*/
#include "libavutil/intreadwrite.h"
+#include "libavutil/intfloat.h"
#include "avformat.h"
+#include "internal.h"
#include "riff.h"
typedef struct {
return 0;
}
-//! little macro to sanitize packet size
+/// little macro to sanitize packet size
#define PKTSIZE(s) (s & 0xffffff)
/**
avio_rl32(pb); // unused, "desiredheight"
avio_r8(pb); // 'P' == progressive, 'I' == interlaced
avio_skip(pb, 3); // padding
- aspect = av_int2dbl(avio_rl64(pb));
+ aspect = av_int2double(avio_rl64(pb));
if (aspect > 0.9999 && aspect < 1.0001)
aspect = 4.0 / 3.0;
- fps = av_int2dbl(avio_rl64(pb));
+ fps = av_int2double(avio_rl64(pb));
// number of packets per stream type, -1 means unknown, e.g. streaming
v_packs = avio_rl32(pb);
if (v_packs) {
ctx->v_id = stream_nr++;
- vst = av_new_stream(s, ctx->v_id);
+ vst = avformat_new_stream(s, NULL);
if (!vst)
return AVERROR(ENOMEM);
vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->bits_per_coded_sample = 10;
vst->sample_aspect_ratio = av_d2q(aspect * height / width, 10000);
vst->r_frame_rate = av_d2q(fps, 60000);
- av_set_pts_info(vst, 32, 1, 1000);
+ avpriv_set_pts_info(vst, 32, 1, 1000);
} else
ctx->v_id = -1;
if (a_packs) {
ctx->a_id = stream_nr++;
- ast = av_new_stream(s, ctx->a_id);
+ ast = avformat_new_stream(s, NULL);
if (!ast)
return AVERROR(ENOMEM);
ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ast->codec->bit_rate = 2 * 2 * 44100 * 8;
ast->codec->block_align = 2 * 2;
ast->codec->bits_per_coded_sample = 16;
- av_set_pts_info(ast, 32, 1, 1000);
+ avpriv_set_pts_info(ast, 32, 1, 1000);
} else
ctx->a_id = -1;
ret = av_new_packet(pkt, copyhdrsize + size);
if (ret < 0)
return ret;
- // HACK: we have no idea if it is a keyframe,
- // but if we mark none seeking will not work at all.
- pkt->flags |= AV_PKT_FLAG_KEY;
+
pkt->pos = pos;
+ pkt->flags |= hdr[2] == 0 ? AV_PKT_FLAG_KEY : 0;
pkt->pts = AV_RL32(&hdr[4]);
pkt->stream_index = ctx->v_id;
memcpy(pkt->data, hdr, copyhdrsize);
return AVERROR(EIO);
}
+/**
+ * \brief looks for the string RTjjjjjjjjjj in the stream too resync reading
+ * \return 1 if the syncword is found 0 otherwise.
+ */
+static int nuv_resync(AVFormatContext *s, int64_t pos_limit) {
+ AVIOContext *pb = s->pb;
+ uint32_t tag = 0;
+ while(!url_feof(pb) && avio_tell(pb) < pos_limit) {
+ tag = (tag << 8) | avio_r8(pb);
+ if (tag == MKBETAG('R','T','j','j') &&
+ (tag = avio_rb32(pb)) == MKBETAG('j','j','j','j') &&
+ (tag = avio_rb32(pb)) == MKBETAG('j','j','j','j'))
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * \brief attempts to read a timestamp from stream at the given stream position
+ * \return timestamp if successfull and AV_NOPTS_VALUE if failure
+ */
+static int64_t nuv_read_dts(AVFormatContext *s, int stream_index,
+ int64_t *ppos, int64_t pos_limit)
+{
+ NUVContext *ctx = s->priv_data;
+ AVIOContext *pb = s->pb;
+ uint8_t hdr[HDRSIZE];
+ nuv_frametype frametype;
+ int size, key, idx;
+ int64_t pos, dts;
+
+ if (avio_seek(pb, *ppos, SEEK_SET) < 0)
+ return AV_NOPTS_VALUE;
+
+ if (!nuv_resync(s, pos_limit))
+ return AV_NOPTS_VALUE;
+
+ while (!url_feof(pb) && avio_tell(pb) < pos_limit) {
+ if (avio_read(pb, hdr, HDRSIZE) < HDRSIZE)
+ return AV_NOPTS_VALUE;
+ frametype = hdr[0];
+ size = PKTSIZE(AV_RL32(&hdr[8]));
+ switch (frametype) {
+ case NUV_SEEKP:
+ break;
+ case NUV_AUDIO:
+ case NUV_VIDEO:
+ if (frametype == NUV_VIDEO) {
+ idx = ctx->v_id;
+ key = hdr[2] == 0;
+ } else {
+ idx = ctx->a_id;
+ key = 1;
+ }
+ if (stream_index == idx) {
+
+ pos = avio_tell(s->pb) - HDRSIZE;
+ dts = AV_RL32(&hdr[4]);
+
+ // TODO - add general support in av_gen_search, so it adds positions after reading timestamps
+ av_add_index_entry(s->streams[stream_index], pos, dts, size + HDRSIZE, 0,
+ key ? AVINDEX_KEYFRAME : 0);
+
+ *ppos = pos;
+ return dts;
+ }
+ default:
+ avio_skip(pb, size);
+ break;
+ }
+ }
+ return AV_NOPTS_VALUE;
+}
+
+
AVInputFormat ff_nuv_demuxer = {
- "nuv",
- NULL_IF_CONFIG_SMALL("NuppelVideo format"),
- sizeof(NUVContext),
- nuv_probe,
- nuv_header,
- nuv_packet,
- NULL,
- NULL,
+ .name = "nuv",
+ .long_name = NULL_IF_CONFIG_SMALL("NuppelVideo format"),
+ .priv_data_size = sizeof(NUVContext),
+ .read_probe = nuv_probe,
+ .read_header = nuv_header,
+ .read_packet = nuv_packet,
+ .read_timestamp = nuv_read_dts,
.flags = AVFMT_GENERIC_INDEX,
};