* SSA/ASS demuxer
* Copyright (c) 2008 Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <stdint.h>
+
+#include "libavutil/mathematics.h"
+
#include "avformat.h"
#include "internal.h"
#define MAX_LINESIZE 2000
-typedef struct ASSContext{
+typedef struct ASSContext {
uint8_t *event_buffer;
uint8_t **event;
unsigned int event_count;
unsigned int event_index;
-}ASSContext;
+} ASSContext;
static int probe(AVProbeData *p)
{
- const char *header= "[Script Info]";
+ const char *header = "[Script Info]";
- if( !memcmp(p->buf , header, strlen(header))
- || !memcmp(p->buf+3, header, strlen(header)))
+ if (!memcmp(p->buf, header, strlen(header)) ||
+ !memcmp(p->buf + 3, header, strlen(header)))
return AVPROBE_SCORE_MAX;
return 0;
{
int hour, min, sec, hsec;
- if(sscanf(p, "%*[^,],%d:%d:%d%*c%d", &hour, &min, &sec, &hsec) != 4)
+ if (sscanf(p, "%*[^,],%d:%d:%d%*c%d", &hour, &min, &sec, &hsec) != 4)
return AV_NOPTS_VALUE;
-// av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d [%s]\n", i, hour, min, sec, hsec, p);
+ av_log(NULL, AV_LOG_TRACE, "%d %d %d %d [%s]\n", hour, min, sec, hsec, p);
- min+= 60*hour;
- sec+= 60*min;
+ min += 60 * hour;
+ sec += 60 * min;
- return sec*100+hsec;
+ return sec * 100 + hsec;
}
-static int event_cmp(uint8_t **a, uint8_t **b)
+static int event_cmp(const void *_a, const void *_b)
{
+ const uint8_t *const *a = _a, *const *b = _b;
return get_pts(*a) - get_pts(*b);
}
-static int read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int read_header(AVFormatContext *s)
{
int i, len, header_remaining;
ASSContext *ass = s->priv_data;
AVIOContext *pb = s->pb;
AVStream *st;
- int allocated[2]={0};
- uint8_t *p, **dst[2]={0};
- int pos[2]={0};
+ int allocated[2] = { 0 };
+ uint8_t *p, **dst[2] = { 0 };
+ int pos[2] = { 0 };
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
return -1;
- av_set_pts_info(st, 64, 1, 100);
- st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
- st->codec->codec_id= CODEC_ID_SSA;
+ avpriv_set_pts_info(st, 64, 1, 100);
+ st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
+ st->codecpar->codec_id = AV_CODEC_ID_SSA;
- header_remaining= INT_MAX;
- dst[0] = &st->codec->extradata;
+ header_remaining = INT_MAX;
+ dst[0] = &st->codecpar->extradata;
dst[1] = &ass->event_buffer;
- while(!url_feof(pb)){
+ while (!pb->eof_reached) {
uint8_t line[MAX_LINESIZE];
len = ff_get_line(pb, line, sizeof(line));
- if(!memcmp(line, "[Events]", 8))
- header_remaining= 2;
- else if(line[0]=='[')
- header_remaining= INT_MAX;
+ if (!memcmp(line, "[Events]", 8))
+ header_remaining = 2;
+ else if (line[0] == '[')
+ header_remaining = INT_MAX;
- i= header_remaining==0;
+ i = header_remaining == 0;
- if(i && get_pts(line) == AV_NOPTS_VALUE)
+ if (i && get_pts(line) == AV_NOPTS_VALUE)
continue;
- p = av_fast_realloc(*(dst[i]), &allocated[i], pos[i]+MAX_LINESIZE);
- if(!p)
+ p = av_fast_realloc(*(dst[i]), &allocated[i], pos[i] + MAX_LINESIZE);
+ if (!p)
goto fail;
- *(dst[i])= p;
- memcpy(p + pos[i], line, len+1);
+ *(dst[i]) = p;
+ memcpy(p + pos[i], line, len + 1);
pos[i] += len;
- if(i) ass->event_count++;
- else header_remaining--;
+ if (i)
+ ass->event_count++;
+ else
+ header_remaining--;
}
- st->codec->extradata_size= pos[0];
+ st->codecpar->extradata_size = pos[0];
- if(ass->event_count >= UINT_MAX / sizeof(*ass->event))
+ if (ass->event_count >= UINT_MAX / sizeof(*ass->event))
goto fail;
- ass->event= av_malloc(ass->event_count * sizeof(*ass->event));
- p= ass->event_buffer;
- for(i=0; i<ass->event_count; i++){
- ass->event[i]= p;
- while(*p && *p != '\n')
+ ass->event = av_malloc(ass->event_count * sizeof(*ass->event));
+ p = ass->event_buffer;
+ for (i = 0; i < ass->event_count; i++) {
+ ass->event[i] = p;
+ while (*p && *p != '\n')
p++;
p++;
}
- qsort(ass->event, ass->event_count, sizeof(*ass->event), (void*)event_cmp);
+ qsort(ass->event, ass->event_count, sizeof(*ass->event), event_cmp);
return 0;
{
ASSContext *ass = s->priv_data;
uint8_t *p, *end;
+ int ret;
- if(ass->event_index >= ass->event_count)
+ if (ass->event_index >= ass->event_count)
return AVERROR(EIO);
- p= ass->event[ ass->event_index ];
+ p = ass->event[ass->event_index];
- end= strchr(p, '\n');
- av_new_packet(pkt, end ? end-p+1 : strlen(p));
+ end = strchr(p, '\n');
+ ret = av_new_packet(pkt, end ? end - p + 1 : strlen(p));
+ if (ret < 0)
+ return ret;
pkt->flags |= AV_PKT_FLAG_KEY;
- pkt->pos= p - ass->event_buffer + s->streams[0]->codec->extradata_size;
- pkt->pts= pkt->dts= get_pts(p);
+ pkt->pos = p - ass->event_buffer + s->streams[0]->codecpar->extradata_size;
+ pkt->pts = pkt->dts = get_pts(p);
memcpy(pkt->data, p, pkt->size);
ass->event_index++;
ASSContext *ass = s->priv_data;
if (flags & AVSEEK_FLAG_BYTE) {
- return AVERROR_NOTSUPP;
+ return AVERROR(ENOSYS);
} else if (flags & AVSEEK_FLAG_FRAME) {
if (ts < 0 || ts >= ass->event_count)
return AVERROR(ERANGE);
int64_t min_ts_diff = INT64_MAX;
if (stream_index == -1) {
AVRational time_base = s->streams[0]->time_base;
- ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
+ ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base);
min_ts = av_rescale_rnd(min_ts, time_base.den,
- time_base.num * (int64_t)AV_TIME_BASE,
+ time_base.num * (int64_t) AV_TIME_BASE,
AV_ROUND_UP);
max_ts = av_rescale_rnd(max_ts, time_base.den,
- time_base.num * (int64_t)AV_TIME_BASE,
+ time_base.num * (int64_t) AV_TIME_BASE,
AV_ROUND_DOWN);
}
/* TODO: ass->event[] is sorted by pts so we could do a binary search */
- for (i=0; i<ass->event_count; i++) {
- int64_t pts = get_pts(ass->event[i]);
+ for (i = 0; i < ass->event_count; i++) {
+ int64_t pts = get_pts(ass->event[i]);
int64_t ts_diff = FFABS(pts - ts);
if (pts >= min_ts && pts <= max_ts && ts_diff < min_ts_diff) {
min_ts_diff = ts_diff;
- idx = i;
+ idx = i;
}
}
if (idx < 0)
AVInputFormat ff_ass_demuxer = {
.name = "ass",
- .long_name = NULL_IF_CONFIG_SMALL("Advanced SubStation Alpha subtitle format"),
+ .long_name = NULL_IF_CONFIG_SMALL("SSA (SubStation Alpha) subtitle"),
.priv_data_size = sizeof(ASSContext),
.read_probe = probe,
.read_header = read_header,
projects / ffmpeg / blobdiff