uint8_t packet[FFM_PACKET_SIZE];
} FFMContext;
+static int64_t get_pts(AVFormatContext *s, offset_t pos);
+
/* disable pts hack for testing */
int ffm_nopts = 0;
+#ifdef CONFIG_ENCODERS
static void flush_packet(AVFormatContext *s)
{
FFMContext *ffm = s->priv_data;
fill_size = ffm->packet_end - ffm->packet_ptr;
memset(ffm->packet_ptr, 0, fill_size);
+ if (url_ftell(pb) % ffm->packet_size)
+ av_abort();
+
/* put header */
put_be16(pb, PACKET_ID);
put_be16(pb, fill_size);
/* 'first' is true if first data of a frame */
static void ffm_write_data(AVFormatContext *s,
- uint8_t *buf, int size,
+ const uint8_t *buf, int size,
int64_t pts, int first)
{
FFMContext *ffm = s->priv_data;
fst = av_mallocz(sizeof(FFMStream));
if (!fst)
goto fail;
+ av_set_pts_info(st, 64, 1, 1000000);
st->priv_data = fst;
codec = &st->codec;
put_le16(pb, codec->frame_size);
break;
default:
- av_abort();
+ return -1;
}
/* hack to have real time */
if (ffm_nopts)
/* init packet mux */
ffm->packet_ptr = ffm->packet;
ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
+ assert(ffm->packet_end >= ffm->packet);
ffm->frame_offset = 0;
ffm->pts = 0;
ffm->first_packet = 1;
return -1;
}
-static int ffm_write_packet(AVFormatContext *s, int stream_index,
- uint8_t *buf, int size, int force_pts)
+static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
{
- AVStream *st = s->streams[stream_index];
+ AVStream *st = s->streams[pkt->stream_index];
FFMStream *fst = st->priv_data;
int64_t pts;
uint8_t header[FRAME_HEADER_SIZE];
int duration;
+ int size= pkt->size;
+ //XXX/FIXME use duration from pkt
if (st->codec.codec_type == CODEC_TYPE_AUDIO) {
duration = ((float)st->codec.frame_size / st->codec.sample_rate * 1000000.0);
} else {
pts = fst->pts;
/* packet size & key_frame */
- header[0] = stream_index;
+ header[0] = pkt->stream_index;
header[1] = 0;
- if (st->codec.coded_frame->key_frame) //if st->codec.coded_frame==NULL then there is a bug somewhere else
+ if (pkt->flags & PKT_FLAG_KEY)
header[1] |= FLAG_KEY_FRAME;
header[2] = (size >> 16) & 0xff;
header[3] = (size >> 8) & 0xff;
header[6] = (duration >> 8) & 0xff;
header[7] = duration & 0xff;
ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1);
- ffm_write_data(s, buf, size, pts, 0);
+ ffm_write_data(s, pkt->data, size, pts, 0);
fst->pts += duration;
return 0;
put_flush_packet(pb);
}
- for(i=0;i<s->nb_streams;i++)
- av_freep(&s->streams[i]->priv_data);
return 0;
}
+#endif //CONFIG_ENCODERS
/* ffm demux */
frame_offset = get_be16(pb);
get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
+ if (ffm->packet_end < ffm->packet)
+ return -1;
/* if first packet or resynchronization packet, we must
handle it specifically */
if (ffm->first_packet || (frame_offset & 0x8000)) {
}
ffm->first_packet = 0;
if ((frame_offset & 0x7ffff) < FFM_HEADER_SIZE)
- av_abort();
+ return -1;
ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
if (!first)
break;
}
+static void adjust_write_index(AVFormatContext *s)
+{
+ FFMContext *ffm = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ int64_t pts;
+ //offset_t orig_write_index = ffm->write_index;
+ offset_t pos_min, pos_max;
+ int64_t pts_start;
+ offset_t ptr = url_ftell(pb);
+
+
+ pos_min = 0;
+ pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
+
+ pts_start = get_pts(s, pos_min);
+
+ pts = get_pts(s, pos_max);
+
+ if (pts - 100000 > pts_start)
+ goto end;
+
+ ffm->write_index = FFM_PACKET_SIZE;
+
+ pts_start = get_pts(s, pos_min);
+
+ pts = get_pts(s, pos_max);
+
+ if (pts - 100000 <= pts_start) {
+ while (1) {
+ offset_t newpos;
+ int64_t newpts;
+
+ newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
+
+ if (newpos == pos_min)
+ break;
+
+ newpts = get_pts(s, newpos);
+
+ if (newpts - 100000 <= pts) {
+ pos_max = newpos;
+ pts = newpts;
+ } else {
+ pos_min = newpos;
+ }
+ }
+ ffm->write_index += pos_max;
+ }
+
+ //printf("Adjusted write index from %lld to %lld: pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.);
+ //printf("pts range %0.6f - %0.6f\n", get_pts(s, 0) / 1000000. , get_pts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
+
+ end:
+ url_fseek(pb, ptr, SEEK_SET);
+}
+
+
static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
FFMContext *ffm = s->priv_data;
/* get also filesize */
if (!url_is_streamed(pb)) {
ffm->file_size = url_filesize(url_fileno(pb));
+ adjust_write_index(s);
} else {
ffm->file_size = (uint64_t_C(1) << 63) - 1;
}
fst = av_mallocz(sizeof(FFMStream));
if (!fst)
goto fail;
+
+ av_set_pts_info(st, 64, 1, 1000000);
+
st->priv_data = fst;
codec = &st->codec;
/* seek to a given time in the file. The file read pointer is
positionned at or before pts. XXX: the following code is quite
approximative */
-static int ffm_seek(AVFormatContext *s, int64_t wanted_pts)
+static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
{
FFMContext *ffm = s->priv_data;
offset_t pos_min, pos_max, pos;
pos_min = pos + FFM_PACKET_SIZE;
}
}
- pos = pos_min;
+ pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
if (pos > 0)
pos -= FFM_PACKET_SIZE;
found:
ffm_seek,
};
+#ifdef CONFIG_ENCODERS
static AVOutputFormat ffm_oformat = {
"ffm",
"ffm format",
ffm_write_packet,
ffm_write_trailer,
};
+#endif //CONFIG_ENCODERS
int ffm_init(void)
{
av_register_input_format(&ffm_iformat);
+#ifdef CONFIG_ENCODERS
av_register_output_format(&ffm_oformat);
+#endif //CONFIG_ENCODERS
return 0;
}
projects / ffmpeg / blobdiff