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ffmpeg/tools/ismindex.c
Michael Niedermayer d9a416fa1a Merge commit 'c487972ed0e1eaebdbe4a13cdd191e119be0b19c' 
* commit 'c487972ed0e1eaebdbe4a13cdd191e119be0b19c':
  ismindex: recover from completely empty streams

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2014-09-03 15:04:34 +02:00

629 lines
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/*
* Copyright (c) 2012 Martin Storsjo
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* To create a simple file for smooth streaming:
* ffmpeg <normal input/transcoding options> -movflags frag_keyframe foo.ismv
* ismindex -n foo foo.ismv
* This step creates foo.ism and foo.ismc that is required by IIS for
* serving it.
*
* By adding -path-prefix path/, the produced foo.ism will refer to the
* files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
* file can be set with the -ismc-prefix option similarly.
*
* To pre-split files for serving as static files by a web server without
* any extra server support, create the ismv file as above, and split it:
* ismindex -split foo.ismv
* This step creates a file Manifest and directories QualityLevel(...),
* that can be read directly by a smooth streaming player.
*
* The -output dir option can be used to request that output files
* (both .ism/.ismc, or Manifest/QualityLevels* when splitting)
* should be written to this directory instead of in the current directory.
* (The directory itself isn't created if it doesn't already exist.)
*/
#include <stdio.h>
#include <string.h>
#include "cmdutils.h"
#include "libavformat/avformat.h"
#include "libavformat/os_support.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
static int usage(const char *argv0, int ret)
{
fprintf(stderr, "%s [-split] [-n basename] [-path-prefix prefix] "
"[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
return ret;
}
struct MoofOffset {
int64_t time;
int64_t offset;
int64_t duration;
};
struct Track {
const char *name;
int64_t duration;
int bitrate;
int track_id;
int is_audio, is_video;
int width, height;
int chunks;
int sample_rate, channels;
uint8_t *codec_private;
int codec_private_size;
struct MoofOffset *offsets;
int timescale;
const char *fourcc;
int blocksize;
int tag;
};
struct Tracks {
int nb_tracks;
int64_t duration;
struct Track **tracks;
int video_track, audio_track;
int nb_video_tracks, nb_audio_tracks;
};
static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
{
int32_t size, tag;
size = avio_rb32(in);
tag = avio_rb32(in);
avio_wb32(out, size);
avio_wb32(out, tag);
if (tag != tag_name) {
char tag_str[4], tag_name_str[4];
AV_WB32(tag_str, tag);
AV_WB32(tag_name_str, tag_name);
fprintf(stderr, "wanted tag %.4s, got %.4s\n", tag_name_str, tag_str);
return -1;
}
size -= 8;
while (size > 0) {
char buf[1024];
int len = FFMIN(sizeof(buf), size);
int got;
if ((got = avio_read(in, buf, len)) != len) {
fprintf(stderr, "short read, wanted %d, got %d\n", len, got);
break;
}
avio_write(out, buf, len);
size -= len;
}
return 0;
}
static int write_fragment(const char *filename, AVIOContext *in)
{
AVIOContext *out = NULL;
int ret;
if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) {
char errbuf[100];
av_strerror(ret, errbuf, sizeof(errbuf));
fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf);
return ret;
}
ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
if (!ret)
ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
avio_flush(out);
avio_close(out);
return ret;
}
static int write_fragments(struct Tracks *tracks, int start_index,
AVIOContext *in, const char *output_prefix)
{
char dirname[2048], filename[2048];
int i, j;
for (i = start_index; i < tracks->nb_tracks; i++) {
struct Track *track = tracks->tracks[i];
const char *type = track->is_video ? "video" : "audio";
snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
if (mkdir(dirname, 0777) == -1)
return AVERROR(errno);
for (j = 0; j < track->chunks; j++) {
snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
dirname, type, track->offsets[j].time);
avio_seek(in, track->offsets[j].offset, SEEK_SET);
write_fragment(filename, in);
}
}
return 0;
}
static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
{
int ret = AVERROR_EOF, track_id;
int version, fieldlength, i, j;
int64_t pos = avio_tell(f);
uint32_t size = avio_rb32(f);
struct Track *track = NULL;
if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
goto fail;
version = avio_r8(f);
avio_rb24(f);
track_id = avio_rb32(f); /* track id */
for (i = start_index; i < tracks->nb_tracks && !track; i++)
if (tracks->tracks[i]->track_id == track_id)
track = tracks->tracks[i];
if (!track) {
/* Ok, continue parsing the next atom */
ret = 0;
goto fail;
}
fieldlength = avio_rb32(f);
track->chunks = avio_rb32(f);
track->offsets = av_mallocz_array(track->chunks, sizeof(*track->offsets));
if (!track->offsets) {
ret = AVERROR(ENOMEM);
goto fail;
}
for (i = 0; i < track->chunks; i++) {
if (version == 1) {
track->offsets[i].time = avio_rb64(f);
track->offsets[i].offset = avio_rb64(f);
} else {
track->offsets[i].time = avio_rb32(f);
track->offsets[i].offset = avio_rb32(f);
}
for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
avio_r8(f);
for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
avio_r8(f);
for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
avio_r8(f);
if (i > 0)
track->offsets[i - 1].duration = track->offsets[i].time -
track->offsets[i - 1].time;
}
if (track->chunks > 0)
track->offsets[track->chunks - 1].duration = track->duration -
track->offsets[track->chunks - 1].time;
ret = 0;
fail:
avio_seek(f, pos + size, SEEK_SET);
return ret;
}
static int read_mfra(struct Tracks *tracks, int start_index,
const char *file, int split, const char *output_prefix)
{
int err = 0;
const char* err_str = "";
AVIOContext *f = NULL;
int32_t mfra_size;
if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
goto fail;
avio_seek(f, avio_size(f) - 4, SEEK_SET);
mfra_size = avio_rb32(f);
avio_seek(f, -mfra_size, SEEK_CUR);
if (avio_rb32(f) != mfra_size) {
err = AVERROR_INVALIDDATA;
err_str = "mfra size mismatch";
goto fail;
}
if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
err = AVERROR_INVALIDDATA;
err_str = "mfra tag mismatch";
goto fail;
}
while (!read_tfra(tracks, start_index, f)) {
/* Empty */
}
if (split)
err = write_fragments(tracks, start_index, f, output_prefix);
fail:
if (f)
avio_close(f);
if (err)
fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str);
return err;
}
static int get_private_data(struct Track *track, AVCodecContext *codec)
{
track->codec_private_size = codec->extradata_size;
track->codec_private = av_mallocz(codec->extradata_size);
if (!track->codec_private)
return AVERROR(ENOMEM);
memcpy(track->codec_private, codec->extradata, codec->extradata_size);
return 0;
}
static int get_video_private_data(struct Track *track, AVCodecContext *codec)
{
AVIOContext *io = NULL;
uint16_t sps_size, pps_size;
int err;
if (codec->codec_id == AV_CODEC_ID_VC1)
return get_private_data(track, codec);
if ((err = avio_open_dyn_buf(&io)) < 0)
goto fail;
err = AVERROR(EINVAL);
if (codec->extradata_size < 11 || codec->extradata[0] != 1)
goto fail;
sps_size = AV_RB16(&codec->extradata[6]);
if (11 + sps_size > codec->extradata_size)
goto fail;
avio_wb32(io, 0x00000001);
avio_write(io, &codec->extradata[8], sps_size);
pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
if (11 + sps_size + pps_size > codec->extradata_size)
goto fail;
avio_wb32(io, 0x00000001);
avio_write(io, &codec->extradata[11 + sps_size], pps_size);
err = 0;
fail:
track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
return err;
}
static int handle_file(struct Tracks *tracks, const char *file, int split,
const char *output_prefix)
{
AVFormatContext *ctx = NULL;
int err = 0, i, orig_tracks = tracks->nb_tracks;
char errbuf[50], *ptr;
struct Track *track;
err = avformat_open_input(&ctx, file, NULL, NULL);
if (err < 0) {
av_strerror(err, errbuf, sizeof(errbuf));
fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
return 1;
}
err = avformat_find_stream_info(ctx, NULL);
if (err < 0) {
av_strerror(err, errbuf, sizeof(errbuf));
fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
goto fail;
}
if (ctx->nb_streams < 1) {
fprintf(stderr, "No streams found in %s\n", file);
goto fail;
}
for (i = 0; i < ctx->nb_streams; i++) {
struct Track **temp;
AVStream *st = ctx->streams[i];
if (st->codec->bit_rate == 0) {
fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n", i, file);
continue;
}
track = av_mallocz(sizeof(*track));
if (!track) {
err = AVERROR(ENOMEM);
goto fail;
}
temp = av_realloc(tracks->tracks,
sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
if (!temp) {
av_free(track);
err = AVERROR(ENOMEM);
goto fail;
}
tracks->tracks = temp;
tracks->tracks[tracks->nb_tracks] = track;
track->name = file;
if ((ptr = strrchr(file, '/')))
track->name = ptr + 1;
track->bitrate = st->codec->bit_rate;
track->track_id = st->id;
track->timescale = st->time_base.den;
track->duration = st->duration;
track->is_audio = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
track->is_video = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
if (!track->is_audio && !track->is_video) {
fprintf(stderr,
"Track %d in %s is neither video nor audio, skipping\n",
track->track_id, file);
av_freep(&tracks->tracks[tracks->nb_tracks]);
continue;
}
tracks->duration = FFMAX(tracks->duration,
av_rescale_rnd(track->duration, AV_TIME_BASE,
track->timescale, AV_ROUND_UP));
if (track->is_audio) {
if (tracks->audio_track < 0)
tracks->audio_track = tracks->nb_tracks;
tracks->nb_audio_tracks++;
track->channels = st->codec->channels;
track->sample_rate = st->codec->sample_rate;
if (st->codec->codec_id == AV_CODEC_ID_AAC) {
track->fourcc = "AACL";
track->tag = 255;
track->blocksize = 4;
} else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
track->fourcc = "WMAP";
track->tag = st->codec->codec_tag;
track->blocksize = st->codec->block_align;
}
get_private_data(track, st->codec);
}
if (track->is_video) {
if (tracks->video_track < 0)
tracks->video_track = tracks->nb_tracks;
tracks->nb_video_tracks++;
track->width = st->codec->width;
track->height = st->codec->height;
if (st->codec->codec_id == AV_CODEC_ID_H264)
track->fourcc = "H264";
else if (st->codec->codec_id == AV_CODEC_ID_VC1)
track->fourcc = "WVC1";
get_video_private_data(track, st->codec);
}
tracks->nb_tracks++;
}
avformat_close_input(&ctx);
err = read_mfra(tracks, orig_tracks, file, split, output_prefix);
fail:
if (ctx)
avformat_close_input(&ctx);
return err;
}
static void output_server_manifest(struct Tracks *tracks, const char *basename,
const char *output_prefix,
const char *path_prefix,
const char *ismc_prefix)
{
char filename[1000];
FILE *out;
int i;
snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
out = fopen(filename, "w");
if (!out) {
perror(filename);
return;
}
fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
fprintf(out, "\t<head>\n");
fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
"content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
fprintf(out, "\t</head>\n");
fprintf(out, "\t<body>\n");
fprintf(out, "\t\t<switch>\n");
for (i = 0; i < tracks->nb_tracks; i++) {
struct Track *track = tracks->tracks[i];
const char *type = track->is_video ? "video" : "audio";
fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
type, path_prefix, track->name, track->bitrate);
fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
"valueType=\"data\" />\n", track->track_id);
fprintf(out, "\t\t\t</%s>\n", type);
}
fprintf(out, "\t\t</switch>\n");
fprintf(out, "\t</body>\n");
fprintf(out, "</smil>\n");
fclose(out);
}
static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
const char *type)
{
int i, j;
struct Track *track = tracks->tracks[main];
int should_print_time_mismatch = 1;
for (i = 0; i < track->chunks; i++) {
for (j = main + 1; j < tracks->nb_tracks; j++) {
if (tracks->tracks[j]->is_audio == track->is_audio) {
if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) {
fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n",
type, i, track->name, main, tracks->tracks[j]->name, j);
should_print_time_mismatch = 1;
}
if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) {
if (should_print_time_mismatch)
fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n",
type, i, track->name, main, tracks->tracks[j]->name, j);
should_print_time_mismatch = 0;
}
}
}
fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" />\n",
i, track->offsets[i].duration);
}
}
static void output_client_manifest(struct Tracks *tracks, const char *basename,
const char *output_prefix, int split)
{
char filename[1000];
FILE *out;
int i, j;
if (split)
snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
else
snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
out = fopen(filename, "w");
if (!out) {
perror(filename);
return;
}
fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
"Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
if (tracks->video_track >= 0) {
struct Track *track = tracks->tracks[tracks->video_track];
struct Track *first_track = track;
int index = 0;
fprintf(out,
"\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
"Chunks=\"%d\" "
"Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
tracks->nb_video_tracks, track->chunks);
for (i = 0; i < tracks->nb_tracks; i++) {
track = tracks->tracks[i];
if (!track->is_video)
continue;
fprintf(out,
"\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
"FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
"CodecPrivateData=\"",
index, track->bitrate, track->fourcc, track->width, track->height);
for (j = 0; j < track->codec_private_size; j++)
fprintf(out, "%02X", track->codec_private[j]);
fprintf(out, "\" />\n");
index++;
if (track->chunks != first_track->chunks)
fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n",
track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks);
}
print_track_chunks(out, tracks, tracks->video_track, "video");
fprintf(out, "\t</StreamIndex>\n");
}
if (tracks->audio_track >= 0) {
struct Track *track = tracks->tracks[tracks->audio_track];
struct Track *first_track = track;
int index = 0;
fprintf(out,
"\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
"Chunks=\"%d\" "
"Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
tracks->nb_audio_tracks, track->chunks);
for (i = 0; i < tracks->nb_tracks; i++) {
track = tracks->tracks[i];
if (!track->is_audio)
continue;
fprintf(out,
"\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
"FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
"BitsPerSample=\"16\" PacketSize=\"%d\" "
"AudioTag=\"%d\" CodecPrivateData=\"",
index, track->bitrate, track->fourcc, track->sample_rate,
track->channels, track->blocksize, track->tag);
for (j = 0; j < track->codec_private_size; j++)
fprintf(out, "%02X", track->codec_private[j]);
fprintf(out, "\" />\n");
index++;
if (track->chunks != first_track->chunks)
fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
track->name, first_track->name);
}
print_track_chunks(out, tracks, tracks->audio_track, "audio");
fprintf(out, "\t</StreamIndex>\n");
}
fprintf(out, "</SmoothStreamingMedia>\n");
fclose(out);
}
static void clean_tracks(struct Tracks *tracks)
{
int i;
for (i = 0; i < tracks->nb_tracks; i++) {
av_freep(&tracks->tracks[i]->codec_private);
av_freep(&tracks->tracks[i]->offsets);
av_freep(&tracks->tracks[i]);
}
av_freep(&tracks->tracks);
tracks->nb_tracks = 0;
}
int main(int argc, char **argv)
{
const char *basename = NULL;
const char *path_prefix = "", *ismc_prefix = "";
const char *output_prefix = "";
char output_prefix_buf[2048];
int split = 0, i;
struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
av_register_all();
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "-n")) {
basename = argv[i + 1];
i++;
} else if (!strcmp(argv[i], "-path-prefix")) {
path_prefix = argv[i + 1];
i++;
} else if (!strcmp(argv[i], "-ismc-prefix")) {
ismc_prefix = argv[i + 1];
i++;
} else if (!strcmp(argv[i], "-output")) {
output_prefix = argv[i + 1];
i++;
if (output_prefix[strlen(output_prefix) - 1] != '/') {
snprintf(output_prefix_buf, sizeof(output_prefix_buf),
"%s/", output_prefix);
output_prefix = output_prefix_buf;
}
} else if (!strcmp(argv[i], "-split")) {
split = 1;
} else if (argv[i][0] == '-') {
return usage(argv[0], 1);
} else {
if (handle_file(&tracks, argv[i], split, output_prefix))
return 1;
}
}
if (!tracks.nb_tracks || (!basename && !split))
return usage(argv[0], 1);
if (!split)
output_server_manifest(&tracks, basename, output_prefix,
path_prefix, ismc_prefix);
output_client_manifest(&tracks, basename, output_prefix, split);
clean_tracks(&tracks);
return 0;
}
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