#include "libavutil/parseutils.h"
#include "libavutil/mathematics.h"
+typedef enum {
+ LIST_TYPE_UNDEFINED = -1,
+ LIST_TYPE_FLAT = 0,
+ LIST_TYPE_CSV,
+ LIST_TYPE_M3U8,
+ LIST_TYPE_EXT, ///< deprecated
+ LIST_TYPE_NB,
+} ListType;
+
+
+#define SEGMENT_LIST_FLAG_CACHE 1
+#define SEGMENT_LIST_FLAG_LIVE 2
+
typedef struct {
const AVClass *class; /**< Class for private options. */
- int number;
+ int segment_idx; ///< index of the segment file to write, starting from 0
+ int segment_idx_wrap; ///< number after which the index wraps
+ int segment_count; ///< number of segment files already written
AVOutputFormat *oformat;
AVFormatContext *avf;
- char *format; /**< Set by a private option. */
- char *list; /**< Set by a private option. */
- float time; /**< Set by a private option. */
- int size; /**< Set by a private option. */
- int wrap; /**< Set by a private option. */
+ char *format; ///< format to use for output segment files
+ char *list; ///< filename for the segment list file
+ int list_count; ///< list counter
+ int list_flags; ///< flags affecting list generation
+ int list_size; ///< number of entries for the segment list file
+ double list_max_segment_time; ///< max segment time in the current list
+ ListType list_type; ///< set the list type
+ AVIOContext *list_pb; ///< list file put-byte context
+ char *time_str; ///< segment duration specification string
+ int64_t time; ///< segment duration
+ char *times_str; ///< segment times specification string
+ int64_t *times; ///< list of segment interval specification
+ int nb_times; ///< number of elments in the times array
+ char *time_delta_str; ///< approximation value duration used for the segment times
+ int64_t time_delta;
int individual_header_trailer; /**< Set by a private option. */
- int64_t offset_time;
- int64_t recording_time;
+ int write_header_trailer; /**< Set by a private option. */
int has_video;
- AVIOContext *pb;
+ double start_time, end_time;
} SegmentContext;
+static void print_csv_escaped_str(AVIOContext *ctx, const char *str)
+{
+ int needs_quoting = !!str[strcspn(str, "\",\n\r")];
+
+ if (needs_quoting)
+ avio_w8(ctx, '"');
+
+ for (; *str; str++) {
+ if (*str == '"')
+ avio_w8(ctx, '"');
+ avio_w8(ctx, *str);
+ }
+ if (needs_quoting)
+ avio_w8(ctx, '"');
+}
+
static int segment_mux_init(AVFormatContext *s)
{
SegmentContext *seg = s->priv_data;
return 0;
}
-static int segment_end(AVFormatContext *oc, int write_trailer)
+static int segment_list_open(AVFormatContext *s)
{
+ SegmentContext *seg = s->priv_data;
+ int ret;
+
+ ret = avio_open2(&seg->list_pb, seg->list, AVIO_FLAG_WRITE,
+ &s->interrupt_callback, NULL);
+ if (ret < 0)
+ return ret;
+ seg->list_max_segment_time = 0;
+
+ if (seg->list_type == LIST_TYPE_M3U8) {
+ avio_printf(seg->list_pb, "#EXTM3U\n");
+ avio_printf(seg->list_pb, "#EXT-X-VERSION:3\n");
+ avio_printf(seg->list_pb, "#EXT-X-MEDIA-SEQUENCE:%d\n", seg->list_count);
+ avio_printf(seg->list_pb, "#EXT-X-ALLOWCACHE:%d\n",
+ !!(seg->list_flags & SEGMENT_LIST_FLAG_CACHE));
+ if (seg->list_flags & SEGMENT_LIST_FLAG_LIVE)
+ avio_printf(seg->list_pb,
+ "#EXT-X-TARGETDURATION:%"PRId64"\n", seg->time / 1000000);
+ }
+
+ return ret;
+}
+
+static void segment_list_close(AVFormatContext *s)
+{
+ SegmentContext *seg = s->priv_data;
+
+ if (seg->list_type == LIST_TYPE_M3U8) {
+ if (!(seg->list_flags & SEGMENT_LIST_FLAG_LIVE))
+ avio_printf(seg->list_pb, "#EXT-X-TARGETDURATION:%d\n",
+ (int)ceil(seg->list_max_segment_time));
+ avio_printf(seg->list_pb, "#EXT-X-ENDLIST\n");
+ }
+ seg->list_count++;
+
+ avio_close(seg->list_pb);
+}
+
+static int segment_end(AVFormatContext *s, int write_trailer)
+{
+ SegmentContext *seg = s->priv_data;
+ AVFormatContext *oc = seg->avf;
int ret = 0;
- av_write_frame(oc, NULL); /* Flush any buffered data */
+ av_write_frame(oc, NULL); /* Flush any buffered data (fragmented mp4) */
if (write_trailer)
- av_write_trailer(oc);
+ ret = av_write_trailer(oc);
+
+ if (ret < 0)
+ av_log(s, AV_LOG_ERROR, "Failure occurred when ending segment '%s'\n",
+ oc->filename);
+
+ if (seg->list) {
+ if (seg->list_size && !(seg->segment_count % seg->list_size)) {
+ segment_list_close(s);
+ if ((ret = segment_list_open(s)) < 0)
+ goto end;
+ }
+
+ if (seg->list_type == LIST_TYPE_FLAT) {
+ avio_printf(seg->list_pb, "%s\n", oc->filename);
+ } else if (seg->list_type == LIST_TYPE_CSV || seg->list_type == LIST_TYPE_EXT) {
+ print_csv_escaped_str(seg->list_pb, oc->filename);
+ avio_printf(seg->list_pb, ",%f,%f\n", seg->start_time, seg->end_time);
+ } else if (seg->list_type == LIST_TYPE_M3U8) {
+ avio_printf(seg->list_pb, "#EXTINF:%f,\n%s\n",
+ seg->end_time - seg->start_time, oc->filename);
+ }
+ seg->list_max_segment_time = FFMAX(seg->end_time - seg->start_time, seg->list_max_segment_time);
+ avio_flush(seg->list_pb);
+ }
+
+end:
avio_close(oc->pb);
return ret;
}
+static int parse_times(void *log_ctx, int64_t **times, int *nb_times,
+ const char *times_str)
+{
+ char *p;
+ int i, ret = 0;
+ char *times_str1 = av_strdup(times_str);
+ char *saveptr = NULL;
+
+ if (!times_str1)
+ return AVERROR(ENOMEM);
+
+#define FAIL(err) ret = err; goto end
+
+ *nb_times = 1;
+ for (p = times_str1; *p; p++)
+ if (*p == ',')
+ (*nb_times)++;
+
+ *times = av_malloc(sizeof(**times) * *nb_times);
+ if (!*times) {
+ av_log(log_ctx, AV_LOG_ERROR, "Could not allocate forced times array\n");
+ FAIL(AVERROR(ENOMEM));
+ }
+
+ p = times_str1;
+ for (i = 0; i < *nb_times; i++) {
+ int64_t t;
+ char *tstr = av_strtok(p, ",", &saveptr);
+ av_assert0(tstr);
+ p = NULL;
+
+ ret = av_parse_time(&t, tstr, 1);
+ if (ret < 0) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Invalid time duration specification in %s\n", p);
+ FAIL(AVERROR(EINVAL));
+ }
+ (*times)[i] = t;
+
+ /* check on monotonicity */
+ if (i && (*times)[i-1] > (*times)[i]) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Specified time %f is greater than the following time %f\n",
+ (float)((*times)[i])/1000000, (float)((*times)[i-1])/1000000);
+ FAIL(AVERROR(EINVAL));
+ }
+ }
+
+end:
+ av_free(times_str1);
+ return ret;
+}
+
+ static int open_null_ctx(AVIOContext **ctx)
+ {
+ int buf_size = 32768;
+ uint8_t *buf = av_malloc(buf_size);
+ if (!buf)
+ return AVERROR(ENOMEM);
+ *ctx = avio_alloc_context(buf, buf_size, AVIO_FLAG_WRITE, NULL, NULL, NULL, NULL);
+ if (!*ctx) {
+ av_free(buf);
+ return AVERROR(ENOMEM);
+ }
+ return 0;
+ }
+
+ static void close_null_ctx(AVIOContext *pb)
+ {
+ av_free(pb->buffer);
+ av_free(pb);
+ }
+
static int seg_write_header(AVFormatContext *s)
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc = NULL;
int ret, i;
- seg->number = 0;
- seg->offset_time = 0;
- seg->recording_time = seg->time * 1000000;
+ seg->segment_count = 0;
+ if (!seg->write_header_trailer)
+ seg->individual_header_trailer = 0;
- if (seg->list)
- if ((ret = avio_open2(&seg->pb, seg->list, AVIO_FLAG_WRITE,
- &s->interrupt_callback, NULL)) < 0)
+ if (seg->time_str && seg->times_str) {
+ av_log(s, AV_LOG_ERROR,
+ "segment_time and segment_times options are mutually exclusive, select just one of them\n");
+ return AVERROR(EINVAL);
+ }
+
+ if ((seg->list_flags & SEGMENT_LIST_FLAG_LIVE) && seg->times_str) {
+ av_log(s, AV_LOG_ERROR,
+ "segment_flags +live and segment_times options are mutually exclusive:"
+ "specify -segment_time if you want a live-friendly list\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (seg->times_str) {
+ if ((ret = parse_times(s, &seg->times, &seg->nb_times, seg->times_str)) < 0)
+ return ret;
+ } else {
+ /* set default value if not specified */
+ if (!seg->time_str)
+ seg->time_str = av_strdup("2");
+ if ((ret = av_parse_time(&seg->time, seg->time_str, 1)) < 0) {
+ av_log(s, AV_LOG_ERROR,
+ "Invalid time duration specification '%s' for segment_time option\n",
+ seg->time_str);
+ return ret;
+ }
+ }
+
+ if (seg->time_delta_str) {
+ if ((ret = av_parse_time(&seg->time_delta, seg->time_delta_str, 1)) < 0) {
+ av_log(s, AV_LOG_ERROR,
+ "Invalid time duration specification '%s' for delta option\n",
+ seg->time_delta_str);
+ return ret;
+ }
+ }
+
+ if (seg->list) {
+ if (seg->list_type == LIST_TYPE_UNDEFINED) {
+ if (av_match_ext(seg->list, "csv" )) seg->list_type = LIST_TYPE_CSV;
+ else if (av_match_ext(seg->list, "ext" )) seg->list_type = LIST_TYPE_EXT;
+ else if (av_match_ext(seg->list, "m3u8")) seg->list_type = LIST_TYPE_M3U8;
+ else seg->list_type = LIST_TYPE_FLAT;
+ }
+ if ((ret = segment_list_open(s)) < 0)
goto fail;
+ }
+ if (seg->list_type == LIST_TYPE_EXT)
+ av_log(s, AV_LOG_WARNING, "'ext' list type option is deprecated in favor of 'csv'\n");
for (i = 0; i < s->nb_streams; i++)
seg->has_video +=
ret = AVERROR(EINVAL);
goto fail;
}
+ seg->segment_count++;
- if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
- &s->interrupt_callback, NULL)) < 0)
- goto fail;
+ if (seg->write_header_trailer) {
+ if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
+ &s->interrupt_callback, NULL)) < 0)
+ goto fail;
+ } else {
+ if ((ret = open_null_ctx(&oc->pb)) < 0)
+ goto fail;
+ }
if ((ret = avformat_write_header(oc, NULL)) < 0) {
avio_close(oc->pb);
goto fail;
}
- if (seg->list) {
- avio_printf(seg->pb, "%s\n", oc->filename);
- avio_flush(seg->pb);
- }
-
+ if (!seg->write_header_trailer) {
+ close_null_ctx(oc->pb);
+ if ((ret = avio_open2(&oc->pb, oc->filename, AVIO_FLAG_WRITE,
+ &s->interrupt_callback, NULL)) < 0)
+ goto fail;
+ }
+
fail:
if (ret) {
if (seg->list)
{
SegmentContext *seg = s->priv_data;
AVFormatContext *oc = seg->avf;
- int ret = segment_end(s, 1);
+ int ret;
+ if (!seg->write_header_trailer) {
- ret = segment_end(oc, 0);
++ ret = segment_end(s, 0);
+ open_null_ctx(&oc->pb);
+ av_write_trailer(oc);
+ close_null_ctx(oc->pb);
+ } else {
- ret = segment_end(oc, 1);
++ ret = segment_end(s, 1);
+ }
if (seg->list)
- avio_close(seg->pb);
+ segment_list_close(s);
+
+ av_opt_free(seg);
+ av_freep(&seg->times);
+
avformat_free_context(oc);
return ret;
}
#define OFFSET(x) offsetof(SegmentContext, x)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
- { "segment_format", "container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
- { "segment_time", "segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E },
- { "segment_list", "output the segment list", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
- { "segment_list_size", "maximum number of playlist entries", OFFSET(size), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E },
- { "segment_wrap", "number after which the index wraps", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
+ { "segment_format", "set container format used for the segments", OFFSET(format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
+ { "segment_list", "set the segment list filename", OFFSET(list), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
+
+ { "segment_list_flags","set flags affecting segment list generation", OFFSET(list_flags), AV_OPT_TYPE_FLAGS, {.i64 = SEGMENT_LIST_FLAG_CACHE }, 0, UINT_MAX, E, "list_flags"},
+ { "cache", "allow list caching", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_CACHE }, INT_MIN, INT_MAX, E, "list_flags"},
+ { "live", "enable live-friendly list generation (useful for HLS)", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_LIST_FLAG_LIVE }, INT_MIN, INT_MAX, E, "list_flags"},
+
+ { "segment_list_size", "set the maximum number of playlist entries", OFFSET(list_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
+ { "segment_list_type", "set the segment list type", OFFSET(list_type), AV_OPT_TYPE_INT, {.i64 = LIST_TYPE_UNDEFINED}, -1, LIST_TYPE_NB-1, E, "list_type" },
+ { "flat", "flat format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_FLAT }, INT_MIN, INT_MAX, 0, "list_type" },
+ { "csv", "csv format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_CSV }, INT_MIN, INT_MAX, 0, "list_type" },
+ { "ext", "extended format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_EXT }, INT_MIN, INT_MAX, 0, "list_type" },
+ { "m3u8", "M3U8 format", 0, AV_OPT_TYPE_CONST, {.i64=LIST_TYPE_M3U8 }, INT_MIN, INT_MAX, 0, "list_type" },
+ { "segment_time", "set segment duration", OFFSET(time_str),AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
+ { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta_str), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, E },
+ { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E },
+ { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E },
{ "individual_header_trailer", "write header/trailer to each segment", OFFSET(individual_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
+ { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E },
{ NULL },
};
projects / ffmpeg / commitdiff