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-rw-r--r--libavformat/gxf.c87
1 files changed, 70 insertions, 17 deletions
diff --git a/libavformat/gxf.c b/libavformat/gxf.c
index 189584035b..d9b629d7de 100644
--- a/libavformat/gxf.c
+++ b/libavformat/gxf.c
@@ -2,20 +2,20 @@
* GXF demuxer.
* Copyright (c) 2006 Reimar Doeffinger
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -33,9 +33,31 @@ struct gxf_stream_info {
int64_t last_field;
AVRational frames_per_second;
int32_t fields_per_frame;
+ int64_t track_aux_data;
};
/**
+ * @brief parse gxf timecode and add it to metadata
+ */
+static int add_timecode_metadata(AVDictionary **pm, const char *key, uint32_t timecode, int fields_per_frame)
+{
+ char tmp[128];
+ int field = timecode & 0xff;
+ int frame = fields_per_frame ? field / fields_per_frame : field;
+ int second = (timecode >> 8) & 0xff;
+ int minute = (timecode >> 16) & 0xff;
+ int hour = (timecode >> 24) & 0x1f;
+ int drop = (timecode >> 29) & 1;
+ // bit 30: color_frame, unused
+ // ignore invalid time code
+ if (timecode >> 31)
+ return 0;
+ snprintf(tmp, sizeof(tmp), "%02d:%02d:%02d%c%02d",
+ hour, minute, second, drop ? ';' : ':', frame);
+ return av_dict_set(pm, key, tmp, 0);
+}
+
+/**
* @brief parses a packet header, extracting type and length
* @param pb AVIOContext to read header from
* @param type detected packet type is stored here
@@ -96,12 +118,10 @@ static int get_sindex(AVFormatContext *s, int id, int format) {
st->codec->codec_id = AV_CODEC_ID_MJPEG;
break;
case 13:
- case 15:
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = AV_CODEC_ID_DVVIDEO;
- break;
case 14:
+ case 15:
case 16:
+ case 25:
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = AV_CODEC_ID_DVVIDEO;
break;
@@ -145,6 +165,12 @@ static int get_sindex(AVFormatContext *s, int id, int format) {
st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
st->codec->sample_rate = 48000;
break;
+ case 26: /* AVCi50 / AVCi100 (AVC Intra) */
+ case 29: /* AVCHD */
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = AV_CODEC_ID_H264;
+ st->need_parsing = AVSTREAM_PARSE_HEADERS;
+ break;
// timecode tracks:
case 7:
case 8:
@@ -152,6 +178,10 @@ static int get_sindex(AVFormatContext *s, int id, int format) {
st->codec->codec_type = AVMEDIA_TYPE_DATA;
st->codec->codec_id = AV_CODEC_ID_NONE;
break;
+ case 30:
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+ st->codec->codec_id = AV_CODEC_ID_DNXHD;
+ break;
default:
st->codec->codec_type = AVMEDIA_TYPE_UNKNOWN;
st->codec->codec_id = AV_CODEC_ID_NONE;
@@ -228,6 +258,7 @@ static AVRational fps_umf2avr(uint32_t flags) {
static void gxf_track_tags(AVIOContext *pb, int *len, struct gxf_stream_info *si) {
si->frames_per_second = (AVRational){0, 0};
si->fields_per_frame = 0;
+ si->track_aux_data = 0x80000000;
while (*len >= 2) {
GXFTrackTag tag = avio_r8(pb);
int tlen = avio_r8(pb);
@@ -241,7 +272,9 @@ static void gxf_track_tags(AVIOContext *pb, int *len, struct gxf_stream_info *si
si->frames_per_second = fps_tag2avr(value);
else if (tag == TRACK_FPF && (value == 1 || value == 2))
si->fields_per_frame = value;
- } else
+ } else if (tlen == 8 && tag == TRACK_AUX)
+ si->track_aux_data = avio_rl64(pb);
+ else
avio_skip(pb, tlen);
}
}
@@ -251,15 +284,16 @@ static void gxf_track_tags(AVIOContext *pb, int *len, struct gxf_stream_info *si
*/
static void gxf_read_index(AVFormatContext *s, int pkt_len) {
AVIOContext *pb = s->pb;
- AVStream *st = s->streams[0];
+ AVStream *st;
uint32_t fields_per_map = avio_rl32(pb);
uint32_t map_cnt = avio_rl32(pb);
int i;
pkt_len -= 8;
- if (s->flags & AVFMT_FLAG_IGNIDX) {
+ if ((s->flags & AVFMT_FLAG_IGNIDX) || !s->streams) {
avio_skip(pb, pkt_len);
return;
}
+ st = s->streams[0];
if (map_cnt > 1000) {
av_log(s, AV_LOG_ERROR,
"too many index entries %"PRIu32" (%"PRIx32")\n",
@@ -321,8 +355,6 @@ static int gxf_header(AVFormatContext *s) {
track_id = avio_r8(pb);
track_len = avio_rb16(pb);
len -= track_len;
- gxf_track_tags(pb, &track_len, si);
- avio_skip(pb, track_len);
if (!(track_type & 0x80)) {
av_log(s, AV_LOG_ERROR, "invalid track type %x\n", track_type);
continue;
@@ -333,6 +365,16 @@ static int gxf_header(AVFormatContext *s) {
continue;
}
track_id &= 0x3f;
+ gxf_track_tags(pb, &track_len, si);
+ // check for timecode tracks
+ if (track_type == 7 || track_type == 8 || track_type == 24) {
+ add_timecode_metadata(&s->metadata, "timecode",
+ si->track_aux_data & 0xffffffff,
+ si->fields_per_frame);
+
+ }
+ avio_skip(pb, track_len);
+
idx = get_sindex(s, track_id, track_type);
if (idx < 0) continue;
st = s->streams[idx];
@@ -367,10 +409,21 @@ static int gxf_header(AVFormatContext *s) {
avio_skip(pb, 0x30); // payload description
fps = fps_umf2avr(avio_rl32(pb));
if (!main_timebase.num || !main_timebase.den) {
+ av_log(s, AV_LOG_WARNING, "No FPS track tag, using UMF fps tag."
+ " This might give wrong results.\n");
// this may not always be correct, but simply the best we can get
main_timebase.num = fps.den;
main_timebase.den = fps.num * 2;
}
+
+ if (len >= 0x18) {
+ len -= 0x18;
+ avio_skip(pb, 0x10);
+ add_timecode_metadata(&s->metadata, "timecode_at_mark_in",
+ avio_rl32(pb), si->fields_per_frame);
+ add_timecode_metadata(&s->metadata, "timecode_at_mark_out",
+ avio_rl32(pb), si->fields_per_frame);
+ }
} else
av_log(s, AV_LOG_INFO, "UMF packet too short\n");
} else
@@ -389,7 +442,7 @@ static int gxf_header(AVFormatContext *s) {
#define READ_ONE() \
{ \
- if (!max_interval-- || pb->eof_reached) \
+ if (!max_interval-- || avio_feof(pb)) \
goto out; \
tmp = tmp << 8 | avio_r8(pb); \
}
@@ -451,7 +504,7 @@ static int gxf_packet(AVFormatContext *s, AVPacket *pkt) {
int field_nr, field_info, skip = 0;
int stream_index;
if (!parse_packet_header(pb, &pkt_type, &pkt_len)) {
- if (!pb->eof_reached)
+ if (!avio_feof(pb))
av_log(s, AV_LOG_ERROR, "sync lost\n");
return -1;
}
@@ -503,11 +556,11 @@ static int gxf_packet(AVFormatContext *s, AVPacket *pkt) {
return ret;
}
- return AVERROR(EIO);
+ return AVERROR_EOF;
}
static int gxf_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) {
- int res = 0;
+ int64_t res = 0;
uint64_t pos;
uint64_t maxlen = 100 * 1024 * 1024;
AVStream *st = s->streams[0];
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-15 01:30:18 +0000