/*
* Copyright (c) 2012 Martin Storsjo
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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.
*
* 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.
*/
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#ifdef _WIN32
#include <direct.h>
#define mkdir(a, b) _mkdir(a)
#endif
#include "libavformat/avformat.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
static int usage(const char *argv0, int ret)
{
fprintf(stderr, "%s [-split] [-n basename] file1 [file2] ...\n", argv0);
return ret;
}
struct MoofOffset {
int64_t time;
int64_t offset;
int duration;
};
struct VideoFile {
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 VideoFiles {
int nb_files;
int64_t duration;
struct VideoFile **files;
int video_file, audio_file;
int nb_video_files, nb_audio_files;
};
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)
return -1;
size -= 8;
while (size > 0) {
char buf[1024];
int len = FFMIN(sizeof(buf), size);
if (avio_read(in, buf, len) != len)
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)
return ret;
copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
avio_flush(out);
avio_close(out);
return ret;
}
static int write_fragments(struct VideoFiles *files, int start_index,
AVIOContext *in)
{
char dirname[100], filename[500];
int i, j;
for (i = start_index; i < files->nb_files; i++) {
struct VideoFile *vf = files->files[i];
const char *type = vf->is_video ? "video" : "audio";
snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", vf->bitrate);
mkdir(dirname, 0777);
for (j = 0; j < vf->chunks; j++) {
snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
dirname, type, vf->offsets[j].time);
avio_seek(in, vf->offsets[j].offset, SEEK_SET);
write_fragment(filename, in);
}
}
return 0;
}
static int read_tfra(struct VideoFiles *files, 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 VideoFile *vf = 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 < files->nb_files && !vf; i++)
if (files->files[i]->track_id == track_id)
vf = files->files[i];
if (!vf) {
/* Ok, continue parsing the next atom */
ret = 0;
goto fail;
}
fieldlength = avio_rb32(f);
vf->chunks = avio_rb32(f);
vf->offsets = av_mallocz(sizeof(*vf->offsets) * vf->chunks);
if (!vf->offsets) {
ret = AVERROR(ENOMEM);
goto fail;
}
for (i = 0; i < vf->chunks; i++) {
if (version == 1) {
vf->offsets[i].time = avio_rb64(f);
vf->offsets[i].offset = avio_rb64(f);
} else {
vf->offsets[i].time = avio_rb32(f);
vf->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)
vf->offsets[i - 1].duration = vf->offsets[i].time -
vf->offsets[i - 1].time;
}
if (vf->chunks > 0)
vf->offsets[vf->chunks - 1].duration = vf->duration -
vf->offsets[vf->chunks - 1].time;
ret = 0;
fail:
avio_seek(f, pos + size, SEEK_SET);
return ret;
}
static int read_mfra(struct VideoFiles *files, int start_index,
const char *file, int split)
{
int err = 0;
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;
goto fail;
}
if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
err = AVERROR_INVALIDDATA;
goto fail;
}
while (!read_tfra(files, start_index, f)) {
/* Empty */
}
if (split)
write_fragments(files, start_index, f);
fail:
if (f)
avio_close(f);
if (err)
fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
return err;
}
static int get_private_data(struct VideoFile *vf, AVCodecContext *codec)
{
vf->codec_private_size = codec->extradata_size;
vf->codec_private = av_mallocz(codec->extradata_size);
if (!vf->codec_private)
return AVERROR(ENOMEM);
memcpy(vf->codec_private, codec->extradata, codec->extradata_size);
return 0;
}
static int get_video_private_data(struct VideoFile *vf, AVCodecContext *codec)
{
AVIOContext *io = NULL;
uint16_t sps_size, pps_size;
int err = AVERROR(EINVAL);
if (codec->codec_id == AV_CODEC_ID_VC1)
return get_private_data(vf, codec);
if (avio_open_dyn_buf(&io) < 0) {
err = AVERROR(ENOMEM);
goto fail;
}
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:
vf->codec_private_size = avio_close_dyn_buf(io, &vf->codec_private);
return err;
}
static int handle_file(struct VideoFiles *files, const char *file, int split)
{
AVFormatContext *ctx = NULL;
int err = 0, i, orig_files = files->nb_files;
char errbuf[50], *ptr;
struct VideoFile *vf;
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;
}
if (!files->duration)
files->duration = ctx->duration;
for (i = 0; i < ctx->nb_streams; i++) {
AVStream *st = ctx->streams[i];
vf = av_mallocz(sizeof(*vf));
files->files = av_realloc(files->files,
sizeof(*files->files) * (files->nb_files + 1));
files->files[files->nb_files] = vf;
vf->name = file;
if ((ptr = strrchr(file, '/')) != NULL)
vf->name = ptr + 1;
vf->bitrate = st->codec->bit_rate;
vf->track_id = st->id;
vf->timescale = st->time_base.den;
vf->duration = av_rescale_rnd(ctx->duration, vf->timescale,
AV_TIME_BASE, AV_ROUND_UP);
vf->is_audio = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
vf->is_video = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
if (!vf->is_audio && !vf->is_video) {
fprintf(stderr,
"Track %d in %s is neither video nor audio, skipping\n",
vf->track_id, file);
av_freep(&files->files[files->nb_files]);
continue;
}
if (vf->is_audio) {
if (files->audio_file < 0)
files->audio_file = files->nb_files;
files->nb_audio_files++;
vf->channels = st->codec->channels;
vf->sample_rate = st->codec->sample_rate;
if (st->codec->codec_id == AV_CODEC_ID_AAC) {
vf->fourcc = "AACL";
vf->tag = 255;
vf->blocksize = 4;
} else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
vf->fourcc = "WMAP";
vf->tag = st->codec->codec_tag;
vf->blocksize = st->codec->block_align;
}
get_private_data(vf, st->codec);
}
if (vf->is_video) {
if (files->video_file < 0)
files->video_file = files->nb_files;
files->nb_video_files++;
vf->width = st->codec->width;
vf->height = st->codec->height;
if (st->codec->codec_id == AV_CODEC_ID_H264)
vf->fourcc = "H264";
else if (st->codec->codec_id == AV_CODEC_ID_VC1)
vf->fourcc = "WVC1";
get_video_private_data(vf, st->codec);
}
files->nb_files++;
}
avformat_close_input(&ctx);
err = read_mfra(files, orig_files, file, split);
fail:
if (ctx)
avformat_close_input(&ctx);
return err;
}
static void output_server_manifest(struct VideoFiles *files,
const char *basename)
{
char filename[1000];
FILE *out;
int i;
snprintf(filename, sizeof(filename), "%s.ism", 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.ismc\" />\n", basename);
fprintf(out, "\t</head>\n");
fprintf(out, "\t<body>\n");
fprintf(out, "\t\t<switch>\n");
for (i = 0; i < files->nb_files; i++) {
struct VideoFile *vf = files->files[i];
const char *type = vf->is_video ? "video" : "audio";
fprintf(out, "\t\t\t<%s src=\"%s\" systemBitrate=\"%d\">\n",
type, vf->name, vf->bitrate);
fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
"valueType=\"data\" />\n", vf->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 output_client_manifest(struct VideoFiles *files,
const char *basename, int split)
{
char filename[1000];
FILE *out;
int i, j;
if (split)
snprintf(filename, sizeof(filename), "Manifest");
else
snprintf(filename, sizeof(filename), "%s.ismc", 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", files->duration * 10);
if (files->video_file >= 0) {
struct VideoFile *vf = files->files[files->video_file];
struct VideoFile *first_vf = vf;
int index = 0;
fprintf(out,
"\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
"Chunks=\"%d\" "
"Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
files->nb_video_files, vf->chunks);
for (i = 0; i < files->nb_files; i++) {
vf = files->files[i];
if (!vf->is_video)
continue;
fprintf(out,
"\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
"FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
"CodecPrivateData=\"",
index, vf->bitrate, vf->fourcc, vf->width, vf->height);
for (j = 0; j < vf->codec_private_size; j++)
fprintf(out, "%02X", vf->codec_private[j]);
fprintf(out, "\" />\n");
index++;
if (vf->chunks != first_vf->chunks)
fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
vf->name, first_vf->name);
}
vf = first_vf;
for (i = 0; i < vf->chunks; i++) {
for (j = files->video_file + 1; j < files->nb_files; j++) {
if (files->files[j]->is_video &&
vf->offsets[i].duration != files->files[j]->offsets[i].duration)
fprintf(stderr, "Mismatched duration of video chunk %d in %s and %s\n",
i, vf->name, files->files[j]->name);
}
fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n", i,
vf->offsets[i].duration);
}
fprintf(out, "\t</StreamIndex>\n");
}
if (files->audio_file >= 0) {
struct VideoFile *vf = files->files[files->audio_file];
struct VideoFile *first_vf = vf;
int index = 0;
fprintf(out,
"\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
"Chunks=\"%d\" "
"Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
files->nb_audio_files, vf->chunks);
for (i = 0; i < files->nb_files; i++) {
vf = files->files[i];
if (!vf->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, vf->bitrate, vf->fourcc, vf->sample_rate,
vf->channels, vf->blocksize, vf->tag);
for (j = 0; j < vf->codec_private_size; j++)
fprintf(out, "%02X", vf->codec_private[j]);
fprintf(out, "\" />\n");
index++;
if (vf->chunks != first_vf->chunks)
fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
vf->name, first_vf->name);
}
vf = first_vf;
for (i = 0; i < vf->chunks; i++) {
for (j = files->audio_file + 1; j < files->nb_files; j++) {
if (files->files[j]->is_audio &&
vf->offsets[i].duration != files->files[j]->offsets[i].duration)
fprintf(stderr, "Mismatched duration of audio chunk %d in %s and %s\n",
i, vf->name, files->files[j]->name);
}
fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n",
i, vf->offsets[i].duration);
}
fprintf(out, "\t</StreamIndex>\n");
}
fprintf(out, "</SmoothStreamingMedia>\n");
fclose(out);
}
static void clean_files(struct VideoFiles *files)
{
int i;
for (i = 0; i < files->nb_files; i++) {
av_freep(&files->files[i]->codec_private);
av_freep(&files->files[i]->offsets);
av_freep(&files->files[i]);
}
av_freep(&files->files);
files->nb_files = 0;
}
int main(int argc, char **argv)
{
const char *basename = NULL;
int split = 0, i;
struct VideoFiles vf = { 0, .video_file = -1, .audio_file = -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], "-split")) {
split = 1;
} else if (argv[i][0] == '-') {
return usage(argv[0], 1);
} else {
if (handle_file(&vf, argv[i], split))
return 1;
}
}
if (!vf.nb_files || (!basename && !split))
return usage(argv[0], 1);
if (!split)
output_server_manifest(&vf, basename);
output_client_manifest(&vf, basename, split);
clean_files(&vf);
return 0;
}