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-rw-r--r--libavformat/smoothstreamingenc.c621
1 files changed, 621 insertions, 0 deletions
diff --git a/libavformat/smoothstreamingenc.c b/libavformat/smoothstreamingenc.c
new file mode 100644
index 0000000000..5ddba7eb06
--- /dev/null
+++ b/libavformat/smoothstreamingenc.c
@@ -0,0 +1,621 @@
+/*
+ * Live smooth streaming fragmenter
+ * 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
+ */
+
+#include "config.h"
+#include <float.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "avformat.h"
+#include "internal.h"
+#include "os_support.h"
+#include "avc.h"
+#include "url.h"
+
+#include "libavutil/opt.h"
+#include "libavutil/avstring.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/intreadwrite.h"
+
+typedef struct {
+ char file[1024];
+ char infofile[1024];
+ int64_t start_time, duration;
+ int n;
+ int64_t start_pos, size;
+} Fragment;
+
+typedef struct {
+ AVFormatContext *ctx;
+ int ctx_inited;
+ char dirname[1024];
+ uint8_t iobuf[32768];
+ URLContext *out; // Current output stream where all output is written
+ URLContext *out2; // Auxillary output stream where all output also is written
+ URLContext *tail_out; // The actual main output stream, if we're currently seeked back to write elsewhere
+ int64_t tail_pos, cur_pos, cur_start_pos;
+ int packets_written;
+ const char *stream_type_tag;
+ int nb_fragments, fragments_size, fragment_index;
+ Fragment **fragments;
+
+ const char *fourcc;
+ char *private_str;
+ int packet_size;
+ int audio_tag;
+} OutputStream;
+
+typedef struct {
+ const AVClass *class; /* Class for private options. */
+ int window_size;
+ int extra_window_size;
+ int lookahead_count;
+ int min_frag_duration;
+ int remove_at_exit;
+ OutputStream *streams;
+ int has_video, has_audio;
+ int nb_fragments;
+} SmoothStreamingContext;
+
+static int ism_write(void *opaque, uint8_t *buf, int buf_size)
+{
+ OutputStream *os = opaque;
+ if (os->out)
+ ffurl_write(os->out, buf, buf_size);
+ if (os->out2)
+ ffurl_write(os->out2, buf, buf_size);
+ os->cur_pos += buf_size;
+ if (os->cur_pos >= os->tail_pos)
+ os->tail_pos = os->cur_pos;
+ return buf_size;
+}
+
+static int64_t ism_seek(void *opaque, int64_t offset, int whence)
+{
+ OutputStream *os = opaque;
+ int i;
+ if (whence != SEEK_SET)
+ return AVERROR(ENOSYS);
+ if (os->tail_out) {
+ if (os->out) {
+ ffurl_close(os->out);
+ }
+ if (os->out2) {
+ ffurl_close(os->out2);
+ }
+ os->out = os->tail_out;
+ os->out2 = NULL;
+ os->tail_out = NULL;
+ }
+ if (offset >= os->cur_start_pos) {
+ ffurl_seek(os->out, offset - os->cur_start_pos, SEEK_SET);
+ os->cur_pos = offset;
+ return offset;
+ }
+ for (i = os->nb_fragments - 1; i >= 0; i--) {
+ Fragment *frag = os->fragments[i];
+ if (offset >= frag->start_pos && offset < frag->start_pos + frag->size) {
+ int ret;
+ AVDictionary *opts = NULL;
+ os->tail_out = os->out;
+ av_dict_set(&opts, "truncate", "0", 0);
+ ret = ffurl_open(&os->out, frag->file, AVIO_FLAG_READ_WRITE, &os->ctx->interrupt_callback, &opts);
+ av_dict_free(&opts);
+ if (ret < 0) {
+ os->out = os->tail_out;
+ os->tail_out = NULL;
+ return ret;
+ }
+ av_dict_set(&opts, "truncate", "0", 0);
+ ffurl_open(&os->out2, frag->infofile, AVIO_FLAG_READ_WRITE, &os->ctx->interrupt_callback, &opts);
+ av_dict_free(&opts);
+ ffurl_seek(os->out, offset - frag->start_pos, SEEK_SET);
+ if (os->out2)
+ ffurl_seek(os->out2, offset - frag->start_pos, SEEK_SET);
+ os->cur_pos = offset;
+ return offset;
+ }
+ }
+ return AVERROR(EIO);
+}
+
+static void get_private_data(OutputStream *os)
+{
+ AVCodecContext *codec = os->ctx->streams[0]->codec;
+ uint8_t *ptr = codec->extradata;
+ int size = codec->extradata_size;
+ int i;
+ if (codec->codec_id == AV_CODEC_ID_H264) {
+ ff_avc_write_annexb_extradata(ptr, &ptr, &size);
+ if (!ptr)
+ ptr = codec->extradata;
+ }
+ if (!ptr)
+ return;
+ os->private_str = av_mallocz(2*size + 1);
+ for (i = 0; i < size; i++)
+ snprintf(&os->private_str[2*i], 3, "%02x", ptr[i]);
+ if (ptr != codec->extradata)
+ av_free(ptr);
+}
+
+static void ism_free(AVFormatContext *s)
+{
+ SmoothStreamingContext *c = s->priv_data;
+ int i, j;
+ if (!c->streams)
+ return;
+ for (i = 0; i < s->nb_streams; i++) {
+ OutputStream *os = &c->streams[i];
+ ffurl_close(os->out);
+ ffurl_close(os->out2);
+ ffurl_close(os->tail_out);
+ os->out = os->out2 = os->tail_out = NULL;
+ if (os->ctx && os->ctx_inited)
+ av_write_trailer(os->ctx);
+ if (os->ctx && os->ctx->pb)
+ av_free(os->ctx->pb);
+ if (os->ctx)
+ avformat_free_context(os->ctx);
+ av_free(os->private_str);
+ for (j = 0; j < os->nb_fragments; j++)
+ av_free(os->fragments[j]);
+ av_free(os->fragments);
+ }
+ av_freep(&c->streams);
+}
+
+static int ism_write_header(AVFormatContext *s)
+{
+ SmoothStreamingContext *c = s->priv_data;
+ int ret = 0, i;
+ AVOutputFormat *oformat;
+
+ ret = mkdir(s->filename, 0777);
+ if (ret) {
+ av_log(s, AV_LOG_ERROR, "mkdir(%s): %s\n", s->filename, strerror(errno));
+ return AVERROR(errno);
+ }
+ ret = 0;
+
+ oformat = av_guess_format("ismv", NULL, NULL);
+ if (!oformat) {
+ ret = AVERROR_MUXER_NOT_FOUND;
+ goto fail;
+ }
+
+ c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
+ if (!c->streams) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ for (i = 0; i < s->nb_streams; i++) {
+ OutputStream *os = &c->streams[i];
+ AVFormatContext *ctx;
+ AVStream *st;
+ AVDictionary *opts = NULL;
+ char buf[10];
+
+ if (!s->streams[i]->codec->bit_rate) {
+ av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n", i);
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%d)", s->filename, s->streams[i]->codec->bit_rate);
+ mkdir(os->dirname, 0777);
+
+ ctx = avformat_alloc_context();
+ if (!ctx) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ os->ctx = ctx;
+ ctx->oformat = oformat;
+ ctx->interrupt_callback = s->interrupt_callback;
+
+ if (!(st = avformat_new_stream(ctx, NULL))) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ avcodec_copy_context(st->codec, s->streams[i]->codec);
+
+ ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), AVIO_FLAG_WRITE, os, NULL, ism_write, ism_seek);
+ if (!ctx->pb) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ snprintf(buf, sizeof(buf), "%d", c->lookahead_count);
+ av_dict_set(&opts, "ism_lookahead", buf, 0);
+ av_dict_set(&opts, "movflags", "frag_custom", 0);
+ if ((ret = avformat_write_header(ctx, &opts)) < 0) {
+ goto fail;
+ }
+ os->ctx_inited = 1;
+ avio_flush(ctx->pb);
+ av_dict_free(&opts);
+ s->streams[i]->time_base = st->time_base;
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ c->has_video = 1;
+ os->stream_type_tag = "video";
+ if (st->codec->codec_id == AV_CODEC_ID_H264) {
+ os->fourcc = "H264";
+ } else if (st->codec->codec_id == AV_CODEC_ID_VC1) {
+ os->fourcc = "WVC1";
+ } else {
+ av_log(s, AV_LOG_ERROR, "Unsupported video codec\n");
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ } else {
+ c->has_audio = 1;
+ os->stream_type_tag = "audio";
+ if (st->codec->codec_id == AV_CODEC_ID_AAC) {
+ os->fourcc = "AACL";
+ os->audio_tag = 0xff;
+ } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
+ os->fourcc = "WMAP";
+ os->audio_tag = 0x0162;
+ } else {
+ av_log(s, AV_LOG_ERROR, "Unsupported audio codec\n");
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ os->packet_size = st->codec->block_align ? st->codec->block_align : 4;
+ }
+ get_private_data(os);
+ }
+
+ if (!c->has_video && c->min_frag_duration <= 0) {
+ av_log(s, AV_LOG_WARNING, "no video stream and no min frag duration set\n");
+ ret = AVERROR(EINVAL);
+ }
+
+fail:
+ if (ret)
+ ism_free(s);
+ return ret;
+}
+
+static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
+{
+ AVIOContext *in;
+ int ret;
+ uint32_t len;
+ if ((ret = avio_open2(&in, filename, AVIO_FLAG_READ, &s->interrupt_callback, NULL)) < 0)
+ return ret;
+ ret = AVERROR(EIO);
+ *moof_size = avio_rb32(in);
+ if (*moof_size < 8 || *moof_size > size)
+ goto fail;
+ if (avio_rl32(in) != MKTAG('m','o','o','f'))
+ goto fail;
+ len = avio_rb32(in);
+ if (len > *moof_size)
+ goto fail;
+ if (avio_rl32(in) != MKTAG('m','f','h','d'))
+ goto fail;
+ avio_seek(in, len - 8, SEEK_CUR);
+ avio_rb32(in); /* traf size */
+ if (avio_rl32(in) != MKTAG('t','r','a','f'))
+ goto fail;
+ while (avio_tell(in) < *moof_size) {
+ uint32_t len = avio_rb32(in);
+ uint32_t tag = avio_rl32(in);
+ int64_t end = avio_tell(in) + len - 8;
+ if (len < 8 || len >= *moof_size)
+ goto fail;
+ if (tag == MKTAG('u','u','i','d')) {
+ const uint8_t tfxd[] = {
+ 0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
+ 0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
+ };
+ uint8_t uuid[16];
+ avio_read(in, uuid, 16);
+ if (!memcmp(uuid, tfxd, 16) && len >= 8 + 16 + 4 + 16) {
+ avio_seek(in, 4, SEEK_CUR);
+ *start_ts = avio_rb64(in);
+ *duration = avio_rb64(in);
+ ret = 0;
+ break;
+ }
+ }
+ avio_seek(in, end, SEEK_SET);
+ }
+fail:
+ avio_close(in);
+ return ret;
+}
+
+static int add_fragment(OutputStream *os, const char *file, const char *infofile, int64_t start_time, int64_t duration, int64_t start_pos, int64_t size)
+{
+ Fragment *frag;
+ if (os->nb_fragments >= os->fragments_size) {
+ os->fragments_size = (os->fragments_size + 1) * 2;
+ os->fragments = av_realloc(os->fragments, sizeof(*os->fragments)*os->fragments_size);
+ if (!os->fragments)
+ return AVERROR(ENOMEM);
+ }
+ frag = av_mallocz(sizeof(*frag));
+ if (!frag)
+ return AVERROR(ENOMEM);
+ av_strlcpy(frag->file, file, sizeof(frag->file));
+ av_strlcpy(frag->infofile, infofile, sizeof(frag->infofile));
+ frag->start_time = start_time;
+ frag->duration = duration;
+ frag->start_pos = start_pos;
+ frag->size = size;
+ frag->n = os->fragment_index;
+ os->fragments[os->nb_fragments++] = frag;
+ os->fragment_index++;
+ return 0;
+}
+
+static int copy_moof(AVFormatContext *s, const char* infile, const char *outfile, int64_t size)
+{
+ AVIOContext *in, *out;
+ int ret = 0;
+ if ((ret = avio_open2(&in, infile, AVIO_FLAG_READ, &s->interrupt_callback, NULL)) < 0)
+ return ret;
+ if ((ret = avio_open2(&out, outfile, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL)) < 0) {
+ avio_close(in);
+ return ret;
+ }
+ while (size > 0) {
+ uint8_t buf[8192];
+ int n = FFMIN(size, sizeof(buf));
+ n = avio_read(in, buf, n);
+ if (n <= 0) {
+ ret = AVERROR(EIO);
+ break;
+ }
+ avio_write(out, buf, n);
+ size -= n;
+ }
+ avio_flush(out);
+ avio_close(out);
+ avio_close(in);
+ return ret;
+}
+
+static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
+{
+ int removed = 0, i, start = 0;
+ if (os->nb_fragments <= 0)
+ return;
+ if (os->fragments[0]->n > 0)
+ removed = 1;
+ if (final)
+ skip = 0;
+ if (window_size)
+ start = FFMAX(os->nb_fragments - skip - window_size, 0);
+ for (i = start; i < os->nb_fragments - skip; i++) {
+ Fragment *frag = os->fragments[i];
+ if (!final || removed)
+ avio_printf(out, "<c t=\"%"PRIu64"\" d=\"%"PRIu64"\" />\n", frag->start_time, frag->duration);
+ else
+ avio_printf(out, "<c n=\"%d\" d=\"%"PRIu64"\" />\n", frag->n, frag->duration);
+ }
+}
+
+static int write_manifest(AVFormatContext *s, int final)
+{
+ SmoothStreamingContext *c = s->priv_data;
+ AVIOContext *out;
+ char filename[1024];
+ int ret, i, video_chunks = 0, audio_chunks = 0, video_streams = 0, audio_streams = 0;
+ int64_t duration = 0;
+
+ snprintf(filename, sizeof(filename), "%s/Manifest", s->filename);
+ ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
+ if (ret < 0)
+ return ret;
+ avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
+ for (i = 0; i < s->nb_streams; i++) {
+ OutputStream *os = &c->streams[i];
+ if (os->nb_fragments > 0) {
+ Fragment *last = os->fragments[os->nb_fragments - 1];
+ duration = last->start_time + last->duration;
+ }
+ if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ video_chunks = os->nb_fragments;
+ video_streams++;
+ } else {
+ audio_chunks = os->nb_fragments;
+ audio_streams++;
+ }
+ }
+ if (!final) {
+ duration = 0;
+ video_chunks = audio_chunks = 0;
+ }
+ if (c->window_size) {
+ video_chunks = FFMIN(video_chunks, c->window_size);
+ audio_chunks = FFMIN(audio_chunks, c->window_size);
+ }
+ avio_printf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" Duration=\"%"PRIu64"\"", duration);
+ if (!final)
+ avio_printf(out, " IsLive=\"true\" LookAheadFragmentCount=\"%d\" DVRWindowLength=\"0\"", c->lookahead_count);
+ avio_printf(out, ">\n");
+ if (c->has_video) {
+ int last = -1, index = 0;
+ avio_printf(out, "<StreamIndex Type=\"video\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n", video_streams, video_chunks);
+ for (i = 0; i < s->nb_streams; i++) {
+ OutputStream *os = &c->streams[i];
+ if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
+ continue;
+ last = i;
+ avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%d\" FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codec->bit_rate, os->fourcc, s->streams[i]->codec->width, s->streams[i]->codec->height, os->private_str);
+ index++;
+ }
+ output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
+ avio_printf(out, "</StreamIndex>\n");
+ }
+ if (c->has_audio) {
+ int last = -1, index = 0;
+ avio_printf(out, "<StreamIndex Type=\"audio\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n", audio_streams, audio_chunks);
+ for (i = 0; i < s->nb_streams; i++) {
+ OutputStream *os = &c->streams[i];
+ if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
+ continue;
+ last = i;
+ avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%d\" FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" BitsPerSample=\"16\" PacketSize=\"%d\" AudioTag=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codec->bit_rate, os->fourcc, s->streams[i]->codec->sample_rate, s->streams[i]->codec->channels, os->packet_size, os->audio_tag, os->private_str);
+ index++;
+ }
+ output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
+ avio_printf(out, "</StreamIndex>\n");
+ }
+ avio_printf(out, "</SmoothStreamingMedia>\n");
+ avio_flush(out);
+ avio_close(out);
+ return 0;
+}
+
+static int ism_flush(AVFormatContext *s, int final)
+{
+ SmoothStreamingContext *c = s->priv_data;
+ int i, ret = 0;
+
+ for (i = 0; i < s->nb_streams; i++) {
+ OutputStream *os = &c->streams[i];
+ char filename[1024], target_filename[1024], header_filename[1024];
+ int64_t start_pos = os->tail_pos, size;
+ int64_t start_ts, duration, moof_size;
+ if (!os->packets_written)
+ continue;
+
+ snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
+ ret = ffurl_open(&os->out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
+ if (ret < 0)
+ break;
+ os->cur_start_pos = os->tail_pos;
+ av_write_frame(os->ctx, NULL);
+ avio_flush(os->ctx->pb);
+ os->packets_written = 0;
+ if (!os->out || os->tail_out)
+ return AVERROR(EIO);
+
+ ffurl_close(os->out);
+ os->out = NULL;
+ size = os->tail_pos - start_pos;
+ if ((ret = parse_fragment(s, filename, &start_ts, &duration, &moof_size, size)) < 0)
+ break;
+ snprintf(header_filename, sizeof(header_filename), "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
+ snprintf(target_filename, sizeof(target_filename), "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
+ copy_moof(s, filename, header_filename, moof_size);
+ rename(filename, target_filename);
+ add_fragment(os, target_filename, header_filename, start_ts, duration, start_pos, size);
+ }
+
+ if (c->window_size || (final && c->remove_at_exit)) {
+ for (i = 0; i < s->nb_streams; i++) {
+ OutputStream *os = &c->streams[i];
+ int j;
+ int remove = os->nb_fragments - c->window_size - c->extra_window_size - c->lookahead_count;
+ if (final && c->remove_at_exit)
+ remove = os->nb_fragments;
+ if (remove > 0) {
+ for (j = 0; j < remove; j++) {
+ unlink(os->fragments[j]->file);
+ unlink(os->fragments[j]->infofile);
+ av_free(os->fragments[j]);
+ }
+ os->nb_fragments -= remove;
+ memmove(os->fragments, os->fragments + remove, os->nb_fragments * sizeof(*os->fragments));
+ }
+ if (final && c->remove_at_exit)
+ rmdir(os->dirname);
+ }
+ }
+
+ write_manifest(s, final);
+ return ret;
+}
+
+static int ism_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ SmoothStreamingContext *c = s->priv_data;
+ AVStream *st = s->streams[pkt->stream_index];
+ OutputStream *os = &c->streams[pkt->stream_index];
+ int64_t end_pts = (c->nb_fragments + 1) * c->min_frag_duration;
+
+ if ((!c->has_video || st->codec->codec_type == AVMEDIA_TYPE_VIDEO) &&
+ av_compare_ts(pkt->pts, st->time_base,
+ end_pts, AV_TIME_BASE_Q) >= 0 &&
+ pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) {
+
+ ism_flush(s, 0);
+ c->nb_fragments++;
+ }
+
+ os->packets_written++;
+ return ff_write_chained(os->ctx, 0, pkt, s);
+}
+
+static int ism_write_trailer(AVFormatContext *s)
+{
+ SmoothStreamingContext *c = s->priv_data;
+ ism_flush(s, 1);
+
+ if (c->remove_at_exit) {
+ char filename[1024];
+ snprintf(filename, sizeof(filename), "%s/Manifest", s->filename);
+ unlink(filename);
+ rmdir(s->filename);
+ }
+
+ ism_free(s);
+ return 0;
+}
+
+#define OFFSET(x) offsetof(SmoothStreamingContext, x)
+#define E AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
+ { "extra_window_size", "number of fragments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
+ { "lookahead_count", "number of lookahead fragments", OFFSET(lookahead_count), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, E },
+ { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
+ { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
+ { NULL },
+};
+
+static const AVClass ism_class = {
+ .class_name = "smooth streaming muxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+
+AVOutputFormat ff_smoothstreaming_muxer = {
+ .name = "smoothstreaming",
+ .long_name = NULL_IF_CONFIG_SMALL("Smooth Streaming Muxer"),
+ .priv_data_size = sizeof(SmoothStreamingContext),
+ .audio_codec = AV_CODEC_ID_AAC,
+ .video_codec = AV_CODEC_ID_H264,
+ .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE,
+ .write_header = ism_write_header,
+ .write_packet = ism_write_packet,
+ .write_trailer = ism_write_trailer,
+ .priv_class = &ism_class,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-01 17:14:27 +0000