diff options
Diffstat (limited to 'ffmpeg/tools/ismindex.c')
| -rw-r--r-- | ffmpeg/tools/ismindex.c | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/ffmpeg/tools/ismindex.c b/ffmpeg/tools/ismindex.c new file mode 100644 index 0000000..502a7dc --- /dev/null +++ b/ffmpeg/tools/ismindex.c @@ -0,0 +1,567 @@ +/* + * 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 "cmdutils.h" + +#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 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) + 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 Tracks *tracks, int start_index, + AVIOContext *in) +{ + char dirname[100], filename[500]; + 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), "QualityLevels(%d)", track->bitrate); + mkdir(dirname, 0777); + 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(sizeof(*track->offsets) * track->chunks); + 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) +{ + 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(tracks, start_index, f)) { + /* Empty */ + } + + if (split) + write_fragments(tracks, 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 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 = AVERROR(EINVAL); + + if (codec->codec_id == AV_CODEC_ID_VC1) + return get_private_data(track, 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: + 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) +{ + 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; + } + if (!tracks->duration) + tracks->duration = ctx->duration; + + for (i = 0; i < ctx->nb_streams; i++) { + struct Track **temp; + AVStream *st = ctx->streams[i]; + 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, '/')) != NULL) + track->name = ptr + 1; + + track->bitrate = st->codec->bit_rate; + track->track_id = st->id; + track->timescale = st->time_base.den; + track->duration = av_rescale_rnd(ctx->duration, track->timescale, + AV_TIME_BASE, AV_ROUND_UP); + 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; + } + + 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); + +fail: + if (ctx) + avformat_close_input(&ctx); + return err; +} + +static void output_server_manifest(struct Tracks *tracks, + 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 < 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\" systemBitrate=\"%d\">\n", + type, 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]; + 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 && + track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) + fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n", + type, i, track->name, tracks->tracks[j]->name); + } + fprintf(out, "\t\t<c n=\"%d\" d=\"%d\" />\n", + i, track->offsets[i].duration); + } +} + +static void output_client_manifest(struct Tracks *tracks, + 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", 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 and %s\n", + track->name, first_track->name); + } + 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; + 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], "-split")) { + split = 1; + } else if (argv[i][0] == '-') { + return usage(argv[0], 1); + } else { + if (handle_file(&tracks, argv[i], split)) + return 1; + } + } + if (!tracks.nb_tracks || (!basename && !split)) + return usage(argv[0], 1); + + if (!split) + output_server_manifest(&tracks, basename); + output_client_manifest(&tracks, basename, split); + + clean_tracks(&tracks); + + return 0; +} |