXTRA_SIZE + 12);
memcpy(pkt->data + off, wc->extra, WV_EXTRA_SIZE);
ret = get_buffer(s->pb, pkt->data + WV_EXTRA_SIZE + off, wc->blksize);
if(ret != wc->blksize){
av_free_packet(pkt);
return AVERROR(EIO);
}
while(!(wc->flags & WV_END_BLOCK)){
if(get_le32(s->pb) != MKTAG('w', 'v', 'p', 'k')){
av_free_packet(pkt);
return -1;
}
if((ret = av_append_packet(s->pb, pkt, 4)) < 0){
av_free_packet(pkt);
return ret;
}
size = AV_RL32(pkt->data + pkt->size - 4);
if(size < 24 || size > WV_BLOCK_LIMIT){
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Incorrect block size %d\n", size);
return -1;
}
wc->blksize = size;
ver = get_le16(s->pb);
if(ver < 0x402 || ver > 0x410){
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
return -1;
}
get_byte(s->pb); // track no
get_byte(s->pb); // track sub index
wc->samples = get_le32(s->pb); // total samples in file
wc->soff = get_le32(s->pb); // offset in samples of current block
if((ret = av_append_packet(s->pb, pkt, WV_EXTRA_SIZE)) < 0){
av_free_packet(pkt);
return ret;
}
memcpy(wc->extra, pkt->data + pkt->size - WV_EXTRA_SIZE, WV_EXTRA_SIZE);
if(wv_read_block_header(s, s->pb, 1) < 0){
av_free_packet(pkt);
return -1;
}
ret = av_append_packet(s->pb, pkt, wc->blksize);
if(ret < 0){
av_free_packet(pkt);
return ret;
}
}
pkt->stream_index = 0;
wc->block_parsed = 1;
pkt->pts = wc->soff;
av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
return 0;
}
static int wc3_read_header(AVFormatContext *s)
{
Wc3DemuxContext *wc3 = s->priv_data;
AVIOContext *pb = s->pb;
unsigned int fourcc_tag;
unsigned int size;
AVStream *st;
int ret = 0;
char *buffer;
/* default context members */
wc3->width = WC3_DEFAULT_WIDTH;
wc3->height = WC3_DEFAULT_HEIGHT;
wc3->pts = 0;
wc3->video_stream_index = wc3->audio_stream_index = 0;
av_init_packet(&wc3->vpkt);
wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
/* skip the first 3 32-bit numbers */
avio_skip(pb, 12);
/* traverse through the chunks and load the header information before
* the first BRCH tag */
fourcc_tag = avio_rl32(pb);
size = (avio_rb32(pb) + 1) & (~1);
do {
switch (fourcc_tag) {
case SOND_TAG:
case INDX_TAG:
/* SOND unknown, INDX unnecessary; ignore both */
avio_skip(pb, size);
break;
case PC__TAG:
/* number of palettes, unneeded */
avio_skip(pb, 12);
break;
case BNAM_TAG:
/* load up the name */
buffer = av_malloc(size+1);
if (!buffer)
return AVERROR(ENOMEM);
if ((ret = avio_read(pb, buffer, size)) != size)
return AVERROR(EIO);
buffer[size] = 0;
av_dict_set(&s->metadata, "title", buffer,
AV_DICT_DONT_STRDUP_VAL);
break;
case SIZE_TAG:
/* video resolution override */
wc3->width = avio_rl32(pb);
wc3->height = avio_rl32(pb);
break;
case PALT_TAG:
/* one of several palettes */
avio_seek(pb, -8, SEEK_CUR);
av_append_packet(pb, &wc3->vpkt, 8 + PALETTE_SIZE);
break;
default:
av_log(s, AV_LOG_ERROR, "unrecognized WC3 chunk: %s\n",
av_fourcc2str(fourcc_tag));
return AVERROR_INVALIDDATA;
}
fourcc_tag = avio_rl32(pb);
/* chunk sizes are 16-bit aligned */
size = (avio_rb32(pb) + 1) & (~1);
if (avio_feof(pb))
return AVERROR(EIO);
} while (fourcc_tag != BRCH_TAG);
/* initialize the decoder streams */
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
wc3->video_stream_index = st->index;
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
st->codecpar->codec_id = AV_CODEC_ID_XAN_WC3;
st->codecpar->codec_tag = 0; /* no fourcc */
st->codecpar->width = wc3->width;
st->codecpar->height = wc3->height;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
wc3->audio_stream_index = st->index;
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
st->codecpar->codec_tag = 1;
st->codecpar->channels = WC3_AUDIO_CHANNELS;
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
st->codecpar->bits_per_coded_sample = WC3_AUDIO_BITS;
st->codecpar->sample_rate = WC3_SAMPLE_RATE;
st->codecpar->bit_rate = st->codecpar->channels * st->codecpar->sample_rate *
st->codecpar->bits_per_coded_sample;
st->codecpar->block_align = WC3_AUDIO_BITS * WC3_AUDIO_CHANNELS;
return 0;
}
static int wc3_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
Wc3DemuxContext *wc3 = s->priv_data;
AVIOContext *pb = s->pb;
unsigned int fourcc_tag;
unsigned int size;
int packet_read = 0;
int ret = 0;
unsigned char text[1024];
while (!packet_read) {
fourcc_tag = avio_rl32(pb);
/* chunk sizes are 16-bit aligned */
size = (avio_rb32(pb) + 1) & (~1);
if (avio_feof(pb))
return AVERROR(EIO);
switch (fourcc_tag) {
case BRCH_TAG:
/* no-op */
break;
case SHOT_TAG:
/* load up new palette */
avio_seek(pb, -8, SEEK_CUR);
av_append_packet(pb, &wc3->vpkt, 8 + 4);
break;
case VGA__TAG:
/* send out video chunk */
avio_seek(pb, -8, SEEK_CUR);
ret= av_append_packet(pb, &wc3->vpkt, 8 + size);
// ignore error if we have some data
if (wc3->vpkt.size > 0)
ret = 0;
*pkt = wc3->vpkt;
wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
pkt->stream_index = wc3->video_stream_index;
pkt->pts = wc3->pts;
packet_read = 1;
break;
case TEXT_TAG:
/* subtitle chunk */
if ((unsigned)size > sizeof(text) || (ret = avio_read(pb, text, size)) != size)
ret = AVERROR(EIO);
else {
int i = 0;
av_log (s, AV_LOG_DEBUG, "Subtitle time!\n");
if (i >= size || av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
return AVERROR_INVALIDDATA;
av_log (s, AV_LOG_DEBUG, " inglish: %s\n", &text[i + 1]);
i += text[i] + 1;
if (i >= size || av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
return AVERROR_INVALIDDATA;
av_log (s, AV_LOG_DEBUG, " doytsch: %s\n", &text[i + 1]);
i += text[i] + 1;
if (i >= size || av_strnlen(&text[i + 1], size - i - 1) >= size - i - 1)
return AVERROR_INVALIDDATA;
av_log (s, AV_LOG_DEBUG, " fronsay: %s\n", &text[i + 1]);
}
break;
case AUDI_TAG:
/* send out audio chunk */
ret= av_get_packet(pb, pkt, size);
pkt->stream_index = wc3->audio_stream_index;
pkt->pts = wc3->pts;
/* time to advance pts */
wc3->pts++;
packet_read = 1;
break;
default:
av_log(s, AV_LOG_ERROR, "unrecognized WC3 chunk: %s\n",
av_fourcc2str(fourcc_tag));
ret = AVERROR_INVALIDDATA;
packet_read = 1;
break;
}
}
return ret;
}
static int ea_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
EaDemuxContext *ea = s->priv_data;
AVIOContext *pb = s->pb;
int ret = 0;
int packet_read = 0;
int partial_packet = 0;
unsigned int chunk_type, chunk_size;
int key = 0;
int av_uninit(num_samples);
while (!packet_read || partial_packet) {
chunk_type = avio_rl32(pb);
chunk_size = (ea->big_endian ? avio_rb32(pb) : avio_rl32(pb)) - 8;
switch (chunk_type) {
/* audio data */
case ISNh_TAG:
/* header chunk also contains data; skip over the header portion*/
avio_skip(pb, 32);
chunk_size -= 32;
case ISNd_TAG:
case SCDl_TAG:
case SNDC_TAG:
case SDEN_TAG:
if (!ea->audio_codec) {
avio_skip(pb, chunk_size);
break;
} else if (ea->audio_codec == CODEC_ID_PCM_S16LE_PLANAR ||
ea->audio_codec == CODEC_ID_MP3) {
num_samples = avio_rl32(pb);
avio_skip(pb, 8);
chunk_size -= 12;
}
if (partial_packet) {
av_log_ask_for_sample(s, "video header followed by audio packet not supported.\n");
av_free_packet(pkt);
partial_packet = 0;
}
ret = av_get_packet(pb, pkt, chunk_size);
if (ret < 0)
return ret;
pkt->stream_index = ea->audio_stream_index;
switch (ea->audio_codec) {
case CODEC_ID_ADPCM_EA:
case CODEC_ID_ADPCM_EA_R1:
case CODEC_ID_ADPCM_EA_R2:
case CODEC_ID_ADPCM_IMA_EA_EACS:
pkt->duration = AV_RL32(pkt->data);
break;
case CODEC_ID_ADPCM_EA_R3:
pkt->duration = AV_RB32(pkt->data);
break;
case CODEC_ID_ADPCM_IMA_EA_SEAD:
pkt->duration = ret * 2 / ea->num_channels;
break;
case CODEC_ID_PCM_S16LE_PLANAR:
case CODEC_ID_MP3:
pkt->duration = num_samples;
break;
default:
pkt->duration = chunk_size / (ea->bytes * ea->num_channels);
}
packet_read = 1;
break;
/* ending tag */
case 0:
case ISNe_TAG:
case SCEl_TAG:
case SEND_TAG:
case SEEN_TAG:
ret = AVERROR(EIO);
packet_read = 1;
break;
case MVIh_TAG:
case kVGT_TAG:
case pQGT_TAG:
case TGQs_TAG:
case MADk_TAG:
key = AV_PKT_FLAG_KEY;
case MVIf_TAG:
case fVGT_TAG:
case MADm_TAG:
case MADe_TAG:
avio_seek(pb, -8, SEEK_CUR); // include chunk preamble
chunk_size += 8;
goto get_video_packet;
case mTCD_TAG:
avio_skip(pb, 8); // skip ea dct header
chunk_size -= 8;
goto get_video_packet;
case MV0K_TAG:
case MPCh_TAG:
case pIQT_TAG:
key = AV_PKT_FLAG_KEY;
case MV0F_TAG:
get_video_packet:
if (partial_packet) {
ret = av_append_packet(pb, pkt, chunk_size);
} else
ret = av_get_packet(pb, pkt, chunk_size);
if (ret < 0) {
packet_read = 1;
break;
}
partial_packet = chunk_type == MVIh_TAG;
pkt->stream_index = ea->video_stream_index;
pkt->flags |= key;
packet_read = 1;
break;
default:
avio_skip(pb, chunk_size);
break;
}
}
if (ret < 0 && partial_packet)
av_free_packet(pkt);
return ret;
}
