* http://tools.ietf.org/html/draft-pantos-http-live-streaming
*/
-#define _XOPEN_SOURCE 600
#include "libavutil/avstring.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/dict.h"
#include "avformat.h"
#include "internal.h"
#include <unistd.h>
* one anonymous toplevel variant for this, to maintain the structure.
*/
+enum KeyType {
+ KEY_NONE,
+ KEY_AES_128,
+};
+
struct segment {
int duration;
char url[MAX_URL_SIZE];
+ char key[MAX_URL_SIZE];
+ enum KeyType key_type;
+ uint8_t iv[16];
};
/*
int needed, cur_needed;
int cur_seq_no;
int64_t last_load_time;
+
+ char key_url[MAX_URL_SIZE];
+ uint8_t key[16];
};
typedef struct AppleHTTPContext {
int cur_seq_no;
int end_of_segment;
int first_packet;
+ int64_t first_timestamp;
+ AVIOInterruptCB *interrupt_callback;
} AppleHTTPContext;
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
ffurl_close(var->input);
if (var->ctx) {
var->ctx->pb = NULL;
- av_close_input_file(var->ctx);
+ avformat_close_input(&var->ctx);
}
av_free(var);
}
}
}
+struct key_info {
+ char uri[MAX_URL_SIZE];
+ char method[10];
+ char iv[35];
+};
+
+static void handle_key_args(struct key_info *info, const char *key,
+ int key_len, char **dest, int *dest_len)
+{
+ if (!strncmp(key, "METHOD=", key_len)) {
+ *dest = info->method;
+ *dest_len = sizeof(info->method);
+ } else if (!strncmp(key, "URI=", key_len)) {
+ *dest = info->uri;
+ *dest_len = sizeof(info->uri);
+ } else if (!strncmp(key, "IV=", key_len)) {
+ *dest = info->iv;
+ *dest_len = sizeof(info->iv);
+ }
+}
+
static int parse_playlist(AppleHTTPContext *c, const char *url,
struct variant *var, AVIOContext *in)
{
int ret = 0, duration = 0, is_segment = 0, is_variant = 0, bandwidth = 0;
+ enum KeyType key_type = KEY_NONE;
+ uint8_t iv[16] = "";
+ int has_iv = 0;
+ char key[MAX_URL_SIZE] = "";
char line[1024];
const char *ptr;
int close_in = 0;
if (!in) {
close_in = 1;
- if ((ret = avio_open(&in, url, AVIO_FLAG_READ)) < 0)
+ if ((ret = avio_open2(&in, url, AVIO_FLAG_READ,
+ c->interrupt_callback, NULL)) < 0)
return ret;
}
ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
&info);
bandwidth = atoi(info.bandwidth);
+ } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
+ struct key_info info = {{0}};
+ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
+ &info);
+ key_type = KEY_NONE;
+ has_iv = 0;
+ if (!strcmp(info.method, "AES-128"))
+ key_type = KEY_AES_128;
+ if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
+ ff_hex_to_data(iv, info.iv + 2);
+ has_iv = 1;
+ }
+ av_strlcpy(key, info.uri, sizeof(key));
} else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
if (!var) {
var = new_variant(c, 0, url, NULL);
goto fail;
}
seg->duration = duration;
+ seg->key_type = key_type;
+ if (has_iv) {
+ memcpy(seg->iv, iv, sizeof(iv));
+ } else {
+ int seq = var->start_seq_no + var->n_segments;
+ memset(seg->iv, 0, sizeof(seg->iv));
+ AV_WB32(seg->iv + 12, seq);
+ }
+ ff_make_absolute_url(seg->key, sizeof(seg->key), url, key);
ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);
dynarray_add(&var->segments, &var->n_segments, seg);
is_segment = 0;
return ret;
}
+static int open_input(struct variant *var)
+{
+ struct segment *seg = var->segments[var->cur_seq_no - var->start_seq_no];
+ if (seg->key_type == KEY_NONE) {
+ return ffurl_open(&var->input, seg->url, AVIO_FLAG_READ,
+ &var->parent->interrupt_callback, NULL);
+ } else if (seg->key_type == KEY_AES_128) {
+ char iv[33], key[33], url[MAX_URL_SIZE];
+ int ret;
+ if (strcmp(seg->key, var->key_url)) {
+ URLContext *uc;
+ if (ffurl_open(&uc, seg->key, AVIO_FLAG_READ,
+ &var->parent->interrupt_callback, NULL) == 0) {
+ if (ffurl_read_complete(uc, var->key, sizeof(var->key))
+ != sizeof(var->key)) {
+ av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
+ seg->key);
+ }
+ ffurl_close(uc);
+ } else {
+ av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
+ seg->key);
+ }
+ av_strlcpy(var->key_url, seg->key, sizeof(var->key_url));
+ }
+ ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
+ ff_data_to_hex(key, var->key, sizeof(var->key), 0);
+ iv[32] = key[32] = '\0';
+ if (strstr(seg->url, "://"))
+ snprintf(url, sizeof(url), "crypto+%s", seg->url);
+ else
+ snprintf(url, sizeof(url), "crypto:%s", seg->url);
+ if ((ret = ffurl_alloc(&var->input, url, AVIO_FLAG_READ,
+ &var->parent->interrupt_callback)) < 0)
+ return ret;
+ av_opt_set(var->input->priv_data, "key", key, 0);
+ av_opt_set(var->input->priv_data, "iv", iv, 0);
+ if ((ret = ffurl_connect(var->input, NULL)) < 0) {
+ ffurl_close(var->input);
+ var->input = NULL;
+ return ret;
+ }
+ return 0;
+ }
+ return AVERROR(ENOSYS);
+}
+
static int read_data(void *opaque, uint8_t *buf, int buf_size)
{
struct variant *v = opaque;
return AVERROR_EOF;
while (av_gettime() - v->last_load_time <
v->target_duration*1000000) {
- if (url_interrupt_cb())
+ if (ff_check_interrupt(c->interrupt_callback))
return AVERROR_EXIT;
usleep(100*1000);
}
goto reload;
}
- ret = ffurl_open(&v->input,
- v->segments[v->cur_seq_no - v->start_seq_no]->url,
- AVIO_FLAG_READ);
+ ret = open_input(v);
if (ret < 0)
return ret;
}
c->end_of_segment = 1;
c->cur_seq_no = v->cur_seq_no;
- if (v->ctx) {
+ if (v->ctx && v->ctx->nb_streams) {
v->needed = 0;
for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
i++) {
AppleHTTPContext *c = s->priv_data;
int ret = 0, i, j, stream_offset = 0;
+ c->interrupt_callback = &s->interrupt_callback;
+
if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
goto fail;
for (i = 0; i < c->n_variants; i++) {
struct variant *v = c->variants[i];
AVInputFormat *in_fmt = NULL;
+ char bitrate_str[20];
if (v->n_segments == 0)
continue;
+ if (!(v->ctx = avformat_alloc_context())) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
v->index = i;
v->needed = 1;
v->parent = s;
v->pb.seekable = 0;
ret = av_probe_input_buffer(&v->pb, &in_fmt, v->segments[0]->url,
NULL, 0, 0);
- if (ret < 0)
+ if (ret < 0) {
+ /* Free the ctx - it isn't initialized properly at this point,
+ * so avformat_close_input shouldn't be called. If
+ * avformat_open_input fails below, it frees and zeros the
+ * context, so it doesn't need any special treatment like this. */
+ avformat_free_context(v->ctx);
+ v->ctx = NULL;
goto fail;
- ret = av_open_input_stream(&v->ctx, &v->pb, v->segments[0]->url,
- in_fmt, NULL);
+ }
+ v->ctx->pb = &v->pb;
+ ret = avformat_open_input(&v->ctx, v->segments[0]->url, in_fmt, NULL);
if (ret < 0)
goto fail;
v->stream_offset = stream_offset;
+ snprintf(bitrate_str, sizeof(bitrate_str), "%d", v->bandwidth);
/* Create new AVStreams for each stream in this variant */
for (j = 0; j < v->ctx->nb_streams; j++) {
- AVStream *st = av_new_stream(s, i);
+ AVStream *st = avformat_new_stream(s, NULL);
if (!st) {
ret = AVERROR(ENOMEM);
goto fail;
}
+ st->id = i;
avcodec_copy_context(st->codec, v->ctx->streams[j]->codec);
+ if (v->bandwidth)
+ av_dict_set(&st->metadata, "variant_bitrate", bitrate_str,
+ 0);
}
stream_offset += v->ctx->nb_streams;
}
c->first_packet = 1;
+ c->first_timestamp = AV_NOPTS_VALUE;
return 0;
fail:
if (!var->pb.eof_reached)
return ret;
reset_packet(&var->pkt);
+ } else {
+ if (c->first_timestamp == AV_NOPTS_VALUE)
+ c->first_timestamp = var->pkt.dts;
}
}
/* Check if this stream has the packet with the lowest dts */
for (i = 0; i < c->n_variants; i++) {
/* Reset reading */
struct variant *var = c->variants[i];
- int64_t pos = 0;
+ int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ? 0 :
+ av_rescale_rnd(c->first_timestamp, 1,
+ stream_index >= 0 ? s->streams[stream_index]->time_base.den : AV_TIME_BASE,
+ flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
if (var->input) {
ffurl_close(var->input);
var->input = NULL;
}
AVInputFormat ff_applehttp_demuxer = {
- "applehttp",
- NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming format"),
- sizeof(AppleHTTPContext),
- applehttp_probe,
- applehttp_read_header,
- applehttp_read_packet,
- applehttp_close,
- applehttp_read_seek,
+ .name = "applehttp",
+ .long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming format"),
+ .priv_data_size = sizeof(AppleHTTPContext),
+ .read_probe = applehttp_probe,
+ .read_header = applehttp_read_header,
+ .read_packet = applehttp_read_packet,
+ .read_close = applehttp_close,
+ .read_seek = applehttp_read_seek,
};
projects / ffmpeg / blobdiff