AVFormatContext *
fa_libav_open_format(AVIOContext *avio, const char *url,
char *errbuf, size_t errlen)
{
AVInputFormat *fmt = NULL;
AVFormatContext *fctx;
int err;
avio_seek(avio, 0, SEEK_SET);
if((err = av_probe_input_buffer(avio, &fmt, url, NULL, 0, 0)) != 0)
return fa_libav_open_error(errbuf, errlen,
"Unable to probe file", err);
if(fmt == NULL) {
snprintf(errbuf, errlen, "Unknown file format");
return NULL;
}
if((err = av_open_input_stream(&fctx, avio, url, fmt, NULL)) != 0)
return fa_libav_open_error(errbuf, errlen,
"Unable to open file as input format", err);
if(av_find_stream_info(fctx) < 0) {
av_close_input_stream(fctx);
return fa_libav_open_error(errbuf, errlen,
"Unable to handle file contents", err);
}
return fctx;
}
AVFormatContext *
fa_libav_open_format(AVIOContext *avio, const char *url,
char *errbuf, size_t errlen, const char *mimetype)
{
AVInputFormat *fmt = NULL;
AVFormatContext *fctx;
int err;
avio_seek(avio, 0, SEEK_SET);
if(mimetype != NULL) {
int i;
for(i = 0; i < sizeof(mimetype2fmt) / sizeof(mimetype2fmt[0]); i++) {
if(!strcmp(mimetype, mimetype2fmt[i].mimetype)) {
fmt = av_find_input_format(mimetype2fmt[i].fmt);
break;
}
}
if(fmt == NULL)
TRACE(TRACE_DEBUG, "probe", "Don't know mimetype %s, probing instead",
mimetype);
}
if(fmt == NULL) {
if((err = av_probe_input_buffer(avio, &fmt, url, NULL, 0, 0)) != 0)
return fa_libav_open_error(errbuf, errlen,
"Unable to probe file", err);
if(fmt == NULL) {
snprintf(errbuf, errlen, "Unknown file format");
return NULL;
}
}
fctx = avformat_alloc_context();
fctx->pb = avio;
if((err = avformat_open_input(&fctx, url, fmt, NULL)) != 0) {
if(mimetype != NULL)
return fa_libav_open_format(avio, url, errbuf, errlen, NULL);
return fa_libav_open_error(errbuf, errlen,
"Unable to open file as input format", err);
}
if(av_find_stream_info(fctx) < 0) {
av_close_input_stream(fctx);
if(mimetype != NULL)
return fa_libav_open_format(avio, url, errbuf, errlen, NULL);
return fa_libav_open_error(errbuf, errlen,
"Unable to handle file contents", err);
}
return fctx;
}
AVFormatContext *
fa_libav_open_format(AVIOContext *avio, const char *url,
char *errbuf, size_t errlen, const char *mimetype,
int probe_size, int max_analyze_duration,
int fps_probe_frames)
{
AVInputFormat *fmt = NULL;
AVFormatContext *fctx;
int err;
avio_seek(avio, 0, SEEK_SET);
if(mimetype != NULL) {
int i;
for(i = 0; i < sizeof(mimetype2fmt) / sizeof(mimetype2fmt[0]); i++) {
if(!strcasecmp(mimetype, mimetype2fmt[i].mimetype)) {
fmt = av_find_input_format(mimetype2fmt[i].fmt);
break;
}
}
if(fmt == NULL)
TRACE(TRACE_DEBUG, "probe", "%s: Don't know mimetype %s, probing instead",
url, mimetype);
}
if(fmt == NULL) {
if((err = av_probe_input_buffer(avio, &fmt, url, NULL, 0, probe_size)) != 0)
return fa_libav_open_error(errbuf, errlen,
"Unable to probe file", err);
if(fmt == NULL) {
snprintf(errbuf, errlen, "Unknown file format");
return NULL;
}
TRACE(TRACE_DEBUG, "probe", "%s: Probed as %s", url, fmt->name);
}
fctx = avformat_alloc_context();
fctx->pb = avio;
if(max_analyze_duration != -1)
fctx->max_analyze_duration = max_analyze_duration;
if((err = avformat_open_input(&fctx, url, fmt, NULL)) != 0) {
if(mimetype != NULL) {
TRACE(TRACE_DEBUG, "libav",
"Unable to open using mimetype %s, retrying with probe",
mimetype);
return fa_libav_open_format(avio, url, errbuf, errlen, NULL, probe_size,
max_analyze_duration, fps_probe_frames);
}
return fa_libav_open_error(errbuf, errlen,
"Unable to open file as input format", err);
}
if(fps_probe_frames != -1)
fctx->fps_probe_size = fps_probe_frames;
if(avformat_find_stream_info(fctx, NULL) < 0) {
avformat_close_input(&fctx);
if(mimetype != NULL) {
TRACE(TRACE_DEBUG, "libav",
"Unable to find stream info using mimetype %s, retrying with probe",
mimetype);
return fa_libav_open_format(avio, url, errbuf, errlen, NULL, probe_size,
max_analyze_duration, fps_probe_frames);
}
return fa_libav_open_error(errbuf, errlen,
"Unable to handle file contents", err);
}
return fctx;
}
