/*
* FFM (ffserver live feed) encoder and decoder
- * Copyright (c) 2001 Gerard Lantau.
+ * Copyright (c) 2001 Fabrice Bellard.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This library 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 of the License, or (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful,
+ * This library 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 General Public License for more details.
+ * 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 General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avformat.h"
#include <unistd.h>
#define PACKET_ID 0x666d
/* each packet contains frames (which can span several packets */
-#define FRAME_HEADER_SIZE 5
+#define FRAME_HEADER_SIZE 8
#define FLAG_KEY_FRAME 0x01
typedef struct FFMStream {
typedef struct FFMContext {
/* only reading mode */
offset_t write_index, file_size;
- int read_state;
+ int read_state;
UINT8 header[FRAME_HEADER_SIZE];
/* read and write */
int frame_offset;
INT64 pts;
UINT8 *packet_ptr, *packet_end;
- UINT8 packet[1]; /* must be last */
+ UINT8 packet[FFM_PACKET_SIZE];
} FFMContext;
+/* disable pts hack for testing */
+int ffm_nopts = 0;
+
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);
-
+
/* put header */
- put_be16(pb, PACKET_ID);
+ put_be16(pb, PACKET_ID);
put_be16(pb, fill_size);
put_be64(pb, ffm->pts);
h = ffm->frame_offset;
}
/* 'first' is true if first data of a frame */
-static void ffm_write_data(AVFormatContext *s,
- UINT8 *buf, int size,
+static void ffm_write_data(AVFormatContext *s,
+ UINT8 *buf, int size,
INT64 pts, int first)
{
FFMContext *ffm = s->priv_data;
if (len > size)
len = size;
memcpy(ffm->packet_ptr, buf, len);
-
+
ffm->packet_ptr += len;
buf += len;
size -= len;
static int ffm_write_header(AVFormatContext *s)
{
+ FFMContext *ffm = s->priv_data;
AVStream *st;
FFMStream *fst;
- FFMContext *ffm;
ByteIOContext *pb = &s->pb;
AVCodecContext *codec;
int bit_rate, i;
- ffm = av_mallocz(sizeof(FFMContext) + FFM_PACKET_SIZE);
- if (!ffm)
- return -1;
-
- s->priv_data = ffm;
ffm->packet_size = FFM_PACKET_SIZE;
-
+
/* header */
put_tag(pb, "FFM1");
put_be32(pb, ffm->packet_size);
/* list of streams */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
- fst = av_mallocz(sizeof(FFMStream) + ffm->packet_size);
+ fst = av_mallocz(sizeof(FFMStream));
if (!fst)
goto fail;
st->priv_data = fst;
put_be32(pb, codec->codec_id);
put_byte(pb, codec->codec_type);
put_be32(pb, codec->bit_rate);
+ put_be32(pb, codec->flags);
/* specific info */
switch(codec->codec_type) {
case CODEC_TYPE_VIDEO:
put_be32(pb, (codec->frame_rate * 1000) / FRAME_RATE_BASE);
put_be16(pb, codec->width);
put_be16(pb, codec->height);
+ put_be16(pb, codec->gop_size);
+ put_byte(pb, codec->qmin);
+ put_byte(pb, codec->qmax);
+ put_byte(pb, codec->max_qdiff);
+ put_be16(pb, (int) (codec->qcompress * 10000.0));
+ put_be16(pb, (int) (codec->qblur * 10000.0));
+ put_be32(pb, codec->bit_rate_tolerance);
break;
case CODEC_TYPE_AUDIO:
put_be32(pb, codec->sample_rate);
put_le16(pb, codec->channels);
+ put_le16(pb, codec->frame_size);
break;
+ default:
+ av_abort();
}
/* hack to have real time */
- fst->pts = gettime();
+ if (ffm_nopts)
+ fst->pts = 0;
+ else
+ fst->pts = gettime();
}
/* flush until end of block reached */
fail:
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
- fst = st->priv_data;
- if (fst)
- free(fst);
+ av_freep(&st->priv_data);
}
- free(ffm);
return -1;
}
static int ffm_write_packet(AVFormatContext *s, int stream_index,
- UINT8 *buf, int size)
+ UINT8 *buf, int size, int force_pts)
{
AVStream *st = s->streams[stream_index];
FFMStream *fst = st->priv_data;
INT64 pts;
UINT8 header[FRAME_HEADER_SIZE];
+ int duration;
+
+ if (st->codec.codec_type == CODEC_TYPE_AUDIO) {
+ duration = ((float)st->codec.frame_size / st->codec.sample_rate * 1000000.0);
+ } else {
+ duration = (1000000.0 * FRAME_RATE_BASE / (float)st->codec.frame_rate);
+ }
pts = fst->pts;
/* packet size & key_frame */
header[2] = (size >> 16) & 0xff;
header[3] = (size >> 8) & 0xff;
header[4] = size & 0xff;
+ header[5] = (duration >> 16) & 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);
- if (st->codec.codec_type == CODEC_TYPE_AUDIO) {
- fst->pts += (INT64)((float)st->codec.frame_size / st->codec.sample_rate * 1000000.0);
- } else {
- fst->pts += (INT64)(1000000.0 * FRAME_RATE_BASE / (float)st->codec.frame_rate);
- }
+ fst->pts += duration;
return 0;
}
put_flush_packet(pb);
+ if (!url_is_streamed(pb)) {
+ INT64 size;
+ /* update the write offset */
+ size = url_ftell(pb);
+ url_fseek(pb, 8, SEEK_SET);
+ put_be64(pb, size);
+ put_flush_packet(pb);
+ }
+
for(i=0;i<s->nb_streams;i++)
- free(s->streams[i]->priv_data);
- free(ffm);
+ av_freep(&s->streams[i]->priv_data);
return 0;
}
int len;
len = ffm->packet_end - ffm->packet_ptr;
- if (size <= len)
- return 1;
+ if (!ffm_nopts) {
+ /* XXX: I don't understand this test, so I disabled it for testing */
+ if (size <= len)
+ return 1;
+ }
pos = url_ftell(&s->pb);
if (pos == ffm->write_index) {
/* exactly at the end of stream */
}
/* first is true if we read the frame header */
-static int ffm_read_data(AVFormatContext *s,
- UINT8 *buf, int size, int first)
+static int ffm_read_data(AVFormatContext *s,
+ UINT8 *buf, int size, int first)
{
FFMContext *ffm = s->priv_data;
ByteIOContext *pb = &s->pb;
if (len == 0) {
if (url_ftell(pb) == ffm->file_size)
url_fseek(pb, ffm->packet_size, SEEK_SET);
+ retry_read:
get_be16(pb); /* PACKET_ID */
fill_size = get_be16(pb);
ffm->pts = get_be64(pb);
/* if first packet or resynchronization packet, we must
handle it specifically */
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);
+ 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)
+ av_abort();
ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
if (!first)
break;
static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
+ FFMContext *ffm = s->priv_data;
AVStream *st;
FFMStream *fst;
- FFMContext *ffm;
ByteIOContext *pb = &s->pb;
AVCodecContext *codec;
int i;
UINT32 tag;
- ffm = av_mallocz(sizeof(FFMContext) + FFM_PACKET_SIZE);
- if (!ffm)
- return -1;
-
- s->priv_data = ffm;
-
/* header */
tag = get_le32(pb);
if (tag != MKTAG('F', 'F', 'M', '1'))
if (!st)
goto fail;
s->streams[i] = st;
- fst = av_mallocz(sizeof(FFMStream) + ffm->packet_size);
+ fst = av_mallocz(sizeof(FFMStream));
if (!fst)
goto fail;
st->priv_data = fst;
st->codec.codec_id = get_be32(pb);
st->codec.codec_type = get_byte(pb); /* codec_type */
codec->bit_rate = get_be32(pb);
+ codec->flags = get_be32(pb);
/* specific info */
switch(codec->codec_type) {
case CODEC_TYPE_VIDEO:
codec->frame_rate = ((INT64)get_be32(pb) * FRAME_RATE_BASE) / 1000;
codec->width = get_be16(pb);
codec->height = get_be16(pb);
+ codec->gop_size = get_be16(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);
break;
case CODEC_TYPE_AUDIO:
codec->sample_rate = get_be32(pb);
codec->channels = get_le16(pb);
+ codec->frame_size = get_le16(pb);
break;
+ default:
+ av_abort();
}
}
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
if (st) {
- fst = st->priv_data;
- if (fst)
- free(fst);
- free(st);
+ av_freep(&st->priv_data);
+ av_free(st);
}
}
- if (ffm)
- free(ffm);
return -1;
}
{
int size;
FFMContext *ffm = s->priv_data;
+ int duration;
switch(ffm->read_state) {
case READ_HEADER:
- if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE))
+ if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
return -EAGAIN;
+ }
#if 0
- printf("pos=%08Lx spos=%Lx, write_index=%Lx size=%Lx\n",
+ printf("pos=%08Lx spos=%Lx, write_index=%Lx size=%Lx\n",
url_ftell(&s->pb), s->pb.pos, ffm->write_index, ffm->file_size);
#endif
- if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) != FRAME_HEADER_SIZE)
+ if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
+ FRAME_HEADER_SIZE)
return -EAGAIN;
-
#if 0
{
int i;
return -EAGAIN;
}
+ duration = (ffm->header[5] << 16) | (ffm->header[6] << 8) | ffm->header[7];
+
av_new_packet(pkt, size);
pkt->stream_index = ffm->header[0];
if (ffm->header[1] & FLAG_KEY_FRAME)
pkt->flags |= 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 -EAGAIN;
}
+ pkt->pts = ffm->pts;
+ pkt->duration = duration;
break;
}
return 0;
ByteIOContext *pb = &s->pb;
INT64 pts;
- ffm_seek1(s, pos);
+ ffm_seek1(s, pos);
url_fskip(pb, 4);
pts = get_be64(pb);
#ifdef DEBUG_SEEK
pts_min = get_pts(s, pos_min);
pts_max = get_pts(s, pos_max);
/* linear interpolation */
- pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
+ pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
(double)(pts_max - pts_min);
pos = (((INT64)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
if (pos <= pos_min)
lseek(fd, 8, SEEK_SET);
read(fd, buf, 8);
pos = 0;
- for(i=0;i<8;i++)
+ for(i=0;i<8;i++)
pos |= buf[i] << (56 - i * 8);
return pos;
}
UINT8 buf[8];
int i;
- for(i=0;i<8;i++)
+ for(i=0;i<8;i++)
buf[i] = (pos >> (56 - i * 8)) & 0xff;
lseek(fd, 8, SEEK_SET);
write(fd, buf, 8);
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
- free(st->priv_data);
+ av_freep(&st->priv_data);
}
- free(s->priv_data);
return 0;
}
-AVFormat ffm_format = {
+static int ffm_probe(AVProbeData *p)
+{
+ if (p->buf_size >= 4 &&
+ p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
+ p->buf[3] == '1')
+ return AVPROBE_SCORE_MAX + 1;
+ return 0;
+}
+
+AVInputFormat ffm_iformat = {
+ "ffm",
+ "ffm format",
+ sizeof(FFMContext),
+ ffm_probe,
+ ffm_read_header,
+ ffm_read_packet,
+ ffm_read_close,
+ ffm_seek,
+};
+
+AVOutputFormat ffm_oformat = {
"ffm",
"ffm format",
"",
"ffm",
+ sizeof(FFMContext),
/* not really used */
CODEC_ID_MP2,
CODEC_ID_MPEG1VIDEO,
ffm_write_header,
ffm_write_packet,
ffm_write_trailer,
- ffm_read_header,
- ffm_read_packet,
- ffm_read_close,
- ffm_seek,
};
+
+int ffm_init(void)
+{
+ av_register_input_format(&ffm_iformat);
+ av_register_output_format(&ffm_oformat);
+ return 0;
+}
projects / ffmpeg / blobdiff