static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
{
SIFFContext *c = s->priv_data;
int size;
if (c->has_video){
if (c->cur_frame >= c->frames)
return AVERROR(EIO);
if (c->curstrm == -1){
c->pktsize = avio_rl32(s->pb) - 4;
c->flags = avio_rl16(s->pb);
c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
if (c->gmcsize)
avio_read(s->pb, c->gmc, c->gmcsize);
c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb): 0;
c->curstrm = !!(c->flags & VB_HAS_AUDIO);
}
if (!c->curstrm){
size = c->pktsize - c->sndsize - c->gmcsize - 2;
size = ffio_limit(s->pb, size);
if(size < 0 || c->pktsize < c->sndsize)
return AVERROR_INVALIDDATA;
if (av_new_packet(pkt, size + c->gmcsize + 2) < 0)
return AVERROR(ENOMEM);
AV_WL16(pkt->data, c->flags);
if (c->gmcsize)
memcpy(pkt->data + 2, c->gmc, c->gmcsize);
avio_read(s->pb, pkt->data + 2 + c->gmcsize, size);
pkt->stream_index = 0;
c->curstrm = -1;
}else{
if ((size = av_get_packet(s->pb, pkt, c->sndsize - 4)) < 0)
return AVERROR(EIO);
pkt->stream_index = 1;
pkt->duration = size;
c->curstrm = 0;
}
if(!c->cur_frame || c->curstrm)
pkt->flags |= AV_PKT_FLAG_KEY;
if (c->curstrm == -1)
c->cur_frame++;
}else{
size = av_get_packet(s->pb, pkt, c->block_align);
if(size <= 0)
return AVERROR(EIO);
pkt->duration = size;
}
return pkt->size;
}
static int cin_read_packet(AVFormatContext *s, AVPacket *pkt)
{
CinDemuxContext *cin = s->priv_data;
AVIOContext *pb = s->pb;
CinFrameHeader *hdr = &cin->frame_header;
int rc, palette_type, pkt_size;
int ret;
if (cin->audio_buffer_size == 0) {
rc = cin_read_frame_header(cin, pb);
if (rc)
return rc;
if ((int16_t)hdr->pal_colors_count < 0) {
hdr->pal_colors_count = -(int16_t)hdr->pal_colors_count;
palette_type = 1;
} else {
palette_type = 0;
}
/* palette and video packet */
pkt_size = (palette_type + 3) * hdr->pal_colors_count + hdr->video_frame_size;
pkt_size = ffio_limit(pb, pkt_size);
ret = av_new_packet(pkt, 4 + pkt_size);
if (ret < 0)
return ret;
pkt->stream_index = cin->video_stream_index;
pkt->pts = cin->video_stream_pts++;
pkt->data[0] = palette_type;
pkt->data[1] = hdr->pal_colors_count & 0xFF;
pkt->data[2] = hdr->pal_colors_count >> 8;
pkt->data[3] = hdr->video_frame_type;
ret = avio_read(pb, &pkt->data[4], pkt_size);
if (ret < 0) {
av_free_packet(pkt);
return ret;
}
if (ret < pkt_size)
av_shrink_packet(pkt, 4 + ret);
/* sound buffer will be processed on next read_packet() call */
cin->audio_buffer_size = hdr->audio_frame_size;
return 0;
}
static int append_packet_chunked_with_pts(AVIOContext *s, AVPacket *pkt, int explicit_pts, int64_t *pts, int size)
{
int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
int orig_size = pkt->size;
int ret;
do {
int prev_size = pkt->size;
int read_size;
/* When the caller requests a lot of data, limit it to the amount
* left in file or SANE_CHUNK_SIZE when it is not known. */
read_size = size;
if (read_size > SANE_CHUNK_SIZE/10) {
read_size = ffio_limit(s, read_size);
// If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE
if (s->maxsize < 0)
read_size = FFMIN(read_size, SANE_CHUNK_SIZE);
}
ret = av_grow_packet(pkt, read_size);
if (ret < 0)
break;
ret = avio_read(s, (unsigned char*)pts, sizeof(int64_t));
if (ret != sizeof(int64_t)) {
av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
break;
}
ret = avio_read(s, pkt->data + prev_size, read_size);
if (ret != read_size) {
av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
break;
}
size -= read_size;
} while (size > 0);
if (size > 0)
pkt->flags |= AV_PKT_FLAG_CORRUPT;
pkt->pos = orig_pos;
if (!pkt->size)
av_free_packet(pkt);
return pkt->size > orig_size ? pkt->size - orig_size : ret;
}
static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
RMDemuxContext *rm, RMStream *vst,
AVPacket *pkt, int len, int *pseq,
int64_t *timestamp)
{
int hdr;
int seq = 0, pic_num = 0, len2 = 0, pos = 0; //init to silcense compiler warning
int type;
int ret;
hdr = avio_r8(pb); len--;
type = hdr >> 6;
if(type != 3){ // not frame as a part of packet
seq = avio_r8(pb); len--;
}
if(type != 1){ // not whole frame
len2 = get_num(pb, &len);
pos = get_num(pb, &len);
pic_num = avio_r8(pb); len--;
}
if(len<0) {
av_log(s, AV_LOG_ERROR, "Insufficient data\n");
return -1;
}
rm->remaining_len = len;
if(type&1){ // frame, not slice
if(type == 3){ // frame as a part of packet
len= len2;
*timestamp = pos;
}
if(rm->remaining_len < len) {
av_log(s, AV_LOG_ERROR, "Insufficient remaining len\n");
return -1;
}
rm->remaining_len -= len;
if(av_new_packet(pkt, len + 9) < 0)
return AVERROR(EIO);
pkt->data[0] = 0;
AV_WL32(pkt->data + 1, 1);
AV_WL32(pkt->data + 5, 0);
if ((ret = avio_read(pb, pkt->data + 9, len)) != len) {
av_free_packet(pkt);
av_log(s, AV_LOG_ERROR, "Failed to read %d bytes\n", len);
return ret < 0 ? ret : AVERROR(EIO);
}
return 0;
}
//now we have to deal with single slice
*pseq = seq;
if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
if (len2 > ffio_limit(pb, len2)) {
av_log(s, AV_LOG_ERROR, "Impossibly sized packet\n");
return AVERROR_INVALIDDATA;
}
vst->slices = ((hdr & 0x3F) << 1) + 1;
vst->videobufsize = len2 + 8*vst->slices + 1;
av_free_packet(&vst->pkt); //FIXME this should be output.
if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
return AVERROR(ENOMEM);
memset(vst->pkt.data, 0, vst->pkt.size);
vst->videobufpos = 8*vst->slices + 1;
vst->cur_slice = 0;
vst->curpic_num = pic_num;
vst->pktpos = avio_tell(pb);
}
if(type == 2)
len = FFMIN(len, pos);
if(++vst->cur_slice > vst->slices) {
av_log(s, AV_LOG_ERROR, "cur slice %d, too large\n", vst->cur_slice);
return 1;
}
if(!vst->pkt.data)
return AVERROR(ENOMEM);
AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
if(vst->videobufpos + len > vst->videobufsize) {
av_log(s, AV_LOG_ERROR, "outside videobufsize\n");
return 1;
}
if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
return AVERROR(EIO);
vst->videobufpos += len;
rm->remaining_len-= len;
if (type == 2 || vst->videobufpos == vst->videobufsize) {
vst->pkt.data[0] = vst->cur_slice-1;
*pkt= vst->pkt;
vst->pkt.data= NULL;
vst->pkt.size= 0;
vst->pkt.buf = NULL;
#if FF_API_DESTRUCT_PACKET
FF_DISABLE_DEPRECATION_WARNINGS
vst->pkt.destruct = NULL;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
vst->videobufpos - 1 - 8*vst->slices);
pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
pkt->pts = AV_NOPTS_VALUE;
pkt->pos = vst->pktpos;
vst->slices = 0;
return 0;
}
static int roq_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
RoqDemuxContext *roq = s->priv_data;
AVIOContext *pb = s->pb;
int ret = 0;
unsigned int chunk_size;
unsigned int chunk_type;
unsigned int codebook_size;
unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
int packet_read = 0;
int64_t codebook_offset;
while (!packet_read) {
if (avio_feof(s->pb))
return AVERROR(EIO);
/* get the next chunk preamble */
if ((ret = avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) !=
RoQ_CHUNK_PREAMBLE_SIZE)
return AVERROR(EIO);
chunk_type = AV_RL16(&preamble[0]);
chunk_size = AV_RL32(&preamble[2]);
if(chunk_size > INT_MAX)
return AVERROR_INVALIDDATA;
chunk_size = ffio_limit(pb, chunk_size);
switch (chunk_type) {
case RoQ_INFO:
if (roq->video_stream_index == -1) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 63, 1, roq->frame_rate);
roq->video_stream_index = st->index;
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_ROQ;
st->codec->codec_tag = 0; /* no fourcc */
if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != RoQ_CHUNK_PREAMBLE_SIZE)
return AVERROR(EIO);
st->codec->width = roq->width = AV_RL16(preamble);
st->codec->height = roq->height = AV_RL16(preamble + 2);
break;
}
/* don't care about this chunk anymore */
avio_skip(pb, RoQ_CHUNK_PREAMBLE_SIZE);
break;
case RoQ_QUAD_CODEBOOK:
if (roq->video_stream_index < 0)
return AVERROR_INVALIDDATA;
/* packet needs to contain both this codebook and next VQ chunk */
codebook_offset = avio_tell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
codebook_size = chunk_size;
avio_skip(pb, codebook_size);
if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
RoQ_CHUNK_PREAMBLE_SIZE)
return AVERROR(EIO);
chunk_size = AV_RL32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 +
codebook_size;
/* rewind */
avio_seek(pb, codebook_offset, SEEK_SET);
/* load up the packet */
ret= av_get_packet(pb, pkt, chunk_size);
if (ret != chunk_size)
return AVERROR(EIO);
pkt->stream_index = roq->video_stream_index;
pkt->pts = roq->video_pts++;
packet_read = 1;
break;
case RoQ_SOUND_MONO:
case RoQ_SOUND_STEREO:
if (roq->audio_stream_index == -1) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avpriv_set_pts_info(st, 32, 1, RoQ_AUDIO_SAMPLE_RATE);
roq->audio_stream_index = st->index;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_ROQ_DPCM;
st->codec->codec_tag = 0; /* no tag */
if (chunk_type == RoQ_SOUND_STEREO) {
st->codec->channels = 2;
st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
} else {
st->codec->channels = 1;
st->codec->channel_layout = AV_CH_LAYOUT_MONO;
}
roq->audio_channels = st->codec->channels;
st->codec->sample_rate = RoQ_AUDIO_SAMPLE_RATE;
st->codec->bits_per_coded_sample = 16;
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
st->codec->bits_per_coded_sample;
st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
}
case RoQ_QUAD_VQ:
if (chunk_type == RoQ_QUAD_VQ) {
if (roq->video_stream_index < 0)
return AVERROR_INVALIDDATA;
}
/* load up the packet */
if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE))
return AVERROR(EIO);
/* copy over preamble */
memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE);
if (chunk_type == RoQ_QUAD_VQ) {
pkt->stream_index = roq->video_stream_index;
pkt->pts = roq->video_pts++;
} else {
pkt->stream_index = roq->audio_stream_index;
pkt->pts = roq->audio_frame_count;
roq->audio_frame_count += (chunk_size / roq->audio_channels);
}
pkt->pos= avio_tell(pb);
ret = avio_read(pb, pkt->data + RoQ_CHUNK_PREAMBLE_SIZE,
chunk_size);
if (ret != chunk_size)
ret = AVERROR(EIO);
packet_read = 1;
break;
default:
av_log(s, AV_LOG_ERROR, " unknown RoQ chunk (%04X)\n", chunk_type);
return AVERROR_INVALIDDATA;
}
}
return ret;
}
static int film_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
FilmDemuxContext *film = s->priv_data;
AVIOContext *pb = s->pb;
film_sample *sample;
int ret = 0;
int i;
int left, right;
if (film->current_sample >= film->sample_count)
return AVERROR(EIO);
sample = &film->sample_table[film->current_sample];
/* position the stream (will probably be there anyway) */
avio_seek(pb, sample->sample_offset, SEEK_SET);
/* do a special song and dance when loading FILM Cinepak chunks */
if ((sample->stream == film->video_stream_index) &&
(film->video_type == CODEC_ID_CINEPAK)) {
pkt->pos= avio_tell(pb);
if (av_new_packet(pkt, sample->sample_size))
return AVERROR(ENOMEM);
avio_read(pb, pkt->data, sample->sample_size);
} else if ((sample->stream == film->audio_stream_index) &&
(film->audio_channels == 2) &&
(film->audio_type != CODEC_ID_ADPCM_ADX)) {
/* stereo PCM needs to be interleaved */
if (ffio_limit(pb, sample->sample_size) != sample->sample_size)
return AVERROR(EIO);
if (av_new_packet(pkt, sample->sample_size))
return AVERROR(ENOMEM);
/* make sure the interleave buffer is large enough */
if (sample->sample_size > film->stereo_buffer_size) {
av_free(film->stereo_buffer);
film->stereo_buffer_size = sample->sample_size;
film->stereo_buffer = av_malloc(film->stereo_buffer_size);
if (!film->stereo_buffer) {
film->stereo_buffer_size = 0;
return AVERROR(ENOMEM);
}
}
pkt->pos= avio_tell(pb);
ret = avio_read(pb, film->stereo_buffer, sample->sample_size);
if (ret != sample->sample_size)
ret = AVERROR(EIO);
left = 0;
right = sample->sample_size / 2;
for (i = 0; i < sample->sample_size; ) {
if (film->audio_bits == 8) {
pkt->data[i++] = film->stereo_buffer[left++];
pkt->data[i++] = film->stereo_buffer[right++];
} else {
pkt->data[i++] = film->stereo_buffer[left++];
pkt->data[i++] = film->stereo_buffer[left++];
pkt->data[i++] = film->stereo_buffer[right++];
pkt->data[i++] = film->stereo_buffer[right++];
}
}
} else {
ret= av_get_packet(pb, pkt, sample->sample_size);
if (ret != sample->sample_size)
ret = AVERROR(EIO);
}
pkt->stream_index = sample->stream;
pkt->pts = sample->pts;
film->current_sample++;
return ret;
}