Adding modified segmenter on the branch

3 files changed, 774 insertions, 0 deletions

diff --git a/segmenter/COPYING b/segmenter/COPYING
new file mode 100644
index 0000000..d511905
--- /dev/null
+++ b/segmenter/COPYING
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
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+Foundation's software and to any other program whose authors commit to
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+
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+You may charge a fee for the physical act of transferring a copy, and
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+
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+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    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.
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+    You should have received a copy of the GNU General Public License along
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+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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+Also add information on how to contact you by electronic and paper mail.
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+    This is free software, and you are welcome to redistribute it
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+The hypothetical commands `show w' and `show c' should show the appropriate
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+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/segmenter/Makefile b/segmenter/Makefile
new file mode 100644
index 0000000..c9ec717
--- /dev/null
+++ b/segmenter/Makefile
@@ -0,0 +1,11 @@
+all:
+	gcc -Wall -g segmenter.c -o segmenter -lavformat -lavcodec -lavutil -lbz2
+
+clean:
+	rm segmenter
+
+install: segmenter
+	cp segmenter /usr/local/bin/
+
+uninstall:
+	rm /usr/local/bin/segmenter
diff --git a/segmenter/segmenter.c b/segmenter/segmenter.c
new file mode 100644
index 0000000..b8cd963
--- /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 = 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