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/*
* 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 "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;
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);
}
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]);
exit(1);
}
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]);
exit(1);
}
}
remove_filename = malloc(sizeof(char) * (strlen(output_prefix) + 15));
if (!remove_filename) {
fprintf(stderr, "Could not allocate space for remove filenames\n");
exit(1);
}
output_filename = malloc(sizeof(char) * (strlen(output_prefix) + 15));
if (!output_filename) {
fprintf(stderr, "Could not allocate space for output filenames\n");
exit(1);
}
tmp_index = malloc(strlen(index) + 2);
if (!tmp_index) {
fprintf(stderr, "Could not allocate space for temporary index filename\n");
exit(1);
}
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");
exit(1);
}
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);
exit(1);
}
if (av_find_stream_info(ic) < 0) {
fprintf(stderr, "Could not read stream information\n");
exit(1);
}
ofmt = guess_format("mpegts", NULL, NULL);
if (!ofmt) {
fprintf(stderr, "Could not find MPEG-TS muxer\n");
exit(1);
}
oc = avformat_alloc_context();
if (!oc) {
fprintf(stderr, "Could not allocated output context");
exit(1);
}
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");
exit(1);
}
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);
exit(1);
}
if (av_write_header(oc)) {
fprintf(stderr, "Could not write mpegts header to first output file\n");
exit(1);
}
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);
}
return 0;
}
// vim:sw=4:tw=4:ts=4:ai:expandtab
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