/*
- * FFM (ffserver live feed) demuxer
- * Copyright (c) 2001 Fabrice Bellard.
+ * FFM (avserver live feed) demuxer
+ * Copyright (c) 2001 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/intreadwrite.h"
+#include "libavutil/intfloat.h"
#include "avformat.h"
+#include "internal.h"
#include "ffm.h"
-#ifdef CONFIG_FFSERVER
-#include <unistd.h>
-
-offset_t ffm_read_write_index(int fd)
-{
- uint8_t buf[8];
-
- lseek(fd, 8, SEEK_SET);
- read(fd, buf, 8);
- return AV_RB64(buf);
-}
-
-void ffm_write_write_index(int fd, offset_t pos)
-{
- uint8_t buf[8];
- int i;
-
- for(i=0;i<8;i++)
- buf[i] = (pos >> (56 - i * 8)) & 0xff;
- lseek(fd, 8, SEEK_SET);
- write(fd, buf, 8);
-}
-
-void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size)
-{
- FFMContext *ffm = s->priv_data;
- ffm->write_index = pos;
- ffm->file_size = file_size;
-}
-#endif // CONFIG_FFSERVER
static int ffm_is_avail_data(AVFormatContext *s, int size)
{
FFMContext *ffm = s->priv_data;
- offset_t pos, avail_size;
+ int64_t pos, avail_size;
int len;
len = ffm->packet_end - ffm->packet_ptr;
if (size <= len)
return 1;
- pos = url_ftell(s->pb);
+ pos = avio_tell(s->pb);
+ if (!ffm->write_index) {
+ if (pos == ffm->file_size)
+ return AVERROR_EOF;
+ avail_size = ffm->file_size - pos;
+ } else {
if (pos == ffm->write_index) {
/* exactly at the end of stream */
- return 0;
+ return AVERROR(EAGAIN);
} else if (pos < ffm->write_index) {
avail_size = ffm->write_index - pos;
} else {
avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
}
+ }
avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
if (size <= avail_size)
return 1;
else
- return 0;
+ return AVERROR(EAGAIN);
+}
+
+static int ffm_resync(AVFormatContext *s, int state)
+{
+ av_log(s, AV_LOG_ERROR, "resyncing\n");
+ while (state != PACKET_ID) {
+ if (s->pb->eof_reached) {
+ av_log(s, AV_LOG_ERROR, "cannot find FFM syncword\n");
+ return -1;
+ }
+ state = (state << 8) | avio_r8(s->pb);
+ }
+ return 0;
}
/* first is true if we read the frame header */
static int ffm_read_data(AVFormatContext *s,
- uint8_t *buf, int size, int first)
+ uint8_t *buf, int size, int header)
{
FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- int len, fill_size, size1, frame_offset;
+ AVIOContext *pb = s->pb;
+ int len, fill_size, size1, frame_offset, id;
size1 = size;
while (size > 0) {
if (len > size)
len = size;
if (len == 0) {
- if (url_ftell(pb) == ffm->file_size)
- url_fseek(pb, ffm->packet_size, SEEK_SET);
+ if (avio_tell(pb) == ffm->file_size)
+ avio_seek(pb, ffm->packet_size, SEEK_SET);
retry_read:
- get_be16(pb); /* PACKET_ID */
- fill_size = get_be16(pb);
- ffm->pts = get_be64(pb);
- ffm->first_frame_in_packet = 1;
- frame_offset = get_be16(pb);
- get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
+ id = avio_rb16(pb); /* PACKET_ID */
+ if (id != PACKET_ID)
+ if (ffm_resync(s, id) < 0)
+ return -1;
+ fill_size = avio_rb16(pb);
+ ffm->dts = avio_rb64(pb);
+ frame_offset = avio_rb16(pb);
+ avio_read(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 || frame_offset < 0)
return -1;
if (ffm->first_packet || (frame_offset & 0x8000)) {
if (!frame_offset) {
/* This packet has no frame headers in it */
- if (url_ftell(pb) >= ffm->packet_size * 3) {
- url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR);
+ if (avio_tell(pb) >= ffm->packet_size * 3) {
+ avio_seek(pb, -ffm->packet_size * 2, SEEK_CUR);
goto retry_read;
}
/* This is bad, we cannot find a valid frame header */
return 0;
}
ffm->first_packet = 0;
- if ((frame_offset & 0x7ffff) < FFM_HEADER_SIZE)
+ if ((frame_offset & 0x7fff) < FFM_HEADER_SIZE)
return -1;
ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
- if (!first)
+ if (!header)
break;
} else {
ffm->packet_ptr = ffm->packet;
buf += len;
ffm->packet_ptr += len;
size -= len;
- first = 0;
+ header = 0;
}
return size1 - size;
}
-//#define DEBUG_SEEK
-
-/* pos is between 0 and file_size - FFM_PACKET_SIZE. It is translated
- by the write position inside this function */
-static void ffm_seek1(AVFormatContext *s, offset_t pos1)
+/* ensure that acutal seeking happens between FFM_PACKET_SIZE
+ and file_size - FFM_PACKET_SIZE */
+static int64_t ffm_seek1(AVFormatContext *s, int64_t pos1)
{
FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- offset_t pos;
-
- pos = pos1 + ffm->write_index;
- if (pos >= ffm->file_size)
- pos -= (ffm->file_size - FFM_PACKET_SIZE);
-#ifdef DEBUG_SEEK
- printf("seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
-#endif
- url_fseek(pb, pos, SEEK_SET);
+ AVIOContext *pb = s->pb;
+ int64_t pos;
+
+ pos = FFMIN(pos1, ffm->file_size - FFM_PACKET_SIZE);
+ pos = FFMAX(pos, FFM_PACKET_SIZE);
+ av_dlog(s, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
+ return avio_seek(pb, pos, SEEK_SET);
}
-static int64_t get_pts(AVFormatContext *s, offset_t pos)
+static int64_t get_dts(AVFormatContext *s, int64_t pos)
{
- ByteIOContext *pb = s->pb;
- int64_t pts;
+ AVIOContext *pb = s->pb;
+ int64_t dts;
ffm_seek1(s, pos);
- url_fskip(pb, 4);
- pts = get_be64(pb);
-#ifdef DEBUG_SEEK
- printf("pts=%0.6f\n", pts / 1000000.0);
-#endif
- return pts;
+ avio_skip(pb, 4);
+ dts = avio_rb64(pb);
+ av_dlog(s, "dts=%0.6f\n", dts / 1000000.0);
+ return dts;
}
static void adjust_write_index(AVFormatContext *s)
{
FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int64_t pts;
- //offset_t orig_write_index = ffm->write_index;
- offset_t pos_min, pos_max;
+ //int64_t orig_write_index = ffm->write_index;
+ int64_t pos_min, pos_max;
int64_t pts_start;
- offset_t ptr = url_ftell(pb);
+ int64_t ptr = avio_tell(pb);
pos_min = 0;
pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
- pts_start = get_pts(s, pos_min);
+ pts_start = get_dts(s, pos_min);
- pts = get_pts(s, pos_max);
+ pts = get_dts(s, pos_max);
if (pts - 100000 > pts_start)
goto end;
ffm->write_index = FFM_PACKET_SIZE;
- pts_start = get_pts(s, pos_min);
+ pts_start = get_dts(s, pos_min);
- pts = get_pts(s, pos_max);
+ pts = get_dts(s, pos_max);
if (pts - 100000 <= pts_start) {
while (1) {
- offset_t newpos;
+ int64_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);
+ newpts = get_dts(s, newpos);
if (newpts - 100000 <= pts) {
pos_max = newpos;
ffm->write_index += pos_max;
}
- //printf("Adjusted write index from %"PRId64" to %"PRId64": 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);
+ avio_seek(pb, ptr, SEEK_SET);
+}
+
+
+static int ffm_close(AVFormatContext *s)
+{
+ int i;
+
+ for (i = 0; i < s->nb_streams; i++)
+ av_freep(&s->streams[i]->codec->rc_eq);
+
+ return 0;
}
-static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int ffm_read_header(AVFormatContext *s)
{
FFMContext *ffm = s->priv_data;
AVStream *st;
- FFMStream *fst;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVCodecContext *codec;
int i, nb_streams;
uint32_t tag;
/* header */
- tag = get_le32(pb);
+ tag = avio_rl32(pb);
if (tag != MKTAG('F', 'F', 'M', '1'))
goto fail;
- ffm->packet_size = get_be32(pb);
+ ffm->packet_size = avio_rb32(pb);
if (ffm->packet_size != FFM_PACKET_SIZE)
goto fail;
- ffm->write_index = get_be64(pb);
+ ffm->write_index = avio_rb64(pb);
/* get also filesize */
- if (!url_is_streamed(pb)) {
- ffm->file_size = url_fsize(pb);
- adjust_write_index(s);
+ if (pb->seekable) {
+ ffm->file_size = avio_size(pb);
+ if (ffm->write_index)
+ adjust_write_index(s);
} else {
ffm->file_size = (UINT64_C(1) << 63) - 1;
}
- nb_streams = get_be32(pb);
- get_be32(pb); /* total bitrate */
+ nb_streams = avio_rb32(pb);
+ avio_rb32(pb); /* total bitrate */
/* read each stream */
for(i=0;i<nb_streams;i++) {
char rc_eq_buf[128];
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
goto fail;
- fst = av_mallocz(sizeof(FFMStream));
- if (!fst)
- goto fail;
- s->streams[i] = st;
- av_set_pts_info(st, 64, 1, 1000000);
-
- st->priv_data = fst;
+ avpriv_set_pts_info(st, 64, 1, 1000000);
codec = st->codec;
/* generic info */
- codec->codec_id = get_be32(pb);
- codec->codec_type = get_byte(pb); /* codec_type */
- codec->bit_rate = get_be32(pb);
- st->quality = get_be32(pb);
- codec->flags = get_be32(pb);
- codec->flags2 = get_be32(pb);
- codec->debug = get_be32(pb);
+ codec->codec_id = avio_rb32(pb);
+ codec->codec_type = avio_r8(pb); /* codec_type */
+ codec->bit_rate = avio_rb32(pb);
+ codec->flags = avio_rb32(pb);
+ codec->flags2 = avio_rb32(pb);
+ codec->debug = avio_rb32(pb);
/* specific info */
switch(codec->codec_type) {
- case CODEC_TYPE_VIDEO:
- codec->time_base.num = get_be32(pb);
- codec->time_base.den = get_be32(pb);
- codec->width = get_be16(pb);
- codec->height = get_be16(pb);
- codec->gop_size = get_be16(pb);
- codec->pix_fmt = get_be32(pb);
- codec->qmin = get_byte(pb);
- codec->qmax = get_byte(pb);
- codec->max_qdiff = get_byte(pb);
- codec->qcompress = get_be16(pb) / 10000.0;
- codec->qblur = get_be16(pb) / 10000.0;
- codec->bit_rate_tolerance = get_be32(pb);
- codec->rc_eq = av_strdup(get_strz(pb, rc_eq_buf, sizeof(rc_eq_buf)));
- codec->rc_max_rate = get_be32(pb);
- codec->rc_min_rate = get_be32(pb);
- codec->rc_buffer_size = get_be32(pb);
- codec->i_quant_factor = av_int2dbl(get_be64(pb));
- codec->b_quant_factor = av_int2dbl(get_be64(pb));
- codec->i_quant_offset = av_int2dbl(get_be64(pb));
- codec->b_quant_offset = av_int2dbl(get_be64(pb));
- codec->dct_algo = get_be32(pb);
- codec->strict_std_compliance = get_be32(pb);
- codec->max_b_frames = get_be32(pb);
- codec->luma_elim_threshold = get_be32(pb);
- codec->chroma_elim_threshold = get_be32(pb);
- codec->mpeg_quant = get_be32(pb);
- codec->intra_dc_precision = get_be32(pb);
- codec->me_method = get_be32(pb);
- codec->mb_decision = get_be32(pb);
- codec->nsse_weight = get_be32(pb);
- codec->frame_skip_cmp = get_be32(pb);
- codec->rc_buffer_aggressivity = av_int2dbl(get_be64(pb));
- codec->codec_tag = get_be32(pb);
+ case AVMEDIA_TYPE_VIDEO:
+ codec->time_base.num = avio_rb32(pb);
+ codec->time_base.den = avio_rb32(pb);
+ codec->width = avio_rb16(pb);
+ codec->height = avio_rb16(pb);
+ codec->gop_size = avio_rb16(pb);
+ codec->pix_fmt = avio_rb32(pb);
+ codec->qmin = avio_r8(pb);
+ codec->qmax = avio_r8(pb);
+ codec->max_qdiff = avio_r8(pb);
+ codec->qcompress = avio_rb16(pb) / 10000.0;
+ codec->qblur = avio_rb16(pb) / 10000.0;
+ codec->bit_rate_tolerance = avio_rb32(pb);
+ avio_get_str(pb, INT_MAX, rc_eq_buf, sizeof(rc_eq_buf));
+ codec->rc_eq = av_strdup(rc_eq_buf);
+ codec->rc_max_rate = avio_rb32(pb);
+ codec->rc_min_rate = avio_rb32(pb);
+ codec->rc_buffer_size = avio_rb32(pb);
+ codec->i_quant_factor = av_int2double(avio_rb64(pb));
+ codec->b_quant_factor = av_int2double(avio_rb64(pb));
+ codec->i_quant_offset = av_int2double(avio_rb64(pb));
+ codec->b_quant_offset = av_int2double(avio_rb64(pb));
+ codec->dct_algo = avio_rb32(pb);
+ codec->strict_std_compliance = avio_rb32(pb);
+ codec->max_b_frames = avio_rb32(pb);
+ codec->mpeg_quant = avio_rb32(pb);
+ codec->intra_dc_precision = avio_rb32(pb);
+ codec->me_method = avio_rb32(pb);
+ codec->mb_decision = avio_rb32(pb);
+ codec->nsse_weight = avio_rb32(pb);
+ codec->frame_skip_cmp = avio_rb32(pb);
+ codec->rc_buffer_aggressivity = av_int2double(avio_rb64(pb));
+ codec->codec_tag = avio_rb32(pb);
+ codec->thread_count = avio_r8(pb);
+ codec->coder_type = avio_rb32(pb);
+ codec->me_cmp = avio_rb32(pb);
+ codec->me_subpel_quality = avio_rb32(pb);
+ codec->me_range = avio_rb32(pb);
+ codec->keyint_min = avio_rb32(pb);
+ codec->scenechange_threshold = avio_rb32(pb);
+ codec->b_frame_strategy = avio_rb32(pb);
+ codec->qcompress = av_int2double(avio_rb64(pb));
+ codec->qblur = av_int2double(avio_rb64(pb));
+ codec->max_qdiff = avio_rb32(pb);
+ codec->refs = avio_rb32(pb);
break;
- case CODEC_TYPE_AUDIO:
- codec->sample_rate = get_be32(pb);
- codec->channels = get_le16(pb);
- codec->frame_size = get_le16(pb);
+ case AVMEDIA_TYPE_AUDIO:
+ codec->sample_rate = avio_rb32(pb);
+ codec->channels = avio_rl16(pb);
+ codec->frame_size = avio_rl16(pb);
break;
default:
goto fail;
}
-
+ if (codec->flags & CODEC_FLAG_GLOBAL_HEADER) {
+ codec->extradata_size = avio_rb32(pb);
+ codec->extradata = av_malloc(codec->extradata_size);
+ if (!codec->extradata)
+ return AVERROR(ENOMEM);
+ avio_read(pb, codec->extradata, codec->extradata_size);
+ }
}
/* get until end of block reached */
- while ((url_ftell(pb) % ffm->packet_size) != 0)
- get_byte(pb);
+ while ((avio_tell(pb) % ffm->packet_size) != 0)
+ avio_r8(pb);
/* init packet demux */
ffm->packet_ptr = ffm->packet;
ffm->packet_end = ffm->packet;
ffm->frame_offset = 0;
- ffm->pts = 0;
+ ffm->dts = 0;
ffm->read_state = READ_HEADER;
ffm->first_packet = 1;
return 0;
fail:
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- if (st) {
- av_freep(&st->priv_data);
- av_free(st);
- }
- }
+ ffm_close(s);
return -1;
}
{
int size;
FFMContext *ffm = s->priv_data;
- int duration;
+ int duration, ret;
switch(ffm->read_state) {
case READ_HEADER:
- if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
- return AVERROR(EAGAIN);
- }
- dprintf(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
- url_ftell(s->pb), s->pb.pos, ffm->write_index, ffm->file_size);
+ if ((ret = ffm_is_avail_data(s, FRAME_HEADER_SIZE+4)) < 0)
+ return ret;
+
+ av_dlog(s, "pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
+ avio_tell(s->pb), s->pb->pos, ffm->write_index, ffm->file_size);
if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
FRAME_HEADER_SIZE)
- return AVERROR(EAGAIN);
-#if 0
- {
- int i;
- for(i=0;i<FRAME_HEADER_SIZE;i++)
- printf("%02x ", ffm->header[i]);
- printf("\n");
- }
-#endif
+ return -1;
+ if (ffm->header[1] & FLAG_DTS)
+ if (ffm_read_data(s, ffm->header+16, 4, 1) != 4)
+ return -1;
ffm->read_state = READ_DATA;
/* fall thru */
case READ_DATA:
size = AV_RB24(ffm->header + 2);
- if (!ffm_is_avail_data(s, size)) {
- return AVERROR(EAGAIN);
- }
+ if ((ret = ffm_is_avail_data(s, size)) < 0)
+ return ret;
duration = AV_RB24(ffm->header + 5);
av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
av_free_packet(pkt);
ffm->read_state = READ_HEADER;
- return AVERROR(EAGAIN);
+ return -1;
}
- pkt->pos = url_ftell(s->pb);
+ pkt->pos = avio_tell(s->pb);
if (ffm->header[1] & FLAG_KEY_FRAME)
- pkt->flags |= PKT_FLAG_KEY;
+ pkt->flags |= AV_PKT_FLAG_KEY;
ffm->read_state = READ_HEADER;
if (ffm_read_data(s, pkt->data, size, 0) != size) {
/* bad case: desynchronized packet. we cancel all the packet loading */
av_free_packet(pkt);
- return AVERROR(EAGAIN);
- }
- if (ffm->first_frame_in_packet)
- {
- pkt->pts = ffm->pts;
- ffm->first_frame_in_packet = 0;
+ return -1;
}
+ pkt->pts = AV_RB64(ffm->header+8);
+ if (ffm->header[1] & FLAG_DTS)
+ pkt->dts = pkt->pts - AV_RB32(ffm->header+16);
+ else
+ pkt->dts = pkt->pts;
pkt->duration = duration;
break;
}
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;
+ int64_t pos_min, pos_max, pos;
int64_t pts_min, pts_max, pts;
double pos1;
-#ifdef DEBUG_SEEK
- printf("wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
-#endif
+ av_dlog(s, "wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
/* find the position using linear interpolation (better than
dichotomy in typical cases) */
- pos_min = 0;
- pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
+ pos_min = FFM_PACKET_SIZE;
+ pos_max = ffm->file_size - FFM_PACKET_SIZE;
while (pos_min <= pos_max) {
- pts_min = get_pts(s, pos_min);
- pts_max = get_pts(s, pos_max);
+ pts_min = get_dts(s, pos_min);
+ pts_max = get_dts(s, pos_max);
/* linear interpolation */
pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
(double)(pts_max - pts_min);
pos = pos_min;
else if (pos >= pos_max)
pos = pos_max;
- pts = get_pts(s, pos);
+ pts = get_dts(s, pos);
/* check if we are lucky */
if (pts == wanted_pts) {
goto found;
}
}
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
- if (pos > 0)
- pos -= FFM_PACKET_SIZE;
+
found:
- ffm_seek1(s, pos);
- return 0;
-}
+ if (ffm_seek1(s, pos) < 0)
+ return -1;
-static int ffm_read_close(AVFormatContext *s)
-{
- AVStream *st;
- int i;
+ /* reset read state */
+ ffm->read_state = READ_HEADER;
+ ffm->packet_ptr = ffm->packet;
+ ffm->packet_end = ffm->packet;
+ ffm->first_packet = 1;
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- av_freep(&st->priv_data);
- }
return 0;
}
return 0;
}
-AVInputFormat ffm_demuxer = {
- "ffm",
- "ffm format",
- sizeof(FFMContext),
- ffm_probe,
- ffm_read_header,
- ffm_read_packet,
- ffm_read_close,
- ffm_seek,
+AVInputFormat ff_ffm_demuxer = {
+ .name = "ffm",
+ .long_name = NULL_IF_CONFIG_SMALL("FFM (AVserver live feed)"),
+ .priv_data_size = sizeof(FFMContext),
+ .read_probe = ffm_probe,
+ .read_header = ffm_read_header,
+ .read_packet = ffm_read_packet,
+ .read_close = ffm_close,
+ .read_seek = ffm_seek,
};