mirror of https://git.ffmpeg.org/ffmpeg.git
ismindex: produce .ismf file
This is a non-standard file that maps the MSS segment names to offsets in the ISMV file. This can be used to build a custom MSS streaming server without splitting the ISMV into separate files. Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Mika Raento
Martin Storsjö
parent
d7913bf59c
commit
b21e989a3c
117
tools/ismindex.c
117
tools/ismindex.c
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@ -25,6 +25,9 @@
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* This step creates foo.ism and foo.ismc that is required by IIS for
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* serving it.
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*
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* With -ismf, it also creates foo.ismf, which maps fragment names to
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* start-end offsets in the ismv, for use in your own streaming server.
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*
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* By adding -path-prefix path/, the produced foo.ism will refer to the
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* files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
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* file can be set with the -ismc-prefix option similarly.
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@ -51,7 +54,7 @@
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static int usage(const char *argv0, int ret)
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{
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fprintf(stderr, "%s [-split] [-n basename] [-path-prefix prefix] "
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fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] "
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"[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
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return ret;
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}
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@ -88,6 +91,18 @@ struct Tracks {
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int nb_video_tracks, nb_audio_tracks;
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};
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static int expect_tag(int32_t got_tag, int32_t expected_tag) {
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if (got_tag != expected_tag) {
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char got_tag_str[4], expected_tag_str[4];
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AV_WB32(got_tag_str, got_tag);
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AV_WB32(expected_tag_str, expected_tag);
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fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str,
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got_tag_str);
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return -1;
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}
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return 0;
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}
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static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
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{
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int32_t size, tag;
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@ -96,13 +111,8 @@ static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
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tag = avio_rb32(in);
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avio_wb32(out, size);
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avio_wb32(out, tag);
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if (tag != tag_name) {
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char tag_str[4], tag_name_str[4];
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AV_WB32(tag_str, tag);
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AV_WB32(tag_name_str, tag_name);
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fprintf(stderr, "wanted tag %.4s, got %.4s\n", tag_name_str, tag_str);
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if (expect_tag(tag, tag_name) != 0)
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return -1;
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}
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size -= 8;
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while (size > 0) {
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char buf[1024];
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@ -118,6 +128,19 @@ static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
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return 0;
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}
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static int skip_tag(AVIOContext *in, int32_t tag_name)
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{
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int64_t pos = avio_tell(in);
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int32_t size, tag;
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size = avio_rb32(in);
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tag = avio_rb32(in);
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if (expect_tag(tag, tag_name) != 0)
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return -1;
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avio_seek(in, pos + size, SEEK_SET);
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return 0;
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}
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static int write_fragment(const char *filename, AVIOContext *in)
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{
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AVIOContext *out = NULL;
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@ -139,25 +162,66 @@ static int write_fragment(const char *filename, AVIOContext *in)
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return ret;
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}
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static int write_fragments(struct Tracks *tracks, int start_index,
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AVIOContext *in, const char *output_prefix)
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static int skip_fragment(AVIOContext *in)
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{
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char dirname[2048], filename[2048];
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int i, j;
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int ret;
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ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f'));
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if (!ret)
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ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't'));
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return ret;
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}
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static int write_fragments(struct Tracks *tracks, int start_index,
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AVIOContext *in, const char *basename,
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int split, int ismf, const char* output_prefix)
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{
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char dirname[2048], filename[2048], idxname[2048];
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int i, j, ret = 0, fragment_ret;
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FILE* out = NULL;
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if (ismf) {
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snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename);
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out = fopen(idxname, "w");
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if (!out) {
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ret = AVERROR(errno);
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perror(idxname);
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goto fail;
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}
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}
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for (i = start_index; i < tracks->nb_tracks; i++) {
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struct Track *track = tracks->tracks[i];
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const char *type = track->is_video ? "video" : "audio";
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snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
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mkdir(dirname, 0777);
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if (split) {
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if (mkdir(dirname, 0777) == -1 && errno != EEXIST) {
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ret = AVERROR(errno);
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perror(dirname);
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goto fail;
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}
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}
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for (j = 0; j < track->chunks; j++) {
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snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
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dirname, type, track->offsets[j].time);
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avio_seek(in, track->offsets[j].offset, SEEK_SET);
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write_fragment(filename, in);
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if (ismf)
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fprintf(out, "%s %"PRId64, filename, avio_tell(in));
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if (split)
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fragment_ret = write_fragment(filename, in);
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else
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fragment_ret = skip_fragment(in);
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if (ismf)
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fprintf(out, " %"PRId64"\n", avio_tell(in));
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if (fragment_ret != 0) {
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fprintf(stderr, "failed fragment %d in track %d (%s)\n", j,
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track->track_id, track->name);
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ret = fragment_ret;
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}
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}
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}
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return 0;
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fail:
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if (out)
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fclose(out);
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return ret;
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}
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static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
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@ -217,7 +281,8 @@ fail:
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}
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static int read_mfra(struct Tracks *tracks, int start_index,
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const char *file, int split, const char *output_prefix)
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const char *file, int split, int ismf,
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const char *basename, const char* output_prefix)
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{
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int err = 0;
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const char* err_str = "";
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@ -243,8 +308,10 @@ static int read_mfra(struct Tracks *tracks, int start_index,
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/* Empty */
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}
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if (split)
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write_fragments(tracks, start_index, f, output_prefix);
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if (split || ismf)
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err = write_fragments(tracks, start_index, f, basename, split, ismf,
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output_prefix);
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err_str = "error in write_fragments";
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fail:
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if (f)
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@ -296,7 +363,8 @@ fail:
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}
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static int handle_file(struct Tracks *tracks, const char *file, int split,
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const char *output_prefix)
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int ismf, const char *basename,
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const char* output_prefix)
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{
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AVFormatContext *ctx = NULL;
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int err = 0, i, orig_tracks = tracks->nb_tracks;
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@ -327,7 +395,8 @@ static int handle_file(struct Tracks *tracks, const char *file, int split,
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AVStream *st = ctx->streams[i];
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if (st->codec->bit_rate == 0) {
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fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n", i, file);
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fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
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st->id, file);
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continue;
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}
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@ -404,7 +473,8 @@ static int handle_file(struct Tracks *tracks, const char *file, int split,
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avformat_close_input(&ctx);
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err = read_mfra(tracks, orig_tracks, file, split, output_prefix);
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err = read_mfra(tracks, orig_tracks, file, split, ismf, basename,
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output_prefix);
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fail:
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if (ctx)
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@ -579,7 +649,7 @@ int main(int argc, char **argv)
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const char *path_prefix = "", *ismc_prefix = "";
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const char *output_prefix = "";
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char output_prefix_buf[2048];
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int split = 0, i;
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int split = 0, ismf = 0, i;
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struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
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av_register_all();
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@ -604,10 +674,13 @@ int main(int argc, char **argv)
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}
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} else if (!strcmp(argv[i], "-split")) {
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split = 1;
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} else if (!strcmp(argv[i], "-ismf")) {
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ismf = 1;
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} else if (argv[i][0] == '-') {
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return usage(argv[0], 1);
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} else {
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if (handle_file(&tracks, argv[i], split, output_prefix))
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if (handle_file(&tracks, argv[i], split, ismf,
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basename, output_prefix))
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return 1;
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}
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}
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