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-rw-r--r--segmenter/segmenter.c424
1 files changed, 424 insertions, 0 deletions
diff --git a/segmenter/segmenter.c b/segmenter/segmenter.c
new file mode 100644
index 0000000..19ad979
--- /dev/null
+++ b/segmenter/segmenter.c
@@ -0,0 +1,424 @@
+/*
+ * Copyright (c) 2009 Chase Douglas
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "libavformat/avformat.h"
+
+static AVStream *add_output_stream(AVFormatContext *output_format_context, AVStream *input_stream) {
+ AVCodecContext *input_codec_context;
+ AVCodecContext *output_codec_context;
+ AVStream *output_stream;
+
+ output_stream = av_new_stream(output_format_context, 0);
+ if (!output_stream) {
+ fprintf(stderr, "Could not allocate stream\n");
+ exit(1);
+ }
+
+ input_codec_context = input_stream->codec;
+ output_codec_context = output_stream->codec;
+
+ output_codec_context->codec_id = input_codec_context->codec_id;
+ output_codec_context->codec_type = input_codec_context->codec_type;
+ output_codec_context->codec_tag = input_codec_context->codec_tag;
+ output_codec_context->bit_rate = input_codec_context->bit_rate;
+ output_codec_context->extradata = input_codec_context->extradata;
+ output_codec_context->extradata_size = input_codec_context->extradata_size;
+
+ if(av_q2d(input_codec_context->time_base) * input_codec_context->ticks_per_frame > av_q2d(input_stream->time_base) && av_q2d(input_stream->time_base) < 1.0/1000) {
+ output_codec_context->time_base = input_codec_context->time_base;
+ output_codec_context->time_base.num *= input_codec_context->ticks_per_frame;
+ }
+ else {
+ output_codec_context->time_base = input_stream->time_base;
+ }
+
+ switch (input_codec_context->codec_type) {
+ case CODEC_TYPE_AUDIO:
+ output_codec_context->channel_layout = input_codec_context->channel_layout;
+ output_codec_context->sample_rate = input_codec_context->sample_rate;
+ output_codec_context->channels = input_codec_context->channels;
+ output_codec_context->frame_size = input_codec_context->frame_size;
+ if ((input_codec_context->block_align == 1 && input_codec_context->codec_id == CODEC_ID_MP3) || input_codec_context->codec_id == CODEC_ID_AC3) {
+ output_codec_context->block_align = 0;
+ }
+ else {
+ output_codec_context->block_align = input_codec_context->block_align;
+ }
+ break;
+ case CODEC_TYPE_VIDEO:
+ output_codec_context->pix_fmt = input_codec_context->pix_fmt;
+ output_codec_context->width = input_codec_context->width;
+ output_codec_context->height = input_codec_context->height;
+ output_codec_context->has_b_frames = input_codec_context->has_b_frames;
+
+ if (output_format_context->oformat->flags & AVFMT_GLOBALHEADER) {
+ output_codec_context->flags |= CODEC_FLAG_GLOBAL_HEADER;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return output_stream;
+}
+
+int write_index_file(const char index[], const char tmp_index[], const unsigned int segment_duration, const char output_prefix[], const char http_prefix[], const unsigned int first_segment, const unsigned int last_segment, const int end, const int window) {
+ FILE *index_fp;
+ char *write_buf;
+ unsigned int i;
+
+ index_fp = fopen(tmp_index, "w");
+ if (!index_fp) {
+ fprintf(stderr, "Could not open temporary m3u8 index file (%s), no index file will be created\n", tmp_index);
+ return -1;
+ }
+
+ write_buf = malloc(sizeof(char) * 1024);
+ if (!write_buf) {
+ fprintf(stderr, "Could not allocate write buffer for index file, index file will be invalid\n");
+ fclose(index_fp);
+ return -1;
+ }
+
+ if (window) {
+ snprintf(write_buf, 1024, "#EXTM3U\n#EXT-X-TARGETDURATION:%u\n#EXT-X-MEDIA-SEQUENCE:%u\n", segment_duration, first_segment);
+ }
+ else {
+ snprintf(write_buf, 1024, "#EXTM3U\n#EXT-X-TARGETDURATION:%u\n", segment_duration);
+ }
+ if (fwrite(write_buf, strlen(write_buf), 1, index_fp) != 1) {
+ fprintf(stderr, "Could not write to m3u8 index file, will not continue writing to index file\n");
+ free(write_buf);
+ fclose(index_fp);
+ return -1;
+ }
+
+ for (i = first_segment; i <= last_segment; i++) {
+ snprintf(write_buf, 1024, "#EXTINF:%u,\n%s%s-%u.ts\n", segment_duration, http_prefix, output_prefix, i);
+ if (fwrite(write_buf, strlen(write_buf), 1, index_fp) != 1) {
+ fprintf(stderr, "Could not write to m3u8 index file, will not continue writing to index file\n");
+ free(write_buf);
+ fclose(index_fp);
+ return -1;
+ }
+ }
+
+ if (end) {
+ snprintf(write_buf, 1024, "#EXT-X-ENDLIST\n");
+ if (fwrite(write_buf, strlen(write_buf), 1, index_fp) != 1) {
+ fprintf(stderr, "Could not write last file and endlist tag to m3u8 index file\n");
+ free(write_buf);
+ fclose(index_fp);
+ return -1;
+ }
+ }
+
+ free(write_buf);
+ fclose(index_fp);
+
+ return rename(tmp_index, index);
+}
+
+int main(int argc, char **argv)
+{
+ const char *input;
+ const char *output_prefix;
+ double segment_duration;
+ char *segment_duration_check;
+ const char *index;
+ char *tmp_index;
+ const char *http_prefix;
+ long max_tsfiles = 0;
+ char *max_tsfiles_check;
+ double prev_segment_time = 0;
+ unsigned int output_index = 1;
+ AVInputFormat *ifmt;
+ AVOutputFormat *ofmt;
+ AVFormatContext *ic = NULL;
+ AVFormatContext *oc;
+ AVStream *video_st;
+ AVStream *audio_st;
+ AVCodec *codec;
+ char *output_filename;
+ char *remove_filename;
+ int video_index;
+ int audio_index;
+ unsigned int first_segment = 1;
+ unsigned int last_segment = 0;
+ int write_index = 1;
+ int decode_done;
+ char *dot;
+ int ret;
+ int i;
+ int remove_file;
+ FILE * pid_file;
+
+ if (argc < 6 || argc > 7) {
+ fprintf(stderr, "Usage: %s <input MPEG-TS file> <segment duration in seconds> <output MPEG-TS file prefix> <output m3u8 index file> <http prefix> [<segment window size>]\n", argv[0]);
+ exit(1);
+ }
+
+ // Create PID file
+ pid_file=fopen("./segmenter.pid", "w");
+ if (pid_file)
+ {
+ fprintf(pid_file, "%d", getpid());
+ fclose(pid_file);
+ }
+
+ av_register_all();
+
+ input = argv[1];
+ if (!strcmp(input, "-")) {
+ input = "pipe:";
+ }
+ segment_duration = strtod(argv[2], &segment_duration_check);
+ if (segment_duration_check == argv[2] || segment_duration == HUGE_VAL || segment_duration == -HUGE_VAL) {
+ fprintf(stderr, "Segment duration time (%s) invalid\n", argv[2]);
+ goto error;
+ }
+ output_prefix = argv[3];
+ index = argv[4];
+ http_prefix=argv[5];
+ if (argc == 7) {
+ max_tsfiles = strtol(argv[6], &max_tsfiles_check, 10);
+ if (max_tsfiles_check == argv[6] || max_tsfiles < 0 || max_tsfiles >= INT_MAX) {
+ fprintf(stderr, "Maximum number of ts files (%s) invalid\n", argv[6]);
+ goto error;
+ }
+ }
+
+ remove_filename = malloc(sizeof(char) * (strlen(output_prefix) + 15));
+ if (!remove_filename) {
+ fprintf(stderr, "Could not allocate space for remove filenames\n");
+ goto error;
+ }
+
+ output_filename = malloc(sizeof(char) * (strlen(output_prefix) + 15));
+ if (!output_filename) {
+ fprintf(stderr, "Could not allocate space for output filenames\n");
+ goto error;
+ }
+
+ tmp_index = malloc(strlen(index) + 2);
+ if (!tmp_index) {
+ fprintf(stderr, "Could not allocate space for temporary index filename\n");
+ goto error;
+ }
+
+ strncpy(tmp_index, index, strlen(index) + 2);
+ dot = strrchr(tmp_index, '/');
+ dot = dot ? dot + 1 : tmp_index;
+ for (i = strlen(tmp_index) + 1; i > dot - tmp_index; i--) {
+ tmp_index[i] = tmp_index[i - 1];
+ }
+ *dot = '.';
+
+ ifmt = av_find_input_format("mpegts");
+ if (!ifmt) {
+ fprintf(stderr, "Could not find MPEG-TS demuxer\n");
+ goto error;
+ }
+
+ ret = av_open_input_file(&ic, input, ifmt, 0, NULL);
+ if (ret != 0) {
+ fprintf(stderr, "Could not open input file, make sure it is an mpegts file: %d\n", ret);
+ goto error;
+ }
+
+ if (av_find_stream_info(ic) < 0) {
+ fprintf(stderr, "Could not read stream information\n");
+ goto error;
+ }
+
+ ofmt = av_guess_format("mpegts", NULL, NULL);
+ if (!ofmt) {
+ fprintf(stderr, "Could not find MPEG-TS muxer\n");
+ goto error;
+ }
+
+ oc = avformat_alloc_context();
+ if (!oc) {
+ fprintf(stderr, "Could not allocated output context");
+ goto error;
+ }
+ oc->oformat = ofmt;
+
+ video_index = -1;
+ audio_index = -1;
+
+ for (i = 0; i < ic->nb_streams && (video_index < 0 || audio_index < 0); i++) {
+ switch (ic->streams[i]->codec->codec_type) {
+ case CODEC_TYPE_VIDEO:
+ video_index = i;
+ ic->streams[i]->discard = AVDISCARD_NONE;
+ video_st = add_output_stream(oc, ic->streams[i]);
+ break;
+ case CODEC_TYPE_AUDIO:
+ audio_index = i;
+ ic->streams[i]->discard = AVDISCARD_NONE;
+ audio_st = add_output_stream(oc, ic->streams[i]);
+ break;
+ default:
+ ic->streams[i]->discard = AVDISCARD_ALL;
+ break;
+ }
+ }
+
+ if (av_set_parameters(oc, NULL) < 0) {
+ fprintf(stderr, "Invalid output format parameters\n");
+ goto error;
+ }
+
+ dump_format(oc, 0, output_prefix, 1);
+
+ codec = avcodec_find_decoder(video_st->codec->codec_id);
+ if (!codec) {
+ fprintf(stderr, "Could not find video decoder, key frames will not be honored\n");
+ }
+
+ if (avcodec_open(video_st->codec, codec) < 0) {
+ fprintf(stderr, "Could not open video decoder, key frames will not be honored\n");
+ }
+
+ snprintf(output_filename, strlen(output_prefix) + 15, "%s-%u.ts", output_prefix, output_index++);
+ if (url_fopen(&oc->pb, output_filename, URL_WRONLY) < 0) {
+ fprintf(stderr, "Could not open '%s'\n", output_filename);
+ goto error;
+ }
+
+ if (av_write_header(oc)) {
+ fprintf(stderr, "Could not write mpegts header to first output file\n");
+ goto error;
+ }
+
+ write_index = !write_index_file(index, tmp_index, segment_duration, output_prefix, http_prefix, first_segment, last_segment, 0, max_tsfiles);
+
+ do {
+ double segment_time;
+ AVPacket packet;
+
+ decode_done = av_read_frame(ic, &packet);
+ if (decode_done < 0) {
+ break;
+ }
+
+ if (av_dup_packet(&packet) < 0) {
+ fprintf(stderr, "Could not duplicate packet");
+ av_free_packet(&packet);
+ break;
+ }
+
+ if (packet.stream_index == video_index && (packet.flags & PKT_FLAG_KEY)) {
+ segment_time = (double)video_st->pts.val * video_st->time_base.num / video_st->time_base.den;
+ }
+ else if (video_index < 0) {
+ segment_time = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
+ }
+ else {
+ segment_time = prev_segment_time;
+ }
+
+ if (segment_time - prev_segment_time >= segment_duration) {
+ put_flush_packet(oc->pb);
+ url_fclose(oc->pb);
+
+ if (max_tsfiles && (int)(last_segment - first_segment) >= max_tsfiles - 1) {
+ remove_file = 1;
+ first_segment++;
+ }
+ else {
+ remove_file = 0;
+ }
+
+ if (write_index) {
+ write_index = !write_index_file(index, tmp_index, segment_duration, output_prefix, http_prefix, first_segment, ++last_segment, 0, max_tsfiles);
+ }
+
+ if (remove_file) {
+ snprintf(remove_filename, strlen(output_prefix) + 15, "%s-%u.ts", output_prefix, first_segment - 1);
+ remove(remove_filename);
+ }
+
+ snprintf(output_filename, strlen(output_prefix) + 15, "%s-%u.ts", output_prefix, output_index++);
+ if (url_fopen(&oc->pb, output_filename, URL_WRONLY) < 0) {
+ fprintf(stderr, "Could not open '%s'\n", output_filename);
+ break;
+ }
+
+ prev_segment_time = segment_time;
+ }
+
+ ret = av_interleaved_write_frame(oc, &packet);
+ if (ret < 0) {
+ fprintf(stderr, "Warning: Could not write frame of stream\n");
+ }
+ else if (ret > 0) {
+ fprintf(stderr, "End of stream requested\n");
+ av_free_packet(&packet);
+ break;
+ }
+
+ av_free_packet(&packet);
+ } while (!decode_done);
+
+ av_write_trailer(oc);
+
+ avcodec_close(video_st->codec);
+
+ for(i = 0; i < oc->nb_streams; i++) {
+ av_freep(&oc->streams[i]->codec);
+ av_freep(&oc->streams[i]);
+ }
+
+ url_fclose(oc->pb);
+ av_free(oc);
+
+ if (max_tsfiles && (int)(last_segment - first_segment) >= max_tsfiles - 1) {
+ remove_file = 1;
+ first_segment++;
+ }
+ else {
+ remove_file = 0;
+ }
+
+ if (write_index) {
+ write_index_file(index, tmp_index, segment_duration, output_prefix, http_prefix, first_segment, ++last_segment, 1, max_tsfiles);
+ }
+
+ if (remove_file) {
+ snprintf(remove_filename, strlen(output_prefix) + 15, "%s-%u.ts", output_prefix, first_segment - 1);
+ remove(remove_filename);
+ }
+
+ remove("./segmenter.pid");
+
+ return 0;
+
+error:
+ remove("./segmenter.pid");
+
+ return 1;
+
+}
+
+// vim:sw=4:tw=4:ts=4:ai:expandtab
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