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make AVFMT_NOHEADER flag dynamic - added av_open_input_stream()

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Originally committed as revision 2447 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard
2003-10-29 14:20:56 +00:00
parent b45a7a18d3
commit da24c5e330
3 changed files with 112 additions and 79 deletions
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165
libavformat/utils.c
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@ -274,6 +274,56 @@ AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened)
/************************************************************/
/* input media file */
/**
* open a media file from an IO stream. 'fmt' must be specified.
*/
int av_open_input_stream(AVFormatContext **ic_ptr,
ByteIOContext *pb, const char *filename,
AVInputFormat *fmt, AVFormatParameters *ap)
{
int err;
AVFormatContext *ic;
ic = av_mallocz(sizeof(AVFormatContext));
if (!ic) {
err = AVERROR_NOMEM;
goto fail;
}
ic->iformat = fmt;
if (pb)
ic->pb = *pb;
ic->duration = AV_NOPTS_VALUE;
ic->start_time = AV_NOPTS_VALUE;
pstrcpy(ic->filename, sizeof(ic->filename), filename);
/* allocate private data */
if (fmt->priv_data_size > 0) {
ic->priv_data = av_mallocz(fmt->priv_data_size);
if (!ic->priv_data) {
err = AVERROR_NOMEM;
goto fail;
}
} else {
ic->priv_data = NULL;
}
/* default pts settings is MPEG like */
av_set_pts_info(ic, 33, 1, 90000);
err = ic->iformat->read_header(ic, ap);
if (err < 0)
goto fail;
*ic_ptr = ic;
return 0;
fail:
if (ic) {
av_freep(&ic->priv_data);
}
av_free(ic);
*ic_ptr = NULL;
return err;
}
#define PROBE_BUF_SIZE 2048
/**
@ -292,20 +342,15 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
int buf_size,
AVFormatParameters *ap)
{
AVFormatContext *ic = NULL;
int err, must_open_file;
unsigned char buf[PROBE_BUF_SIZE];
int err, must_open_file, file_opened;
uint8_t buf[PROBE_BUF_SIZE];
AVProbeData probe_data, *pd = &probe_data;
ic = av_mallocz(sizeof(AVFormatContext));
if (!ic) {
err = AVERROR_NOMEM;
goto fail;
}
ic->duration = AV_NOPTS_VALUE;
ic->start_time = AV_NOPTS_VALUE;
pstrcpy(ic->filename, sizeof(ic->filename), filename);
pd->filename = ic->filename;
ByteIOContext pb1, *pb = &pb1;
file_opened = 0;
pd->filename = "";
if (filename)
pd->filename = filename;
pd->buf = buf;
pd->buf_size = 0;
@ -317,27 +362,24 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
/* do not open file if the format does not need it. XXX: specific
hack needed to handle RTSP/TCP */
must_open_file = 1;
if ((fmt && (fmt->flags & AVFMT_NOFILE))
#ifdef CONFIG_NETWORK
|| (fmt == &rtp_demux && !strcmp(filename, "null"))
#endif
) {
if (fmt && (fmt->flags & AVFMT_NOFILE)) {
must_open_file = 0;
}
if (!fmt || must_open_file) {
/* if no file needed do not try to open one */
if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0) {
if (url_fopen(pb, filename, URL_RDONLY) < 0) {
err = AVERROR_IO;
goto fail;
}
file_opened = 1;
if (buf_size > 0) {
url_setbufsize(&ic->pb, buf_size);
url_setbufsize(pb, buf_size);
}
if (!fmt) {
/* read probe data */
pd->buf_size = get_buffer(&ic->pb, buf, PROBE_BUF_SIZE);
url_fseek(&ic->pb, 0, SEEK_SET);
pd->buf_size = get_buffer(pb, buf, PROBE_BUF_SIZE);
url_fseek(pb, 0, SEEK_SET);
}
}
@ -349,65 +391,46 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
/* if still no format found, error */
if (!fmt) {
err = AVERROR_NOFMT;
goto fail1;
goto fail;
}
/* XXX: suppress this hack for redirectors */
#ifdef CONFIG_NETWORK
if (fmt == &redir_demux) {
err = redir_open(ic_ptr, &ic->pb);
url_fclose(&ic->pb);
av_free(ic);
err = redir_open(ic_ptr, pb);
url_fclose(pb);
return err;
}
#endif
ic->iformat = fmt;
/* check filename in case of an image number is expected */
if (ic->iformat->flags & AVFMT_NEEDNUMBER) {
if (filename_number_test(ic->filename) < 0) {
if (fmt->flags & AVFMT_NEEDNUMBER) {
if (filename_number_test(filename) < 0) {
err = AVERROR_NUMEXPECTED;
goto fail1;
goto fail;
}
}
/* allocate private data */
if (fmt->priv_data_size > 0) {
ic->priv_data = av_mallocz(fmt->priv_data_size);
if (!ic->priv_data) {
err = AVERROR_NOMEM;
goto fail1;
}
} else
ic->priv_data = NULL;
/* default pts settings is MPEG like */
av_set_pts_info(ic, 33, 1, 90000);
err = ic->iformat->read_header(ic, ap);
if (err < 0)
goto fail1;
*ic_ptr = ic;
err = av_open_input_stream(ic_ptr, pb, filename, fmt, ap);
if (err)
goto fail;
return 0;
fail1:
if (!fmt || must_open_file) {
url_fclose(&ic->pb);
}
fail:
if (ic) {
av_freep(&ic->priv_data);
}
av_free(ic);
if (file_opened)
url_fclose(pb);
*ic_ptr = NULL;
return err;
}
/*******************************************************/
/**
* Read a packet from a media file
* Read a packet from a media file. Use it only for low level file
* reading. It is almost always better to use av_read_frame().
*
* @param s media file handle
* @param pkt is filled
* @return 0 if OK. AVERROR_xxx if error.
* @return 0 if OK. AVERROR_xxx if error.
*/
int av_read_packet(AVFormatContext *s, AVPacket *pkt)
{
@ -425,6 +448,7 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt)
}
}
/*******************************************************/
/* return TRUE if the stream has accurate timings for at least one component */
static int av_has_timings(AVFormatContext *ic)
@ -796,7 +820,7 @@ int av_find_stream_info(AVFormatContext *ic)
/* NOTE: if the format has no header, then we need to read
some packets to get most of the streams, so we cannot
stop here */
if (!(ic->iformat->flags & AVFMT_NOHEADER) ||
if (!(ic->ctx_flags & AVFMTCTX_NOHEADER) ||
read_size >= min_read_size) {
/* if we found the info for all the codecs, we can stop */
ret = count;
@ -821,12 +845,12 @@ int av_find_stream_info(AVFormatContext *ic)
ppktl = &pktl->next;
/* NOTE: a new stream can be added there if no header in file
(AVFMT_NOHEADER) */
(AVFMTCTX_NOHEADER) */
pkt = &pktl->pkt;
if (ic->iformat->read_packet(ic, pkt) < 0) {
/* EOF or error */
ret = -1; /* we could not have all the codec parameters before EOF */
if ((ic->iformat->flags & AVFMT_NOHEADER) &&
if ((ic->ctx_flags & AVFMTCTX_NOHEADER) &&
i == ic->nb_streams)
ret = 0;
break;
@ -950,11 +974,14 @@ int av_find_stream_info(AVFormatContext *ic)
void av_close_input_file(AVFormatContext *s)
{
int i, must_open_file;
AVStream *st;
if (s->iformat->read_close)
s->iformat->read_close(s);
for(i=0;i<s->nb_streams;i++) {
av_free(s->streams[i]);
/* free all data in a stream component */
st = s->streams[i];
av_free(st);
}
if (s->packet_buffer) {
AVPacketList *p, *p1;
@ -968,11 +995,7 @@ void av_close_input_file(AVFormatContext *s)
s->packet_buffer = NULL;
}
must_open_file = 1;
if ((s->iformat->flags & AVFMT_NOFILE)
#ifdef CONFIG_NETWORK
|| (s->iformat == &rtp_demux && !strcmp(s->filename, "null"))
#endif
) {
if (s->iformat->flags & AVFMT_NOFILE) {
must_open_file = 0;
}
if (must_open_file) {
@ -984,12 +1007,12 @@ void av_close_input_file(AVFormatContext *s)
/**
* Add a new stream to a media file. Can only be called in the
* read_header function. If the flag AVFMT_NOHEADER is in the format
* description, then new streams can be added in read_packet too.
* read_header function. If the flag AVFMTCTX_NOHEADER is in the
* format context, then new streams can be added in read_packet too.
*
*
* @param s media file handle
* @param id file format dependent stream id
* @param id file format dependent stream id
*/
AVStream *av_new_stream(AVFormatContext *s, int id)
{