41 probe_packet->
buf[6] &&
42 probe_packet->
buf[7] &&
43 !(probe_packet->
buf[8] & 1) &&
44 !(probe_packet->
buf[10] & 1))
56 AVStream *audio_stream, *video_stream;
73 audio_dec = audio_stream->
codec;
80 video_dec = video_stream->
codec;
87 yop->frame_size =
avio_r8(pb) * 2048;
97 yop->palette_size = video_dec->
extradata[0] * 3 + 4;
101 if (yop->audio_block_length < 920 ||
102 yop->audio_block_length + yop->palette_size >= yop->frame_size) {
120 int actual_video_data_size = yop->frame_size -
121 yop->audio_block_length - yop->palette_size;
123 yop->video_packet.stream_index = 1;
125 if (yop->video_packet.data) {
126 *pkt = yop->video_packet;
127 yop->video_packet.data =
NULL;
128 yop->video_packet.size = 0;
129 pkt->
data[0] = yop->odd_frame;
135 yop->frame_size - yop->audio_block_length);
141 ret =
avio_read(pb, yop->video_packet.data, yop->palette_size);
144 }
else if (ret < yop->palette_size) {
154 pkt->
pos = yop->video_packet.pos;
156 avio_skip(pb, yop->audio_block_length - ret);
158 ret =
avio_read(pb, yop->video_packet.data + yop->palette_size,
159 actual_video_data_size);
162 else if (ret < actual_video_data_size)
166 return yop->audio_block_length;
181 int64_t timestamp,
int flags)
184 int64_t frame_pos, pos_min, pos_max;
194 frame_count = (pos_max - pos_min) / yop->frame_size;
196 timestamp =
FFMAX(0,
FFMIN(frame_count, timestamp));
198 frame_pos = timestamp * yop->frame_size + pos_min;
199 yop->odd_frame = timestamp & 1;