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lavf/tee: add special select option

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This commit is contained in:
Stefano Sabatini 2013-08-08 12:11:59 +02:00
parent e6876c7b7b
commit 5ae3563359
3 changed files with 64 additions and 14 deletions
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5
doc/muxers.texi
View File

@ -871,6 +871,11 @@ separated by @code{/}. If the stream specifier is not specified, the
bistream filters will be applied to all streams in the output.
Several bitstream filters can be specified, separated by ",".
@item select
Select the streams that should be mapped to the slave output,
specified by a stream specifier. If not specified, this defaults to
all the input streams.
@end table
Example: encode something and both archive it in a WebM file and stream it

71
libavformat/tee.c
View File

@ -30,6 +30,10 @@
typedef struct {
AVFormatContext *avf;
AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
/** map from input to output streams indexes,
* disabled output streams are set to -1 */
int *stream_map;
} TeeSlave;
typedef struct TeeContext {
@ -134,24 +138,54 @@ static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
AVDictionary *options = NULL;
AVDictionaryEntry *entry;
char *filename;
char *format = NULL;
char *format = NULL, *select = NULL;
AVFormatContext *avf2 = NULL;
AVStream *st, *st2;
int stream_count;
if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
return ret;
if ((entry = av_dict_get(options, "f", NULL, 0))) {
format = entry->value;
entry->value = NULL; /* prevent it from being freed */
av_dict_set(&options, "f", NULL, 0);
}
#define STEAL_OPTION(option, field) do { \
if ((entry = av_dict_get(options, option, NULL, 0))) { \
field = entry->value; \
entry->value = NULL; /* prevent it from being freed */ \
av_dict_set(&options, option, NULL, 0); \
} \
} while (0)
STEAL_OPTION("f", format);
STEAL_OPTION("select", select);
ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
if (ret < 0)
goto end;
tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
if (!tee_slave->stream_map) {
ret = AVERROR(ENOMEM);
goto end;
}
stream_count = 0;
for (i = 0; i < avf->nb_streams; i++) {
st = avf->streams[i];
if (select) {
ret = avformat_match_stream_specifier(avf, avf->streams[i], select);
if (ret < 0) {
av_log(avf, AV_LOG_ERROR,
"Invalid stream specifier '%s' for output '%s'\n",
select, slave);
goto end;
}
if (ret == 0) { /* no match */
tee_slave->stream_map[i] = -1;
continue;
}
}
tee_slave->stream_map[i] = stream_count++;
if (!(st2 = avformat_new_stream(avf2, NULL))) {
ret = AVERROR(ENOMEM);
goto end;
@ -266,6 +300,7 @@ static void close_slaves(AVFormatContext *avf)
bsf = bsf_next;
}
}
av_freep(&tee->slaves[i].stream_map);
avio_close(avf2->pb);
avf2->pb = NULL;
@ -329,6 +364,15 @@ static int tee_write_header(AVFormatContext *avf)
}
tee->nb_slaves = nb_slaves;
for (i = 0; i < avf->nb_streams; i++) {
int j, mapped = 0;
for (j = 0; j < tee->nb_slaves; j++)
mapped += tee->slaves[j].stream_map[i] >= 0;
if (!mapped)
av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
"to any slave.\n", i);
}
return 0;
fail:
@ -408,29 +452,30 @@ static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
AVPacket pkt2;
int ret_all = 0, ret;
unsigned i, s;
int s2;
AVRational tb, tb2;
for (i = 0; i < tee->nb_slaves; i++) {
avf2 = tee->slaves[i].avf;
s = pkt->stream_index;
if (s >= avf2->nb_streams) {
if (!ret_all)
ret_all = AVERROR(EINVAL);
s2 = tee->slaves[i].stream_map[s];
if (s2 < 0)
continue;
}
if ((ret = av_copy_packet(&pkt2, pkt)) < 0 ||
(ret = av_dup_packet(&pkt2))< 0)
if (!ret_all) {
ret = ret_all;
continue;
}
tb = avf ->streams[s]->time_base;
tb2 = avf2->streams[s]->time_base;
tb = avf ->streams[s ]->time_base;
tb2 = avf2->streams[s2]->time_base;
pkt2.pts = av_rescale_q(pkt->pts, tb, tb2);
pkt2.dts = av_rescale_q(pkt->dts, tb, tb2);
pkt2.duration = av_rescale_q(pkt->duration, tb, tb2);
pkt2.stream_index = s2;
filter_packet(avf2, &pkt2, avf2, tee->slaves[i].bsfs[s]);
filter_packet(avf2, &pkt2, avf2, tee->slaves[i].bsfs[s2]);
if ((ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)
if (!ret_all)
ret_all = ret;

2
libavformat/version.h
View File

@ -31,7 +31,7 @@
#define LIBAVFORMAT_VERSION_MAJOR 55
#define LIBAVFORMAT_VERSION_MINOR 14
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_MICRO 101
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \